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/skbuff.h>
  52 #include <linux/netdevice.h>
  53 #include <linux/etherdevice.h>
  54 #include <linux/if_arp.h>
  55
  56 #include <net/ieee80211_radiotap.h>
  57 #include <net/mac80211.h>
  58
  59 #include <asm/div64.h>
  60
  61 #define IWL 4965
  62
  63 #include "iwlwifi.h"
  64 #include "iwl-4965.h"
  65 #include "iwl-helpers.h"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 u32 iwl_debug_level;
  69 #endif
  70
  71 /******************************************************************************
  72  *
  73  * module boiler plate
  74  *
  75  ******************************************************************************/
  76
  77 /* module parameters */
  78 int iwl_param_disable_hw_scan;
  79 int iwl_param_debug;
  80 int iwl_param_disable;      /* def: enable radio */
  81 int iwl_param_antenna;      /* def: 0 = both antennas (use diversity) */
  82 int iwl_param_hwcrypto;     /* def: using software encryption */
  83 int iwl_param_qos_enable = 1;
  84 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
  85
  86 /*
  87  * module name, copyright, version, etc.
  88  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  89  */
  90
  91 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  92
  93 #ifdef CONFIG_IWLWIFI_DEBUG
  94 #define VD "d"
  95 #else
  96 #define VD
  97 #endif
  98
  99 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
 100 #define VS "s"
 101 #else
 102 #define VS
 103 #endif
 104
 105 #define IWLWIFI_VERSION "0.1.15k" VD VS
 106 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
 107 #define DRV_VERSION     IWLWIFI_VERSION
 108
 109 /* Change firmware file name, using "-" and incrementing number,
 110  *   *only* when uCode interface or architecture changes so that it
 111  *   is not compatible with earlier drivers.
 112  * This number will also appear in << 8 position of 1st dword of uCode file */
 113 #define IWL4965_UCODE_API "-1"
 114
 115 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 116 MODULE_VERSION(DRV_VERSION);
 117 MODULE_AUTHOR(DRV_COPYRIGHT);
 118 MODULE_LICENSE("GPL");
 119
 120 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 121 {
 122         u16 fc = le16_to_cpu(hdr->frame_control);
 123         int hdr_len = ieee80211_get_hdrlen(fc);
 124
 125         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 126                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 127         return NULL;
 128 }
 129
 130 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
 131                 struct iwl_priv *priv, int mode)
 132 {
 133         int i;
 134
 135         for (i = 0; i < 3; i++)
 136                 if (priv->modes[i].mode == mode)
 137                         return &priv->modes[i];
 138
 139         return NULL;
 140 }
 141
 142 static int iwl_is_empty_essid(const char *essid, int essid_len)
 143 {
 144         /* Single white space is for Linksys APs */
 145         if (essid_len == 1 && essid[0] == ' ')
 146                 return 1;
 147
 148         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 149         while (essid_len) {
 150                 essid_len--;
 151                 if (essid[essid_len] != '\0')
 152                         return 0;
 153         }
 154
 155         return 1;
 156 }
 157
 158 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
 159 {
 160         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 161         const char *s = essid;
 162         char *d = escaped;
 163
 164         if (iwl_is_empty_essid(essid, essid_len)) {
 165                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 166                 return escaped;
 167         }
 168
 169         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 170         while (essid_len--) {
 171                 if (*s == '\0') {
 172                         *d++ = '\\';
 173                         *d++ = '0';
 174                         s++;
 175                 } else
 176                         *d++ = *s++;
 177         }
 178         *d = '\0';
 179         return escaped;
 180 }
 181
 182 static void iwl_print_hex_dump(int level, void *p, u32 len)
 183 {
 184 #ifdef CONFIG_IWLWIFI_DEBUG
 185         if (!(iwl_debug_level & level))
 186                 return;
 187
 188         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 189                         p, len, 1);
 190 #endif
 191 }
 192
 193 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 194  * DMA services
 195  *
 196  * Theory of operation
 197  *
 198  * A queue is a circular buffers with 'Read' and 'Write' pointers.
 199  * 2 empty entries always kept in the buffer to protect from overflow.
 200  *
 201  * For Tx queue, there are low mark and high mark limits. If, after queuing
 202  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 203  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 204  * Tx queue resumed.
 205  *
 206  * The IWL operates with six queues, one receive queue in the device's
 207  * sram, one transmit queue for sending commands to the device firmware,
 208  * and four transmit queues for data.
 209  ***************************************************/
 210
 211 static int iwl_queue_space(const struct iwl_queue *q)
 212 {
 213         int s = q->last_used - q->first_empty;
 214
 215         if (q->last_used > q->first_empty)
 216                 s -= q->n_bd;
 217
 218         if (s <= 0)
 219                 s += q->n_window;
 220         /* keep some reserve to not confuse empty and full situations */
 221         s -= 2;
 222         if (s < 0)
 223                 s = 0;
 224         return s;
 225 }
 226
 227 /* XXX: n_bd must be power-of-two size */
 228 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 229 {
 230         return ++index & (n_bd - 1);
 231 }
 232
 233 /* XXX: n_bd must be power-of-two size */
 234 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 235 {
 236         return --index & (n_bd - 1);
 237 }
 238
 239 static inline int x2_queue_used(const struct iwl_queue *q, int i)
 240 {
 241         return q->first_empty > q->last_used ?
 242                 (i >= q->last_used && i < q->first_empty) :
 243                 !(i < q->last_used && i >= q->first_empty);
 244 }
 245
 246 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
 247 {
 248         if (is_huge)
 249                 return q->n_window;
 250
 251         return index & (q->n_window - 1);
 252 }
 253
 254 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
 255                           int count, int slots_num, u32 id)
 256 {
 257         q->n_bd = count;
 258         q->n_window = slots_num;
 259         q->id = id;
 260
 261         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 262          * and iwl_queue_dec_wrap are broken. */
 263         BUG_ON(!is_power_of_2(count));
 264
 265         /* slots_num must be power-of-two size, otherwise
 266          * get_cmd_index is broken. */
 267         BUG_ON(!is_power_of_2(slots_num));
 268
 269         q->low_mark = q->n_window / 4;
 270         if (q->low_mark < 4)
 271                 q->low_mark = 4;
 272
 273         q->high_mark = q->n_window / 8;
 274         if (q->high_mark < 2)
 275                 q->high_mark = 2;
 276
 277         q->first_empty = q->last_used = 0;
 278
 279         return 0;
 280 }
 281
 282 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
 283                               struct iwl_tx_queue *txq, u32 id)
 284 {
 285         struct pci_dev *dev = priv->pci_dev;
 286
 287         if (id != IWL_CMD_QUEUE_NUM) {
 288                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 289                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 290                 if (!txq->txb) {
 291                         IWL_ERROR("kmalloc for auxilary BD "
 292                                   "structures failed\n");
 293                         goto error;
 294                 }
 295         } else
 296                 txq->txb = NULL;
 297
 298         txq->bd = pci_alloc_consistent(dev,
 299                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 300                         &txq->q.dma_addr);
 301
 302         if (!txq->bd) {
 303                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 304                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 305                 goto error;
 306         }
 307         txq->q.id = id;
 308
 309         return 0;
 310
 311  error:
 312         if (txq->txb) {
 313                 kfree(txq->txb);
 314                 txq->txb = NULL;
 315         }
 316
 317         return -ENOMEM;
 318 }
 319
 320 int iwl_tx_queue_init(struct iwl_priv *priv,
 321                       struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
 322 {
 323         struct pci_dev *dev = priv->pci_dev;
 324         int len;
 325         int rc = 0;
 326
 327         /* alocate command space + one big command for scan since scan
 328          * command is very huge the system will not have two scan at the
 329          * same time */
 330         len = sizeof(struct iwl_cmd) * slots_num;
 331         if (txq_id == IWL_CMD_QUEUE_NUM)
 332                 len +=  IWL_MAX_SCAN_SIZE;
 333         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 334         if (!txq->cmd)
 335                 return -ENOMEM;
 336
 337         rc = iwl_tx_queue_alloc(priv, txq, txq_id);
 338         if (rc) {
 339                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 340
 341                 return -ENOMEM;
 342         }
 343         txq->need_update = 0;
 344
 345         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 346          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 347         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 348         iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 349
 350         iwl_hw_tx_queue_init(priv, txq);
 351
 352         return 0;
 353 }
 354
 355 /**
 356  * iwl_tx_queue_free - Deallocate DMA queue.
 357  * @txq: Transmit queue to deallocate.
 358  *
 359  * Empty queue by removing and destroying all BD's.
 360  * Free all buffers.  txq itself is not freed.
 361  *
 362  */
 363 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 364 {
 365         struct iwl_queue *q = &txq->q;
 366         struct pci_dev *dev = priv->pci_dev;
 367         int len;
 368
 369         if (q->n_bd == 0)
 370                 return;
 371
 372         /* first, empty all BD's */
 373         for (; q->first_empty != q->last_used;
 374              q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
 375                 iwl_hw_txq_free_tfd(priv, txq);
 376
 377         len = sizeof(struct iwl_cmd) * q->n_window;
 378         if (q->id == IWL_CMD_QUEUE_NUM)
 379                 len += IWL_MAX_SCAN_SIZE;
 380
 381         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 382
 383         /* free buffers belonging to queue itself */
 384         if (txq->q.n_bd)
 385                 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
 386                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 387
 388         if (txq->txb) {
 389                 kfree(txq->txb);
 390                 txq->txb = NULL;
 391         }
 392
 393         /* 0 fill whole structure */
 394         memset(txq, 0, sizeof(*txq));
 395 }
 396
 397 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 398
 399 /*************** STATION TABLE MANAGEMENT ****
 400  *
 401  * NOTE:  This needs to be overhauled to better synchronize between
 402  * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
 403  *
 404  * mac80211 should also be examined to determine if sta_info is duplicating
 405  * the functionality provided here
 406  */
 407
 408 /**************************************************************/
 409
 410 #if 0 /* temparary disable till we add real remove station */
 411 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 412 {
 413         int index = IWL_INVALID_STATION;
 414         int i;
 415         unsigned long flags;
 416
 417         spin_lock_irqsave(&priv->sta_lock, flags);
 418
 419         if (is_ap)
 420                 index = IWL_AP_ID;
 421         else if (is_broadcast_ether_addr(addr))
 422                 index = priv->hw_setting.bcast_sta_id;
 423         else
 424                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 425                         if (priv->stations[i].used &&
 426                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 427                                                 addr)) {
 428                                 index = i;
 429                                 break;
 430                         }
 431
 432         if (unlikely(index == IWL_INVALID_STATION))
 433                 goto out;
 434
 435         if (priv->stations[index].used) {
 436                 priv->stations[index].used = 0;
 437                 priv->num_stations--;
 438         }
 439
 440         BUG_ON(priv->num_stations < 0);
 441
 442 out:
 443         spin_unlock_irqrestore(&priv->sta_lock, flags);
 444         return 0;
 445 }
 446 #endif
 447
 448 static void iwl_clear_stations_table(struct iwl_priv *priv)
 449 {
 450         unsigned long flags;
 451
 452         spin_lock_irqsave(&priv->sta_lock, flags);
 453
 454         priv->num_stations = 0;
 455         memset(priv->stations, 0, sizeof(priv->stations));
 456
 457         spin_unlock_irqrestore(&priv->sta_lock, flags);
 458 }
 459
 460 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
 461 {
 462         int i;
 463         int index = IWL_INVALID_STATION;
 464         struct iwl_station_entry *station;
 465         unsigned long flags_spin;
 466         DECLARE_MAC_BUF(mac);
 467
 468         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 469         if (is_ap)
 470                 index = IWL_AP_ID;
 471         else if (is_broadcast_ether_addr(addr))
 472                 index = priv->hw_setting.bcast_sta_id;
 473         else
 474                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 475                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 476                                                 addr)) {
 477                                 index = i;
 478                                 break;
 479                         }
 480
 481                         if (!priv->stations[i].used &&
 482                             index == IWL_INVALID_STATION)
 483                                 index = i;
 484                 }
 485
 486
 487         /* These twh conditions has the same outcome but keep them separate
 488           since they have different meaning */
 489         if (unlikely(index == IWL_INVALID_STATION)) {
 490                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 491                 return index;
 492         }
 493
 494         if (priv->stations[index].used &&
 495             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 496                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 497                 return index;
 498         }
 499
 500
 501         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 502         station = &priv->stations[index];
 503         station->used = 1;
 504         priv->num_stations++;
 505
 506         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 507         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 508         station->sta.mode = 0;
 509         station->sta.sta.sta_id = index;
 510         station->sta.station_flags = 0;
 511
 512 #ifdef CONFIG_IWLWIFI_HT
 513         /* BCAST station and IBSS stations do not work in HT mode */
 514         if (index != priv->hw_setting.bcast_sta_id &&
 515             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 516                 iwl4965_set_ht_add_station(priv, index);
 517 #endif /*CONFIG_IWLWIFI_HT*/
 518
 519         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 520         iwl_send_add_station(priv, &station->sta, flags);
 521         return index;
 522
 523 }
 524
 525 /*************** DRIVER STATUS FUNCTIONS   *****/
 526
 527 static inline int iwl_is_ready(struct iwl_priv *priv)
 528 {
 529         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 530          * set but EXIT_PENDING is not */
 531         return test_bit(STATUS_READY, &priv->status) &&
 532                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 533                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 534 }
 535
 536 static inline int iwl_is_alive(struct iwl_priv *priv)
 537 {
 538         return test_bit(STATUS_ALIVE, &priv->status);
 539 }
 540
 541 static inline int iwl_is_init(struct iwl_priv *priv)
 542 {
 543         return test_bit(STATUS_INIT, &priv->status);
 544 }
 545
 546 static inline int iwl_is_rfkill(struct iwl_priv *priv)
 547 {
 548         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 549                test_bit(STATUS_RF_KILL_SW, &priv->status);
 550 }
 551
 552 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
 553 {
 554
 555         if (iwl_is_rfkill(priv))
 556                 return 0;
 557
 558         return iwl_is_ready(priv);
 559 }
 560
 561 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 562
 563 #define IWL_CMD(x) case x : return #x
 564
 565 static const char *get_cmd_string(u8 cmd)
 566 {
 567         switch (cmd) {
 568                 IWL_CMD(REPLY_ALIVE);
 569                 IWL_CMD(REPLY_ERROR);
 570                 IWL_CMD(REPLY_RXON);
 571                 IWL_CMD(REPLY_RXON_ASSOC);
 572                 IWL_CMD(REPLY_QOS_PARAM);
 573                 IWL_CMD(REPLY_RXON_TIMING);
 574                 IWL_CMD(REPLY_ADD_STA);
 575                 IWL_CMD(REPLY_REMOVE_STA);
 576                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 577                 IWL_CMD(REPLY_TX);
 578                 IWL_CMD(REPLY_RATE_SCALE);
 579                 IWL_CMD(REPLY_LEDS_CMD);
 580                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 581                 IWL_CMD(RADAR_NOTIFICATION);
 582                 IWL_CMD(REPLY_QUIET_CMD);
 583                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 584                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 585                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 586                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 587                 IWL_CMD(POWER_TABLE_CMD);
 588                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 589                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 590                 IWL_CMD(REPLY_SCAN_CMD);
 591                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 592                 IWL_CMD(SCAN_START_NOTIFICATION);
 593                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 594                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 595                 IWL_CMD(BEACON_NOTIFICATION);
 596                 IWL_CMD(REPLY_TX_BEACON);
 597                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 598                 IWL_CMD(QUIET_NOTIFICATION);
 599                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 600                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 601                 IWL_CMD(REPLY_BT_CONFIG);
 602                 IWL_CMD(REPLY_STATISTICS_CMD);
 603                 IWL_CMD(STATISTICS_NOTIFICATION);
 604                 IWL_CMD(REPLY_CARD_STATE_CMD);
 605                 IWL_CMD(CARD_STATE_NOTIFICATION);
 606                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 607                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 608                 IWL_CMD(SENSITIVITY_CMD);
 609                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 610                 IWL_CMD(REPLY_RX_PHY_CMD);
 611                 IWL_CMD(REPLY_RX_MPDU_CMD);
 612                 IWL_CMD(REPLY_4965_RX);
 613                 IWL_CMD(REPLY_COMPRESSED_BA);
 614         default:
 615                 return "UNKNOWN";
 616
 617         }
 618 }
 619
 620 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 621
 622 /**
 623  * iwl_enqueue_hcmd - enqueue a uCode command
 624  * @priv: device private data point
 625  * @cmd: a point to the ucode command structure
 626  *
 627  * The function returns < 0 values to indicate the operation is
 628  * failed. On success, it turns the index (> 0) of command in the
 629  * command queue.
 630  */
 631 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 632 {
 633         struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 634         struct iwl_queue *q = &txq->q;
 635         struct iwl_tfd_frame *tfd;
 636         u32 *control_flags;
 637         struct iwl_cmd *out_cmd;
 638         u32 idx;
 639         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 640         dma_addr_t phys_addr;
 641         int ret;
 642         unsigned long flags;
 643
 644         /* If any of the command structures end up being larger than
 645          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 646          * we will need to increase the size of the TFD entries */
 647         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 648                !(cmd->meta.flags & CMD_SIZE_HUGE));
 649
 650         if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 651                 IWL_ERROR("No space for Tx\n");
 652                 return -ENOSPC;
 653         }
 654
 655         spin_lock_irqsave(&priv->hcmd_lock, flags);
 656
 657         tfd = &txq->bd[q->first_empty];
 658         memset(tfd, 0, sizeof(*tfd));
 659
 660         control_flags = (u32 *) tfd;
 661
 662         idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
 663         out_cmd = &txq->cmd[idx];
 664
 665         out_cmd->hdr.cmd = cmd->id;
 666         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 667         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 668
 669         /* At this point, the out_cmd now has all of the incoming cmd
 670          * information */
 671
 672         out_cmd->hdr.flags = 0;
 673         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 674                         INDEX_TO_SEQ(q->first_empty));
 675         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 676                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 677
 678         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 679                         offsetof(struct iwl_cmd, hdr);
 680         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 681
 682         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 683                      "%d bytes at %d[%d]:%d\n",
 684                      get_cmd_string(out_cmd->hdr.cmd),
 685                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 686                      fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
 687
 688         txq->need_update = 1;
 689         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 690         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
 691         iwl_tx_queue_update_write_ptr(priv, txq);
 692
 693         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 694         return ret ? ret : idx;
 695 }
 696
 697 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 698 {
 699         int ret;
 700
 701         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 702
 703         /* An asynchronous command can not expect an SKB to be set. */
 704         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 705
 706         /* An asynchronous command MUST have a callback. */
 707         BUG_ON(!cmd->meta.u.callback);
 708
 709         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 710                 return -EBUSY;
 711
 712         ret = iwl_enqueue_hcmd(priv, cmd);
 713         if (ret < 0) {
 714                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 715                           get_cmd_string(cmd->id), ret);
 716                 return ret;
 717         }
 718         return 0;
 719 }
 720
 721 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 722 {
 723         int cmd_idx;
 724         int ret;
 725         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 726
 727         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 728
 729          /* A synchronous command can not have a callback set. */
 730         BUG_ON(cmd->meta.u.callback != NULL);
 731
 732         if (atomic_xchg(&entry, 1)) {
 733                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 734                           get_cmd_string(cmd->id));
 735                 return -EBUSY;
 736         }
 737
 738         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 739
 740         if (cmd->meta.flags & CMD_WANT_SKB)
 741                 cmd->meta.source = &cmd->meta;
 742
 743         cmd_idx = iwl_enqueue_hcmd(priv, cmd);
 744         if (cmd_idx < 0) {
 745                 ret = cmd_idx;
 746                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 747                           get_cmd_string(cmd->id), ret);
 748                 goto out;
 749         }
 750
 751         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 752                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 753                         HOST_COMPLETE_TIMEOUT);
 754         if (!ret) {
 755                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 756                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 757                                   get_cmd_string(cmd->id),
 758                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 759
 760                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 761                         ret = -ETIMEDOUT;
 762                         goto cancel;
 763                 }
 764         }
 765
 766         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 767                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 768                                get_cmd_string(cmd->id));
 769                 ret = -ECANCELED;
 770                 goto fail;
 771         }
 772         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 773                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 774                                get_cmd_string(cmd->id));
 775                 ret = -EIO;
 776                 goto fail;
 777         }
 778         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 779                 IWL_ERROR("Error: Response NULL in '%s'\n",
 780                           get_cmd_string(cmd->id));
 781                 ret = -EIO;
 782                 goto out;
 783         }
 784
 785         ret = 0;
 786         goto out;
 787
 788 cancel:
 789         if (cmd->meta.flags & CMD_WANT_SKB) {
 790                 struct iwl_cmd *qcmd;
 791
 792                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 793                  * TX cmd queue. Otherwise in case the cmd comes
 794                  * in later, it will possibly set an invalid
 795                  * address (cmd->meta.source). */
 796                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 797                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 798         }
 799 fail:
 800         if (cmd->meta.u.skb) {
 801                 dev_kfree_skb_any(cmd->meta.u.skb);
 802                 cmd->meta.u.skb = NULL;
 803         }
 804 out:
 805         atomic_set(&entry, 0);
 806         return ret;
 807 }
 808
 809 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 810 {
 811         /* A command can not be asynchronous AND expect an SKB to be set. */
 812         BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
 813                (cmd->meta.flags & CMD_WANT_SKB));
 814
 815         if (cmd->meta.flags & CMD_ASYNC)
 816                 return iwl_send_cmd_async(priv, cmd);
 817
 818         return iwl_send_cmd_sync(priv, cmd);
 819 }
 820
 821 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
 822 {
 823         struct iwl_host_cmd cmd = {
 824                 .id = id,
 825                 .len = len,
 826                 .data = data,
 827         };
 828
 829         return iwl_send_cmd_sync(priv, &cmd);
 830 }
 831
 832 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
 833 {
 834         struct iwl_host_cmd cmd = {
 835                 .id = id,
 836                 .len = sizeof(val),
 837                 .data = &val,
 838         };
 839
 840         return iwl_send_cmd_sync(priv, &cmd);
 841 }
 842
 843 int iwl_send_statistics_request(struct iwl_priv *priv)
 844 {
 845         return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 846 }
 847
 848 /**
 849  * iwl_rxon_add_station - add station into station table.
 850  *
 851  * there is only one AP station with id= IWL_AP_ID
 852  * NOTE: mutex must be held before calling the this fnction
 853 */
 854 static int iwl_rxon_add_station(struct iwl_priv *priv,
 855                                 const u8 *addr, int is_ap)
 856 {
 857         u8 sta_id;
 858
 859         sta_id = iwl_add_station(priv, addr, is_ap, 0);
 860         iwl4965_add_station(priv, addr, is_ap);
 861
 862         return sta_id;
 863 }
 864
 865 /**
 866  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 867  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 868  * @channel: Any channel valid for the requested phymode
 869
 870  * In addition to setting the staging RXON, priv->phymode is also set.
 871  *
 872  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 873  * in the staging RXON flag structure based on the phymode
 874  */
 875 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
 876 {
 877         if (!iwl_get_channel_info(priv, phymode, channel)) {
 878                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 879                                channel, phymode);
 880                 return -EINVAL;
 881         }
 882
 883         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 884             (priv->phymode == phymode))
 885                 return 0;
 886
 887         priv->staging_rxon.channel = cpu_to_le16(channel);
 888         if (phymode == MODE_IEEE80211A)
 889                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 890         else
 891                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 892
 893         priv->phymode = phymode;
 894
 895         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 896
 897         return 0;
 898 }
 899
 900 /**
 901  * iwl_check_rxon_cmd - validate RXON structure is valid
 902  *
 903  * NOTE:  This is really only useful during development and can eventually
 904  * be #ifdef'd out once the driver is stable and folks aren't actively
 905  * making changes
 906  */
 907 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 908 {
 909         int error = 0;
 910         int counter = 1;
 911
 912         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 913                 error |= le32_to_cpu(rxon->flags &
 914                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 915                                  RXON_FLG_RADAR_DETECT_MSK));
 916                 if (error)
 917                         IWL_WARNING("check 24G fields %d | %d\n",
 918                                     counter++, error);
 919         } else {
 920                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 921                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 922                 if (error)
 923                         IWL_WARNING("check 52 fields %d | %d\n",
 924                                     counter++, error);
 925                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 926                 if (error)
 927                         IWL_WARNING("check 52 CCK %d | %d\n",
 928                                     counter++, error);
 929         }
 930         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 931         if (error)
 932                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 933
 934         /* make sure basic rates 6Mbps and 1Mbps are supported */
 935         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 936                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 937         if (error)
 938                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 939
 940         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 941         if (error)
 942                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 943
 944         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 945                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 946         if (error)
 947                 IWL_WARNING("check CCK and short slot %d | %d\n",
 948                             counter++, error);
 949
 950         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 951                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 952         if (error)
 953                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 954                             counter++, error);
 955
 956         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 957                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 958         if (error)
 959                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 960                             counter++, error);
 961
 962         if (error)
 963                 IWL_WARNING("Tuning to channel %d\n",
 964                             le16_to_cpu(rxon->channel));
 965
 966         if (error) {
 967                 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
 968                 return -1;
 969         }
 970         return 0;
 971 }
 972
 973 /**
 974  * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
 975  * @priv: staging_rxon is comapred to active_rxon
 976  *
 977  * If the RXON structure is changing sufficient to require a new
 978  * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
 979  * to indicate a new tune is required.
 980  */
 981 static int iwl_full_rxon_required(struct iwl_priv *priv)
 982 {
 983
 984         /* These items are only settable from the full RXON command */
 985         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 986             compare_ether_addr(priv->staging_rxon.bssid_addr,
 987                                priv->active_rxon.bssid_addr) ||
 988             compare_ether_addr(priv->staging_rxon.node_addr,
 989                                priv->active_rxon.node_addr) ||
 990             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 991                                priv->active_rxon.wlap_bssid_addr) ||
 992             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 993             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 994             (priv->staging_rxon.air_propagation !=
 995              priv->active_rxon.air_propagation) ||
 996             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 997              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 998             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 999              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
1000             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1001             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1002                 return 1;
1003
1004         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1005          * be updated with the RXON_ASSOC command -- however only some
1006          * flag transitions are allowed using RXON_ASSOC */
1007
1008         /* Check if we are not switching bands */
1009         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1010             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1011                 return 1;
1012
1013         /* Check if we are switching association toggle */
1014         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1015                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1016                 return 1;
1017
1018         return 0;
1019 }
1020
1021 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1022 {
1023         int rc = 0;
1024         struct iwl_rx_packet *res = NULL;
1025         struct iwl_rxon_assoc_cmd rxon_assoc;
1026         struct iwl_host_cmd cmd = {
1027                 .id = REPLY_RXON_ASSOC,
1028                 .len = sizeof(rxon_assoc),
1029                 .meta.flags = CMD_WANT_SKB,
1030                 .data = &rxon_assoc,
1031         };
1032         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1033         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1034
1035         if ((rxon1->flags == rxon2->flags) &&
1036             (rxon1->filter_flags == rxon2->filter_flags) &&
1037             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1038             (rxon1->ofdm_ht_single_stream_basic_rates ==
1039              rxon2->ofdm_ht_single_stream_basic_rates) &&
1040             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1041              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1042             (rxon1->rx_chain == rxon2->rx_chain) &&
1043             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1044                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1045                 return 0;
1046         }
1047
1048         rxon_assoc.flags = priv->staging_rxon.flags;
1049         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1050         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1051         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1052         rxon_assoc.reserved = 0;
1053         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1054             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1055         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1056             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1057         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1058
1059         rc = iwl_send_cmd_sync(priv, &cmd);
1060         if (rc)
1061                 return rc;
1062
1063         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1064         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1065                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1066                 rc = -EIO;
1067         }
1068
1069         priv->alloc_rxb_skb--;
1070         dev_kfree_skb_any(cmd.meta.u.skb);
1071
1072         return rc;
1073 }
1074
1075 /**
1076  * iwl_commit_rxon - commit staging_rxon to hardware
1077  *
1078  * The RXON command in staging_rxon is commited to the hardware and
1079  * the active_rxon structure is updated with the new data.  This
1080  * function correctly transitions out of the RXON_ASSOC_MSK state if
1081  * a HW tune is required based on the RXON structure changes.
1082  */
1083 static int iwl_commit_rxon(struct iwl_priv *priv)
1084 {
1085         /* cast away the const for active_rxon in this function */
1086         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1087         DECLARE_MAC_BUF(mac);
1088         int rc = 0;
1089
1090         if (!iwl_is_alive(priv))
1091                 return -1;
1092
1093         /* always get timestamp with Rx frame */
1094         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1095
1096         rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1097         if (rc) {
1098                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1099                 return -EINVAL;
1100         }
1101
1102         /* If we don't need to send a full RXON, we can use
1103          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1104          * and other flags for the current radio configuration. */
1105         if (!iwl_full_rxon_required(priv)) {
1106                 rc = iwl_send_rxon_assoc(priv);
1107                 if (rc) {
1108                         IWL_ERROR("Error setting RXON_ASSOC "
1109                                   "configuration (%d).\n", rc);
1110                         return rc;
1111                 }
1112
1113                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1114
1115                 return 0;
1116         }
1117
1118         /* station table will be cleared */
1119         priv->assoc_station_added = 0;
1120
1121 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1122         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1123         if (!priv->error_recovering)
1124                 priv->start_calib = 0;
1125
1126         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1127 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1128
1129         /* If we are currently associated and the new config requires
1130          * an RXON_ASSOC and the new config wants the associated mask enabled,
1131          * we must clear the associated from the active configuration
1132          * before we apply the new config */
1133         if (iwl_is_associated(priv) &&
1134             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1135                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1136                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1137
1138                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1139                                       sizeof(struct iwl_rxon_cmd),
1140                                       &priv->active_rxon);
1141
1142                 /* If the mask clearing failed then we set
1143                  * active_rxon back to what it was previously */
1144                 if (rc) {
1145                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1146                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1147                                   "configuration (%d).\n", rc);
1148                         return rc;
1149                 }
1150         }
1151
1152         IWL_DEBUG_INFO("Sending RXON\n"
1153                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1154                        "* channel = %d\n"
1155                        "* bssid = %s\n",
1156                        ((priv->staging_rxon.filter_flags &
1157                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1158                        le16_to_cpu(priv->staging_rxon.channel),
1159                        print_mac(mac, priv->staging_rxon.bssid_addr));
1160
1161         /* Apply the new configuration */
1162         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1163                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1164         if (rc) {
1165                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1166                 return rc;
1167         }
1168
1169         iwl_clear_stations_table(priv);
1170
1171 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1172         if (!priv->error_recovering)
1173                 priv->start_calib = 0;
1174
1175         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1176         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1177 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1178
1179         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1180
1181         /* If we issue a new RXON command which required a tune then we must
1182          * send a new TXPOWER command or we won't be able to Tx any frames */
1183         rc = iwl_hw_reg_send_txpower(priv);
1184         if (rc) {
1185                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1186                 return rc;
1187         }
1188
1189         /* Add the broadcast address so we can send broadcast frames */
1190         if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1191             IWL_INVALID_STATION) {
1192                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1193                 return -EIO;
1194         }
1195
1196         /* If we have set the ASSOC_MSK and we are in BSS mode then
1197          * add the IWL_AP_ID to the station rate table */
1198         if (iwl_is_associated(priv) &&
1199             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1200                 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1201                     == IWL_INVALID_STATION) {
1202                         IWL_ERROR("Error adding AP address for transmit.\n");
1203                         return -EIO;
1204                 }
1205                 priv->assoc_station_added = 1;
1206         }
1207
1208         return 0;
1209 }
1210
1211 static int iwl_send_bt_config(struct iwl_priv *priv)
1212 {
1213         struct iwl_bt_cmd bt_cmd = {
1214                 .flags = 3,
1215                 .lead_time = 0xAA,
1216                 .max_kill = 1,
1217                 .kill_ack_mask = 0,
1218                 .kill_cts_mask = 0,
1219         };
1220
1221         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1222                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1223 }
1224
1225 static int iwl_send_scan_abort(struct iwl_priv *priv)
1226 {
1227         int rc = 0;
1228         struct iwl_rx_packet *res;
1229         struct iwl_host_cmd cmd = {
1230                 .id = REPLY_SCAN_ABORT_CMD,
1231                 .meta.flags = CMD_WANT_SKB,
1232         };
1233
1234         /* If there isn't a scan actively going on in the hardware
1235          * then we are in between scan bands and not actually
1236          * actively scanning, so don't send the abort command */
1237         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1238                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1239                 return 0;
1240         }
1241
1242         rc = iwl_send_cmd_sync(priv, &cmd);
1243         if (rc) {
1244                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1245                 return rc;
1246         }
1247
1248         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1249         if (res->u.status != CAN_ABORT_STATUS) {
1250                 /* The scan abort will return 1 for success or
1251                  * 2 for "failure".  A failure condition can be
1252                  * due to simply not being in an active scan which
1253                  * can occur if we send the scan abort before we
1254                  * the microcode has notified us that a scan is
1255                  * completed. */
1256                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1257                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1258                 clear_bit(STATUS_SCAN_HW, &priv->status);
1259         }
1260
1261         dev_kfree_skb_any(cmd.meta.u.skb);
1262
1263         return rc;
1264 }
1265
1266 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1267                                         struct iwl_cmd *cmd,
1268                                         struct sk_buff *skb)
1269 {
1270         return 1;
1271 }
1272
1273 /*
1274  * CARD_STATE_CMD
1275  *
1276  * Use: Sets the internal card state to enable, disable, or halt
1277  *
1278  * When in the 'enable' state the card operates as normal.
1279  * When in the 'disable' state, the card enters into a low power mode.
1280  * When in the 'halt' state, the card is shut down and must be fully
1281  * restarted to come back on.
1282  */
1283 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1284 {
1285         struct iwl_host_cmd cmd = {
1286                 .id = REPLY_CARD_STATE_CMD,
1287                 .len = sizeof(u32),
1288                 .data = &flags,
1289                 .meta.flags = meta_flag,
1290         };
1291
1292         if (meta_flag & CMD_ASYNC)
1293                 cmd.meta.u.callback = iwl_card_state_sync_callback;
1294
1295         return iwl_send_cmd(priv, &cmd);
1296 }
1297
1298 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1299                                      struct iwl_cmd *cmd, struct sk_buff *skb)
1300 {
1301         struct iwl_rx_packet *res = NULL;
1302
1303         if (!skb) {
1304                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1305                 return 1;
1306         }
1307
1308         res = (struct iwl_rx_packet *)skb->data;
1309         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1310                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1311                           res->hdr.flags);
1312                 return 1;
1313         }
1314
1315         switch (res->u.add_sta.status) {
1316         case ADD_STA_SUCCESS_MSK:
1317                 break;
1318         default:
1319                 break;
1320         }
1321
1322         /* We didn't cache the SKB; let the caller free it */
1323         return 1;
1324 }
1325
1326 int iwl_send_add_station(struct iwl_priv *priv,
1327                          struct iwl_addsta_cmd *sta, u8 flags)
1328 {
1329         struct iwl_rx_packet *res = NULL;
1330         int rc = 0;
1331         struct iwl_host_cmd cmd = {
1332                 .id = REPLY_ADD_STA,
1333                 .len = sizeof(struct iwl_addsta_cmd),
1334                 .meta.flags = flags,
1335                 .data = sta,
1336         };
1337
1338         if (flags & CMD_ASYNC)
1339                 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1340         else
1341                 cmd.meta.flags |= CMD_WANT_SKB;
1342
1343         rc = iwl_send_cmd(priv, &cmd);
1344
1345         if (rc || (flags & CMD_ASYNC))
1346                 return rc;
1347
1348         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1349         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1350                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1351                           res->hdr.flags);
1352                 rc = -EIO;
1353         }
1354
1355         if (rc == 0) {
1356                 switch (res->u.add_sta.status) {
1357                 case ADD_STA_SUCCESS_MSK:
1358                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1359                         break;
1360                 default:
1361                         rc = -EIO;
1362                         IWL_WARNING("REPLY_ADD_STA failed\n");
1363                         break;
1364                 }
1365         }
1366
1367         priv->alloc_rxb_skb--;
1368         dev_kfree_skb_any(cmd.meta.u.skb);
1369
1370         return rc;
1371 }
1372
1373 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1374                                    struct ieee80211_key_conf *keyconf,
1375                                    u8 sta_id)
1376 {
1377         unsigned long flags;
1378         __le16 key_flags = 0;
1379
1380         switch (keyconf->alg) {
1381         case ALG_CCMP:
1382                 key_flags |= STA_KEY_FLG_CCMP;
1383                 key_flags |= cpu_to_le16(
1384                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1385                 key_flags &= ~STA_KEY_FLG_INVALID;
1386                 break;
1387         case ALG_TKIP:
1388         case ALG_WEP:
1389                 return -EINVAL;
1390         default:
1391                 return -EINVAL;
1392         }
1393         spin_lock_irqsave(&priv->sta_lock, flags);
1394         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1395         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1396         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1397                keyconf->keylen);
1398
1399         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1400                keyconf->keylen);
1401         priv->stations[sta_id].sta.key.key_flags = key_flags;
1402         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1403         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1404
1405         spin_unlock_irqrestore(&priv->sta_lock, flags);
1406
1407         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1408         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1409         return 0;
1410 }
1411
1412 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1413 {
1414         unsigned long flags;
1415
1416         spin_lock_irqsave(&priv->sta_lock, flags);
1417         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1418         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1419         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1420         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1421         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1422         spin_unlock_irqrestore(&priv->sta_lock, flags);
1423
1424         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1425         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1426         return 0;
1427 }
1428
1429 static void iwl_clear_free_frames(struct iwl_priv *priv)
1430 {
1431         struct list_head *element;
1432
1433         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1434                        priv->frames_count);
1435
1436         while (!list_empty(&priv->free_frames)) {
1437                 element = priv->free_frames.next;
1438                 list_del(element);
1439                 kfree(list_entry(element, struct iwl_frame, list));
1440                 priv->frames_count--;
1441         }
1442
1443         if (priv->frames_count) {
1444                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1445                             priv->frames_count);
1446                 priv->frames_count = 0;
1447         }
1448 }
1449
1450 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1451 {
1452         struct iwl_frame *frame;
1453         struct list_head *element;
1454         if (list_empty(&priv->free_frames)) {
1455                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1456                 if (!frame) {
1457                         IWL_ERROR("Could not allocate frame!\n");
1458                         return NULL;
1459                 }
1460
1461                 priv->frames_count++;
1462                 return frame;
1463         }
1464
1465         element = priv->free_frames.next;
1466         list_del(element);
1467         return list_entry(element, struct iwl_frame, list);
1468 }
1469
1470 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1471 {
1472         memset(frame, 0, sizeof(*frame));
1473         list_add(&frame->list, &priv->free_frames);
1474 }
1475
1476 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1477                                 struct ieee80211_hdr *hdr,
1478                                 const u8 *dest, int left)
1479 {
1480
1481         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1482             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1483              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1484                 return 0;
1485
1486         if (priv->ibss_beacon->len > left)
1487                 return 0;
1488
1489         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1490
1491         return priv->ibss_beacon->len;
1492 }
1493
1494 int iwl_rate_index_from_plcp(int plcp)
1495 {
1496         int i = 0;
1497
1498         if (plcp & RATE_MCS_HT_MSK) {
1499                 i = (plcp & 0xff);
1500
1501                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1502                         i = i - IWL_RATE_MIMO_6M_PLCP;
1503
1504                 i += IWL_FIRST_OFDM_RATE;
1505                 /* skip 9M not supported in ht*/
1506                 if (i >= IWL_RATE_9M_INDEX)
1507                         i += 1;
1508                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1509                     (i <= IWL_LAST_OFDM_RATE))
1510                         return i;
1511         } else {
1512                 for (i = 0; i < ARRAY_SIZE(iwl_rates); i++)
1513                         if (iwl_rates[i].plcp == (plcp &0xFF))
1514                                 return i;
1515         }
1516         return -1;
1517 }
1518
1519 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1520 {
1521         u8 i;
1522
1523         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1524              i = iwl_rates[i].next_ieee) {
1525                 if (rate_mask & (1 << i))
1526                         return iwl_rates[i].plcp;
1527         }
1528
1529         return IWL_RATE_INVALID;
1530 }
1531
1532 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1533 {
1534         struct iwl_frame *frame;
1535         unsigned int frame_size;
1536         int rc;
1537         u8 rate;
1538
1539         frame = iwl_get_free_frame(priv);
1540
1541         if (!frame) {
1542                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1543                           "command.\n");
1544                 return -ENOMEM;
1545         }
1546
1547         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1548                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1549                                                 0xFF0);
1550                 if (rate == IWL_INVALID_RATE)
1551                         rate = IWL_RATE_6M_PLCP;
1552         } else {
1553                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1554                 if (rate == IWL_INVALID_RATE)
1555                         rate = IWL_RATE_1M_PLCP;
1556         }
1557
1558         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1559
1560         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1561                               &frame->u.cmd[0]);
1562
1563         iwl_free_frame(priv, frame);
1564
1565         return rc;
1566 }
1567
1568 /******************************************************************************
1569  *
1570  * EEPROM related functions
1571  *
1572  ******************************************************************************/
1573
1574 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1575 {
1576         memcpy(mac, priv->eeprom.mac_address, 6);
1577 }
1578
1579 /**
1580  * iwl_eeprom_init - read EEPROM contents
1581  *
1582  * Load the EEPROM from adapter into priv->eeprom
1583  *
1584  * NOTE:  This routine uses the non-debug IO access functions.
1585  */
1586 int iwl_eeprom_init(struct iwl_priv *priv)
1587 {
1588         u16 *e = (u16 *)&priv->eeprom;
1589         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1590         u32 r;
1591         int sz = sizeof(priv->eeprom);
1592         int rc;
1593         int i;
1594         u16 addr;
1595
1596         /* The EEPROM structure has several padding buffers within it
1597          * and when adding new EEPROM maps is subject to programmer errors
1598          * which may be very difficult to identify without explicitly
1599          * checking the resulting size of the eeprom map. */
1600         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1601
1602         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1603                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1604                 return -ENOENT;
1605         }
1606
1607         rc = iwl_eeprom_aqcuire_semaphore(priv);
1608         if (rc < 0) {
1609                 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1610                 return -ENOENT;
1611         }
1612
1613         /* eeprom is an array of 16bit values */
1614         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1615                 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1616                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1617
1618                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1619                                         i += IWL_EEPROM_ACCESS_DELAY) {
1620                         r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1621                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1622                                 break;
1623                         udelay(IWL_EEPROM_ACCESS_DELAY);
1624                 }
1625
1626                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1627                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1628                         rc = -ETIMEDOUT;
1629                         goto done;
1630                 }
1631                 e[addr / 2] = le16_to_cpu(r >> 16);
1632         }
1633         rc = 0;
1634
1635 done:
1636         iwl_eeprom_release_semaphore(priv);
1637         return rc;
1638 }
1639
1640 /******************************************************************************
1641  *
1642  * Misc. internal state and helper functions
1643  *
1644  ******************************************************************************/
1645 #ifdef CONFIG_IWLWIFI_DEBUG
1646
1647 /**
1648  * iwl_report_frame - dump frame to syslog during debug sessions
1649  *
1650  * hack this function to show different aspects of received frames,
1651  * including selective frame dumps.
1652  * group100 parameter selects whether to show 1 out of 100 good frames.
1653  *
1654  * TODO:  ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1655  *        info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1656  *        is 3945-specific and gives bad output for 4965.  Need to split the
1657  *        functionality, keep common stuff here.
1658  */
1659 void iwl_report_frame(struct iwl_priv *priv,
1660                       struct iwl_rx_packet *pkt,
1661                       struct ieee80211_hdr *header, int group100)
1662 {
1663         u32 to_us;
1664         u32 print_summary = 0;
1665         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1666         u32 hundred = 0;
1667         u32 dataframe = 0;
1668         u16 fc;
1669         u16 seq_ctl;
1670         u16 channel;
1671         u16 phy_flags;
1672         int rate_sym;
1673         u16 length;
1674         u16 status;
1675         u16 bcn_tmr;
1676         u32 tsf_low;
1677         u64 tsf;
1678         u8 rssi;
1679         u8 agc;
1680         u16 sig_avg;
1681         u16 noise_diff;
1682         struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1683         struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1684         struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1685         u8 *data = IWL_RX_DATA(pkt);
1686
1687         /* MAC header */
1688         fc = le16_to_cpu(header->frame_control);
1689         seq_ctl = le16_to_cpu(header->seq_ctrl);
1690
1691         /* metadata */
1692         channel = le16_to_cpu(rx_hdr->channel);
1693         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1694         rate_sym = rx_hdr->rate;
1695         length = le16_to_cpu(rx_hdr->len);
1696
1697         /* end-of-frame status and timestamp */
1698         status = le32_to_cpu(rx_end->status);
1699         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1700         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1701         tsf = le64_to_cpu(rx_end->timestamp);
1702
1703         /* signal statistics */
1704         rssi = rx_stats->rssi;
1705         agc = rx_stats->agc;
1706         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1707         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1708
1709         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1710
1711         /* if data frame is to us and all is good,
1712          *   (optionally) print summary for only 1 out of every 100 */
1713         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1714             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1715                 dataframe = 1;
1716                 if (!group100)
1717                         print_summary = 1;      /* print each frame */
1718                 else if (priv->framecnt_to_us < 100) {
1719                         priv->framecnt_to_us++;
1720                         print_summary = 0;
1721                 } else {
1722                         priv->framecnt_to_us = 0;
1723                         print_summary = 1;
1724                         hundred = 1;
1725                 }
1726         } else {
1727                 /* print summary for all other frames */
1728                 print_summary = 1;
1729         }
1730
1731         if (print_summary) {
1732                 char *title;
1733                 u32 rate;
1734
1735                 if (hundred)
1736                         title = "100Frames";
1737                 else if (fc & IEEE80211_FCTL_RETRY)
1738                         title = "Retry";
1739                 else if (ieee80211_is_assoc_response(fc))
1740                         title = "AscRsp";
1741                 else if (ieee80211_is_reassoc_response(fc))
1742                         title = "RasRsp";
1743                 else if (ieee80211_is_probe_response(fc)) {
1744                         title = "PrbRsp";
1745                         print_dump = 1; /* dump frame contents */
1746                 } else if (ieee80211_is_beacon(fc)) {
1747                         title = "Beacon";
1748                         print_dump = 1; /* dump frame contents */
1749                 } else if (ieee80211_is_atim(fc))
1750                         title = "ATIM";
1751                 else if (ieee80211_is_auth(fc))
1752                         title = "Auth";
1753                 else if (ieee80211_is_deauth(fc))
1754                         title = "DeAuth";
1755                 else if (ieee80211_is_disassoc(fc))
1756                         title = "DisAssoc";
1757                 else
1758                         title = "Frame";
1759
1760                 rate = iwl_rate_index_from_plcp(rate_sym);
1761                 if (rate == -1)
1762                         rate = 0;
1763                 else
1764                         rate = iwl_rates[rate].ieee / 2;
1765
1766                 /* print frame summary.
1767                  * MAC addresses show just the last byte (for brevity),
1768                  *    but you can hack it to show more, if you'd like to. */
1769                 if (dataframe)
1770                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1771                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1772                                      title, fc, header->addr1[5],
1773                                      length, rssi, channel, rate);
1774                 else {
1775                         /* src/dst addresses assume managed mode */
1776                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1777                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1778                                      "phy=0x%02x, chnl=%d\n",
1779                                      title, fc, header->addr1[5],
1780                                      header->addr3[5], rssi,
1781                                      tsf_low - priv->scan_start_tsf,
1782                                      phy_flags, channel);
1783                 }
1784         }
1785         if (print_dump)
1786                 iwl_print_hex_dump(IWL_DL_RX, data, length);
1787 }
1788 #endif
1789
1790 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1791 {
1792         if (priv->hw_setting.shared_virt)
1793                 pci_free_consistent(priv->pci_dev,
1794                                     sizeof(struct iwl_shared),
1795                                     priv->hw_setting.shared_virt,
1796                                     priv->hw_setting.shared_phys);
1797 }
1798
1799 /**
1800  * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1801  *
1802  * return : set the bit for each supported rate insert in ie
1803  */
1804 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1805                                     u16 basic_rate, int max_count)
1806 {
1807         u16 ret_rates = 0, bit;
1808         int i;
1809         u8 *rates;
1810
1811         rates = &(ie[1]);
1812
1813         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1814                 if (bit & supported_rate) {
1815                         ret_rates |= bit;
1816                         rates[*ie] = iwl_rates[i].ieee |
1817                             ((bit & basic_rate) ? 0x80 : 0x00);
1818                         *ie = *ie + 1;
1819                         if (*ie >= max_count)
1820                                 break;
1821                 }
1822         }
1823
1824         return ret_rates;
1825 }
1826
1827 #ifdef CONFIG_IWLWIFI_HT
1828 void static iwl_set_ht_capab(struct ieee80211_hw *hw,
1829                              struct ieee80211_ht_capability *ht_cap,
1830                              u8 use_wide_chan);
1831 #endif
1832
1833 /**
1834  * iwl_fill_probe_req - fill in all required fields and IE for probe request
1835  */
1836 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1837                               struct ieee80211_mgmt *frame,
1838                               int left, int is_direct)
1839 {
1840         int len = 0;
1841         u8 *pos = NULL;
1842         u16 ret_rates;
1843
1844         /* Make sure there is enough space for the probe request,
1845          * two mandatory IEs and the data */
1846         left -= 24;
1847         if (left < 0)
1848                 return 0;
1849         len += 24;
1850
1851         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1852         memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1853         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1854         memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1855         frame->seq_ctrl = 0;
1856
1857         /* fill in our indirect SSID IE */
1858         /* ...next IE... */
1859
1860         left -= 2;
1861         if (left < 0)
1862                 return 0;
1863         len += 2;
1864         pos = &(frame->u.probe_req.variable[0]);
1865         *pos++ = WLAN_EID_SSID;
1866         *pos++ = 0;
1867
1868         /* fill in our direct SSID IE... */
1869         if (is_direct) {
1870                 /* ...next IE... */
1871                 left -= 2 + priv->essid_len;
1872                 if (left < 0)
1873                         return 0;
1874                 /* ... fill it in... */
1875                 *pos++ = WLAN_EID_SSID;
1876                 *pos++ = priv->essid_len;
1877                 memcpy(pos, priv->essid, priv->essid_len);
1878                 pos += priv->essid_len;
1879                 len += 2 + priv->essid_len;
1880         }
1881
1882         /* fill in supported rate */
1883         /* ...next IE... */
1884         left -= 2;
1885         if (left < 0)
1886                 return 0;
1887         /* ... fill it in... */
1888         *pos++ = WLAN_EID_SUPP_RATES;
1889         *pos = 0;
1890         ret_rates = priv->active_rate = priv->rates_mask;
1891         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1892
1893         iwl_supported_rate_to_ie(pos, priv->active_rate,
1894                                  priv->active_rate_basic, left);
1895         len += 2 + *pos;
1896         pos += (*pos) + 1;
1897         ret_rates = ~ret_rates & priv->active_rate;
1898
1899         if (ret_rates == 0)
1900                 goto fill_end;
1901
1902         /* fill in supported extended rate */
1903         /* ...next IE... */
1904         left -= 2;
1905         if (left < 0)
1906                 return 0;
1907         /* ... fill it in... */
1908         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1909         *pos = 0;
1910         iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left);
1911         if (*pos > 0)
1912                 len += 2 + *pos;
1913
1914 #ifdef CONFIG_IWLWIFI_HT
1915         if (is_direct && priv->is_ht_enabled) {
1916                 u8 use_wide_chan = 1;
1917
1918                 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
1919                         use_wide_chan = 0;
1920                 pos += (*pos) + 1;
1921                 *pos++ = WLAN_EID_HT_CAPABILITY;
1922                 *pos++ = sizeof(struct ieee80211_ht_capability);
1923                 iwl_set_ht_capab(NULL, (struct ieee80211_ht_capability *)pos,
1924                                  use_wide_chan);
1925                 len += 2 + sizeof(struct ieee80211_ht_capability);
1926         }
1927 #endif  /*CONFIG_IWLWIFI_HT */
1928
1929  fill_end:
1930         return (u16)len;
1931 }
1932
1933 /*
1934  * QoS  support
1935 */
1936 #ifdef CONFIG_IWLWIFI_QOS
1937 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1938                                        struct iwl_qosparam_cmd *qos)
1939 {
1940
1941         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1942                                 sizeof(struct iwl_qosparam_cmd), qos);
1943 }
1944
1945 static void iwl_reset_qos(struct iwl_priv *priv)
1946 {
1947         u16 cw_min = 15;
1948         u16 cw_max = 1023;
1949         u8 aifs = 2;
1950         u8 is_legacy = 0;
1951         unsigned long flags;
1952         int i;
1953
1954         spin_lock_irqsave(&priv->lock, flags);
1955         priv->qos_data.qos_active = 0;
1956
1957         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1958                 if (priv->qos_data.qos_enable)
1959                         priv->qos_data.qos_active = 1;
1960                 if (!(priv->active_rate & 0xfff0)) {
1961                         cw_min = 31;
1962                         is_legacy = 1;
1963                 }
1964         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1965                 if (priv->qos_data.qos_enable)
1966                         priv->qos_data.qos_active = 1;
1967         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1968                 cw_min = 31;
1969                 is_legacy = 1;
1970         }
1971
1972         if (priv->qos_data.qos_active)
1973                 aifs = 3;
1974
1975         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1976         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1977         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1978         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1979         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1980
1981         if (priv->qos_data.qos_active) {
1982                 i = 1;
1983                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1984                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1985                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1986                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1987                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1988
1989                 i = 2;
1990                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1991                         cpu_to_le16((cw_min + 1) / 2 - 1);
1992                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1993                         cpu_to_le16(cw_max);
1994                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1995                 if (is_legacy)
1996                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1997                                 cpu_to_le16(6016);
1998                 else
1999                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2000                                 cpu_to_le16(3008);
2001                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2002
2003                 i = 3;
2004                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2005                         cpu_to_le16((cw_min + 1) / 4 - 1);
2006                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2007                         cpu_to_le16((cw_max + 1) / 2 - 1);
2008                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2009                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2010                 if (is_legacy)
2011                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2012                                 cpu_to_le16(3264);
2013                 else
2014                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2015                                 cpu_to_le16(1504);
2016         } else {
2017                 for (i = 1; i < 4; i++) {
2018                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2019                                 cpu_to_le16(cw_min);
2020                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2021                                 cpu_to_le16(cw_max);
2022                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2023                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2024                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2025                 }
2026         }
2027         IWL_DEBUG_QOS("set QoS to default \n");
2028
2029         spin_unlock_irqrestore(&priv->lock, flags);
2030 }
2031
2032 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
2033 {
2034         unsigned long flags;
2035
2036         if (priv == NULL)
2037                 return;
2038
2039         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2040                 return;
2041
2042         if (!priv->qos_data.qos_enable)
2043                 return;
2044
2045         spin_lock_irqsave(&priv->lock, flags);
2046         priv->qos_data.def_qos_parm.qos_flags = 0;
2047
2048         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2049             !priv->qos_data.qos_cap.q_AP.txop_request)
2050                 priv->qos_data.def_qos_parm.qos_flags |=
2051                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2052
2053         if (priv->qos_data.qos_active)
2054                 priv->qos_data.def_qos_parm.qos_flags |=
2055                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2056
2057         spin_unlock_irqrestore(&priv->lock, flags);
2058
2059         if (force || iwl_is_associated(priv)) {
2060                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2061                               priv->qos_data.qos_active);
2062
2063                 iwl_send_qos_params_command(priv,
2064                                 &(priv->qos_data.def_qos_parm));
2065         }
2066 }
2067
2068 #endif /* CONFIG_IWLWIFI_QOS */
2069 /*
2070  * Power management (not Tx power!) functions
2071  */
2072 #define MSEC_TO_USEC 1024
2073
2074 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2075 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2076 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2077 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2078                                      __constant_cpu_to_le32(X1), \
2079                                      __constant_cpu_to_le32(X2), \
2080                                      __constant_cpu_to_le32(X3), \
2081                                      __constant_cpu_to_le32(X4)}
2082
2083
2084 /* default power management (not Tx power) table values */
2085 /* for tim  0-10 */
2086 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2087         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2088         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2089         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2090         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2091         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2092         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2093 };
2094
2095 /* for tim > 10 */
2096 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2097         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2098         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2099                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2100         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2101                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2102         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2103                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2104         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2105         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2106                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2107 };
2108
2109 int iwl_power_init_handle(struct iwl_priv *priv)
2110 {
2111         int rc = 0, i;
2112         struct iwl_power_mgr *pow_data;
2113         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2114         u16 pci_pm;
2115
2116         IWL_DEBUG_POWER("Initialize power \n");
2117
2118         pow_data = &(priv->power_data);
2119
2120         memset(pow_data, 0, sizeof(*pow_data));
2121
2122         pow_data->active_index = IWL_POWER_RANGE_0;
2123         pow_data->dtim_val = 0xffff;
2124
2125         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2126         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2127
2128         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2129         if (rc != 0)
2130                 return 0;
2131         else {
2132                 struct iwl_powertable_cmd *cmd;
2133
2134                 IWL_DEBUG_POWER("adjust power command flags\n");
2135
2136                 for (i = 0; i < IWL_POWER_AC; i++) {
2137                         cmd = &pow_data->pwr_range_0[i].cmd;
2138
2139                         if (pci_pm & 0x1)
2140                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2141                         else
2142                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2143                 }
2144         }
2145         return rc;
2146 }
2147
2148 static int iwl_update_power_cmd(struct iwl_priv *priv,
2149                                 struct iwl_powertable_cmd *cmd, u32 mode)
2150 {
2151         int rc = 0, i;
2152         u8 skip;
2153         u32 max_sleep = 0;
2154         struct iwl_power_vec_entry *range;
2155         u8 period = 0;
2156         struct iwl_power_mgr *pow_data;
2157
2158         if (mode > IWL_POWER_INDEX_5) {
2159                 IWL_DEBUG_POWER("Error invalid power mode \n");
2160                 return -1;
2161         }
2162         pow_data = &(priv->power_data);
2163
2164         if (pow_data->active_index == IWL_POWER_RANGE_0)
2165                 range = &pow_data->pwr_range_0[0];
2166         else
2167                 range = &pow_data->pwr_range_1[1];
2168
2169         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2170
2171 #ifdef IWL_MAC80211_DISABLE
2172         if (priv->assoc_network != NULL) {
2173                 unsigned long flags;
2174
2175                 period = priv->assoc_network->tim.tim_period;
2176         }
2177 #endif  /*IWL_MAC80211_DISABLE */
2178         skip = range[mode].no_dtim;
2179
2180         if (period == 0) {
2181                 period = 1;
2182                 skip = 0;
2183         }
2184
2185         if (skip == 0) {
2186                 max_sleep = period;
2187                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2188         } else {
2189                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2190                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2191                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2192         }
2193
2194         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2195                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2196                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2197         }
2198
2199         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2200         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2201         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2202         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2203                         le32_to_cpu(cmd->sleep_interval[0]),
2204                         le32_to_cpu(cmd->sleep_interval[1]),
2205                         le32_to_cpu(cmd->sleep_interval[2]),
2206                         le32_to_cpu(cmd->sleep_interval[3]),
2207                         le32_to_cpu(cmd->sleep_interval[4]));
2208
2209         return rc;
2210 }
2211
2212 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2213 {
2214         u32 final_mode = mode;
2215         int rc;
2216         struct iwl_powertable_cmd cmd;
2217
2218         /* If on battery, set to 3,
2219          * if plugged into AC power, set to CAM ("continuosly aware mode"),
2220          * else user level */
2221         switch (mode) {
2222         case IWL_POWER_BATTERY:
2223                 final_mode = IWL_POWER_INDEX_3;
2224                 break;
2225         case IWL_POWER_AC:
2226                 final_mode = IWL_POWER_MODE_CAM;
2227                 break;
2228         default:
2229                 final_mode = mode;
2230                 break;
2231         }
2232
2233         cmd.keep_alive_beacons = 0;
2234
2235         iwl_update_power_cmd(priv, &cmd, final_mode);
2236
2237         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2238
2239         if (final_mode == IWL_POWER_MODE_CAM)
2240                 clear_bit(STATUS_POWER_PMI, &priv->status);
2241         else
2242                 set_bit(STATUS_POWER_PMI, &priv->status);
2243
2244         return rc;
2245 }
2246
2247 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2248 {
2249         /* Filter incoming packets to determine if they are targeted toward
2250          * this network, discarding packets coming from ourselves */
2251         switch (priv->iw_mode) {
2252         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2253                 /* packets from our adapter are dropped (echo) */
2254                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2255                         return 0;
2256                 /* {broad,multi}cast packets to our IBSS go through */
2257                 if (is_multicast_ether_addr(header->addr1))
2258                         return !compare_ether_addr(header->addr3, priv->bssid);
2259                 /* packets to our adapter go through */
2260                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2261         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2262                 /* packets from our adapter are dropped (echo) */
2263                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2264                         return 0;
2265                 /* {broad,multi}cast packets to our BSS go through */
2266                 if (is_multicast_ether_addr(header->addr1))
2267                         return !compare_ether_addr(header->addr2, priv->bssid);
2268                 /* packets to our adapter go through */
2269                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2270         }
2271
2272         return 1;
2273 }
2274
2275 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2276
2277 const char *iwl_get_tx_fail_reason(u32 status)
2278 {
2279         switch (status & TX_STATUS_MSK) {
2280         case TX_STATUS_SUCCESS:
2281                 return "SUCCESS";
2282                 TX_STATUS_ENTRY(SHORT_LIMIT);
2283                 TX_STATUS_ENTRY(LONG_LIMIT);
2284                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2285                 TX_STATUS_ENTRY(MGMNT_ABORT);
2286                 TX_STATUS_ENTRY(NEXT_FRAG);
2287                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2288                 TX_STATUS_ENTRY(DEST_PS);
2289                 TX_STATUS_ENTRY(ABORTED);
2290                 TX_STATUS_ENTRY(BT_RETRY);
2291                 TX_STATUS_ENTRY(STA_INVALID);
2292                 TX_STATUS_ENTRY(FRAG_DROPPED);
2293                 TX_STATUS_ENTRY(TID_DISABLE);
2294                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2295                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2296                 TX_STATUS_ENTRY(TX_LOCKED);
2297                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2298         }
2299
2300         return "UNKNOWN";
2301 }
2302
2303 /**
2304  * iwl_scan_cancel - Cancel any currently executing HW scan
2305  *
2306  * NOTE: priv->mutex is not required before calling this function
2307  */
2308 static int iwl_scan_cancel(struct iwl_priv *priv)
2309 {
2310         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2311                 clear_bit(STATUS_SCANNING, &priv->status);
2312                 return 0;
2313         }
2314
2315         if (test_bit(STATUS_SCANNING, &priv->status)) {
2316                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2317                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2318                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2319                         queue_work(priv->workqueue, &priv->abort_scan);
2320
2321                 } else
2322                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2323
2324                 return test_bit(STATUS_SCANNING, &priv->status);
2325         }
2326
2327         return 0;
2328 }
2329
2330 /**
2331  * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2332  * @ms: amount of time to wait (in milliseconds) for scan to abort
2333  *
2334  * NOTE: priv->mutex must be held before calling this function
2335  */
2336 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2337 {
2338         unsigned long now = jiffies;
2339         int ret;
2340
2341         ret = iwl_scan_cancel(priv);
2342         if (ret && ms) {
2343                 mutex_unlock(&priv->mutex);
2344                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2345                                 test_bit(STATUS_SCANNING, &priv->status))
2346                         msleep(1);
2347                 mutex_lock(&priv->mutex);
2348
2349                 return test_bit(STATUS_SCANNING, &priv->status);
2350         }
2351
2352         return ret;
2353 }
2354
2355 static void iwl_sequence_reset(struct iwl_priv *priv)
2356 {
2357         /* Reset ieee stats */
2358
2359         /* We don't reset the net_device_stats (ieee->stats) on
2360          * re-association */
2361
2362         priv->last_seq_num = -1;
2363         priv->last_frag_num = -1;
2364         priv->last_packet_time = 0;
2365
2366         iwl_scan_cancel(priv);
2367 }
2368
2369 #define MAX_UCODE_BEACON_INTERVAL       4096
2370 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2371
2372 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2373 {
2374         u16 new_val = 0;
2375         u16 beacon_factor = 0;
2376
2377         beacon_factor =
2378             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2379                 / MAX_UCODE_BEACON_INTERVAL;
2380         new_val = beacon_val / beacon_factor;
2381
2382         return cpu_to_le16(new_val);
2383 }
2384
2385 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2386 {
2387         u64 interval_tm_unit;
2388         u64 tsf, result;
2389         unsigned long flags;
2390         struct ieee80211_conf *conf = NULL;
2391         u16 beacon_int = 0;
2392
2393         conf = ieee80211_get_hw_conf(priv->hw);
2394
2395         spin_lock_irqsave(&priv->lock, flags);
2396         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2397         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2398
2399         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2400
2401         tsf = priv->timestamp1;
2402         tsf = ((tsf << 32) | priv->timestamp0);
2403
2404         beacon_int = priv->beacon_int;
2405         spin_unlock_irqrestore(&priv->lock, flags);
2406
2407         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2408                 if (beacon_int == 0) {
2409                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2410                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2411                 } else {
2412                         priv->rxon_timing.beacon_interval =
2413                                 cpu_to_le16(beacon_int);
2414                         priv->rxon_timing.beacon_interval =
2415                             iwl_adjust_beacon_interval(
2416                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2417                 }
2418
2419                 priv->rxon_timing.atim_window = 0;
2420         } else {
2421                 priv->rxon_timing.beacon_interval =
2422                         iwl_adjust_beacon_interval(conf->beacon_int);
2423                 /* TODO: we need to get atim_window from upper stack
2424                  * for now we set to 0 */
2425                 priv->rxon_timing.atim_window = 0;
2426         }
2427
2428         interval_tm_unit =
2429                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2430         result = do_div(tsf, interval_tm_unit);
2431         priv->rxon_timing.beacon_init_val =
2432             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2433
2434         IWL_DEBUG_ASSOC
2435             ("beacon interval %d beacon timer %d beacon tim %d\n",
2436                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2437                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2438                 le16_to_cpu(priv->rxon_timing.atim_window));
2439 }
2440
2441 static int iwl_scan_initiate(struct iwl_priv *priv)
2442 {
2443         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2444                 IWL_ERROR("APs don't scan.\n");
2445                 return 0;
2446         }
2447
2448         if (!iwl_is_ready_rf(priv)) {
2449                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2450                 return -EIO;
2451         }
2452
2453         if (test_bit(STATUS_SCANNING, &priv->status)) {
2454                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2455                 return -EAGAIN;
2456         }
2457
2458         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2459                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2460                                "Queuing.\n");
2461                 return -EAGAIN;
2462         }
2463
2464         IWL_DEBUG_INFO("Starting scan...\n");
2465         priv->scan_bands = 2;
2466         set_bit(STATUS_SCANNING, &priv->status);
2467         priv->scan_start = jiffies;
2468         priv->scan_pass_start = priv->scan_start;
2469
2470         queue_work(priv->workqueue, &priv->request_scan);
2471
2472         return 0;
2473 }
2474
2475 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2476 {
2477         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2478
2479         if (hw_decrypt)
2480                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2481         else
2482                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2483
2484         return 0;
2485 }
2486
2487 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2488 {
2489         if (phymode == MODE_IEEE80211A) {
2490                 priv->staging_rxon.flags &=
2491                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2492                       | RXON_FLG_CCK_MSK);
2493                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2494         } else {
2495                 /* Copied from iwl_bg_post_associate() */
2496                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2497                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2498                 else
2499                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2500
2501                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2502                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2503
2504                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2505                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2506                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2507         }
2508 }
2509
2510 /*
2511  * initilize rxon structure with default values fromm eeprom
2512  */
2513 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2514 {
2515         const struct iwl_channel_info *ch_info;
2516
2517         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2518
2519         switch (priv->iw_mode) {
2520         case IEEE80211_IF_TYPE_AP:
2521                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2522                 break;
2523
2524         case IEEE80211_IF_TYPE_STA:
2525                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2526                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2527                 break;
2528
2529         case IEEE80211_IF_TYPE_IBSS:
2530                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2531                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2532                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2533                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2534                 break;
2535
2536         case IEEE80211_IF_TYPE_MNTR:
2537                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2538                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2539                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2540                 break;
2541         }
2542
2543 #if 0
2544         /* TODO:  Figure out when short_preamble would be set and cache from
2545          * that */
2546         if (!hw_to_local(priv->hw)->short_preamble)
2547                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2548         else
2549                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2550 #endif
2551
2552         ch_info = iwl_get_channel_info(priv, priv->phymode,
2553                                        le16_to_cpu(priv->staging_rxon.channel));
2554
2555         if (!ch_info)
2556                 ch_info = &priv->channel_info[0];
2557
2558         /*
2559          * in some case A channels are all non IBSS
2560          * in this case force B/G channel
2561          */
2562         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2563             !(is_channel_ibss(ch_info)))
2564                 ch_info = &priv->channel_info[0];
2565
2566         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2567         if (is_channel_a_band(ch_info))
2568                 priv->phymode = MODE_IEEE80211A;
2569         else
2570                 priv->phymode = MODE_IEEE80211G;
2571
2572         iwl_set_flags_for_phymode(priv, priv->phymode);
2573
2574         priv->staging_rxon.ofdm_basic_rates =
2575             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2576         priv->staging_rxon.cck_basic_rates =
2577             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2578
2579         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2580                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2581         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2582         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2583         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2584         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2585         iwl4965_set_rxon_chain(priv);
2586 }
2587
2588 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2589 {
2590         if (!iwl_is_ready_rf(priv))
2591                 return -EAGAIN;
2592
2593         if (mode == IEEE80211_IF_TYPE_IBSS) {
2594                 const struct iwl_channel_info *ch_info;
2595
2596                 ch_info = iwl_get_channel_info(priv,
2597                         priv->phymode,
2598                         le16_to_cpu(priv->staging_rxon.channel));
2599
2600                 if (!ch_info || !is_channel_ibss(ch_info)) {
2601                         IWL_ERROR("channel %d not IBSS channel\n",
2602                                   le16_to_cpu(priv->staging_rxon.channel));
2603                         return -EINVAL;
2604                 }
2605         }
2606
2607         cancel_delayed_work(&priv->scan_check);
2608         if (iwl_scan_cancel_timeout(priv, 100)) {
2609                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2610                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2611                 return -EAGAIN;
2612         }
2613
2614         priv->iw_mode = mode;
2615
2616         iwl_connection_init_rx_config(priv);
2617         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2618
2619         iwl_clear_stations_table(priv);
2620
2621         iwl_commit_rxon(priv);
2622
2623         return 0;
2624 }
2625
2626 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2627                                       struct ieee80211_tx_control *ctl,
2628                                       struct iwl_cmd *cmd,
2629                                       struct sk_buff *skb_frag,
2630                                       int last_frag)
2631 {
2632         struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2633
2634         switch (keyinfo->alg) {
2635         case ALG_CCMP:
2636                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2637                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2638                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2639                 break;
2640
2641         case ALG_TKIP:
2642 #if 0
2643                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2644
2645                 if (last_frag)
2646                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2647                                8);
2648                 else
2649                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2650 #endif
2651                 break;
2652
2653         case ALG_WEP:
2654                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2655                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2656
2657                 if (keyinfo->keylen == 13)
2658                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2659
2660                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2661
2662                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2663                              "with key %d\n", ctl->key_idx);
2664                 break;
2665
2666         case ALG_NONE:
2667                 IWL_DEBUG_TX("Tx packet in the clear (encrypt requested).\n");
2668                 break;
2669
2670         default:
2671                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2672                 break;
2673         }
2674 }
2675
2676 /*
2677  * handle build REPLY_TX command notification.
2678  */
2679 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2680                                   struct iwl_cmd *cmd,
2681                                   struct ieee80211_tx_control *ctrl,
2682                                   struct ieee80211_hdr *hdr,
2683                                   int is_unicast, u8 std_id)
2684 {
2685         __le16 *qc;
2686         u16 fc = le16_to_cpu(hdr->frame_control);
2687         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2688
2689         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2690         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2691                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2692                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2693                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2694                 if (ieee80211_is_probe_response(fc) &&
2695                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2696                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2697         } else {
2698                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2699                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2700         }
2701
2702         cmd->cmd.tx.sta_id = std_id;
2703         if (ieee80211_get_morefrag(hdr))
2704                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2705
2706         qc = ieee80211_get_qos_ctrl(hdr);
2707         if (qc) {
2708                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2709                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2710         } else
2711                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2712
2713         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2714                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2715                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2716         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2717                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2718                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2719         }
2720
2721         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2722                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2723
2724         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2725         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2726                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2727                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2728                         cmd->cmd.tx.timeout.pm_frame_timeout =
2729                                 cpu_to_le16(3);
2730                 else
2731                         cmd->cmd.tx.timeout.pm_frame_timeout =
2732                                 cpu_to_le16(2);
2733         } else
2734                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2735
2736         cmd->cmd.tx.driver_txop = 0;
2737         cmd->cmd.tx.tx_flags = tx_flags;
2738         cmd->cmd.tx.next_frame_len = 0;
2739 }
2740
2741 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2742 {
2743         int sta_id;
2744         u16 fc = le16_to_cpu(hdr->frame_control);
2745         DECLARE_MAC_BUF(mac);
2746
2747         /* If this frame is broadcast or not data then use the broadcast
2748          * station id */
2749         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2750             is_multicast_ether_addr(hdr->addr1))
2751                 return priv->hw_setting.bcast_sta_id;
2752
2753         switch (priv->iw_mode) {
2754
2755         /* If this frame is part of a BSS network (we're a station), then
2756          * we use the AP's station id */
2757         case IEEE80211_IF_TYPE_STA:
2758                 return IWL_AP_ID;
2759
2760         /* If we are an AP, then find the station, or use BCAST */
2761         case IEEE80211_IF_TYPE_AP:
2762                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2763                 if (sta_id != IWL_INVALID_STATION)
2764                         return sta_id;
2765                 return priv->hw_setting.bcast_sta_id;
2766
2767         /* If this frame is part of a IBSS network, then we use the
2768          * target specific station id */
2769         case IEEE80211_IF_TYPE_IBSS:
2770                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2771                 if (sta_id != IWL_INVALID_STATION)
2772                         return sta_id;
2773
2774                 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2775
2776                 if (sta_id != IWL_INVALID_STATION)
2777                         return sta_id;
2778
2779                 IWL_DEBUG_DROP("Station %s not in station map. "
2780                                "Defaulting to broadcast...\n",
2781                                print_mac(mac, hdr->addr1));
2782                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2783                 return priv->hw_setting.bcast_sta_id;
2784
2785         default:
2786                 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2787                 return priv->hw_setting.bcast_sta_id;
2788         }
2789 }
2790
2791 /*
2792  * start REPLY_TX command process
2793  */
2794 static int iwl_tx_skb(struct iwl_priv *priv,
2795                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2796 {
2797         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2798         struct iwl_tfd_frame *tfd;
2799         u32 *control_flags;
2800         int txq_id = ctl->queue;
2801         struct iwl_tx_queue *txq = NULL;
2802         struct iwl_queue *q = NULL;
2803         dma_addr_t phys_addr;
2804         dma_addr_t txcmd_phys;
2805         struct iwl_cmd *out_cmd = NULL;
2806         u16 len, idx, len_org;
2807         u8 id, hdr_len, unicast;
2808         u8 sta_id;
2809         u16 seq_number = 0;
2810         u16 fc;
2811         __le16 *qc;
2812         u8 wait_write_ptr = 0;
2813         unsigned long flags;
2814         int rc;
2815
2816         spin_lock_irqsave(&priv->lock, flags);
2817         if (iwl_is_rfkill(priv)) {
2818                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2819                 goto drop_unlock;
2820         }
2821
2822         if (!priv->interface_id) {
2823                 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2824                 goto drop_unlock;
2825         }
2826
2827         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2828                 IWL_ERROR("ERROR: No TX rate available.\n");
2829                 goto drop_unlock;
2830         }
2831
2832         unicast = !is_multicast_ether_addr(hdr->addr1);
2833         id = 0;
2834
2835         fc = le16_to_cpu(hdr->frame_control);
2836
2837 #ifdef CONFIG_IWLWIFI_DEBUG
2838         if (ieee80211_is_auth(fc))
2839                 IWL_DEBUG_TX("Sending AUTH frame\n");
2840         else if (ieee80211_is_assoc_request(fc))
2841                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2842         else if (ieee80211_is_reassoc_request(fc))
2843                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2844 #endif
2845
2846         if (!iwl_is_associated(priv) &&
2847             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2848                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2849                 goto drop_unlock;
2850         }
2851
2852         spin_unlock_irqrestore(&priv->lock, flags);
2853
2854         hdr_len = ieee80211_get_hdrlen(fc);
2855         sta_id = iwl_get_sta_id(priv, hdr);
2856         if (sta_id == IWL_INVALID_STATION) {
2857                 DECLARE_MAC_BUF(mac);
2858
2859                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2860                                print_mac(mac, hdr->addr1));
2861                 goto drop;
2862         }
2863
2864         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2865
2866         qc = ieee80211_get_qos_ctrl(hdr);
2867         if (qc) {
2868                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2869                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2870                                 IEEE80211_SCTL_SEQ;
2871                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2872                         (hdr->seq_ctrl &
2873                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2874                 seq_number += 0x10;
2875 #ifdef CONFIG_IWLWIFI_HT
2876 #ifdef CONFIG_IWLWIFI_HT_AGG
2877                 /* aggregation is on for this <sta,tid> */
2878                 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2879                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2880 #endif /* CONFIG_IWLWIFI_HT_AGG */
2881 #endif /* CONFIG_IWLWIFI_HT */
2882         }
2883         txq = &priv->txq[txq_id];
2884         q = &txq->q;
2885
2886         spin_lock_irqsave(&priv->lock, flags);
2887
2888         tfd = &txq->bd[q->first_empty];
2889         memset(tfd, 0, sizeof(*tfd));
2890         control_flags = (u32 *) tfd;
2891         idx = get_cmd_index(q, q->first_empty, 0);
2892
2893         memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2894         txq->txb[q->first_empty].skb[0] = skb;
2895         memcpy(&(txq->txb[q->first_empty].status.control),
2896                ctl, sizeof(struct ieee80211_tx_control));
2897         out_cmd = &txq->cmd[idx];
2898         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2899         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2900         out_cmd->hdr.cmd = REPLY_TX;
2901         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2902                                 INDEX_TO_SEQ(q->first_empty)));
2903         /* copy frags header */
2904         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2905
2906         /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2907         len = priv->hw_setting.tx_cmd_len +
2908                 sizeof(struct iwl_cmd_header) + hdr_len;
2909
2910         len_org = len;
2911         len = (len + 3) & ~3;
2912
2913         if (len_org != len)
2914                 len_org = 1;
2915         else
2916                 len_org = 0;
2917
2918         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2919                      offsetof(struct iwl_cmd, hdr);
2920
2921         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2922
2923         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2924                 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2925
2926         /* 802.11 null functions have no payload... */
2927         len = skb->len - hdr_len;
2928         if (len) {
2929                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2930                                            len, PCI_DMA_TODEVICE);
2931                 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2932         }
2933
2934         if (len_org)
2935                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2936
2937         len = (u16)skb->len;
2938         out_cmd->cmd.tx.len = cpu_to_le16(len);
2939
2940         /* TODO need this for burst mode later on */
2941         iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2942
2943         /* set is_hcca to 0; it probably will never be implemented */
2944         iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2945
2946         iwl4965_tx_cmd(priv, out_cmd, sta_id, txcmd_phys,
2947                        hdr, hdr_len, ctl, NULL);
2948
2949         if (!ieee80211_get_morefrag(hdr)) {
2950                 txq->need_update = 1;
2951                 if (qc) {
2952                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2953                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2954                 }
2955         } else {
2956                 wait_write_ptr = 1;
2957                 txq->need_update = 0;
2958         }
2959
2960         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2961                            sizeof(out_cmd->cmd.tx));
2962
2963         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2964                            ieee80211_get_hdrlen(fc));
2965
2966         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2967
2968         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2969         rc = iwl_tx_queue_update_write_ptr(priv, txq);
2970         spin_unlock_irqrestore(&priv->lock, flags);
2971
2972         if (rc)
2973                 return rc;
2974
2975         if ((iwl_queue_space(q) < q->high_mark)
2976             && priv->mac80211_registered) {
2977                 if (wait_write_ptr) {
2978                         spin_lock_irqsave(&priv->lock, flags);
2979                         txq->need_update = 1;
2980                         iwl_tx_queue_update_write_ptr(priv, txq);
2981                         spin_unlock_irqrestore(&priv->lock, flags);
2982                 }
2983
2984                 ieee80211_stop_queue(priv->hw, ctl->queue);
2985         }
2986
2987         return 0;
2988
2989 drop_unlock:
2990         spin_unlock_irqrestore(&priv->lock, flags);
2991 drop:
2992         return -1;
2993 }
2994
2995 static void iwl_set_rate(struct iwl_priv *priv)
2996 {
2997         const struct ieee80211_hw_mode *hw = NULL;
2998         struct ieee80211_rate *rate;
2999         int i;
3000
3001         hw = iwl_get_hw_mode(priv, priv->phymode);
3002
3003         priv->active_rate = 0;
3004         priv->active_rate_basic = 0;
3005
3006         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3007                        hw->mode == MODE_IEEE80211A ?
3008                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3009
3010         for (i = 0; i < hw->num_rates; i++) {
3011                 rate = &(hw->rates[i]);
3012                 if ((rate->val < IWL_RATE_COUNT) &&
3013                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3014                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3015                                        rate->val, iwl_rates[rate->val].plcp,
3016                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3017                                        "*" : "");
3018                         priv->active_rate |= (1 << rate->val);
3019                         if (rate->flags & IEEE80211_RATE_BASIC)
3020                                 priv->active_rate_basic |= (1 << rate->val);
3021                 } else
3022                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3023                                        rate->val, iwl_rates[rate->val].plcp);
3024         }
3025
3026         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3027                        priv->active_rate, priv->active_rate_basic);
3028
3029         /*
3030          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3031          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3032          * OFDM
3033          */
3034         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3035                 priv->staging_rxon.cck_basic_rates =
3036                     ((priv->active_rate_basic &
3037                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3038         else
3039                 priv->staging_rxon.cck_basic_rates =
3040                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3041
3042         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3043                 priv->staging_rxon.ofdm_basic_rates =
3044                     ((priv->active_rate_basic &
3045                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3046                       IWL_FIRST_OFDM_RATE) & 0xFF;
3047         else
3048                 priv->staging_rxon.ofdm_basic_rates =
3049                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3050 }
3051
3052 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
3053 {
3054         unsigned long flags;
3055
3056         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3057                 return;
3058
3059         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3060                           disable_radio ? "OFF" : "ON");
3061
3062         if (disable_radio) {
3063                 iwl_scan_cancel(priv);
3064                 /* FIXME: This is a workaround for AP */
3065                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3066                         spin_lock_irqsave(&priv->lock, flags);
3067                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3068                                     CSR_UCODE_SW_BIT_RFKILL);
3069                         spin_unlock_irqrestore(&priv->lock, flags);
3070                         iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3071                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3072                 }
3073                 return;
3074         }
3075
3076         spin_lock_irqsave(&priv->lock, flags);
3077         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3078
3079         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3080         spin_unlock_irqrestore(&priv->lock, flags);
3081
3082         /* wake up ucode */
3083         msleep(10);
3084
3085         spin_lock_irqsave(&priv->lock, flags);
3086         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3087         if (!iwl_grab_restricted_access(priv))
3088                 iwl_release_restricted_access(priv);
3089         spin_unlock_irqrestore(&priv->lock, flags);
3090
3091         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3092                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3093                                   "disabled by HW switch\n");
3094                 return;
3095         }
3096
3097         queue_work(priv->workqueue, &priv->restart);
3098         return;
3099 }
3100
3101 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3102                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3103 {
3104         u16 fc =
3105             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3106
3107         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3108                 return;
3109
3110         if (!(fc & IEEE80211_FCTL_PROTECTED))
3111                 return;
3112
3113         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3114         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3115         case RX_RES_STATUS_SEC_TYPE_TKIP:
3116                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3117                     RX_RES_STATUS_BAD_ICV_MIC)
3118                         stats->flag |= RX_FLAG_MMIC_ERROR;
3119         case RX_RES_STATUS_SEC_TYPE_WEP:
3120         case RX_RES_STATUS_SEC_TYPE_CCMP:
3121                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3122                     RX_RES_STATUS_DECRYPT_OK) {
3123                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3124                         stats->flag |= RX_FLAG_DECRYPTED;
3125                 }
3126                 break;
3127
3128         default:
3129                 break;
3130         }
3131 }
3132
3133 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3134                                     struct iwl_rx_mem_buffer *rxb,
3135                                     void *data, short len,
3136                                     struct ieee80211_rx_status *stats,
3137                                     u16 phy_flags)
3138 {
3139         struct iwl_rt_rx_hdr *iwl_rt;
3140
3141         /* First cache any information we need before we overwrite
3142          * the information provided in the skb from the hardware */
3143         s8 signal = stats->ssi;
3144         s8 noise = 0;
3145         int rate = stats->rate;
3146         u64 tsf = stats->mactime;
3147         __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3148
3149         /* We received data from the HW, so stop the watchdog */
3150         if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3151                 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3152                 return;
3153         }
3154
3155         /* copy the frame data to write after where the radiotap header goes */
3156         iwl_rt = (void *)rxb->skb->data;
3157         memmove(iwl_rt->payload, data, len);
3158
3159         iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3160         iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3161
3162         /* total header + data */
3163         iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3164
3165         /* Set the size of the skb to the size of the frame */
3166         skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3167
3168         /* Big bitfield of all the fields we provide in radiotap */
3169         iwl_rt->rt_hdr.it_present =
3170             cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3171                         (1 << IEEE80211_RADIOTAP_FLAGS) |
3172                         (1 << IEEE80211_RADIOTAP_RATE) |
3173                         (1 << IEEE80211_RADIOTAP_CHANNEL) |
3174                         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3175                         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3176                         (1 << IEEE80211_RADIOTAP_ANTENNA));
3177
3178         /* Zero the flags, we'll add to them as we go */
3179         iwl_rt->rt_flags = 0;
3180
3181         iwl_rt->rt_tsf = cpu_to_le64(tsf);
3182
3183         /* Convert to dBm */
3184         iwl_rt->rt_dbmsignal = signal;
3185         iwl_rt->rt_dbmnoise = noise;
3186
3187         /* Convert the channel frequency and set the flags */
3188         iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3189         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3190                 iwl_rt->rt_chbitmask =
3191                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3192         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3193                 iwl_rt->rt_chbitmask =
3194                     cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3195         else    /* 802.11g */
3196                 iwl_rt->rt_chbitmask =
3197                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3198
3199         rate = iwl_rate_index_from_plcp(rate);
3200         if (rate == -1)
3201                 iwl_rt->rt_rate = 0;
3202         else
3203                 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3204
3205         /* antenna number */
3206         iwl_rt->rt_antenna =
3207                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3208
3209         /* set the preamble flag if we have it */
3210         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3211                 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3212
3213         IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3214
3215         stats->flag |= RX_FLAG_RADIOTAP;
3216         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3217         rxb->skb = NULL;
3218 }
3219
3220
3221 #define IWL_PACKET_RETRY_TIME HZ
3222
3223 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3224 {
3225         u16 sc = le16_to_cpu(header->seq_ctrl);
3226         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3227         u16 frag = sc & IEEE80211_SCTL_FRAG;
3228         u16 *last_seq, *last_frag;
3229         unsigned long *last_time;
3230
3231         switch (priv->iw_mode) {
3232         case IEEE80211_IF_TYPE_IBSS:{
3233                 struct list_head *p;
3234                 struct iwl_ibss_seq *entry = NULL;
3235                 u8 *mac = header->addr2;
3236                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3237
3238                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3239                         entry =
3240                                 list_entry(p, struct iwl_ibss_seq, list);
3241                         if (!compare_ether_addr(entry->mac, mac))
3242                                 break;
3243                 }
3244                 if (p == &priv->ibss_mac_hash[index]) {
3245                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3246                         if (!entry) {
3247                                 IWL_ERROR
3248                                         ("Cannot malloc new mac entry\n");
3249                                 return 0;
3250                         }
3251                         memcpy(entry->mac, mac, ETH_ALEN);
3252                         entry->seq_num = seq;
3253                         entry->frag_num = frag;
3254                         entry->packet_time = jiffies;
3255                         list_add(&entry->list,
3256                                  &priv->ibss_mac_hash[index]);
3257                         return 0;
3258                 }
3259                 last_seq = &entry->seq_num;
3260                 last_frag = &entry->frag_num;
3261                 last_time = &entry->packet_time;
3262                 break;
3263         }
3264         case IEEE80211_IF_TYPE_STA:
3265                 last_seq = &priv->last_seq_num;
3266                 last_frag = &priv->last_frag_num;
3267                 last_time = &priv->last_packet_time;
3268                 break;
3269         default:
3270                 return 0;
3271         }
3272         if ((*last_seq == seq) &&
3273             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3274                 if (*last_frag == frag)
3275                         goto drop;
3276                 if (*last_frag + 1 != frag)
3277                         /* out-of-order fragment */
3278                         goto drop;
3279         } else
3280                 *last_seq = seq;
3281
3282         *last_frag = frag;
3283         *last_time = jiffies;
3284         return 0;
3285
3286  drop:
3287         return 1;
3288 }
3289
3290 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3291
3292 #include "iwl-spectrum.h"
3293
3294 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3295 #define BEACON_TIME_MASK_HIGH   0xFF000000
3296 #define TIME_UNIT               1024
3297
3298 /*
3299  * extended beacon time format
3300  * time in usec will be changed into a 32-bit value in 8:24 format
3301  * the high 1 byte is the beacon counts
3302  * the lower 3 bytes is the time in usec within one beacon interval
3303  */
3304
3305 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3306 {
3307         u32 quot;
3308         u32 rem;
3309         u32 interval = beacon_interval * 1024;
3310
3311         if (!interval || !usec)
3312                 return 0;
3313
3314         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3315         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3316
3317         return (quot << 24) + rem;
3318 }
3319
3320 /* base is usually what we get from ucode with each received frame,
3321  * the same as HW timer counter counting down
3322  */
3323
3324 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3325 {
3326         u32 base_low = base & BEACON_TIME_MASK_LOW;
3327         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3328         u32 interval = beacon_interval * TIME_UNIT;
3329         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3330             (addon & BEACON_TIME_MASK_HIGH);
3331
3332         if (base_low > addon_low)
3333                 res += base_low - addon_low;
3334         else if (base_low < addon_low) {
3335                 res += interval + base_low - addon_low;
3336                 res += (1 << 24);
3337         } else
3338                 res += (1 << 24);
3339
3340         return cpu_to_le32(res);
3341 }
3342
3343 static int iwl_get_measurement(struct iwl_priv *priv,
3344                                struct ieee80211_measurement_params *params,
3345                                u8 type)
3346 {
3347         struct iwl_spectrum_cmd spectrum;
3348         struct iwl_rx_packet *res;
3349         struct iwl_host_cmd cmd = {
3350                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3351                 .data = (void *)&spectrum,
3352                 .meta.flags = CMD_WANT_SKB,
3353         };
3354         u32 add_time = le64_to_cpu(params->start_time);
3355         int rc;
3356         int spectrum_resp_status;
3357         int duration = le16_to_cpu(params->duration);
3358
3359         if (iwl_is_associated(priv))
3360                 add_time =
3361                     iwl_usecs_to_beacons(
3362                         le64_to_cpu(params->start_time) - priv->last_tsf,
3363                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3364
3365         memset(&spectrum, 0, sizeof(spectrum));
3366
3367         spectrum.channel_count = cpu_to_le16(1);
3368         spectrum.flags =
3369             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3370         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3371         cmd.len = sizeof(spectrum);
3372         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3373
3374         if (iwl_is_associated(priv))
3375                 spectrum.start_time =
3376                     iwl_add_beacon_time(priv->last_beacon_time,
3377                                 add_time,
3378                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3379         else
3380                 spectrum.start_time = 0;
3381
3382         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3383         spectrum.channels[0].channel = params->channel;
3384         spectrum.channels[0].type = type;
3385         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3386                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3387                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3388
3389         rc = iwl_send_cmd_sync(priv, &cmd);
3390         if (rc)
3391                 return rc;
3392
3393         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3394         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3395                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3396                 rc = -EIO;
3397         }
3398
3399         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3400         switch (spectrum_resp_status) {
3401         case 0:         /* Command will be handled */
3402                 if (res->u.spectrum.id != 0xff) {
3403                         IWL_DEBUG_INFO
3404                             ("Replaced existing measurement: %d\n",
3405                              res->u.spectrum.id);
3406                         priv->measurement_status &= ~MEASUREMENT_READY;
3407                 }
3408                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3409                 rc = 0;
3410                 break;
3411
3412         case 1:         /* Command will not be handled */
3413                 rc = -EAGAIN;
3414                 break;
3415         }
3416
3417         dev_kfree_skb_any(cmd.meta.u.skb);
3418
3419         return rc;
3420 }
3421 #endif
3422
3423 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3424                                  struct iwl_tx_info *tx_sta)
3425 {
3426
3427         tx_sta->status.ack_signal = 0;
3428         tx_sta->status.excessive_retries = 0;
3429         tx_sta->status.queue_length = 0;
3430         tx_sta->status.queue_number = 0;
3431
3432         if (in_interrupt())
3433                 ieee80211_tx_status_irqsafe(priv->hw,
3434                                             tx_sta->skb[0], &(tx_sta->status));
3435         else
3436                 ieee80211_tx_status(priv->hw,
3437                                     tx_sta->skb[0], &(tx_sta->status));
3438
3439         tx_sta->skb[0] = NULL;
3440 }
3441
3442 /**
3443  * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3444  *
3445  * When FW advances 'R' index, all entries between old and
3446  * new 'R' index need to be reclaimed. As result, some free space
3447  * forms. If there is enough free space (> low mark), wake Tx queue.
3448  */
3449 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3450 {
3451         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3452         struct iwl_queue *q = &txq->q;
3453         int nfreed = 0;
3454
3455         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3456                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3457                           "is out of range [0-%d] %d %d.\n", txq_id,
3458                           index, q->n_bd, q->first_empty, q->last_used);
3459                 return 0;
3460         }
3461
3462         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3463                 q->last_used != index;
3464                 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3465                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3466                         iwl_txstatus_to_ieee(priv,
3467                                         &(txq->txb[txq->q.last_used]));
3468                         iwl_hw_txq_free_tfd(priv, txq);
3469                 } else if (nfreed > 1) {
3470                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3471                                         q->first_empty, q->last_used);
3472                         queue_work(priv->workqueue, &priv->restart);
3473                 }
3474                 nfreed++;
3475         }
3476
3477         if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3478                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3479                         priv->mac80211_registered)
3480                 ieee80211_wake_queue(priv->hw, txq_id);
3481
3482
3483         return nfreed;
3484 }
3485
3486 static int iwl_is_tx_success(u32 status)
3487 {
3488         status &= TX_STATUS_MSK;
3489         return (status == TX_STATUS_SUCCESS)
3490             || (status == TX_STATUS_DIRECT_DONE);
3491 }
3492
3493 /******************************************************************************
3494  *
3495  * Generic RX handler implementations
3496  *
3497  ******************************************************************************/
3498 #ifdef CONFIG_IWLWIFI_HT
3499 #ifdef CONFIG_IWLWIFI_HT_AGG
3500
3501 static inline int iwl_get_ra_sta_id(struct iwl_priv *priv,
3502                                     struct ieee80211_hdr *hdr)
3503 {
3504         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3505                 return IWL_AP_ID;
3506         else {
3507                 u8 *da = ieee80211_get_DA(hdr);
3508                 return iwl_hw_find_station(priv, da);
3509         }
3510 }
3511
3512 static struct ieee80211_hdr *iwl_tx_queue_get_hdr(
3513         struct iwl_priv *priv, int txq_id, int idx)
3514 {
3515         if (priv->txq[txq_id].txb[idx].skb[0])
3516                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3517                                 txb[idx].skb[0]->data;
3518         return NULL;
3519 }
3520
3521 static inline u32 iwl_get_scd_ssn(struct iwl_tx_resp *tx_resp)
3522 {
3523         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3524                                 tx_resp->frame_count);
3525         return le32_to_cpu(*scd_ssn) & MAX_SN;
3526
3527 }
3528 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3529                                       struct iwl_ht_agg *agg,
3530                                       struct iwl_tx_resp *tx_resp,
3531                                       u16 start_idx)
3532 {
3533         u32 status;
3534         __le32 *frame_status = &tx_resp->status;
3535         struct ieee80211_tx_status *tx_status = NULL;
3536         struct ieee80211_hdr *hdr = NULL;
3537         int i, sh;
3538         int txq_id, idx;
3539         u16 seq;
3540
3541         if (agg->wait_for_ba)
3542                 IWL_DEBUG_TX_REPLY("got tx repsons w/o back\n");
3543
3544         agg->frame_count = tx_resp->frame_count;
3545         agg->start_idx = start_idx;
3546         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3547         agg->bitmap0 = agg->bitmap1 = 0;
3548
3549         if (agg->frame_count == 1) {
3550                 struct iwl_tx_queue *txq ;
3551                 status = le32_to_cpu(frame_status[0]);
3552
3553                 txq_id = agg->txq_id;
3554                 txq = &priv->txq[txq_id];
3555                 /* FIXME: code repetition */
3556                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3557                                    agg->frame_count, agg->start_idx);
3558
3559                 tx_status = &(priv->txq[txq_id].txb[txq->q.last_used].status);
3560                 tx_status->retry_count = tx_resp->failure_frame;
3561                 tx_status->queue_number = status & 0xff;
3562                 tx_status->queue_length = tx_resp->bt_kill_count;
3563                 tx_status->queue_length |= tx_resp->failure_rts;
3564
3565                 tx_status->flags = iwl_is_tx_success(status)?
3566                         IEEE80211_TX_STATUS_ACK : 0;
3567                 tx_status->control.tx_rate =
3568                                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3569                 /* FIXME: code repetition end */
3570
3571                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3572                                     status & 0xff, tx_resp->failure_frame);
3573                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3574                                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3575
3576                 agg->wait_for_ba = 0;
3577         } else {
3578                 u64 bitmap = 0;
3579                 int start = agg->start_idx;
3580
3581                 for (i = 0; i < agg->frame_count; i++) {
3582                         u16 sc;
3583                         status = le32_to_cpu(frame_status[i]);
3584                         seq  = status >> 16;
3585                         idx = SEQ_TO_INDEX(seq);
3586                         txq_id = SEQ_TO_QUEUE(seq);
3587
3588                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3589                                       AGG_TX_STATE_ABORT_MSK))
3590                                 continue;
3591
3592                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3593                                            agg->frame_count, txq_id, idx);
3594
3595                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3596
3597                         sc = le16_to_cpu(hdr->seq_ctrl);
3598                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3599                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3600                                           " idx=%d, seq_idx=%d, seq=%d\n",
3601                                           idx, SEQ_TO_SN(sc),
3602                                           hdr->seq_ctrl);
3603                                 return -1;
3604                         }
3605
3606                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3607                                            i, idx, SEQ_TO_SN(sc));
3608
3609                         sh = idx - start;
3610                         if (sh > 64) {
3611                                 sh = (start - idx) + 0xff;
3612                                 bitmap = bitmap << sh;
3613                                 sh = 0;
3614                                 start = idx;
3615                         } else if (sh < -64)
3616                                 sh  = 0xff - (start - idx);
3617                         else if (sh < 0) {
3618                                 sh = start - idx;
3619                                 start = idx;
3620                                 bitmap = bitmap << sh;
3621                                 sh = 0;
3622                         }
3623                         bitmap |= (1 << sh);
3624                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3625                                            start, (u32)(bitmap & 0xFFFFFFFF));
3626                 }
3627
3628                 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3629                 agg->bitmap1 = bitmap >> 32;
3630                 agg->start_idx = start;
3631                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3632                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3633                                    agg->frame_count, agg->start_idx,
3634                                    agg->bitmap0);
3635
3636                 if (bitmap)
3637                         agg->wait_for_ba = 1;
3638         }
3639         return 0;
3640 }
3641 #endif
3642 #endif
3643
3644 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3645                             struct iwl_rx_mem_buffer *rxb)
3646 {
3647         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3648         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3649         int txq_id = SEQ_TO_QUEUE(sequence);
3650         int index = SEQ_TO_INDEX(sequence);
3651         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3652         struct ieee80211_tx_status *tx_status;
3653         struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3654         u32  status = le32_to_cpu(tx_resp->status);
3655 #ifdef CONFIG_IWLWIFI_HT
3656 #ifdef CONFIG_IWLWIFI_HT_AGG
3657         int tid, sta_id;
3658 #endif
3659 #endif
3660
3661         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3662                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3663                           "is out of range [0-%d] %d %d\n", txq_id,
3664                           index, txq->q.n_bd, txq->q.first_empty,
3665                           txq->q.last_used);
3666                 return;
3667         }
3668
3669 #ifdef CONFIG_IWLWIFI_HT
3670 #ifdef CONFIG_IWLWIFI_HT_AGG
3671         if (txq->sched_retry) {
3672                 const u32 scd_ssn = iwl_get_scd_ssn(tx_resp);
3673                 struct ieee80211_hdr *hdr =
3674                         iwl_tx_queue_get_hdr(priv, txq_id, index);
3675                 struct iwl_ht_agg *agg = NULL;
3676                 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3677
3678                 if (qc == NULL) {
3679                         IWL_ERROR("BUG_ON qc is null!!!!\n");
3680                         return;
3681                 }
3682
3683                 tid = le16_to_cpu(*qc) & 0xf;
3684
3685                 sta_id = iwl_get_ra_sta_id(priv, hdr);
3686                 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3687                         IWL_ERROR("Station not known for\n");
3688                         return;
3689                 }
3690
3691                 agg = &priv->stations[sta_id].tid[tid].agg;
3692
3693                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3694
3695                 if ((tx_resp->frame_count == 1) &&
3696                     !iwl_is_tx_success(status)) {
3697                         /* TODO: send BAR */
3698                 }
3699
3700                 if ((txq->q.last_used != (scd_ssn & 0xff))) {
3701                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3702                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3703                                            "%d index %d\n", scd_ssn , index);
3704                         iwl_tx_queue_reclaim(priv, txq_id, index);
3705                 }
3706         } else {
3707 #endif /* CONFIG_IWLWIFI_HT_AGG */
3708 #endif /* CONFIG_IWLWIFI_HT */
3709         tx_status = &(txq->txb[txq->q.last_used].status);
3710
3711         tx_status->retry_count = tx_resp->failure_frame;
3712         tx_status->queue_number = status;
3713         tx_status->queue_length = tx_resp->bt_kill_count;
3714         tx_status->queue_length |= tx_resp->failure_rts;
3715
3716         tx_status->flags =
3717             iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3718
3719         tx_status->control.tx_rate =
3720                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3721
3722         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3723                      "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3724                      status, le32_to_cpu(tx_resp->rate_n_flags),
3725                      tx_resp->failure_frame);
3726
3727         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3728         if (index != -1)
3729                 iwl_tx_queue_reclaim(priv, txq_id, index);
3730 #ifdef CONFIG_IWLWIFI_HT
3731 #ifdef CONFIG_IWLWIFI_HT_AGG
3732         }
3733 #endif /* CONFIG_IWLWIFI_HT_AGG */
3734 #endif /* CONFIG_IWLWIFI_HT */
3735
3736         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3737                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3738 }
3739
3740
3741 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3742                                struct iwl_rx_mem_buffer *rxb)
3743 {
3744         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3745         struct iwl_alive_resp *palive;
3746         struct delayed_work *pwork;
3747
3748         palive = &pkt->u.alive_frame;
3749
3750         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3751                        "0x%01X 0x%01X\n",
3752                        palive->is_valid, palive->ver_type,
3753                        palive->ver_subtype);
3754
3755         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3756                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3757                 memcpy(&priv->card_alive_init,
3758                        &pkt->u.alive_frame,
3759                        sizeof(struct iwl_init_alive_resp));
3760                 pwork = &priv->init_alive_start;
3761         } else {
3762                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3763                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3764                        sizeof(struct iwl_alive_resp));
3765                 pwork = &priv->alive_start;
3766         }
3767
3768         /* We delay the ALIVE response by 5ms to
3769          * give the HW RF Kill time to activate... */
3770         if (palive->is_valid == UCODE_VALID_OK)
3771                 queue_delayed_work(priv->workqueue, pwork,
3772                                    msecs_to_jiffies(5));
3773         else
3774                 IWL_WARNING("uCode did not respond OK.\n");
3775 }
3776
3777 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3778                                  struct iwl_rx_mem_buffer *rxb)
3779 {
3780         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3781
3782         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3783         return;
3784 }
3785
3786 static void iwl_rx_reply_error(struct iwl_priv *priv,
3787                                struct iwl_rx_mem_buffer *rxb)
3788 {
3789         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3790
3791         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3792                 "seq 0x%04X ser 0x%08X\n",
3793                 le32_to_cpu(pkt->u.err_resp.error_type),
3794                 get_cmd_string(pkt->u.err_resp.cmd_id),
3795                 pkt->u.err_resp.cmd_id,
3796                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3797                 le32_to_cpu(pkt->u.err_resp.error_info));
3798 }
3799
3800 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3801
3802 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3803 {
3804         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3805         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3806         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3807         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3808                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3809         rxon->channel = csa->channel;
3810         priv->staging_rxon.channel = csa->channel;
3811 }
3812
3813 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3814                                           struct iwl_rx_mem_buffer *rxb)
3815 {
3816 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3817         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3818         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3819
3820         if (!report->state) {
3821                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3822                           "Spectrum Measure Notification: Start\n");
3823                 return;
3824         }
3825
3826         memcpy(&priv->measure_report, report, sizeof(*report));
3827         priv->measurement_status |= MEASUREMENT_READY;
3828 #endif
3829 }
3830
3831 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3832                                   struct iwl_rx_mem_buffer *rxb)
3833 {
3834 #ifdef CONFIG_IWLWIFI_DEBUG
3835         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3836         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3837         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3838                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3839 #endif
3840 }
3841
3842 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3843                                              struct iwl_rx_mem_buffer *rxb)
3844 {
3845         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3846         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3847                         "notification for %s:\n",
3848                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3849         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3850 }
3851
3852 static void iwl_bg_beacon_update(struct work_struct *work)
3853 {
3854         struct iwl_priv *priv =
3855                 container_of(work, struct iwl_priv, beacon_update);
3856         struct sk_buff *beacon;
3857
3858         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3859         beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3860
3861         if (!beacon) {
3862                 IWL_ERROR("update beacon failed\n");
3863                 return;
3864         }
3865
3866         mutex_lock(&priv->mutex);
3867         /* new beacon skb is allocated every time; dispose previous.*/
3868         if (priv->ibss_beacon)
3869                 dev_kfree_skb(priv->ibss_beacon);
3870
3871         priv->ibss_beacon = beacon;
3872         mutex_unlock(&priv->mutex);
3873
3874         iwl_send_beacon_cmd(priv);
3875 }
3876
3877 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3878                                 struct iwl_rx_mem_buffer *rxb)
3879 {
3880 #ifdef CONFIG_IWLWIFI_DEBUG
3881         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3882         struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3883         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3884
3885         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3886                 "tsf %d %d rate %d\n",
3887                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3888                 beacon->beacon_notify_hdr.failure_frame,
3889                 le32_to_cpu(beacon->ibss_mgr_status),
3890                 le32_to_cpu(beacon->high_tsf),
3891                 le32_to_cpu(beacon->low_tsf), rate);
3892 #endif
3893
3894         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3895             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3896                 queue_work(priv->workqueue, &priv->beacon_update);
3897 }
3898
3899 /* Service response to REPLY_SCAN_CMD (0x80) */
3900 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3901                               struct iwl_rx_mem_buffer *rxb)
3902 {
3903 #ifdef CONFIG_IWLWIFI_DEBUG
3904         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3905         struct iwl_scanreq_notification *notif =
3906             (struct iwl_scanreq_notification *)pkt->u.raw;
3907
3908         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3909 #endif
3910 }
3911
3912 /* Service SCAN_START_NOTIFICATION (0x82) */
3913 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3914                                     struct iwl_rx_mem_buffer *rxb)
3915 {
3916         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3917         struct iwl_scanstart_notification *notif =
3918             (struct iwl_scanstart_notification *)pkt->u.raw;
3919         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3920         IWL_DEBUG_SCAN("Scan start: "
3921                        "%d [802.11%s] "
3922                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3923                        notif->channel,
3924                        notif->band ? "bg" : "a",
3925                        notif->tsf_high,
3926                        notif->tsf_low, notif->status, notif->beacon_timer);
3927 }
3928
3929 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3930 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3931                                       struct iwl_rx_mem_buffer *rxb)
3932 {
3933         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3934         struct iwl_scanresults_notification *notif =
3935             (struct iwl_scanresults_notification *)pkt->u.raw;
3936
3937         IWL_DEBUG_SCAN("Scan ch.res: "
3938                        "%d [802.11%s] "
3939                        "(TSF: 0x%08X:%08X) - %d "
3940                        "elapsed=%lu usec (%dms since last)\n",
3941                        notif->channel,
3942                        notif->band ? "bg" : "a",
3943                        le32_to_cpu(notif->tsf_high),
3944                        le32_to_cpu(notif->tsf_low),
3945                        le32_to_cpu(notif->statistics[0]),
3946                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3947                        jiffies_to_msecs(elapsed_jiffies
3948                                         (priv->last_scan_jiffies, jiffies)));
3949
3950         priv->last_scan_jiffies = jiffies;
3951 }
3952
3953 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3954 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3955                                        struct iwl_rx_mem_buffer *rxb)
3956 {
3957         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3958         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3959
3960         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3961                        scan_notif->scanned_channels,
3962                        scan_notif->tsf_low,
3963                        scan_notif->tsf_high, scan_notif->status);
3964
3965         /* The HW is no longer scanning */
3966         clear_bit(STATUS_SCAN_HW, &priv->status);
3967
3968         /* The scan completion notification came in, so kill that timer... */
3969         cancel_delayed_work(&priv->scan_check);
3970
3971         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3972                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3973                        jiffies_to_msecs(elapsed_jiffies
3974                                         (priv->scan_pass_start, jiffies)));
3975
3976         /* Remove this scanned band from the list
3977          * of pending bands to scan */
3978         priv->scan_bands--;
3979
3980         /* If a request to abort was given, or the scan did not succeed
3981          * then we reset the scan state machine and terminate,
3982          * re-queuing another scan if one has been requested */
3983         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3984                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3985                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3986         } else {
3987                 /* If there are more bands on this scan pass reschedule */
3988                 if (priv->scan_bands > 0)
3989                         goto reschedule;
3990         }
3991
3992         priv->last_scan_jiffies = jiffies;
3993         IWL_DEBUG_INFO("Setting scan to off\n");
3994
3995         clear_bit(STATUS_SCANNING, &priv->status);
3996
3997         IWL_DEBUG_INFO("Scan took %dms\n",
3998                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3999
4000         queue_work(priv->workqueue, &priv->scan_completed);
4001
4002         return;
4003
4004 reschedule:
4005         priv->scan_pass_start = jiffies;
4006         queue_work(priv->workqueue, &priv->request_scan);
4007 }
4008
4009 /* Handle notification from uCode that card's power state is changing
4010  * due to software, hardware, or critical temperature RFKILL */
4011 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
4012                                     struct iwl_rx_mem_buffer *rxb)
4013 {
4014         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4015         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4016         unsigned long status = priv->status;
4017
4018         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4019                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4020                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4021
4022         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4023                      RF_CARD_DISABLED)) {
4024
4025                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4026                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4027
4028                 if (!iwl_grab_restricted_access(priv)) {
4029                         iwl_write_restricted(
4030                                 priv, HBUS_TARG_MBX_C,
4031                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4032
4033                         iwl_release_restricted_access(priv);
4034                 }
4035
4036                 if (!(flags & RXON_CARD_DISABLED)) {
4037                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4038                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4039                         if (!iwl_grab_restricted_access(priv)) {
4040                                 iwl_write_restricted(
4041                                         priv, HBUS_TARG_MBX_C,
4042                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4043
4044                                 iwl_release_restricted_access(priv);
4045                         }
4046                 }
4047
4048                 if (flags & RF_CARD_DISABLED) {
4049                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4050                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4051                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
4052                         if (!iwl_grab_restricted_access(priv))
4053                                 iwl_release_restricted_access(priv);
4054                 }
4055         }
4056
4057         if (flags & HW_CARD_DISABLED)
4058                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4059         else
4060                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4061
4062
4063         if (flags & SW_CARD_DISABLED)
4064                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4065         else
4066                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4067
4068         if (!(flags & RXON_CARD_DISABLED))
4069                 iwl_scan_cancel(priv);
4070
4071         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4072              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4073             (test_bit(STATUS_RF_KILL_SW, &status) !=
4074              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4075                 queue_work(priv->workqueue, &priv->rf_kill);
4076         else
4077                 wake_up_interruptible(&priv->wait_command_queue);
4078 }
4079
4080 /**
4081  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
4082  *
4083  * Setup the RX handlers for each of the reply types sent from the uCode
4084  * to the host.
4085  *
4086  * This function chains into the hardware specific files for them to setup
4087  * any hardware specific handlers as well.
4088  */
4089 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
4090 {
4091         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
4092         priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
4093         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
4094         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
4095         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4096             iwl_rx_spectrum_measure_notif;
4097         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
4098         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4099             iwl_rx_pm_debug_statistics_notif;
4100         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
4101
4102         /* NOTE:  iwl_rx_statistics is different based on whether
4103          * the build is for the 3945 or the 4965.  See the
4104          * corresponding implementation in iwl-XXXX.c
4105          *
4106          * The same handler is used for both the REPLY to a
4107          * discrete statistics request from the host as well as
4108          * for the periodic statistics notification from the uCode
4109          */
4110         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
4111         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
4112
4113         priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
4114         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
4115         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4116             iwl_rx_scan_results_notif;
4117         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4118             iwl_rx_scan_complete_notif;
4119         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
4120         priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
4121
4122         /* Setup hardware specific Rx handlers */
4123         iwl_hw_rx_handler_setup(priv);
4124 }
4125
4126 /**
4127  * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4128  * @rxb: Rx buffer to reclaim
4129  *
4130  * If an Rx buffer has an async callback associated with it the callback
4131  * will be executed.  The attached skb (if present) will only be freed
4132  * if the callback returns 1
4133  */
4134 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
4135                                 struct iwl_rx_mem_buffer *rxb)
4136 {
4137         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
4138         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4139         int txq_id = SEQ_TO_QUEUE(sequence);
4140         int index = SEQ_TO_INDEX(sequence);
4141         int huge = sequence & SEQ_HUGE_FRAME;
4142         int cmd_index;
4143         struct iwl_cmd *cmd;
4144
4145         /* If a Tx command is being handled and it isn't in the actual
4146          * command queue then there a command routing bug has been introduced
4147          * in the queue management code. */
4148         if (txq_id != IWL_CMD_QUEUE_NUM)
4149                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4150                           txq_id, pkt->hdr.cmd);
4151         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4152
4153         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4154         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4155
4156         /* Input error checking is done when commands are added to queue. */
4157         if (cmd->meta.flags & CMD_WANT_SKB) {
4158                 cmd->meta.source->u.skb = rxb->skb;
4159                 rxb->skb = NULL;
4160         } else if (cmd->meta.u.callback &&
4161                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4162                 rxb->skb = NULL;
4163
4164         iwl_tx_queue_reclaim(priv, txq_id, index);
4165
4166         if (!(cmd->meta.flags & CMD_ASYNC)) {
4167                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4168                 wake_up_interruptible(&priv->wait_command_queue);
4169         }
4170 }
4171
4172 /************************** RX-FUNCTIONS ****************************/
4173 /*
4174  * Rx theory of operation
4175  *
4176  * The host allocates 32 DMA target addresses and passes the host address
4177  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
4178  * 0 to 31
4179  *
4180  * Rx Queue Indexes
4181  * The host/firmware share two index registers for managing the Rx buffers.
4182  *
4183  * The READ index maps to the first position that the firmware may be writing
4184  * to -- the driver can read up to (but not including) this position and get
4185  * good data.
4186  * The READ index is managed by the firmware once the card is enabled.
4187  *
4188  * The WRITE index maps to the last position the driver has read from -- the
4189  * position preceding WRITE is the last slot the firmware can place a packet.
4190  *
4191  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4192  * WRITE = READ.
4193  *
4194  * During initialization the host sets up the READ queue position to the first
4195  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4196  *
4197  * When the firmware places a packet in a buffer it will advance the READ index
4198  * and fire the RX interrupt.  The driver can then query the READ index and
4199  * process as many packets as possible, moving the WRITE index forward as it
4200  * resets the Rx queue buffers with new memory.
4201  *
4202  * The management in the driver is as follows:
4203  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4204  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4205  *   to replensish the iwl->rxq->rx_free.
4206  * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
4207  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4208  *   'processed' and 'read' driver indexes as well)
4209  * + A received packet is processed and handed to the kernel network stack,
4210  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4211  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4212  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4213  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4214  *   were enough free buffers and RX_STALLED is set it is cleared.
4215  *
4216  *
4217  * Driver sequence:
4218  *
4219  * iwl_rx_queue_alloc()       Allocates rx_free
4220  * iwl_rx_replenish()         Replenishes rx_free list from rx_used, and calls
4221  *                            iwl_rx_queue_restock
4222  * iwl_rx_queue_restock()     Moves available buffers from rx_free into Rx
4223  *                            queue, updates firmware pointers, and updates
4224  *                            the WRITE index.  If insufficient rx_free buffers
4225  *                            are available, schedules iwl_rx_replenish
4226  *
4227  * -- enable interrupts --
4228  * ISR - iwl_rx()             Detach iwl_rx_mem_buffers from pool up to the
4229  *                            READ INDEX, detaching the SKB from the pool.
4230  *                            Moves the packet buffer from queue to rx_used.
4231  *                            Calls iwl_rx_queue_restock to refill any empty
4232  *                            slots.
4233  * ...
4234  *
4235  */
4236
4237 /**
4238  * iwl_rx_queue_space - Return number of free slots available in queue.
4239  */
4240 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
4241 {
4242         int s = q->read - q->write;
4243         if (s <= 0)
4244                 s += RX_QUEUE_SIZE;
4245         /* keep some buffer to not confuse full and empty queue */
4246         s -= 2;
4247         if (s < 0)
4248                 s = 0;
4249         return s;
4250 }
4251
4252 /**
4253  * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4254  *
4255  * NOTE: This function has 3945 and 4965 specific code sections
4256  * but is declared in base due to the majority of the
4257  * implementation being the same (only a numeric constant is
4258  * different)
4259  *
4260  */
4261 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
4262 {
4263         u32 reg = 0;
4264         int rc = 0;
4265         unsigned long flags;
4266
4267         spin_lock_irqsave(&q->lock, flags);
4268
4269         if (q->need_update == 0)
4270                 goto exit_unlock;
4271
4272         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4273                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4274
4275                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4276                         iwl_set_bit(priv, CSR_GP_CNTRL,
4277                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4278                         goto exit_unlock;
4279                 }
4280
4281                 rc = iwl_grab_restricted_access(priv);
4282                 if (rc)
4283                         goto exit_unlock;
4284
4285                 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
4286                                      q->write & ~0x7);
4287                 iwl_release_restricted_access(priv);
4288         } else
4289                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4290
4291
4292         q->need_update = 0;
4293
4294  exit_unlock:
4295         spin_unlock_irqrestore(&q->lock, flags);
4296         return rc;
4297 }
4298
4299 /**
4300  * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
4301  *
4302  * NOTE: This function has 3945 and 4965 specific code paths in it.
4303  */
4304 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
4305                                           dma_addr_t dma_addr)
4306 {
4307         return cpu_to_le32((u32)(dma_addr >> 8));
4308 }
4309
4310
4311 /**
4312  * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4313  *
4314  * If there are slots in the RX queue that  need to be restocked,
4315  * and we have free pre-allocated buffers, fill the ranks as much
4316  * as we can pulling from rx_free.
4317  *
4318  * This moves the 'write' index forward to catch up with 'processed', and
4319  * also updates the memory address in the firmware to reference the new
4320  * target buffer.
4321  */
4322 int iwl_rx_queue_restock(struct iwl_priv *priv)
4323 {
4324         struct iwl_rx_queue *rxq = &priv->rxq;
4325         struct list_head *element;
4326         struct iwl_rx_mem_buffer *rxb;
4327         unsigned long flags;
4328         int write, rc;
4329
4330         spin_lock_irqsave(&rxq->lock, flags);
4331         write = rxq->write & ~0x7;
4332         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4333                 element = rxq->rx_free.next;
4334                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4335                 list_del(element);
4336                 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4337                 rxq->queue[rxq->write] = rxb;
4338                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4339                 rxq->free_count--;
4340         }
4341         spin_unlock_irqrestore(&rxq->lock, flags);
4342         /* If the pre-allocated buffer pool is dropping low, schedule to
4343          * refill it */
4344         if (rxq->free_count <= RX_LOW_WATERMARK)
4345                 queue_work(priv->workqueue, &priv->rx_replenish);
4346
4347
4348         /* If we've added more space for the firmware to place data, tell it */
4349         if ((write != (rxq->write & ~0x7))
4350             || (abs(rxq->write - rxq->read) > 7)) {
4351                 spin_lock_irqsave(&rxq->lock, flags);
4352                 rxq->need_update = 1;
4353                 spin_unlock_irqrestore(&rxq->lock, flags);
4354                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4355                 if (rc)
4356                         return rc;
4357         }
4358
4359         return 0;
4360 }
4361
4362 /**
4363  * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4364  *
4365  * When moving to rx_free an SKB is allocated for the slot.
4366  *
4367  * Also restock the Rx queue via iwl_rx_queue_restock.
4368  * This is called as a scheduled work item (except for during intialization)
4369  */
4370 void iwl_rx_replenish(void *data)
4371 {
4372         struct iwl_priv *priv = data;
4373         struct iwl_rx_queue *rxq = &priv->rxq;
4374         struct list_head *element;
4375         struct iwl_rx_mem_buffer *rxb;
4376         unsigned long flags;
4377         spin_lock_irqsave(&rxq->lock, flags);
4378         while (!list_empty(&rxq->rx_used)) {
4379                 element = rxq->rx_used.next;
4380                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4381                 rxb->skb =
4382                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4383                 if (!rxb->skb) {
4384                         if (net_ratelimit())
4385                                 printk(KERN_CRIT DRV_NAME
4386                                        ": Can not allocate SKB buffers\n");
4387                         /* We don't reschedule replenish work here -- we will
4388                          * call the restock method and if it still needs
4389                          * more buffers it will schedule replenish */
4390                         break;
4391                 }
4392                 priv->alloc_rxb_skb++;
4393                 list_del(element);
4394                 rxb->dma_addr =
4395                     pci_map_single(priv->pci_dev, rxb->skb->data,
4396                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4397                 list_add_tail(&rxb->list, &rxq->rx_free);
4398                 rxq->free_count++;
4399         }
4400         spin_unlock_irqrestore(&rxq->lock, flags);
4401
4402         spin_lock_irqsave(&priv->lock, flags);
4403         iwl_rx_queue_restock(priv);
4404         spin_unlock_irqrestore(&priv->lock, flags);
4405 }
4406
4407 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4408  * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4409  * This free routine walks the list of POOL entries and if SKB is set to
4410  * non NULL it is unmapped and freed
4411  */
4412 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4413 {
4414         int i;
4415         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4416                 if (rxq->pool[i].skb != NULL) {
4417                         pci_unmap_single(priv->pci_dev,
4418                                          rxq->pool[i].dma_addr,
4419                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4420                         dev_kfree_skb(rxq->pool[i].skb);
4421                 }
4422         }
4423
4424         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4425                             rxq->dma_addr);
4426         rxq->bd = NULL;
4427 }
4428
4429 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4430 {
4431         struct iwl_rx_queue *rxq = &priv->rxq;
4432         struct pci_dev *dev = priv->pci_dev;
4433         int i;
4434
4435         spin_lock_init(&rxq->lock);
4436         INIT_LIST_HEAD(&rxq->rx_free);
4437         INIT_LIST_HEAD(&rxq->rx_used);
4438         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4439         if (!rxq->bd)
4440                 return -ENOMEM;
4441         /* Fill the rx_used queue with _all_ of the Rx buffers */
4442         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4443                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4444         /* Set us so that we have processed and used all buffers, but have
4445          * not restocked the Rx queue with fresh buffers */
4446         rxq->read = rxq->write = 0;
4447         rxq->free_count = 0;
4448         rxq->need_update = 0;
4449         return 0;
4450 }
4451
4452 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4453 {
4454         unsigned long flags;
4455         int i;
4456         spin_lock_irqsave(&rxq->lock, flags);
4457         INIT_LIST_HEAD(&rxq->rx_free);
4458         INIT_LIST_HEAD(&rxq->rx_used);
4459         /* Fill the rx_used queue with _all_ of the Rx buffers */
4460         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4461                 /* In the reset function, these buffers may have been allocated
4462                  * to an SKB, so we need to unmap and free potential storage */
4463                 if (rxq->pool[i].skb != NULL) {
4464                         pci_unmap_single(priv->pci_dev,
4465                                          rxq->pool[i].dma_addr,
4466                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4467                         priv->alloc_rxb_skb--;
4468                         dev_kfree_skb(rxq->pool[i].skb);
4469                         rxq->pool[i].skb = NULL;
4470                 }
4471                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4472         }
4473
4474         /* Set us so that we have processed and used all buffers, but have
4475          * not restocked the Rx queue with fresh buffers */
4476         rxq->read = rxq->write = 0;
4477         rxq->free_count = 0;
4478         spin_unlock_irqrestore(&rxq->lock, flags);
4479 }
4480
4481 /* Convert linear signal-to-noise ratio into dB */
4482 static u8 ratio2dB[100] = {
4483 /*       0   1   2   3   4   5   6   7   8   9 */
4484          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4485         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4486         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4487         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4488         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4489         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4490         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4491         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4492         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4493         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4494 };
4495
4496 /* Calculates a relative dB value from a ratio of linear
4497  *   (i.e. not dB) signal levels.
4498  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4499 int iwl_calc_db_from_ratio(int sig_ratio)
4500 {
4501         /* Anything above 1000:1 just report as 60 dB */
4502         if (sig_ratio > 1000)
4503                 return 60;
4504
4505         /* Above 100:1, divide by 10 and use table,
4506          *   add 20 dB to make up for divide by 10 */
4507         if (sig_ratio > 100)
4508                 return (20 + (int)ratio2dB[sig_ratio/10]);
4509
4510         /* We shouldn't see this */
4511         if (sig_ratio < 1)
4512                 return 0;
4513
4514         /* Use table for ratios 1:1 - 99:1 */
4515         return (int)ratio2dB[sig_ratio];
4516 }
4517
4518 #define PERFECT_RSSI (-20) /* dBm */
4519 #define WORST_RSSI (-95)   /* dBm */
4520 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4521
4522 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4523  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4524  *   about formulas used below. */
4525 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4526 {
4527         int sig_qual;
4528         int degradation = PERFECT_RSSI - rssi_dbm;
4529
4530         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4531          * as indicator; formula is (signal dbm - noise dbm).
4532          * SNR at or above 40 is a great signal (100%).
4533          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4534          * Weakest usable signal is usually 10 - 15 dB SNR. */
4535         if (noise_dbm) {
4536                 if (rssi_dbm - noise_dbm >= 40)
4537                         return 100;
4538                 else if (rssi_dbm < noise_dbm)
4539                         return 0;
4540                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4541
4542         /* Else use just the signal level.
4543          * This formula is a least squares fit of data points collected and
4544          *   compared with a reference system that had a percentage (%) display
4545          *   for signal quality. */
4546         } else
4547                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4548                             (15 * RSSI_RANGE + 62 * degradation)) /
4549                            (RSSI_RANGE * RSSI_RANGE);
4550
4551         if (sig_qual > 100)
4552                 sig_qual = 100;
4553         else if (sig_qual < 1)
4554                 sig_qual = 0;
4555
4556         return sig_qual;
4557 }
4558
4559 /**
4560  * iwl_rx_handle - Main entry function for receiving responses from the uCode
4561  *
4562  * Uses the priv->rx_handlers callback function array to invoke
4563  * the appropriate handlers, including command responses,
4564  * frame-received notifications, and other notifications.
4565  */
4566 static void iwl_rx_handle(struct iwl_priv *priv)
4567 {
4568         struct iwl_rx_mem_buffer *rxb;
4569         struct iwl_rx_packet *pkt;
4570         struct iwl_rx_queue *rxq = &priv->rxq;
4571         u32 r, i;
4572         int reclaim;
4573         unsigned long flags;
4574
4575         r = iwl_hw_get_rx_read(priv);
4576         i = rxq->read;
4577
4578         /* Rx interrupt, but nothing sent from uCode */
4579         if (i == r)
4580                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4581
4582         while (i != r) {
4583                 rxb = rxq->queue[i];
4584
4585                 /* If an RXB doesn't have a queue slot associated with it
4586                  * then a bug has been introduced in the queue refilling
4587                  * routines -- catch it here */
4588                 BUG_ON(rxb == NULL);
4589
4590                 rxq->queue[i] = NULL;
4591
4592                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4593                                             IWL_RX_BUF_SIZE,
4594                                             PCI_DMA_FROMDEVICE);
4595                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4596
4597                 /* Reclaim a command buffer only if this packet is a response
4598                  *   to a (driver-originated) command.
4599                  * If the packet (e.g. Rx frame) originated from uCode,
4600                  *   there is no command buffer to reclaim.
4601                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4602                  *   but apparently a few don't get set; catch them here. */
4603                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4604                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4605                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4606                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4607                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4608                         (pkt->hdr.cmd != REPLY_TX);
4609
4610                 /* Based on type of command response or notification,
4611                  *   handle those that need handling via function in
4612                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
4613                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4614                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4615                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4616                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4617                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4618                 } else {
4619                         /* No handling needed */
4620                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4621                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4622                                 r, i, get_cmd_string(pkt->hdr.cmd),
4623                                 pkt->hdr.cmd);
4624                 }
4625
4626                 if (reclaim) {
4627                         /* Invoke any callbacks, transfer the skb to caller,
4628                          * and fire off the (possibly) blocking iwl_send_cmd()
4629                          * as we reclaim the driver command queue */
4630                         if (rxb && rxb->skb)
4631                                 iwl_tx_cmd_complete(priv, rxb);
4632                         else
4633                                 IWL_WARNING("Claim null rxb?\n");
4634                 }
4635
4636                 /* For now we just don't re-use anything.  We can tweak this
4637                  * later to try and re-use notification packets and SKBs that
4638                  * fail to Rx correctly */
4639                 if (rxb->skb != NULL) {
4640                         priv->alloc_rxb_skb--;
4641                         dev_kfree_skb_any(rxb->skb);
4642                         rxb->skb = NULL;
4643                 }
4644
4645                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4646                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4647                 spin_lock_irqsave(&rxq->lock, flags);
4648                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4649                 spin_unlock_irqrestore(&rxq->lock, flags);
4650                 i = (i + 1) & RX_QUEUE_MASK;
4651         }
4652
4653         /* Backtrack one entry */
4654         priv->rxq.read = i;
4655         iwl_rx_queue_restock(priv);
4656 }
4657
4658 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4659                                   struct iwl_tx_queue *txq)
4660 {
4661         u32 reg = 0;
4662         int rc = 0;
4663         int txq_id = txq->q.id;
4664
4665         if (txq->need_update == 0)
4666                 return rc;
4667
4668         /* if we're trying to save power */
4669         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4670                 /* wake up nic if it's powered down ...
4671                  * uCode will wake up, and interrupt us again, so next
4672                  * time we'll skip this part. */
4673                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4674
4675                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4676                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4677                         iwl_set_bit(priv, CSR_GP_CNTRL,
4678                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4679                         return rc;
4680                 }
4681
4682                 /* restore this queue's parameters in nic hardware. */
4683                 rc = iwl_grab_restricted_access(priv);
4684                 if (rc)
4685                         return rc;
4686                 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4687                                      txq->q.first_empty | (txq_id << 8));
4688                 iwl_release_restricted_access(priv);
4689
4690         /* else not in power-save mode, uCode will never sleep when we're
4691          * trying to tx (during RFKILL, we're not trying to tx). */
4692         } else
4693                 iwl_write32(priv, HBUS_TARG_WRPTR,
4694                             txq->q.first_empty | (txq_id << 8));
4695
4696         txq->need_update = 0;
4697
4698         return rc;
4699 }
4700
4701 #ifdef CONFIG_IWLWIFI_DEBUG
4702 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4703 {
4704         DECLARE_MAC_BUF(mac);
4705
4706         IWL_DEBUG_RADIO("RX CONFIG:\n");
4707         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4708         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4709         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4710         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4711                         le32_to_cpu(rxon->filter_flags));
4712         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4713         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4714                         rxon->ofdm_basic_rates);
4715         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4716         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4717                         print_mac(mac, rxon->node_addr));
4718         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4719                         print_mac(mac, rxon->bssid_addr));
4720         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4721 }
4722 #endif
4723
4724 static void iwl_enable_interrupts(struct iwl_priv *priv)
4725 {
4726         IWL_DEBUG_ISR("Enabling interrupts\n");
4727         set_bit(STATUS_INT_ENABLED, &priv->status);
4728         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4729 }
4730
4731 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4732 {
4733         clear_bit(STATUS_INT_ENABLED, &priv->status);
4734
4735         /* disable interrupts from uCode/NIC to host */
4736         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4737
4738         /* acknowledge/clear/reset any interrupts still pending
4739          * from uCode or flow handler (Rx/Tx DMA) */
4740         iwl_write32(priv, CSR_INT, 0xffffffff);
4741         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4742         IWL_DEBUG_ISR("Disabled interrupts\n");
4743 }
4744
4745 static const char *desc_lookup(int i)
4746 {
4747         switch (i) {
4748         case 1:
4749                 return "FAIL";
4750         case 2:
4751                 return "BAD_PARAM";
4752         case 3:
4753                 return "BAD_CHECKSUM";
4754         case 4:
4755                 return "NMI_INTERRUPT";
4756         case 5:
4757                 return "SYSASSERT";
4758         case 6:
4759                 return "FATAL_ERROR";
4760         }
4761
4762         return "UNKNOWN";
4763 }
4764
4765 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4766 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4767
4768 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4769 {
4770         u32 data2, line;
4771         u32 desc, time, count, base, data1;
4772         u32 blink1, blink2, ilink1, ilink2;
4773         int rc;
4774
4775         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4776
4777         if (!iwl_hw_valid_rtc_data_addr(base)) {
4778                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4779                 return;
4780         }
4781
4782         rc = iwl_grab_restricted_access(priv);
4783         if (rc) {
4784                 IWL_WARNING("Can not read from adapter at this time.\n");
4785                 return;
4786         }
4787
4788         count = iwl_read_restricted_mem(priv, base);
4789
4790         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4791                 IWL_ERROR("Start IWL Error Log Dump:\n");
4792                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4793                           priv->status, priv->config, count);
4794         }
4795
4796         desc = iwl_read_restricted_mem(priv, base + 1 * sizeof(u32));
4797         blink1 = iwl_read_restricted_mem(priv, base + 3 * sizeof(u32));
4798         blink2 = iwl_read_restricted_mem(priv, base + 4 * sizeof(u32));
4799         ilink1 = iwl_read_restricted_mem(priv, base + 5 * sizeof(u32));
4800         ilink2 = iwl_read_restricted_mem(priv, base + 6 * sizeof(u32));
4801         data1 = iwl_read_restricted_mem(priv, base + 7 * sizeof(u32));
4802         data2 = iwl_read_restricted_mem(priv, base + 8 * sizeof(u32));
4803         line = iwl_read_restricted_mem(priv, base + 9 * sizeof(u32));
4804         time = iwl_read_restricted_mem(priv, base + 11 * sizeof(u32));
4805
4806         IWL_ERROR("Desc               Time       "
4807                   "data1      data2      line\n");
4808         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4809                   desc_lookup(desc), desc, time, data1, data2, line);
4810         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4811         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4812                   ilink1, ilink2);
4813
4814         iwl_release_restricted_access(priv);
4815 }
4816
4817 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4818
4819 /**
4820  * iwl_print_event_log - Dump error event log to syslog
4821  *
4822  * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4823  */
4824 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4825                                 u32 num_events, u32 mode)
4826 {
4827         u32 i;
4828         u32 base;       /* SRAM byte address of event log header */
4829         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4830         u32 ptr;        /* SRAM byte address of log data */
4831         u32 ev, time, data; /* event log data */
4832
4833         if (num_events == 0)
4834                 return;
4835
4836         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4837
4838         if (mode == 0)
4839                 event_size = 2 * sizeof(u32);
4840         else
4841                 event_size = 3 * sizeof(u32);
4842
4843         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4844
4845         /* "time" is actually "data" for mode 0 (no timestamp).
4846          * place event id # at far right for easier visual parsing. */
4847         for (i = 0; i < num_events; i++) {
4848                 ev = iwl_read_restricted_mem(priv, ptr);
4849                 ptr += sizeof(u32);
4850                 time = iwl_read_restricted_mem(priv, ptr);
4851                 ptr += sizeof(u32);
4852                 if (mode == 0)
4853                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4854                 else {
4855                         data = iwl_read_restricted_mem(priv, ptr);
4856                         ptr += sizeof(u32);
4857                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4858                 }
4859         }
4860 }
4861
4862 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4863 {
4864         int rc;
4865         u32 base;       /* SRAM byte address of event log header */
4866         u32 capacity;   /* event log capacity in # entries */
4867         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4868         u32 num_wraps;  /* # times uCode wrapped to top of log */
4869         u32 next_entry; /* index of next entry to be written by uCode */
4870         u32 size;       /* # entries that we'll print */
4871
4872         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4873         if (!iwl_hw_valid_rtc_data_addr(base)) {
4874                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4875                 return;
4876         }
4877
4878         rc = iwl_grab_restricted_access(priv);
4879         if (rc) {
4880                 IWL_WARNING("Can not read from adapter at this time.\n");
4881                 return;
4882         }
4883
4884         /* event log header */
4885         capacity = iwl_read_restricted_mem(priv, base);
4886         mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4887         num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4888         next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4889
4890         size = num_wraps ? capacity : next_entry;
4891
4892         /* bail out if nothing in log */
4893         if (size == 0) {
4894                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4895                 iwl_release_restricted_access(priv);
4896                 return;
4897         }
4898
4899         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4900                   size, num_wraps);
4901
4902         /* if uCode has wrapped back to top of log, start at the oldest entry,
4903          * i.e the next one that uCode would fill. */
4904         if (num_wraps)
4905                 iwl_print_event_log(priv, next_entry,
4906                                     capacity - next_entry, mode);
4907
4908         /* (then/else) start at top of log */
4909         iwl_print_event_log(priv, 0, next_entry, mode);
4910
4911         iwl_release_restricted_access(priv);
4912 }
4913
4914 /**
4915  * iwl_irq_handle_error - called for HW or SW error interrupt from card
4916  */
4917 static void iwl_irq_handle_error(struct iwl_priv *priv)
4918 {
4919         /* Set the FW error flag -- cleared on iwl_down */
4920         set_bit(STATUS_FW_ERROR, &priv->status);
4921
4922         /* Cancel currently queued command. */
4923         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4924
4925 #ifdef CONFIG_IWLWIFI_DEBUG
4926         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4927                 iwl_dump_nic_error_log(priv);
4928                 iwl_dump_nic_event_log(priv);
4929                 iwl_print_rx_config_cmd(&priv->staging_rxon);
4930         }
4931 #endif
4932
4933         wake_up_interruptible(&priv->wait_command_queue);
4934
4935         /* Keep the restart process from trying to send host
4936          * commands by clearing the INIT status bit */
4937         clear_bit(STATUS_READY, &priv->status);
4938
4939         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4940                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4941                           "Restarting adapter due to uCode error.\n");
4942
4943                 if (iwl_is_associated(priv)) {
4944                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4945                                sizeof(priv->recovery_rxon));
4946                         priv->error_recovering = 1;
4947                 }
4948                 queue_work(priv->workqueue, &priv->restart);
4949         }
4950 }
4951
4952 static void iwl_error_recovery(struct iwl_priv *priv)
4953 {
4954         unsigned long flags;
4955
4956         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4957                sizeof(priv->staging_rxon));
4958         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4959         iwl_commit_rxon(priv);
4960
4961         iwl_rxon_add_station(priv, priv->bssid, 1);
4962
4963         spin_lock_irqsave(&priv->lock, flags);
4964         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4965         priv->error_recovering = 0;
4966         spin_unlock_irqrestore(&priv->lock, flags);
4967 }
4968
4969 static void iwl_irq_tasklet(struct iwl_priv *priv)
4970 {
4971         u32 inta, handled = 0;
4972         u32 inta_fh;
4973         unsigned long flags;
4974 #ifdef CONFIG_IWLWIFI_DEBUG
4975         u32 inta_mask;
4976 #endif
4977
4978         spin_lock_irqsave(&priv->lock, flags);
4979
4980         /* Ack/clear/reset pending uCode interrupts.
4981          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4982          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4983         inta = iwl_read32(priv, CSR_INT);
4984         iwl_write32(priv, CSR_INT, inta);
4985
4986         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4987          * Any new interrupts that happen after this, either while we're
4988          * in this tasklet, or later, will show up in next ISR/tasklet. */
4989         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4990         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4991
4992 #ifdef CONFIG_IWLWIFI_DEBUG
4993         if (iwl_debug_level & IWL_DL_ISR) {
4994                 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4995                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4996                               inta, inta_mask, inta_fh);
4997         }
4998 #endif
4999
5000         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5001          * atomic, make sure that inta covers all the interrupts that
5002          * we've discovered, even if FH interrupt came in just after
5003          * reading CSR_INT. */
5004         if (inta_fh & CSR_FH_INT_RX_MASK)
5005                 inta |= CSR_INT_BIT_FH_RX;
5006         if (inta_fh & CSR_FH_INT_TX_MASK)
5007                 inta |= CSR_INT_BIT_FH_TX;
5008
5009         /* Now service all interrupt bits discovered above. */
5010         if (inta & CSR_INT_BIT_HW_ERR) {
5011                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5012
5013                 /* Tell the device to stop sending interrupts */
5014                 iwl_disable_interrupts(priv);
5015
5016                 iwl_irq_handle_error(priv);
5017
5018                 handled |= CSR_INT_BIT_HW_ERR;
5019
5020                 spin_unlock_irqrestore(&priv->lock, flags);
5021
5022                 return;
5023         }
5024
5025 #ifdef CONFIG_IWLWIFI_DEBUG
5026         if (iwl_debug_level & (IWL_DL_ISR)) {
5027                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5028                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5029                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
5030
5031                 /* Alive notification via Rx interrupt will do the real work */
5032                 if (inta & CSR_INT_BIT_ALIVE)
5033                         IWL_DEBUG_ISR("Alive interrupt\n");
5034         }
5035 #endif
5036         /* Safely ignore these bits for debug checks below */
5037         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5038
5039         /* HW RF KILL switch toggled (4965 only) */
5040         if (inta & CSR_INT_BIT_RF_KILL) {
5041                 int hw_rf_kill = 0;
5042                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
5043                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5044                         hw_rf_kill = 1;
5045
5046                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5047                                 "RF_KILL bit toggled to %s.\n",
5048                                 hw_rf_kill ? "disable radio":"enable radio");
5049
5050                 /* Queue restart only if RF_KILL switch was set to "kill"
5051                  *   when we loaded driver, and is now set to "enable".
5052                  * After we're Alive, RF_KILL gets handled by
5053                  *   iwl_rx_card_state_notif() */
5054                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
5055                         queue_work(priv->workqueue, &priv->restart);
5056
5057                 handled |= CSR_INT_BIT_RF_KILL;
5058         }
5059
5060         /* Chip got too hot and stopped itself (4965 only) */
5061         if (inta & CSR_INT_BIT_CT_KILL) {
5062                 IWL_ERROR("Microcode CT kill error detected.\n");
5063                 handled |= CSR_INT_BIT_CT_KILL;
5064         }
5065
5066         /* Error detected by uCode */
5067         if (inta & CSR_INT_BIT_SW_ERR) {
5068                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5069                           inta);
5070                 iwl_irq_handle_error(priv);
5071                 handled |= CSR_INT_BIT_SW_ERR;
5072         }
5073
5074         /* uCode wakes up after power-down sleep */
5075         if (inta & CSR_INT_BIT_WAKEUP) {
5076                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5077                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
5078                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5079                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5080                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5081                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5082                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5083                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5084
5085                 handled |= CSR_INT_BIT_WAKEUP;
5086         }
5087
5088         /* All uCode command responses, including Tx command responses,
5089          * Rx "responses" (frame-received notification), and other
5090          * notifications from uCode come through here*/
5091         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5092                 iwl_rx_handle(priv);
5093                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5094         }
5095
5096         if (inta & CSR_INT_BIT_FH_TX) {
5097                 IWL_DEBUG_ISR("Tx interrupt\n");
5098                 handled |= CSR_INT_BIT_FH_TX;
5099         }
5100
5101         if (inta & ~handled)
5102                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5103
5104         if (inta & ~CSR_INI_SET_MASK) {
5105                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5106                          inta & ~CSR_INI_SET_MASK);
5107                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5108         }
5109
5110         /* Re-enable all interrupts */
5111         iwl_enable_interrupts(priv);
5112
5113 #ifdef CONFIG_IWLWIFI_DEBUG
5114         if (iwl_debug_level & (IWL_DL_ISR)) {
5115                 inta = iwl_read32(priv, CSR_INT);
5116                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
5117                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5118                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5119                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5120         }
5121 #endif
5122         spin_unlock_irqrestore(&priv->lock, flags);
5123 }
5124
5125 static irqreturn_t iwl_isr(int irq, void *data)
5126 {
5127         struct iwl_priv *priv = data;
5128         u32 inta, inta_mask;
5129         u32 inta_fh;
5130         if (!priv)
5131                 return IRQ_NONE;
5132
5133         spin_lock(&priv->lock);
5134
5135         /* Disable (but don't clear!) interrupts here to avoid
5136          *    back-to-back ISRs and sporadic interrupts from our NIC.
5137          * If we have something to service, the tasklet will re-enable ints.
5138          * If we *don't* have something, we'll re-enable before leaving here. */
5139         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
5140         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
5141
5142         /* Discover which interrupts are active/pending */
5143         inta = iwl_read32(priv, CSR_INT);
5144         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5145
5146         /* Ignore interrupt if there's nothing in NIC to service.
5147          * This may be due to IRQ shared with another device,
5148          * or due to sporadic interrupts thrown from our NIC. */
5149         if (!inta && !inta_fh) {
5150                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5151                 goto none;
5152         }
5153
5154         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5155                 /* Hardware disappeared */
5156                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5157                 goto none;
5158         }
5159
5160         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5161                       inta, inta_mask, inta_fh);
5162
5163         /* iwl_irq_tasklet() will service interrupts and re-enable them */
5164         tasklet_schedule(&priv->irq_tasklet);
5165         spin_unlock(&priv->lock);
5166
5167         return IRQ_HANDLED;
5168
5169  none:
5170         /* re-enable interrupts here since we don't have anything to service. */
5171         iwl_enable_interrupts(priv);
5172         spin_unlock(&priv->lock);
5173         return IRQ_NONE;
5174 }
5175
5176 /************************** EEPROM BANDS ****************************
5177  *
5178  * The iwl_eeprom_band definitions below provide the mapping from the
5179  * EEPROM contents to the specific channel number supported for each
5180  * band.
5181  *
5182  * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
5183  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5184  * The specific geography and calibration information for that channel
5185  * is contained in the eeprom map itself.
5186  *
5187  * During init, we copy the eeprom information and channel map
5188  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5189  *
5190  * channel_map_24/52 provides the index in the channel_info array for a
5191  * given channel.  We have to have two separate maps as there is channel
5192  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5193  * band_2
5194  *
5195  * A value of 0xff stored in the channel_map indicates that the channel
5196  * is not supported by the hardware at all.
5197  *
5198  * A value of 0xfe in the channel_map indicates that the channel is not
5199  * valid for Tx with the current hardware.  This means that
5200  * while the system can tune and receive on a given channel, it may not
5201  * be able to associate or transmit any frames on that
5202  * channel.  There is no corresponding channel information for that
5203  * entry.
5204  *
5205  *********************************************************************/
5206
5207 /* 2.4 GHz */
5208 static const u8 iwl_eeprom_band_1[14] = {
5209         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5210 };
5211
5212 /* 5.2 GHz bands */
5213 static const u8 iwl_eeprom_band_2[] = {
5214         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5215 };
5216
5217 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
5218         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5219 };
5220
5221 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
5222         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5223 };
5224
5225 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
5226         145, 149, 153, 157, 161, 165
5227 };
5228
5229 static u8 iwl_eeprom_band_6[] = {       /* 2.4 FAT channel */
5230         1, 2, 3, 4, 5, 6, 7
5231 };
5232
5233 static u8 iwl_eeprom_band_7[] = {       /* 5.2 FAT channel */
5234         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5235 };
5236
5237 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
5238                                     int *eeprom_ch_count,
5239                                     const struct iwl_eeprom_channel
5240                                     **eeprom_ch_info,
5241                                     const u8 **eeprom_ch_index)
5242 {
5243         switch (band) {
5244         case 1:         /* 2.4GHz band */
5245                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
5246                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5247                 *eeprom_ch_index = iwl_eeprom_band_1;
5248                 break;
5249         case 2:         /* 5.2GHz band */
5250                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
5251                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5252                 *eeprom_ch_index = iwl_eeprom_band_2;
5253                 break;
5254         case 3:         /* 5.2GHz band */
5255                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
5256                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5257                 *eeprom_ch_index = iwl_eeprom_band_3;
5258                 break;
5259         case 4:         /* 5.2GHz band */
5260                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
5261                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5262                 *eeprom_ch_index = iwl_eeprom_band_4;
5263                 break;
5264         case 5:         /* 5.2GHz band */
5265                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
5266                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5267                 *eeprom_ch_index = iwl_eeprom_band_5;
5268                 break;
5269         case 6:
5270                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
5271                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5272                 *eeprom_ch_index = iwl_eeprom_band_6;
5273                 break;
5274         case 7:
5275                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
5276                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5277                 *eeprom_ch_index = iwl_eeprom_band_7;
5278                 break;
5279         default:
5280                 BUG();
5281                 return;
5282         }
5283 }
5284
5285 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
5286                                                     int phymode, u16 channel)
5287 {
5288         int i;
5289
5290         switch (phymode) {
5291         case MODE_IEEE80211A:
5292                 for (i = 14; i < priv->channel_count; i++) {
5293                         if (priv->channel_info[i].channel == channel)
5294                                 return &priv->channel_info[i];
5295                 }
5296                 break;
5297
5298         case MODE_IEEE80211B:
5299         case MODE_IEEE80211G:
5300                 if (channel >= 1 && channel <= 14)
5301                         return &priv->channel_info[channel - 1];
5302                 break;
5303
5304         }
5305
5306         return NULL;
5307 }
5308
5309 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5310                             ? # x " " : "")
5311
5312 static int iwl_init_channel_map(struct iwl_priv *priv)
5313 {
5314         int eeprom_ch_count = 0;
5315         const u8 *eeprom_ch_index = NULL;
5316         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5317         int band, ch;
5318         struct iwl_channel_info *ch_info;
5319
5320         if (priv->channel_count) {
5321                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5322                 return 0;
5323         }
5324
5325         if (priv->eeprom.version < 0x2f) {
5326                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5327                             priv->eeprom.version);
5328                 return -EINVAL;
5329         }
5330
5331         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5332
5333         priv->channel_count =
5334             ARRAY_SIZE(iwl_eeprom_band_1) +
5335             ARRAY_SIZE(iwl_eeprom_band_2) +
5336             ARRAY_SIZE(iwl_eeprom_band_3) +
5337             ARRAY_SIZE(iwl_eeprom_band_4) +
5338             ARRAY_SIZE(iwl_eeprom_band_5);
5339
5340         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5341
5342         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5343                                      priv->channel_count, GFP_KERNEL);
5344         if (!priv->channel_info) {
5345                 IWL_ERROR("Could not allocate channel_info\n");
5346                 priv->channel_count = 0;
5347                 return -ENOMEM;
5348         }
5349
5350         ch_info = priv->channel_info;
5351
5352         /* Loop through the 5 EEPROM bands adding them in order to the
5353          * channel map we maintain (that contains additional information than
5354          * what just in the EEPROM) */
5355         for (band = 1; band <= 5; band++) {
5356
5357                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5358                                         &eeprom_ch_info, &eeprom_ch_index);
5359
5360                 /* Loop through each band adding each of the channels */
5361                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5362                         ch_info->channel = eeprom_ch_index[ch];
5363                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5364                             MODE_IEEE80211A;
5365
5366                         /* permanently store EEPROM's channel regulatory flags
5367                          *   and max power in channel info database. */
5368                         ch_info->eeprom = eeprom_ch_info[ch];
5369
5370                         /* Copy the run-time flags so they are there even on
5371                          * invalid channels */
5372                         ch_info->flags = eeprom_ch_info[ch].flags;
5373
5374                         if (!(is_channel_valid(ch_info))) {
5375                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5376                                                "No traffic\n",
5377                                                ch_info->channel,
5378                                                ch_info->flags,
5379                                                is_channel_a_band(ch_info) ?
5380                                                "5.2" : "2.4");
5381                                 ch_info++;
5382                                 continue;
5383                         }
5384
5385                         /* Initialize regulatory-based run-time data */
5386                         ch_info->max_power_avg = ch_info->curr_txpow =
5387                             eeprom_ch_info[ch].max_power_avg;
5388                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5389                         ch_info->min_power = 0;
5390
5391                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5392                                        " %ddBm): Ad-Hoc %ssupported\n",
5393                                        ch_info->channel,
5394                                        is_channel_a_band(ch_info) ?
5395                                        "5.2" : "2.4",
5396                                        CHECK_AND_PRINT(IBSS),
5397                                        CHECK_AND_PRINT(ACTIVE),
5398                                        CHECK_AND_PRINT(RADAR),
5399                                        CHECK_AND_PRINT(WIDE),
5400                                        CHECK_AND_PRINT(NARROW),
5401                                        CHECK_AND_PRINT(DFS),
5402                                        eeprom_ch_info[ch].flags,
5403                                        eeprom_ch_info[ch].max_power_avg,
5404                                        ((eeprom_ch_info[ch].
5405                                          flags & EEPROM_CHANNEL_IBSS)
5406                                         && !(eeprom_ch_info[ch].
5407                                              flags & EEPROM_CHANNEL_RADAR))
5408                                        ? "" : "not ");
5409
5410                         /* Set the user_txpower_limit to the highest power
5411                          * supported by any channel */
5412                         if (eeprom_ch_info[ch].max_power_avg >
5413                             priv->user_txpower_limit)
5414                                 priv->user_txpower_limit =
5415                                     eeprom_ch_info[ch].max_power_avg;
5416
5417                         ch_info++;
5418                 }
5419         }
5420
5421         for (band = 6; band <= 7; band++) {
5422                 int phymode;
5423                 u8 fat_extension_chan;
5424
5425                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5426                                         &eeprom_ch_info, &eeprom_ch_index);
5427
5428                 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5429                 /* Loop through each band adding each of the channels */
5430                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5431
5432                         if ((band == 6) &&
5433                             ((eeprom_ch_index[ch] == 5) ||
5434                             (eeprom_ch_index[ch] == 6) ||
5435                             (eeprom_ch_index[ch] == 7)))
5436                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5437                         else
5438                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5439
5440                         iwl4965_set_fat_chan_info(priv, phymode,
5441                                                   eeprom_ch_index[ch],
5442                                                   &(eeprom_ch_info[ch]),
5443                                                   fat_extension_chan);
5444
5445                         iwl4965_set_fat_chan_info(priv, phymode,
5446                                                   (eeprom_ch_index[ch] + 4),
5447                                                   &(eeprom_ch_info[ch]),
5448                                                   HT_IE_EXT_CHANNEL_BELOW);
5449                 }
5450         }
5451
5452         return 0;
5453 }
5454
5455 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5456  * sending probe req.  This should be set long enough to hear probe responses
5457  * from more than one AP.  */
5458 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5459 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5460
5461 /* For faster active scanning, scan will move to the next channel if fewer than
5462  * PLCP_QUIET_THRESH packets are heard on this channel within
5463  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5464  * time if it's a quiet channel (nothing responded to our probe, and there's
5465  * no other traffic).
5466  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5467 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5468 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5469
5470 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5471  * Must be set longer than active dwell time.
5472  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5473 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5474 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5475 #define IWL_PASSIVE_DWELL_BASE      (100)
5476 #define IWL_CHANNEL_TUNE_TIME       5
5477
5478 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5479 {
5480         if (phymode == MODE_IEEE80211A)
5481                 return IWL_ACTIVE_DWELL_TIME_52;
5482         else
5483                 return IWL_ACTIVE_DWELL_TIME_24;
5484 }
5485
5486 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5487 {
5488         u16 active = iwl_get_active_dwell_time(priv, phymode);
5489         u16 passive = (phymode != MODE_IEEE80211A) ?
5490             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5491             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5492
5493         if (iwl_is_associated(priv)) {
5494                 /* If we're associated, we clamp the maximum passive
5495                  * dwell time to be 98% of the beacon interval (minus
5496                  * 2 * channel tune time) */
5497                 passive = priv->beacon_int;
5498                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5499                         passive = IWL_PASSIVE_DWELL_BASE;
5500                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5501         }
5502
5503         if (passive <= active)
5504                 passive = active + 1;
5505
5506         return passive;
5507 }
5508
5509 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5510                                      u8 is_active, u8 direct_mask,
5511                                      struct iwl_scan_channel *scan_ch)
5512 {
5513         const struct ieee80211_channel *channels = NULL;
5514         const struct ieee80211_hw_mode *hw_mode;
5515         const struct iwl_channel_info *ch_info;
5516         u16 passive_dwell = 0;
5517         u16 active_dwell = 0;
5518         int added, i;
5519
5520         hw_mode = iwl_get_hw_mode(priv, phymode);
5521         if (!hw_mode)
5522                 return 0;
5523
5524         channels = hw_mode->channels;
5525
5526         active_dwell = iwl_get_active_dwell_time(priv, phymode);
5527         passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5528
5529         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5530                 if (channels[i].chan ==
5531                     le16_to_cpu(priv->active_rxon.channel)) {
5532                         if (iwl_is_associated(priv)) {
5533                                 IWL_DEBUG_SCAN
5534                                     ("Skipping current channel %d\n",
5535                                      le16_to_cpu(priv->active_rxon.channel));
5536                                 continue;
5537                         }
5538                 } else if (priv->only_active_channel)
5539                         continue;
5540
5541                 scan_ch->channel = channels[i].chan;
5542
5543                 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5544                 if (!is_channel_valid(ch_info)) {
5545                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5546                                        scan_ch->channel);
5547                         continue;
5548                 }
5549
5550                 if (!is_active || is_channel_passive(ch_info) ||
5551                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5552                         scan_ch->type = 0;      /* passive */
5553                 else
5554                         scan_ch->type = 1;      /* active */
5555
5556                 if (scan_ch->type & 1)
5557                         scan_ch->type |= (direct_mask << 1);
5558
5559                 if (is_channel_narrow(ch_info))
5560                         scan_ch->type |= (1 << 7);
5561
5562                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5563                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5564
5565                 /* Set power levels to defaults */
5566                 scan_ch->tpc.dsp_atten = 110;
5567                 /* scan_pwr_info->tpc.dsp_atten; */
5568
5569                 /*scan_pwr_info->tpc.tx_gain; */
5570                 if (phymode == MODE_IEEE80211A)
5571                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5572                 else {
5573                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5574                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5575                          * power level
5576                          scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5577                          */
5578                 }
5579
5580                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5581                                scan_ch->channel,
5582                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5583                                (scan_ch->type & 1) ?
5584                                active_dwell : passive_dwell);
5585
5586                 scan_ch++;
5587                 added++;
5588         }
5589
5590         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5591         return added;
5592 }
5593
5594 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5595 {
5596         int i, j;
5597         for (i = 0; i < 3; i++) {
5598                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5599                 for (j = 0; j < hw_mode->num_channels; j++)
5600                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5601         }
5602 }
5603
5604 static void iwl_init_hw_rates(struct iwl_priv *priv,
5605                               struct ieee80211_rate *rates)
5606 {
5607         int i;
5608
5609         for (i = 0; i < IWL_RATE_COUNT; i++) {
5610                 rates[i].rate = iwl_rates[i].ieee * 5;
5611                 rates[i].val = i; /* Rate scaling will work on indexes */
5612                 rates[i].val2 = i;
5613                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5614                 /* Only OFDM have the bits-per-symbol set */
5615                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5616                         rates[i].flags |= IEEE80211_RATE_OFDM;
5617                 else {
5618                         /*
5619                          * If CCK 1M then set rate flag to CCK else CCK_2
5620                          * which is CCK | PREAMBLE2
5621                          */
5622                         rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5623                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5624                 }
5625
5626                 /* Set up which ones are basic rates... */
5627                 if (IWL_BASIC_RATES_MASK & (1 << i))
5628                         rates[i].flags |= IEEE80211_RATE_BASIC;
5629         }
5630
5631         iwl4965_init_hw_rates(priv, rates);
5632 }
5633
5634 /**
5635  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5636  */
5637 static int iwl_init_geos(struct iwl_priv *priv)
5638 {
5639         struct iwl_channel_info *ch;
5640         struct ieee80211_hw_mode *modes;
5641         struct ieee80211_channel *channels;
5642         struct ieee80211_channel *geo_ch;
5643         struct ieee80211_rate *rates;
5644         int i = 0;
5645         enum {
5646                 A = 0,
5647                 B = 1,
5648                 G = 2,
5649                 A_11N = 3,
5650                 G_11N = 4,
5651         };
5652         int mode_count = 5;
5653
5654         if (priv->modes) {
5655                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5656                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5657                 return 0;
5658         }
5659
5660         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5661                         GFP_KERNEL);
5662         if (!modes)
5663                 return -ENOMEM;
5664
5665         channels = kzalloc(sizeof(struct ieee80211_channel) *
5666                            priv->channel_count, GFP_KERNEL);
5667         if (!channels) {
5668                 kfree(modes);
5669                 return -ENOMEM;
5670         }
5671
5672         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5673                         GFP_KERNEL);
5674         if (!rates) {
5675                 kfree(modes);
5676                 kfree(channels);
5677                 return -ENOMEM;
5678         }
5679
5680         /* 0 = 802.11a
5681          * 1 = 802.11b
5682          * 2 = 802.11g
5683          */
5684
5685         /* 5.2GHz channels start after the 2.4GHz channels */
5686         modes[A].mode = MODE_IEEE80211A;
5687         modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5688         modes[A].rates = rates;
5689         modes[A].num_rates = 8; /* just OFDM */
5690         modes[A].rates = &rates[4];
5691         modes[A].num_channels = 0;
5692
5693         modes[B].mode = MODE_IEEE80211B;
5694         modes[B].channels = channels;
5695         modes[B].rates = rates;
5696         modes[B].num_rates = 4; /* just CCK */
5697         modes[B].num_channels = 0;
5698
5699         modes[G].mode = MODE_IEEE80211G;
5700         modes[G].channels = channels;
5701         modes[G].rates = rates;
5702         modes[G].num_rates = 12;        /* OFDM & CCK */
5703         modes[G].num_channels = 0;
5704
5705         modes[G_11N].mode = MODE_IEEE80211G;
5706         modes[G_11N].channels = channels;
5707         modes[G_11N].num_rates = 13;        /* OFDM & CCK */
5708         modes[G_11N].rates = rates;
5709         modes[G_11N].num_channels = 0;
5710
5711         modes[A_11N].mode = MODE_IEEE80211A;
5712         modes[A_11N].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5713         modes[A_11N].rates = &rates[4];
5714         modes[A_11N].num_rates = 9; /* just OFDM */
5715         modes[A_11N].num_channels = 0;
5716
5717         priv->ieee_channels = channels;
5718         priv->ieee_rates = rates;
5719
5720         iwl_init_hw_rates(priv, rates);
5721
5722         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5723                 ch = &priv->channel_info[i];
5724
5725                 if (!is_channel_valid(ch)) {
5726                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5727                                     "skipping.\n",
5728                                     ch->channel, is_channel_a_band(ch) ?
5729                                     "5.2" : "2.4");
5730                         continue;
5731                 }
5732
5733                 if (is_channel_a_band(ch)) {
5734                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5735                         modes[A_11N].num_channels++;
5736                 } else {
5737                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5738                         modes[G].num_channels++;
5739                         modes[G_11N].num_channels++;
5740                 }
5741
5742                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5743                 geo_ch->chan = ch->channel;
5744                 geo_ch->power_level = ch->max_power_avg;
5745                 geo_ch->antenna_max = 0xff;
5746
5747                 if (is_channel_valid(ch)) {
5748                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5749                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5750                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5751
5752                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5753                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5754
5755                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5756                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5757
5758                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5759                                 priv->max_channel_txpower_limit =
5760                                     ch->max_power_avg;
5761                 }
5762
5763                 geo_ch->val = geo_ch->flag;
5764         }
5765
5766         if ((modes[A].num_channels == 0) && priv->is_abg) {
5767                 printk(KERN_INFO DRV_NAME
5768                        ": Incorrectly detected BG card as ABG.  Please send "
5769                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5770                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5771                 priv->is_abg = 0;
5772         }
5773
5774         printk(KERN_INFO DRV_NAME
5775                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5776                modes[G].num_channels, modes[A].num_channels);
5777
5778         /*
5779          * NOTE:  We register these in preference of order -- the
5780          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5781          * a phymode based on rates or AP capabilities but seems to
5782          * configure it purely on if the channel being configured
5783          * is supported by a mode -- and the first match is taken
5784          */
5785
5786         if (modes[G].num_channels)
5787                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5788         if (modes[B].num_channels)
5789                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5790         if (modes[A].num_channels)
5791                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5792
5793         priv->modes = modes;
5794         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5795
5796         return 0;
5797 }
5798
5799 /******************************************************************************
5800  *
5801  * uCode download functions
5802  *
5803  ******************************************************************************/
5804
5805 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5806 {
5807         if (priv->ucode_code.v_addr != NULL) {
5808                 pci_free_consistent(priv->pci_dev,
5809                                     priv->ucode_code.len,
5810                                     priv->ucode_code.v_addr,
5811                                     priv->ucode_code.p_addr);
5812                 priv->ucode_code.v_addr = NULL;
5813         }
5814         if (priv->ucode_data.v_addr != NULL) {
5815                 pci_free_consistent(priv->pci_dev,
5816                                     priv->ucode_data.len,
5817                                     priv->ucode_data.v_addr,
5818                                     priv->ucode_data.p_addr);
5819                 priv->ucode_data.v_addr = NULL;
5820         }
5821         if (priv->ucode_data_backup.v_addr != NULL) {
5822                 pci_free_consistent(priv->pci_dev,
5823                                     priv->ucode_data_backup.len,
5824                                     priv->ucode_data_backup.v_addr,
5825                                     priv->ucode_data_backup.p_addr);
5826                 priv->ucode_data_backup.v_addr = NULL;
5827         }
5828         if (priv->ucode_init.v_addr != NULL) {
5829                 pci_free_consistent(priv->pci_dev,
5830                                     priv->ucode_init.len,
5831                                     priv->ucode_init.v_addr,
5832                                     priv->ucode_init.p_addr);
5833                 priv->ucode_init.v_addr = NULL;
5834         }
5835         if (priv->ucode_init_data.v_addr != NULL) {
5836                 pci_free_consistent(priv->pci_dev,
5837                                     priv->ucode_init_data.len,
5838                                     priv->ucode_init_data.v_addr,
5839                                     priv->ucode_init_data.p_addr);
5840                 priv->ucode_init_data.v_addr = NULL;
5841         }
5842         if (priv->ucode_boot.v_addr != NULL) {
5843                 pci_free_consistent(priv->pci_dev,
5844                                     priv->ucode_boot.len,
5845                                     priv->ucode_boot.v_addr,
5846                                     priv->ucode_boot.p_addr);
5847                 priv->ucode_boot.v_addr = NULL;
5848         }
5849 }
5850
5851 /**
5852  * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5853  *     looking at all data.
5854  */
5855 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5856 {
5857         u32 val;
5858         u32 save_len = len;
5859         int rc = 0;
5860         u32 errcnt;
5861
5862         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5863
5864         rc = iwl_grab_restricted_access(priv);
5865         if (rc)
5866                 return rc;
5867
5868         iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5869
5870         errcnt = 0;
5871         for (; len > 0; len -= sizeof(u32), image++) {
5872                 /* read data comes through single port, auto-incr addr */
5873                 /* NOTE: Use the debugless read so we don't flood kernel log
5874                  * if IWL_DL_IO is set */
5875                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5876                 if (val != le32_to_cpu(*image)) {
5877                         IWL_ERROR("uCode INST section is invalid at "
5878                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5879                                   save_len - len, val, le32_to_cpu(*image));
5880                         rc = -EIO;
5881                         errcnt++;
5882                         if (errcnt >= 20)
5883                                 break;
5884                 }
5885         }
5886
5887         iwl_release_restricted_access(priv);
5888
5889         if (!errcnt)
5890                 IWL_DEBUG_INFO
5891                     ("ucode image in INSTRUCTION memory is good\n");
5892
5893         return rc;
5894 }
5895
5896
5897 /**
5898  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5899  *   using sample data 100 bytes apart.  If these sample points are good,
5900  *   it's a pretty good bet that everything between them is good, too.
5901  */
5902 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5903 {
5904         u32 val;
5905         int rc = 0;
5906         u32 errcnt = 0;
5907         u32 i;
5908
5909         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5910
5911         rc = iwl_grab_restricted_access(priv);
5912         if (rc)
5913                 return rc;
5914
5915         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5916                 /* read data comes through single port, auto-incr addr */
5917                 /* NOTE: Use the debugless read so we don't flood kernel log
5918                  * if IWL_DL_IO is set */
5919                 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5920                         i + RTC_INST_LOWER_BOUND);
5921                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5922                 if (val != le32_to_cpu(*image)) {
5923 #if 0 /* Enable this if you want to see details */
5924                         IWL_ERROR("uCode INST section is invalid at "
5925                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5926                                   i, val, *image);
5927 #endif
5928                         rc = -EIO;
5929                         errcnt++;
5930                         if (errcnt >= 3)
5931                                 break;
5932                 }
5933         }
5934
5935         iwl_release_restricted_access(priv);
5936
5937         return rc;
5938 }
5939
5940
5941 /**
5942  * iwl_verify_ucode - determine which instruction image is in SRAM,
5943  *    and verify its contents
5944  */
5945 static int iwl_verify_ucode(struct iwl_priv *priv)
5946 {
5947         __le32 *image;
5948         u32 len;
5949         int rc = 0;
5950
5951         /* Try bootstrap */
5952         image = (__le32 *)priv->ucode_boot.v_addr;
5953         len = priv->ucode_boot.len;
5954         rc = iwl_verify_inst_sparse(priv, image, len);
5955         if (rc == 0) {
5956                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5957                 return 0;
5958         }
5959
5960         /* Try initialize */
5961         image = (__le32 *)priv->ucode_init.v_addr;
5962         len = priv->ucode_init.len;
5963         rc = iwl_verify_inst_sparse(priv, image, len);
5964         if (rc == 0) {
5965                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5966                 return 0;
5967         }
5968
5969         /* Try runtime/protocol */
5970         image = (__le32 *)priv->ucode_code.v_addr;
5971         len = priv->ucode_code.len;
5972         rc = iwl_verify_inst_sparse(priv, image, len);
5973         if (rc == 0) {
5974                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5975                 return 0;
5976         }
5977
5978         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5979
5980         /* Show first several data entries in instruction SRAM.
5981          * Selection of bootstrap image is arbitrary. */
5982         image = (__le32 *)priv->ucode_boot.v_addr;
5983         len = priv->ucode_boot.len;
5984         rc = iwl_verify_inst_full(priv, image, len);
5985
5986         return rc;
5987 }
5988
5989
5990 /* check contents of special bootstrap uCode SRAM */
5991 static int iwl_verify_bsm(struct iwl_priv *priv)
5992 {
5993         __le32 *image = priv->ucode_boot.v_addr;
5994         u32 len = priv->ucode_boot.len;
5995         u32 reg;
5996         u32 val;
5997
5998         IWL_DEBUG_INFO("Begin verify bsm\n");
5999
6000         /* verify BSM SRAM contents */
6001         val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
6002         for (reg = BSM_SRAM_LOWER_BOUND;
6003              reg < BSM_SRAM_LOWER_BOUND + len;
6004              reg += sizeof(u32), image ++) {
6005                 val = iwl_read_restricted_reg(priv, reg);
6006                 if (val != le32_to_cpu(*image)) {
6007                         IWL_ERROR("BSM uCode verification failed at "
6008                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6009                                   BSM_SRAM_LOWER_BOUND,
6010                                   reg - BSM_SRAM_LOWER_BOUND, len,
6011                                   val, le32_to_cpu(*image));
6012                         return -EIO;
6013                 }
6014         }
6015
6016         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6017
6018         return 0;
6019 }
6020
6021 /**
6022  * iwl_load_bsm - Load bootstrap instructions
6023  *
6024  * BSM operation:
6025  *
6026  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6027  * in special SRAM that does not power down during RFKILL.  When powering back
6028  * up after power-saving sleeps (or during initial uCode load), the BSM loads
6029  * the bootstrap program into the on-board processor, and starts it.
6030  *
6031  * The bootstrap program loads (via DMA) instructions and data for a new
6032  * program from host DRAM locations indicated by the host driver in the
6033  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
6034  * automatically.
6035  *
6036  * When initializing the NIC, the host driver points the BSM to the
6037  * "initialize" uCode image.  This uCode sets up some internal data, then
6038  * notifies host via "initialize alive" that it is complete.
6039  *
6040  * The host then replaces the BSM_DRAM_* pointer values to point to the
6041  * normal runtime uCode instructions and a backup uCode data cache buffer
6042  * (filled initially with starting data values for the on-board processor),
6043  * then triggers the "initialize" uCode to load and launch the runtime uCode,
6044  * which begins normal operation.
6045  *
6046  * When doing a power-save shutdown, runtime uCode saves data SRAM into
6047  * the backup data cache in DRAM before SRAM is powered down.
6048  *
6049  * When powering back up, the BSM loads the bootstrap program.  This reloads
6050  * the runtime uCode instructions and the backup data cache into SRAM,
6051  * and re-launches the runtime uCode from where it left off.
6052  */
6053 static int iwl_load_bsm(struct iwl_priv *priv)
6054 {
6055         __le32 *image = priv->ucode_boot.v_addr;
6056         u32 len = priv->ucode_boot.len;
6057         dma_addr_t pinst;
6058         dma_addr_t pdata;
6059         u32 inst_len;
6060         u32 data_len;
6061         int rc;
6062         int i;
6063         u32 done;
6064         u32 reg_offset;
6065
6066         IWL_DEBUG_INFO("Begin load bsm\n");
6067
6068         /* make sure bootstrap program is no larger than BSM's SRAM size */
6069         if (len > IWL_MAX_BSM_SIZE)
6070                 return -EINVAL;
6071
6072         /* Tell bootstrap uCode where to find the "Initialize" uCode
6073          *   in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
6074          * NOTE:  iwl_initialize_alive_start() will replace these values,
6075          *        after the "initialize" uCode has run, to point to
6076          *        runtime/protocol instructions and backup data cache. */
6077         pinst = priv->ucode_init.p_addr >> 4;
6078         pdata = priv->ucode_init_data.p_addr >> 4;
6079         inst_len = priv->ucode_init.len;
6080         data_len = priv->ucode_init_data.len;
6081
6082         rc = iwl_grab_restricted_access(priv);
6083         if (rc)
6084                 return rc;
6085
6086         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6087         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6088         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6089         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6090
6091         /* Fill BSM memory with bootstrap instructions */
6092         for (reg_offset = BSM_SRAM_LOWER_BOUND;
6093              reg_offset < BSM_SRAM_LOWER_BOUND + len;
6094              reg_offset += sizeof(u32), image++)
6095                 _iwl_write_restricted_reg(priv, reg_offset,
6096                                           le32_to_cpu(*image));
6097
6098         rc = iwl_verify_bsm(priv);
6099         if (rc) {
6100                 iwl_release_restricted_access(priv);
6101                 return rc;
6102         }
6103
6104         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6105         iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
6106         iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
6107                                  RTC_INST_LOWER_BOUND);
6108         iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6109
6110         /* Load bootstrap code into instruction SRAM now,
6111          *   to prepare to load "initialize" uCode */
6112         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6113                 BSM_WR_CTRL_REG_BIT_START);
6114
6115         /* Wait for load of bootstrap uCode to finish */
6116         for (i = 0; i < 100; i++) {
6117                 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
6118                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6119                         break;
6120                 udelay(10);
6121         }
6122         if (i < 100)
6123                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6124         else {
6125                 IWL_ERROR("BSM write did not complete!\n");
6126                 return -EIO;
6127         }
6128
6129         /* Enable future boot loads whenever power management unit triggers it
6130          *   (e.g. when powering back up after power-save shutdown) */
6131         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6132                 BSM_WR_CTRL_REG_BIT_START_EN);
6133
6134         iwl_release_restricted_access(priv);
6135
6136         return 0;
6137 }
6138
6139 static void iwl_nic_start(struct iwl_priv *priv)
6140 {
6141         /* Remove all resets to allow NIC to operate */
6142         iwl_write32(priv, CSR_RESET, 0);
6143 }
6144
6145 /**
6146  * iwl_read_ucode - Read uCode images from disk file.
6147  *
6148  * Copy into buffers for card to fetch via bus-mastering
6149  */
6150 static int iwl_read_ucode(struct iwl_priv *priv)
6151 {
6152         struct iwl_ucode *ucode;
6153         int rc = 0;
6154         const struct firmware *ucode_raw;
6155         const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6156         u8 *src;
6157         size_t len;
6158         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6159
6160         /* Ask kernel firmware_class module to get the boot firmware off disk.
6161          * request_firmware() is synchronous, file is in memory on return. */
6162         rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6163         if (rc < 0) {
6164                 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
6165                 goto error;
6166         }
6167
6168         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6169                        name, ucode_raw->size);
6170
6171         /* Make sure that we got at least our header! */
6172         if (ucode_raw->size < sizeof(*ucode)) {
6173                 IWL_ERROR("File size way too small!\n");
6174                 rc = -EINVAL;
6175                 goto err_release;
6176         }
6177
6178         /* Data from ucode file:  header followed by uCode images */
6179         ucode = (void *)ucode_raw->data;
6180
6181         ver = le32_to_cpu(ucode->ver);
6182         inst_size = le32_to_cpu(ucode->inst_size);
6183         data_size = le32_to_cpu(ucode->data_size);
6184         init_size = le32_to_cpu(ucode->init_size);
6185         init_data_size = le32_to_cpu(ucode->init_data_size);
6186         boot_size = le32_to_cpu(ucode->boot_size);
6187
6188         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6189         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6190                        inst_size);
6191         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6192                        data_size);
6193         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6194                        init_size);
6195         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6196                        init_data_size);
6197         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6198                        boot_size);
6199
6200         /* Verify size of file vs. image size info in file's header */
6201         if (ucode_raw->size < sizeof(*ucode) +
6202                 inst_size + data_size + init_size +
6203                 init_data_size + boot_size) {
6204
6205                 IWL_DEBUG_INFO("uCode file size %d too small\n",
6206                                (int)ucode_raw->size);
6207                 rc = -EINVAL;
6208                 goto err_release;
6209         }
6210
6211         /* Verify that uCode images will fit in card's SRAM */
6212         if (inst_size > IWL_MAX_INST_SIZE) {
6213                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
6214                                (int)inst_size);
6215                 rc = -EINVAL;
6216                 goto err_release;
6217         }
6218
6219         if (data_size > IWL_MAX_DATA_SIZE) {
6220                 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
6221                                (int)data_size);
6222                 rc = -EINVAL;
6223                 goto err_release;
6224         }
6225         if (init_size > IWL_MAX_INST_SIZE) {
6226                 IWL_DEBUG_INFO
6227                     ("uCode init instr len %d too large to fit in card\n",
6228                      (int)init_size);
6229                 rc = -EINVAL;
6230                 goto err_release;
6231         }
6232         if (init_data_size > IWL_MAX_DATA_SIZE) {
6233                 IWL_DEBUG_INFO
6234                     ("uCode init data len %d too large to fit in card\n",
6235                      (int)init_data_size);
6236                 rc = -EINVAL;
6237                 goto err_release;
6238         }
6239         if (boot_size > IWL_MAX_BSM_SIZE) {
6240                 IWL_DEBUG_INFO
6241                     ("uCode boot instr len %d too large to fit in bsm\n",
6242                      (int)boot_size);
6243                 rc = -EINVAL;
6244                 goto err_release;
6245         }
6246
6247         /* Allocate ucode buffers for card's bus-master loading ... */
6248
6249         /* Runtime instructions and 2 copies of data:
6250          * 1) unmodified from disk
6251          * 2) backup cache for save/restore during power-downs */
6252         priv->ucode_code.len = inst_size;
6253         priv->ucode_code.v_addr =
6254             pci_alloc_consistent(priv->pci_dev,
6255                                  priv->ucode_code.len,
6256                                  &(priv->ucode_code.p_addr));
6257
6258         priv->ucode_data.len = data_size;
6259         priv->ucode_data.v_addr =
6260             pci_alloc_consistent(priv->pci_dev,
6261                                  priv->ucode_data.len,
6262                                  &(priv->ucode_data.p_addr));
6263
6264         priv->ucode_data_backup.len = data_size;
6265         priv->ucode_data_backup.v_addr =
6266             pci_alloc_consistent(priv->pci_dev,
6267                                  priv->ucode_data_backup.len,
6268                                  &(priv->ucode_data_backup.p_addr));
6269
6270
6271         /* Initialization instructions and data */
6272         priv->ucode_init.len = init_size;
6273         priv->ucode_init.v_addr =
6274             pci_alloc_consistent(priv->pci_dev,
6275                                  priv->ucode_init.len,
6276                                  &(priv->ucode_init.p_addr));
6277
6278         priv->ucode_init_data.len = init_data_size;
6279         priv->ucode_init_data.v_addr =
6280             pci_alloc_consistent(priv->pci_dev,
6281                                  priv->ucode_init_data.len,
6282                                  &(priv->ucode_init_data.p_addr));
6283
6284         /* Bootstrap (instructions only, no data) */
6285         priv->ucode_boot.len = boot_size;
6286         priv->ucode_boot.v_addr =
6287             pci_alloc_consistent(priv->pci_dev,
6288                                  priv->ucode_boot.len,
6289                                  &(priv->ucode_boot.p_addr));
6290
6291         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
6292             !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
6293             !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
6294                 goto err_pci_alloc;
6295
6296         /* Copy images into buffers for card's bus-master reads ... */
6297
6298         /* Runtime instructions (first block of data in file) */
6299         src = &ucode->data[0];
6300         len = priv->ucode_code.len;
6301         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
6302                        (int)len);
6303         memcpy(priv->ucode_code.v_addr, src, len);
6304         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6305                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6306
6307         /* Runtime data (2nd block)
6308          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
6309         src = &ucode->data[inst_size];
6310         len = priv->ucode_data.len;
6311         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
6312                        (int)len);
6313         memcpy(priv->ucode_data.v_addr, src, len);
6314         memcpy(priv->ucode_data_backup.v_addr, src, len);
6315
6316         /* Initialization instructions (3rd block) */
6317         if (init_size) {
6318                 src = &ucode->data[inst_size + data_size];
6319                 len = priv->ucode_init.len;
6320                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
6321                                (int)len);
6322                 memcpy(priv->ucode_init.v_addr, src, len);
6323         }
6324
6325         /* Initialization data (4th block) */
6326         if (init_data_size) {
6327                 src = &ucode->data[inst_size + data_size + init_size];
6328                 len = priv->ucode_init_data.len;
6329                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6330                                (int)len);
6331                 memcpy(priv->ucode_init_data.v_addr, src, len);
6332         }
6333
6334         /* Bootstrap instructions (5th block) */
6335         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6336         len = priv->ucode_boot.len;
6337         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6338                        (int)len);
6339         memcpy(priv->ucode_boot.v_addr, src, len);
6340
6341         /* We have our copies now, allow OS release its copies */
6342         release_firmware(ucode_raw);
6343         return 0;
6344
6345  err_pci_alloc:
6346         IWL_ERROR("failed to allocate pci memory\n");
6347         rc = -ENOMEM;
6348         iwl_dealloc_ucode_pci(priv);
6349
6350  err_release:
6351         release_firmware(ucode_raw);
6352
6353  error:
6354         return rc;
6355 }
6356
6357
6358 /**
6359  * iwl_set_ucode_ptrs - Set uCode address location
6360  *
6361  * Tell initialization uCode where to find runtime uCode.
6362  *
6363  * BSM registers initially contain pointers to initialization uCode.
6364  * We need to replace them to load runtime uCode inst and data,
6365  * and to save runtime data when powering down.
6366  */
6367 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6368 {
6369         dma_addr_t pinst;
6370         dma_addr_t pdata;
6371         int rc = 0;
6372         unsigned long flags;
6373
6374         /* bits 35:4 for 4965 */
6375         pinst = priv->ucode_code.p_addr >> 4;
6376         pdata = priv->ucode_data_backup.p_addr >> 4;
6377
6378         spin_lock_irqsave(&priv->lock, flags);
6379         rc = iwl_grab_restricted_access(priv);
6380         if (rc) {
6381                 spin_unlock_irqrestore(&priv->lock, flags);
6382                 return rc;
6383         }
6384
6385         /* Tell bootstrap uCode where to find image to load */
6386         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6387         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6388         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6389                                  priv->ucode_data.len);
6390
6391         /* Inst bytecount must be last to set up, bit 31 signals uCode
6392          *   that all new ptr/size info is in place */
6393         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6394                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6395
6396         iwl_release_restricted_access(priv);
6397
6398         spin_unlock_irqrestore(&priv->lock, flags);
6399
6400         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6401
6402         return rc;
6403 }
6404
6405 /**
6406  * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6407  *
6408  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6409  *
6410  * The 4965 "initialize" ALIVE reply contains calibration data for:
6411  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6412  *   (3945 does not contain this data).
6413  *
6414  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6415 */
6416 static void iwl_init_alive_start(struct iwl_priv *priv)
6417 {
6418         /* Check alive response for "valid" sign from uCode */
6419         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6420                 /* We had an error bringing up the hardware, so take it
6421                  * all the way back down so we can try again */
6422                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6423                 goto restart;
6424         }
6425
6426         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6427          * This is a paranoid check, because we would not have gotten the
6428          * "initialize" alive if code weren't properly loaded.  */
6429         if (iwl_verify_ucode(priv)) {
6430                 /* Runtime instruction load was bad;
6431                  * take it all the way back down so we can try again */
6432                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6433                 goto restart;
6434         }
6435
6436         /* Calculate temperature */
6437         priv->temperature = iwl4965_get_temperature(priv);
6438
6439         /* Send pointers to protocol/runtime uCode image ... init code will
6440          * load and launch runtime uCode, which will send us another "Alive"
6441          * notification. */
6442         IWL_DEBUG_INFO("Initialization Alive received.\n");
6443         if (iwl_set_ucode_ptrs(priv)) {
6444                 /* Runtime instruction load won't happen;
6445                  * take it all the way back down so we can try again */
6446                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6447                 goto restart;
6448         }
6449         return;
6450
6451  restart:
6452         queue_work(priv->workqueue, &priv->restart);
6453 }
6454
6455
6456 /**
6457  * iwl_alive_start - called after REPLY_ALIVE notification received
6458  *                   from protocol/runtime uCode (initialization uCode's
6459  *                   Alive gets handled by iwl_init_alive_start()).
6460  */
6461 static void iwl_alive_start(struct iwl_priv *priv)
6462 {
6463         int rc = 0;
6464
6465         IWL_DEBUG_INFO("Runtime Alive received.\n");
6466
6467         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6468                 /* We had an error bringing up the hardware, so take it
6469                  * all the way back down so we can try again */
6470                 IWL_DEBUG_INFO("Alive failed.\n");
6471                 goto restart;
6472         }
6473
6474         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6475          * This is a paranoid check, because we would not have gotten the
6476          * "runtime" alive if code weren't properly loaded.  */
6477         if (iwl_verify_ucode(priv)) {
6478                 /* Runtime instruction load was bad;
6479                  * take it all the way back down so we can try again */
6480                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6481                 goto restart;
6482         }
6483
6484         iwl_clear_stations_table(priv);
6485
6486         rc = iwl4965_alive_notify(priv);
6487         if (rc) {
6488                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6489                             rc);
6490                 goto restart;
6491         }
6492
6493         /* After the ALIVE response, we can process host commands */
6494         set_bit(STATUS_ALIVE, &priv->status);
6495
6496         /* Clear out the uCode error bit if it is set */
6497         clear_bit(STATUS_FW_ERROR, &priv->status);
6498
6499         rc = iwl_init_channel_map(priv);
6500         if (rc) {
6501                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6502                 return;
6503         }
6504
6505         iwl_init_geos(priv);
6506
6507         if (iwl_is_rfkill(priv))
6508                 return;
6509
6510         if (!priv->mac80211_registered) {
6511                 /* Unlock so any user space entry points can call back into
6512                  * the driver without a deadlock... */
6513                 mutex_unlock(&priv->mutex);
6514                 iwl_rate_control_register(priv->hw);
6515                 rc = ieee80211_register_hw(priv->hw);
6516                 priv->hw->conf.beacon_int = 100;
6517                 mutex_lock(&priv->mutex);
6518
6519                 if (rc) {
6520                         IWL_ERROR("Failed to register network "
6521                                   "device (error %d)\n", rc);
6522                         return;
6523                 }
6524
6525                 priv->mac80211_registered = 1;
6526
6527                 iwl_reset_channel_flag(priv);
6528         } else
6529                 ieee80211_start_queues(priv->hw);
6530
6531         priv->active_rate = priv->rates_mask;
6532         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6533
6534         iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6535
6536         if (iwl_is_associated(priv)) {
6537                 struct iwl_rxon_cmd *active_rxon =
6538                                 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6539
6540                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6541                        sizeof(priv->staging_rxon));
6542                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6543         } else {
6544                 /* Initialize our rx_config data */
6545                 iwl_connection_init_rx_config(priv);
6546                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6547         }
6548
6549         /* Configure BT coexistence */
6550         iwl_send_bt_config(priv);
6551
6552         /* Configure the adapter for unassociated operation */
6553         iwl_commit_rxon(priv);
6554
6555         /* At this point, the NIC is initialized and operational */
6556         priv->notif_missed_beacons = 0;
6557         set_bit(STATUS_READY, &priv->status);
6558
6559         iwl4965_rf_kill_ct_config(priv);
6560         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6561
6562         if (priv->error_recovering)
6563                 iwl_error_recovery(priv);
6564
6565         return;
6566
6567  restart:
6568         queue_work(priv->workqueue, &priv->restart);
6569 }
6570
6571 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6572
6573 static void __iwl_down(struct iwl_priv *priv)
6574 {
6575         unsigned long flags;
6576         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6577         struct ieee80211_conf *conf = NULL;
6578
6579         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6580
6581         conf = ieee80211_get_hw_conf(priv->hw);
6582
6583         if (!exit_pending)
6584                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6585
6586         iwl_clear_stations_table(priv);
6587
6588         /* Unblock any waiting calls */
6589         wake_up_interruptible_all(&priv->wait_command_queue);
6590
6591         iwl_cancel_deferred_work(priv);
6592
6593         /* Wipe out the EXIT_PENDING status bit if we are not actually
6594          * exiting the module */
6595         if (!exit_pending)
6596                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6597
6598         /* stop and reset the on-board processor */
6599         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6600
6601         /* tell the device to stop sending interrupts */
6602         iwl_disable_interrupts(priv);
6603
6604         if (priv->mac80211_registered)
6605                 ieee80211_stop_queues(priv->hw);
6606
6607         /* If we have not previously called iwl_init() then
6608          * clear all bits but the RF Kill and SUSPEND bits and return */
6609         if (!iwl_is_init(priv)) {
6610                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6611                                         STATUS_RF_KILL_HW |
6612                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6613                                         STATUS_RF_KILL_SW |
6614                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6615                                         STATUS_IN_SUSPEND;
6616                 goto exit;
6617         }
6618
6619         /* ...otherwise clear out all the status bits but the RF Kill and
6620          * SUSPEND bits and continue taking the NIC down. */
6621         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6622                                 STATUS_RF_KILL_HW |
6623                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6624                                 STATUS_RF_KILL_SW |
6625                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6626                                 STATUS_IN_SUSPEND |
6627                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6628                                 STATUS_FW_ERROR;
6629
6630         spin_lock_irqsave(&priv->lock, flags);
6631         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6632         spin_unlock_irqrestore(&priv->lock, flags);
6633
6634         iwl_hw_txq_ctx_stop(priv);
6635         iwl_hw_rxq_stop(priv);
6636
6637         spin_lock_irqsave(&priv->lock, flags);
6638         if (!iwl_grab_restricted_access(priv)) {
6639                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6640                                          APMG_CLK_VAL_DMA_CLK_RQT);
6641                 iwl_release_restricted_access(priv);
6642         }
6643         spin_unlock_irqrestore(&priv->lock, flags);
6644
6645         udelay(5);
6646
6647         iwl_hw_nic_stop_master(priv);
6648         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6649         iwl_hw_nic_reset(priv);
6650
6651  exit:
6652         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6653
6654         if (priv->ibss_beacon)
6655                 dev_kfree_skb(priv->ibss_beacon);
6656         priv->ibss_beacon = NULL;
6657
6658         /* clear out any free frames */
6659         iwl_clear_free_frames(priv);
6660 }
6661
6662 static void iwl_down(struct iwl_priv *priv)
6663 {
6664         mutex_lock(&priv->mutex);
6665         __iwl_down(priv);
6666         mutex_unlock(&priv->mutex);
6667 }
6668
6669 #define MAX_HW_RESTARTS 5
6670
6671 static int __iwl_up(struct iwl_priv *priv)
6672 {
6673         DECLARE_MAC_BUF(mac);
6674         int rc, i;
6675         u32 hw_rf_kill = 0;
6676
6677         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6678                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6679                 return -EIO;
6680         }
6681
6682         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6683                 IWL_WARNING("Radio disabled by SW RF kill (module "
6684                             "parameter)\n");
6685                 return 0;
6686         }
6687
6688         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6689
6690         rc = iwl_hw_nic_init(priv);
6691         if (rc) {
6692                 IWL_ERROR("Unable to int nic\n");
6693                 return rc;
6694         }
6695
6696         /* make sure rfkill handshake bits are cleared */
6697         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6698         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6699                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6700
6701         /* clear (again), then enable host interrupts */
6702         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6703         iwl_enable_interrupts(priv);
6704
6705         /* really make sure rfkill handshake bits are cleared */
6706         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6707         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6708
6709         /* Copy original ucode data image from disk into backup cache.
6710          * This will be used to initialize the on-board processor's
6711          * data SRAM for a clean start when the runtime program first loads. */
6712         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6713                         priv->ucode_data.len);
6714
6715         /* If platform's RF_KILL switch is set to KILL,
6716          * wait for BIT_INT_RF_KILL interrupt before loading uCode
6717          * and getting things started */
6718         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
6719                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
6720                 hw_rf_kill = 1;
6721
6722         if (test_bit(STATUS_RF_KILL_HW, &priv->status) || hw_rf_kill) {
6723                 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6724                 return 0;
6725         }
6726
6727         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6728
6729                 iwl_clear_stations_table(priv);
6730
6731                 /* load bootstrap state machine,
6732                  * load bootstrap program into processor's memory,
6733                  * prepare to load the "initialize" uCode */
6734                 rc = iwl_load_bsm(priv);
6735
6736                 if (rc) {
6737                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6738                         continue;
6739                 }
6740
6741                 /* start card; "initialize" will load runtime ucode */
6742                 iwl_nic_start(priv);
6743
6744                 /* MAC Address location in EEPROM same for 3945/4965 */
6745                 get_eeprom_mac(priv, priv->mac_addr);
6746                 IWL_DEBUG_INFO("MAC address: %s\n",
6747                                print_mac(mac, priv->mac_addr));
6748
6749                 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6750
6751                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6752
6753                 return 0;
6754         }
6755
6756         set_bit(STATUS_EXIT_PENDING, &priv->status);
6757         __iwl_down(priv);
6758
6759         /* tried to restart and config the device for as long as our
6760          * patience could withstand */
6761         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6762         return -EIO;
6763 }
6764
6765
6766 /*****************************************************************************
6767  *
6768  * Workqueue callbacks
6769  *
6770  *****************************************************************************/
6771
6772 static void iwl_bg_init_alive_start(struct work_struct *data)
6773 {
6774         struct iwl_priv *priv =
6775             container_of(data, struct iwl_priv, init_alive_start.work);
6776
6777         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6778                 return;
6779
6780         mutex_lock(&priv->mutex);
6781         iwl_init_alive_start(priv);
6782         mutex_unlock(&priv->mutex);
6783 }
6784
6785 static void iwl_bg_alive_start(struct work_struct *data)
6786 {
6787         struct iwl_priv *priv =
6788             container_of(data, struct iwl_priv, alive_start.work);
6789
6790         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6791                 return;
6792
6793         mutex_lock(&priv->mutex);
6794         iwl_alive_start(priv);
6795         mutex_unlock(&priv->mutex);
6796 }
6797
6798 static void iwl_bg_rf_kill(struct work_struct *work)
6799 {
6800         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6801
6802         wake_up_interruptible(&priv->wait_command_queue);
6803
6804         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6805                 return;
6806
6807         mutex_lock(&priv->mutex);
6808
6809         if (!iwl_is_rfkill(priv)) {
6810                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6811                           "HW and/or SW RF Kill no longer active, restarting "
6812                           "device\n");
6813                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6814                         queue_work(priv->workqueue, &priv->restart);
6815         } else {
6816
6817                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6818                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6819                                           "disabled by SW switch\n");
6820                 else
6821                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6822                                     "Kill switch must be turned off for "
6823                                     "wireless networking to work.\n");
6824         }
6825         mutex_unlock(&priv->mutex);
6826 }
6827
6828 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6829
6830 static void iwl_bg_scan_check(struct work_struct *data)
6831 {
6832         struct iwl_priv *priv =
6833             container_of(data, struct iwl_priv, scan_check.work);
6834
6835         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6836                 return;
6837
6838         mutex_lock(&priv->mutex);
6839         if (test_bit(STATUS_SCANNING, &priv->status) ||
6840             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6841                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6842                           "Scan completion watchdog resetting adapter (%dms)\n",
6843                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6844                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6845                         queue_work(priv->workqueue, &priv->restart);
6846         }
6847         mutex_unlock(&priv->mutex);
6848 }
6849
6850 static void iwl_bg_request_scan(struct work_struct *data)
6851 {
6852         struct iwl_priv *priv =
6853             container_of(data, struct iwl_priv, request_scan);
6854         struct iwl_host_cmd cmd = {
6855                 .id = REPLY_SCAN_CMD,
6856                 .len = sizeof(struct iwl_scan_cmd),
6857                 .meta.flags = CMD_SIZE_HUGE,
6858         };
6859         int rc = 0;
6860         struct iwl_scan_cmd *scan;
6861         struct ieee80211_conf *conf = NULL;
6862         u8 direct_mask;
6863         int phymode;
6864
6865         conf = ieee80211_get_hw_conf(priv->hw);
6866
6867         mutex_lock(&priv->mutex);
6868
6869         if (!iwl_is_ready(priv)) {
6870                 IWL_WARNING("request scan called when driver not ready.\n");
6871                 goto done;
6872         }
6873
6874         /* Make sure the scan wasn't cancelled before this queued work
6875          * was given the chance to run... */
6876         if (!test_bit(STATUS_SCANNING, &priv->status))
6877                 goto done;
6878
6879         /* This should never be called or scheduled if there is currently
6880          * a scan active in the hardware. */
6881         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6882                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6883                                "Ignoring second request.\n");
6884                 rc = -EIO;
6885                 goto done;
6886         }
6887
6888         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6889                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6890                 goto done;
6891         }
6892
6893         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6894                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6895                 goto done;
6896         }
6897
6898         if (iwl_is_rfkill(priv)) {
6899                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6900                 goto done;
6901         }
6902
6903         if (!test_bit(STATUS_READY, &priv->status)) {
6904                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6905                 goto done;
6906         }
6907
6908         if (!priv->scan_bands) {
6909                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6910                 goto done;
6911         }
6912
6913         if (!priv->scan) {
6914                 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6915                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6916                 if (!priv->scan) {
6917                         rc = -ENOMEM;
6918                         goto done;
6919                 }
6920         }
6921         scan = priv->scan;
6922         memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6923
6924         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6925         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6926
6927         if (iwl_is_associated(priv)) {
6928                 u16 interval = 0;
6929                 u32 extra;
6930                 u32 suspend_time = 100;
6931                 u32 scan_suspend_time = 100;
6932                 unsigned long flags;
6933
6934                 IWL_DEBUG_INFO("Scanning while associated...\n");
6935
6936                 spin_lock_irqsave(&priv->lock, flags);
6937                 interval = priv->beacon_int;
6938                 spin_unlock_irqrestore(&priv->lock, flags);
6939
6940                 scan->suspend_time = 0;
6941                 scan->max_out_time = cpu_to_le32(600 * 1024);
6942                 if (!interval)
6943                         interval = suspend_time;
6944
6945                 extra = (suspend_time / interval) << 22;
6946                 scan_suspend_time = (extra |
6947                     ((suspend_time % interval) * 1024));
6948                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6949                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6950                                scan_suspend_time, interval);
6951         }
6952
6953         /* We should add the ability for user to lock to PASSIVE ONLY */
6954         if (priv->one_direct_scan) {
6955                 IWL_DEBUG_SCAN
6956                     ("Kicking off one direct scan for '%s'\n",
6957                      iwl_escape_essid(priv->direct_ssid,
6958                                       priv->direct_ssid_len));
6959                 scan->direct_scan[0].id = WLAN_EID_SSID;
6960                 scan->direct_scan[0].len = priv->direct_ssid_len;
6961                 memcpy(scan->direct_scan[0].ssid,
6962                        priv->direct_ssid, priv->direct_ssid_len);
6963                 direct_mask = 1;
6964         } else if (!iwl_is_associated(priv)) {
6965                 scan->direct_scan[0].id = WLAN_EID_SSID;
6966                 scan->direct_scan[0].len = priv->essid_len;
6967                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6968                 direct_mask = 1;
6969         } else
6970                 direct_mask = 0;
6971
6972         /* We don't build a direct scan probe request; the uCode will do
6973          * that based on the direct_mask added to each channel entry */
6974         scan->tx_cmd.len = cpu_to_le16(
6975                 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6976                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6977         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6978         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6979         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6980
6981         /* flags + rate selection */
6982
6983         scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
6984
6985         switch (priv->scan_bands) {
6986         case 2:
6987                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6988                 scan->tx_cmd.rate_n_flags =
6989                                 iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6990                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6991
6992                 scan->good_CRC_th = 0;
6993                 phymode = MODE_IEEE80211G;
6994                 break;
6995
6996         case 1:
6997                 scan->tx_cmd.rate_n_flags =
6998                                 iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6999                                 RATE_MCS_ANT_B_MSK);
7000                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7001                 phymode = MODE_IEEE80211A;
7002                 break;
7003
7004         default:
7005                 IWL_WARNING("Invalid scan band count\n");
7006                 goto done;
7007         }
7008
7009         /* select Rx chains */
7010
7011         /* Force use of chains B and C (0x6) for scan Rx.
7012          * Avoid A (0x1) because of its off-channel reception on A-band.
7013          * MIMO is not used here, but value is required to make uCode happy. */
7014         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7015                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7016                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7017                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7018
7019         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7020                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7021
7022         if (direct_mask)
7023                 IWL_DEBUG_SCAN
7024                     ("Initiating direct scan for %s.\n",
7025                      iwl_escape_essid(priv->essid, priv->essid_len));
7026         else
7027                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7028
7029         scan->channel_count =
7030                 iwl_get_channels_for_scan(
7031                         priv, phymode, 1, /* active */
7032                         direct_mask,
7033                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7034
7035         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7036             scan->channel_count * sizeof(struct iwl_scan_channel);
7037         cmd.data = scan;
7038         scan->len = cpu_to_le16(cmd.len);
7039
7040         set_bit(STATUS_SCAN_HW, &priv->status);
7041         rc = iwl_send_cmd_sync(priv, &cmd);
7042         if (rc)
7043                 goto done;
7044
7045         queue_delayed_work(priv->workqueue, &priv->scan_check,
7046                            IWL_SCAN_CHECK_WATCHDOG);
7047
7048         mutex_unlock(&priv->mutex);
7049         return;
7050
7051  done:
7052         /* inform mac80211 sacn aborted */
7053         queue_work(priv->workqueue, &priv->scan_completed);
7054         mutex_unlock(&priv->mutex);
7055 }
7056
7057 static void iwl_bg_up(struct work_struct *data)
7058 {
7059         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
7060
7061         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7062                 return;
7063
7064         mutex_lock(&priv->mutex);
7065         __iwl_up(priv);
7066         mutex_unlock(&priv->mutex);
7067 }
7068
7069 static void iwl_bg_restart(struct work_struct *data)
7070 {
7071         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
7072
7073         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7074                 return;
7075
7076         iwl_down(priv);
7077         queue_work(priv->workqueue, &priv->up);
7078 }
7079
7080 static void iwl_bg_rx_replenish(struct work_struct *data)
7081 {
7082         struct iwl_priv *priv =
7083             container_of(data, struct iwl_priv, rx_replenish);
7084
7085         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7086                 return;
7087
7088         mutex_lock(&priv->mutex);
7089         iwl_rx_replenish(priv);
7090         mutex_unlock(&priv->mutex);
7091 }
7092
7093 static void iwl_bg_post_associate(struct work_struct *data)
7094 {
7095         struct iwl_priv *priv = container_of(data, struct iwl_priv,
7096                                              post_associate.work);
7097
7098         int rc = 0;
7099         struct ieee80211_conf *conf = NULL;
7100         DECLARE_MAC_BUF(mac);
7101
7102         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7103                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7104                 return;
7105         }
7106
7107         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7108                         priv->assoc_id,
7109                         print_mac(mac, priv->active_rxon.bssid_addr));
7110
7111
7112         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7113                 return;
7114
7115         mutex_lock(&priv->mutex);
7116
7117         conf = ieee80211_get_hw_conf(priv->hw);
7118
7119         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7120         iwl_commit_rxon(priv);
7121
7122         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7123         iwl_setup_rxon_timing(priv);
7124         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7125                               sizeof(priv->rxon_timing), &priv->rxon_timing);
7126         if (rc)
7127                 IWL_WARNING("REPLY_RXON_TIMING failed - "
7128                             "Attempting to continue.\n");
7129
7130         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7131
7132 #ifdef CONFIG_IWLWIFI_HT
7133         if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
7134                 iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
7135         else {
7136                 priv->active_rate_ht[0] = 0;
7137                 priv->active_rate_ht[1] = 0;
7138                 priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
7139         }
7140 #endif /* CONFIG_IWLWIFI_HT*/
7141         iwl4965_set_rxon_chain(priv);
7142         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7143
7144         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7145                         priv->assoc_id, priv->beacon_int);
7146
7147         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7148                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7149         else
7150                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7151
7152         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7153                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7154                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7155                 else
7156                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7157
7158                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7159                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7160
7161         }
7162
7163         iwl_commit_rxon(priv);
7164
7165         switch (priv->iw_mode) {
7166         case IEEE80211_IF_TYPE_STA:
7167                 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
7168                 break;
7169
7170         case IEEE80211_IF_TYPE_IBSS:
7171
7172                 /* clear out the station table */
7173                 iwl_clear_stations_table(priv);
7174
7175                 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7176                 iwl_rxon_add_station(priv, priv->bssid, 0);
7177                 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
7178                 iwl_send_beacon_cmd(priv);
7179
7180                 break;
7181
7182         default:
7183                 IWL_ERROR("%s Should not be called in %d mode\n",
7184                                 __FUNCTION__, priv->iw_mode);
7185                 break;
7186         }
7187
7188         iwl_sequence_reset(priv);
7189
7190 #ifdef CONFIG_IWLWIFI_SENSITIVITY
7191         /* Enable Rx differential gain and sensitivity calibrations */
7192         iwl4965_chain_noise_reset(priv);
7193         priv->start_calib = 1;
7194 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
7195
7196         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7197                 priv->assoc_station_added = 1;
7198
7199 #ifdef CONFIG_IWLWIFI_QOS
7200         iwl_activate_qos(priv, 0);
7201 #endif /* CONFIG_IWLWIFI_QOS */
7202         mutex_unlock(&priv->mutex);
7203 }
7204
7205 static void iwl_bg_abort_scan(struct work_struct *work)
7206 {
7207         struct iwl_priv *priv = container_of(work, struct iwl_priv,
7208                                              abort_scan);
7209
7210         if (!iwl_is_ready(priv))
7211                 return;
7212
7213         mutex_lock(&priv->mutex);
7214
7215         set_bit(STATUS_SCAN_ABORTING, &priv->status);
7216         iwl_send_scan_abort(priv);
7217
7218         mutex_unlock(&priv->mutex);
7219 }
7220
7221 static void iwl_bg_scan_completed(struct work_struct *work)
7222 {
7223         struct iwl_priv *priv =
7224             container_of(work, struct iwl_priv, scan_completed);
7225
7226         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7227
7228         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7229                 return;
7230
7231         ieee80211_scan_completed(priv->hw);
7232
7233         /* Since setting the TXPOWER may have been deferred while
7234          * performing the scan, fire one off */
7235         mutex_lock(&priv->mutex);
7236         iwl_hw_reg_send_txpower(priv);
7237         mutex_unlock(&priv->mutex);
7238 }
7239
7240 /*****************************************************************************
7241  *
7242  * mac80211 entry point functions
7243  *
7244  *****************************************************************************/
7245
7246 static int iwl_mac_start(struct ieee80211_hw *hw)
7247 {
7248         struct iwl_priv *priv = hw->priv;
7249
7250         IWL_DEBUG_MAC80211("enter\n");
7251
7252         /* we should be verifying the device is ready to be opened */
7253         mutex_lock(&priv->mutex);
7254
7255         priv->is_open = 1;
7256
7257         if (!iwl_is_rfkill(priv))
7258                 ieee80211_start_queues(priv->hw);
7259
7260         mutex_unlock(&priv->mutex);
7261         IWL_DEBUG_MAC80211("leave\n");
7262         return 0;
7263 }
7264
7265 static void iwl_mac_stop(struct ieee80211_hw *hw)
7266 {
7267         struct iwl_priv *priv = hw->priv;
7268
7269         IWL_DEBUG_MAC80211("enter\n");
7270         priv->is_open = 0;
7271         /*netif_stop_queue(dev); */
7272         flush_workqueue(priv->workqueue);
7273         IWL_DEBUG_MAC80211("leave\n");
7274 }
7275
7276 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7277                       struct ieee80211_tx_control *ctl)
7278 {
7279         struct iwl_priv *priv = hw->priv;
7280
7281         IWL_DEBUG_MAC80211("enter\n");
7282
7283         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7284                 IWL_DEBUG_MAC80211("leave - monitor\n");
7285                 return -1;
7286         }
7287
7288         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7289                      ctl->tx_rate);
7290
7291         if (iwl_tx_skb(priv, skb, ctl))
7292                 dev_kfree_skb_any(skb);
7293
7294         IWL_DEBUG_MAC80211("leave\n");
7295         return 0;
7296 }
7297
7298 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
7299                                  struct ieee80211_if_init_conf *conf)
7300 {
7301         struct iwl_priv *priv = hw->priv;
7302         unsigned long flags;
7303         DECLARE_MAC_BUF(mac);
7304
7305         IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7306         if (conf->mac_addr)
7307                 IWL_DEBUG_MAC80211("enter: MAC %s\n",
7308                                    print_mac(mac, conf->mac_addr));
7309
7310         if (priv->interface_id) {
7311                 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7312                 return 0;
7313         }
7314
7315         spin_lock_irqsave(&priv->lock, flags);
7316         priv->interface_id = conf->if_id;
7317
7318         spin_unlock_irqrestore(&priv->lock, flags);
7319
7320         mutex_lock(&priv->mutex);
7321         iwl_set_mode(priv, conf->type);
7322
7323         IWL_DEBUG_MAC80211("leave\n");
7324         mutex_unlock(&priv->mutex);
7325
7326         return 0;
7327 }
7328
7329 /**
7330  * iwl_mac_config - mac80211 config callback
7331  *
7332  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7333  * be set inappropriately and the driver currently sets the hardware up to
7334  * use it whenever needed.
7335  */
7336 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7337 {
7338         struct iwl_priv *priv = hw->priv;
7339         const struct iwl_channel_info *ch_info;
7340         unsigned long flags;
7341
7342         mutex_lock(&priv->mutex);
7343         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7344
7345         if (!iwl_is_ready(priv)) {
7346                 IWL_DEBUG_MAC80211("leave - not ready\n");
7347                 mutex_unlock(&priv->mutex);
7348                 return -EIO;
7349         }
7350
7351         /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7352          * what is exposed through include/ declrations */
7353         if (unlikely(!iwl_param_disable_hw_scan &&
7354                      test_bit(STATUS_SCANNING, &priv->status))) {
7355                 IWL_DEBUG_MAC80211("leave - scanning\n");
7356                 mutex_unlock(&priv->mutex);
7357                 return 0;
7358         }
7359
7360         spin_lock_irqsave(&priv->lock, flags);
7361
7362         ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7363         if (!is_channel_valid(ch_info)) {
7364                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7365                                conf->channel, conf->phymode);
7366                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7367                 spin_unlock_irqrestore(&priv->lock, flags);
7368                 mutex_unlock(&priv->mutex);
7369                 return -EINVAL;
7370         }
7371
7372 #ifdef CONFIG_IWLWIFI_HT
7373         /* if we are switching fron ht to 2.4 clear flags
7374          * from any ht related info since 2.4 does not
7375          * support ht */
7376         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7377 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7378             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7379 #endif
7380         )
7381                 priv->staging_rxon.flags = 0;
7382 #endif /* CONFIG_IWLWIFI_HT */
7383
7384         iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7385
7386         iwl_set_flags_for_phymode(priv, conf->phymode);
7387
7388         /* The list of supported rates and rate mask can be different
7389          * for each phymode; since the phymode may have changed, reset
7390          * the rate mask to what mac80211 lists */
7391         iwl_set_rate(priv);
7392
7393         spin_unlock_irqrestore(&priv->lock, flags);
7394
7395 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7396         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7397                 iwl_hw_channel_switch(priv, conf->channel);
7398                 mutex_unlock(&priv->mutex);
7399                 return 0;
7400         }
7401 #endif
7402
7403         iwl_radio_kill_sw(priv, !conf->radio_enabled);
7404
7405         if (!conf->radio_enabled) {
7406                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7407                 mutex_unlock(&priv->mutex);
7408                 return 0;
7409         }
7410
7411         if (iwl_is_rfkill(priv)) {
7412                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7413                 mutex_unlock(&priv->mutex);
7414                 return -EIO;
7415         }
7416
7417         iwl_set_rate(priv);
7418
7419         if (memcmp(&priv->active_rxon,
7420                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7421                 iwl_commit_rxon(priv);
7422         else
7423                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7424
7425         IWL_DEBUG_MAC80211("leave\n");
7426
7427         mutex_unlock(&priv->mutex);
7428
7429         return 0;
7430 }
7431
7432 static void iwl_config_ap(struct iwl_priv *priv)
7433 {
7434         int rc = 0;
7435
7436         if (priv->status & STATUS_EXIT_PENDING)
7437                 return;
7438
7439         /* The following should be done only at AP bring up */
7440         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7441
7442                 /* RXON - unassoc (to set timing command) */
7443                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7444                 iwl_commit_rxon(priv);
7445
7446                 /* RXON Timing */
7447                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7448                 iwl_setup_rxon_timing(priv);
7449                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7450                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7451                 if (rc)
7452                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7453                                         "Attempting to continue.\n");
7454
7455                 iwl4965_set_rxon_chain(priv);
7456
7457                 /* FIXME: what should be the assoc_id for AP? */
7458                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7459                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7460                         priv->staging_rxon.flags |=
7461                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7462                 else
7463                         priv->staging_rxon.flags &=
7464                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7465
7466                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7467                         if (priv->assoc_capability &
7468                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7469                                 priv->staging_rxon.flags |=
7470                                         RXON_FLG_SHORT_SLOT_MSK;
7471                         else
7472                                 priv->staging_rxon.flags &=
7473                                         ~RXON_FLG_SHORT_SLOT_MSK;
7474
7475                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7476                                 priv->staging_rxon.flags &=
7477                                         ~RXON_FLG_SHORT_SLOT_MSK;
7478                 }
7479                 /* restore RXON assoc */
7480                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7481                 iwl_commit_rxon(priv);
7482 #ifdef CONFIG_IWLWIFI_QOS
7483                 iwl_activate_qos(priv, 1);
7484 #endif
7485                 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7486         }
7487         iwl_send_beacon_cmd(priv);
7488
7489         /* FIXME - we need to add code here to detect a totally new
7490          * configuration, reset the AP, unassoc, rxon timing, assoc,
7491          * clear sta table, add BCAST sta... */
7492 }
7493
7494 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7495                                     struct ieee80211_if_conf *conf)
7496 {
7497         struct iwl_priv *priv = hw->priv;
7498         DECLARE_MAC_BUF(mac);
7499         unsigned long flags;
7500         int rc;
7501
7502         if (conf == NULL)
7503                 return -EIO;
7504
7505         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7506             (!conf->beacon || !conf->ssid_len)) {
7507                 IWL_DEBUG_MAC80211
7508                     ("Leaving in AP mode because HostAPD is not ready.\n");
7509                 return 0;
7510         }
7511
7512         mutex_lock(&priv->mutex);
7513
7514         IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7515         if (conf->bssid)
7516                 IWL_DEBUG_MAC80211("bssid: %s\n",
7517                                    print_mac(mac, conf->bssid));
7518
7519 /*
7520  * very dubious code was here; the probe filtering flag is never set:
7521  *
7522         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7523             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7524  */
7525         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7526                 IWL_DEBUG_MAC80211("leave - scanning\n");
7527                 mutex_unlock(&priv->mutex);
7528                 return 0;
7529         }
7530
7531         if (priv->interface_id != if_id) {
7532                 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7533                 mutex_unlock(&priv->mutex);
7534                 return 0;
7535         }
7536
7537         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7538                 if (!conf->bssid) {
7539                         conf->bssid = priv->mac_addr;
7540                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7541                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7542                                            print_mac(mac, conf->bssid));
7543                 }
7544                 if (priv->ibss_beacon)
7545                         dev_kfree_skb(priv->ibss_beacon);
7546
7547                 priv->ibss_beacon = conf->beacon;
7548         }
7549
7550         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7551             !is_multicast_ether_addr(conf->bssid)) {
7552                 /* If there is currently a HW scan going on in the background
7553                  * then we need to cancel it else the RXON below will fail. */
7554                 if (iwl_scan_cancel_timeout(priv, 100)) {
7555                         IWL_WARNING("Aborted scan still in progress "
7556                                     "after 100ms\n");
7557                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7558                         mutex_unlock(&priv->mutex);
7559                         return -EAGAIN;
7560                 }
7561                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7562
7563                 /* TODO: Audit driver for usage of these members and see
7564                  * if mac80211 deprecates them (priv->bssid looks like it
7565                  * shouldn't be there, but I haven't scanned the IBSS code
7566                  * to verify) - jpk */
7567                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7568
7569                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7570                         iwl_config_ap(priv);
7571                 else {
7572                         priv->staging_rxon.filter_flags |=
7573                                                 RXON_FILTER_ASSOC_MSK;
7574                         rc = iwl_commit_rxon(priv);
7575                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7576                                 iwl_rxon_add_station(
7577                                         priv, priv->active_rxon.bssid_addr, 1);
7578                 }
7579
7580         } else {
7581                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7582                 iwl_commit_rxon(priv);
7583         }
7584
7585         spin_lock_irqsave(&priv->lock, flags);
7586         if (!conf->ssid_len)
7587                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7588         else
7589                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7590
7591         priv->essid_len = conf->ssid_len;
7592         spin_unlock_irqrestore(&priv->lock, flags);
7593
7594         IWL_DEBUG_MAC80211("leave\n");
7595         mutex_unlock(&priv->mutex);
7596
7597         return 0;
7598 }
7599
7600 static void iwl_configure_filter(struct ieee80211_hw *hw,
7601                                  unsigned int changed_flags,
7602                                  unsigned int *total_flags,
7603                                  int mc_count, struct dev_addr_list *mc_list)
7604 {
7605         /*
7606          * XXX: dummy
7607          * see also iwl_connection_init_rx_config
7608          */
7609         *total_flags = 0;
7610 }
7611
7612 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7613                                      struct ieee80211_if_init_conf *conf)
7614 {
7615         struct iwl_priv *priv = hw->priv;
7616
7617         IWL_DEBUG_MAC80211("enter\n");
7618
7619         mutex_lock(&priv->mutex);
7620         if (priv->interface_id == conf->if_id) {
7621                 priv->interface_id = 0;
7622                 memset(priv->bssid, 0, ETH_ALEN);
7623                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7624                 priv->essid_len = 0;
7625         }
7626         mutex_unlock(&priv->mutex);
7627
7628         IWL_DEBUG_MAC80211("leave\n");
7629
7630 }
7631
7632 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7633 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7634 {
7635         int rc = 0;
7636         unsigned long flags;
7637         struct iwl_priv *priv = hw->priv;
7638
7639         IWL_DEBUG_MAC80211("enter\n");
7640
7641         spin_lock_irqsave(&priv->lock, flags);
7642
7643         if (!iwl_is_ready_rf(priv)) {
7644                 rc = -EIO;
7645                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7646                 goto out_unlock;
7647         }
7648
7649         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7650                 rc = -EIO;
7651                 IWL_ERROR("ERROR: APs don't scan\n");
7652                 goto out_unlock;
7653         }
7654
7655         /* if we just finished scan ask for delay */
7656         if (priv->last_scan_jiffies &&
7657             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7658                        jiffies)) {
7659                 rc = -EAGAIN;
7660                 goto out_unlock;
7661         }
7662         if (len) {
7663                 IWL_DEBUG_SCAN("direct scan for  "
7664                                "%s [%d]\n ",
7665                                iwl_escape_essid(ssid, len), (int)len);
7666
7667                 priv->one_direct_scan = 1;
7668                 priv->direct_ssid_len = (u8)
7669                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7670                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7671         }
7672
7673         rc = iwl_scan_initiate(priv);
7674
7675         IWL_DEBUG_MAC80211("leave\n");
7676
7677 out_unlock:
7678         spin_unlock_irqrestore(&priv->lock, flags);
7679
7680         return rc;
7681 }
7682
7683 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7684                            const u8 *local_addr, const u8 *addr,
7685                            struct ieee80211_key_conf *key)
7686 {
7687         struct iwl_priv *priv = hw->priv;
7688         DECLARE_MAC_BUF(mac);
7689         int rc = 0;
7690         u8 sta_id;
7691
7692         IWL_DEBUG_MAC80211("enter\n");
7693
7694         if (!iwl_param_hwcrypto) {
7695                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7696                 return -EOPNOTSUPP;
7697         }
7698
7699         if (is_zero_ether_addr(addr))
7700                 /* only support pairwise keys */
7701                 return -EOPNOTSUPP;
7702
7703         sta_id = iwl_hw_find_station(priv, addr);
7704         if (sta_id == IWL_INVALID_STATION) {
7705                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7706                                    print_mac(mac, addr));
7707                 return -EINVAL;
7708         }
7709
7710         mutex_lock(&priv->mutex);
7711
7712         switch (cmd) {
7713         case  SET_KEY:
7714                 rc = iwl_update_sta_key_info(priv, key, sta_id);
7715                 if (!rc) {
7716                         iwl_set_rxon_hwcrypto(priv, 1);
7717                         iwl_commit_rxon(priv);
7718                         key->hw_key_idx = sta_id;
7719                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7720                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7721                 }
7722                 break;
7723         case DISABLE_KEY:
7724                 rc = iwl_clear_sta_key_info(priv, sta_id);
7725                 if (!rc) {
7726                         iwl_set_rxon_hwcrypto(priv, 0);
7727                         iwl_commit_rxon(priv);
7728                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7729                 }
7730                 break;
7731         default:
7732                 rc = -EINVAL;
7733         }
7734
7735         IWL_DEBUG_MAC80211("leave\n");
7736         mutex_unlock(&priv->mutex);
7737
7738         return rc;
7739 }
7740
7741 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7742                            const struct ieee80211_tx_queue_params *params)
7743 {
7744         struct iwl_priv *priv = hw->priv;
7745 #ifdef CONFIG_IWLWIFI_QOS
7746         unsigned long flags;
7747         int q;
7748 #endif /* CONFIG_IWL_QOS */
7749
7750         IWL_DEBUG_MAC80211("enter\n");
7751
7752         if (!iwl_is_ready_rf(priv)) {
7753                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7754                 return -EIO;
7755         }
7756
7757         if (queue >= AC_NUM) {
7758                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7759                 return 0;
7760         }
7761
7762 #ifdef CONFIG_IWLWIFI_QOS
7763         if (!priv->qos_data.qos_enable) {
7764                 priv->qos_data.qos_active = 0;
7765                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7766                 return 0;
7767         }
7768         q = AC_NUM - 1 - queue;
7769
7770         spin_lock_irqsave(&priv->lock, flags);
7771
7772         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7773         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7774         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7775         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7776                         cpu_to_le16((params->burst_time * 100));
7777
7778         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7779         priv->qos_data.qos_active = 1;
7780
7781         spin_unlock_irqrestore(&priv->lock, flags);
7782
7783         mutex_lock(&priv->mutex);
7784         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7785                 iwl_activate_qos(priv, 1);
7786         else if (priv->assoc_id && iwl_is_associated(priv))
7787                 iwl_activate_qos(priv, 0);
7788
7789         mutex_unlock(&priv->mutex);
7790
7791 #endif /*CONFIG_IWLWIFI_QOS */
7792
7793         IWL_DEBUG_MAC80211("leave\n");
7794         return 0;
7795 }
7796
7797 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7798                                 struct ieee80211_tx_queue_stats *stats)
7799 {
7800         struct iwl_priv *priv = hw->priv;
7801         int i, avail;
7802         struct iwl_tx_queue *txq;
7803         struct iwl_queue *q;
7804         unsigned long flags;
7805
7806         IWL_DEBUG_MAC80211("enter\n");
7807
7808         if (!iwl_is_ready_rf(priv)) {
7809                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7810                 return -EIO;
7811         }
7812
7813         spin_lock_irqsave(&priv->lock, flags);
7814
7815         for (i = 0; i < AC_NUM; i++) {
7816                 txq = &priv->txq[i];
7817                 q = &txq->q;
7818                 avail = iwl_queue_space(q);
7819
7820                 stats->data[i].len = q->n_window - avail;
7821                 stats->data[i].limit = q->n_window - q->high_mark;
7822                 stats->data[i].count = q->n_window;
7823
7824         }
7825         spin_unlock_irqrestore(&priv->lock, flags);
7826
7827         IWL_DEBUG_MAC80211("leave\n");
7828
7829         return 0;
7830 }
7831
7832 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7833                              struct ieee80211_low_level_stats *stats)
7834 {
7835         IWL_DEBUG_MAC80211("enter\n");
7836         IWL_DEBUG_MAC80211("leave\n");
7837
7838         return 0;
7839 }
7840
7841 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7842 {
7843         IWL_DEBUG_MAC80211("enter\n");
7844         IWL_DEBUG_MAC80211("leave\n");
7845
7846         return 0;
7847 }
7848
7849 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7850 {
7851         struct iwl_priv *priv = hw->priv;
7852         unsigned long flags;
7853
7854         mutex_lock(&priv->mutex);
7855         IWL_DEBUG_MAC80211("enter\n");
7856
7857         priv->lq_mngr.lq_ready = 0;
7858 #ifdef CONFIG_IWLWIFI_HT
7859         spin_lock_irqsave(&priv->lock, flags);
7860         memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
7861         spin_unlock_irqrestore(&priv->lock, flags);
7862 #ifdef CONFIG_IWLWIFI_HT_AGG
7863 /*      if (priv->lq_mngr.agg_ctrl.granted_ba)
7864                 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
7865
7866         memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl_agg_control));
7867         priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
7868         priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
7869         priv->lq_mngr.agg_ctrl.auto_agg = 1;
7870
7871         if (priv->lq_mngr.agg_ctrl.auto_agg)
7872                 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
7873 #endif /*CONFIG_IWLWIFI_HT_AGG */
7874 #endif /* CONFIG_IWLWIFI_HT */
7875
7876 #ifdef CONFIG_IWLWIFI_QOS
7877         iwl_reset_qos(priv);
7878 #endif
7879
7880         cancel_delayed_work(&priv->post_associate);
7881
7882         spin_lock_irqsave(&priv->lock, flags);
7883         priv->assoc_id = 0;
7884         priv->assoc_capability = 0;
7885         priv->call_post_assoc_from_beacon = 0;
7886         priv->assoc_station_added = 0;
7887
7888         /* new association get rid of ibss beacon skb */
7889         if (priv->ibss_beacon)
7890                 dev_kfree_skb(priv->ibss_beacon);
7891
7892         priv->ibss_beacon = NULL;
7893
7894         priv->beacon_int = priv->hw->conf.beacon_int;
7895         priv->timestamp1 = 0;
7896         priv->timestamp0 = 0;
7897         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7898                 priv->beacon_int = 0;
7899
7900         spin_unlock_irqrestore(&priv->lock, flags);
7901
7902         /* Per mac80211.h: This is only used in IBSS mode... */
7903         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7904                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7905                 mutex_unlock(&priv->mutex);
7906                 return;
7907         }
7908
7909         if (!iwl_is_ready_rf(priv)) {
7910                 IWL_DEBUG_MAC80211("leave - not ready\n");
7911                 mutex_unlock(&priv->mutex);
7912                 return;
7913         }
7914
7915         priv->only_active_channel = 0;
7916
7917         iwl_set_rate(priv);
7918
7919         mutex_unlock(&priv->mutex);
7920
7921         IWL_DEBUG_MAC80211("leave\n");
7922
7923 }
7924
7925 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7926                                  struct ieee80211_tx_control *control)
7927 {
7928         struct iwl_priv *priv = hw->priv;
7929         unsigned long flags;
7930
7931         mutex_lock(&priv->mutex);
7932         IWL_DEBUG_MAC80211("enter\n");
7933
7934         if (!iwl_is_ready_rf(priv)) {
7935                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7936                 mutex_unlock(&priv->mutex);
7937                 return -EIO;
7938         }
7939
7940         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7941                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7942                 mutex_unlock(&priv->mutex);
7943                 return -EIO;
7944         }
7945
7946         spin_lock_irqsave(&priv->lock, flags);
7947
7948         if (priv->ibss_beacon)
7949                 dev_kfree_skb(priv->ibss_beacon);
7950
7951         priv->ibss_beacon = skb;
7952
7953         priv->assoc_id = 0;
7954
7955         IWL_DEBUG_MAC80211("leave\n");
7956         spin_unlock_irqrestore(&priv->lock, flags);
7957
7958 #ifdef CONFIG_IWLWIFI_QOS
7959         iwl_reset_qos(priv);
7960 #endif
7961
7962         queue_work(priv->workqueue, &priv->post_associate.work);
7963
7964         mutex_unlock(&priv->mutex);
7965
7966         return 0;
7967 }
7968
7969 #ifdef CONFIG_IWLWIFI_HT
7970 union ht_cap_info {
7971         struct {
7972                 u16 advanced_coding_cap         :1;
7973                 u16 supported_chan_width_set    :1;
7974                 u16 mimo_power_save_mode        :2;
7975                 u16 green_field                 :1;
7976                 u16 short_GI20                  :1;
7977                 u16 short_GI40                  :1;
7978                 u16 tx_stbc                     :1;
7979                 u16 rx_stbc                     :1;
7980                 u16 beam_forming                :1;
7981                 u16 delayed_ba                  :1;
7982                 u16 maximal_amsdu_size          :1;
7983                 u16 cck_mode_at_40MHz           :1;
7984                 u16 psmp_support                :1;
7985                 u16 stbc_ctrl_frame_support     :1;
7986                 u16 sig_txop_protection_support :1;
7987         };
7988         u16 val;
7989 } __attribute__ ((packed));
7990
7991 union ht_param_info{
7992         struct {
7993                 u8 max_rx_ampdu_factor  :2;
7994                 u8 mpdu_density         :3;
7995                 u8 reserved             :3;
7996         };
7997         u8 val;
7998 } __attribute__ ((packed));
7999
8000 union ht_exra_param_info {
8001         struct {
8002                 u8 ext_chan_offset              :2;
8003                 u8 tx_chan_width                :1;
8004                 u8 rifs_mode                    :1;
8005                 u8 controlled_access_only       :1;
8006                 u8 service_interval_granularity :3;
8007         };
8008         u8 val;
8009 } __attribute__ ((packed));
8010
8011 union ht_operation_mode{
8012         struct {
8013                 u16 op_mode     :2;
8014                 u16 non_GF      :1;
8015                 u16 reserved    :13;
8016         };
8017         u16 val;
8018 } __attribute__ ((packed));
8019
8020
8021 static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
8022                             struct ieee80211_ht_additional_info *ht_extra,
8023                             struct sta_ht_info *ht_info_ap,
8024                             struct sta_ht_info *ht_info)
8025 {
8026         union ht_cap_info cap;
8027         union ht_operation_mode op_mode;
8028         union ht_param_info param_info;
8029         union ht_exra_param_info extra_param_info;
8030
8031         IWL_DEBUG_MAC80211("enter: \n");
8032
8033         if (!ht_info) {
8034                 IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
8035                 return -1;
8036         }
8037
8038         if (ht_cap) {
8039                 cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
8040                 param_info.val = ht_cap->mac_ht_params_info;
8041                 ht_info->is_ht = 1;
8042                 if (cap.short_GI20)
8043                         ht_info->sgf |= 0x1;
8044                 if (cap.short_GI40)
8045                         ht_info->sgf |= 0x2;
8046                 ht_info->is_green_field = cap.green_field;
8047                 ht_info->max_amsdu_size = cap.maximal_amsdu_size;
8048                 ht_info->supported_chan_width = cap.supported_chan_width_set;
8049                 ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
8050                 memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
8051
8052                 ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
8053                 ht_info->mpdu_density = param_info.mpdu_density;
8054
8055                 IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
8056                                     ht_cap->supported_mcs_set[0],
8057                                     ht_cap->supported_mcs_set[1]);
8058
8059                 if (ht_info_ap) {
8060                         ht_info->control_channel = ht_info_ap->control_channel;
8061                         ht_info->extension_chan_offset =
8062                                 ht_info_ap->extension_chan_offset;
8063                         ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
8064                         ht_info->operating_mode = ht_info_ap->operating_mode;
8065                 }
8066
8067                 if (ht_extra) {
8068                         extra_param_info.val = ht_extra->ht_param;
8069                         ht_info->control_channel = ht_extra->control_chan;
8070                         ht_info->extension_chan_offset =
8071                             extra_param_info.ext_chan_offset;
8072                         ht_info->tx_chan_width = extra_param_info.tx_chan_width;
8073                         op_mode.val = (u16)
8074                             le16_to_cpu(ht_extra->operation_mode);
8075                         ht_info->operating_mode = op_mode.op_mode;
8076                         IWL_DEBUG_MAC80211("control channel %d\n",
8077                                             ht_extra->control_chan);
8078                 }
8079         } else
8080                 ht_info->is_ht = 0;
8081
8082         IWL_DEBUG_MAC80211("leave\n");
8083         return 0;
8084 }
8085
8086 static int iwl_mac_conf_ht(struct ieee80211_hw *hw,
8087                            struct ieee80211_ht_capability *ht_cap,
8088                            struct ieee80211_ht_additional_info *ht_extra)
8089 {
8090         struct iwl_priv *priv = hw->priv;
8091         int rs;
8092
8093         IWL_DEBUG_MAC80211("enter: \n");
8094
8095         rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
8096         iwl4965_set_rxon_chain(priv);
8097
8098         if (priv && priv->assoc_id &&
8099             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8100                 unsigned long flags;
8101
8102                 spin_lock_irqsave(&priv->lock, flags);
8103                 if (priv->beacon_int)
8104                         queue_work(priv->workqueue, &priv->post_associate.work);
8105                 else
8106                         priv->call_post_assoc_from_beacon = 1;
8107                 spin_unlock_irqrestore(&priv->lock, flags);
8108         }
8109
8110         IWL_DEBUG_MAC80211("leave: control channel %d\n",
8111                         ht_extra->control_chan);
8112         return rs;
8113
8114 }
8115
8116 static void iwl_set_ht_capab(struct ieee80211_hw *hw,
8117                              struct ieee80211_ht_capability *ht_cap,
8118                              u8 use_wide_chan)
8119 {
8120         union ht_cap_info cap;
8121         union ht_param_info param_info;
8122
8123         memset(&cap, 0, sizeof(union ht_cap_info));
8124         memset(&param_info, 0, sizeof(union ht_param_info));
8125
8126         cap.maximal_amsdu_size = HT_IE_MAX_AMSDU_SIZE_4K;
8127         cap.green_field = 1;
8128         cap.short_GI20 = 1;
8129         cap.short_GI40 = 1;
8130         cap.supported_chan_width_set = use_wide_chan;
8131         cap.mimo_power_save_mode = 0x3;
8132
8133         param_info.max_rx_ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
8134         param_info.mpdu_density = CFG_HT_MPDU_DENSITY_DEF;
8135         ht_cap->capabilities_info = (__le16) cpu_to_le16(cap.val);
8136         ht_cap->mac_ht_params_info = (u8) param_info.val;
8137
8138         ht_cap->supported_mcs_set[0] = 0xff;
8139         ht_cap->supported_mcs_set[1] = 0xff;
8140         ht_cap->supported_mcs_set[4] =
8141             (cap.supported_chan_width_set) ? 0x1: 0x0;
8142 }
8143
8144 static void iwl_mac_get_ht_capab(struct ieee80211_hw *hw,
8145                                  struct ieee80211_ht_capability *ht_cap)
8146 {
8147         u8 use_wide_channel = 1;
8148         struct iwl_priv *priv = hw->priv;
8149
8150         IWL_DEBUG_MAC80211("enter: \n");
8151         if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
8152                 use_wide_channel = 0;
8153
8154         /* no fat tx allowed on 2.4GHZ */
8155         if (priv->phymode != MODE_IEEE80211A)
8156                 use_wide_channel = 0;
8157
8158         iwl_set_ht_capab(hw, ht_cap, use_wide_channel);
8159         IWL_DEBUG_MAC80211("leave: \n");
8160 }
8161 #endif /*CONFIG_IWLWIFI_HT*/
8162
8163 /*****************************************************************************
8164  *
8165  * sysfs attributes
8166  *
8167  *****************************************************************************/
8168
8169 #ifdef CONFIG_IWLWIFI_DEBUG
8170
8171 /*
8172  * The following adds a new attribute to the sysfs representation
8173  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8174  * used for controlling the debug level.
8175  *
8176  * See the level definitions in iwl for details.
8177  */
8178
8179 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8180 {
8181         return sprintf(buf, "0x%08X\n", iwl_debug_level);
8182 }
8183 static ssize_t store_debug_level(struct device_driver *d,
8184                                  const char *buf, size_t count)
8185 {
8186         char *p = (char *)buf;
8187         u32 val;
8188
8189         val = simple_strtoul(p, &p, 0);
8190         if (p == buf)
8191                 printk(KERN_INFO DRV_NAME
8192                        ": %s is not in hex or decimal form.\n", buf);
8193         else
8194                 iwl_debug_level = val;
8195
8196         return strnlen(buf, count);
8197 }
8198
8199 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8200                    show_debug_level, store_debug_level);
8201
8202 #endif /* CONFIG_IWLWIFI_DEBUG */
8203
8204 static ssize_t show_rf_kill(struct device *d,
8205                             struct device_attribute *attr, char *buf)
8206 {
8207         /*
8208          * 0 - RF kill not enabled
8209          * 1 - SW based RF kill active (sysfs)
8210          * 2 - HW based RF kill active
8211          * 3 - Both HW and SW based RF kill active
8212          */
8213         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8214         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8215                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8216
8217         return sprintf(buf, "%i\n", val);
8218 }
8219
8220 static ssize_t store_rf_kill(struct device *d,
8221                              struct device_attribute *attr,
8222                              const char *buf, size_t count)
8223 {
8224         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8225
8226         mutex_lock(&priv->mutex);
8227         iwl_radio_kill_sw(priv, buf[0] == '1');
8228         mutex_unlock(&priv->mutex);
8229
8230         return count;
8231 }
8232
8233 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8234
8235 static ssize_t show_temperature(struct device *d,
8236                                 struct device_attribute *attr, char *buf)
8237 {
8238         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8239
8240         if (!iwl_is_alive(priv))
8241                 return -EAGAIN;
8242
8243         return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
8244 }
8245
8246 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8247
8248 static ssize_t show_rs_window(struct device *d,
8249                               struct device_attribute *attr,
8250                               char *buf)
8251 {
8252         struct iwl_priv *priv = d->driver_data;
8253         return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8254 }
8255 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8256
8257 static ssize_t show_tx_power(struct device *d,
8258                              struct device_attribute *attr, char *buf)
8259 {
8260         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8261         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8262 }
8263
8264 static ssize_t store_tx_power(struct device *d,
8265                               struct device_attribute *attr,
8266                               const char *buf, size_t count)
8267 {
8268         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8269         char *p = (char *)buf;
8270         u32 val;
8271
8272         val = simple_strtoul(p, &p, 10);
8273         if (p == buf)
8274                 printk(KERN_INFO DRV_NAME
8275                        ": %s is not in decimal form.\n", buf);
8276         else
8277                 iwl_hw_reg_set_txpower(priv, val);
8278
8279         return count;
8280 }
8281
8282 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8283
8284 static ssize_t show_flags(struct device *d,
8285                           struct device_attribute *attr, char *buf)
8286 {
8287         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8288
8289         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8290 }
8291
8292 static ssize_t store_flags(struct device *d,
8293                            struct device_attribute *attr,
8294                            const char *buf, size_t count)
8295 {
8296         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8297         u32 flags = simple_strtoul(buf, NULL, 0);
8298
8299         mutex_lock(&priv->mutex);
8300         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8301                 /* Cancel any currently running scans... */
8302                 if (iwl_scan_cancel_timeout(priv, 100))
8303                         IWL_WARNING("Could not cancel scan.\n");
8304                 else {
8305                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8306                                        flags);
8307                         priv->staging_rxon.flags = cpu_to_le32(flags);
8308                         iwl_commit_rxon(priv);
8309                 }
8310         }
8311         mutex_unlock(&priv->mutex);
8312
8313         return count;
8314 }
8315
8316 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8317
8318 static ssize_t show_filter_flags(struct device *d,
8319                                  struct device_attribute *attr, char *buf)
8320 {
8321         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8322
8323         return sprintf(buf, "0x%04X\n",
8324                 le32_to_cpu(priv->active_rxon.filter_flags));
8325 }
8326
8327 static ssize_t store_filter_flags(struct device *d,
8328                                   struct device_attribute *attr,
8329                                   const char *buf, size_t count)
8330 {
8331         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8332         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8333
8334         mutex_lock(&priv->mutex);
8335         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8336                 /* Cancel any currently running scans... */
8337                 if (iwl_scan_cancel_timeout(priv, 100))
8338                         IWL_WARNING("Could not cancel scan.\n");
8339                 else {
8340                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8341                                        "0x%04X\n", filter_flags);
8342                         priv->staging_rxon.filter_flags =
8343                                 cpu_to_le32(filter_flags);
8344                         iwl_commit_rxon(priv);
8345                 }
8346         }
8347         mutex_unlock(&priv->mutex);
8348
8349         return count;
8350 }
8351
8352 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8353                    store_filter_flags);
8354
8355 static ssize_t show_tune(struct device *d,
8356                          struct device_attribute *attr, char *buf)
8357 {
8358         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8359
8360         return sprintf(buf, "0x%04X\n",
8361                        (priv->phymode << 8) |
8362                         le16_to_cpu(priv->active_rxon.channel));
8363 }
8364
8365 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
8366
8367 static ssize_t store_tune(struct device *d,
8368                           struct device_attribute *attr,
8369                           const char *buf, size_t count)
8370 {
8371         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8372         char *p = (char *)buf;
8373         u16 tune = simple_strtoul(p, &p, 0);
8374         u8 phymode = (tune >> 8) & 0xff;
8375         u16 channel = tune & 0xff;
8376
8377         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8378
8379         mutex_lock(&priv->mutex);
8380         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8381             (priv->phymode != phymode)) {
8382                 const struct iwl_channel_info *ch_info;
8383
8384                 ch_info = iwl_get_channel_info(priv, phymode, channel);
8385                 if (!ch_info) {
8386                         IWL_WARNING("Requested invalid phymode/channel "
8387                                     "combination: %d %d\n", phymode, channel);
8388                         mutex_unlock(&priv->mutex);
8389                         return -EINVAL;
8390                 }
8391
8392                 /* Cancel any currently running scans... */
8393                 if (iwl_scan_cancel_timeout(priv, 100))
8394                         IWL_WARNING("Could not cancel scan.\n");
8395                 else {
8396                         IWL_DEBUG_INFO("Committing phymode and "
8397                                        "rxon.channel = %d %d\n",
8398                                        phymode, channel);
8399
8400                         iwl_set_rxon_channel(priv, phymode, channel);
8401                         iwl_set_flags_for_phymode(priv, phymode);
8402
8403                         iwl_set_rate(priv);
8404                         iwl_commit_rxon(priv);
8405                 }
8406         }
8407         mutex_unlock(&priv->mutex);
8408
8409         return count;
8410 }
8411
8412 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8413
8414 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8415
8416 static ssize_t show_measurement(struct device *d,
8417                                 struct device_attribute *attr, char *buf)
8418 {
8419         struct iwl_priv *priv = dev_get_drvdata(d);
8420         struct iwl_spectrum_notification measure_report;
8421         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8422         u8 *data = (u8 *) & measure_report;
8423         unsigned long flags;
8424
8425         spin_lock_irqsave(&priv->lock, flags);
8426         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8427                 spin_unlock_irqrestore(&priv->lock, flags);
8428                 return 0;
8429         }
8430         memcpy(&measure_report, &priv->measure_report, size);
8431         priv->measurement_status = 0;
8432         spin_unlock_irqrestore(&priv->lock, flags);
8433
8434         while (size && (PAGE_SIZE - len)) {
8435                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8436                                    PAGE_SIZE - len, 1);
8437                 len = strlen(buf);
8438                 if (PAGE_SIZE - len)
8439                         buf[len++] = '\n';
8440
8441                 ofs += 16;
8442                 size -= min(size, 16U);
8443         }
8444
8445         return len;
8446 }
8447
8448 static ssize_t store_measurement(struct device *d,
8449                                  struct device_attribute *attr,
8450                                  const char *buf, size_t count)
8451 {
8452         struct iwl_priv *priv = dev_get_drvdata(d);
8453         struct ieee80211_measurement_params params = {
8454                 .channel = le16_to_cpu(priv->active_rxon.channel),
8455                 .start_time = cpu_to_le64(priv->last_tsf),
8456                 .duration = cpu_to_le16(1),
8457         };
8458         u8 type = IWL_MEASURE_BASIC;
8459         u8 buffer[32];
8460         u8 channel;
8461
8462         if (count) {
8463                 char *p = buffer;
8464                 strncpy(buffer, buf, min(sizeof(buffer), count));
8465                 channel = simple_strtoul(p, NULL, 0);
8466                 if (channel)
8467                         params.channel = channel;
8468
8469                 p = buffer;
8470                 while (*p && *p != ' ')
8471                         p++;
8472                 if (*p)
8473                         type = simple_strtoul(p + 1, NULL, 0);
8474         }
8475
8476         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8477                        "channel %d (for '%s')\n", type, params.channel, buf);
8478         iwl_get_measurement(priv, &params, type);
8479
8480         return count;
8481 }
8482
8483 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8484                    show_measurement, store_measurement);
8485 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
8486
8487 static ssize_t store_retry_rate(struct device *d,
8488                                 struct device_attribute *attr,
8489                                 const char *buf, size_t count)
8490 {
8491         struct iwl_priv *priv = dev_get_drvdata(d);
8492
8493         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8494         if (priv->retry_rate <= 0)
8495                 priv->retry_rate = 1;
8496
8497         return count;
8498 }
8499
8500 static ssize_t show_retry_rate(struct device *d,
8501                                struct device_attribute *attr, char *buf)
8502 {
8503         struct iwl_priv *priv = dev_get_drvdata(d);
8504         return sprintf(buf, "%d", priv->retry_rate);
8505 }
8506
8507 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8508                    store_retry_rate);
8509
8510 static ssize_t store_power_level(struct device *d,
8511                                  struct device_attribute *attr,
8512                                  const char *buf, size_t count)
8513 {
8514         struct iwl_priv *priv = dev_get_drvdata(d);
8515         int rc;
8516         int mode;
8517
8518         mode = simple_strtoul(buf, NULL, 0);
8519         mutex_lock(&priv->mutex);
8520
8521         if (!iwl_is_ready(priv)) {
8522                 rc = -EAGAIN;
8523                 goto out;
8524         }
8525
8526         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8527                 mode = IWL_POWER_AC;
8528         else
8529                 mode |= IWL_POWER_ENABLED;
8530
8531         if (mode != priv->power_mode) {
8532                 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8533                 if (rc) {
8534                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8535                         goto out;
8536                 }
8537                 priv->power_mode = mode;
8538         }
8539
8540         rc = count;
8541
8542  out:
8543         mutex_unlock(&priv->mutex);
8544         return rc;
8545 }
8546
8547 #define MAX_WX_STRING 80
8548
8549 /* Values are in microsecond */
8550 static const s32 timeout_duration[] = {
8551         350000,
8552         250000,
8553         75000,
8554         37000,
8555         25000,
8556 };
8557 static const s32 period_duration[] = {
8558         400000,
8559         700000,
8560         1000000,
8561         1000000,
8562         1000000
8563 };
8564
8565 static ssize_t show_power_level(struct device *d,
8566                                 struct device_attribute *attr, char *buf)
8567 {
8568         struct iwl_priv *priv = dev_get_drvdata(d);
8569         int level = IWL_POWER_LEVEL(priv->power_mode);
8570         char *p = buf;
8571
8572         p += sprintf(p, "%d ", level);
8573         switch (level) {
8574         case IWL_POWER_MODE_CAM:
8575         case IWL_POWER_AC:
8576                 p += sprintf(p, "(AC)");
8577                 break;
8578         case IWL_POWER_BATTERY:
8579                 p += sprintf(p, "(BATTERY)");
8580                 break;
8581         default:
8582                 p += sprintf(p,
8583                              "(Timeout %dms, Period %dms)",
8584                              timeout_duration[level - 1] / 1000,
8585                              period_duration[level - 1] / 1000);
8586         }
8587
8588         if (!(priv->power_mode & IWL_POWER_ENABLED))
8589                 p += sprintf(p, " OFF\n");
8590         else
8591                 p += sprintf(p, " \n");
8592
8593         return (p - buf + 1);
8594
8595 }
8596
8597 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8598                    store_power_level);
8599
8600 static ssize_t show_channels(struct device *d,
8601                              struct device_attribute *attr, char *buf)
8602 {
8603         struct iwl_priv *priv = dev_get_drvdata(d);
8604         int len = 0, i;
8605         struct ieee80211_channel *channels = NULL;
8606         const struct ieee80211_hw_mode *hw_mode = NULL;
8607         int count = 0;
8608
8609         if (!iwl_is_ready(priv))
8610                 return -EAGAIN;
8611
8612         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8613         if (!hw_mode)
8614                 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8615         if (hw_mode) {
8616                 channels = hw_mode->channels;
8617                 count = hw_mode->num_channels;
8618         }
8619
8620         len +=
8621             sprintf(&buf[len],
8622                     "Displaying %d channels in 2.4GHz band "
8623                     "(802.11bg):\n", count);
8624
8625         for (i = 0; i < count; i++)
8626                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8627                                channels[i].chan,
8628                                channels[i].power_level,
8629                                channels[i].
8630                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8631                                " (IEEE 802.11h required)" : "",
8632                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8633                                 || (channels[i].
8634                                     flag &
8635                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8636                                ", IBSS",
8637                                channels[i].
8638                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8639                                "active/passive" : "passive only");
8640
8641         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8642         if (hw_mode) {
8643                 channels = hw_mode->channels;
8644                 count = hw_mode->num_channels;
8645         } else {
8646                 channels = NULL;
8647                 count = 0;
8648         }
8649
8650         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8651                        "(802.11a):\n", count);
8652
8653         for (i = 0; i < count; i++)
8654                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8655                                channels[i].chan,
8656                                channels[i].power_level,
8657                                channels[i].
8658                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8659                                " (IEEE 802.11h required)" : "",
8660                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8661                                 || (channels[i].
8662                                     flag &
8663                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8664                                ", IBSS",
8665                                channels[i].
8666                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8667                                "active/passive" : "passive only");
8668
8669         return len;
8670 }
8671
8672 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8673
8674 static ssize_t show_statistics(struct device *d,
8675                                struct device_attribute *attr, char *buf)
8676 {
8677         struct iwl_priv *priv = dev_get_drvdata(d);
8678         u32 size = sizeof(struct iwl_notif_statistics);
8679         u32 len = 0, ofs = 0;
8680         u8 *data = (u8 *) & priv->statistics;
8681         int rc = 0;
8682
8683         if (!iwl_is_alive(priv))
8684                 return -EAGAIN;
8685
8686         mutex_lock(&priv->mutex);
8687         rc = iwl_send_statistics_request(priv);
8688         mutex_unlock(&priv->mutex);
8689
8690         if (rc) {
8691                 len = sprintf(buf,
8692                               "Error sending statistics request: 0x%08X\n", rc);
8693                 return len;
8694         }
8695
8696         while (size && (PAGE_SIZE - len)) {
8697                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8698                                    PAGE_SIZE - len, 1);
8699                 len = strlen(buf);
8700                 if (PAGE_SIZE - len)
8701                         buf[len++] = '\n';
8702
8703                 ofs += 16;
8704                 size -= min(size, 16U);
8705         }
8706
8707         return len;
8708 }
8709
8710 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8711
8712 static ssize_t show_antenna(struct device *d,
8713                             struct device_attribute *attr, char *buf)
8714 {
8715         struct iwl_priv *priv = dev_get_drvdata(d);
8716
8717         if (!iwl_is_alive(priv))
8718                 return -EAGAIN;
8719
8720         return sprintf(buf, "%d\n", priv->antenna);
8721 }
8722
8723 static ssize_t store_antenna(struct device *d,
8724                              struct device_attribute *attr,
8725                              const char *buf, size_t count)
8726 {
8727         int ant;
8728         struct iwl_priv *priv = dev_get_drvdata(d);
8729
8730         if (count == 0)
8731                 return 0;
8732
8733         if (sscanf(buf, "%1i", &ant) != 1) {
8734                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8735                 return count;
8736         }
8737
8738         if ((ant >= 0) && (ant <= 2)) {
8739                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8740                 priv->antenna = (enum iwl_antenna)ant;
8741         } else
8742                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8743
8744
8745         return count;
8746 }
8747
8748 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8749
8750 static ssize_t show_status(struct device *d,
8751                            struct device_attribute *attr, char *buf)
8752 {
8753         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8754         if (!iwl_is_alive(priv))
8755                 return -EAGAIN;
8756         return sprintf(buf, "0x%08x\n", (int)priv->status);
8757 }
8758
8759 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8760
8761 static ssize_t dump_error_log(struct device *d,
8762                               struct device_attribute *attr,
8763                               const char *buf, size_t count)
8764 {
8765         char *p = (char *)buf;
8766
8767         if (p[0] == '1')
8768                 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8769
8770         return strnlen(buf, count);
8771 }
8772
8773 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8774
8775 static ssize_t dump_event_log(struct device *d,
8776                               struct device_attribute *attr,
8777                               const char *buf, size_t count)
8778 {
8779         char *p = (char *)buf;
8780
8781         if (p[0] == '1')
8782                 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8783
8784         return strnlen(buf, count);
8785 }
8786
8787 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8788
8789 /*****************************************************************************
8790  *
8791  * driver setup and teardown
8792  *
8793  *****************************************************************************/
8794
8795 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8796 {
8797         priv->workqueue = create_workqueue(DRV_NAME);
8798
8799         init_waitqueue_head(&priv->wait_command_queue);
8800
8801         INIT_WORK(&priv->up, iwl_bg_up);
8802         INIT_WORK(&priv->restart, iwl_bg_restart);
8803         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8804         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8805         INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8806         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8807         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8808         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8809         INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8810         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8811         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8812         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8813
8814         iwl_hw_setup_deferred_work(priv);
8815
8816         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8817                      iwl_irq_tasklet, (unsigned long)priv);
8818 }
8819
8820 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8821 {
8822         iwl_hw_cancel_deferred_work(priv);
8823
8824         cancel_delayed_work(&priv->scan_check);
8825         cancel_delayed_work(&priv->alive_start);
8826         cancel_delayed_work(&priv->post_associate);
8827         cancel_work_sync(&priv->beacon_update);
8828 }
8829
8830 static struct attribute *iwl_sysfs_entries[] = {
8831         &dev_attr_antenna.attr,
8832         &dev_attr_channels.attr,
8833         &dev_attr_dump_errors.attr,
8834         &dev_attr_dump_events.attr,
8835         &dev_attr_flags.attr,
8836         &dev_attr_filter_flags.attr,
8837 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8838         &dev_attr_measurement.attr,
8839 #endif
8840         &dev_attr_power_level.attr,
8841         &dev_attr_retry_rate.attr,
8842         &dev_attr_rf_kill.attr,
8843         &dev_attr_rs_window.attr,
8844         &dev_attr_statistics.attr,
8845         &dev_attr_status.attr,
8846         &dev_attr_temperature.attr,
8847         &dev_attr_tune.attr,
8848         &dev_attr_tx_power.attr,
8849
8850         NULL
8851 };
8852
8853 static struct attribute_group iwl_attribute_group = {
8854         .name = NULL,           /* put in device directory */
8855         .attrs = iwl_sysfs_entries,
8856 };
8857
8858 static struct ieee80211_ops iwl_hw_ops = {
8859         .tx = iwl_mac_tx,
8860         .start = iwl_mac_start,
8861         .stop = iwl_mac_stop,
8862         .add_interface = iwl_mac_add_interface,
8863         .remove_interface = iwl_mac_remove_interface,
8864         .config = iwl_mac_config,
8865         .config_interface = iwl_mac_config_interface,
8866         .configure_filter = iwl_configure_filter,
8867         .set_key = iwl_mac_set_key,
8868         .get_stats = iwl_mac_get_stats,
8869         .get_tx_stats = iwl_mac_get_tx_stats,
8870         .conf_tx = iwl_mac_conf_tx,
8871         .get_tsf = iwl_mac_get_tsf,
8872         .reset_tsf = iwl_mac_reset_tsf,
8873         .beacon_update = iwl_mac_beacon_update,
8874 #ifdef CONFIG_IWLWIFI_HT
8875         .conf_ht = iwl_mac_conf_ht,
8876         .get_ht_capab = iwl_mac_get_ht_capab,
8877 #ifdef CONFIG_IWLWIFI_HT_AGG
8878         .ht_tx_agg_start = iwl_mac_ht_tx_agg_start,
8879         .ht_tx_agg_stop = iwl_mac_ht_tx_agg_stop,
8880         .ht_rx_agg_start = iwl_mac_ht_rx_agg_start,
8881         .ht_rx_agg_stop = iwl_mac_ht_rx_agg_stop,
8882 #endif  /* CONFIG_IWLWIFI_HT_AGG */
8883 #endif  /* CONFIG_IWLWIFI_HT */
8884         .hw_scan = iwl_mac_hw_scan
8885 };
8886
8887 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8888 {
8889         int err = 0;
8890         struct iwl_priv *priv;
8891         struct ieee80211_hw *hw;
8892         int i;
8893
8894         if (iwl_param_disable_hw_scan) {
8895                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8896                 iwl_hw_ops.hw_scan = NULL;
8897         }
8898
8899         if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8900             (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8901                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8902                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8903                 err = -EINVAL;
8904                 goto out;
8905         }
8906
8907         /* mac80211 allocates memory for this device instance, including
8908          *   space for this driver's private structure */
8909         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8910         if (hw == NULL) {
8911                 IWL_ERROR("Can not allocate network device\n");
8912                 err = -ENOMEM;
8913                 goto out;
8914         }
8915         SET_IEEE80211_DEV(hw, &pdev->dev);
8916
8917         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8918         priv = hw->priv;
8919         priv->hw = hw;
8920
8921         priv->pci_dev = pdev;
8922         priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8923 #ifdef CONFIG_IWLWIFI_DEBUG
8924         iwl_debug_level = iwl_param_debug;
8925         atomic_set(&priv->restrict_refcnt, 0);
8926 #endif
8927         priv->retry_rate = 1;
8928
8929         priv->ibss_beacon = NULL;
8930
8931         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8932          *   the range of signal quality values that we'll provide.
8933          * Negative values for level/noise indicate that we'll provide dBm.
8934          * For WE, at least, non-0 values here *enable* display of values
8935          *   in app (iwconfig). */
8936         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8937         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8938         hw->max_signal = 100;   /* link quality indication (%) */
8939
8940         /* Tell mac80211 our Tx characteristics */
8941         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8942
8943         hw->queues = 4;
8944 #ifdef CONFIG_IWLWIFI_HT
8945 #ifdef CONFIG_IWLWIFI_HT_AGG
8946         hw->queues = 16;
8947 #endif /* CONFIG_IWLWIFI_HT_AGG */
8948 #endif /* CONFIG_IWLWIFI_HT */
8949
8950         spin_lock_init(&priv->lock);
8951         spin_lock_init(&priv->power_data.lock);
8952         spin_lock_init(&priv->sta_lock);
8953         spin_lock_init(&priv->hcmd_lock);
8954         spin_lock_init(&priv->lq_mngr.lock);
8955
8956         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8957                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8958
8959         INIT_LIST_HEAD(&priv->free_frames);
8960
8961         mutex_init(&priv->mutex);
8962         if (pci_enable_device(pdev)) {
8963                 err = -ENODEV;
8964                 goto out_ieee80211_free_hw;
8965         }
8966
8967         pci_set_master(pdev);
8968
8969         iwl_clear_stations_table(priv);
8970
8971         priv->data_retry_limit = -1;
8972         priv->ieee_channels = NULL;
8973         priv->ieee_rates = NULL;
8974         priv->phymode = -1;
8975
8976         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8977         if (!err)
8978                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8979         if (err) {
8980                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8981                 goto out_pci_disable_device;
8982         }
8983
8984         pci_set_drvdata(pdev, priv);
8985         err = pci_request_regions(pdev, DRV_NAME);
8986         if (err)
8987                 goto out_pci_disable_device;
8988         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8989          * PCI Tx retries from interfering with C3 CPU state */
8990         pci_write_config_byte(pdev, 0x41, 0x00);
8991         priv->hw_base = pci_iomap(pdev, 0, 0);
8992         if (!priv->hw_base) {
8993                 err = -ENODEV;
8994                 goto out_pci_release_regions;
8995         }
8996
8997         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8998                         (unsigned long long) pci_resource_len(pdev, 0));
8999         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9000
9001         /* Initialize module parameter values here */
9002
9003         if (iwl_param_disable) {
9004                 set_bit(STATUS_RF_KILL_SW, &priv->status);
9005                 IWL_DEBUG_INFO("Radio disabled.\n");
9006         }
9007
9008         priv->iw_mode = IEEE80211_IF_TYPE_STA;
9009
9010         priv->ps_mode = 0;
9011         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9012         priv->is_ht_enabled = 1;
9013         priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
9014         priv->valid_antenna = 0x7;      /* assume all 3 connected */
9015         priv->ps_mode = IWL_MIMO_PS_NONE;
9016         priv->cck_power_index_compensation = iwl_read32(
9017                 priv, CSR_HW_REV_WA_REG);
9018
9019         iwl4965_set_rxon_chain(priv);
9020
9021         printk(KERN_INFO DRV_NAME
9022                ": Detected Intel Wireless WiFi Link 4965AGN\n");
9023
9024         /* Device-specific setup */
9025         if (iwl_hw_set_hw_setting(priv)) {
9026                 IWL_ERROR("failed to set hw settings\n");
9027                 mutex_unlock(&priv->mutex);
9028                 goto out_iounmap;
9029         }
9030
9031 #ifdef CONFIG_IWLWIFI_QOS
9032         if (iwl_param_qos_enable)
9033                 priv->qos_data.qos_enable = 1;
9034
9035         iwl_reset_qos(priv);
9036
9037         priv->qos_data.qos_active = 0;
9038         priv->qos_data.qos_cap.val = 0;
9039 #endif /* CONFIG_IWLWIFI_QOS */
9040
9041         iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9042         iwl_setup_deferred_work(priv);
9043         iwl_setup_rx_handlers(priv);
9044
9045         priv->rates_mask = IWL_RATES_MASK;
9046         /* If power management is turned on, default to AC mode */
9047         priv->power_mode = IWL_POWER_AC;
9048         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9049
9050         pci_enable_msi(pdev);
9051
9052         err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
9053         if (err) {
9054                 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
9055                 goto out_disable_msi;
9056         }
9057
9058         mutex_lock(&priv->mutex);
9059
9060         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
9061         if (err) {
9062                 IWL_ERROR("failed to create sysfs device attributes\n");
9063                 mutex_unlock(&priv->mutex);
9064                 goto out_release_irq;
9065         }
9066
9067         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
9068          * ucode filename and max sizes are card-specific. */
9069         err = iwl_read_ucode(priv);
9070         if (err) {
9071                 IWL_ERROR("Could not read microcode: %d\n", err);
9072                 mutex_unlock(&priv->mutex);
9073                 goto out_pci_alloc;
9074         }
9075
9076         mutex_unlock(&priv->mutex);
9077
9078         IWL_DEBUG_INFO("Queing UP work.\n");
9079
9080         queue_work(priv->workqueue, &priv->up);
9081
9082         return 0;
9083
9084  out_pci_alloc:
9085         iwl_dealloc_ucode_pci(priv);
9086
9087         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9088
9089  out_release_irq:
9090         free_irq(pdev->irq, priv);
9091
9092  out_disable_msi:
9093         pci_disable_msi(pdev);
9094         destroy_workqueue(priv->workqueue);
9095         priv->workqueue = NULL;
9096         iwl_unset_hw_setting(priv);
9097
9098  out_iounmap:
9099         pci_iounmap(pdev, priv->hw_base);
9100  out_pci_release_regions:
9101         pci_release_regions(pdev);
9102  out_pci_disable_device:
9103         pci_disable_device(pdev);
9104         pci_set_drvdata(pdev, NULL);
9105  out_ieee80211_free_hw:
9106         ieee80211_free_hw(priv->hw);
9107  out:
9108         return err;
9109 }
9110
9111 static void iwl_pci_remove(struct pci_dev *pdev)
9112 {
9113         struct iwl_priv *priv = pci_get_drvdata(pdev);
9114         struct list_head *p, *q;
9115         int i;
9116
9117         if (!priv)
9118                 return;
9119
9120         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9121
9122         mutex_lock(&priv->mutex);
9123         set_bit(STATUS_EXIT_PENDING, &priv->status);
9124         __iwl_down(priv);
9125         mutex_unlock(&priv->mutex);
9126
9127         /* Free MAC hash list for ADHOC */
9128         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9129                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9130                         list_del(p);
9131                         kfree(list_entry(p, struct iwl_ibss_seq, list));
9132                 }
9133         }
9134
9135         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9136
9137         iwl_dealloc_ucode_pci(priv);
9138
9139         if (priv->rxq.bd)
9140                 iwl_rx_queue_free(priv, &priv->rxq);
9141         iwl_hw_txq_ctx_free(priv);
9142
9143         iwl_unset_hw_setting(priv);
9144         iwl_clear_stations_table(priv);
9145
9146         if (priv->mac80211_registered) {
9147                 ieee80211_unregister_hw(priv->hw);
9148                 iwl_rate_control_unregister(priv->hw);
9149         }
9150
9151         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
9152          * priv->workqueue... so we can't take down the workqueue
9153          * until now... */
9154         destroy_workqueue(priv->workqueue);
9155         priv->workqueue = NULL;
9156
9157         free_irq(pdev->irq, priv);
9158         pci_disable_msi(pdev);
9159         pci_iounmap(pdev, priv->hw_base);
9160         pci_release_regions(pdev);
9161         pci_disable_device(pdev);
9162         pci_set_drvdata(pdev, NULL);
9163
9164         kfree(priv->channel_info);
9165
9166         kfree(priv->ieee_channels);
9167         kfree(priv->ieee_rates);
9168
9169         if (priv->ibss_beacon)
9170                 dev_kfree_skb(priv->ibss_beacon);
9171
9172         ieee80211_free_hw(priv->hw);
9173 }
9174
9175 #ifdef CONFIG_PM
9176
9177 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9178 {
9179         struct iwl_priv *priv = pci_get_drvdata(pdev);
9180
9181         mutex_lock(&priv->mutex);
9182
9183         set_bit(STATUS_IN_SUSPEND, &priv->status);
9184
9185         /* Take down the device; powers it off, etc. */
9186         __iwl_down(priv);
9187
9188         if (priv->mac80211_registered)
9189                 ieee80211_stop_queues(priv->hw);
9190
9191         pci_save_state(pdev);
9192         pci_disable_device(pdev);
9193         pci_set_power_state(pdev, PCI_D3hot);
9194
9195         mutex_unlock(&priv->mutex);
9196
9197         return 0;
9198 }
9199
9200 static void iwl_resume(struct iwl_priv *priv)
9201 {
9202         unsigned long flags;
9203
9204         /* The following it a temporary work around due to the
9205          * suspend / resume not fully initializing the NIC correctly.
9206          * Without all of the following, resume will not attempt to take
9207          * down the NIC (it shouldn't really need to) and will just try
9208          * and bring the NIC back up.  However that fails during the
9209          * ucode verification process.  This then causes iwl_down to be
9210          * called *after* iwl_hw_nic_init() has succeeded -- which
9211          * then lets the next init sequence succeed.  So, we've
9212          * replicated all of that NIC init code here... */
9213
9214         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9215
9216         iwl_hw_nic_init(priv);
9217
9218         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9219         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
9220                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
9221         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9222         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9223         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9224
9225         /* tell the device to stop sending interrupts */
9226         iwl_disable_interrupts(priv);
9227
9228         spin_lock_irqsave(&priv->lock, flags);
9229         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
9230
9231         if (!iwl_grab_restricted_access(priv)) {
9232                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
9233                                          APMG_CLK_VAL_DMA_CLK_RQT);
9234                 iwl_release_restricted_access(priv);
9235         }
9236         spin_unlock_irqrestore(&priv->lock, flags);
9237
9238         udelay(5);
9239
9240         iwl_hw_nic_reset(priv);
9241
9242         /* Bring the device back up */
9243         clear_bit(STATUS_IN_SUSPEND, &priv->status);
9244         queue_work(priv->workqueue, &priv->up);
9245 }
9246
9247 static int iwl_pci_resume(struct pci_dev *pdev)
9248 {
9249         struct iwl_priv *priv = pci_get_drvdata(pdev);
9250         int err;
9251
9252         printk(KERN_INFO "Coming out of suspend...\n");
9253
9254         mutex_lock(&priv->mutex);
9255
9256         pci_set_power_state(pdev, PCI_D0);
9257         err = pci_enable_device(pdev);
9258         pci_restore_state(pdev);
9259
9260         /*
9261          * Suspend/Resume resets the PCI configuration space, so we have to
9262          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
9263          * from interfering with C3 CPU state. pci_restore_state won't help
9264          * here since it only restores the first 64 bytes pci config header.
9265          */
9266         pci_write_config_byte(pdev, 0x41, 0x00);
9267
9268         iwl_resume(priv);
9269         mutex_unlock(&priv->mutex);
9270
9271         return 0;
9272 }
9273
9274 #endif /* CONFIG_PM */
9275
9276 /*****************************************************************************
9277  *
9278  * driver and module entry point
9279  *
9280  *****************************************************************************/
9281
9282 static struct pci_driver iwl_driver = {
9283         .name = DRV_NAME,
9284         .id_table = iwl_hw_card_ids,
9285         .probe = iwl_pci_probe,
9286         .remove = __devexit_p(iwl_pci_remove),
9287 #ifdef CONFIG_PM
9288         .suspend = iwl_pci_suspend,
9289         .resume = iwl_pci_resume,
9290 #endif
9291 };
9292
9293 static int __init iwl_init(void)
9294 {
9295
9296         int ret;
9297         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9298         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9299         ret = pci_register_driver(&iwl_driver);
9300         if (ret) {
9301                 IWL_ERROR("Unable to initialize PCI module\n");
9302                 return ret;
9303         }
9304 #ifdef CONFIG_IWLWIFI_DEBUG
9305         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
9306         if (ret) {
9307                 IWL_ERROR("Unable to create driver sysfs file\n");
9308                 pci_unregister_driver(&iwl_driver);
9309                 return ret;
9310         }
9311 #endif
9312
9313         return ret;
9314 }
9315
9316 static void __exit iwl_exit(void)
9317 {
9318 #ifdef CONFIG_IWLWIFI_DEBUG
9319         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
9320 #endif
9321         pci_unregister_driver(&iwl_driver);
9322 }
9323
9324 module_param_named(antenna, iwl_param_antenna, int, 0444);
9325 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9326 module_param_named(disable, iwl_param_disable, int, 0444);
9327 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9328 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
9329 MODULE_PARM_DESC(hwcrypto,
9330                  "using hardware crypto engine (default 0 [software])\n");
9331 module_param_named(debug, iwl_param_debug, int, 0444);
9332 MODULE_PARM_DESC(debug, "debug output mask");
9333 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
9334 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9335
9336 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
9337 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9338
9339 /* QoS */
9340 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
9341 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9342
9343 module_exit(iwl_exit);
9344 module_init(iwl_init);