drivers/net/wireless/iwlwifi/iwl4965-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 /*
  31  * NOTE:  This file (iwl-base.c) is used to build to multiple hardware targets
  32  * by defining IWL to either 3945 or 4965.  The Makefile used when building
  33  * the base targets will create base-3945.o and base-4965.o
  34  *
  35  * The eventual goal is to move as many of the #if IWL / #endif blocks out of
  36  * this file and into the hardware specific implementation files (iwl-XXXX.c)
  37  * and leave only the common (non #ifdef sprinkled) code in this file
  38  */
  39
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/version.h>
  43 #include <linux/init.h>
  44 #include <linux/pci.h>
  45 #include <linux/dma-mapping.h>
  46 #include <linux/delay.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/wireless.h>
  50 #include <linux/firmware.h>
  51 #include <linux/etherdevice.h>
  52 #include <linux/if_arp.h>
  53
  54 #include <net/ieee80211_radiotap.h>
  55 #include <net/mac80211.h>
  56
  57 #include <asm/div64.h>
  58
  59 #define IWL 4965
  60
  61 #include "iwlwifi.h"
  62 #include "iwl-4965.h"
  63 #include "iwl-helpers.h"
  64
  65 #ifdef CONFIG_IWLWIFI_DEBUG
  66 u32 iwl_debug_level;
  67 #endif
  68
  69 /******************************************************************************
  70  *
  71  * module boiler plate
  72  *
  73  ******************************************************************************/
  74
  75 /* module parameters */
  76 int iwl_param_disable_hw_scan;
  77 int iwl_param_debug;
  78 int iwl_param_disable;      /* def: enable radio */
  79 int iwl_param_antenna;      /* def: 0 = both antennas (use diversity) */
  80 int iwl_param_hwcrypto;     /* def: using software encryption */
  81 int iwl_param_qos_enable = 1;
  82 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
  83
  84 /*
  85  * module name, copyright, version, etc.
  86  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  87  */
  88
  89 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  90
  91 #ifdef CONFIG_IWLWIFI_DEBUG
  92 #define VD "d"
  93 #else
  94 #define VD
  95 #endif
  96
  97 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  98 #define VS "s"
  99 #else
 100 #define VS
 101 #endif
 102
 103 #define IWLWIFI_VERSION "1.1.17k" VD VS
 104 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
 105 #define DRV_VERSION     IWLWIFI_VERSION
 106
 107 /* Change firmware file name, using "-" and incrementing number,
 108  *   *only* when uCode interface or architecture changes so that it
 109  *   is not compatible with earlier drivers.
 110  * This number will also appear in << 8 position of 1st dword of uCode file */
 111 #define IWL4965_UCODE_API "-1"
 112
 113 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 114 MODULE_VERSION(DRV_VERSION);
 115 MODULE_AUTHOR(DRV_COPYRIGHT);
 116 MODULE_LICENSE("GPL");
 117
 118 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 119 {
 120         u16 fc = le16_to_cpu(hdr->frame_control);
 121         int hdr_len = ieee80211_get_hdrlen(fc);
 122
 123         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 124                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 125         return NULL;
 126 }
 127
 128 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
 129                 struct iwl_priv *priv, int mode)
 130 {
 131         int i;
 132
 133         for (i = 0; i < 3; i++)
 134                 if (priv->modes[i].mode == mode)
 135                         return &priv->modes[i];
 136
 137         return NULL;
 138 }
 139
 140 static int iwl_is_empty_essid(const char *essid, int essid_len)
 141 {
 142         /* Single white space is for Linksys APs */
 143         if (essid_len == 1 && essid[0] == ' ')
 144                 return 1;
 145
 146         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 147         while (essid_len) {
 148                 essid_len--;
 149                 if (essid[essid_len] != '\0')
 150                         return 0;
 151         }
 152
 153         return 1;
 154 }
 155
 156 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
 157 {
 158         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 159         const char *s = essid;
 160         char *d = escaped;
 161
 162         if (iwl_is_empty_essid(essid, essid_len)) {
 163                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 164                 return escaped;
 165         }
 166
 167         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 168         while (essid_len--) {
 169                 if (*s == '\0') {
 170                         *d++ = '\\';
 171                         *d++ = '0';
 172                         s++;
 173                 } else
 174                         *d++ = *s++;
 175         }
 176         *d = '\0';
 177         return escaped;
 178 }
 179
 180 static void iwl_print_hex_dump(int level, void *p, u32 len)
 181 {
 182 #ifdef CONFIG_IWLWIFI_DEBUG
 183         if (!(iwl_debug_level & level))
 184                 return;
 185
 186         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 187                         p, len, 1);
 188 #endif
 189 }
 190
 191 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 192  * DMA services
 193  *
 194  * Theory of operation
 195  *
 196  * A queue is a circular buffers with 'Read' and 'Write' pointers.
 197  * 2 empty entries always kept in the buffer to protect from overflow.
 198  *
 199  * For Tx queue, there are low mark and high mark limits. If, after queuing
 200  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 201  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 202  * Tx queue resumed.
 203  *
 204  * The IWL operates with six queues, one receive queue in the device's
 205  * sram, one transmit queue for sending commands to the device firmware,
 206  * and four transmit queues for data.
 207  ***************************************************/
 208
 209 static int iwl_queue_space(const struct iwl_queue *q)
 210 {
 211         int s = q->read_ptr - q->write_ptr;
 212
 213         if (q->read_ptr > q->write_ptr)
 214                 s -= q->n_bd;
 215
 216         if (s <= 0)
 217                 s += q->n_window;
 218         /* keep some reserve to not confuse empty and full situations */
 219         s -= 2;
 220         if (s < 0)
 221                 s = 0;
 222         return s;
 223 }
 224
 225 /* XXX: n_bd must be power-of-two size */
 226 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 227 {
 228         return ++index & (n_bd - 1);
 229 }
 230
 231 /* XXX: n_bd must be power-of-two size */
 232 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 233 {
 234         return --index & (n_bd - 1);
 235 }
 236
 237 static inline int x2_queue_used(const struct iwl_queue *q, int i)
 238 {
 239         return q->write_ptr > q->read_ptr ?
 240                 (i >= q->read_ptr && i < q->write_ptr) :
 241                 !(i < q->read_ptr && i >= q->write_ptr);
 242 }
 243
 244 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
 245 {
 246         if (is_huge)
 247                 return q->n_window;
 248
 249         return index & (q->n_window - 1);
 250 }
 251
 252 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
 253                           int count, int slots_num, u32 id)
 254 {
 255         q->n_bd = count;
 256         q->n_window = slots_num;
 257         q->id = id;
 258
 259         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 260          * and iwl_queue_dec_wrap are broken. */
 261         BUG_ON(!is_power_of_2(count));
 262
 263         /* slots_num must be power-of-two size, otherwise
 264          * get_cmd_index is broken. */
 265         BUG_ON(!is_power_of_2(slots_num));
 266
 267         q->low_mark = q->n_window / 4;
 268         if (q->low_mark < 4)
 269                 q->low_mark = 4;
 270
 271         q->high_mark = q->n_window / 8;
 272         if (q->high_mark < 2)
 273                 q->high_mark = 2;
 274
 275         q->write_ptr = q->read_ptr = 0;
 276
 277         return 0;
 278 }
 279
 280 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
 281                               struct iwl_tx_queue *txq, u32 id)
 282 {
 283         struct pci_dev *dev = priv->pci_dev;
 284
 285         if (id != IWL_CMD_QUEUE_NUM) {
 286                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 287                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 288                 if (!txq->txb) {
 289                         IWL_ERROR("kmalloc for auxiliary BD "
 290                                   "structures failed\n");
 291                         goto error;
 292                 }
 293         } else
 294                 txq->txb = NULL;
 295
 296         txq->bd = pci_alloc_consistent(dev,
 297                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 298                         &txq->q.dma_addr);
 299
 300         if (!txq->bd) {
 301                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 302                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 303                 goto error;
 304         }
 305         txq->q.id = id;
 306
 307         return 0;
 308
 309  error:
 310         if (txq->txb) {
 311                 kfree(txq->txb);
 312                 txq->txb = NULL;
 313         }
 314
 315         return -ENOMEM;
 316 }
 317
 318 int iwl_tx_queue_init(struct iwl_priv *priv,
 319                       struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
 320 {
 321         struct pci_dev *dev = priv->pci_dev;
 322         int len;
 323         int rc = 0;
 324
 325         /* allocate command space + one big command for scan since scan
 326          * command is very huge the system will not have two scan at the
 327          * same time */
 328         len = sizeof(struct iwl_cmd) * slots_num;
 329         if (txq_id == IWL_CMD_QUEUE_NUM)
 330                 len +=  IWL_MAX_SCAN_SIZE;
 331         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 332         if (!txq->cmd)
 333                 return -ENOMEM;
 334
 335         rc = iwl_tx_queue_alloc(priv, txq, txq_id);
 336         if (rc) {
 337                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 338
 339                 return -ENOMEM;
 340         }
 341         txq->need_update = 0;
 342
 343         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 344          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 345         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 346         iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 347
 348         iwl_hw_tx_queue_init(priv, txq);
 349
 350         return 0;
 351 }
 352
 353 /**
 354  * iwl_tx_queue_free - Deallocate DMA queue.
 355  * @txq: Transmit queue to deallocate.
 356  *
 357  * Empty queue by removing and destroying all BD's.
 358  * Free all buffers.  txq itself is not freed.
 359  *
 360  */
 361 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 362 {
 363         struct iwl_queue *q = &txq->q;
 364         struct pci_dev *dev = priv->pci_dev;
 365         int len;
 366
 367         if (q->n_bd == 0)
 368                 return;
 369
 370         /* first, empty all BD's */
 371         for (; q->write_ptr != q->read_ptr;
 372              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 373                 iwl_hw_txq_free_tfd(priv, txq);
 374
 375         len = sizeof(struct iwl_cmd) * q->n_window;
 376         if (q->id == IWL_CMD_QUEUE_NUM)
 377                 len += IWL_MAX_SCAN_SIZE;
 378
 379         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 380
 381         /* free buffers belonging to queue itself */
 382         if (txq->q.n_bd)
 383                 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
 384                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 385
 386         if (txq->txb) {
 387                 kfree(txq->txb);
 388                 txq->txb = NULL;
 389         }
 390
 391         /* 0 fill whole structure */
 392         memset(txq, 0, sizeof(*txq));
 393 }
 394
 395 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 396
 397 /*************** STATION TABLE MANAGEMENT ****
 398  *
 399  * NOTE:  This needs to be overhauled to better synchronize between
 400  * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
 401  *
 402  * mac80211 should also be examined to determine if sta_info is duplicating
 403  * the functionality provided here
 404  */
 405
 406 /**************************************************************/
 407
 408 #if 0 /* temporary disable till we add real remove station */
 409 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 410 {
 411         int index = IWL_INVALID_STATION;
 412         int i;
 413         unsigned long flags;
 414
 415         spin_lock_irqsave(&priv->sta_lock, flags);
 416
 417         if (is_ap)
 418                 index = IWL_AP_ID;
 419         else if (is_broadcast_ether_addr(addr))
 420                 index = priv->hw_setting.bcast_sta_id;
 421         else
 422                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 423                         if (priv->stations[i].used &&
 424                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 425                                                 addr)) {
 426                                 index = i;
 427                                 break;
 428                         }
 429
 430         if (unlikely(index == IWL_INVALID_STATION))
 431                 goto out;
 432
 433         if (priv->stations[index].used) {
 434                 priv->stations[index].used = 0;
 435                 priv->num_stations--;
 436         }
 437
 438         BUG_ON(priv->num_stations < 0);
 439
 440 out:
 441         spin_unlock_irqrestore(&priv->sta_lock, flags);
 442         return 0;
 443 }
 444 #endif
 445
 446 static void iwl_clear_stations_table(struct iwl_priv *priv)
 447 {
 448         unsigned long flags;
 449
 450         spin_lock_irqsave(&priv->sta_lock, flags);
 451
 452         priv->num_stations = 0;
 453         memset(priv->stations, 0, sizeof(priv->stations));
 454
 455         spin_unlock_irqrestore(&priv->sta_lock, flags);
 456 }
 457
 458 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
 459 {
 460         int i;
 461         int index = IWL_INVALID_STATION;
 462         struct iwl_station_entry *station;
 463         unsigned long flags_spin;
 464         DECLARE_MAC_BUF(mac);
 465
 466         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 467         if (is_ap)
 468                 index = IWL_AP_ID;
 469         else if (is_broadcast_ether_addr(addr))
 470                 index = priv->hw_setting.bcast_sta_id;
 471         else
 472                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 473                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 474                                                 addr)) {
 475                                 index = i;
 476                                 break;
 477                         }
 478
 479                         if (!priv->stations[i].used &&
 480                             index == IWL_INVALID_STATION)
 481                                 index = i;
 482                 }
 483
 484
 485         /* These two conditions has the same outcome but keep them separate
 486           since they have different meaning */
 487         if (unlikely(index == IWL_INVALID_STATION)) {
 488                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 489                 return index;
 490         }
 491
 492         if (priv->stations[index].used &&
 493             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 494                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 495                 return index;
 496         }
 497
 498
 499         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 500         station = &priv->stations[index];
 501         station->used = 1;
 502         priv->num_stations++;
 503
 504         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 505         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 506         station->sta.mode = 0;
 507         station->sta.sta.sta_id = index;
 508         station->sta.station_flags = 0;
 509
 510 #ifdef CONFIG_IWLWIFI_HT
 511         /* BCAST station and IBSS stations do not work in HT mode */
 512         if (index != priv->hw_setting.bcast_sta_id &&
 513             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 514                 iwl4965_set_ht_add_station(priv, index);
 515 #endif /*CONFIG_IWLWIFI_HT*/
 516
 517         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 518         iwl_send_add_station(priv, &station->sta, flags);
 519         return index;
 520
 521 }
 522
 523 /*************** DRIVER STATUS FUNCTIONS   *****/
 524
 525 static inline int iwl_is_ready(struct iwl_priv *priv)
 526 {
 527         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 528          * set but EXIT_PENDING is not */
 529         return test_bit(STATUS_READY, &priv->status) &&
 530                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 531                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 532 }
 533
 534 static inline int iwl_is_alive(struct iwl_priv *priv)
 535 {
 536         return test_bit(STATUS_ALIVE, &priv->status);
 537 }
 538
 539 static inline int iwl_is_init(struct iwl_priv *priv)
 540 {
 541         return test_bit(STATUS_INIT, &priv->status);
 542 }
 543
 544 static inline int iwl_is_rfkill(struct iwl_priv *priv)
 545 {
 546         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 547                test_bit(STATUS_RF_KILL_SW, &priv->status);
 548 }
 549
 550 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
 551 {
 552
 553         if (iwl_is_rfkill(priv))
 554                 return 0;
 555
 556         return iwl_is_ready(priv);
 557 }
 558
 559 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 560
 561 #define IWL_CMD(x) case x : return #x
 562
 563 static const char *get_cmd_string(u8 cmd)
 564 {
 565         switch (cmd) {
 566                 IWL_CMD(REPLY_ALIVE);
 567                 IWL_CMD(REPLY_ERROR);
 568                 IWL_CMD(REPLY_RXON);
 569                 IWL_CMD(REPLY_RXON_ASSOC);
 570                 IWL_CMD(REPLY_QOS_PARAM);
 571                 IWL_CMD(REPLY_RXON_TIMING);
 572                 IWL_CMD(REPLY_ADD_STA);
 573                 IWL_CMD(REPLY_REMOVE_STA);
 574                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 575                 IWL_CMD(REPLY_TX);
 576                 IWL_CMD(REPLY_RATE_SCALE);
 577                 IWL_CMD(REPLY_LEDS_CMD);
 578                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 579                 IWL_CMD(RADAR_NOTIFICATION);
 580                 IWL_CMD(REPLY_QUIET_CMD);
 581                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 582                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 583                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 584                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 585                 IWL_CMD(POWER_TABLE_CMD);
 586                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 587                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 588                 IWL_CMD(REPLY_SCAN_CMD);
 589                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 590                 IWL_CMD(SCAN_START_NOTIFICATION);
 591                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 592                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 593                 IWL_CMD(BEACON_NOTIFICATION);
 594                 IWL_CMD(REPLY_TX_BEACON);
 595                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 596                 IWL_CMD(QUIET_NOTIFICATION);
 597                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 598                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 599                 IWL_CMD(REPLY_BT_CONFIG);
 600                 IWL_CMD(REPLY_STATISTICS_CMD);
 601                 IWL_CMD(STATISTICS_NOTIFICATION);
 602                 IWL_CMD(REPLY_CARD_STATE_CMD);
 603                 IWL_CMD(CARD_STATE_NOTIFICATION);
 604                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 605                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 606                 IWL_CMD(SENSITIVITY_CMD);
 607                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 608                 IWL_CMD(REPLY_RX_PHY_CMD);
 609                 IWL_CMD(REPLY_RX_MPDU_CMD);
 610                 IWL_CMD(REPLY_4965_RX);
 611                 IWL_CMD(REPLY_COMPRESSED_BA);
 612         default:
 613                 return "UNKNOWN";
 614
 615         }
 616 }
 617
 618 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 619
 620 /**
 621  * iwl_enqueue_hcmd - enqueue a uCode command
 622  * @priv: device private data point
 623  * @cmd: a point to the ucode command structure
 624  *
 625  * The function returns < 0 values to indicate the operation is
 626  * failed. On success, it turns the index (> 0) of command in the
 627  * command queue.
 628  */
 629 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 630 {
 631         struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 632         struct iwl_queue *q = &txq->q;
 633         struct iwl_tfd_frame *tfd;
 634         u32 *control_flags;
 635         struct iwl_cmd *out_cmd;
 636         u32 idx;
 637         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 638         dma_addr_t phys_addr;
 639         int ret;
 640         unsigned long flags;
 641
 642         /* If any of the command structures end up being larger than
 643          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 644          * we will need to increase the size of the TFD entries */
 645         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 646                !(cmd->meta.flags & CMD_SIZE_HUGE));
 647
 648         if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 649                 IWL_ERROR("No space for Tx\n");
 650                 return -ENOSPC;
 651         }
 652
 653         spin_lock_irqsave(&priv->hcmd_lock, flags);
 654
 655         tfd = &txq->bd[q->write_ptr];
 656         memset(tfd, 0, sizeof(*tfd));
 657
 658         control_flags = (u32 *) tfd;
 659
 660         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 661         out_cmd = &txq->cmd[idx];
 662
 663         out_cmd->hdr.cmd = cmd->id;
 664         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 665         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 666
 667         /* At this point, the out_cmd now has all of the incoming cmd
 668          * information */
 669
 670         out_cmd->hdr.flags = 0;
 671         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 672                         INDEX_TO_SEQ(q->write_ptr));
 673         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 674                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 675
 676         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 677                         offsetof(struct iwl_cmd, hdr);
 678         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 679
 680         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 681                      "%d bytes at %d[%d]:%d\n",
 682                      get_cmd_string(out_cmd->hdr.cmd),
 683                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 684                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 685
 686         txq->need_update = 1;
 687         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 688         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 689         iwl_tx_queue_update_write_ptr(priv, txq);
 690
 691         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 692         return ret ? ret : idx;
 693 }
 694
 695 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 696 {
 697         int ret;
 698
 699         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 700
 701         /* An asynchronous command can not expect an SKB to be set. */
 702         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 703
 704         /* An asynchronous command MUST have a callback. */
 705         BUG_ON(!cmd->meta.u.callback);
 706
 707         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 708                 return -EBUSY;
 709
 710         ret = iwl_enqueue_hcmd(priv, cmd);
 711         if (ret < 0) {
 712                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 713                           get_cmd_string(cmd->id), ret);
 714                 return ret;
 715         }
 716         return 0;
 717 }
 718
 719 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 720 {
 721         int cmd_idx;
 722         int ret;
 723         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 724
 725         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 726
 727          /* A synchronous command can not have a callback set. */
 728         BUG_ON(cmd->meta.u.callback != NULL);
 729
 730         if (atomic_xchg(&entry, 1)) {
 731                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 732                           get_cmd_string(cmd->id));
 733                 return -EBUSY;
 734         }
 735
 736         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 737
 738         if (cmd->meta.flags & CMD_WANT_SKB)
 739                 cmd->meta.source = &cmd->meta;
 740
 741         cmd_idx = iwl_enqueue_hcmd(priv, cmd);
 742         if (cmd_idx < 0) {
 743                 ret = cmd_idx;
 744                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 745                           get_cmd_string(cmd->id), ret);
 746                 goto out;
 747         }
 748
 749         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 750                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 751                         HOST_COMPLETE_TIMEOUT);
 752         if (!ret) {
 753                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 754                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 755                                   get_cmd_string(cmd->id),
 756                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 757
 758                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 759                         ret = -ETIMEDOUT;
 760                         goto cancel;
 761                 }
 762         }
 763
 764         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 765                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 766                                get_cmd_string(cmd->id));
 767                 ret = -ECANCELED;
 768                 goto fail;
 769         }
 770         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 771                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 772                                get_cmd_string(cmd->id));
 773                 ret = -EIO;
 774                 goto fail;
 775         }
 776         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 777                 IWL_ERROR("Error: Response NULL in '%s'\n",
 778                           get_cmd_string(cmd->id));
 779                 ret = -EIO;
 780                 goto out;
 781         }
 782
 783         ret = 0;
 784         goto out;
 785
 786 cancel:
 787         if (cmd->meta.flags & CMD_WANT_SKB) {
 788                 struct iwl_cmd *qcmd;
 789
 790                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 791                  * TX cmd queue. Otherwise in case the cmd comes
 792                  * in later, it will possibly set an invalid
 793                  * address (cmd->meta.source). */
 794                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 795                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 796         }
 797 fail:
 798         if (cmd->meta.u.skb) {
 799                 dev_kfree_skb_any(cmd->meta.u.skb);
 800                 cmd->meta.u.skb = NULL;
 801         }
 802 out:
 803         atomic_set(&entry, 0);
 804         return ret;
 805 }
 806
 807 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 808 {
 809         if (cmd->meta.flags & CMD_ASYNC)
 810                 return iwl_send_cmd_async(priv, cmd);
 811
 812         return iwl_send_cmd_sync(priv, cmd);
 813 }
 814
 815 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
 816 {
 817         struct iwl_host_cmd cmd = {
 818                 .id = id,
 819                 .len = len,
 820                 .data = data,
 821         };
 822
 823         return iwl_send_cmd_sync(priv, &cmd);
 824 }
 825
 826 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
 827 {
 828         struct iwl_host_cmd cmd = {
 829                 .id = id,
 830                 .len = sizeof(val),
 831                 .data = &val,
 832         };
 833
 834         return iwl_send_cmd_sync(priv, &cmd);
 835 }
 836
 837 int iwl_send_statistics_request(struct iwl_priv *priv)
 838 {
 839         return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 840 }
 841
 842 /**
 843  * iwl_rxon_add_station - add station into station table.
 844  *
 845  * there is only one AP station with id= IWL_AP_ID
 846  * NOTE: mutex must be held before calling the this fnction
 847 */
 848 static int iwl_rxon_add_station(struct iwl_priv *priv,
 849                                 const u8 *addr, int is_ap)
 850 {
 851         u8 sta_id;
 852
 853         sta_id = iwl_add_station(priv, addr, is_ap, 0);
 854         iwl4965_add_station(priv, addr, is_ap);
 855
 856         return sta_id;
 857 }
 858
 859 /**
 860  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 861  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 862  * @channel: Any channel valid for the requested phymode
 863
 864  * In addition to setting the staging RXON, priv->phymode is also set.
 865  *
 866  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 867  * in the staging RXON flag structure based on the phymode
 868  */
 869 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
 870 {
 871         if (!iwl_get_channel_info(priv, phymode, channel)) {
 872                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 873                                channel, phymode);
 874                 return -EINVAL;
 875         }
 876
 877         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 878             (priv->phymode == phymode))
 879                 return 0;
 880
 881         priv->staging_rxon.channel = cpu_to_le16(channel);
 882         if (phymode == MODE_IEEE80211A)
 883                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 884         else
 885                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 886
 887         priv->phymode = phymode;
 888
 889         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 890
 891         return 0;
 892 }
 893
 894 /**
 895  * iwl_check_rxon_cmd - validate RXON structure is valid
 896  *
 897  * NOTE:  This is really only useful during development and can eventually
 898  * be #ifdef'd out once the driver is stable and folks aren't actively
 899  * making changes
 900  */
 901 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 902 {
 903         int error = 0;
 904         int counter = 1;
 905
 906         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 907                 error |= le32_to_cpu(rxon->flags &
 908                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 909                                  RXON_FLG_RADAR_DETECT_MSK));
 910                 if (error)
 911                         IWL_WARNING("check 24G fields %d | %d\n",
 912                                     counter++, error);
 913         } else {
 914                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 915                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 916                 if (error)
 917                         IWL_WARNING("check 52 fields %d | %d\n",
 918                                     counter++, error);
 919                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 920                 if (error)
 921                         IWL_WARNING("check 52 CCK %d | %d\n",
 922                                     counter++, error);
 923         }
 924         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 925         if (error)
 926                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 927
 928         /* make sure basic rates 6Mbps and 1Mbps are supported */
 929         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 930                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 931         if (error)
 932                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 933
 934         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 935         if (error)
 936                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 937
 938         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 939                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 940         if (error)
 941                 IWL_WARNING("check CCK and short slot %d | %d\n",
 942                             counter++, error);
 943
 944         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 945                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 946         if (error)
 947                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 948                             counter++, error);
 949
 950         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 951                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 952         if (error)
 953                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 954                             counter++, error);
 955
 956         if (error)
 957                 IWL_WARNING("Tuning to channel %d\n",
 958                             le16_to_cpu(rxon->channel));
 959
 960         if (error) {
 961                 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
 962                 return -1;
 963         }
 964         return 0;
 965 }
 966
 967 /**
 968  * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
 969  * @priv: staging_rxon is compared to active_rxon
 970  *
 971  * If the RXON structure is changing sufficient to require a new
 972  * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
 973  * to indicate a new tune is required.
 974  */
 975 static int iwl_full_rxon_required(struct iwl_priv *priv)
 976 {
 977
 978         /* These items are only settable from the full RXON command */
 979         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 980             compare_ether_addr(priv->staging_rxon.bssid_addr,
 981                                priv->active_rxon.bssid_addr) ||
 982             compare_ether_addr(priv->staging_rxon.node_addr,
 983                                priv->active_rxon.node_addr) ||
 984             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 985                                priv->active_rxon.wlap_bssid_addr) ||
 986             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 987             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 988             (priv->staging_rxon.air_propagation !=
 989              priv->active_rxon.air_propagation) ||
 990             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 991              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 992             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 993              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 994             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 995             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 996                 return 1;
 997
 998         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 999          * be updated with the RXON_ASSOC command -- however only some
1000          * flag transitions are allowed using RXON_ASSOC */
1001
1002         /* Check if we are not switching bands */
1003         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1004             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1005                 return 1;
1006
1007         /* Check if we are switching association toggle */
1008         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1009                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1010                 return 1;
1011
1012         return 0;
1013 }
1014
1015 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1016 {
1017         int rc = 0;
1018         struct iwl_rx_packet *res = NULL;
1019         struct iwl_rxon_assoc_cmd rxon_assoc;
1020         struct iwl_host_cmd cmd = {
1021                 .id = REPLY_RXON_ASSOC,
1022                 .len = sizeof(rxon_assoc),
1023                 .meta.flags = CMD_WANT_SKB,
1024                 .data = &rxon_assoc,
1025         };
1026         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1027         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1028
1029         if ((rxon1->flags == rxon2->flags) &&
1030             (rxon1->filter_flags == rxon2->filter_flags) &&
1031             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1032             (rxon1->ofdm_ht_single_stream_basic_rates ==
1033              rxon2->ofdm_ht_single_stream_basic_rates) &&
1034             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1035              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1036             (rxon1->rx_chain == rxon2->rx_chain) &&
1037             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1038                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1039                 return 0;
1040         }
1041
1042         rxon_assoc.flags = priv->staging_rxon.flags;
1043         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1044         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1045         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1046         rxon_assoc.reserved = 0;
1047         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1048             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1049         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1050             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1051         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1052
1053         rc = iwl_send_cmd_sync(priv, &cmd);
1054         if (rc)
1055                 return rc;
1056
1057         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1058         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1059                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1060                 rc = -EIO;
1061         }
1062
1063         priv->alloc_rxb_skb--;
1064         dev_kfree_skb_any(cmd.meta.u.skb);
1065
1066         return rc;
1067 }
1068
1069 /**
1070  * iwl_commit_rxon - commit staging_rxon to hardware
1071  *
1072  * The RXON command in staging_rxon is committed to the hardware and
1073  * the active_rxon structure is updated with the new data.  This
1074  * function correctly transitions out of the RXON_ASSOC_MSK state if
1075  * a HW tune is required based on the RXON structure changes.
1076  */
1077 static int iwl_commit_rxon(struct iwl_priv *priv)
1078 {
1079         /* cast away the const for active_rxon in this function */
1080         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1081         DECLARE_MAC_BUF(mac);
1082         int rc = 0;
1083
1084         if (!iwl_is_alive(priv))
1085                 return -1;
1086
1087         /* always get timestamp with Rx frame */
1088         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1089
1090         rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1091         if (rc) {
1092                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1093                 return -EINVAL;
1094         }
1095
1096         /* If we don't need to send a full RXON, we can use
1097          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1098          * and other flags for the current radio configuration. */
1099         if (!iwl_full_rxon_required(priv)) {
1100                 rc = iwl_send_rxon_assoc(priv);
1101                 if (rc) {
1102                         IWL_ERROR("Error setting RXON_ASSOC "
1103                                   "configuration (%d).\n", rc);
1104                         return rc;
1105                 }
1106
1107                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1108
1109                 return 0;
1110         }
1111
1112         /* station table will be cleared */
1113         priv->assoc_station_added = 0;
1114
1115 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1116         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1117         if (!priv->error_recovering)
1118                 priv->start_calib = 0;
1119
1120         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1121 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1122
1123         /* If we are currently associated and the new config requires
1124          * an RXON_ASSOC and the new config wants the associated mask enabled,
1125          * we must clear the associated from the active configuration
1126          * before we apply the new config */
1127         if (iwl_is_associated(priv) &&
1128             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1129                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1130                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1131
1132                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1133                                       sizeof(struct iwl_rxon_cmd),
1134                                       &priv->active_rxon);
1135
1136                 /* If the mask clearing failed then we set
1137                  * active_rxon back to what it was previously */
1138                 if (rc) {
1139                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1140                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1141                                   "configuration (%d).\n", rc);
1142                         return rc;
1143                 }
1144         }
1145
1146         IWL_DEBUG_INFO("Sending RXON\n"
1147                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1148                        "* channel = %d\n"
1149                        "* bssid = %s\n",
1150                        ((priv->staging_rxon.filter_flags &
1151                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1152                        le16_to_cpu(priv->staging_rxon.channel),
1153                        print_mac(mac, priv->staging_rxon.bssid_addr));
1154
1155         /* Apply the new configuration */
1156         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1157                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1158         if (rc) {
1159                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1160                 return rc;
1161         }
1162
1163         iwl_clear_stations_table(priv);
1164
1165 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1166         if (!priv->error_recovering)
1167                 priv->start_calib = 0;
1168
1169         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1170         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1171 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1172
1173         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1174
1175         /* If we issue a new RXON command which required a tune then we must
1176          * send a new TXPOWER command or we won't be able to Tx any frames */
1177         rc = iwl_hw_reg_send_txpower(priv);
1178         if (rc) {
1179                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1180                 return rc;
1181         }
1182
1183         /* Add the broadcast address so we can send broadcast frames */
1184         if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1185             IWL_INVALID_STATION) {
1186                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1187                 return -EIO;
1188         }
1189
1190         /* If we have set the ASSOC_MSK and we are in BSS mode then
1191          * add the IWL_AP_ID to the station rate table */
1192         if (iwl_is_associated(priv) &&
1193             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1194                 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1195                     == IWL_INVALID_STATION) {
1196                         IWL_ERROR("Error adding AP address for transmit.\n");
1197                         return -EIO;
1198                 }
1199                 priv->assoc_station_added = 1;
1200         }
1201
1202         return 0;
1203 }
1204
1205 static int iwl_send_bt_config(struct iwl_priv *priv)
1206 {
1207         struct iwl_bt_cmd bt_cmd = {
1208                 .flags = 3,
1209                 .lead_time = 0xAA,
1210                 .max_kill = 1,
1211                 .kill_ack_mask = 0,
1212                 .kill_cts_mask = 0,
1213         };
1214
1215         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1216                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1217 }
1218
1219 static int iwl_send_scan_abort(struct iwl_priv *priv)
1220 {
1221         int rc = 0;
1222         struct iwl_rx_packet *res;
1223         struct iwl_host_cmd cmd = {
1224                 .id = REPLY_SCAN_ABORT_CMD,
1225                 .meta.flags = CMD_WANT_SKB,
1226         };
1227
1228         /* If there isn't a scan actively going on in the hardware
1229          * then we are in between scan bands and not actually
1230          * actively scanning, so don't send the abort command */
1231         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1232                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1233                 return 0;
1234         }
1235
1236         rc = iwl_send_cmd_sync(priv, &cmd);
1237         if (rc) {
1238                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1239                 return rc;
1240         }
1241
1242         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1243         if (res->u.status != CAN_ABORT_STATUS) {
1244                 /* The scan abort will return 1 for success or
1245                  * 2 for "failure".  A failure condition can be
1246                  * due to simply not being in an active scan which
1247                  * can occur if we send the scan abort before we
1248                  * the microcode has notified us that a scan is
1249                  * completed. */
1250                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1251                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1252                 clear_bit(STATUS_SCAN_HW, &priv->status);
1253         }
1254
1255         dev_kfree_skb_any(cmd.meta.u.skb);
1256
1257         return rc;
1258 }
1259
1260 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1261                                         struct iwl_cmd *cmd,
1262                                         struct sk_buff *skb)
1263 {
1264         return 1;
1265 }
1266
1267 /*
1268  * CARD_STATE_CMD
1269  *
1270  * Use: Sets the internal card state to enable, disable, or halt
1271  *
1272  * When in the 'enable' state the card operates as normal.
1273  * When in the 'disable' state, the card enters into a low power mode.
1274  * When in the 'halt' state, the card is shut down and must be fully
1275  * restarted to come back on.
1276  */
1277 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1278 {
1279         struct iwl_host_cmd cmd = {
1280                 .id = REPLY_CARD_STATE_CMD,
1281                 .len = sizeof(u32),
1282                 .data = &flags,
1283                 .meta.flags = meta_flag,
1284         };
1285
1286         if (meta_flag & CMD_ASYNC)
1287                 cmd.meta.u.callback = iwl_card_state_sync_callback;
1288
1289         return iwl_send_cmd(priv, &cmd);
1290 }
1291
1292 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1293                                      struct iwl_cmd *cmd, struct sk_buff *skb)
1294 {
1295         struct iwl_rx_packet *res = NULL;
1296
1297         if (!skb) {
1298                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1299                 return 1;
1300         }
1301
1302         res = (struct iwl_rx_packet *)skb->data;
1303         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1304                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1305                           res->hdr.flags);
1306                 return 1;
1307         }
1308
1309         switch (res->u.add_sta.status) {
1310         case ADD_STA_SUCCESS_MSK:
1311                 break;
1312         default:
1313                 break;
1314         }
1315
1316         /* We didn't cache the SKB; let the caller free it */
1317         return 1;
1318 }
1319
1320 int iwl_send_add_station(struct iwl_priv *priv,
1321                          struct iwl_addsta_cmd *sta, u8 flags)
1322 {
1323         struct iwl_rx_packet *res = NULL;
1324         int rc = 0;
1325         struct iwl_host_cmd cmd = {
1326                 .id = REPLY_ADD_STA,
1327                 .len = sizeof(struct iwl_addsta_cmd),
1328                 .meta.flags = flags,
1329                 .data = sta,
1330         };
1331
1332         if (flags & CMD_ASYNC)
1333                 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1334         else
1335                 cmd.meta.flags |= CMD_WANT_SKB;
1336
1337         rc = iwl_send_cmd(priv, &cmd);
1338
1339         if (rc || (flags & CMD_ASYNC))
1340                 return rc;
1341
1342         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1343         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1344                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1345                           res->hdr.flags);
1346                 rc = -EIO;
1347         }
1348
1349         if (rc == 0) {
1350                 switch (res->u.add_sta.status) {
1351                 case ADD_STA_SUCCESS_MSK:
1352                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1353                         break;
1354                 default:
1355                         rc = -EIO;
1356                         IWL_WARNING("REPLY_ADD_STA failed\n");
1357                         break;
1358                 }
1359         }
1360
1361         priv->alloc_rxb_skb--;
1362         dev_kfree_skb_any(cmd.meta.u.skb);
1363
1364         return rc;
1365 }
1366
1367 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1368                                    struct ieee80211_key_conf *keyconf,
1369                                    u8 sta_id)
1370 {
1371         unsigned long flags;
1372         __le16 key_flags = 0;
1373
1374         switch (keyconf->alg) {
1375         case ALG_CCMP:
1376                 key_flags |= STA_KEY_FLG_CCMP;
1377                 key_flags |= cpu_to_le16(
1378                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1379                 key_flags &= ~STA_KEY_FLG_INVALID;
1380                 break;
1381         case ALG_TKIP:
1382         case ALG_WEP:
1383         default:
1384                 return -EINVAL;
1385         }
1386         spin_lock_irqsave(&priv->sta_lock, flags);
1387         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1388         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1389         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1390                keyconf->keylen);
1391
1392         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1393                keyconf->keylen);
1394         priv->stations[sta_id].sta.key.key_flags = key_flags;
1395         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1396         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1397
1398         spin_unlock_irqrestore(&priv->sta_lock, flags);
1399
1400         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1401         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1402         return 0;
1403 }
1404
1405 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1406 {
1407         unsigned long flags;
1408
1409         spin_lock_irqsave(&priv->sta_lock, flags);
1410         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1411         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1412         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1413         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1414         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1415         spin_unlock_irqrestore(&priv->sta_lock, flags);
1416
1417         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1418         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1419         return 0;
1420 }
1421
1422 static void iwl_clear_free_frames(struct iwl_priv *priv)
1423 {
1424         struct list_head *element;
1425
1426         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1427                        priv->frames_count);
1428
1429         while (!list_empty(&priv->free_frames)) {
1430                 element = priv->free_frames.next;
1431                 list_del(element);
1432                 kfree(list_entry(element, struct iwl_frame, list));
1433                 priv->frames_count--;
1434         }
1435
1436         if (priv->frames_count) {
1437                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1438                             priv->frames_count);
1439                 priv->frames_count = 0;
1440         }
1441 }
1442
1443 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1444 {
1445         struct iwl_frame *frame;
1446         struct list_head *element;
1447         if (list_empty(&priv->free_frames)) {
1448                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1449                 if (!frame) {
1450                         IWL_ERROR("Could not allocate frame!\n");
1451                         return NULL;
1452                 }
1453
1454                 priv->frames_count++;
1455                 return frame;
1456         }
1457
1458         element = priv->free_frames.next;
1459         list_del(element);
1460         return list_entry(element, struct iwl_frame, list);
1461 }
1462
1463 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1464 {
1465         memset(frame, 0, sizeof(*frame));
1466         list_add(&frame->list, &priv->free_frames);
1467 }
1468
1469 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1470                                 struct ieee80211_hdr *hdr,
1471                                 const u8 *dest, int left)
1472 {
1473
1474         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1475             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1476              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1477                 return 0;
1478
1479         if (priv->ibss_beacon->len > left)
1480                 return 0;
1481
1482         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1483
1484         return priv->ibss_beacon->len;
1485 }
1486
1487 int iwl_rate_index_from_plcp(int plcp)
1488 {
1489         int i = 0;
1490
1491         if (plcp & RATE_MCS_HT_MSK) {
1492                 i = (plcp & 0xff);
1493
1494                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1495                         i = i - IWL_RATE_MIMO_6M_PLCP;
1496
1497                 i += IWL_FIRST_OFDM_RATE;
1498                 /* skip 9M not supported in ht*/
1499                 if (i >= IWL_RATE_9M_INDEX)
1500                         i += 1;
1501                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1502                     (i <= IWL_LAST_OFDM_RATE))
1503                         return i;
1504         } else {
1505                 for (i = 0; i < ARRAY_SIZE(iwl_rates); i++)
1506                         if (iwl_rates[i].plcp == (plcp &0xFF))
1507                                 return i;
1508         }
1509         return -1;
1510 }
1511
1512 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1513 {
1514         u8 i;
1515
1516         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1517              i = iwl_rates[i].next_ieee) {
1518                 if (rate_mask & (1 << i))
1519                         return iwl_rates[i].plcp;
1520         }
1521
1522         return IWL_RATE_INVALID;
1523 }
1524
1525 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1526 {
1527         struct iwl_frame *frame;
1528         unsigned int frame_size;
1529         int rc;
1530         u8 rate;
1531
1532         frame = iwl_get_free_frame(priv);
1533
1534         if (!frame) {
1535                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1536                           "command.\n");
1537                 return -ENOMEM;
1538         }
1539
1540         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1541                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1542                                                 0xFF0);
1543                 if (rate == IWL_INVALID_RATE)
1544                         rate = IWL_RATE_6M_PLCP;
1545         } else {
1546                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1547                 if (rate == IWL_INVALID_RATE)
1548                         rate = IWL_RATE_1M_PLCP;
1549         }
1550
1551         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1552
1553         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1554                               &frame->u.cmd[0]);
1555
1556         iwl_free_frame(priv, frame);
1557
1558         return rc;
1559 }
1560
1561 /******************************************************************************
1562  *
1563  * EEPROM related functions
1564  *
1565  ******************************************************************************/
1566
1567 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1568 {
1569         memcpy(mac, priv->eeprom.mac_address, 6);
1570 }
1571
1572 /**
1573  * iwl_eeprom_init - read EEPROM contents
1574  *
1575  * Load the EEPROM from adapter into priv->eeprom
1576  *
1577  * NOTE:  This routine uses the non-debug IO access functions.
1578  */
1579 int iwl_eeprom_init(struct iwl_priv *priv)
1580 {
1581         u16 *e = (u16 *)&priv->eeprom;
1582         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1583         u32 r;
1584         int sz = sizeof(priv->eeprom);
1585         int rc;
1586         int i;
1587         u16 addr;
1588
1589         /* The EEPROM structure has several padding buffers within it
1590          * and when adding new EEPROM maps is subject to programmer errors
1591          * which may be very difficult to identify without explicitly
1592          * checking the resulting size of the eeprom map. */
1593         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1594
1595         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1596                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1597                 return -ENOENT;
1598         }
1599
1600         rc = iwl_eeprom_acquire_semaphore(priv);
1601         if (rc < 0) {
1602                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1603                 return -ENOENT;
1604         }
1605
1606         /* eeprom is an array of 16bit values */
1607         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1608                 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1609                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1610
1611                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1612                                         i += IWL_EEPROM_ACCESS_DELAY) {
1613                         r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
1614                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1615                                 break;
1616                         udelay(IWL_EEPROM_ACCESS_DELAY);
1617                 }
1618
1619                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1620                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1621                         rc = -ETIMEDOUT;
1622                         goto done;
1623                 }
1624                 e[addr / 2] = le16_to_cpu(r >> 16);
1625         }
1626         rc = 0;
1627
1628 done:
1629         iwl_eeprom_release_semaphore(priv);
1630         return rc;
1631 }
1632
1633 /******************************************************************************
1634  *
1635  * Misc. internal state and helper functions
1636  *
1637  ******************************************************************************/
1638 #ifdef CONFIG_IWLWIFI_DEBUG
1639
1640 /**
1641  * iwl_report_frame - dump frame to syslog during debug sessions
1642  *
1643  * hack this function to show different aspects of received frames,
1644  * including selective frame dumps.
1645  * group100 parameter selects whether to show 1 out of 100 good frames.
1646  *
1647  * TODO:  ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1648  *        info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1649  *        is 3945-specific and gives bad output for 4965.  Need to split the
1650  *        functionality, keep common stuff here.
1651  */
1652 void iwl_report_frame(struct iwl_priv *priv,
1653                       struct iwl_rx_packet *pkt,
1654                       struct ieee80211_hdr *header, int group100)
1655 {
1656         u32 to_us;
1657         u32 print_summary = 0;
1658         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1659         u32 hundred = 0;
1660         u32 dataframe = 0;
1661         u16 fc;
1662         u16 seq_ctl;
1663         u16 channel;
1664         u16 phy_flags;
1665         int rate_sym;
1666         u16 length;
1667         u16 status;
1668         u16 bcn_tmr;
1669         u32 tsf_low;
1670         u64 tsf;
1671         u8 rssi;
1672         u8 agc;
1673         u16 sig_avg;
1674         u16 noise_diff;
1675         struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1676         struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1677         struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1678         u8 *data = IWL_RX_DATA(pkt);
1679
1680         /* MAC header */
1681         fc = le16_to_cpu(header->frame_control);
1682         seq_ctl = le16_to_cpu(header->seq_ctrl);
1683
1684         /* metadata */
1685         channel = le16_to_cpu(rx_hdr->channel);
1686         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1687         rate_sym = rx_hdr->rate;
1688         length = le16_to_cpu(rx_hdr->len);
1689
1690         /* end-of-frame status and timestamp */
1691         status = le32_to_cpu(rx_end->status);
1692         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1693         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1694         tsf = le64_to_cpu(rx_end->timestamp);
1695
1696         /* signal statistics */
1697         rssi = rx_stats->rssi;
1698         agc = rx_stats->agc;
1699         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1700         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1701
1702         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1703
1704         /* if data frame is to us and all is good,
1705          *   (optionally) print summary for only 1 out of every 100 */
1706         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1707             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1708                 dataframe = 1;
1709                 if (!group100)
1710                         print_summary = 1;      /* print each frame */
1711                 else if (priv->framecnt_to_us < 100) {
1712                         priv->framecnt_to_us++;
1713                         print_summary = 0;
1714                 } else {
1715                         priv->framecnt_to_us = 0;
1716                         print_summary = 1;
1717                         hundred = 1;
1718                 }
1719         } else {
1720                 /* print summary for all other frames */
1721                 print_summary = 1;
1722         }
1723
1724         if (print_summary) {
1725                 char *title;
1726                 u32 rate;
1727
1728                 if (hundred)
1729                         title = "100Frames";
1730                 else if (fc & IEEE80211_FCTL_RETRY)
1731                         title = "Retry";
1732                 else if (ieee80211_is_assoc_response(fc))
1733                         title = "AscRsp";
1734                 else if (ieee80211_is_reassoc_response(fc))
1735                         title = "RasRsp";
1736                 else if (ieee80211_is_probe_response(fc)) {
1737                         title = "PrbRsp";
1738                         print_dump = 1; /* dump frame contents */
1739                 } else if (ieee80211_is_beacon(fc)) {
1740                         title = "Beacon";
1741                         print_dump = 1; /* dump frame contents */
1742                 } else if (ieee80211_is_atim(fc))
1743                         title = "ATIM";
1744                 else if (ieee80211_is_auth(fc))
1745                         title = "Auth";
1746                 else if (ieee80211_is_deauth(fc))
1747                         title = "DeAuth";
1748                 else if (ieee80211_is_disassoc(fc))
1749                         title = "DisAssoc";
1750                 else
1751                         title = "Frame";
1752
1753                 rate = iwl_rate_index_from_plcp(rate_sym);
1754                 if (rate == -1)
1755                         rate = 0;
1756                 else
1757                         rate = iwl_rates[rate].ieee / 2;
1758
1759                 /* print frame summary.
1760                  * MAC addresses show just the last byte (for brevity),
1761                  *    but you can hack it to show more, if you'd like to. */
1762                 if (dataframe)
1763                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1764                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1765                                      title, fc, header->addr1[5],
1766                                      length, rssi, channel, rate);
1767                 else {
1768                         /* src/dst addresses assume managed mode */
1769                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1770                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1771                                      "phy=0x%02x, chnl=%d\n",
1772                                      title, fc, header->addr1[5],
1773                                      header->addr3[5], rssi,
1774                                      tsf_low - priv->scan_start_tsf,
1775                                      phy_flags, channel);
1776                 }
1777         }
1778         if (print_dump)
1779                 iwl_print_hex_dump(IWL_DL_RX, data, length);
1780 }
1781 #endif
1782
1783 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1784 {
1785         if (priv->hw_setting.shared_virt)
1786                 pci_free_consistent(priv->pci_dev,
1787                                     sizeof(struct iwl_shared),
1788                                     priv->hw_setting.shared_virt,
1789                                     priv->hw_setting.shared_phys);
1790 }
1791
1792 /**
1793  * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1794  *
1795  * return : set the bit for each supported rate insert in ie
1796  */
1797 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1798                                     u16 basic_rate, int *left)
1799 {
1800         u16 ret_rates = 0, bit;
1801         int i;
1802         u8 *cnt = ie;
1803         u8 *rates = ie + 1;
1804
1805         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1806                 if (bit & supported_rate) {
1807                         ret_rates |= bit;
1808                         rates[*cnt] = iwl_rates[i].ieee |
1809                                 ((bit & basic_rate) ? 0x80 : 0x00);
1810                         (*cnt)++;
1811                         (*left)--;
1812                         if ((*left <= 0) ||
1813                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1814                                 break;
1815                 }
1816         }
1817
1818         return ret_rates;
1819 }
1820
1821 #ifdef CONFIG_IWLWIFI_HT
1822 void static iwl_set_ht_capab(struct ieee80211_hw *hw,
1823                              struct ieee80211_ht_capability *ht_cap,
1824                              u8 use_wide_chan);
1825 #endif
1826
1827 /**
1828  * iwl_fill_probe_req - fill in all required fields and IE for probe request
1829  */
1830 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1831                               struct ieee80211_mgmt *frame,
1832                               int left, int is_direct)
1833 {
1834         int len = 0;
1835         u8 *pos = NULL;
1836         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1837
1838         /* Make sure there is enough space for the probe request,
1839          * two mandatory IEs and the data */
1840         left -= 24;
1841         if (left < 0)
1842                 return 0;
1843         len += 24;
1844
1845         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1846         memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1847         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1848         memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1849         frame->seq_ctrl = 0;
1850
1851         /* fill in our indirect SSID IE */
1852         /* ...next IE... */
1853
1854         left -= 2;
1855         if (left < 0)
1856                 return 0;
1857         len += 2;
1858         pos = &(frame->u.probe_req.variable[0]);
1859         *pos++ = WLAN_EID_SSID;
1860         *pos++ = 0;
1861
1862         /* fill in our direct SSID IE... */
1863         if (is_direct) {
1864                 /* ...next IE... */
1865                 left -= 2 + priv->essid_len;
1866                 if (left < 0)
1867                         return 0;
1868                 /* ... fill it in... */
1869                 *pos++ = WLAN_EID_SSID;
1870                 *pos++ = priv->essid_len;
1871                 memcpy(pos, priv->essid, priv->essid_len);
1872                 pos += priv->essid_len;
1873                 len += 2 + priv->essid_len;
1874         }
1875
1876         /* fill in supported rate */
1877         /* ...next IE... */
1878         left -= 2;
1879         if (left < 0)
1880                 return 0;
1881
1882         /* ... fill it in... */
1883         *pos++ = WLAN_EID_SUPP_RATES;
1884         *pos = 0;
1885
1886         /* exclude 60M rate */
1887         active_rates = priv->rates_mask;
1888         active_rates &= ~IWL_RATE_60M_MASK;
1889
1890         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1891
1892         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1893         ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
1894                         active_rate_basic, &left);
1895         active_rates &= ~ret_rates;
1896
1897         ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
1898                                  active_rate_basic, &left);
1899         active_rates &= ~ret_rates;
1900
1901         len += 2 + *pos;
1902         pos += (*pos) + 1;
1903         if (active_rates == 0)
1904                 goto fill_end;
1905
1906         /* fill in supported extended rate */
1907         /* ...next IE... */
1908         left -= 2;
1909         if (left < 0)
1910                 return 0;
1911         /* ... fill it in... */
1912         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1913         *pos = 0;
1914         iwl_supported_rate_to_ie(pos, active_rates,
1915                                  active_rate_basic, &left);
1916         if (*pos > 0)
1917                 len += 2 + *pos;
1918
1919 #ifdef CONFIG_IWLWIFI_HT
1920         if (is_direct && priv->is_ht_enabled) {
1921                 u8 use_wide_chan = 1;
1922
1923                 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
1924                         use_wide_chan = 0;
1925                 pos += (*pos) + 1;
1926                 *pos++ = WLAN_EID_HT_CAPABILITY;
1927                 *pos++ = sizeof(struct ieee80211_ht_capability);
1928                 iwl_set_ht_capab(NULL, (struct ieee80211_ht_capability *)pos,
1929                                  use_wide_chan);
1930                 len += 2 + sizeof(struct ieee80211_ht_capability);
1931         }
1932 #endif  /*CONFIG_IWLWIFI_HT */
1933
1934  fill_end:
1935         return (u16)len;
1936 }
1937
1938 /*
1939  * QoS  support
1940 */
1941 #ifdef CONFIG_IWLWIFI_QOS
1942 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1943                                        struct iwl_qosparam_cmd *qos)
1944 {
1945
1946         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1947                                 sizeof(struct iwl_qosparam_cmd), qos);
1948 }
1949
1950 static void iwl_reset_qos(struct iwl_priv *priv)
1951 {
1952         u16 cw_min = 15;
1953         u16 cw_max = 1023;
1954         u8 aifs = 2;
1955         u8 is_legacy = 0;
1956         unsigned long flags;
1957         int i;
1958
1959         spin_lock_irqsave(&priv->lock, flags);
1960         priv->qos_data.qos_active = 0;
1961
1962         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1963                 if (priv->qos_data.qos_enable)
1964                         priv->qos_data.qos_active = 1;
1965                 if (!(priv->active_rate & 0xfff0)) {
1966                         cw_min = 31;
1967                         is_legacy = 1;
1968                 }
1969         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1970                 if (priv->qos_data.qos_enable)
1971                         priv->qos_data.qos_active = 1;
1972         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1973                 cw_min = 31;
1974                 is_legacy = 1;
1975         }
1976
1977         if (priv->qos_data.qos_active)
1978                 aifs = 3;
1979
1980         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1981         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1982         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1983         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1984         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1985
1986         if (priv->qos_data.qos_active) {
1987                 i = 1;
1988                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1989                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1990                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1991                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1992                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1993
1994                 i = 2;
1995                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1996                         cpu_to_le16((cw_min + 1) / 2 - 1);
1997                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1998                         cpu_to_le16(cw_max);
1999                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2000                 if (is_legacy)
2001                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2002                                 cpu_to_le16(6016);
2003                 else
2004                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2005                                 cpu_to_le16(3008);
2006                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2007
2008                 i = 3;
2009                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2010                         cpu_to_le16((cw_min + 1) / 4 - 1);
2011                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2012                         cpu_to_le16((cw_max + 1) / 2 - 1);
2013                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2014                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2015                 if (is_legacy)
2016                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2017                                 cpu_to_le16(3264);
2018                 else
2019                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2020                                 cpu_to_le16(1504);
2021         } else {
2022                 for (i = 1; i < 4; i++) {
2023                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2024                                 cpu_to_le16(cw_min);
2025                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2026                                 cpu_to_le16(cw_max);
2027                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2028                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2029                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2030                 }
2031         }
2032         IWL_DEBUG_QOS("set QoS to default \n");
2033
2034         spin_unlock_irqrestore(&priv->lock, flags);
2035 }
2036
2037 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
2038 {
2039         unsigned long flags;
2040
2041         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2042                 return;
2043
2044         if (!priv->qos_data.qos_enable)
2045                 return;
2046
2047         spin_lock_irqsave(&priv->lock, flags);
2048         priv->qos_data.def_qos_parm.qos_flags = 0;
2049
2050         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2051             !priv->qos_data.qos_cap.q_AP.txop_request)
2052                 priv->qos_data.def_qos_parm.qos_flags |=
2053                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2054         if (priv->qos_data.qos_active)
2055                 priv->qos_data.def_qos_parm.qos_flags |=
2056                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2057
2058 #ifdef CONFIG_IWLWIFI_HT
2059         if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
2060                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2061 #endif /* CONFIG_IWLWIFI_HT */
2062
2063         spin_unlock_irqrestore(&priv->lock, flags);
2064
2065         if (force || iwl_is_associated(priv)) {
2066                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2067                                 priv->qos_data.qos_active,
2068                                 priv->qos_data.def_qos_parm.qos_flags);
2069
2070                 iwl_send_qos_params_command(priv,
2071                                 &(priv->qos_data.def_qos_parm));
2072         }
2073 }
2074
2075 #endif /* CONFIG_IWLWIFI_QOS */
2076 /*
2077  * Power management (not Tx power!) functions
2078  */
2079 #define MSEC_TO_USEC 1024
2080
2081 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2082 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2083 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2084 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2085                                      __constant_cpu_to_le32(X1), \
2086                                      __constant_cpu_to_le32(X2), \
2087                                      __constant_cpu_to_le32(X3), \
2088                                      __constant_cpu_to_le32(X4)}
2089
2090
2091 /* default power management (not Tx power) table values */
2092 /* for tim  0-10 */
2093 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2094         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2095         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2096         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2097         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2098         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2099         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2100 };
2101
2102 /* for tim > 10 */
2103 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2104         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2105         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2106                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2107         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2108                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2109         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2110                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2111         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2112         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2113                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2114 };
2115
2116 int iwl_power_init_handle(struct iwl_priv *priv)
2117 {
2118         int rc = 0, i;
2119         struct iwl_power_mgr *pow_data;
2120         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2121         u16 pci_pm;
2122
2123         IWL_DEBUG_POWER("Initialize power \n");
2124
2125         pow_data = &(priv->power_data);
2126
2127         memset(pow_data, 0, sizeof(*pow_data));
2128
2129         pow_data->active_index = IWL_POWER_RANGE_0;
2130         pow_data->dtim_val = 0xffff;
2131
2132         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2133         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2134
2135         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2136         if (rc != 0)
2137                 return 0;
2138         else {
2139                 struct iwl_powertable_cmd *cmd;
2140
2141                 IWL_DEBUG_POWER("adjust power command flags\n");
2142
2143                 for (i = 0; i < IWL_POWER_AC; i++) {
2144                         cmd = &pow_data->pwr_range_0[i].cmd;
2145
2146                         if (pci_pm & 0x1)
2147                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2148                         else
2149                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2150                 }
2151         }
2152         return rc;
2153 }
2154
2155 static int iwl_update_power_cmd(struct iwl_priv *priv,
2156                                 struct iwl_powertable_cmd *cmd, u32 mode)
2157 {
2158         int rc = 0, i;
2159         u8 skip;
2160         u32 max_sleep = 0;
2161         struct iwl_power_vec_entry *range;
2162         u8 period = 0;
2163         struct iwl_power_mgr *pow_data;
2164
2165         if (mode > IWL_POWER_INDEX_5) {
2166                 IWL_DEBUG_POWER("Error invalid power mode \n");
2167                 return -1;
2168         }
2169         pow_data = &(priv->power_data);
2170
2171         if (pow_data->active_index == IWL_POWER_RANGE_0)
2172                 range = &pow_data->pwr_range_0[0];
2173         else
2174                 range = &pow_data->pwr_range_1[1];
2175
2176         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2177
2178 #ifdef IWL_MAC80211_DISABLE
2179         if (priv->assoc_network != NULL) {
2180                 unsigned long flags;
2181
2182                 period = priv->assoc_network->tim.tim_period;
2183         }
2184 #endif  /*IWL_MAC80211_DISABLE */
2185         skip = range[mode].no_dtim;
2186
2187         if (period == 0) {
2188                 period = 1;
2189                 skip = 0;
2190         }
2191
2192         if (skip == 0) {
2193                 max_sleep = period;
2194                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2195         } else {
2196                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2197                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2198                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2199         }
2200
2201         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2202                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2203                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2204         }
2205
2206         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2207         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2208         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2209         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2210                         le32_to_cpu(cmd->sleep_interval[0]),
2211                         le32_to_cpu(cmd->sleep_interval[1]),
2212                         le32_to_cpu(cmd->sleep_interval[2]),
2213                         le32_to_cpu(cmd->sleep_interval[3]),
2214                         le32_to_cpu(cmd->sleep_interval[4]));
2215
2216         return rc;
2217 }
2218
2219 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2220 {
2221         u32 final_mode = mode;
2222         int rc;
2223         struct iwl_powertable_cmd cmd;
2224
2225         /* If on battery, set to 3,
2226          * if plugged into AC power, set to CAM ("continuously aware mode"),
2227          * else user level */
2228         switch (mode) {
2229         case IWL_POWER_BATTERY:
2230                 final_mode = IWL_POWER_INDEX_3;
2231                 break;
2232         case IWL_POWER_AC:
2233                 final_mode = IWL_POWER_MODE_CAM;
2234                 break;
2235         default:
2236                 final_mode = mode;
2237                 break;
2238         }
2239
2240         cmd.keep_alive_beacons = 0;
2241
2242         iwl_update_power_cmd(priv, &cmd, final_mode);
2243
2244         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2245
2246         if (final_mode == IWL_POWER_MODE_CAM)
2247                 clear_bit(STATUS_POWER_PMI, &priv->status);
2248         else
2249                 set_bit(STATUS_POWER_PMI, &priv->status);
2250
2251         return rc;
2252 }
2253
2254 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2255 {
2256         /* Filter incoming packets to determine if they are targeted toward
2257          * this network, discarding packets coming from ourselves */
2258         switch (priv->iw_mode) {
2259         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2260                 /* packets from our adapter are dropped (echo) */
2261                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2262                         return 0;
2263                 /* {broad,multi}cast packets to our IBSS go through */
2264                 if (is_multicast_ether_addr(header->addr1))
2265                         return !compare_ether_addr(header->addr3, priv->bssid);
2266                 /* packets to our adapter go through */
2267                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2268         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2269                 /* packets from our adapter are dropped (echo) */
2270                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2271                         return 0;
2272                 /* {broad,multi}cast packets to our BSS go through */
2273                 if (is_multicast_ether_addr(header->addr1))
2274                         return !compare_ether_addr(header->addr2, priv->bssid);
2275                 /* packets to our adapter go through */
2276                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2277         }
2278
2279         return 1;
2280 }
2281
2282 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2283
2284 const char *iwl_get_tx_fail_reason(u32 status)
2285 {
2286         switch (status & TX_STATUS_MSK) {
2287         case TX_STATUS_SUCCESS:
2288                 return "SUCCESS";
2289                 TX_STATUS_ENTRY(SHORT_LIMIT);
2290                 TX_STATUS_ENTRY(LONG_LIMIT);
2291                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2292                 TX_STATUS_ENTRY(MGMNT_ABORT);
2293                 TX_STATUS_ENTRY(NEXT_FRAG);
2294                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2295                 TX_STATUS_ENTRY(DEST_PS);
2296                 TX_STATUS_ENTRY(ABORTED);
2297                 TX_STATUS_ENTRY(BT_RETRY);
2298                 TX_STATUS_ENTRY(STA_INVALID);
2299                 TX_STATUS_ENTRY(FRAG_DROPPED);
2300                 TX_STATUS_ENTRY(TID_DISABLE);
2301                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2302                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2303                 TX_STATUS_ENTRY(TX_LOCKED);
2304                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2305         }
2306
2307         return "UNKNOWN";
2308 }
2309
2310 /**
2311  * iwl_scan_cancel - Cancel any currently executing HW scan
2312  *
2313  * NOTE: priv->mutex is not required before calling this function
2314  */
2315 static int iwl_scan_cancel(struct iwl_priv *priv)
2316 {
2317         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2318                 clear_bit(STATUS_SCANNING, &priv->status);
2319                 return 0;
2320         }
2321
2322         if (test_bit(STATUS_SCANNING, &priv->status)) {
2323                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2324                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2325                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2326                         queue_work(priv->workqueue, &priv->abort_scan);
2327
2328                 } else
2329                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2330
2331                 return test_bit(STATUS_SCANNING, &priv->status);
2332         }
2333
2334         return 0;
2335 }
2336
2337 /**
2338  * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2339  * @ms: amount of time to wait (in milliseconds) for scan to abort
2340  *
2341  * NOTE: priv->mutex must be held before calling this function
2342  */
2343 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2344 {
2345         unsigned long now = jiffies;
2346         int ret;
2347
2348         ret = iwl_scan_cancel(priv);
2349         if (ret && ms) {
2350                 mutex_unlock(&priv->mutex);
2351                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2352                                 test_bit(STATUS_SCANNING, &priv->status))
2353                         msleep(1);
2354                 mutex_lock(&priv->mutex);
2355
2356                 return test_bit(STATUS_SCANNING, &priv->status);
2357         }
2358
2359         return ret;
2360 }
2361
2362 static void iwl_sequence_reset(struct iwl_priv *priv)
2363 {
2364         /* Reset ieee stats */
2365
2366         /* We don't reset the net_device_stats (ieee->stats) on
2367          * re-association */
2368
2369         priv->last_seq_num = -1;
2370         priv->last_frag_num = -1;
2371         priv->last_packet_time = 0;
2372
2373         iwl_scan_cancel(priv);
2374 }
2375
2376 #define MAX_UCODE_BEACON_INTERVAL       4096
2377 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2378
2379 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2380 {
2381         u16 new_val = 0;
2382         u16 beacon_factor = 0;
2383
2384         beacon_factor =
2385             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2386                 / MAX_UCODE_BEACON_INTERVAL;
2387         new_val = beacon_val / beacon_factor;
2388
2389         return cpu_to_le16(new_val);
2390 }
2391
2392 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2393 {
2394         u64 interval_tm_unit;
2395         u64 tsf, result;
2396         unsigned long flags;
2397         struct ieee80211_conf *conf = NULL;
2398         u16 beacon_int = 0;
2399
2400         conf = ieee80211_get_hw_conf(priv->hw);
2401
2402         spin_lock_irqsave(&priv->lock, flags);
2403         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2404         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2405
2406         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2407
2408         tsf = priv->timestamp1;
2409         tsf = ((tsf << 32) | priv->timestamp0);
2410
2411         beacon_int = priv->beacon_int;
2412         spin_unlock_irqrestore(&priv->lock, flags);
2413
2414         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2415                 if (beacon_int == 0) {
2416                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2417                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2418                 } else {
2419                         priv->rxon_timing.beacon_interval =
2420                                 cpu_to_le16(beacon_int);
2421                         priv->rxon_timing.beacon_interval =
2422                             iwl_adjust_beacon_interval(
2423                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2424                 }
2425
2426                 priv->rxon_timing.atim_window = 0;
2427         } else {
2428                 priv->rxon_timing.beacon_interval =
2429                         iwl_adjust_beacon_interval(conf->beacon_int);
2430                 /* TODO: we need to get atim_window from upper stack
2431                  * for now we set to 0 */
2432                 priv->rxon_timing.atim_window = 0;
2433         }
2434
2435         interval_tm_unit =
2436                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2437         result = do_div(tsf, interval_tm_unit);
2438         priv->rxon_timing.beacon_init_val =
2439             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2440
2441         IWL_DEBUG_ASSOC
2442             ("beacon interval %d beacon timer %d beacon tim %d\n",
2443                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2444                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2445                 le16_to_cpu(priv->rxon_timing.atim_window));
2446 }
2447
2448 static int iwl_scan_initiate(struct iwl_priv *priv)
2449 {
2450         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2451                 IWL_ERROR("APs don't scan.\n");
2452                 return 0;
2453         }
2454
2455         if (!iwl_is_ready_rf(priv)) {
2456                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2457                 return -EIO;
2458         }
2459
2460         if (test_bit(STATUS_SCANNING, &priv->status)) {
2461                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2462                 return -EAGAIN;
2463         }
2464
2465         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2466                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2467                                "Queuing.\n");
2468                 return -EAGAIN;
2469         }
2470
2471         IWL_DEBUG_INFO("Starting scan...\n");
2472         priv->scan_bands = 2;
2473         set_bit(STATUS_SCANNING, &priv->status);
2474         priv->scan_start = jiffies;
2475         priv->scan_pass_start = priv->scan_start;
2476
2477         queue_work(priv->workqueue, &priv->request_scan);
2478
2479         return 0;
2480 }
2481
2482 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2483 {
2484         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2485
2486         if (hw_decrypt)
2487                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2488         else
2489                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2490
2491         return 0;
2492 }
2493
2494 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2495 {
2496         if (phymode == MODE_IEEE80211A) {
2497                 priv->staging_rxon.flags &=
2498                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2499                       | RXON_FLG_CCK_MSK);
2500                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2501         } else {
2502                 /* Copied from iwl_bg_post_associate() */
2503                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2504                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2505                 else
2506                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2507
2508                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2509                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2510
2511                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2512                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2513                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2514         }
2515 }
2516
2517 /*
2518  * initialize rxon structure with default values from eeprom
2519  */
2520 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2521 {
2522         const struct iwl_channel_info *ch_info;
2523
2524         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2525
2526         switch (priv->iw_mode) {
2527         case IEEE80211_IF_TYPE_AP:
2528                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2529                 break;
2530
2531         case IEEE80211_IF_TYPE_STA:
2532                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2533                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2534                 break;
2535
2536         case IEEE80211_IF_TYPE_IBSS:
2537                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2538                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2539                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2540                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2541                 break;
2542
2543         case IEEE80211_IF_TYPE_MNTR:
2544                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2545                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2546                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2547                 break;
2548         }
2549
2550 #if 0
2551         /* TODO:  Figure out when short_preamble would be set and cache from
2552          * that */
2553         if (!hw_to_local(priv->hw)->short_preamble)
2554                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2555         else
2556                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2557 #endif
2558
2559         ch_info = iwl_get_channel_info(priv, priv->phymode,
2560                                        le16_to_cpu(priv->staging_rxon.channel));
2561
2562         if (!ch_info)
2563                 ch_info = &priv->channel_info[0];
2564
2565         /*
2566          * in some case A channels are all non IBSS
2567          * in this case force B/G channel
2568          */
2569         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2570             !(is_channel_ibss(ch_info)))
2571                 ch_info = &priv->channel_info[0];
2572
2573         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2574         if (is_channel_a_band(ch_info))
2575                 priv->phymode = MODE_IEEE80211A;
2576         else
2577                 priv->phymode = MODE_IEEE80211G;
2578
2579         iwl_set_flags_for_phymode(priv, priv->phymode);
2580
2581         priv->staging_rxon.ofdm_basic_rates =
2582             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2583         priv->staging_rxon.cck_basic_rates =
2584             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2585
2586         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2587                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2588         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2589         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2590         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2591         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2592         iwl4965_set_rxon_chain(priv);
2593 }
2594
2595 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2596 {
2597         if (!iwl_is_ready_rf(priv))
2598                 return -EAGAIN;
2599
2600         if (mode == IEEE80211_IF_TYPE_IBSS) {
2601                 const struct iwl_channel_info *ch_info;
2602
2603                 ch_info = iwl_get_channel_info(priv,
2604                         priv->phymode,
2605                         le16_to_cpu(priv->staging_rxon.channel));
2606
2607                 if (!ch_info || !is_channel_ibss(ch_info)) {
2608                         IWL_ERROR("channel %d not IBSS channel\n",
2609                                   le16_to_cpu(priv->staging_rxon.channel));
2610                         return -EINVAL;
2611                 }
2612         }
2613
2614         cancel_delayed_work(&priv->scan_check);
2615         if (iwl_scan_cancel_timeout(priv, 100)) {
2616                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2617                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2618                 return -EAGAIN;
2619         }
2620
2621         priv->iw_mode = mode;
2622
2623         iwl_connection_init_rx_config(priv);
2624         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2625
2626         iwl_clear_stations_table(priv);
2627
2628         iwl_commit_rxon(priv);
2629
2630         return 0;
2631 }
2632
2633 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2634                                       struct ieee80211_tx_control *ctl,
2635                                       struct iwl_cmd *cmd,
2636                                       struct sk_buff *skb_frag,
2637                                       int last_frag)
2638 {
2639         struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2640
2641         switch (keyinfo->alg) {
2642         case ALG_CCMP:
2643                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2644                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2645                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2646                 break;
2647
2648         case ALG_TKIP:
2649 #if 0
2650                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2651
2652                 if (last_frag)
2653                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2654                                8);
2655                 else
2656                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2657 #endif
2658                 break;
2659
2660         case ALG_WEP:
2661                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2662                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2663
2664                 if (keyinfo->keylen == 13)
2665                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2666
2667                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2668
2669                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2670                              "with key %d\n", ctl->key_idx);
2671                 break;
2672
2673         default:
2674                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2675                 break;
2676         }
2677 }
2678
2679 /*
2680  * handle build REPLY_TX command notification.
2681  */
2682 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2683                                   struct iwl_cmd *cmd,
2684                                   struct ieee80211_tx_control *ctrl,
2685                                   struct ieee80211_hdr *hdr,
2686                                   int is_unicast, u8 std_id)
2687 {
2688         __le16 *qc;
2689         u16 fc = le16_to_cpu(hdr->frame_control);
2690         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2691
2692         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2693         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2694                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2695                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2696                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2697                 if (ieee80211_is_probe_response(fc) &&
2698                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2699                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2700         } else {
2701                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2702                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2703         }
2704
2705         cmd->cmd.tx.sta_id = std_id;
2706         if (ieee80211_get_morefrag(hdr))
2707                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2708
2709         qc = ieee80211_get_qos_ctrl(hdr);
2710         if (qc) {
2711                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2712                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2713         } else
2714                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2715
2716         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2717                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2718                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2719         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2720                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2721                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2722         }
2723
2724         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2725                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2726
2727         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2728         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2729                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2730                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2731                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2732                 else
2733                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2734         } else
2735                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2736
2737         cmd->cmd.tx.driver_txop = 0;
2738         cmd->cmd.tx.tx_flags = tx_flags;
2739         cmd->cmd.tx.next_frame_len = 0;
2740 }
2741
2742 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2743 {
2744         int sta_id;
2745         u16 fc = le16_to_cpu(hdr->frame_control);
2746         DECLARE_MAC_BUF(mac);
2747
2748         /* If this frame is broadcast or not data then use the broadcast
2749          * station id */
2750         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2751             is_multicast_ether_addr(hdr->addr1))
2752                 return priv->hw_setting.bcast_sta_id;
2753
2754         switch (priv->iw_mode) {
2755
2756         /* If this frame is part of a BSS network (we're a station), then
2757          * we use the AP's station id */
2758         case IEEE80211_IF_TYPE_STA:
2759                 return IWL_AP_ID;
2760
2761         /* If we are an AP, then find the station, or use BCAST */
2762         case IEEE80211_IF_TYPE_AP:
2763                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2764                 if (sta_id != IWL_INVALID_STATION)
2765                         return sta_id;
2766                 return priv->hw_setting.bcast_sta_id;
2767
2768         /* If this frame is part of a IBSS network, then we use the
2769          * target specific station id */
2770         case IEEE80211_IF_TYPE_IBSS:
2771                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2772                 if (sta_id != IWL_INVALID_STATION)
2773                         return sta_id;
2774
2775                 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2776
2777                 if (sta_id != IWL_INVALID_STATION)
2778                         return sta_id;
2779
2780                 IWL_DEBUG_DROP("Station %s not in station map. "
2781                                "Defaulting to broadcast...\n",
2782                                print_mac(mac, hdr->addr1));
2783                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2784                 return priv->hw_setting.bcast_sta_id;
2785
2786         default:
2787                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2788                 return priv->hw_setting.bcast_sta_id;
2789         }
2790 }
2791
2792 /*
2793  * start REPLY_TX command process
2794  */
2795 static int iwl_tx_skb(struct iwl_priv *priv,
2796                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2797 {
2798         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2799         struct iwl_tfd_frame *tfd;
2800         u32 *control_flags;
2801         int txq_id = ctl->queue;
2802         struct iwl_tx_queue *txq = NULL;
2803         struct iwl_queue *q = NULL;
2804         dma_addr_t phys_addr;
2805         dma_addr_t txcmd_phys;
2806         struct iwl_cmd *out_cmd = NULL;
2807         u16 len, idx, len_org;
2808         u8 id, hdr_len, unicast;
2809         u8 sta_id;
2810         u16 seq_number = 0;
2811         u16 fc;
2812         __le16 *qc;
2813         u8 wait_write_ptr = 0;
2814         unsigned long flags;
2815         int rc;
2816
2817         spin_lock_irqsave(&priv->lock, flags);
2818         if (iwl_is_rfkill(priv)) {
2819                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2820                 goto drop_unlock;
2821         }
2822
2823         if (!priv->interface_id) {
2824                 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2825                 goto drop_unlock;
2826         }
2827
2828         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2829                 IWL_ERROR("ERROR: No TX rate available.\n");
2830                 goto drop_unlock;
2831         }
2832
2833         unicast = !is_multicast_ether_addr(hdr->addr1);
2834         id = 0;
2835
2836         fc = le16_to_cpu(hdr->frame_control);
2837
2838 #ifdef CONFIG_IWLWIFI_DEBUG
2839         if (ieee80211_is_auth(fc))
2840                 IWL_DEBUG_TX("Sending AUTH frame\n");
2841         else if (ieee80211_is_assoc_request(fc))
2842                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2843         else if (ieee80211_is_reassoc_request(fc))
2844                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2845 #endif
2846
2847         if (!iwl_is_associated(priv) &&
2848             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2849                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2850                 goto drop_unlock;
2851         }
2852
2853         spin_unlock_irqrestore(&priv->lock, flags);
2854
2855         hdr_len = ieee80211_get_hdrlen(fc);
2856         sta_id = iwl_get_sta_id(priv, hdr);
2857         if (sta_id == IWL_INVALID_STATION) {
2858                 DECLARE_MAC_BUF(mac);
2859
2860                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2861                                print_mac(mac, hdr->addr1));
2862                 goto drop;
2863         }
2864
2865         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2866
2867         qc = ieee80211_get_qos_ctrl(hdr);
2868         if (qc) {
2869                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2870                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2871                                 IEEE80211_SCTL_SEQ;
2872                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2873                         (hdr->seq_ctrl &
2874                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2875                 seq_number += 0x10;
2876 #ifdef CONFIG_IWLWIFI_HT
2877 #ifdef CONFIG_IWLWIFI_HT_AGG
2878                 /* aggregation is on for this <sta,tid> */
2879                 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2880                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2881 #endif /* CONFIG_IWLWIFI_HT_AGG */
2882 #endif /* CONFIG_IWLWIFI_HT */
2883         }
2884         txq = &priv->txq[txq_id];
2885         q = &txq->q;
2886
2887         spin_lock_irqsave(&priv->lock, flags);
2888
2889         tfd = &txq->bd[q->write_ptr];
2890         memset(tfd, 0, sizeof(*tfd));
2891         control_flags = (u32 *) tfd;
2892         idx = get_cmd_index(q, q->write_ptr, 0);
2893
2894         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
2895         txq->txb[q->write_ptr].skb[0] = skb;
2896         memcpy(&(txq->txb[q->write_ptr].status.control),
2897                ctl, sizeof(struct ieee80211_tx_control));
2898         out_cmd = &txq->cmd[idx];
2899         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2900         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2901         out_cmd->hdr.cmd = REPLY_TX;
2902         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2903                                 INDEX_TO_SEQ(q->write_ptr)));
2904         /* copy frags header */
2905         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2906
2907         /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2908         len = priv->hw_setting.tx_cmd_len +
2909                 sizeof(struct iwl_cmd_header) + hdr_len;
2910
2911         len_org = len;
2912         len = (len + 3) & ~3;
2913
2914         if (len_org != len)
2915                 len_org = 1;
2916         else
2917                 len_org = 0;
2918
2919         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2920                      offsetof(struct iwl_cmd, hdr);
2921
2922         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2923
2924         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2925                 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2926
2927         /* 802.11 null functions have no payload... */
2928         len = skb->len - hdr_len;
2929         if (len) {
2930                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2931                                            len, PCI_DMA_TODEVICE);
2932                 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2933         }
2934
2935         if (len_org)
2936                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2937
2938         len = (u16)skb->len;
2939         out_cmd->cmd.tx.len = cpu_to_le16(len);
2940
2941         /* TODO need this for burst mode later on */
2942         iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2943
2944         /* set is_hcca to 0; it probably will never be implemented */
2945         iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2946
2947         iwl4965_tx_cmd(priv, out_cmd, sta_id, txcmd_phys,
2948                        hdr, hdr_len, ctl, NULL);
2949
2950         if (!ieee80211_get_morefrag(hdr)) {
2951                 txq->need_update = 1;
2952                 if (qc) {
2953                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2954                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2955                 }
2956         } else {
2957                 wait_write_ptr = 1;
2958                 txq->need_update = 0;
2959         }
2960
2961         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2962                            sizeof(out_cmd->cmd.tx));
2963
2964         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2965                            ieee80211_get_hdrlen(fc));
2966
2967         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2968
2969         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2970         rc = iwl_tx_queue_update_write_ptr(priv, txq);
2971         spin_unlock_irqrestore(&priv->lock, flags);
2972
2973         if (rc)
2974                 return rc;
2975
2976         if ((iwl_queue_space(q) < q->high_mark)
2977             && priv->mac80211_registered) {
2978                 if (wait_write_ptr) {
2979                         spin_lock_irqsave(&priv->lock, flags);
2980                         txq->need_update = 1;
2981                         iwl_tx_queue_update_write_ptr(priv, txq);
2982                         spin_unlock_irqrestore(&priv->lock, flags);
2983                 }
2984
2985                 ieee80211_stop_queue(priv->hw, ctl->queue);
2986         }
2987
2988         return 0;
2989
2990 drop_unlock:
2991         spin_unlock_irqrestore(&priv->lock, flags);
2992 drop:
2993         return -1;
2994 }
2995
2996 static void iwl_set_rate(struct iwl_priv *priv)
2997 {
2998         const struct ieee80211_hw_mode *hw = NULL;
2999         struct ieee80211_rate *rate;
3000         int i;
3001
3002         hw = iwl_get_hw_mode(priv, priv->phymode);
3003         if (!hw) {
3004                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3005                 return;
3006         }
3007
3008         priv->active_rate = 0;
3009         priv->active_rate_basic = 0;
3010
3011         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3012                        hw->mode == MODE_IEEE80211A ?
3013                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3014
3015         for (i = 0; i < hw->num_rates; i++) {
3016                 rate = &(hw->rates[i]);
3017                 if ((rate->val < IWL_RATE_COUNT) &&
3018                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3019                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3020                                        rate->val, iwl_rates[rate->val].plcp,
3021                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3022                                        "*" : "");
3023                         priv->active_rate |= (1 << rate->val);
3024                         if (rate->flags & IEEE80211_RATE_BASIC)
3025                                 priv->active_rate_basic |= (1 << rate->val);
3026                 } else
3027                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3028                                        rate->val, iwl_rates[rate->val].plcp);
3029         }
3030
3031         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3032                        priv->active_rate, priv->active_rate_basic);
3033
3034         /*
3035          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3036          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3037          * OFDM
3038          */
3039         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3040                 priv->staging_rxon.cck_basic_rates =
3041                     ((priv->active_rate_basic &
3042                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3043         else
3044                 priv->staging_rxon.cck_basic_rates =
3045                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3046
3047         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3048                 priv->staging_rxon.ofdm_basic_rates =
3049                     ((priv->active_rate_basic &
3050                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3051                       IWL_FIRST_OFDM_RATE) & 0xFF;
3052         else
3053                 priv->staging_rxon.ofdm_basic_rates =
3054                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3055 }
3056
3057 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
3058 {
3059         unsigned long flags;
3060
3061         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3062                 return;
3063
3064         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3065                           disable_radio ? "OFF" : "ON");
3066
3067         if (disable_radio) {
3068                 iwl_scan_cancel(priv);
3069                 /* FIXME: This is a workaround for AP */
3070                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3071                         spin_lock_irqsave(&priv->lock, flags);
3072                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3073                                     CSR_UCODE_SW_BIT_RFKILL);
3074                         spin_unlock_irqrestore(&priv->lock, flags);
3075                         iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3076                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3077                 }
3078                 return;
3079         }
3080
3081         spin_lock_irqsave(&priv->lock, flags);
3082         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3083
3084         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3085         spin_unlock_irqrestore(&priv->lock, flags);
3086
3087         /* wake up ucode */
3088         msleep(10);
3089
3090         spin_lock_irqsave(&priv->lock, flags);
3091         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3092         if (!iwl_grab_nic_access(priv))
3093                 iwl_release_nic_access(priv);
3094         spin_unlock_irqrestore(&priv->lock, flags);
3095
3096         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3097                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3098                                   "disabled by HW switch\n");
3099                 return;
3100         }
3101
3102         queue_work(priv->workqueue, &priv->restart);
3103         return;
3104 }
3105
3106 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3107                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3108 {
3109         u16 fc =
3110             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3111
3112         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3113                 return;
3114
3115         if (!(fc & IEEE80211_FCTL_PROTECTED))
3116                 return;
3117
3118         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3119         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3120         case RX_RES_STATUS_SEC_TYPE_TKIP:
3121                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3122                     RX_RES_STATUS_BAD_ICV_MIC)
3123                         stats->flag |= RX_FLAG_MMIC_ERROR;
3124         case RX_RES_STATUS_SEC_TYPE_WEP:
3125         case RX_RES_STATUS_SEC_TYPE_CCMP:
3126                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3127                     RX_RES_STATUS_DECRYPT_OK) {
3128                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3129                         stats->flag |= RX_FLAG_DECRYPTED;
3130                 }
3131                 break;
3132
3133         default:
3134                 break;
3135         }
3136 }
3137
3138 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3139                                     struct iwl_rx_mem_buffer *rxb,
3140                                     void *data, short len,
3141                                     struct ieee80211_rx_status *stats,
3142                                     u16 phy_flags)
3143 {
3144         struct iwl_rt_rx_hdr *iwl_rt;
3145
3146         /* First cache any information we need before we overwrite
3147          * the information provided in the skb from the hardware */
3148         s8 signal = stats->ssi;
3149         s8 noise = 0;
3150         int rate = stats->rate;
3151         u64 tsf = stats->mactime;
3152         __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3153
3154         /* We received data from the HW, so stop the watchdog */
3155         if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3156                 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3157                 return;
3158         }
3159
3160         /* copy the frame data to write after where the radiotap header goes */
3161         iwl_rt = (void *)rxb->skb->data;
3162         memmove(iwl_rt->payload, data, len);
3163
3164         iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3165         iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3166
3167         /* total header + data */
3168         iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3169
3170         /* Set the size of the skb to the size of the frame */
3171         skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3172
3173         /* Big bitfield of all the fields we provide in radiotap */
3174         iwl_rt->rt_hdr.it_present =
3175             cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3176                         (1 << IEEE80211_RADIOTAP_FLAGS) |
3177                         (1 << IEEE80211_RADIOTAP_RATE) |
3178                         (1 << IEEE80211_RADIOTAP_CHANNEL) |
3179                         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3180                         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3181                         (1 << IEEE80211_RADIOTAP_ANTENNA));
3182
3183         /* Zero the flags, we'll add to them as we go */
3184         iwl_rt->rt_flags = 0;
3185
3186         iwl_rt->rt_tsf = cpu_to_le64(tsf);
3187
3188         /* Convert to dBm */
3189         iwl_rt->rt_dbmsignal = signal;
3190         iwl_rt->rt_dbmnoise = noise;
3191
3192         /* Convert the channel frequency and set the flags */
3193         iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3194         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3195                 iwl_rt->rt_chbitmask =
3196                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3197         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3198                 iwl_rt->rt_chbitmask =
3199                     cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3200         else    /* 802.11g */
3201                 iwl_rt->rt_chbitmask =
3202                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3203
3204         rate = iwl_rate_index_from_plcp(rate);
3205         if (rate == -1)
3206                 iwl_rt->rt_rate = 0;
3207         else
3208                 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3209
3210         /* antenna number */
3211         iwl_rt->rt_antenna =
3212                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3213
3214         /* set the preamble flag if we have it */
3215         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3216                 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3217
3218         IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3219
3220         stats->flag |= RX_FLAG_RADIOTAP;
3221         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3222         rxb->skb = NULL;
3223 }
3224
3225
3226 #define IWL_PACKET_RETRY_TIME HZ
3227
3228 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3229 {
3230         u16 sc = le16_to_cpu(header->seq_ctrl);
3231         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3232         u16 frag = sc & IEEE80211_SCTL_FRAG;
3233         u16 *last_seq, *last_frag;
3234         unsigned long *last_time;
3235
3236         switch (priv->iw_mode) {
3237         case IEEE80211_IF_TYPE_IBSS:{
3238                 struct list_head *p;
3239                 struct iwl_ibss_seq *entry = NULL;
3240                 u8 *mac = header->addr2;
3241                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3242
3243                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3244                         entry = list_entry(p, struct iwl_ibss_seq, list);
3245                         if (!compare_ether_addr(entry->mac, mac))
3246                                 break;
3247                 }
3248                 if (p == &priv->ibss_mac_hash[index]) {
3249                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3250                         if (!entry) {
3251                                 IWL_ERROR("Cannot malloc new mac entry\n");
3252                                 return 0;
3253                         }
3254                         memcpy(entry->mac, mac, ETH_ALEN);
3255                         entry->seq_num = seq;
3256                         entry->frag_num = frag;
3257                         entry->packet_time = jiffies;
3258                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3259                         return 0;
3260                 }
3261                 last_seq = &entry->seq_num;
3262                 last_frag = &entry->frag_num;
3263                 last_time = &entry->packet_time;
3264                 break;
3265         }
3266         case IEEE80211_IF_TYPE_STA:
3267                 last_seq = &priv->last_seq_num;
3268                 last_frag = &priv->last_frag_num;
3269                 last_time = &priv->last_packet_time;
3270                 break;
3271         default:
3272                 return 0;
3273         }
3274         if ((*last_seq == seq) &&
3275             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3276                 if (*last_frag == frag)
3277                         goto drop;
3278                 if (*last_frag + 1 != frag)
3279                         /* out-of-order fragment */
3280                         goto drop;
3281         } else
3282                 *last_seq = seq;
3283
3284         *last_frag = frag;
3285         *last_time = jiffies;
3286         return 0;
3287
3288  drop:
3289         return 1;
3290 }
3291
3292 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3293
3294 #include "iwl-spectrum.h"
3295
3296 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3297 #define BEACON_TIME_MASK_HIGH   0xFF000000
3298 #define TIME_UNIT               1024
3299
3300 /*
3301  * extended beacon time format
3302  * time in usec will be changed into a 32-bit value in 8:24 format
3303  * the high 1 byte is the beacon counts
3304  * the lower 3 bytes is the time in usec within one beacon interval
3305  */
3306
3307 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3308 {
3309         u32 quot;
3310         u32 rem;
3311         u32 interval = beacon_interval * 1024;
3312
3313         if (!interval || !usec)
3314                 return 0;
3315
3316         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3317         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3318
3319         return (quot << 24) + rem;
3320 }
3321
3322 /* base is usually what we get from ucode with each received frame,
3323  * the same as HW timer counter counting down
3324  */
3325
3326 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3327 {
3328         u32 base_low = base & BEACON_TIME_MASK_LOW;
3329         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3330         u32 interval = beacon_interval * TIME_UNIT;
3331         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3332             (addon & BEACON_TIME_MASK_HIGH);
3333
3334         if (base_low > addon_low)
3335                 res += base_low - addon_low;
3336         else if (base_low < addon_low) {
3337                 res += interval + base_low - addon_low;
3338                 res += (1 << 24);
3339         } else
3340                 res += (1 << 24);
3341
3342         return cpu_to_le32(res);
3343 }
3344
3345 static int iwl_get_measurement(struct iwl_priv *priv,
3346                                struct ieee80211_measurement_params *params,
3347                                u8 type)
3348 {
3349         struct iwl_spectrum_cmd spectrum;
3350         struct iwl_rx_packet *res;
3351         struct iwl_host_cmd cmd = {
3352                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3353                 .data = (void *)&spectrum,
3354                 .meta.flags = CMD_WANT_SKB,
3355         };
3356         u32 add_time = le64_to_cpu(params->start_time);
3357         int rc;
3358         int spectrum_resp_status;
3359         int duration = le16_to_cpu(params->duration);
3360
3361         if (iwl_is_associated(priv))
3362                 add_time =
3363                     iwl_usecs_to_beacons(
3364                         le64_to_cpu(params->start_time) - priv->last_tsf,
3365                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3366
3367         memset(&spectrum, 0, sizeof(spectrum));
3368
3369         spectrum.channel_count = cpu_to_le16(1);
3370         spectrum.flags =
3371             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3372         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3373         cmd.len = sizeof(spectrum);
3374         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3375
3376         if (iwl_is_associated(priv))
3377                 spectrum.start_time =
3378                     iwl_add_beacon_time(priv->last_beacon_time,
3379                                 add_time,
3380                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3381         else
3382                 spectrum.start_time = 0;
3383
3384         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3385         spectrum.channels[0].channel = params->channel;
3386         spectrum.channels[0].type = type;
3387         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3388                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3389                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3390
3391         rc = iwl_send_cmd_sync(priv, &cmd);
3392         if (rc)
3393                 return rc;
3394
3395         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3396         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3397                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3398                 rc = -EIO;
3399         }
3400
3401         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3402         switch (spectrum_resp_status) {
3403         case 0:         /* Command will be handled */
3404                 if (res->u.spectrum.id != 0xff) {
3405                         IWL_DEBUG_INFO
3406                             ("Replaced existing measurement: %d\n",
3407                              res->u.spectrum.id);
3408                         priv->measurement_status &= ~MEASUREMENT_READY;
3409                 }
3410                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3411                 rc = 0;
3412                 break;
3413
3414         case 1:         /* Command will not be handled */
3415                 rc = -EAGAIN;
3416                 break;
3417         }
3418
3419         dev_kfree_skb_any(cmd.meta.u.skb);
3420
3421         return rc;
3422 }
3423 #endif
3424
3425 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3426                                  struct iwl_tx_info *tx_sta)
3427 {
3428
3429         tx_sta->status.ack_signal = 0;
3430         tx_sta->status.excessive_retries = 0;
3431         tx_sta->status.queue_length = 0;
3432         tx_sta->status.queue_number = 0;
3433
3434         if (in_interrupt())
3435                 ieee80211_tx_status_irqsafe(priv->hw,
3436                                             tx_sta->skb[0], &(tx_sta->status));
3437         else
3438                 ieee80211_tx_status(priv->hw,
3439                                     tx_sta->skb[0], &(tx_sta->status));
3440
3441         tx_sta->skb[0] = NULL;
3442 }
3443
3444 /**
3445  * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3446  *
3447  * When FW advances 'R' index, all entries between old and
3448  * new 'R' index need to be reclaimed. As result, some free space
3449  * forms. If there is enough free space (> low mark), wake Tx queue.
3450  */
3451 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3452 {
3453         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3454         struct iwl_queue *q = &txq->q;
3455         int nfreed = 0;
3456
3457         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3458                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3459                           "is out of range [0-%d] %d %d.\n", txq_id,
3460                           index, q->n_bd, q->write_ptr, q->read_ptr);
3461                 return 0;
3462         }
3463
3464         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3465                 q->read_ptr != index;
3466                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3467                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3468                         iwl_txstatus_to_ieee(priv,
3469                                         &(txq->txb[txq->q.read_ptr]));
3470                         iwl_hw_txq_free_tfd(priv, txq);
3471                 } else if (nfreed > 1) {
3472                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3473                                         q->write_ptr, q->read_ptr);
3474                         queue_work(priv->workqueue, &priv->restart);
3475                 }
3476                 nfreed++;
3477         }
3478
3479         if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3480                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3481                         priv->mac80211_registered)
3482                 ieee80211_wake_queue(priv->hw, txq_id);
3483
3484
3485         return nfreed;
3486 }
3487
3488 static int iwl_is_tx_success(u32 status)
3489 {
3490         status &= TX_STATUS_MSK;
3491         return (status == TX_STATUS_SUCCESS)
3492             || (status == TX_STATUS_DIRECT_DONE);
3493 }
3494
3495 /******************************************************************************
3496  *
3497  * Generic RX handler implementations
3498  *
3499  ******************************************************************************/
3500 #ifdef CONFIG_IWLWIFI_HT
3501 #ifdef CONFIG_IWLWIFI_HT_AGG
3502
3503 static inline int iwl_get_ra_sta_id(struct iwl_priv *priv,
3504                                     struct ieee80211_hdr *hdr)
3505 {
3506         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3507                 return IWL_AP_ID;
3508         else {
3509                 u8 *da = ieee80211_get_DA(hdr);
3510                 return iwl_hw_find_station(priv, da);
3511         }
3512 }
3513
3514 static struct ieee80211_hdr *iwl_tx_queue_get_hdr(
3515         struct iwl_priv *priv, int txq_id, int idx)
3516 {
3517         if (priv->txq[txq_id].txb[idx].skb[0])
3518                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3519                                 txb[idx].skb[0]->data;
3520         return NULL;
3521 }
3522
3523 static inline u32 iwl_get_scd_ssn(struct iwl_tx_resp *tx_resp)
3524 {
3525         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3526                                 tx_resp->frame_count);
3527         return le32_to_cpu(*scd_ssn) & MAX_SN;
3528
3529 }
3530 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3531                                       struct iwl_ht_agg *agg,
3532                                       struct iwl_tx_resp *tx_resp,
3533                                       u16 start_idx)
3534 {
3535         u32 status;
3536         __le32 *frame_status = &tx_resp->status;
3537         struct ieee80211_tx_status *tx_status = NULL;
3538         struct ieee80211_hdr *hdr = NULL;
3539         int i, sh;
3540         int txq_id, idx;
3541         u16 seq;
3542
3543         if (agg->wait_for_ba)
3544                 IWL_DEBUG_TX_REPLY("got tx repsons w/o back\n");
3545
3546         agg->frame_count = tx_resp->frame_count;
3547         agg->start_idx = start_idx;
3548         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3549         agg->bitmap0 = agg->bitmap1 = 0;
3550
3551         if (agg->frame_count == 1) {
3552                 struct iwl_tx_queue *txq ;
3553                 status = le32_to_cpu(frame_status[0]);
3554
3555                 txq_id = agg->txq_id;
3556                 txq = &priv->txq[txq_id];
3557                 /* FIXME: code repetition */
3558                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3559                                    agg->frame_count, agg->start_idx);
3560
3561                 tx_status = &(priv->txq[txq_id].txb[txq->q.read_ptr].status);
3562                 tx_status->retry_count = tx_resp->failure_frame;
3563                 tx_status->queue_number = status & 0xff;
3564                 tx_status->queue_length = tx_resp->bt_kill_count;
3565                 tx_status->queue_length |= tx_resp->failure_rts;
3566
3567                 tx_status->flags = iwl_is_tx_success(status)?
3568                         IEEE80211_TX_STATUS_ACK : 0;
3569                 tx_status->control.tx_rate =
3570                                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3571                 /* FIXME: code repetition end */
3572
3573                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3574                                     status & 0xff, tx_resp->failure_frame);
3575                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3576                                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3577
3578                 agg->wait_for_ba = 0;
3579         } else {
3580                 u64 bitmap = 0;
3581                 int start = agg->start_idx;
3582
3583                 for (i = 0; i < agg->frame_count; i++) {
3584                         u16 sc;
3585                         status = le32_to_cpu(frame_status[i]);
3586                         seq  = status >> 16;
3587                         idx = SEQ_TO_INDEX(seq);
3588                         txq_id = SEQ_TO_QUEUE(seq);
3589
3590                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3591                                       AGG_TX_STATE_ABORT_MSK))
3592                                 continue;
3593
3594                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3595                                            agg->frame_count, txq_id, idx);
3596
3597                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3598
3599                         sc = le16_to_cpu(hdr->seq_ctrl);
3600                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3601                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3602                                           " idx=%d, seq_idx=%d, seq=%d\n",
3603                                           idx, SEQ_TO_SN(sc),
3604                                           hdr->seq_ctrl);
3605                                 return -1;
3606                         }
3607
3608                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3609                                            i, idx, SEQ_TO_SN(sc));
3610
3611                         sh = idx - start;
3612                         if (sh > 64) {
3613                                 sh = (start - idx) + 0xff;
3614                                 bitmap = bitmap << sh;
3615                                 sh = 0;
3616                                 start = idx;
3617                         } else if (sh < -64)
3618                                 sh  = 0xff - (start - idx);
3619                         else if (sh < 0) {
3620                                 sh = start - idx;
3621                                 start = idx;
3622                                 bitmap = bitmap << sh;
3623                                 sh = 0;
3624                         }
3625                         bitmap |= (1 << sh);
3626                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3627                                            start, (u32)(bitmap & 0xFFFFFFFF));
3628                 }
3629
3630                 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3631                 agg->bitmap1 = bitmap >> 32;
3632                 agg->start_idx = start;
3633                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3634                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3635                                    agg->frame_count, agg->start_idx,
3636                                    agg->bitmap0);
3637
3638                 if (bitmap)
3639                         agg->wait_for_ba = 1;
3640         }
3641         return 0;
3642 }
3643 #endif
3644 #endif
3645
3646 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3647                             struct iwl_rx_mem_buffer *rxb)
3648 {
3649         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3650         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3651         int txq_id = SEQ_TO_QUEUE(sequence);
3652         int index = SEQ_TO_INDEX(sequence);
3653         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3654         struct ieee80211_tx_status *tx_status;
3655         struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3656         u32  status = le32_to_cpu(tx_resp->status);
3657 #ifdef CONFIG_IWLWIFI_HT
3658 #ifdef CONFIG_IWLWIFI_HT_AGG
3659         int tid, sta_id;
3660 #endif
3661 #endif
3662
3663         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3664                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3665                           "is out of range [0-%d] %d %d\n", txq_id,
3666                           index, txq->q.n_bd, txq->q.write_ptr,
3667                           txq->q.read_ptr);
3668                 return;
3669         }
3670
3671 #ifdef CONFIG_IWLWIFI_HT
3672 #ifdef CONFIG_IWLWIFI_HT_AGG
3673         if (txq->sched_retry) {
3674                 const u32 scd_ssn = iwl_get_scd_ssn(tx_resp);
3675                 struct ieee80211_hdr *hdr =
3676                         iwl_tx_queue_get_hdr(priv, txq_id, index);
3677                 struct iwl_ht_agg *agg = NULL;
3678                 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3679
3680                 if (qc == NULL) {
3681                         IWL_ERROR("BUG_ON qc is null!!!!\n");
3682                         return;
3683                 }
3684
3685                 tid = le16_to_cpu(*qc) & 0xf;
3686
3687                 sta_id = iwl_get_ra_sta_id(priv, hdr);
3688                 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3689                         IWL_ERROR("Station not known for\n");
3690                         return;
3691                 }
3692
3693                 agg = &priv->stations[sta_id].tid[tid].agg;
3694
3695                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3696
3697                 if ((tx_resp->frame_count == 1) &&
3698                     !iwl_is_tx_success(status)) {
3699                         /* TODO: send BAR */
3700                 }
3701
3702                 if ((txq->q.read_ptr != (scd_ssn & 0xff))) {
3703                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3704                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3705                                            "%d index %d\n", scd_ssn , index);
3706                         iwl_tx_queue_reclaim(priv, txq_id, index);
3707                 }
3708         } else {
3709 #endif /* CONFIG_IWLWIFI_HT_AGG */
3710 #endif /* CONFIG_IWLWIFI_HT */
3711         tx_status = &(txq->txb[txq->q.read_ptr].status);
3712
3713         tx_status->retry_count = tx_resp->failure_frame;
3714         tx_status->queue_number = status;
3715         tx_status->queue_length = tx_resp->bt_kill_count;
3716         tx_status->queue_length |= tx_resp->failure_rts;
3717
3718         tx_status->flags =
3719             iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3720
3721         tx_status->control.tx_rate =
3722                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3723
3724         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3725                      "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3726                      status, le32_to_cpu(tx_resp->rate_n_flags),
3727                      tx_resp->failure_frame);
3728
3729         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3730         if (index != -1)
3731                 iwl_tx_queue_reclaim(priv, txq_id, index);
3732 #ifdef CONFIG_IWLWIFI_HT
3733 #ifdef CONFIG_IWLWIFI_HT_AGG
3734         }
3735 #endif /* CONFIG_IWLWIFI_HT_AGG */
3736 #endif /* CONFIG_IWLWIFI_HT */
3737
3738         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3739                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3740 }
3741
3742
3743 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3744                                struct iwl_rx_mem_buffer *rxb)
3745 {
3746         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3747         struct iwl_alive_resp *palive;
3748         struct delayed_work *pwork;
3749
3750         palive = &pkt->u.alive_frame;
3751
3752         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3753                        "0x%01X 0x%01X\n",
3754                        palive->is_valid, palive->ver_type,
3755                        palive->ver_subtype);
3756
3757         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3758                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3759                 memcpy(&priv->card_alive_init,
3760                        &pkt->u.alive_frame,
3761                        sizeof(struct iwl_init_alive_resp));
3762                 pwork = &priv->init_alive_start;
3763         } else {
3764                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3765                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3766                        sizeof(struct iwl_alive_resp));
3767                 pwork = &priv->alive_start;
3768         }
3769
3770         /* We delay the ALIVE response by 5ms to
3771          * give the HW RF Kill time to activate... */
3772         if (palive->is_valid == UCODE_VALID_OK)
3773                 queue_delayed_work(priv->workqueue, pwork,
3774                                    msecs_to_jiffies(5));
3775         else
3776                 IWL_WARNING("uCode did not respond OK.\n");
3777 }
3778
3779 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3780                                  struct iwl_rx_mem_buffer *rxb)
3781 {
3782         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3783
3784         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3785         return;
3786 }
3787
3788 static void iwl_rx_reply_error(struct iwl_priv *priv,
3789                                struct iwl_rx_mem_buffer *rxb)
3790 {
3791         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3792
3793         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3794                 "seq 0x%04X ser 0x%08X\n",
3795                 le32_to_cpu(pkt->u.err_resp.error_type),
3796                 get_cmd_string(pkt->u.err_resp.cmd_id),
3797                 pkt->u.err_resp.cmd_id,
3798                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3799                 le32_to_cpu(pkt->u.err_resp.error_info));
3800 }
3801
3802 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3803
3804 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3805 {
3806         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3807         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3808         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3809         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3810                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3811         rxon->channel = csa->channel;
3812         priv->staging_rxon.channel = csa->channel;
3813 }
3814
3815 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3816                                           struct iwl_rx_mem_buffer *rxb)
3817 {
3818 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3819         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3820         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3821
3822         if (!report->state) {
3823                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3824                           "Spectrum Measure Notification: Start\n");
3825                 return;
3826         }
3827
3828         memcpy(&priv->measure_report, report, sizeof(*report));
3829         priv->measurement_status |= MEASUREMENT_READY;
3830 #endif
3831 }
3832
3833 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3834                                   struct iwl_rx_mem_buffer *rxb)
3835 {
3836 #ifdef CONFIG_IWLWIFI_DEBUG
3837         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3838         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3839         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3840                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3841 #endif
3842 }
3843
3844 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3845                                              struct iwl_rx_mem_buffer *rxb)
3846 {
3847         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3848         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3849                         "notification for %s:\n",
3850                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3851         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3852 }
3853
3854 static void iwl_bg_beacon_update(struct work_struct *work)
3855 {
3856         struct iwl_priv *priv =
3857                 container_of(work, struct iwl_priv, beacon_update);
3858         struct sk_buff *beacon;
3859
3860         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3861         beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3862
3863         if (!beacon) {
3864                 IWL_ERROR("update beacon failed\n");
3865                 return;
3866         }
3867
3868         mutex_lock(&priv->mutex);
3869         /* new beacon skb is allocated every time; dispose previous.*/
3870         if (priv->ibss_beacon)
3871                 dev_kfree_skb(priv->ibss_beacon);
3872
3873         priv->ibss_beacon = beacon;
3874         mutex_unlock(&priv->mutex);
3875
3876         iwl_send_beacon_cmd(priv);
3877 }
3878
3879 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3880                                 struct iwl_rx_mem_buffer *rxb)
3881 {
3882 #ifdef CONFIG_IWLWIFI_DEBUG
3883         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3884         struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3885         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3886
3887         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3888                 "tsf %d %d rate %d\n",
3889                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3890                 beacon->beacon_notify_hdr.failure_frame,
3891                 le32_to_cpu(beacon->ibss_mgr_status),
3892                 le32_to_cpu(beacon->high_tsf),
3893                 le32_to_cpu(beacon->low_tsf), rate);
3894 #endif
3895
3896         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3897             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3898                 queue_work(priv->workqueue, &priv->beacon_update);
3899 }
3900
3901 /* Service response to REPLY_SCAN_CMD (0x80) */
3902 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3903                               struct iwl_rx_mem_buffer *rxb)
3904 {
3905 #ifdef CONFIG_IWLWIFI_DEBUG
3906         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3907         struct iwl_scanreq_notification *notif =
3908             (struct iwl_scanreq_notification *)pkt->u.raw;
3909
3910         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3911 #endif
3912 }
3913
3914 /* Service SCAN_START_NOTIFICATION (0x82) */
3915 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3916                                     struct iwl_rx_mem_buffer *rxb)
3917 {
3918         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3919         struct iwl_scanstart_notification *notif =
3920             (struct iwl_scanstart_notification *)pkt->u.raw;
3921         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3922         IWL_DEBUG_SCAN("Scan start: "
3923                        "%d [802.11%s] "
3924                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3925                        notif->channel,
3926                        notif->band ? "bg" : "a",
3927                        notif->tsf_high,
3928                        notif->tsf_low, notif->status, notif->beacon_timer);
3929 }
3930
3931 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3932 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3933                                       struct iwl_rx_mem_buffer *rxb)
3934 {
3935         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3936         struct iwl_scanresults_notification *notif =
3937             (struct iwl_scanresults_notification *)pkt->u.raw;
3938
3939         IWL_DEBUG_SCAN("Scan ch.res: "
3940                        "%d [802.11%s] "
3941                        "(TSF: 0x%08X:%08X) - %d "
3942                        "elapsed=%lu usec (%dms since last)\n",
3943                        notif->channel,
3944                        notif->band ? "bg" : "a",
3945                        le32_to_cpu(notif->tsf_high),
3946                        le32_to_cpu(notif->tsf_low),
3947                        le32_to_cpu(notif->statistics[0]),
3948                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3949                        jiffies_to_msecs(elapsed_jiffies
3950                                         (priv->last_scan_jiffies, jiffies)));
3951
3952         priv->last_scan_jiffies = jiffies;
3953 }
3954
3955 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3956 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3957                                        struct iwl_rx_mem_buffer *rxb)
3958 {
3959         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3960         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3961
3962         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3963                        scan_notif->scanned_channels,
3964                        scan_notif->tsf_low,
3965                        scan_notif->tsf_high, scan_notif->status);
3966
3967         /* The HW is no longer scanning */
3968         clear_bit(STATUS_SCAN_HW, &priv->status);
3969
3970         /* The scan completion notification came in, so kill that timer... */
3971         cancel_delayed_work(&priv->scan_check);
3972
3973         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3974                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3975                        jiffies_to_msecs(elapsed_jiffies
3976                                         (priv->scan_pass_start, jiffies)));
3977
3978         /* Remove this scanned band from the list
3979          * of pending bands to scan */
3980         priv->scan_bands--;
3981
3982         /* If a request to abort was given, or the scan did not succeed
3983          * then we reset the scan state machine and terminate,
3984          * re-queuing another scan if one has been requested */
3985         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3986                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3987                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3988         } else {
3989                 /* If there are more bands on this scan pass reschedule */
3990                 if (priv->scan_bands > 0)
3991                         goto reschedule;
3992         }
3993
3994         priv->last_scan_jiffies = jiffies;
3995         IWL_DEBUG_INFO("Setting scan to off\n");
3996
3997         clear_bit(STATUS_SCANNING, &priv->status);
3998
3999         IWL_DEBUG_INFO("Scan took %dms\n",
4000                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4001
4002         queue_work(priv->workqueue, &priv->scan_completed);
4003
4004         return;
4005
4006 reschedule:
4007         priv->scan_pass_start = jiffies;
4008         queue_work(priv->workqueue, &priv->request_scan);
4009 }
4010
4011 /* Handle notification from uCode that card's power state is changing
4012  * due to software, hardware, or critical temperature RFKILL */
4013 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
4014                                     struct iwl_rx_mem_buffer *rxb)
4015 {
4016         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4017         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4018         unsigned long status = priv->status;
4019
4020         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4021                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4022                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4023
4024         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4025                      RF_CARD_DISABLED)) {
4026
4027                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4028                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4029
4030                 if (!iwl_grab_nic_access(priv)) {
4031                         iwl_write_direct32(
4032                                 priv, HBUS_TARG_MBX_C,
4033                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4034
4035                         iwl_release_nic_access(priv);
4036                 }
4037
4038                 if (!(flags & RXON_CARD_DISABLED)) {
4039                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4040                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4041                         if (!iwl_grab_nic_access(priv)) {
4042                                 iwl_write_direct32(
4043                                         priv, HBUS_TARG_MBX_C,
4044                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4045
4046                                 iwl_release_nic_access(priv);
4047                         }
4048                 }
4049
4050                 if (flags & RF_CARD_DISABLED) {
4051                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4052                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4053                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
4054                         if (!iwl_grab_nic_access(priv))
4055                                 iwl_release_nic_access(priv);
4056                 }
4057         }
4058
4059         if (flags & HW_CARD_DISABLED)
4060                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4061         else
4062                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4063
4064
4065         if (flags & SW_CARD_DISABLED)
4066                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4067         else
4068                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4069
4070         if (!(flags & RXON_CARD_DISABLED))
4071                 iwl_scan_cancel(priv);
4072
4073         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4074              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4075             (test_bit(STATUS_RF_KILL_SW, &status) !=
4076              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4077                 queue_work(priv->workqueue, &priv->rf_kill);
4078         else
4079                 wake_up_interruptible(&priv->wait_command_queue);
4080 }
4081
4082 /**
4083  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
4084  *
4085  * Setup the RX handlers for each of the reply types sent from the uCode
4086  * to the host.
4087  *
4088  * This function chains into the hardware specific files for them to setup
4089  * any hardware specific handlers as well.
4090  */
4091 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
4092 {
4093         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
4094         priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
4095         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
4096         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
4097         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4098             iwl_rx_spectrum_measure_notif;
4099         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
4100         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4101             iwl_rx_pm_debug_statistics_notif;
4102         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
4103
4104         /* NOTE:  iwl_rx_statistics is different based on whether
4105          * the build is for the 3945 or the 4965.  See the
4106          * corresponding implementation in iwl-XXXX.c
4107          *
4108          * The same handler is used for both the REPLY to a
4109          * discrete statistics request from the host as well as
4110          * for the periodic statistics notification from the uCode
4111          */
4112         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
4113         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
4114
4115         priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
4116         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
4117         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4118             iwl_rx_scan_results_notif;
4119         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4120             iwl_rx_scan_complete_notif;
4121         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
4122         priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
4123
4124         /* Setup hardware specific Rx handlers */
4125         iwl_hw_rx_handler_setup(priv);
4126 }
4127
4128 /**
4129  * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4130  * @rxb: Rx buffer to reclaim
4131  *
4132  * If an Rx buffer has an async callback associated with it the callback
4133  * will be executed.  The attached skb (if present) will only be freed
4134  * if the callback returns 1
4135  */
4136 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
4137                                 struct iwl_rx_mem_buffer *rxb)
4138 {
4139         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
4140         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4141         int txq_id = SEQ_TO_QUEUE(sequence);
4142         int index = SEQ_TO_INDEX(sequence);
4143         int huge = sequence & SEQ_HUGE_FRAME;
4144         int cmd_index;
4145         struct iwl_cmd *cmd;
4146
4147         /* If a Tx command is being handled and it isn't in the actual
4148          * command queue then there a command routing bug has been introduced
4149          * in the queue management code. */
4150         if (txq_id != IWL_CMD_QUEUE_NUM)
4151                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4152                           txq_id, pkt->hdr.cmd);
4153         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4154
4155         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4156         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4157
4158         /* Input error checking is done when commands are added to queue. */
4159         if (cmd->meta.flags & CMD_WANT_SKB) {
4160                 cmd->meta.source->u.skb = rxb->skb;
4161                 rxb->skb = NULL;
4162         } else if (cmd->meta.u.callback &&
4163                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4164                 rxb->skb = NULL;
4165
4166         iwl_tx_queue_reclaim(priv, txq_id, index);
4167
4168         if (!(cmd->meta.flags & CMD_ASYNC)) {
4169                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4170                 wake_up_interruptible(&priv->wait_command_queue);
4171         }
4172 }
4173
4174 /************************** RX-FUNCTIONS ****************************/
4175 /*
4176  * Rx theory of operation
4177  *
4178  * The host allocates 32 DMA target addresses and passes the host address
4179  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
4180  * 0 to 31
4181  *
4182  * Rx Queue Indexes
4183  * The host/firmware share two index registers for managing the Rx buffers.
4184  *
4185  * The READ index maps to the first position that the firmware may be writing
4186  * to -- the driver can read up to (but not including) this position and get
4187  * good data.
4188  * The READ index is managed by the firmware once the card is enabled.
4189  *
4190  * The WRITE index maps to the last position the driver has read from -- the
4191  * position preceding WRITE is the last slot the firmware can place a packet.
4192  *
4193  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4194  * WRITE = READ.
4195  *
4196  * During initialization the host sets up the READ queue position to the first
4197  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4198  *
4199  * When the firmware places a packet in a buffer it will advance the READ index
4200  * and fire the RX interrupt.  The driver can then query the READ index and
4201  * process as many packets as possible, moving the WRITE index forward as it
4202  * resets the Rx queue buffers with new memory.
4203  *
4204  * The management in the driver is as follows:
4205  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4206  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4207  *   to replenish the iwl->rxq->rx_free.
4208  * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
4209  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4210  *   'processed' and 'read' driver indexes as well)
4211  * + A received packet is processed and handed to the kernel network stack,
4212  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4213  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4214  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4215  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4216  *   were enough free buffers and RX_STALLED is set it is cleared.
4217  *
4218  *
4219  * Driver sequence:
4220  *
4221  * iwl_rx_queue_alloc()       Allocates rx_free
4222  * iwl_rx_replenish()         Replenishes rx_free list from rx_used, and calls
4223  *                            iwl_rx_queue_restock
4224  * iwl_rx_queue_restock()     Moves available buffers from rx_free into Rx
4225  *                            queue, updates firmware pointers, and updates
4226  *                            the WRITE index.  If insufficient rx_free buffers
4227  *                            are available, schedules iwl_rx_replenish
4228  *
4229  * -- enable interrupts --
4230  * ISR - iwl_rx()             Detach iwl_rx_mem_buffers from pool up to the
4231  *                            READ INDEX, detaching the SKB from the pool.
4232  *                            Moves the packet buffer from queue to rx_used.
4233  *                            Calls iwl_rx_queue_restock to refill any empty
4234  *                            slots.
4235  * ...
4236  *
4237  */
4238
4239 /**
4240  * iwl_rx_queue_space - Return number of free slots available in queue.
4241  */
4242 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
4243 {
4244         int s = q->read - q->write;
4245         if (s <= 0)
4246                 s += RX_QUEUE_SIZE;
4247         /* keep some buffer to not confuse full and empty queue */
4248         s -= 2;
4249         if (s < 0)
4250                 s = 0;
4251         return s;
4252 }
4253
4254 /**
4255  * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4256  *
4257  * NOTE: This function has 3945 and 4965 specific code sections
4258  * but is declared in base due to the majority of the
4259  * implementation being the same (only a numeric constant is
4260  * different)
4261  *
4262  */
4263 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
4264 {
4265         u32 reg = 0;
4266         int rc = 0;
4267         unsigned long flags;
4268
4269         spin_lock_irqsave(&q->lock, flags);
4270
4271         if (q->need_update == 0)
4272                 goto exit_unlock;
4273
4274         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4275                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4276
4277                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4278                         iwl_set_bit(priv, CSR_GP_CNTRL,
4279                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4280                         goto exit_unlock;
4281                 }
4282
4283                 rc = iwl_grab_nic_access(priv);
4284                 if (rc)
4285                         goto exit_unlock;
4286
4287                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4288                                      q->write & ~0x7);
4289                 iwl_release_nic_access(priv);
4290         } else
4291                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4292
4293
4294         q->need_update = 0;
4295
4296  exit_unlock:
4297         spin_unlock_irqrestore(&q->lock, flags);
4298         return rc;
4299 }
4300
4301 /**
4302  * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
4303  *
4304  * NOTE: This function has 3945 and 4965 specific code paths in it.
4305  */
4306 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
4307                                           dma_addr_t dma_addr)
4308 {
4309         return cpu_to_le32((u32)(dma_addr >> 8));
4310 }
4311
4312
4313 /**
4314  * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4315  *
4316  * If there are slots in the RX queue that  need to be restocked,
4317  * and we have free pre-allocated buffers, fill the ranks as much
4318  * as we can pulling from rx_free.
4319  *
4320  * This moves the 'write' index forward to catch up with 'processed', and
4321  * also updates the memory address in the firmware to reference the new
4322  * target buffer.
4323  */
4324 int iwl_rx_queue_restock(struct iwl_priv *priv)
4325 {
4326         struct iwl_rx_queue *rxq = &priv->rxq;
4327         struct list_head *element;
4328         struct iwl_rx_mem_buffer *rxb;
4329         unsigned long flags;
4330         int write, rc;
4331
4332         spin_lock_irqsave(&rxq->lock, flags);
4333         write = rxq->write & ~0x7;
4334         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4335                 element = rxq->rx_free.next;
4336                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4337                 list_del(element);
4338                 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4339                 rxq->queue[rxq->write] = rxb;
4340                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4341                 rxq->free_count--;
4342         }
4343         spin_unlock_irqrestore(&rxq->lock, flags);
4344         /* If the pre-allocated buffer pool is dropping low, schedule to
4345          * refill it */
4346         if (rxq->free_count <= RX_LOW_WATERMARK)
4347                 queue_work(priv->workqueue, &priv->rx_replenish);
4348
4349
4350         /* If we've added more space for the firmware to place data, tell it */
4351         if ((write != (rxq->write & ~0x7))
4352             || (abs(rxq->write - rxq->read) > 7)) {
4353                 spin_lock_irqsave(&rxq->lock, flags);
4354                 rxq->need_update = 1;
4355                 spin_unlock_irqrestore(&rxq->lock, flags);
4356                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4357                 if (rc)
4358                         return rc;
4359         }
4360
4361         return 0;
4362 }
4363
4364 /**
4365  * iwl_rx_replenish - Move all used packet from rx_used to rx_free
4366  *
4367  * When moving to rx_free an SKB is allocated for the slot.
4368  *
4369  * Also restock the Rx queue via iwl_rx_queue_restock.
4370  * This is called as a scheduled work item (except for during initialization)
4371  */
4372 void iwl_rx_replenish(void *data)
4373 {
4374         struct iwl_priv *priv = data;
4375         struct iwl_rx_queue *rxq = &priv->rxq;
4376         struct list_head *element;
4377         struct iwl_rx_mem_buffer *rxb;
4378         unsigned long flags;
4379         spin_lock_irqsave(&rxq->lock, flags);
4380         while (!list_empty(&rxq->rx_used)) {
4381                 element = rxq->rx_used.next;
4382                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4383                 rxb->skb =
4384                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4385                 if (!rxb->skb) {
4386                         if (net_ratelimit())
4387                                 printk(KERN_CRIT DRV_NAME
4388                                        ": Can not allocate SKB buffers\n");
4389                         /* We don't reschedule replenish work here -- we will
4390                          * call the restock method and if it still needs
4391                          * more buffers it will schedule replenish */
4392                         break;
4393                 }
4394                 priv->alloc_rxb_skb++;
4395                 list_del(element);
4396                 rxb->dma_addr =
4397                     pci_map_single(priv->pci_dev, rxb->skb->data,
4398                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4399                 list_add_tail(&rxb->list, &rxq->rx_free);
4400                 rxq->free_count++;
4401         }
4402         spin_unlock_irqrestore(&rxq->lock, flags);
4403
4404         spin_lock_irqsave(&priv->lock, flags);
4405         iwl_rx_queue_restock(priv);
4406         spin_unlock_irqrestore(&priv->lock, flags);
4407 }
4408
4409 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4410  * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4411  * This free routine walks the list of POOL entries and if SKB is set to
4412  * non NULL it is unmapped and freed
4413  */
4414 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4415 {
4416         int i;
4417         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4418                 if (rxq->pool[i].skb != NULL) {
4419                         pci_unmap_single(priv->pci_dev,
4420                                          rxq->pool[i].dma_addr,
4421                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4422                         dev_kfree_skb(rxq->pool[i].skb);
4423                 }
4424         }
4425
4426         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4427                             rxq->dma_addr);
4428         rxq->bd = NULL;
4429 }
4430
4431 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4432 {
4433         struct iwl_rx_queue *rxq = &priv->rxq;
4434         struct pci_dev *dev = priv->pci_dev;
4435         int i;
4436
4437         spin_lock_init(&rxq->lock);
4438         INIT_LIST_HEAD(&rxq->rx_free);
4439         INIT_LIST_HEAD(&rxq->rx_used);
4440         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4441         if (!rxq->bd)
4442                 return -ENOMEM;
4443         /* Fill the rx_used queue with _all_ of the Rx buffers */
4444         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4445                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4446         /* Set us so that we have processed and used all buffers, but have
4447          * not restocked the Rx queue with fresh buffers */
4448         rxq->read = rxq->write = 0;
4449         rxq->free_count = 0;
4450         rxq->need_update = 0;
4451         return 0;
4452 }
4453
4454 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4455 {
4456         unsigned long flags;
4457         int i;
4458         spin_lock_irqsave(&rxq->lock, flags);
4459         INIT_LIST_HEAD(&rxq->rx_free);
4460         INIT_LIST_HEAD(&rxq->rx_used);
4461         /* Fill the rx_used queue with _all_ of the Rx buffers */
4462         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4463                 /* In the reset function, these buffers may have been allocated
4464                  * to an SKB, so we need to unmap and free potential storage */
4465                 if (rxq->pool[i].skb != NULL) {
4466                         pci_unmap_single(priv->pci_dev,
4467                                          rxq->pool[i].dma_addr,
4468                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4469                         priv->alloc_rxb_skb--;
4470                         dev_kfree_skb(rxq->pool[i].skb);
4471                         rxq->pool[i].skb = NULL;
4472                 }
4473                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4474         }
4475
4476         /* Set us so that we have processed and used all buffers, but have
4477          * not restocked the Rx queue with fresh buffers */
4478         rxq->read = rxq->write = 0;
4479         rxq->free_count = 0;
4480         spin_unlock_irqrestore(&rxq->lock, flags);
4481 }
4482
4483 /* Convert linear signal-to-noise ratio into dB */
4484 static u8 ratio2dB[100] = {
4485 /*       0   1   2   3   4   5   6   7   8   9 */
4486          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4487         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4488         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4489         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4490         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4491         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4492         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4493         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4494         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4495         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4496 };
4497
4498 /* Calculates a relative dB value from a ratio of linear
4499  *   (i.e. not dB) signal levels.
4500  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4501 int iwl_calc_db_from_ratio(int sig_ratio)
4502 {
4503         /* 1000:1 or higher just report as 60 dB */
4504         if (sig_ratio >= 1000)
4505                 return 60;
4506
4507         /* 100:1 or higher, divide by 10 and use table,
4508          *   add 20 dB to make up for divide by 10 */
4509         if (sig_ratio >= 100)
4510                 return (20 + (int)ratio2dB[sig_ratio/10]);
4511
4512         /* We shouldn't see this */
4513         if (sig_ratio < 1)
4514                 return 0;
4515
4516         /* Use table for ratios 1:1 - 99:1 */
4517         return (int)ratio2dB[sig_ratio];
4518 }
4519
4520 #define PERFECT_RSSI (-20) /* dBm */
4521 #define WORST_RSSI (-95)   /* dBm */
4522 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4523
4524 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4525  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4526  *   about formulas used below. */
4527 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4528 {
4529         int sig_qual;
4530         int degradation = PERFECT_RSSI - rssi_dbm;
4531
4532         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4533          * as indicator; formula is (signal dbm - noise dbm).
4534          * SNR at or above 40 is a great signal (100%).
4535          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4536          * Weakest usable signal is usually 10 - 15 dB SNR. */
4537         if (noise_dbm) {
4538                 if (rssi_dbm - noise_dbm >= 40)
4539                         return 100;
4540                 else if (rssi_dbm < noise_dbm)
4541                         return 0;
4542                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4543
4544         /* Else use just the signal level.
4545          * This formula is a least squares fit of data points collected and
4546          *   compared with a reference system that had a percentage (%) display
4547          *   for signal quality. */
4548         } else
4549                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4550                             (15 * RSSI_RANGE + 62 * degradation)) /
4551                            (RSSI_RANGE * RSSI_RANGE);
4552
4553         if (sig_qual > 100)
4554                 sig_qual = 100;
4555         else if (sig_qual < 1)
4556                 sig_qual = 0;
4557
4558         return sig_qual;
4559 }
4560
4561 /**
4562  * iwl_rx_handle - Main entry function for receiving responses from the uCode
4563  *
4564  * Uses the priv->rx_handlers callback function array to invoke
4565  * the appropriate handlers, including command responses,
4566  * frame-received notifications, and other notifications.
4567  */
4568 static void iwl_rx_handle(struct iwl_priv *priv)
4569 {
4570         struct iwl_rx_mem_buffer *rxb;
4571         struct iwl_rx_packet *pkt;
4572         struct iwl_rx_queue *rxq = &priv->rxq;
4573         u32 r, i;
4574         int reclaim;
4575         unsigned long flags;
4576
4577         r = iwl_hw_get_rx_read(priv);
4578         i = rxq->read;
4579
4580         /* Rx interrupt, but nothing sent from uCode */
4581         if (i == r)
4582                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4583
4584         while (i != r) {
4585                 rxb = rxq->queue[i];
4586
4587                 /* If an RXB doesn't have a queue slot associated with it
4588                  * then a bug has been introduced in the queue refilling
4589                  * routines -- catch it here */
4590                 BUG_ON(rxb == NULL);
4591
4592                 rxq->queue[i] = NULL;
4593
4594                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4595                                             IWL_RX_BUF_SIZE,
4596                                             PCI_DMA_FROMDEVICE);
4597                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4598
4599                 /* Reclaim a command buffer only if this packet is a response
4600                  *   to a (driver-originated) command.
4601                  * If the packet (e.g. Rx frame) originated from uCode,
4602                  *   there is no command buffer to reclaim.
4603                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4604                  *   but apparently a few don't get set; catch them here. */
4605                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4606                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4607                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4608                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4609                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4610                         (pkt->hdr.cmd != REPLY_TX);
4611
4612                 /* Based on type of command response or notification,
4613                  *   handle those that need handling via function in
4614                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
4615                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4616                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4617                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4618                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4619                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4620                 } else {
4621                         /* No handling needed */
4622                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4623                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4624                                 r, i, get_cmd_string(pkt->hdr.cmd),
4625                                 pkt->hdr.cmd);
4626                 }
4627
4628                 if (reclaim) {
4629                         /* Invoke any callbacks, transfer the skb to caller,
4630                          * and fire off the (possibly) blocking iwl_send_cmd()
4631                          * as we reclaim the driver command queue */
4632                         if (rxb && rxb->skb)
4633                                 iwl_tx_cmd_complete(priv, rxb);
4634                         else
4635                                 IWL_WARNING("Claim null rxb?\n");
4636                 }
4637
4638                 /* For now we just don't re-use anything.  We can tweak this
4639                  * later to try and re-use notification packets and SKBs that
4640                  * fail to Rx correctly */
4641                 if (rxb->skb != NULL) {
4642                         priv->alloc_rxb_skb--;
4643                         dev_kfree_skb_any(rxb->skb);
4644                         rxb->skb = NULL;
4645                 }
4646
4647                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4648                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4649                 spin_lock_irqsave(&rxq->lock, flags);
4650                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4651                 spin_unlock_irqrestore(&rxq->lock, flags);
4652                 i = (i + 1) & RX_QUEUE_MASK;
4653         }
4654
4655         /* Backtrack one entry */
4656         priv->rxq.read = i;
4657         iwl_rx_queue_restock(priv);
4658 }
4659
4660 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4661                                   struct iwl_tx_queue *txq)
4662 {
4663         u32 reg = 0;
4664         int rc = 0;
4665         int txq_id = txq->q.id;
4666
4667         if (txq->need_update == 0)
4668                 return rc;
4669
4670         /* if we're trying to save power */
4671         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4672                 /* wake up nic if it's powered down ...
4673                  * uCode will wake up, and interrupt us again, so next
4674                  * time we'll skip this part. */
4675                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4676
4677                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4678                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4679                         iwl_set_bit(priv, CSR_GP_CNTRL,
4680                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4681                         return rc;
4682                 }
4683
4684                 /* restore this queue's parameters in nic hardware. */
4685                 rc = iwl_grab_nic_access(priv);
4686                 if (rc)
4687                         return rc;
4688                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
4689                                      txq->q.write_ptr | (txq_id << 8));
4690                 iwl_release_nic_access(priv);
4691
4692         /* else not in power-save mode, uCode will never sleep when we're
4693          * trying to tx (during RFKILL, we're not trying to tx). */
4694         } else
4695                 iwl_write32(priv, HBUS_TARG_WRPTR,
4696                             txq->q.write_ptr | (txq_id << 8));
4697
4698         txq->need_update = 0;
4699
4700         return rc;
4701 }
4702
4703 #ifdef CONFIG_IWLWIFI_DEBUG
4704 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4705 {
4706         DECLARE_MAC_BUF(mac);
4707
4708         IWL_DEBUG_RADIO("RX CONFIG:\n");
4709         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4710         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4711         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4712         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4713                         le32_to_cpu(rxon->filter_flags));
4714         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4715         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4716                         rxon->ofdm_basic_rates);
4717         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4718         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4719                         print_mac(mac, rxon->node_addr));
4720         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4721                         print_mac(mac, rxon->bssid_addr));
4722         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4723 }
4724 #endif
4725
4726 static void iwl_enable_interrupts(struct iwl_priv *priv)
4727 {
4728         IWL_DEBUG_ISR("Enabling interrupts\n");
4729         set_bit(STATUS_INT_ENABLED, &priv->status);
4730         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4731 }
4732
4733 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4734 {
4735         clear_bit(STATUS_INT_ENABLED, &priv->status);
4736
4737         /* disable interrupts from uCode/NIC to host */
4738         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4739
4740         /* acknowledge/clear/reset any interrupts still pending
4741          * from uCode or flow handler (Rx/Tx DMA) */
4742         iwl_write32(priv, CSR_INT, 0xffffffff);
4743         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4744         IWL_DEBUG_ISR("Disabled interrupts\n");
4745 }
4746
4747 static const char *desc_lookup(int i)
4748 {
4749         switch (i) {
4750         case 1:
4751                 return "FAIL";
4752         case 2:
4753                 return "BAD_PARAM";
4754         case 3:
4755                 return "BAD_CHECKSUM";
4756         case 4:
4757                 return "NMI_INTERRUPT";
4758         case 5:
4759                 return "SYSASSERT";
4760         case 6:
4761                 return "FATAL_ERROR";
4762         }
4763
4764         return "UNKNOWN";
4765 }
4766
4767 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4768 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4769
4770 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4771 {
4772         u32 data2, line;
4773         u32 desc, time, count, base, data1;
4774         u32 blink1, blink2, ilink1, ilink2;
4775         int rc;
4776
4777         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4778
4779         if (!iwl_hw_valid_rtc_data_addr(base)) {
4780                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4781                 return;
4782         }
4783
4784         rc = iwl_grab_nic_access(priv);
4785         if (rc) {
4786                 IWL_WARNING("Can not read from adapter at this time.\n");
4787                 return;
4788         }
4789
4790         count = iwl_read_targ_mem(priv, base);
4791
4792         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4793                 IWL_ERROR("Start IWL Error Log Dump:\n");
4794                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4795                           priv->status, priv->config, count);
4796         }
4797
4798         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4799         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4800         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4801         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4802         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4803         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4804         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4805         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4806         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4807
4808         IWL_ERROR("Desc               Time       "
4809                   "data1      data2      line\n");
4810         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4811                   desc_lookup(desc), desc, time, data1, data2, line);
4812         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4813         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4814                   ilink1, ilink2);
4815
4816         iwl_release_nic_access(priv);
4817 }
4818
4819 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4820
4821 /**
4822  * iwl_print_event_log - Dump error event log to syslog
4823  *
4824  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4825  */
4826 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4827                                 u32 num_events, u32 mode)
4828 {
4829         u32 i;
4830         u32 base;       /* SRAM byte address of event log header */
4831         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4832         u32 ptr;        /* SRAM byte address of log data */
4833         u32 ev, time, data; /* event log data */
4834
4835         if (num_events == 0)
4836                 return;
4837
4838         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4839
4840         if (mode == 0)
4841                 event_size = 2 * sizeof(u32);
4842         else
4843                 event_size = 3 * sizeof(u32);
4844
4845         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4846
4847         /* "time" is actually "data" for mode 0 (no timestamp).
4848          * place event id # at far right for easier visual parsing. */
4849         for (i = 0; i < num_events; i++) {
4850                 ev = iwl_read_targ_mem(priv, ptr);
4851                 ptr += sizeof(u32);
4852                 time = iwl_read_targ_mem(priv, ptr);
4853                 ptr += sizeof(u32);
4854                 if (mode == 0)
4855                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4856                 else {
4857                         data = iwl_read_targ_mem(priv, ptr);
4858                         ptr += sizeof(u32);
4859                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4860                 }
4861         }
4862 }
4863
4864 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4865 {
4866         int rc;
4867         u32 base;       /* SRAM byte address of event log header */
4868         u32 capacity;   /* event log capacity in # entries */
4869         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4870         u32 num_wraps;  /* # times uCode wrapped to top of log */
4871         u32 next_entry; /* index of next entry to be written by uCode */
4872         u32 size;       /* # entries that we'll print */
4873
4874         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4875         if (!iwl_hw_valid_rtc_data_addr(base)) {
4876                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4877                 return;
4878         }
4879
4880         rc = iwl_grab_nic_access(priv);
4881         if (rc) {
4882                 IWL_WARNING("Can not read from adapter at this time.\n");
4883                 return;
4884         }
4885
4886         /* event log header */
4887         capacity = iwl_read_targ_mem(priv, base);
4888         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4889         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4890         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4891
4892         size = num_wraps ? capacity : next_entry;
4893
4894         /* bail out if nothing in log */
4895         if (size == 0) {
4896                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4897                 iwl_release_nic_access(priv);
4898                 return;
4899         }
4900
4901         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4902                   size, num_wraps);
4903
4904         /* if uCode has wrapped back to top of log, start at the oldest entry,
4905          * i.e the next one that uCode would fill. */
4906         if (num_wraps)
4907                 iwl_print_event_log(priv, next_entry,
4908                                     capacity - next_entry, mode);
4909
4910         /* (then/else) start at top of log */
4911         iwl_print_event_log(priv, 0, next_entry, mode);
4912
4913         iwl_release_nic_access(priv);
4914 }
4915
4916 /**
4917  * iwl_irq_handle_error - called for HW or SW error interrupt from card
4918  */
4919 static void iwl_irq_handle_error(struct iwl_priv *priv)
4920 {
4921         /* Set the FW error flag -- cleared on iwl_down */
4922         set_bit(STATUS_FW_ERROR, &priv->status);
4923
4924         /* Cancel currently queued command. */
4925         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4926
4927 #ifdef CONFIG_IWLWIFI_DEBUG
4928         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4929                 iwl_dump_nic_error_log(priv);
4930                 iwl_dump_nic_event_log(priv);
4931                 iwl_print_rx_config_cmd(&priv->staging_rxon);
4932         }
4933 #endif
4934
4935         wake_up_interruptible(&priv->wait_command_queue);
4936
4937         /* Keep the restart process from trying to send host
4938          * commands by clearing the INIT status bit */
4939         clear_bit(STATUS_READY, &priv->status);
4940
4941         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4942                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4943                           "Restarting adapter due to uCode error.\n");
4944
4945                 if (iwl_is_associated(priv)) {
4946                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4947                                sizeof(priv->recovery_rxon));
4948                         priv->error_recovering = 1;
4949                 }
4950                 queue_work(priv->workqueue, &priv->restart);
4951         }
4952 }
4953
4954 static void iwl_error_recovery(struct iwl_priv *priv)
4955 {
4956         unsigned long flags;
4957
4958         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4959                sizeof(priv->staging_rxon));
4960         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4961         iwl_commit_rxon(priv);
4962
4963         iwl_rxon_add_station(priv, priv->bssid, 1);
4964
4965         spin_lock_irqsave(&priv->lock, flags);
4966         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4967         priv->error_recovering = 0;
4968         spin_unlock_irqrestore(&priv->lock, flags);
4969 }
4970
4971 static void iwl_irq_tasklet(struct iwl_priv *priv)
4972 {
4973         u32 inta, handled = 0;
4974         u32 inta_fh;
4975         unsigned long flags;
4976 #ifdef CONFIG_IWLWIFI_DEBUG
4977         u32 inta_mask;
4978 #endif
4979
4980         spin_lock_irqsave(&priv->lock, flags);
4981
4982         /* Ack/clear/reset pending uCode interrupts.
4983          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4984          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4985         inta = iwl_read32(priv, CSR_INT);
4986         iwl_write32(priv, CSR_INT, inta);
4987
4988         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4989          * Any new interrupts that happen after this, either while we're
4990          * in this tasklet, or later, will show up in next ISR/tasklet. */
4991         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4992         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4993
4994 #ifdef CONFIG_IWLWIFI_DEBUG
4995         if (iwl_debug_level & IWL_DL_ISR) {
4996                 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4997                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4998                               inta, inta_mask, inta_fh);
4999         }
5000 #endif
5001
5002         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5003          * atomic, make sure that inta covers all the interrupts that
5004          * we've discovered, even if FH interrupt came in just after
5005          * reading CSR_INT. */
5006         if (inta_fh & CSR_FH_INT_RX_MASK)
5007                 inta |= CSR_INT_BIT_FH_RX;
5008         if (inta_fh & CSR_FH_INT_TX_MASK)
5009                 inta |= CSR_INT_BIT_FH_TX;
5010
5011         /* Now service all interrupt bits discovered above. */
5012         if (inta & CSR_INT_BIT_HW_ERR) {
5013                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5014
5015                 /* Tell the device to stop sending interrupts */
5016                 iwl_disable_interrupts(priv);
5017
5018                 iwl_irq_handle_error(priv);
5019
5020                 handled |= CSR_INT_BIT_HW_ERR;
5021
5022                 spin_unlock_irqrestore(&priv->lock, flags);
5023
5024                 return;
5025         }
5026
5027 #ifdef CONFIG_IWLWIFI_DEBUG
5028         if (iwl_debug_level & (IWL_DL_ISR)) {
5029                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5030                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5031                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
5032
5033                 /* Alive notification via Rx interrupt will do the real work */
5034                 if (inta & CSR_INT_BIT_ALIVE)
5035                         IWL_DEBUG_ISR("Alive interrupt\n");
5036         }
5037 #endif
5038         /* Safely ignore these bits for debug checks below */
5039         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5040
5041         /* HW RF KILL switch toggled (4965 only) */
5042         if (inta & CSR_INT_BIT_RF_KILL) {
5043                 int hw_rf_kill = 0;
5044                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
5045                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5046                         hw_rf_kill = 1;
5047
5048                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5049                                 "RF_KILL bit toggled to %s.\n",
5050                                 hw_rf_kill ? "disable radio":"enable radio");
5051
5052                 /* Queue restart only if RF_KILL switch was set to "kill"
5053                  *   when we loaded driver, and is now set to "enable".
5054                  * After we're Alive, RF_KILL gets handled by
5055                  *   iwl_rx_card_state_notif() */
5056                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5057                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
5058                         queue_work(priv->workqueue, &priv->restart);
5059                 }
5060
5061                 handled |= CSR_INT_BIT_RF_KILL;
5062         }
5063
5064         /* Chip got too hot and stopped itself (4965 only) */
5065         if (inta & CSR_INT_BIT_CT_KILL) {
5066                 IWL_ERROR("Microcode CT kill error detected.\n");
5067                 handled |= CSR_INT_BIT_CT_KILL;
5068         }
5069
5070         /* Error detected by uCode */
5071         if (inta & CSR_INT_BIT_SW_ERR) {
5072                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5073                           inta);
5074                 iwl_irq_handle_error(priv);
5075                 handled |= CSR_INT_BIT_SW_ERR;
5076         }
5077
5078         /* uCode wakes up after power-down sleep */
5079         if (inta & CSR_INT_BIT_WAKEUP) {
5080                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5081                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
5082                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5083                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5084                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5085                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5086                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5087                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5088
5089                 handled |= CSR_INT_BIT_WAKEUP;
5090         }
5091
5092         /* All uCode command responses, including Tx command responses,
5093          * Rx "responses" (frame-received notification), and other
5094          * notifications from uCode come through here*/
5095         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5096                 iwl_rx_handle(priv);
5097                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5098         }
5099
5100         if (inta & CSR_INT_BIT_FH_TX) {
5101                 IWL_DEBUG_ISR("Tx interrupt\n");
5102                 handled |= CSR_INT_BIT_FH_TX;
5103         }
5104
5105         if (inta & ~handled)
5106                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5107
5108         if (inta & ~CSR_INI_SET_MASK) {
5109                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5110                          inta & ~CSR_INI_SET_MASK);
5111                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5112         }
5113
5114         /* Re-enable all interrupts */
5115         iwl_enable_interrupts(priv);
5116
5117 #ifdef CONFIG_IWLWIFI_DEBUG
5118         if (iwl_debug_level & (IWL_DL_ISR)) {
5119                 inta = iwl_read32(priv, CSR_INT);
5120                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
5121                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5122                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5123                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5124         }
5125 #endif
5126         spin_unlock_irqrestore(&priv->lock, flags);
5127 }
5128
5129 static irqreturn_t iwl_isr(int irq, void *data)
5130 {
5131         struct iwl_priv *priv = data;
5132         u32 inta, inta_mask;
5133         u32 inta_fh;
5134         if (!priv)
5135                 return IRQ_NONE;
5136
5137         spin_lock(&priv->lock);
5138
5139         /* Disable (but don't clear!) interrupts here to avoid
5140          *    back-to-back ISRs and sporadic interrupts from our NIC.
5141          * If we have something to service, the tasklet will re-enable ints.
5142          * If we *don't* have something, we'll re-enable before leaving here. */
5143         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
5144         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
5145
5146         /* Discover which interrupts are active/pending */
5147         inta = iwl_read32(priv, CSR_INT);
5148         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5149
5150         /* Ignore interrupt if there's nothing in NIC to service.
5151          * This may be due to IRQ shared with another device,
5152          * or due to sporadic interrupts thrown from our NIC. */
5153         if (!inta && !inta_fh) {
5154                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5155                 goto none;
5156         }
5157
5158         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5159                 /* Hardware disappeared. It might have already raised
5160                  * an interrupt */
5161                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5162                 goto unplugged;
5163         }
5164
5165         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5166                       inta, inta_mask, inta_fh);
5167
5168         /* iwl_irq_tasklet() will service interrupts and re-enable them */
5169         tasklet_schedule(&priv->irq_tasklet);
5170
5171  unplugged:
5172         spin_unlock(&priv->lock);
5173         return IRQ_HANDLED;
5174
5175  none:
5176         /* re-enable interrupts here since we don't have anything to service. */
5177         iwl_enable_interrupts(priv);
5178         spin_unlock(&priv->lock);
5179         return IRQ_NONE;
5180 }
5181
5182 /************************** EEPROM BANDS ****************************
5183  *
5184  * The iwl_eeprom_band definitions below provide the mapping from the
5185  * EEPROM contents to the specific channel number supported for each
5186  * band.
5187  *
5188  * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
5189  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5190  * The specific geography and calibration information for that channel
5191  * is contained in the eeprom map itself.
5192  *
5193  * During init, we copy the eeprom information and channel map
5194  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5195  *
5196  * channel_map_24/52 provides the index in the channel_info array for a
5197  * given channel.  We have to have two separate maps as there is channel
5198  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5199  * band_2
5200  *
5201  * A value of 0xff stored in the channel_map indicates that the channel
5202  * is not supported by the hardware at all.
5203  *
5204  * A value of 0xfe in the channel_map indicates that the channel is not
5205  * valid for Tx with the current hardware.  This means that
5206  * while the system can tune and receive on a given channel, it may not
5207  * be able to associate or transmit any frames on that
5208  * channel.  There is no corresponding channel information for that
5209  * entry.
5210  *
5211  *********************************************************************/
5212
5213 /* 2.4 GHz */
5214 static const u8 iwl_eeprom_band_1[14] = {
5215         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5216 };
5217
5218 /* 5.2 GHz bands */
5219 static const u8 iwl_eeprom_band_2[] = {
5220         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5221 };
5222
5223 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
5224         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5225 };
5226
5227 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
5228         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5229 };
5230
5231 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
5232         145, 149, 153, 157, 161, 165
5233 };
5234
5235 static u8 iwl_eeprom_band_6[] = {       /* 2.4 FAT channel */
5236         1, 2, 3, 4, 5, 6, 7
5237 };
5238
5239 static u8 iwl_eeprom_band_7[] = {       /* 5.2 FAT channel */
5240         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5241 };
5242
5243 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
5244                                     int *eeprom_ch_count,
5245                                     const struct iwl_eeprom_channel
5246                                     **eeprom_ch_info,
5247                                     const u8 **eeprom_ch_index)
5248 {
5249         switch (band) {
5250         case 1:         /* 2.4GHz band */
5251                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
5252                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5253                 *eeprom_ch_index = iwl_eeprom_band_1;
5254                 break;
5255         case 2:         /* 5.2GHz band */
5256                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
5257                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5258                 *eeprom_ch_index = iwl_eeprom_band_2;
5259                 break;
5260         case 3:         /* 5.2GHz band */
5261                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
5262                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5263                 *eeprom_ch_index = iwl_eeprom_band_3;
5264                 break;
5265         case 4:         /* 5.2GHz band */
5266                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
5267                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5268                 *eeprom_ch_index = iwl_eeprom_band_4;
5269                 break;
5270         case 5:         /* 5.2GHz band */
5271                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
5272                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5273                 *eeprom_ch_index = iwl_eeprom_band_5;
5274                 break;
5275         case 6:
5276                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
5277                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5278                 *eeprom_ch_index = iwl_eeprom_band_6;
5279                 break;
5280         case 7:
5281                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
5282                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5283                 *eeprom_ch_index = iwl_eeprom_band_7;
5284                 break;
5285         default:
5286                 BUG();
5287                 return;
5288         }
5289 }
5290
5291 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
5292                                                     int phymode, u16 channel)
5293 {
5294         int i;
5295
5296         switch (phymode) {
5297         case MODE_IEEE80211A:
5298                 for (i = 14; i < priv->channel_count; i++) {
5299                         if (priv->channel_info[i].channel == channel)
5300                                 return &priv->channel_info[i];
5301                 }
5302                 break;
5303
5304         case MODE_IEEE80211B:
5305         case MODE_IEEE80211G:
5306                 if (channel >= 1 && channel <= 14)
5307                         return &priv->channel_info[channel - 1];
5308                 break;
5309
5310         }
5311
5312         return NULL;
5313 }
5314
5315 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5316                             ? # x " " : "")
5317
5318 static int iwl_init_channel_map(struct iwl_priv *priv)
5319 {
5320         int eeprom_ch_count = 0;
5321         const u8 *eeprom_ch_index = NULL;
5322         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5323         int band, ch;
5324         struct iwl_channel_info *ch_info;
5325
5326         if (priv->channel_count) {
5327                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5328                 return 0;
5329         }
5330
5331         if (priv->eeprom.version < 0x2f) {
5332                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5333                             priv->eeprom.version);
5334                 return -EINVAL;
5335         }
5336
5337         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5338
5339         priv->channel_count =
5340             ARRAY_SIZE(iwl_eeprom_band_1) +
5341             ARRAY_SIZE(iwl_eeprom_band_2) +
5342             ARRAY_SIZE(iwl_eeprom_band_3) +
5343             ARRAY_SIZE(iwl_eeprom_band_4) +
5344             ARRAY_SIZE(iwl_eeprom_band_5);
5345
5346         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5347
5348         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5349                                      priv->channel_count, GFP_KERNEL);
5350         if (!priv->channel_info) {
5351                 IWL_ERROR("Could not allocate channel_info\n");
5352                 priv->channel_count = 0;
5353                 return -ENOMEM;
5354         }
5355
5356         ch_info = priv->channel_info;
5357
5358         /* Loop through the 5 EEPROM bands adding them in order to the
5359          * channel map we maintain (that contains additional information than
5360          * what just in the EEPROM) */
5361         for (band = 1; band <= 5; band++) {
5362
5363                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5364                                         &eeprom_ch_info, &eeprom_ch_index);
5365
5366                 /* Loop through each band adding each of the channels */
5367                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5368                         ch_info->channel = eeprom_ch_index[ch];
5369                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5370                             MODE_IEEE80211A;
5371
5372                         /* permanently store EEPROM's channel regulatory flags
5373                          *   and max power in channel info database. */
5374                         ch_info->eeprom = eeprom_ch_info[ch];
5375
5376                         /* Copy the run-time flags so they are there even on
5377                          * invalid channels */
5378                         ch_info->flags = eeprom_ch_info[ch].flags;
5379
5380                         if (!(is_channel_valid(ch_info))) {
5381                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5382                                                "No traffic\n",
5383                                                ch_info->channel,
5384                                                ch_info->flags,
5385                                                is_channel_a_band(ch_info) ?
5386                                                "5.2" : "2.4");
5387                                 ch_info++;
5388                                 continue;
5389                         }
5390
5391                         /* Initialize regulatory-based run-time data */
5392                         ch_info->max_power_avg = ch_info->curr_txpow =
5393                             eeprom_ch_info[ch].max_power_avg;
5394                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5395                         ch_info->min_power = 0;
5396
5397                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5398                                        " %ddBm): Ad-Hoc %ssupported\n",
5399                                        ch_info->channel,
5400                                        is_channel_a_band(ch_info) ?
5401                                        "5.2" : "2.4",
5402                                        CHECK_AND_PRINT(IBSS),
5403                                        CHECK_AND_PRINT(ACTIVE),
5404                                        CHECK_AND_PRINT(RADAR),
5405                                        CHECK_AND_PRINT(WIDE),
5406                                        CHECK_AND_PRINT(NARROW),
5407                                        CHECK_AND_PRINT(DFS),
5408                                        eeprom_ch_info[ch].flags,
5409                                        eeprom_ch_info[ch].max_power_avg,
5410                                        ((eeprom_ch_info[ch].
5411                                          flags & EEPROM_CHANNEL_IBSS)
5412                                         && !(eeprom_ch_info[ch].
5413                                              flags & EEPROM_CHANNEL_RADAR))
5414                                        ? "" : "not ");
5415
5416                         /* Set the user_txpower_limit to the highest power
5417                          * supported by any channel */
5418                         if (eeprom_ch_info[ch].max_power_avg >
5419                             priv->user_txpower_limit)
5420                                 priv->user_txpower_limit =
5421                                     eeprom_ch_info[ch].max_power_avg;
5422
5423                         ch_info++;
5424                 }
5425         }
5426
5427         for (band = 6; band <= 7; band++) {
5428                 int phymode;
5429                 u8 fat_extension_chan;
5430
5431                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5432                                         &eeprom_ch_info, &eeprom_ch_index);
5433
5434                 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5435                 /* Loop through each band adding each of the channels */
5436                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5437
5438                         if ((band == 6) &&
5439                             ((eeprom_ch_index[ch] == 5) ||
5440                             (eeprom_ch_index[ch] == 6) ||
5441                             (eeprom_ch_index[ch] == 7)))
5442                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5443                         else
5444                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5445
5446                         iwl4965_set_fat_chan_info(priv, phymode,
5447                                                   eeprom_ch_index[ch],
5448                                                   &(eeprom_ch_info[ch]),
5449                                                   fat_extension_chan);
5450
5451                         iwl4965_set_fat_chan_info(priv, phymode,
5452                                                   (eeprom_ch_index[ch] + 4),
5453                                                   &(eeprom_ch_info[ch]),
5454                                                   HT_IE_EXT_CHANNEL_BELOW);
5455                 }
5456         }
5457
5458         return 0;
5459 }
5460
5461 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5462  * sending probe req.  This should be set long enough to hear probe responses
5463  * from more than one AP.  */
5464 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5465 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5466
5467 /* For faster active scanning, scan will move to the next channel if fewer than
5468  * PLCP_QUIET_THRESH packets are heard on this channel within
5469  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5470  * time if it's a quiet channel (nothing responded to our probe, and there's
5471  * no other traffic).
5472  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5473 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5474 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5475
5476 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5477  * Must be set longer than active dwell time.
5478  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5479 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5480 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5481 #define IWL_PASSIVE_DWELL_BASE      (100)
5482 #define IWL_CHANNEL_TUNE_TIME       5
5483
5484 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5485 {
5486         if (phymode == MODE_IEEE80211A)
5487                 return IWL_ACTIVE_DWELL_TIME_52;
5488         else
5489                 return IWL_ACTIVE_DWELL_TIME_24;
5490 }
5491
5492 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5493 {
5494         u16 active = iwl_get_active_dwell_time(priv, phymode);
5495         u16 passive = (phymode != MODE_IEEE80211A) ?
5496             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5497             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5498
5499         if (iwl_is_associated(priv)) {
5500                 /* If we're associated, we clamp the maximum passive
5501                  * dwell time to be 98% of the beacon interval (minus
5502                  * 2 * channel tune time) */
5503                 passive = priv->beacon_int;
5504                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5505                         passive = IWL_PASSIVE_DWELL_BASE;
5506                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5507         }
5508
5509         if (passive <= active)
5510                 passive = active + 1;
5511
5512         return passive;
5513 }
5514
5515 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5516                                      u8 is_active, u8 direct_mask,
5517                                      struct iwl_scan_channel *scan_ch)
5518 {
5519         const struct ieee80211_channel *channels = NULL;
5520         const struct ieee80211_hw_mode *hw_mode;
5521         const struct iwl_channel_info *ch_info;
5522         u16 passive_dwell = 0;
5523         u16 active_dwell = 0;
5524         int added, i;
5525
5526         hw_mode = iwl_get_hw_mode(priv, phymode);
5527         if (!hw_mode)
5528                 return 0;
5529
5530         channels = hw_mode->channels;
5531
5532         active_dwell = iwl_get_active_dwell_time(priv, phymode);
5533         passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5534
5535         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5536                 if (channels[i].chan ==
5537                     le16_to_cpu(priv->active_rxon.channel)) {
5538                         if (iwl_is_associated(priv)) {
5539                                 IWL_DEBUG_SCAN
5540                                     ("Skipping current channel %d\n",
5541                                      le16_to_cpu(priv->active_rxon.channel));
5542                                 continue;
5543                         }
5544                 } else if (priv->only_active_channel)
5545                         continue;
5546
5547                 scan_ch->channel = channels[i].chan;
5548
5549                 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5550                 if (!is_channel_valid(ch_info)) {
5551                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5552                                        scan_ch->channel);
5553                         continue;
5554                 }
5555
5556                 if (!is_active || is_channel_passive(ch_info) ||
5557                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5558                         scan_ch->type = 0;      /* passive */
5559                 else
5560                         scan_ch->type = 1;      /* active */
5561
5562                 if (scan_ch->type & 1)
5563                         scan_ch->type |= (direct_mask << 1);
5564
5565                 if (is_channel_narrow(ch_info))
5566                         scan_ch->type |= (1 << 7);
5567
5568                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5569                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5570
5571                 /* Set power levels to defaults */
5572                 scan_ch->tpc.dsp_atten = 110;
5573                 /* scan_pwr_info->tpc.dsp_atten; */
5574
5575                 /*scan_pwr_info->tpc.tx_gain; */
5576                 if (phymode == MODE_IEEE80211A)
5577                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5578                 else {
5579                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5580                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5581                          * power level
5582                          scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5583                          */
5584                 }
5585
5586                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5587                                scan_ch->channel,
5588                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5589                                (scan_ch->type & 1) ?
5590                                active_dwell : passive_dwell);
5591
5592                 scan_ch++;
5593                 added++;
5594         }
5595
5596         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5597         return added;
5598 }
5599
5600 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5601 {
5602         int i, j;
5603         for (i = 0; i < 3; i++) {
5604                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5605                 for (j = 0; j < hw_mode->num_channels; j++)
5606                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5607         }
5608 }
5609
5610 static void iwl_init_hw_rates(struct iwl_priv *priv,
5611                               struct ieee80211_rate *rates)
5612 {
5613         int i;
5614
5615         for (i = 0; i < IWL_RATE_COUNT; i++) {
5616                 rates[i].rate = iwl_rates[i].ieee * 5;
5617                 rates[i].val = i; /* Rate scaling will work on indexes */
5618                 rates[i].val2 = i;
5619                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5620                 /* Only OFDM have the bits-per-symbol set */
5621                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5622                         rates[i].flags |= IEEE80211_RATE_OFDM;
5623                 else {
5624                         /*
5625                          * If CCK 1M then set rate flag to CCK else CCK_2
5626                          * which is CCK | PREAMBLE2
5627                          */
5628                         rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5629                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5630                 }
5631
5632                 /* Set up which ones are basic rates... */
5633                 if (IWL_BASIC_RATES_MASK & (1 << i))
5634                         rates[i].flags |= IEEE80211_RATE_BASIC;
5635         }
5636
5637         iwl4965_init_hw_rates(priv, rates);
5638 }
5639
5640 /**
5641  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5642  */
5643 static int iwl_init_geos(struct iwl_priv *priv)
5644 {
5645         struct iwl_channel_info *ch;
5646         struct ieee80211_hw_mode *modes;
5647         struct ieee80211_channel *channels;
5648         struct ieee80211_channel *geo_ch;
5649         struct ieee80211_rate *rates;
5650         int i = 0;
5651         enum {
5652                 A = 0,
5653                 B = 1,
5654                 G = 2,
5655                 A_11N = 3,
5656                 G_11N = 4,
5657         };
5658         int mode_count = 5;
5659
5660         if (priv->modes) {
5661                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5662                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5663                 return 0;
5664         }
5665
5666         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5667                         GFP_KERNEL);
5668         if (!modes)
5669                 return -ENOMEM;
5670
5671         channels = kzalloc(sizeof(struct ieee80211_channel) *
5672                            priv->channel_count, GFP_KERNEL);
5673         if (!channels) {
5674                 kfree(modes);
5675                 return -ENOMEM;
5676         }
5677
5678         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5679                         GFP_KERNEL);
5680         if (!rates) {
5681                 kfree(modes);
5682                 kfree(channels);
5683                 return -ENOMEM;
5684         }
5685
5686         /* 0 = 802.11a
5687          * 1 = 802.11b
5688          * 2 = 802.11g
5689          */
5690
5691         /* 5.2GHz channels start after the 2.4GHz channels */
5692         modes[A].mode = MODE_IEEE80211A;
5693         modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5694         modes[A].rates = rates;
5695         modes[A].num_rates = 8; /* just OFDM */
5696         modes[A].rates = &rates[4];
5697         modes[A].num_channels = 0;
5698
5699         modes[B].mode = MODE_IEEE80211B;
5700         modes[B].channels = channels;
5701         modes[B].rates = rates;
5702         modes[B].num_rates = 4; /* just CCK */
5703         modes[B].num_channels = 0;
5704
5705         modes[G].mode = MODE_IEEE80211G;
5706         modes[G].channels = channels;
5707         modes[G].rates = rates;
5708         modes[G].num_rates = 12;        /* OFDM & CCK */
5709         modes[G].num_channels = 0;
5710
5711         modes[G_11N].mode = MODE_IEEE80211G;
5712         modes[G_11N].channels = channels;
5713         modes[G_11N].num_rates = 13;        /* OFDM & CCK */
5714         modes[G_11N].rates = rates;
5715         modes[G_11N].num_channels = 0;
5716
5717         modes[A_11N].mode = MODE_IEEE80211A;
5718         modes[A_11N].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5719         modes[A_11N].rates = &rates[4];
5720         modes[A_11N].num_rates = 9; /* just OFDM */
5721         modes[A_11N].num_channels = 0;
5722
5723         priv->ieee_channels = channels;
5724         priv->ieee_rates = rates;
5725
5726         iwl_init_hw_rates(priv, rates);
5727
5728         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5729                 ch = &priv->channel_info[i];
5730
5731                 if (!is_channel_valid(ch)) {
5732                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5733                                     "skipping.\n",
5734                                     ch->channel, is_channel_a_band(ch) ?
5735                                     "5.2" : "2.4");
5736                         continue;
5737                 }
5738
5739                 if (is_channel_a_band(ch)) {
5740                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5741                         modes[A_11N].num_channels++;
5742                 } else {
5743                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5744                         modes[G].num_channels++;
5745                         modes[G_11N].num_channels++;
5746                 }
5747
5748                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5749                 geo_ch->chan = ch->channel;
5750                 geo_ch->power_level = ch->max_power_avg;
5751                 geo_ch->antenna_max = 0xff;
5752
5753                 if (is_channel_valid(ch)) {
5754                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5755                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5756                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5757
5758                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5759                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5760
5761                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5762                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5763
5764                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5765                                 priv->max_channel_txpower_limit =
5766                                     ch->max_power_avg;
5767                 }
5768
5769                 geo_ch->val = geo_ch->flag;
5770         }
5771
5772         if ((modes[A].num_channels == 0) && priv->is_abg) {
5773                 printk(KERN_INFO DRV_NAME
5774                        ": Incorrectly detected BG card as ABG.  Please send "
5775                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5776                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5777                 priv->is_abg = 0;
5778         }
5779
5780         printk(KERN_INFO DRV_NAME
5781                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5782                modes[G].num_channels, modes[A].num_channels);
5783
5784         /*
5785          * NOTE:  We register these in preference of order -- the
5786          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5787          * a phymode based on rates or AP capabilities but seems to
5788          * configure it purely on if the channel being configured
5789          * is supported by a mode -- and the first match is taken
5790          */
5791
5792         if (modes[G].num_channels)
5793                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5794         if (modes[B].num_channels)
5795                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5796         if (modes[A].num_channels)
5797                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5798
5799         priv->modes = modes;
5800         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5801
5802         return 0;
5803 }
5804
5805 /******************************************************************************
5806  *
5807  * uCode download functions
5808  *
5809  ******************************************************************************/
5810
5811 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5812 {
5813         if (priv->ucode_code.v_addr != NULL) {
5814                 pci_free_consistent(priv->pci_dev,
5815                                     priv->ucode_code.len,
5816                                     priv->ucode_code.v_addr,
5817                                     priv->ucode_code.p_addr);
5818                 priv->ucode_code.v_addr = NULL;
5819         }
5820         if (priv->ucode_data.v_addr != NULL) {
5821                 pci_free_consistent(priv->pci_dev,
5822                                     priv->ucode_data.len,
5823                                     priv->ucode_data.v_addr,
5824                                     priv->ucode_data.p_addr);
5825                 priv->ucode_data.v_addr = NULL;
5826         }
5827         if (priv->ucode_data_backup.v_addr != NULL) {
5828                 pci_free_consistent(priv->pci_dev,
5829                                     priv->ucode_data_backup.len,
5830                                     priv->ucode_data_backup.v_addr,
5831                                     priv->ucode_data_backup.p_addr);
5832                 priv->ucode_data_backup.v_addr = NULL;
5833         }
5834         if (priv->ucode_init.v_addr != NULL) {
5835                 pci_free_consistent(priv->pci_dev,
5836                                     priv->ucode_init.len,
5837                                     priv->ucode_init.v_addr,
5838                                     priv->ucode_init.p_addr);
5839                 priv->ucode_init.v_addr = NULL;
5840         }
5841         if (priv->ucode_init_data.v_addr != NULL) {
5842                 pci_free_consistent(priv->pci_dev,
5843                                     priv->ucode_init_data.len,
5844                                     priv->ucode_init_data.v_addr,
5845                                     priv->ucode_init_data.p_addr);
5846                 priv->ucode_init_data.v_addr = NULL;
5847         }
5848         if (priv->ucode_boot.v_addr != NULL) {
5849                 pci_free_consistent(priv->pci_dev,
5850                                     priv->ucode_boot.len,
5851                                     priv->ucode_boot.v_addr,
5852                                     priv->ucode_boot.p_addr);
5853                 priv->ucode_boot.v_addr = NULL;
5854         }
5855 }
5856
5857 /**
5858  * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5859  *     looking at all data.
5860  */
5861 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5862 {
5863         u32 val;
5864         u32 save_len = len;
5865         int rc = 0;
5866         u32 errcnt;
5867
5868         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5869
5870         rc = iwl_grab_nic_access(priv);
5871         if (rc)
5872                 return rc;
5873
5874         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5875
5876         errcnt = 0;
5877         for (; len > 0; len -= sizeof(u32), image++) {
5878                 /* read data comes through single port, auto-incr addr */
5879                 /* NOTE: Use the debugless read so we don't flood kernel log
5880                  * if IWL_DL_IO is set */
5881                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5882                 if (val != le32_to_cpu(*image)) {
5883                         IWL_ERROR("uCode INST section is invalid at "
5884                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5885                                   save_len - len, val, le32_to_cpu(*image));
5886                         rc = -EIO;
5887                         errcnt++;
5888                         if (errcnt >= 20)
5889                                 break;
5890                 }
5891         }
5892
5893         iwl_release_nic_access(priv);
5894
5895         if (!errcnt)
5896                 IWL_DEBUG_INFO
5897                     ("ucode image in INSTRUCTION memory is good\n");
5898
5899         return rc;
5900 }
5901
5902
5903 /**
5904  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5905  *   using sample data 100 bytes apart.  If these sample points are good,
5906  *   it's a pretty good bet that everything between them is good, too.
5907  */
5908 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5909 {
5910         u32 val;
5911         int rc = 0;
5912         u32 errcnt = 0;
5913         u32 i;
5914
5915         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5916
5917         rc = iwl_grab_nic_access(priv);
5918         if (rc)
5919                 return rc;
5920
5921         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5922                 /* read data comes through single port, auto-incr addr */
5923                 /* NOTE: Use the debugless read so we don't flood kernel log
5924                  * if IWL_DL_IO is set */
5925                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5926                         i + RTC_INST_LOWER_BOUND);
5927                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5928                 if (val != le32_to_cpu(*image)) {
5929 #if 0 /* Enable this if you want to see details */
5930                         IWL_ERROR("uCode INST section is invalid at "
5931                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5932                                   i, val, *image);
5933 #endif
5934                         rc = -EIO;
5935                         errcnt++;
5936                         if (errcnt >= 3)
5937                                 break;
5938                 }
5939         }
5940
5941         iwl_release_nic_access(priv);
5942
5943         return rc;
5944 }
5945
5946
5947 /**
5948  * iwl_verify_ucode - determine which instruction image is in SRAM,
5949  *    and verify its contents
5950  */
5951 static int iwl_verify_ucode(struct iwl_priv *priv)
5952 {
5953         __le32 *image;
5954         u32 len;
5955         int rc = 0;
5956
5957         /* Try bootstrap */
5958         image = (__le32 *)priv->ucode_boot.v_addr;
5959         len = priv->ucode_boot.len;
5960         rc = iwl_verify_inst_sparse(priv, image, len);
5961         if (rc == 0) {
5962                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5963                 return 0;
5964         }
5965
5966         /* Try initialize */
5967         image = (__le32 *)priv->ucode_init.v_addr;
5968         len = priv->ucode_init.len;
5969         rc = iwl_verify_inst_sparse(priv, image, len);
5970         if (rc == 0) {
5971                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5972                 return 0;
5973         }
5974
5975         /* Try runtime/protocol */
5976         image = (__le32 *)priv->ucode_code.v_addr;
5977         len = priv->ucode_code.len;
5978         rc = iwl_verify_inst_sparse(priv, image, len);
5979         if (rc == 0) {
5980                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5981                 return 0;
5982         }
5983
5984         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5985
5986         /* Show first several data entries in instruction SRAM.
5987          * Selection of bootstrap image is arbitrary. */
5988         image = (__le32 *)priv->ucode_boot.v_addr;
5989         len = priv->ucode_boot.len;
5990         rc = iwl_verify_inst_full(priv, image, len);
5991
5992         return rc;
5993 }
5994
5995
5996 /* check contents of special bootstrap uCode SRAM */
5997 static int iwl_verify_bsm(struct iwl_priv *priv)
5998 {
5999         __le32 *image = priv->ucode_boot.v_addr;
6000         u32 len = priv->ucode_boot.len;
6001         u32 reg;
6002         u32 val;
6003
6004         IWL_DEBUG_INFO("Begin verify bsm\n");
6005
6006         /* verify BSM SRAM contents */
6007         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
6008         for (reg = BSM_SRAM_LOWER_BOUND;
6009              reg < BSM_SRAM_LOWER_BOUND + len;
6010              reg += sizeof(u32), image ++) {
6011                 val = iwl_read_prph(priv, reg);
6012                 if (val != le32_to_cpu(*image)) {
6013                         IWL_ERROR("BSM uCode verification failed at "
6014                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6015                                   BSM_SRAM_LOWER_BOUND,
6016                                   reg - BSM_SRAM_LOWER_BOUND, len,
6017                                   val, le32_to_cpu(*image));
6018                         return -EIO;
6019                 }
6020         }
6021
6022         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6023
6024         return 0;
6025 }
6026
6027 /**
6028  * iwl_load_bsm - Load bootstrap instructions
6029  *
6030  * BSM operation:
6031  *
6032  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6033  * in special SRAM that does not power down during RFKILL.  When powering back
6034  * up after power-saving sleeps (or during initial uCode load), the BSM loads
6035  * the bootstrap program into the on-board processor, and starts it.
6036  *
6037  * The bootstrap program loads (via DMA) instructions and data for a new
6038  * program from host DRAM locations indicated by the host driver in the
6039  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
6040  * automatically.
6041  *
6042  * When initializing the NIC, the host driver points the BSM to the
6043  * "initialize" uCode image.  This uCode sets up some internal data, then
6044  * notifies host via "initialize alive" that it is complete.
6045  *
6046  * The host then replaces the BSM_DRAM_* pointer values to point to the
6047  * normal runtime uCode instructions and a backup uCode data cache buffer
6048  * (filled initially with starting data values for the on-board processor),
6049  * then triggers the "initialize" uCode to load and launch the runtime uCode,
6050  * which begins normal operation.
6051  *
6052  * When doing a power-save shutdown, runtime uCode saves data SRAM into
6053  * the backup data cache in DRAM before SRAM is powered down.
6054  *
6055  * When powering back up, the BSM loads the bootstrap program.  This reloads
6056  * the runtime uCode instructions and the backup data cache into SRAM,
6057  * and re-launches the runtime uCode from where it left off.
6058  */
6059 static int iwl_load_bsm(struct iwl_priv *priv)
6060 {
6061         __le32 *image = priv->ucode_boot.v_addr;
6062         u32 len = priv->ucode_boot.len;
6063         dma_addr_t pinst;
6064         dma_addr_t pdata;
6065         u32 inst_len;
6066         u32 data_len;
6067         int rc;
6068         int i;
6069         u32 done;
6070         u32 reg_offset;
6071
6072         IWL_DEBUG_INFO("Begin load bsm\n");
6073
6074         /* make sure bootstrap program is no larger than BSM's SRAM size */
6075         if (len > IWL_MAX_BSM_SIZE)
6076                 return -EINVAL;
6077
6078         /* Tell bootstrap uCode where to find the "Initialize" uCode
6079          *   in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
6080          * NOTE:  iwl_initialize_alive_start() will replace these values,
6081          *        after the "initialize" uCode has run, to point to
6082          *        runtime/protocol instructions and backup data cache. */
6083         pinst = priv->ucode_init.p_addr >> 4;
6084         pdata = priv->ucode_init_data.p_addr >> 4;
6085         inst_len = priv->ucode_init.len;
6086         data_len = priv->ucode_init_data.len;
6087
6088         rc = iwl_grab_nic_access(priv);
6089         if (rc)
6090                 return rc;
6091
6092         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6093         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6094         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6095         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6096
6097         /* Fill BSM memory with bootstrap instructions */
6098         for (reg_offset = BSM_SRAM_LOWER_BOUND;
6099              reg_offset < BSM_SRAM_LOWER_BOUND + len;
6100              reg_offset += sizeof(u32), image++)
6101                 _iwl_write_prph(priv, reg_offset,
6102                                           le32_to_cpu(*image));
6103
6104         rc = iwl_verify_bsm(priv);
6105         if (rc) {
6106                 iwl_release_nic_access(priv);
6107                 return rc;
6108         }
6109
6110         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6111         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
6112         iwl_write_prph(priv, BSM_WR_MEM_DST_REG,
6113                                  RTC_INST_LOWER_BOUND);
6114         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6115
6116         /* Load bootstrap code into instruction SRAM now,
6117          *   to prepare to load "initialize" uCode */
6118         iwl_write_prph(priv, BSM_WR_CTRL_REG,
6119                 BSM_WR_CTRL_REG_BIT_START);
6120
6121         /* Wait for load of bootstrap uCode to finish */
6122         for (i = 0; i < 100; i++) {
6123                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
6124                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6125                         break;
6126                 udelay(10);
6127         }
6128         if (i < 100)
6129                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6130         else {
6131                 IWL_ERROR("BSM write did not complete!\n");
6132                 return -EIO;
6133         }
6134
6135         /* Enable future boot loads whenever power management unit triggers it
6136          *   (e.g. when powering back up after power-save shutdown) */
6137         iwl_write_prph(priv, BSM_WR_CTRL_REG,
6138                 BSM_WR_CTRL_REG_BIT_START_EN);
6139
6140         iwl_release_nic_access(priv);
6141
6142         return 0;
6143 }
6144
6145 static void iwl_nic_start(struct iwl_priv *priv)
6146 {
6147         /* Remove all resets to allow NIC to operate */
6148         iwl_write32(priv, CSR_RESET, 0);
6149 }
6150
6151 /**
6152  * iwl_read_ucode - Read uCode images from disk file.
6153  *
6154  * Copy into buffers for card to fetch via bus-mastering
6155  */
6156 static int iwl_read_ucode(struct iwl_priv *priv)
6157 {
6158         struct iwl_ucode *ucode;
6159         int rc = 0;
6160         const struct firmware *ucode_raw;
6161         const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6162         u8 *src;
6163         size_t len;
6164         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6165
6166         /* Ask kernel firmware_class module to get the boot firmware off disk.
6167          * request_firmware() is synchronous, file is in memory on return. */
6168         rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6169         if (rc < 0) {
6170                 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
6171                 goto error;
6172         }
6173
6174         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6175                        name, ucode_raw->size);
6176
6177         /* Make sure that we got at least our header! */
6178         if (ucode_raw->size < sizeof(*ucode)) {
6179                 IWL_ERROR("File size way too small!\n");
6180                 rc = -EINVAL;
6181                 goto err_release;
6182         }
6183
6184         /* Data from ucode file:  header followed by uCode images */
6185         ucode = (void *)ucode_raw->data;
6186
6187         ver = le32_to_cpu(ucode->ver);
6188         inst_size = le32_to_cpu(ucode->inst_size);
6189         data_size = le32_to_cpu(ucode->data_size);
6190         init_size = le32_to_cpu(ucode->init_size);
6191         init_data_size = le32_to_cpu(ucode->init_data_size);
6192         boot_size = le32_to_cpu(ucode->boot_size);
6193
6194         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6195         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6196                        inst_size);
6197         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6198                        data_size);
6199         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6200                        init_size);
6201         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6202                        init_data_size);
6203         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6204                        boot_size);
6205
6206         /* Verify size of file vs. image size info in file's header */
6207         if (ucode_raw->size < sizeof(*ucode) +
6208                 inst_size + data_size + init_size +
6209                 init_data_size + boot_size) {
6210
6211                 IWL_DEBUG_INFO("uCode file size %d too small\n",
6212                                (int)ucode_raw->size);
6213                 rc = -EINVAL;
6214                 goto err_release;
6215         }
6216
6217         /* Verify that uCode images will fit in card's SRAM */
6218         if (inst_size > IWL_MAX_INST_SIZE) {
6219                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
6220                                (int)inst_size);
6221                 rc = -EINVAL;
6222                 goto err_release;
6223         }
6224
6225         if (data_size > IWL_MAX_DATA_SIZE) {
6226                 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
6227                                (int)data_size);
6228                 rc = -EINVAL;
6229                 goto err_release;
6230         }
6231         if (init_size > IWL_MAX_INST_SIZE) {
6232                 IWL_DEBUG_INFO
6233                     ("uCode init instr len %d too large to fit in card\n",
6234                      (int)init_size);
6235                 rc = -EINVAL;
6236                 goto err_release;
6237         }
6238         if (init_data_size > IWL_MAX_DATA_SIZE) {
6239                 IWL_DEBUG_INFO
6240                     ("uCode init data len %d too large to fit in card\n",
6241                      (int)init_data_size);
6242                 rc = -EINVAL;
6243                 goto err_release;
6244         }
6245         if (boot_size > IWL_MAX_BSM_SIZE) {
6246                 IWL_DEBUG_INFO
6247                     ("uCode boot instr len %d too large to fit in bsm\n",
6248                      (int)boot_size);
6249                 rc = -EINVAL;
6250                 goto err_release;
6251         }
6252
6253         /* Allocate ucode buffers for card's bus-master loading ... */
6254
6255         /* Runtime instructions and 2 copies of data:
6256          * 1) unmodified from disk
6257          * 2) backup cache for save/restore during power-downs */
6258         priv->ucode_code.len = inst_size;
6259         priv->ucode_code.v_addr =
6260             pci_alloc_consistent(priv->pci_dev,
6261                                  priv->ucode_code.len,
6262                                  &(priv->ucode_code.p_addr));
6263
6264         priv->ucode_data.len = data_size;
6265         priv->ucode_data.v_addr =
6266             pci_alloc_consistent(priv->pci_dev,
6267                                  priv->ucode_data.len,
6268                                  &(priv->ucode_data.p_addr));
6269
6270         priv->ucode_data_backup.len = data_size;
6271         priv->ucode_data_backup.v_addr =
6272             pci_alloc_consistent(priv->pci_dev,
6273                                  priv->ucode_data_backup.len,
6274                                  &(priv->ucode_data_backup.p_addr));
6275
6276
6277         /* Initialization instructions and data */
6278         priv->ucode_init.len = init_size;
6279         priv->ucode_init.v_addr =
6280             pci_alloc_consistent(priv->pci_dev,
6281                                  priv->ucode_init.len,
6282                                  &(priv->ucode_init.p_addr));
6283
6284         priv->ucode_init_data.len = init_data_size;
6285         priv->ucode_init_data.v_addr =
6286             pci_alloc_consistent(priv->pci_dev,
6287                                  priv->ucode_init_data.len,
6288                                  &(priv->ucode_init_data.p_addr));
6289
6290         /* Bootstrap (instructions only, no data) */
6291         priv->ucode_boot.len = boot_size;
6292         priv->ucode_boot.v_addr =
6293             pci_alloc_consistent(priv->pci_dev,
6294                                  priv->ucode_boot.len,
6295                                  &(priv->ucode_boot.p_addr));
6296
6297         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
6298             !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
6299             !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
6300                 goto err_pci_alloc;
6301
6302         /* Copy images into buffers for card's bus-master reads ... */
6303
6304         /* Runtime instructions (first block of data in file) */
6305         src = &ucode->data[0];
6306         len = priv->ucode_code.len;
6307         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
6308                        (int)len);
6309         memcpy(priv->ucode_code.v_addr, src, len);
6310         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6311                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6312
6313         /* Runtime data (2nd block)
6314          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
6315         src = &ucode->data[inst_size];
6316         len = priv->ucode_data.len;
6317         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
6318                        (int)len);
6319         memcpy(priv->ucode_data.v_addr, src, len);
6320         memcpy(priv->ucode_data_backup.v_addr, src, len);
6321
6322         /* Initialization instructions (3rd block) */
6323         if (init_size) {
6324                 src = &ucode->data[inst_size + data_size];
6325                 len = priv->ucode_init.len;
6326                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
6327                                (int)len);
6328                 memcpy(priv->ucode_init.v_addr, src, len);
6329         }
6330
6331         /* Initialization data (4th block) */
6332         if (init_data_size) {
6333                 src = &ucode->data[inst_size + data_size + init_size];
6334                 len = priv->ucode_init_data.len;
6335                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6336                                (int)len);
6337                 memcpy(priv->ucode_init_data.v_addr, src, len);
6338         }
6339
6340         /* Bootstrap instructions (5th block) */
6341         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6342         len = priv->ucode_boot.len;
6343         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6344                        (int)len);
6345         memcpy(priv->ucode_boot.v_addr, src, len);
6346
6347         /* We have our copies now, allow OS release its copies */
6348         release_firmware(ucode_raw);
6349         return 0;
6350
6351  err_pci_alloc:
6352         IWL_ERROR("failed to allocate pci memory\n");
6353         rc = -ENOMEM;
6354         iwl_dealloc_ucode_pci(priv);
6355
6356  err_release:
6357         release_firmware(ucode_raw);
6358
6359  error:
6360         return rc;
6361 }
6362
6363
6364 /**
6365  * iwl_set_ucode_ptrs - Set uCode address location
6366  *
6367  * Tell initialization uCode where to find runtime uCode.
6368  *
6369  * BSM registers initially contain pointers to initialization uCode.
6370  * We need to replace them to load runtime uCode inst and data,
6371  * and to save runtime data when powering down.
6372  */
6373 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6374 {
6375         dma_addr_t pinst;
6376         dma_addr_t pdata;
6377         int rc = 0;
6378         unsigned long flags;
6379
6380         /* bits 35:4 for 4965 */
6381         pinst = priv->ucode_code.p_addr >> 4;
6382         pdata = priv->ucode_data_backup.p_addr >> 4;
6383
6384         spin_lock_irqsave(&priv->lock, flags);
6385         rc = iwl_grab_nic_access(priv);
6386         if (rc) {
6387                 spin_unlock_irqrestore(&priv->lock, flags);
6388                 return rc;
6389         }
6390
6391         /* Tell bootstrap uCode where to find image to load */
6392         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6393         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6394         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6395                                  priv->ucode_data.len);
6396
6397         /* Inst bytecount must be last to set up, bit 31 signals uCode
6398          *   that all new ptr/size info is in place */
6399         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6400                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6401
6402         iwl_release_nic_access(priv);
6403
6404         spin_unlock_irqrestore(&priv->lock, flags);
6405
6406         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6407
6408         return rc;
6409 }
6410
6411 /**
6412  * iwl_init_alive_start - Called after REPLY_ALIVE notification received
6413  *
6414  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6415  *
6416  * The 4965 "initialize" ALIVE reply contains calibration data for:
6417  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6418  *   (3945 does not contain this data).
6419  *
6420  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6421 */
6422 static void iwl_init_alive_start(struct iwl_priv *priv)
6423 {
6424         /* Check alive response for "valid" sign from uCode */
6425         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6426                 /* We had an error bringing up the hardware, so take it
6427                  * all the way back down so we can try again */
6428                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6429                 goto restart;
6430         }
6431
6432         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6433          * This is a paranoid check, because we would not have gotten the
6434          * "initialize" alive if code weren't properly loaded.  */
6435         if (iwl_verify_ucode(priv)) {
6436                 /* Runtime instruction load was bad;
6437                  * take it all the way back down so we can try again */
6438                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6439                 goto restart;
6440         }
6441
6442         /* Calculate temperature */
6443         priv->temperature = iwl4965_get_temperature(priv);
6444
6445         /* Send pointers to protocol/runtime uCode image ... init code will
6446          * load and launch runtime uCode, which will send us another "Alive"
6447          * notification. */
6448         IWL_DEBUG_INFO("Initialization Alive received.\n");
6449         if (iwl_set_ucode_ptrs(priv)) {
6450                 /* Runtime instruction load won't happen;
6451                  * take it all the way back down so we can try again */
6452                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6453                 goto restart;
6454         }
6455         return;
6456
6457  restart:
6458         queue_work(priv->workqueue, &priv->restart);
6459 }
6460
6461
6462 /**
6463  * iwl_alive_start - called after REPLY_ALIVE notification received
6464  *                   from protocol/runtime uCode (initialization uCode's
6465  *                   Alive gets handled by iwl_init_alive_start()).
6466  */
6467 static void iwl_alive_start(struct iwl_priv *priv)
6468 {
6469         int rc = 0;
6470
6471         IWL_DEBUG_INFO("Runtime Alive received.\n");
6472
6473         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6474                 /* We had an error bringing up the hardware, so take it
6475                  * all the way back down so we can try again */
6476                 IWL_DEBUG_INFO("Alive failed.\n");
6477                 goto restart;
6478         }
6479
6480         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6481          * This is a paranoid check, because we would not have gotten the
6482          * "runtime" alive if code weren't properly loaded.  */
6483         if (iwl_verify_ucode(priv)) {
6484                 /* Runtime instruction load was bad;
6485                  * take it all the way back down so we can try again */
6486                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6487                 goto restart;
6488         }
6489
6490         iwl_clear_stations_table(priv);
6491
6492         rc = iwl4965_alive_notify(priv);
6493         if (rc) {
6494                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6495                             rc);
6496                 goto restart;
6497         }
6498
6499         /* After the ALIVE response, we can process host commands */
6500         set_bit(STATUS_ALIVE, &priv->status);
6501
6502         /* Clear out the uCode error bit if it is set */
6503         clear_bit(STATUS_FW_ERROR, &priv->status);
6504
6505         rc = iwl_init_channel_map(priv);
6506         if (rc) {
6507                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6508                 return;
6509         }
6510
6511         iwl_init_geos(priv);
6512
6513         if (iwl_is_rfkill(priv))
6514                 return;
6515
6516         if (!priv->mac80211_registered) {
6517                 /* Unlock so any user space entry points can call back into
6518                  * the driver without a deadlock... */
6519                 mutex_unlock(&priv->mutex);
6520                 iwl_rate_control_register(priv->hw);
6521                 rc = ieee80211_register_hw(priv->hw);
6522                 priv->hw->conf.beacon_int = 100;
6523                 mutex_lock(&priv->mutex);
6524
6525                 if (rc) {
6526                         iwl_rate_control_unregister(priv->hw);
6527                         IWL_ERROR("Failed to register network "
6528                                   "device (error %d)\n", rc);
6529                         return;
6530                 }
6531
6532                 priv->mac80211_registered = 1;
6533
6534                 iwl_reset_channel_flag(priv);
6535         } else
6536                 ieee80211_start_queues(priv->hw);
6537
6538         priv->active_rate = priv->rates_mask;
6539         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6540
6541         iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6542
6543         if (iwl_is_associated(priv)) {
6544                 struct iwl_rxon_cmd *active_rxon =
6545                                 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6546
6547                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6548                        sizeof(priv->staging_rxon));
6549                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6550         } else {
6551                 /* Initialize our rx_config data */
6552                 iwl_connection_init_rx_config(priv);
6553                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6554         }
6555
6556         /* Configure BT coexistence */
6557         iwl_send_bt_config(priv);
6558
6559         /* Configure the adapter for unassociated operation */
6560         iwl_commit_rxon(priv);
6561
6562         /* At this point, the NIC is initialized and operational */
6563         priv->notif_missed_beacons = 0;
6564         set_bit(STATUS_READY, &priv->status);
6565
6566         iwl4965_rf_kill_ct_config(priv);
6567         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6568
6569         if (priv->error_recovering)
6570                 iwl_error_recovery(priv);
6571
6572         return;
6573
6574  restart:
6575         queue_work(priv->workqueue, &priv->restart);
6576 }
6577
6578 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6579
6580 static void __iwl_down(struct iwl_priv *priv)
6581 {
6582         unsigned long flags;
6583         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6584         struct ieee80211_conf *conf = NULL;
6585
6586         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6587
6588         conf = ieee80211_get_hw_conf(priv->hw);
6589
6590         if (!exit_pending)
6591                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6592
6593         iwl_clear_stations_table(priv);
6594
6595         /* Unblock any waiting calls */
6596         wake_up_interruptible_all(&priv->wait_command_queue);
6597
6598         /* Wipe out the EXIT_PENDING status bit if we are not actually
6599          * exiting the module */
6600         if (!exit_pending)
6601                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6602
6603         /* stop and reset the on-board processor */
6604         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6605
6606         /* tell the device to stop sending interrupts */
6607         iwl_disable_interrupts(priv);
6608
6609         if (priv->mac80211_registered)
6610                 ieee80211_stop_queues(priv->hw);
6611
6612         /* If we have not previously called iwl_init() then
6613          * clear all bits but the RF Kill and SUSPEND bits and return */
6614         if (!iwl_is_init(priv)) {
6615                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6616                                         STATUS_RF_KILL_HW |
6617                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6618                                         STATUS_RF_KILL_SW |
6619                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6620                                         STATUS_IN_SUSPEND;
6621                 goto exit;
6622         }
6623
6624         /* ...otherwise clear out all the status bits but the RF Kill and
6625          * SUSPEND bits and continue taking the NIC down. */
6626         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6627                                 STATUS_RF_KILL_HW |
6628                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6629                                 STATUS_RF_KILL_SW |
6630                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6631                                 STATUS_IN_SUSPEND |
6632                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6633                                 STATUS_FW_ERROR;
6634
6635         spin_lock_irqsave(&priv->lock, flags);
6636         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6637         spin_unlock_irqrestore(&priv->lock, flags);
6638
6639         iwl_hw_txq_ctx_stop(priv);
6640         iwl_hw_rxq_stop(priv);
6641
6642         spin_lock_irqsave(&priv->lock, flags);
6643         if (!iwl_grab_nic_access(priv)) {
6644                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
6645                                          APMG_CLK_VAL_DMA_CLK_RQT);
6646                 iwl_release_nic_access(priv);
6647         }
6648         spin_unlock_irqrestore(&priv->lock, flags);
6649
6650         udelay(5);
6651
6652         iwl_hw_nic_stop_master(priv);
6653         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6654         iwl_hw_nic_reset(priv);
6655
6656  exit:
6657         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6658
6659         if (priv->ibss_beacon)
6660                 dev_kfree_skb(priv->ibss_beacon);
6661         priv->ibss_beacon = NULL;
6662
6663         /* clear out any free frames */
6664         iwl_clear_free_frames(priv);
6665 }
6666
6667 static void iwl_down(struct iwl_priv *priv)
6668 {
6669         mutex_lock(&priv->mutex);
6670         __iwl_down(priv);
6671         mutex_unlock(&priv->mutex);
6672
6673         iwl_cancel_deferred_work(priv);
6674 }
6675
6676 #define MAX_HW_RESTARTS 5
6677
6678 static int __iwl_up(struct iwl_priv *priv)
6679 {
6680         DECLARE_MAC_BUF(mac);
6681         int rc, i;
6682         u32 hw_rf_kill = 0;
6683
6684         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6685                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6686                 return -EIO;
6687         }
6688
6689         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6690                 IWL_WARNING("Radio disabled by SW RF kill (module "
6691                             "parameter)\n");
6692                 return 0;
6693         }
6694
6695         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6696                 IWL_ERROR("ucode not available for device bringup\n");
6697                 return -EIO;
6698         }
6699
6700         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6701
6702         rc = iwl_hw_nic_init(priv);
6703         if (rc) {
6704                 IWL_ERROR("Unable to int nic\n");
6705                 return rc;
6706         }
6707
6708         /* make sure rfkill handshake bits are cleared */
6709         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6710         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6711                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6712
6713         /* clear (again), then enable host interrupts */
6714         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6715         iwl_enable_interrupts(priv);
6716
6717         /* really make sure rfkill handshake bits are cleared */
6718         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6719         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6720
6721         /* Copy original ucode data image from disk into backup cache.
6722          * This will be used to initialize the on-board processor's
6723          * data SRAM for a clean start when the runtime program first loads. */
6724         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6725                         priv->ucode_data.len);
6726
6727         /* If platform's RF_KILL switch is set to KILL,
6728          * wait for BIT_INT_RF_KILL interrupt before loading uCode
6729          * and getting things started */
6730         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
6731                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
6732                 hw_rf_kill = 1;
6733
6734         if (test_bit(STATUS_RF_KILL_HW, &priv->status) || hw_rf_kill) {
6735                 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6736                 return 0;
6737         }
6738
6739         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6740
6741                 iwl_clear_stations_table(priv);
6742
6743                 /* load bootstrap state machine,
6744                  * load bootstrap program into processor's memory,
6745                  * prepare to load the "initialize" uCode */
6746                 rc = iwl_load_bsm(priv);
6747
6748                 if (rc) {
6749                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6750                         continue;
6751                 }
6752
6753                 /* start card; "initialize" will load runtime ucode */
6754                 iwl_nic_start(priv);
6755
6756                 /* MAC Address location in EEPROM same for 3945/4965 */
6757                 get_eeprom_mac(priv, priv->mac_addr);
6758                 IWL_DEBUG_INFO("MAC address: %s\n",
6759                                print_mac(mac, priv->mac_addr));
6760
6761                 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6762
6763                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6764
6765                 return 0;
6766         }
6767
6768         set_bit(STATUS_EXIT_PENDING, &priv->status);
6769         __iwl_down(priv);
6770
6771         /* tried to restart and config the device for as long as our
6772          * patience could withstand */
6773         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6774         return -EIO;
6775 }
6776
6777
6778 /*****************************************************************************
6779  *
6780  * Workqueue callbacks
6781  *
6782  *****************************************************************************/
6783
6784 static void iwl_bg_init_alive_start(struct work_struct *data)
6785 {
6786         struct iwl_priv *priv =
6787             container_of(data, struct iwl_priv, init_alive_start.work);
6788
6789         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6790                 return;
6791
6792         mutex_lock(&priv->mutex);
6793         iwl_init_alive_start(priv);
6794         mutex_unlock(&priv->mutex);
6795 }
6796
6797 static void iwl_bg_alive_start(struct work_struct *data)
6798 {
6799         struct iwl_priv *priv =
6800             container_of(data, struct iwl_priv, alive_start.work);
6801
6802         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6803                 return;
6804
6805         mutex_lock(&priv->mutex);
6806         iwl_alive_start(priv);
6807         mutex_unlock(&priv->mutex);
6808 }
6809
6810 static void iwl_bg_rf_kill(struct work_struct *work)
6811 {
6812         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6813
6814         wake_up_interruptible(&priv->wait_command_queue);
6815
6816         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6817                 return;
6818
6819         mutex_lock(&priv->mutex);
6820
6821         if (!iwl_is_rfkill(priv)) {
6822                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6823                           "HW and/or SW RF Kill no longer active, restarting "
6824                           "device\n");
6825                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6826                         queue_work(priv->workqueue, &priv->restart);
6827         } else {
6828
6829                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6830                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6831                                           "disabled by SW switch\n");
6832                 else
6833                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6834                                     "Kill switch must be turned off for "
6835                                     "wireless networking to work.\n");
6836         }
6837         mutex_unlock(&priv->mutex);
6838 }
6839
6840 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6841
6842 static void iwl_bg_scan_check(struct work_struct *data)
6843 {
6844         struct iwl_priv *priv =
6845             container_of(data, struct iwl_priv, scan_check.work);
6846
6847         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6848                 return;
6849
6850         mutex_lock(&priv->mutex);
6851         if (test_bit(STATUS_SCANNING, &priv->status) ||
6852             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6853                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6854                           "Scan completion watchdog resetting adapter (%dms)\n",
6855                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6856
6857                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6858                         iwl_send_scan_abort(priv);
6859         }
6860         mutex_unlock(&priv->mutex);
6861 }
6862
6863 static void iwl_bg_request_scan(struct work_struct *data)
6864 {
6865         struct iwl_priv *priv =
6866             container_of(data, struct iwl_priv, request_scan);
6867         struct iwl_host_cmd cmd = {
6868                 .id = REPLY_SCAN_CMD,
6869                 .len = sizeof(struct iwl_scan_cmd),
6870                 .meta.flags = CMD_SIZE_HUGE,
6871         };
6872         int rc = 0;
6873         struct iwl_scan_cmd *scan;
6874         struct ieee80211_conf *conf = NULL;
6875         u8 direct_mask;
6876         int phymode;
6877
6878         conf = ieee80211_get_hw_conf(priv->hw);
6879
6880         mutex_lock(&priv->mutex);
6881
6882         if (!iwl_is_ready(priv)) {
6883                 IWL_WARNING("request scan called when driver not ready.\n");
6884                 goto done;
6885         }
6886
6887         /* Make sure the scan wasn't cancelled before this queued work
6888          * was given the chance to run... */
6889         if (!test_bit(STATUS_SCANNING, &priv->status))
6890                 goto done;
6891
6892         /* This should never be called or scheduled if there is currently
6893          * a scan active in the hardware. */
6894         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6895                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6896                                "Ignoring second request.\n");
6897                 rc = -EIO;
6898                 goto done;
6899         }
6900
6901         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6902                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6903                 goto done;
6904         }
6905
6906         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6907                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6908                 goto done;
6909         }
6910
6911         if (iwl_is_rfkill(priv)) {
6912                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6913                 goto done;
6914         }
6915
6916         if (!test_bit(STATUS_READY, &priv->status)) {
6917                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6918                 goto done;
6919         }
6920
6921         if (!priv->scan_bands) {
6922                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6923                 goto done;
6924         }
6925
6926         if (!priv->scan) {
6927                 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6928                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6929                 if (!priv->scan) {
6930                         rc = -ENOMEM;
6931                         goto done;
6932                 }
6933         }
6934         scan = priv->scan;
6935         memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6936
6937         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6938         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6939
6940         if (iwl_is_associated(priv)) {
6941                 u16 interval = 0;
6942                 u32 extra;
6943                 u32 suspend_time = 100;
6944                 u32 scan_suspend_time = 100;
6945                 unsigned long flags;
6946
6947                 IWL_DEBUG_INFO("Scanning while associated...\n");
6948
6949                 spin_lock_irqsave(&priv->lock, flags);
6950                 interval = priv->beacon_int;
6951                 spin_unlock_irqrestore(&priv->lock, flags);
6952
6953                 scan->suspend_time = 0;
6954                 scan->max_out_time = cpu_to_le32(200 * 1024);
6955                 if (!interval)
6956                         interval = suspend_time;
6957
6958                 extra = (suspend_time / interval) << 22;
6959                 scan_suspend_time = (extra |
6960                     ((suspend_time % interval) * 1024));
6961                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6962                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6963                                scan_suspend_time, interval);
6964         }
6965
6966         /* We should add the ability for user to lock to PASSIVE ONLY */
6967         if (priv->one_direct_scan) {
6968                 IWL_DEBUG_SCAN
6969                     ("Kicking off one direct scan for '%s'\n",
6970                      iwl_escape_essid(priv->direct_ssid,
6971                                       priv->direct_ssid_len));
6972                 scan->direct_scan[0].id = WLAN_EID_SSID;
6973                 scan->direct_scan[0].len = priv->direct_ssid_len;
6974                 memcpy(scan->direct_scan[0].ssid,
6975                        priv->direct_ssid, priv->direct_ssid_len);
6976                 direct_mask = 1;
6977         } else if (!iwl_is_associated(priv) && priv->essid_len) {
6978                 scan->direct_scan[0].id = WLAN_EID_SSID;
6979                 scan->direct_scan[0].len = priv->essid_len;
6980                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6981                 direct_mask = 1;
6982         } else
6983                 direct_mask = 0;
6984
6985         /* We don't build a direct scan probe request; the uCode will do
6986          * that based on the direct_mask added to each channel entry */
6987         scan->tx_cmd.len = cpu_to_le16(
6988                 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6989                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6990         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6991         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6992         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6993
6994         /* flags + rate selection */
6995
6996         scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
6997
6998         switch (priv->scan_bands) {
6999         case 2:
7000                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
7001                 scan->tx_cmd.rate_n_flags =
7002                                 iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
7003                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7004
7005                 scan->good_CRC_th = 0;
7006                 phymode = MODE_IEEE80211G;
7007                 break;
7008
7009         case 1:
7010                 scan->tx_cmd.rate_n_flags =
7011                                 iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7012                                 RATE_MCS_ANT_B_MSK);
7013                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7014                 phymode = MODE_IEEE80211A;
7015                 break;
7016
7017         default:
7018                 IWL_WARNING("Invalid scan band count\n");
7019                 goto done;
7020         }
7021
7022         /* select Rx chains */
7023
7024         /* Force use of chains B and C (0x6) for scan Rx.
7025          * Avoid A (0x1) because of its off-channel reception on A-band.
7026          * MIMO is not used here, but value is required to make uCode happy. */
7027         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7028                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7029                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7030                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7031
7032         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7033                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7034
7035         if (direct_mask)
7036                 IWL_DEBUG_SCAN
7037                     ("Initiating direct scan for %s.\n",
7038                      iwl_escape_essid(priv->essid, priv->essid_len));
7039         else
7040                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7041
7042         scan->channel_count =
7043                 iwl_get_channels_for_scan(
7044                         priv, phymode, 1, /* active */
7045                         direct_mask,
7046                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7047
7048         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7049             scan->channel_count * sizeof(struct iwl_scan_channel);
7050         cmd.data = scan;
7051         scan->len = cpu_to_le16(cmd.len);
7052
7053         set_bit(STATUS_SCAN_HW, &priv->status);
7054         rc = iwl_send_cmd_sync(priv, &cmd);
7055         if (rc)
7056                 goto done;
7057
7058         queue_delayed_work(priv->workqueue, &priv->scan_check,
7059                            IWL_SCAN_CHECK_WATCHDOG);
7060
7061         mutex_unlock(&priv->mutex);
7062         return;
7063
7064  done:
7065         /* inform mac80211 scan aborted */
7066         queue_work(priv->workqueue, &priv->scan_completed);
7067         mutex_unlock(&priv->mutex);
7068 }
7069
7070 static void iwl_bg_up(struct work_struct *data)
7071 {
7072         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
7073
7074         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7075                 return;
7076
7077         mutex_lock(&priv->mutex);
7078         __iwl_up(priv);
7079         mutex_unlock(&priv->mutex);
7080 }
7081
7082 static void iwl_bg_restart(struct work_struct *data)
7083 {
7084         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
7085
7086         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7087                 return;
7088
7089         iwl_down(priv);
7090         queue_work(priv->workqueue, &priv->up);
7091 }
7092
7093 static void iwl_bg_rx_replenish(struct work_struct *data)
7094 {
7095         struct iwl_priv *priv =
7096             container_of(data, struct iwl_priv, rx_replenish);
7097
7098         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7099                 return;
7100
7101         mutex_lock(&priv->mutex);
7102         iwl_rx_replenish(priv);
7103         mutex_unlock(&priv->mutex);
7104 }
7105
7106 static void iwl_bg_post_associate(struct work_struct *data)
7107 {
7108         struct iwl_priv *priv = container_of(data, struct iwl_priv,
7109                                              post_associate.work);
7110
7111         int rc = 0;
7112         struct ieee80211_conf *conf = NULL;
7113         DECLARE_MAC_BUF(mac);
7114
7115         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7116                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7117                 return;
7118         }
7119
7120         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7121                         priv->assoc_id,
7122                         print_mac(mac, priv->active_rxon.bssid_addr));
7123
7124
7125         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7126                 return;
7127
7128         mutex_lock(&priv->mutex);
7129
7130         if (!priv->interface_id || !priv->is_open) {
7131                 mutex_unlock(&priv->mutex);
7132                 return;
7133         }
7134         iwl_scan_cancel_timeout(priv, 200);
7135
7136         conf = ieee80211_get_hw_conf(priv->hw);
7137
7138         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7139         iwl_commit_rxon(priv);
7140
7141         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7142         iwl_setup_rxon_timing(priv);
7143         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7144                               sizeof(priv->rxon_timing), &priv->rxon_timing);
7145         if (rc)
7146                 IWL_WARNING("REPLY_RXON_TIMING failed - "
7147                             "Attempting to continue.\n");
7148
7149         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7150
7151 #ifdef CONFIG_IWLWIFI_HT
7152         if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
7153                 iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
7154         else {
7155                 priv->active_rate_ht[0] = 0;
7156                 priv->active_rate_ht[1] = 0;
7157                 priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
7158         }
7159 #endif /* CONFIG_IWLWIFI_HT*/
7160         iwl4965_set_rxon_chain(priv);
7161         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7162
7163         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7164                         priv->assoc_id, priv->beacon_int);
7165
7166         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7167                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7168         else
7169                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7170
7171         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7172                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7173                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7174                 else
7175                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7176
7177                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7178                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7179
7180         }
7181
7182         iwl_commit_rxon(priv);
7183
7184         switch (priv->iw_mode) {
7185         case IEEE80211_IF_TYPE_STA:
7186                 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
7187                 break;
7188
7189         case IEEE80211_IF_TYPE_IBSS:
7190
7191                 /* clear out the station table */
7192                 iwl_clear_stations_table(priv);
7193
7194                 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7195                 iwl_rxon_add_station(priv, priv->bssid, 0);
7196                 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
7197                 iwl_send_beacon_cmd(priv);
7198
7199                 break;
7200
7201         default:
7202                 IWL_ERROR("%s Should not be called in %d mode\n",
7203                                 __FUNCTION__, priv->iw_mode);
7204                 break;
7205         }
7206
7207         iwl_sequence_reset(priv);
7208
7209 #ifdef CONFIG_IWLWIFI_SENSITIVITY
7210         /* Enable Rx differential gain and sensitivity calibrations */
7211         iwl4965_chain_noise_reset(priv);
7212         priv->start_calib = 1;
7213 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
7214
7215         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7216                 priv->assoc_station_added = 1;
7217
7218 #ifdef CONFIG_IWLWIFI_QOS
7219         iwl_activate_qos(priv, 0);
7220 #endif /* CONFIG_IWLWIFI_QOS */
7221         mutex_unlock(&priv->mutex);
7222 }
7223
7224 static void iwl_bg_abort_scan(struct work_struct *work)
7225 {
7226         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
7227
7228         if (!iwl_is_ready(priv))
7229                 return;
7230
7231         mutex_lock(&priv->mutex);
7232
7233         set_bit(STATUS_SCAN_ABORTING, &priv->status);
7234         iwl_send_scan_abort(priv);
7235
7236         mutex_unlock(&priv->mutex);
7237 }
7238
7239 static void iwl_bg_scan_completed(struct work_struct *work)
7240 {
7241         struct iwl_priv *priv =
7242             container_of(work, struct iwl_priv, scan_completed);
7243
7244         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7245
7246         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7247                 return;
7248
7249         ieee80211_scan_completed(priv->hw);
7250
7251         /* Since setting the TXPOWER may have been deferred while
7252          * performing the scan, fire one off */
7253         mutex_lock(&priv->mutex);
7254         iwl_hw_reg_send_txpower(priv);
7255         mutex_unlock(&priv->mutex);
7256 }
7257
7258 /*****************************************************************************
7259  *
7260  * mac80211 entry point functions
7261  *
7262  *****************************************************************************/
7263
7264 static int iwl_mac_start(struct ieee80211_hw *hw)
7265 {
7266         struct iwl_priv *priv = hw->priv;
7267
7268         IWL_DEBUG_MAC80211("enter\n");
7269
7270         /* we should be verifying the device is ready to be opened */
7271         mutex_lock(&priv->mutex);
7272
7273         priv->is_open = 1;
7274
7275         if (!iwl_is_rfkill(priv))
7276                 ieee80211_start_queues(priv->hw);
7277
7278         mutex_unlock(&priv->mutex);
7279         IWL_DEBUG_MAC80211("leave\n");
7280         return 0;
7281 }
7282
7283 static void iwl_mac_stop(struct ieee80211_hw *hw)
7284 {
7285         struct iwl_priv *priv = hw->priv;
7286
7287         IWL_DEBUG_MAC80211("enter\n");
7288
7289
7290         mutex_lock(&priv->mutex);
7291         /* stop mac, cancel any scan request and clear
7292          * RXON_FILTER_ASSOC_MSK BIT
7293          */
7294         priv->is_open = 0;
7295         iwl_scan_cancel_timeout(priv, 100);
7296         cancel_delayed_work(&priv->post_associate);
7297         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7298         iwl_commit_rxon(priv);
7299         mutex_unlock(&priv->mutex);
7300
7301         IWL_DEBUG_MAC80211("leave\n");
7302 }
7303
7304 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7305                       struct ieee80211_tx_control *ctl)
7306 {
7307         struct iwl_priv *priv = hw->priv;
7308
7309         IWL_DEBUG_MAC80211("enter\n");
7310
7311         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7312                 IWL_DEBUG_MAC80211("leave - monitor\n");
7313                 return -1;
7314         }
7315
7316         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7317                      ctl->tx_rate);
7318
7319         if (iwl_tx_skb(priv, skb, ctl))
7320                 dev_kfree_skb_any(skb);
7321
7322         IWL_DEBUG_MAC80211("leave\n");
7323         return 0;
7324 }
7325
7326 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
7327                                  struct ieee80211_if_init_conf *conf)
7328 {
7329         struct iwl_priv *priv = hw->priv;
7330         unsigned long flags;
7331         DECLARE_MAC_BUF(mac);
7332
7333         IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7334
7335         if (priv->interface_id) {
7336                 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7337                 return 0;
7338         }
7339
7340         spin_lock_irqsave(&priv->lock, flags);
7341         priv->interface_id = conf->if_id;
7342
7343         spin_unlock_irqrestore(&priv->lock, flags);
7344
7345         mutex_lock(&priv->mutex);
7346
7347         if (conf->mac_addr) {
7348                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7349                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7350         }
7351         iwl_set_mode(priv, conf->type);
7352
7353         IWL_DEBUG_MAC80211("leave\n");
7354         mutex_unlock(&priv->mutex);
7355
7356         return 0;
7357 }
7358
7359 /**
7360  * iwl_mac_config - mac80211 config callback
7361  *
7362  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7363  * be set inappropriately and the driver currently sets the hardware up to
7364  * use it whenever needed.
7365  */
7366 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7367 {
7368         struct iwl_priv *priv = hw->priv;
7369         const struct iwl_channel_info *ch_info;
7370         unsigned long flags;
7371
7372         mutex_lock(&priv->mutex);
7373         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7374
7375         if (!iwl_is_ready(priv)) {
7376                 IWL_DEBUG_MAC80211("leave - not ready\n");
7377                 mutex_unlock(&priv->mutex);
7378                 return -EIO;
7379         }
7380
7381         /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7382          * what is exposed through include/ declarations */
7383         if (unlikely(!iwl_param_disable_hw_scan &&
7384                      test_bit(STATUS_SCANNING, &priv->status))) {
7385                 IWL_DEBUG_MAC80211("leave - scanning\n");
7386                 mutex_unlock(&priv->mutex);
7387                 return 0;
7388         }
7389
7390         spin_lock_irqsave(&priv->lock, flags);
7391
7392         ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7393         if (!is_channel_valid(ch_info)) {
7394                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7395                                conf->channel, conf->phymode);
7396                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7397                 spin_unlock_irqrestore(&priv->lock, flags);
7398                 mutex_unlock(&priv->mutex);
7399                 return -EINVAL;
7400         }
7401
7402 #ifdef CONFIG_IWLWIFI_HT
7403         /* if we are switching fron ht to 2.4 clear flags
7404          * from any ht related info since 2.4 does not
7405          * support ht */
7406         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7407 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7408             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7409 #endif
7410         )
7411                 priv->staging_rxon.flags = 0;
7412 #endif /* CONFIG_IWLWIFI_HT */
7413
7414         iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7415
7416         iwl_set_flags_for_phymode(priv, conf->phymode);
7417
7418         /* The list of supported rates and rate mask can be different
7419          * for each phymode; since the phymode may have changed, reset
7420          * the rate mask to what mac80211 lists */
7421         iwl_set_rate(priv);
7422
7423         spin_unlock_irqrestore(&priv->lock, flags);
7424
7425 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7426         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7427                 iwl_hw_channel_switch(priv, conf->channel);
7428                 mutex_unlock(&priv->mutex);
7429                 return 0;
7430         }
7431 #endif
7432
7433         iwl_radio_kill_sw(priv, !conf->radio_enabled);
7434
7435         if (!conf->radio_enabled) {
7436                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7437                 mutex_unlock(&priv->mutex);
7438                 return 0;
7439         }
7440
7441         if (iwl_is_rfkill(priv)) {
7442                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7443                 mutex_unlock(&priv->mutex);
7444                 return -EIO;
7445         }
7446
7447         iwl_set_rate(priv);
7448
7449         if (memcmp(&priv->active_rxon,
7450                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7451                 iwl_commit_rxon(priv);
7452         else
7453                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7454
7455         IWL_DEBUG_MAC80211("leave\n");
7456
7457         mutex_unlock(&priv->mutex);
7458
7459         return 0;
7460 }
7461
7462 static void iwl_config_ap(struct iwl_priv *priv)
7463 {
7464         int rc = 0;
7465
7466         if (priv->status & STATUS_EXIT_PENDING)
7467                 return;
7468
7469         /* The following should be done only at AP bring up */
7470         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7471
7472                 /* RXON - unassoc (to set timing command) */
7473                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7474                 iwl_commit_rxon(priv);
7475
7476                 /* RXON Timing */
7477                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7478                 iwl_setup_rxon_timing(priv);
7479                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7480                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7481                 if (rc)
7482                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7483                                         "Attempting to continue.\n");
7484
7485                 iwl4965_set_rxon_chain(priv);
7486
7487                 /* FIXME: what should be the assoc_id for AP? */
7488                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7489                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7490                         priv->staging_rxon.flags |=
7491                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7492                 else
7493                         priv->staging_rxon.flags &=
7494                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7495
7496                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7497                         if (priv->assoc_capability &
7498                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7499                                 priv->staging_rxon.flags |=
7500                                         RXON_FLG_SHORT_SLOT_MSK;
7501                         else
7502                                 priv->staging_rxon.flags &=
7503                                         ~RXON_FLG_SHORT_SLOT_MSK;
7504
7505                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7506                                 priv->staging_rxon.flags &=
7507                                         ~RXON_FLG_SHORT_SLOT_MSK;
7508                 }
7509                 /* restore RXON assoc */
7510                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7511                 iwl_commit_rxon(priv);
7512 #ifdef CONFIG_IWLWIFI_QOS
7513                 iwl_activate_qos(priv, 1);
7514 #endif
7515                 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7516         }
7517         iwl_send_beacon_cmd(priv);
7518
7519         /* FIXME - we need to add code here to detect a totally new
7520          * configuration, reset the AP, unassoc, rxon timing, assoc,
7521          * clear sta table, add BCAST sta... */
7522 }
7523
7524 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7525                                     struct ieee80211_if_conf *conf)
7526 {
7527         struct iwl_priv *priv = hw->priv;
7528         DECLARE_MAC_BUF(mac);
7529         unsigned long flags;
7530         int rc;
7531
7532         if (conf == NULL)
7533                 return -EIO;
7534
7535         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7536             (!conf->beacon || !conf->ssid_len)) {
7537                 IWL_DEBUG_MAC80211
7538                     ("Leaving in AP mode because HostAPD is not ready.\n");
7539                 return 0;
7540         }
7541
7542         mutex_lock(&priv->mutex);
7543
7544         IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7545         if (conf->bssid)
7546                 IWL_DEBUG_MAC80211("bssid: %s\n",
7547                                    print_mac(mac, conf->bssid));
7548
7549 /*
7550  * very dubious code was here; the probe filtering flag is never set:
7551  *
7552         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7553             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7554  */
7555         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7556                 IWL_DEBUG_MAC80211("leave - scanning\n");
7557                 mutex_unlock(&priv->mutex);
7558                 return 0;
7559         }
7560
7561         if (priv->interface_id != if_id) {
7562                 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7563                 mutex_unlock(&priv->mutex);
7564                 return 0;
7565         }
7566
7567         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7568                 if (!conf->bssid) {
7569                         conf->bssid = priv->mac_addr;
7570                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7571                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7572                                            print_mac(mac, conf->bssid));
7573                 }
7574                 if (priv->ibss_beacon)
7575                         dev_kfree_skb(priv->ibss_beacon);
7576
7577                 priv->ibss_beacon = conf->beacon;
7578         }
7579
7580         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7581             !is_multicast_ether_addr(conf->bssid)) {
7582                 /* If there is currently a HW scan going on in the background
7583                  * then we need to cancel it else the RXON below will fail. */
7584                 if (iwl_scan_cancel_timeout(priv, 100)) {
7585                         IWL_WARNING("Aborted scan still in progress "
7586                                     "after 100ms\n");
7587                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7588                         mutex_unlock(&priv->mutex);
7589                         return -EAGAIN;
7590                 }
7591                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7592
7593                 /* TODO: Audit driver for usage of these members and see
7594                  * if mac80211 deprecates them (priv->bssid looks like it
7595                  * shouldn't be there, but I haven't scanned the IBSS code
7596                  * to verify) - jpk */
7597                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7598
7599                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7600                         iwl_config_ap(priv);
7601                 else {
7602                         rc = iwl_commit_rxon(priv);
7603                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7604                                 iwl_rxon_add_station(
7605                                         priv, priv->active_rxon.bssid_addr, 1);
7606                 }
7607
7608         } else {
7609                 iwl_scan_cancel_timeout(priv, 100);
7610                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7611                 iwl_commit_rxon(priv);
7612         }
7613
7614         spin_lock_irqsave(&priv->lock, flags);
7615         if (!conf->ssid_len)
7616                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7617         else
7618                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7619
7620         priv->essid_len = conf->ssid_len;
7621         spin_unlock_irqrestore(&priv->lock, flags);
7622
7623         IWL_DEBUG_MAC80211("leave\n");
7624         mutex_unlock(&priv->mutex);
7625
7626         return 0;
7627 }
7628
7629 static void iwl_configure_filter(struct ieee80211_hw *hw,
7630                                  unsigned int changed_flags,
7631                                  unsigned int *total_flags,
7632                                  int mc_count, struct dev_addr_list *mc_list)
7633 {
7634         /*
7635          * XXX: dummy
7636          * see also iwl_connection_init_rx_config
7637          */
7638         *total_flags = 0;
7639 }
7640
7641 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7642                                      struct ieee80211_if_init_conf *conf)
7643 {
7644         struct iwl_priv *priv = hw->priv;
7645
7646         IWL_DEBUG_MAC80211("enter\n");
7647
7648         mutex_lock(&priv->mutex);
7649
7650         iwl_scan_cancel_timeout(priv, 100);
7651         cancel_delayed_work(&priv->post_associate);
7652         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7653         iwl_commit_rxon(priv);
7654
7655         if (priv->interface_id == conf->if_id) {
7656                 priv->interface_id = 0;
7657                 memset(priv->bssid, 0, ETH_ALEN);
7658                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7659                 priv->essid_len = 0;
7660         }
7661         mutex_unlock(&priv->mutex);
7662
7663         IWL_DEBUG_MAC80211("leave\n");
7664
7665 }
7666 static void iwl_mac_erp_ie_changed(struct ieee80211_hw *hw,
7667                 u8 changes, int cts_protection, int preamble)
7668 {
7669
7670         struct iwl_priv *priv = hw->priv;
7671
7672         if (changes & IEEE80211_ERP_CHANGE_PREAMBLE) {
7673                 if (preamble == WLAN_ERP_PREAMBLE_SHORT)
7674                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7675                 else
7676                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7677         }
7678
7679         if (changes & IEEE80211_ERP_CHANGE_PROTECTION) {
7680                 if (cts_protection)
7681                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7682                 else
7683                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7684         }
7685
7686         if (iwl_is_associated(priv))
7687                 iwl_send_rxon_assoc(priv);
7688 }
7689
7690 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7691 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7692 {
7693         int rc = 0;
7694         unsigned long flags;
7695         struct iwl_priv *priv = hw->priv;
7696
7697         IWL_DEBUG_MAC80211("enter\n");
7698
7699         mutex_lock(&priv->mutex);
7700         spin_lock_irqsave(&priv->lock, flags);
7701
7702         if (!iwl_is_ready_rf(priv)) {
7703                 rc = -EIO;
7704                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7705                 goto out_unlock;
7706         }
7707
7708         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7709                 rc = -EIO;
7710                 IWL_ERROR("ERROR: APs don't scan\n");
7711                 goto out_unlock;
7712         }
7713
7714         /* if we just finished scan ask for delay */
7715         if (priv->last_scan_jiffies &&
7716             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7717                        jiffies)) {
7718                 rc = -EAGAIN;
7719                 goto out_unlock;
7720         }
7721         if (len) {
7722                 IWL_DEBUG_SCAN("direct scan for  "
7723                                "%s [%d]\n ",
7724                                iwl_escape_essid(ssid, len), (int)len);
7725
7726                 priv->one_direct_scan = 1;
7727                 priv->direct_ssid_len = (u8)
7728                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7729                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7730         } else
7731                 priv->one_direct_scan = 0;
7732
7733         rc = iwl_scan_initiate(priv);
7734
7735         IWL_DEBUG_MAC80211("leave\n");
7736
7737 out_unlock:
7738         spin_unlock_irqrestore(&priv->lock, flags);
7739         mutex_unlock(&priv->mutex);
7740
7741         return rc;
7742 }
7743
7744 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7745                            const u8 *local_addr, const u8 *addr,
7746                            struct ieee80211_key_conf *key)
7747 {
7748         struct iwl_priv *priv = hw->priv;
7749         DECLARE_MAC_BUF(mac);
7750         int rc = 0;
7751         u8 sta_id;
7752
7753         IWL_DEBUG_MAC80211("enter\n");
7754
7755         if (!iwl_param_hwcrypto) {
7756                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7757                 return -EOPNOTSUPP;
7758         }
7759
7760         if (is_zero_ether_addr(addr))
7761                 /* only support pairwise keys */
7762                 return -EOPNOTSUPP;
7763
7764         sta_id = iwl_hw_find_station(priv, addr);
7765         if (sta_id == IWL_INVALID_STATION) {
7766                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7767                                    print_mac(mac, addr));
7768                 return -EINVAL;
7769         }
7770
7771         mutex_lock(&priv->mutex);
7772
7773         iwl_scan_cancel_timeout(priv, 100);
7774
7775         switch (cmd) {
7776         case  SET_KEY:
7777                 rc = iwl_update_sta_key_info(priv, key, sta_id);
7778                 if (!rc) {
7779                         iwl_set_rxon_hwcrypto(priv, 1);
7780                         iwl_commit_rxon(priv);
7781                         key->hw_key_idx = sta_id;
7782                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7783                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7784                 }
7785                 break;
7786         case DISABLE_KEY:
7787                 rc = iwl_clear_sta_key_info(priv, sta_id);
7788                 if (!rc) {
7789                         iwl_set_rxon_hwcrypto(priv, 0);
7790                         iwl_commit_rxon(priv);
7791                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7792                 }
7793                 break;
7794         default:
7795                 rc = -EINVAL;
7796         }
7797
7798         IWL_DEBUG_MAC80211("leave\n");
7799         mutex_unlock(&priv->mutex);
7800
7801         return rc;
7802 }
7803
7804 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7805                            const struct ieee80211_tx_queue_params *params)
7806 {
7807         struct iwl_priv *priv = hw->priv;
7808 #ifdef CONFIG_IWLWIFI_QOS
7809         unsigned long flags;
7810         int q;
7811 #endif /* CONFIG_IWL_QOS */
7812
7813         IWL_DEBUG_MAC80211("enter\n");
7814
7815         if (!iwl_is_ready_rf(priv)) {
7816                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7817                 return -EIO;
7818         }
7819
7820         if (queue >= AC_NUM) {
7821                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7822                 return 0;
7823         }
7824
7825 #ifdef CONFIG_IWLWIFI_QOS
7826         if (!priv->qos_data.qos_enable) {
7827                 priv->qos_data.qos_active = 0;
7828                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7829                 return 0;
7830         }
7831         q = AC_NUM - 1 - queue;
7832
7833         spin_lock_irqsave(&priv->lock, flags);
7834
7835         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7836         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7837         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7838         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7839                         cpu_to_le16((params->burst_time * 100));
7840
7841         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7842         priv->qos_data.qos_active = 1;
7843
7844         spin_unlock_irqrestore(&priv->lock, flags);
7845
7846         mutex_lock(&priv->mutex);
7847         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7848                 iwl_activate_qos(priv, 1);
7849         else if (priv->assoc_id && iwl_is_associated(priv))
7850                 iwl_activate_qos(priv, 0);
7851
7852         mutex_unlock(&priv->mutex);
7853
7854 #endif /*CONFIG_IWLWIFI_QOS */
7855
7856         IWL_DEBUG_MAC80211("leave\n");
7857         return 0;
7858 }
7859
7860 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7861                                 struct ieee80211_tx_queue_stats *stats)
7862 {
7863         struct iwl_priv *priv = hw->priv;
7864         int i, avail;
7865         struct iwl_tx_queue *txq;
7866         struct iwl_queue *q;
7867         unsigned long flags;
7868
7869         IWL_DEBUG_MAC80211("enter\n");
7870
7871         if (!iwl_is_ready_rf(priv)) {
7872                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7873                 return -EIO;
7874         }
7875
7876         spin_lock_irqsave(&priv->lock, flags);
7877
7878         for (i = 0; i < AC_NUM; i++) {
7879                 txq = &priv->txq[i];
7880                 q = &txq->q;
7881                 avail = iwl_queue_space(q);
7882
7883                 stats->data[i].len = q->n_window - avail;
7884                 stats->data[i].limit = q->n_window - q->high_mark;
7885                 stats->data[i].count = q->n_window;
7886
7887         }
7888         spin_unlock_irqrestore(&priv->lock, flags);
7889
7890         IWL_DEBUG_MAC80211("leave\n");
7891
7892         return 0;
7893 }
7894
7895 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7896                              struct ieee80211_low_level_stats *stats)
7897 {
7898         IWL_DEBUG_MAC80211("enter\n");
7899         IWL_DEBUG_MAC80211("leave\n");
7900
7901         return 0;
7902 }
7903
7904 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7905 {
7906         IWL_DEBUG_MAC80211("enter\n");
7907         IWL_DEBUG_MAC80211("leave\n");
7908
7909         return 0;
7910 }
7911
7912 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7913 {
7914         struct iwl_priv *priv = hw->priv;
7915         unsigned long flags;
7916
7917         mutex_lock(&priv->mutex);
7918         IWL_DEBUG_MAC80211("enter\n");
7919
7920         priv->lq_mngr.lq_ready = 0;
7921 #ifdef CONFIG_IWLWIFI_HT
7922         spin_lock_irqsave(&priv->lock, flags);
7923         memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
7924         spin_unlock_irqrestore(&priv->lock, flags);
7925 #ifdef CONFIG_IWLWIFI_HT_AGG
7926 /*      if (priv->lq_mngr.agg_ctrl.granted_ba)
7927                 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
7928
7929         memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl_agg_control));
7930         priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
7931         priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
7932         priv->lq_mngr.agg_ctrl.auto_agg = 1;
7933
7934         if (priv->lq_mngr.agg_ctrl.auto_agg)
7935                 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
7936 #endif /*CONFIG_IWLWIFI_HT_AGG */
7937 #endif /* CONFIG_IWLWIFI_HT */
7938
7939 #ifdef CONFIG_IWLWIFI_QOS
7940         iwl_reset_qos(priv);
7941 #endif
7942
7943         cancel_delayed_work(&priv->post_associate);
7944
7945         spin_lock_irqsave(&priv->lock, flags);
7946         priv->assoc_id = 0;
7947         priv->assoc_capability = 0;
7948         priv->call_post_assoc_from_beacon = 0;
7949         priv->assoc_station_added = 0;
7950
7951         /* new association get rid of ibss beacon skb */
7952         if (priv->ibss_beacon)
7953                 dev_kfree_skb(priv->ibss_beacon);
7954
7955         priv->ibss_beacon = NULL;
7956
7957         priv->beacon_int = priv->hw->conf.beacon_int;
7958         priv->timestamp1 = 0;
7959         priv->timestamp0 = 0;
7960         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7961                 priv->beacon_int = 0;
7962
7963         spin_unlock_irqrestore(&priv->lock, flags);
7964
7965         /* we are restarting association process
7966          * clear RXON_FILTER_ASSOC_MSK bit
7967          */
7968         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7969                 iwl_scan_cancel_timeout(priv, 100);
7970                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7971                 iwl_commit_rxon(priv);
7972         }
7973
7974         /* Per mac80211.h: This is only used in IBSS mode... */
7975         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7976
7977                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7978                 mutex_unlock(&priv->mutex);
7979                 return;
7980         }
7981
7982         if (!iwl_is_ready_rf(priv)) {
7983                 IWL_DEBUG_MAC80211("leave - not ready\n");
7984                 mutex_unlock(&priv->mutex);
7985                 return;
7986         }
7987
7988         priv->only_active_channel = 0;
7989
7990         iwl_set_rate(priv);
7991
7992         mutex_unlock(&priv->mutex);
7993
7994         IWL_DEBUG_MAC80211("leave\n");
7995
7996 }
7997
7998 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7999                                  struct ieee80211_tx_control *control)
8000 {
8001         struct iwl_priv *priv = hw->priv;
8002         unsigned long flags;
8003
8004         mutex_lock(&priv->mutex);
8005         IWL_DEBUG_MAC80211("enter\n");
8006
8007         if (!iwl_is_ready_rf(priv)) {
8008                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8009                 mutex_unlock(&priv->mutex);
8010                 return -EIO;
8011         }
8012
8013         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8014                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
8015                 mutex_unlock(&priv->mutex);
8016                 return -EIO;
8017         }
8018
8019         spin_lock_irqsave(&priv->lock, flags);
8020
8021         if (priv->ibss_beacon)
8022                 dev_kfree_skb(priv->ibss_beacon);
8023
8024         priv->ibss_beacon = skb;
8025
8026         priv->assoc_id = 0;
8027
8028         IWL_DEBUG_MAC80211("leave\n");
8029         spin_unlock_irqrestore(&priv->lock, flags);
8030
8031 #ifdef CONFIG_IWLWIFI_QOS
8032         iwl_reset_qos(priv);
8033 #endif
8034
8035         queue_work(priv->workqueue, &priv->post_associate.work);
8036
8037         mutex_unlock(&priv->mutex);
8038
8039         return 0;
8040 }
8041
8042 #ifdef CONFIG_IWLWIFI_HT
8043 union ht_cap_info {
8044         struct {
8045                 u16 advanced_coding_cap         :1;
8046                 u16 supported_chan_width_set    :1;
8047                 u16 mimo_power_save_mode        :2;
8048                 u16 green_field                 :1;
8049                 u16 short_GI20                  :1;
8050                 u16 short_GI40                  :1;
8051                 u16 tx_stbc                     :1;
8052                 u16 rx_stbc                     :1;
8053                 u16 beam_forming                :1;
8054                 u16 delayed_ba                  :1;
8055                 u16 maximal_amsdu_size          :1;
8056                 u16 cck_mode_at_40MHz           :1;
8057                 u16 psmp_support                :1;
8058                 u16 stbc_ctrl_frame_support     :1;
8059                 u16 sig_txop_protection_support :1;
8060         };
8061         u16 val;
8062 } __attribute__ ((packed));
8063
8064 union ht_param_info{
8065         struct {
8066                 u8 max_rx_ampdu_factor  :2;
8067                 u8 mpdu_density         :3;
8068                 u8 reserved             :3;
8069         };
8070         u8 val;
8071 } __attribute__ ((packed));
8072
8073 union ht_exra_param_info {
8074         struct {
8075                 u8 ext_chan_offset              :2;
8076                 u8 tx_chan_width                :1;
8077                 u8 rifs_mode                    :1;
8078                 u8 controlled_access_only       :1;
8079                 u8 service_interval_granularity :3;
8080         };
8081         u8 val;
8082 } __attribute__ ((packed));
8083
8084 union ht_operation_mode{
8085         struct {
8086                 u16 op_mode     :2;
8087                 u16 non_GF      :1;
8088                 u16 reserved    :13;
8089         };
8090         u16 val;
8091 } __attribute__ ((packed));
8092
8093
8094 static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
8095                             struct ieee80211_ht_additional_info *ht_extra,
8096                             struct sta_ht_info *ht_info_ap,
8097                             struct sta_ht_info *ht_info)
8098 {
8099         union ht_cap_info cap;
8100         union ht_operation_mode op_mode;
8101         union ht_param_info param_info;
8102         union ht_exra_param_info extra_param_info;
8103
8104         IWL_DEBUG_MAC80211("enter: \n");
8105
8106         if (!ht_info) {
8107                 IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
8108                 return -1;
8109         }
8110
8111         if (ht_cap) {
8112                 cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
8113                 param_info.val = ht_cap->mac_ht_params_info;
8114                 ht_info->is_ht = 1;
8115                 if (cap.short_GI20)
8116                         ht_info->sgf |= 0x1;
8117                 if (cap.short_GI40)
8118                         ht_info->sgf |= 0x2;
8119                 ht_info->is_green_field = cap.green_field;
8120                 ht_info->max_amsdu_size = cap.maximal_amsdu_size;
8121                 ht_info->supported_chan_width = cap.supported_chan_width_set;
8122                 ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
8123                 memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
8124
8125                 ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
8126                 ht_info->mpdu_density = param_info.mpdu_density;
8127
8128                 IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
8129                                     ht_cap->supported_mcs_set[0],
8130                                     ht_cap->supported_mcs_set[1]);
8131
8132                 if (ht_info_ap) {
8133                         ht_info->control_channel = ht_info_ap->control_channel;
8134                         ht_info->extension_chan_offset =
8135                                 ht_info_ap->extension_chan_offset;
8136                         ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
8137                         ht_info->operating_mode = ht_info_ap->operating_mode;
8138                 }
8139
8140                 if (ht_extra) {
8141                         extra_param_info.val = ht_extra->ht_param;
8142                         ht_info->control_channel = ht_extra->control_chan;
8143                         ht_info->extension_chan_offset =
8144                             extra_param_info.ext_chan_offset;
8145                         ht_info->tx_chan_width = extra_param_info.tx_chan_width;
8146                         op_mode.val = (u16)
8147                             le16_to_cpu(ht_extra->operation_mode);
8148                         ht_info->operating_mode = op_mode.op_mode;
8149                         IWL_DEBUG_MAC80211("control channel %d\n",
8150                                             ht_extra->control_chan);
8151                 }
8152         } else
8153                 ht_info->is_ht = 0;
8154
8155         IWL_DEBUG_MAC80211("leave\n");
8156         return 0;
8157 }
8158
8159 static int iwl_mac_conf_ht(struct ieee80211_hw *hw,
8160                            struct ieee80211_ht_capability *ht_cap,
8161                            struct ieee80211_ht_additional_info *ht_extra)
8162 {
8163         struct iwl_priv *priv = hw->priv;
8164         int rs;
8165
8166         IWL_DEBUG_MAC80211("enter: \n");
8167
8168         rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
8169         iwl4965_set_rxon_chain(priv);
8170
8171         if (priv && priv->assoc_id &&
8172             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8173                 unsigned long flags;
8174
8175                 spin_lock_irqsave(&priv->lock, flags);
8176                 if (priv->beacon_int)
8177                         queue_work(priv->workqueue, &priv->post_associate.work);
8178                 else
8179                         priv->call_post_assoc_from_beacon = 1;
8180                 spin_unlock_irqrestore(&priv->lock, flags);
8181         }
8182
8183         IWL_DEBUG_MAC80211("leave: control channel %d\n",
8184                         ht_extra->control_chan);
8185         return rs;
8186
8187 }
8188
8189 static void iwl_set_ht_capab(struct ieee80211_hw *hw,
8190                              struct ieee80211_ht_capability *ht_cap,
8191                              u8 use_wide_chan)
8192 {
8193         union ht_cap_info cap;
8194         union ht_param_info param_info;
8195
8196         memset(&cap, 0, sizeof(union ht_cap_info));
8197         memset(&param_info, 0, sizeof(union ht_param_info));
8198
8199         cap.maximal_amsdu_size = HT_IE_MAX_AMSDU_SIZE_4K;
8200         cap.green_field = 1;
8201         cap.short_GI20 = 1;
8202         cap.short_GI40 = 1;
8203         cap.supported_chan_width_set = use_wide_chan;
8204         cap.mimo_power_save_mode = 0x3;
8205
8206         param_info.max_rx_ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
8207         param_info.mpdu_density = CFG_HT_MPDU_DENSITY_DEF;
8208         ht_cap->capabilities_info = (__le16) cpu_to_le16(cap.val);
8209         ht_cap->mac_ht_params_info = (u8) param_info.val;
8210
8211         ht_cap->supported_mcs_set[0] = 0xff;
8212         ht_cap->supported_mcs_set[1] = 0xff;
8213         ht_cap->supported_mcs_set[4] =
8214             (cap.supported_chan_width_set) ? 0x1: 0x0;
8215 }
8216
8217 static void iwl_mac_get_ht_capab(struct ieee80211_hw *hw,
8218                                  struct ieee80211_ht_capability *ht_cap)
8219 {
8220         u8 use_wide_channel = 1;
8221         struct iwl_priv *priv = hw->priv;
8222
8223         IWL_DEBUG_MAC80211("enter: \n");
8224         if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
8225                 use_wide_channel = 0;
8226
8227         /* no fat tx allowed on 2.4GHZ */
8228         if (priv->phymode != MODE_IEEE80211A)
8229                 use_wide_channel = 0;
8230
8231         iwl_set_ht_capab(hw, ht_cap, use_wide_channel);
8232         IWL_DEBUG_MAC80211("leave: \n");
8233 }
8234 #endif /*CONFIG_IWLWIFI_HT*/
8235
8236 /*****************************************************************************
8237  *
8238  * sysfs attributes
8239  *
8240  *****************************************************************************/
8241
8242 #ifdef CONFIG_IWLWIFI_DEBUG
8243
8244 /*
8245  * The following adds a new attribute to the sysfs representation
8246  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8247  * used for controlling the debug level.
8248  *
8249  * See the level definitions in iwl for details.
8250  */
8251
8252 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8253 {
8254         return sprintf(buf, "0x%08X\n", iwl_debug_level);
8255 }
8256 static ssize_t store_debug_level(struct device_driver *d,
8257                                  const char *buf, size_t count)
8258 {
8259         char *p = (char *)buf;
8260         u32 val;
8261
8262         val = simple_strtoul(p, &p, 0);
8263         if (p == buf)
8264                 printk(KERN_INFO DRV_NAME
8265                        ": %s is not in hex or decimal form.\n", buf);
8266         else
8267                 iwl_debug_level = val;
8268
8269         return strnlen(buf, count);
8270 }
8271
8272 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8273                    show_debug_level, store_debug_level);
8274
8275 #endif /* CONFIG_IWLWIFI_DEBUG */
8276
8277 static ssize_t show_rf_kill(struct device *d,
8278                             struct device_attribute *attr, char *buf)
8279 {
8280         /*
8281          * 0 - RF kill not enabled
8282          * 1 - SW based RF kill active (sysfs)
8283          * 2 - HW based RF kill active
8284          * 3 - Both HW and SW based RF kill active
8285          */
8286         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8287         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8288                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8289
8290         return sprintf(buf, "%i\n", val);
8291 }
8292
8293 static ssize_t store_rf_kill(struct device *d,
8294                              struct device_attribute *attr,
8295                              const char *buf, size_t count)
8296 {
8297         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8298
8299         mutex_lock(&priv->mutex);
8300         iwl_radio_kill_sw(priv, buf[0] == '1');
8301         mutex_unlock(&priv->mutex);
8302
8303         return count;
8304 }
8305
8306 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8307
8308 static ssize_t show_temperature(struct device *d,
8309                                 struct device_attribute *attr, char *buf)
8310 {
8311         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8312
8313         if (!iwl_is_alive(priv))
8314                 return -EAGAIN;
8315
8316         return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
8317 }
8318
8319 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8320
8321 static ssize_t show_rs_window(struct device *d,
8322                               struct device_attribute *attr,
8323                               char *buf)
8324 {
8325         struct iwl_priv *priv = d->driver_data;
8326         return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8327 }
8328 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8329
8330 static ssize_t show_tx_power(struct device *d,
8331                              struct device_attribute *attr, char *buf)
8332 {
8333         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8334         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8335 }
8336
8337 static ssize_t store_tx_power(struct device *d,
8338                               struct device_attribute *attr,
8339                               const char *buf, size_t count)
8340 {
8341         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8342         char *p = (char *)buf;
8343         u32 val;
8344
8345         val = simple_strtoul(p, &p, 10);
8346         if (p == buf)
8347                 printk(KERN_INFO DRV_NAME
8348                        ": %s is not in decimal form.\n", buf);
8349         else
8350                 iwl_hw_reg_set_txpower(priv, val);
8351
8352         return count;
8353 }
8354
8355 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8356
8357 static ssize_t show_flags(struct device *d,
8358                           struct device_attribute *attr, char *buf)
8359 {
8360         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8361
8362         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8363 }
8364
8365 static ssize_t store_flags(struct device *d,
8366                            struct device_attribute *attr,
8367                            const char *buf, size_t count)
8368 {
8369         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8370         u32 flags = simple_strtoul(buf, NULL, 0);
8371
8372         mutex_lock(&priv->mutex);
8373         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8374                 /* Cancel any currently running scans... */
8375                 if (iwl_scan_cancel_timeout(priv, 100))
8376                         IWL_WARNING("Could not cancel scan.\n");
8377                 else {
8378                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8379                                        flags);
8380                         priv->staging_rxon.flags = cpu_to_le32(flags);
8381                         iwl_commit_rxon(priv);
8382                 }
8383         }
8384         mutex_unlock(&priv->mutex);
8385
8386         return count;
8387 }
8388
8389 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8390
8391 static ssize_t show_filter_flags(struct device *d,
8392                                  struct device_attribute *attr, char *buf)
8393 {
8394         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8395
8396         return sprintf(buf, "0x%04X\n",
8397                 le32_to_cpu(priv->active_rxon.filter_flags));
8398 }
8399
8400 static ssize_t store_filter_flags(struct device *d,
8401                                   struct device_attribute *attr,
8402                                   const char *buf, size_t count)
8403 {
8404         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8405         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8406
8407         mutex_lock(&priv->mutex);
8408         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8409                 /* Cancel any currently running scans... */
8410                 if (iwl_scan_cancel_timeout(priv, 100))
8411                         IWL_WARNING("Could not cancel scan.\n");
8412                 else {
8413                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8414                                        "0x%04X\n", filter_flags);
8415                         priv->staging_rxon.filter_flags =
8416                                 cpu_to_le32(filter_flags);
8417                         iwl_commit_rxon(priv);
8418                 }
8419         }
8420         mutex_unlock(&priv->mutex);
8421
8422         return count;
8423 }
8424
8425 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8426                    store_filter_flags);
8427
8428 static ssize_t show_tune(struct device *d,
8429                          struct device_attribute *attr, char *buf)
8430 {
8431         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8432
8433         return sprintf(buf, "0x%04X\n",
8434                        (priv->phymode << 8) |
8435                         le16_to_cpu(priv->active_rxon.channel));
8436 }
8437
8438 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
8439
8440 static ssize_t store_tune(struct device *d,
8441                           struct device_attribute *attr,
8442                           const char *buf, size_t count)
8443 {
8444         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8445         char *p = (char *)buf;
8446         u16 tune = simple_strtoul(p, &p, 0);
8447         u8 phymode = (tune >> 8) & 0xff;
8448         u16 channel = tune & 0xff;
8449
8450         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8451
8452         mutex_lock(&priv->mutex);
8453         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8454             (priv->phymode != phymode)) {
8455                 const struct iwl_channel_info *ch_info;
8456
8457                 ch_info = iwl_get_channel_info(priv, phymode, channel);
8458                 if (!ch_info) {
8459                         IWL_WARNING("Requested invalid phymode/channel "
8460                                     "combination: %d %d\n", phymode, channel);
8461                         mutex_unlock(&priv->mutex);
8462                         return -EINVAL;
8463                 }
8464
8465                 /* Cancel any currently running scans... */
8466                 if (iwl_scan_cancel_timeout(priv, 100))
8467                         IWL_WARNING("Could not cancel scan.\n");
8468                 else {
8469                         IWL_DEBUG_INFO("Committing phymode and "
8470                                        "rxon.channel = %d %d\n",
8471                                        phymode, channel);
8472
8473                         iwl_set_rxon_channel(priv, phymode, channel);
8474                         iwl_set_flags_for_phymode(priv, phymode);
8475
8476                         iwl_set_rate(priv);
8477                         iwl_commit_rxon(priv);
8478                 }
8479         }
8480         mutex_unlock(&priv->mutex);
8481
8482         return count;
8483 }
8484
8485 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8486
8487 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8488
8489 static ssize_t show_measurement(struct device *d,
8490                                 struct device_attribute *attr, char *buf)
8491 {
8492         struct iwl_priv *priv = dev_get_drvdata(d);
8493         struct iwl_spectrum_notification measure_report;
8494         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8495         u8 *data = (u8 *) & measure_report;
8496         unsigned long flags;
8497
8498         spin_lock_irqsave(&priv->lock, flags);
8499         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8500                 spin_unlock_irqrestore(&priv->lock, flags);
8501                 return 0;
8502         }
8503         memcpy(&measure_report, &priv->measure_report, size);
8504         priv->measurement_status = 0;
8505         spin_unlock_irqrestore(&priv->lock, flags);
8506
8507         while (size && (PAGE_SIZE - len)) {
8508                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8509                                    PAGE_SIZE - len, 1);
8510                 len = strlen(buf);
8511                 if (PAGE_SIZE - len)
8512                         buf[len++] = '\n';
8513
8514                 ofs += 16;
8515                 size -= min(size, 16U);
8516         }
8517
8518         return len;
8519 }
8520
8521 static ssize_t store_measurement(struct device *d,
8522                                  struct device_attribute *attr,
8523                                  const char *buf, size_t count)
8524 {
8525         struct iwl_priv *priv = dev_get_drvdata(d);
8526         struct ieee80211_measurement_params params = {
8527                 .channel = le16_to_cpu(priv->active_rxon.channel),
8528                 .start_time = cpu_to_le64(priv->last_tsf),
8529                 .duration = cpu_to_le16(1),
8530         };
8531         u8 type = IWL_MEASURE_BASIC;
8532         u8 buffer[32];
8533         u8 channel;
8534
8535         if (count) {
8536                 char *p = buffer;
8537                 strncpy(buffer, buf, min(sizeof(buffer), count));
8538                 channel = simple_strtoul(p, NULL, 0);
8539                 if (channel)
8540                         params.channel = channel;
8541
8542                 p = buffer;
8543                 while (*p && *p != ' ')
8544                         p++;
8545                 if (*p)
8546                         type = simple_strtoul(p + 1, NULL, 0);
8547         }
8548
8549         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8550                        "channel %d (for '%s')\n", type, params.channel, buf);
8551         iwl_get_measurement(priv, &params, type);
8552
8553         return count;
8554 }
8555
8556 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8557                    show_measurement, store_measurement);
8558 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
8559
8560 static ssize_t store_retry_rate(struct device *d,
8561                                 struct device_attribute *attr,
8562                                 const char *buf, size_t count)
8563 {
8564         struct iwl_priv *priv = dev_get_drvdata(d);
8565
8566         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8567         if (priv->retry_rate <= 0)
8568                 priv->retry_rate = 1;
8569
8570         return count;
8571 }
8572
8573 static ssize_t show_retry_rate(struct device *d,
8574                                struct device_attribute *attr, char *buf)
8575 {
8576         struct iwl_priv *priv = dev_get_drvdata(d);
8577         return sprintf(buf, "%d", priv->retry_rate);
8578 }
8579
8580 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8581                    store_retry_rate);
8582
8583 static ssize_t store_power_level(struct device *d,
8584                                  struct device_attribute *attr,
8585                                  const char *buf, size_t count)
8586 {
8587         struct iwl_priv *priv = dev_get_drvdata(d);
8588         int rc;
8589         int mode;
8590
8591         mode = simple_strtoul(buf, NULL, 0);
8592         mutex_lock(&priv->mutex);
8593
8594         if (!iwl_is_ready(priv)) {
8595                 rc = -EAGAIN;
8596                 goto out;
8597         }
8598
8599         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8600                 mode = IWL_POWER_AC;
8601         else
8602                 mode |= IWL_POWER_ENABLED;
8603
8604         if (mode != priv->power_mode) {
8605                 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8606                 if (rc) {
8607                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8608                         goto out;
8609                 }
8610                 priv->power_mode = mode;
8611         }
8612
8613         rc = count;
8614
8615  out:
8616         mutex_unlock(&priv->mutex);
8617         return rc;
8618 }
8619
8620 #define MAX_WX_STRING 80
8621
8622 /* Values are in microsecond */
8623 static const s32 timeout_duration[] = {
8624         350000,
8625         250000,
8626         75000,
8627         37000,
8628         25000,
8629 };
8630 static const s32 period_duration[] = {
8631         400000,
8632         700000,
8633         1000000,
8634         1000000,
8635         1000000
8636 };
8637
8638 static ssize_t show_power_level(struct device *d,
8639                                 struct device_attribute *attr, char *buf)
8640 {
8641         struct iwl_priv *priv = dev_get_drvdata(d);
8642         int level = IWL_POWER_LEVEL(priv->power_mode);
8643         char *p = buf;
8644
8645         p += sprintf(p, "%d ", level);
8646         switch (level) {
8647         case IWL_POWER_MODE_CAM:
8648         case IWL_POWER_AC:
8649                 p += sprintf(p, "(AC)");
8650                 break;
8651         case IWL_POWER_BATTERY:
8652                 p += sprintf(p, "(BATTERY)");
8653                 break;
8654         default:
8655                 p += sprintf(p,
8656                              "(Timeout %dms, Period %dms)",
8657                              timeout_duration[level - 1] / 1000,
8658                              period_duration[level - 1] / 1000);
8659         }
8660
8661         if (!(priv->power_mode & IWL_POWER_ENABLED))
8662                 p += sprintf(p, " OFF\n");
8663         else
8664                 p += sprintf(p, " \n");
8665
8666         return (p - buf + 1);
8667
8668 }
8669
8670 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8671                    store_power_level);
8672
8673 static ssize_t show_channels(struct device *d,
8674                              struct device_attribute *attr, char *buf)
8675 {
8676         struct iwl_priv *priv = dev_get_drvdata(d);
8677         int len = 0, i;
8678         struct ieee80211_channel *channels = NULL;
8679         const struct ieee80211_hw_mode *hw_mode = NULL;
8680         int count = 0;
8681
8682         if (!iwl_is_ready(priv))
8683                 return -EAGAIN;
8684
8685         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8686         if (!hw_mode)
8687                 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8688         if (hw_mode) {
8689                 channels = hw_mode->channels;
8690                 count = hw_mode->num_channels;
8691         }
8692
8693         len +=
8694             sprintf(&buf[len],
8695                     "Displaying %d channels in 2.4GHz band "
8696                     "(802.11bg):\n", count);
8697
8698         for (i = 0; i < count; i++)
8699                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8700                                channels[i].chan,
8701                                channels[i].power_level,
8702                                channels[i].
8703                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8704                                " (IEEE 802.11h required)" : "",
8705                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8706                                 || (channels[i].
8707                                     flag &
8708                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8709                                ", IBSS",
8710                                channels[i].
8711                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8712                                "active/passive" : "passive only");
8713
8714         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8715         if (hw_mode) {
8716                 channels = hw_mode->channels;
8717                 count = hw_mode->num_channels;
8718         } else {
8719                 channels = NULL;
8720                 count = 0;
8721         }
8722
8723         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8724                        "(802.11a):\n", count);
8725
8726         for (i = 0; i < count; i++)
8727                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8728                                channels[i].chan,
8729                                channels[i].power_level,
8730                                channels[i].
8731                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8732                                " (IEEE 802.11h required)" : "",
8733                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8734                                 || (channels[i].
8735                                     flag &
8736                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8737                                ", IBSS",
8738                                channels[i].
8739                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8740                                "active/passive" : "passive only");
8741
8742         return len;
8743 }
8744
8745 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8746
8747 static ssize_t show_statistics(struct device *d,
8748                                struct device_attribute *attr, char *buf)
8749 {
8750         struct iwl_priv *priv = dev_get_drvdata(d);
8751         u32 size = sizeof(struct iwl_notif_statistics);
8752         u32 len = 0, ofs = 0;
8753         u8 *data = (u8 *) & priv->statistics;
8754         int rc = 0;
8755
8756         if (!iwl_is_alive(priv))
8757                 return -EAGAIN;
8758
8759         mutex_lock(&priv->mutex);
8760         rc = iwl_send_statistics_request(priv);
8761         mutex_unlock(&priv->mutex);
8762
8763         if (rc) {
8764                 len = sprintf(buf,
8765                               "Error sending statistics request: 0x%08X\n", rc);
8766                 return len;
8767         }
8768
8769         while (size && (PAGE_SIZE - len)) {
8770                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8771                                    PAGE_SIZE - len, 1);
8772                 len = strlen(buf);
8773                 if (PAGE_SIZE - len)
8774                         buf[len++] = '\n';
8775
8776                 ofs += 16;
8777                 size -= min(size, 16U);
8778         }
8779
8780         return len;
8781 }
8782
8783 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8784
8785 static ssize_t show_antenna(struct device *d,
8786                             struct device_attribute *attr, char *buf)
8787 {
8788         struct iwl_priv *priv = dev_get_drvdata(d);
8789
8790         if (!iwl_is_alive(priv))
8791                 return -EAGAIN;
8792
8793         return sprintf(buf, "%d\n", priv->antenna);
8794 }
8795
8796 static ssize_t store_antenna(struct device *d,
8797                              struct device_attribute *attr,
8798                              const char *buf, size_t count)
8799 {
8800         int ant;
8801         struct iwl_priv *priv = dev_get_drvdata(d);
8802
8803         if (count == 0)
8804                 return 0;
8805
8806         if (sscanf(buf, "%1i", &ant) != 1) {
8807                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8808                 return count;
8809         }
8810
8811         if ((ant >= 0) && (ant <= 2)) {
8812                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8813                 priv->antenna = (enum iwl_antenna)ant;
8814         } else
8815                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8816
8817
8818         return count;
8819 }
8820
8821 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8822
8823 static ssize_t show_status(struct device *d,
8824                            struct device_attribute *attr, char *buf)
8825 {
8826         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8827         if (!iwl_is_alive(priv))
8828                 return -EAGAIN;
8829         return sprintf(buf, "0x%08x\n", (int)priv->status);
8830 }
8831
8832 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8833
8834 static ssize_t dump_error_log(struct device *d,
8835                               struct device_attribute *attr,
8836                               const char *buf, size_t count)
8837 {
8838         char *p = (char *)buf;
8839
8840         if (p[0] == '1')
8841                 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8842
8843         return strnlen(buf, count);
8844 }
8845
8846 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8847
8848 static ssize_t dump_event_log(struct device *d,
8849                               struct device_attribute *attr,
8850                               const char *buf, size_t count)
8851 {
8852         char *p = (char *)buf;
8853
8854         if (p[0] == '1')
8855                 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8856
8857         return strnlen(buf, count);
8858 }
8859
8860 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8861
8862 /*****************************************************************************
8863  *
8864  * driver setup and teardown
8865  *
8866  *****************************************************************************/
8867
8868 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8869 {
8870         priv->workqueue = create_workqueue(DRV_NAME);
8871
8872         init_waitqueue_head(&priv->wait_command_queue);
8873
8874         INIT_WORK(&priv->up, iwl_bg_up);
8875         INIT_WORK(&priv->restart, iwl_bg_restart);
8876         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8877         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8878         INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8879         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8880         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8881         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8882         INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8883         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8884         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8885         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8886
8887         iwl_hw_setup_deferred_work(priv);
8888
8889         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8890                      iwl_irq_tasklet, (unsigned long)priv);
8891 }
8892
8893 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8894 {
8895         iwl_hw_cancel_deferred_work(priv);
8896
8897         cancel_delayed_work_sync(&priv->init_alive_start);
8898         cancel_delayed_work(&priv->scan_check);
8899         cancel_delayed_work(&priv->alive_start);
8900         cancel_delayed_work(&priv->post_associate);
8901         cancel_work_sync(&priv->beacon_update);
8902 }
8903
8904 static struct attribute *iwl_sysfs_entries[] = {
8905         &dev_attr_antenna.attr,
8906         &dev_attr_channels.attr,
8907         &dev_attr_dump_errors.attr,
8908         &dev_attr_dump_events.attr,
8909         &dev_attr_flags.attr,
8910         &dev_attr_filter_flags.attr,
8911 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8912         &dev_attr_measurement.attr,
8913 #endif
8914         &dev_attr_power_level.attr,
8915         &dev_attr_retry_rate.attr,
8916         &dev_attr_rf_kill.attr,
8917         &dev_attr_rs_window.attr,
8918         &dev_attr_statistics.attr,
8919         &dev_attr_status.attr,
8920         &dev_attr_temperature.attr,
8921         &dev_attr_tune.attr,
8922         &dev_attr_tx_power.attr,
8923
8924         NULL
8925 };
8926
8927 static struct attribute_group iwl_attribute_group = {
8928         .name = NULL,           /* put in device directory */
8929         .attrs = iwl_sysfs_entries,
8930 };
8931
8932 static struct ieee80211_ops iwl_hw_ops = {
8933         .tx = iwl_mac_tx,
8934         .start = iwl_mac_start,
8935         .stop = iwl_mac_stop,
8936         .add_interface = iwl_mac_add_interface,
8937         .remove_interface = iwl_mac_remove_interface,
8938         .config = iwl_mac_config,
8939         .config_interface = iwl_mac_config_interface,
8940         .configure_filter = iwl_configure_filter,
8941         .set_key = iwl_mac_set_key,
8942         .get_stats = iwl_mac_get_stats,
8943         .get_tx_stats = iwl_mac_get_tx_stats,
8944         .conf_tx = iwl_mac_conf_tx,
8945         .get_tsf = iwl_mac_get_tsf,
8946         .reset_tsf = iwl_mac_reset_tsf,
8947         .beacon_update = iwl_mac_beacon_update,
8948         .erp_ie_changed = iwl_mac_erp_ie_changed,
8949 #ifdef CONFIG_IWLWIFI_HT
8950         .conf_ht = iwl_mac_conf_ht,
8951         .get_ht_capab = iwl_mac_get_ht_capab,
8952 #ifdef CONFIG_IWLWIFI_HT_AGG
8953         .ht_tx_agg_start = iwl_mac_ht_tx_agg_start,
8954         .ht_tx_agg_stop = iwl_mac_ht_tx_agg_stop,
8955         .ht_rx_agg_start = iwl_mac_ht_rx_agg_start,
8956         .ht_rx_agg_stop = iwl_mac_ht_rx_agg_stop,
8957 #endif  /* CONFIG_IWLWIFI_HT_AGG */
8958 #endif  /* CONFIG_IWLWIFI_HT */
8959         .hw_scan = iwl_mac_hw_scan
8960 };
8961
8962 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8963 {
8964         int err = 0;
8965         struct iwl_priv *priv;
8966         struct ieee80211_hw *hw;
8967         int i;
8968
8969         if (iwl_param_disable_hw_scan) {
8970                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8971                 iwl_hw_ops.hw_scan = NULL;
8972         }
8973
8974         if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8975             (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8976                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8977                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8978                 err = -EINVAL;
8979                 goto out;
8980         }
8981
8982         /* mac80211 allocates memory for this device instance, including
8983          *   space for this driver's private structure */
8984         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8985         if (hw == NULL) {
8986                 IWL_ERROR("Can not allocate network device\n");
8987                 err = -ENOMEM;
8988                 goto out;
8989         }
8990         SET_IEEE80211_DEV(hw, &pdev->dev);
8991
8992         hw->rate_control_algorithm = "iwl-4965-rs";
8993
8994         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8995         priv = hw->priv;
8996         priv->hw = hw;
8997
8998         priv->pci_dev = pdev;
8999         priv->antenna = (enum iwl_antenna)iwl_param_antenna;
9000 #ifdef CONFIG_IWLWIFI_DEBUG
9001         iwl_debug_level = iwl_param_debug;
9002         atomic_set(&priv->restrict_refcnt, 0);
9003 #endif
9004         priv->retry_rate = 1;
9005
9006         priv->ibss_beacon = NULL;
9007
9008         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
9009          *   the range of signal quality values that we'll provide.
9010          * Negative values for level/noise indicate that we'll provide dBm.
9011          * For WE, at least, non-0 values here *enable* display of values
9012          *   in app (iwconfig). */
9013         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
9014         hw->max_noise = -20;    /* noise level, negative indicates dBm */
9015         hw->max_signal = 100;   /* link quality indication (%) */
9016
9017         /* Tell mac80211 our Tx characteristics */
9018         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
9019
9020         hw->queues = 4;
9021 #ifdef CONFIG_IWLWIFI_HT
9022 #ifdef CONFIG_IWLWIFI_HT_AGG
9023         hw->queues = 16;
9024 #endif /* CONFIG_IWLWIFI_HT_AGG */
9025 #endif /* CONFIG_IWLWIFI_HT */
9026
9027         spin_lock_init(&priv->lock);
9028         spin_lock_init(&priv->power_data.lock);
9029         spin_lock_init(&priv->sta_lock);
9030         spin_lock_init(&priv->hcmd_lock);
9031         spin_lock_init(&priv->lq_mngr.lock);
9032
9033         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
9034                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
9035
9036         INIT_LIST_HEAD(&priv->free_frames);
9037
9038         mutex_init(&priv->mutex);
9039         if (pci_enable_device(pdev)) {
9040                 err = -ENODEV;
9041                 goto out_ieee80211_free_hw;
9042         }
9043
9044         pci_set_master(pdev);
9045
9046         iwl_clear_stations_table(priv);
9047
9048         priv->data_retry_limit = -1;
9049         priv->ieee_channels = NULL;
9050         priv->ieee_rates = NULL;
9051         priv->phymode = -1;
9052
9053         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
9054         if (!err)
9055                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
9056         if (err) {
9057                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
9058                 goto out_pci_disable_device;
9059         }
9060
9061         pci_set_drvdata(pdev, priv);
9062         err = pci_request_regions(pdev, DRV_NAME);
9063         if (err)
9064                 goto out_pci_disable_device;
9065         /* We disable the RETRY_TIMEOUT register (0x41) to keep
9066          * PCI Tx retries from interfering with C3 CPU state */
9067         pci_write_config_byte(pdev, 0x41, 0x00);
9068         priv->hw_base = pci_iomap(pdev, 0, 0);
9069         if (!priv->hw_base) {
9070                 err = -ENODEV;
9071                 goto out_pci_release_regions;
9072         }
9073
9074         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9075                         (unsigned long long) pci_resource_len(pdev, 0));
9076         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9077
9078         /* Initialize module parameter values here */
9079
9080         if (iwl_param_disable) {
9081                 set_bit(STATUS_RF_KILL_SW, &priv->status);
9082                 IWL_DEBUG_INFO("Radio disabled.\n");
9083         }
9084
9085         priv->iw_mode = IEEE80211_IF_TYPE_STA;
9086
9087         priv->ps_mode = 0;
9088         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9089         priv->is_ht_enabled = 1;
9090         priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
9091         priv->valid_antenna = 0x7;      /* assume all 3 connected */
9092         priv->ps_mode = IWL_MIMO_PS_NONE;
9093
9094         iwl4965_set_rxon_chain(priv);
9095
9096         printk(KERN_INFO DRV_NAME
9097                ": Detected Intel Wireless WiFi Link 4965AGN\n");
9098
9099         /* Device-specific setup */
9100         if (iwl_hw_set_hw_setting(priv)) {
9101                 IWL_ERROR("failed to set hw settings\n");
9102                 mutex_unlock(&priv->mutex);
9103                 goto out_iounmap;
9104         }
9105
9106 #ifdef CONFIG_IWLWIFI_QOS
9107         if (iwl_param_qos_enable)
9108                 priv->qos_data.qos_enable = 1;
9109
9110         iwl_reset_qos(priv);
9111
9112         priv->qos_data.qos_active = 0;
9113         priv->qos_data.qos_cap.val = 0;
9114 #endif /* CONFIG_IWLWIFI_QOS */
9115
9116         iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9117         iwl_setup_deferred_work(priv);
9118         iwl_setup_rx_handlers(priv);
9119
9120         priv->rates_mask = IWL_RATES_MASK;
9121         /* If power management is turned on, default to AC mode */
9122         priv->power_mode = IWL_POWER_AC;
9123         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9124
9125         pci_enable_msi(pdev);
9126
9127         err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
9128         if (err) {
9129                 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
9130                 goto out_disable_msi;
9131         }
9132
9133         mutex_lock(&priv->mutex);
9134
9135         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
9136         if (err) {
9137                 IWL_ERROR("failed to create sysfs device attributes\n");
9138                 mutex_unlock(&priv->mutex);
9139                 goto out_release_irq;
9140         }
9141
9142         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
9143          * ucode filename and max sizes are card-specific. */
9144         err = iwl_read_ucode(priv);
9145         if (err) {
9146                 IWL_ERROR("Could not read microcode: %d\n", err);
9147                 mutex_unlock(&priv->mutex);
9148                 goto out_pci_alloc;
9149         }
9150
9151         mutex_unlock(&priv->mutex);
9152
9153         IWL_DEBUG_INFO("Queueing UP work.\n");
9154
9155         queue_work(priv->workqueue, &priv->up);
9156
9157         return 0;
9158
9159  out_pci_alloc:
9160         iwl_dealloc_ucode_pci(priv);
9161
9162         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9163
9164  out_release_irq:
9165         free_irq(pdev->irq, priv);
9166
9167  out_disable_msi:
9168         pci_disable_msi(pdev);
9169         destroy_workqueue(priv->workqueue);
9170         priv->workqueue = NULL;
9171         iwl_unset_hw_setting(priv);
9172
9173  out_iounmap:
9174         pci_iounmap(pdev, priv->hw_base);
9175  out_pci_release_regions:
9176         pci_release_regions(pdev);
9177  out_pci_disable_device:
9178         pci_disable_device(pdev);
9179         pci_set_drvdata(pdev, NULL);
9180  out_ieee80211_free_hw:
9181         ieee80211_free_hw(priv->hw);
9182  out:
9183         return err;
9184 }
9185
9186 static void iwl_pci_remove(struct pci_dev *pdev)
9187 {
9188         struct iwl_priv *priv = pci_get_drvdata(pdev);
9189         struct list_head *p, *q;
9190         int i;
9191
9192         if (!priv)
9193                 return;
9194
9195         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9196
9197         set_bit(STATUS_EXIT_PENDING, &priv->status);
9198
9199         iwl_down(priv);
9200
9201         /* Free MAC hash list for ADHOC */
9202         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9203                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9204                         list_del(p);
9205                         kfree(list_entry(p, struct iwl_ibss_seq, list));
9206                 }
9207         }
9208
9209         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9210
9211         iwl_dealloc_ucode_pci(priv);
9212
9213         if (priv->rxq.bd)
9214                 iwl_rx_queue_free(priv, &priv->rxq);
9215         iwl_hw_txq_ctx_free(priv);
9216
9217         iwl_unset_hw_setting(priv);
9218         iwl_clear_stations_table(priv);
9219
9220         if (priv->mac80211_registered) {
9221                 ieee80211_unregister_hw(priv->hw);
9222                 iwl_rate_control_unregister(priv->hw);
9223         }
9224
9225         /*netif_stop_queue(dev); */
9226         flush_workqueue(priv->workqueue);
9227
9228         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
9229          * priv->workqueue... so we can't take down the workqueue
9230          * until now... */
9231         destroy_workqueue(priv->workqueue);
9232         priv->workqueue = NULL;
9233
9234         free_irq(pdev->irq, priv);
9235         pci_disable_msi(pdev);
9236         pci_iounmap(pdev, priv->hw_base);
9237         pci_release_regions(pdev);
9238         pci_disable_device(pdev);
9239         pci_set_drvdata(pdev, NULL);
9240
9241         kfree(priv->channel_info);
9242
9243         kfree(priv->ieee_channels);
9244         kfree(priv->ieee_rates);
9245
9246         if (priv->ibss_beacon)
9247                 dev_kfree_skb(priv->ibss_beacon);
9248
9249         ieee80211_free_hw(priv->hw);
9250 }
9251
9252 #ifdef CONFIG_PM
9253
9254 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9255 {
9256         struct iwl_priv *priv = pci_get_drvdata(pdev);
9257
9258         set_bit(STATUS_IN_SUSPEND, &priv->status);
9259
9260         /* Take down the device; powers it off, etc. */
9261         iwl_down(priv);
9262
9263         if (priv->mac80211_registered)
9264                 ieee80211_stop_queues(priv->hw);
9265
9266         pci_save_state(pdev);
9267         pci_disable_device(pdev);
9268         pci_set_power_state(pdev, PCI_D3hot);
9269
9270         return 0;
9271 }
9272
9273 static void iwl_resume(struct iwl_priv *priv)
9274 {
9275         unsigned long flags;
9276
9277         /* The following it a temporary work around due to the
9278          * suspend / resume not fully initializing the NIC correctly.
9279          * Without all of the following, resume will not attempt to take
9280          * down the NIC (it shouldn't really need to) and will just try
9281          * and bring the NIC back up.  However that fails during the
9282          * ucode verification process.  This then causes iwl_down to be
9283          * called *after* iwl_hw_nic_init() has succeeded -- which
9284          * then lets the next init sequence succeed.  So, we've
9285          * replicated all of that NIC init code here... */
9286
9287         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9288
9289         iwl_hw_nic_init(priv);
9290
9291         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9292         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
9293                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
9294         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9295         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9296         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9297
9298         /* tell the device to stop sending interrupts */
9299         iwl_disable_interrupts(priv);
9300
9301         spin_lock_irqsave(&priv->lock, flags);
9302         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
9303
9304         if (!iwl_grab_nic_access(priv)) {
9305                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
9306                                 APMG_CLK_VAL_DMA_CLK_RQT);
9307                 iwl_release_nic_access(priv);
9308         }
9309         spin_unlock_irqrestore(&priv->lock, flags);
9310
9311         udelay(5);
9312
9313         iwl_hw_nic_reset(priv);
9314
9315         /* Bring the device back up */
9316         clear_bit(STATUS_IN_SUSPEND, &priv->status);
9317         queue_work(priv->workqueue, &priv->up);
9318 }
9319
9320 static int iwl_pci_resume(struct pci_dev *pdev)
9321 {
9322         struct iwl_priv *priv = pci_get_drvdata(pdev);
9323         int err;
9324
9325         printk(KERN_INFO "Coming out of suspend...\n");
9326
9327         pci_set_power_state(pdev, PCI_D0);
9328         err = pci_enable_device(pdev);
9329         pci_restore_state(pdev);
9330
9331         /*
9332          * Suspend/Resume resets the PCI configuration space, so we have to
9333          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
9334          * from interfering with C3 CPU state. pci_restore_state won't help
9335          * here since it only restores the first 64 bytes pci config header.
9336          */
9337         pci_write_config_byte(pdev, 0x41, 0x00);
9338
9339         iwl_resume(priv);
9340
9341         return 0;
9342 }
9343
9344 #endif /* CONFIG_PM */
9345
9346 /*****************************************************************************
9347  *
9348  * driver and module entry point
9349  *
9350  *****************************************************************************/
9351
9352 static struct pci_driver iwl_driver = {
9353         .name = DRV_NAME,
9354         .id_table = iwl_hw_card_ids,
9355         .probe = iwl_pci_probe,
9356         .remove = __devexit_p(iwl_pci_remove),
9357 #ifdef CONFIG_PM
9358         .suspend = iwl_pci_suspend,
9359         .resume = iwl_pci_resume,
9360 #endif
9361 };
9362
9363 static int __init iwl_init(void)
9364 {
9365
9366         int ret;
9367         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9368         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9369         ret = pci_register_driver(&iwl_driver);
9370         if (ret) {
9371                 IWL_ERROR("Unable to initialize PCI module\n");
9372                 return ret;
9373         }
9374 #ifdef CONFIG_IWLWIFI_DEBUG
9375         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
9376         if (ret) {
9377                 IWL_ERROR("Unable to create driver sysfs file\n");
9378                 pci_unregister_driver(&iwl_driver);
9379                 return ret;
9380         }
9381 #endif
9382
9383         return ret;
9384 }
9385
9386 static void __exit iwl_exit(void)
9387 {
9388 #ifdef CONFIG_IWLWIFI_DEBUG
9389         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
9390 #endif
9391         pci_unregister_driver(&iwl_driver);
9392 }
9393
9394 module_param_named(antenna, iwl_param_antenna, int, 0444);
9395 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9396 module_param_named(disable, iwl_param_disable, int, 0444);
9397 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9398 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
9399 MODULE_PARM_DESC(hwcrypto,
9400                  "using hardware crypto engine (default 0 [software])\n");
9401 module_param_named(debug, iwl_param_debug, int, 0444);
9402 MODULE_PARM_DESC(debug, "debug output mask");
9403 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
9404 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9405
9406 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
9407 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9408
9409 /* QoS */
9410 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
9411 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9412
9413 module_exit(iwl_exit);
9414 module_init(iwl_init);