drivers/net/wireless/iwlwifi/iwl3945-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 3945
  62
  63 #include "iwlwifi.h"
  64 #include "iwl-3945.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 \
  92 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  93
  94 #ifdef CONFIG_IWLWIFI_DEBUG
  95 #define VD "d"
  96 #else
  97 #define VD
  98 #endif
  99
 100 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
 101 #define VS "s"
 102 #else
 103 #define VS
 104 #endif
 105
 106 #define IWLWIFI_VERSION "0.1.15k" VD VS
 107 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
 108 #define DRV_VERSION     IWLWIFI_VERSION
 109
 110 /* Change firmware file name, using "-" and incrementing number,
 111  *   *only* when uCode interface or architecture changes so that it
 112  *   is not compatible with earlier drivers.
 113  * This number will also appear in << 8 position of 1st dword of uCode file */
 114 #define IWL3945_UCODE_API "-1"
 115
 116 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 117 MODULE_VERSION(DRV_VERSION);
 118 MODULE_AUTHOR(DRV_COPYRIGHT);
 119 MODULE_LICENSE("GPL");
 120
 121 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 122 {
 123         u16 fc = le16_to_cpu(hdr->frame_control);
 124         int hdr_len = ieee80211_get_hdrlen(fc);
 125
 126         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 127                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 128         return NULL;
 129 }
 130
 131 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
 132                 struct iwl_priv *priv, int mode)
 133 {
 134         int i;
 135
 136         for (i = 0; i < 3; i++)
 137                 if (priv->modes[i].mode == mode)
 138                         return &priv->modes[i];
 139
 140         return NULL;
 141 }
 142
 143 static int iwl_is_empty_essid(const char *essid, int essid_len)
 144 {
 145         /* Single white space is for Linksys APs */
 146         if (essid_len == 1 && essid[0] == ' ')
 147                 return 1;
 148
 149         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 150         while (essid_len) {
 151                 essid_len--;
 152                 if (essid[essid_len] != '\0')
 153                         return 0;
 154         }
 155
 156         return 1;
 157 }
 158
 159 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
 160 {
 161         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 162         const char *s = essid;
 163         char *d = escaped;
 164
 165         if (iwl_is_empty_essid(essid, essid_len)) {
 166                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 167                 return escaped;
 168         }
 169
 170         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 171         while (essid_len--) {
 172                 if (*s == '\0') {
 173                         *d++ = '\\';
 174                         *d++ = '0';
 175                         s++;
 176                 } else
 177                         *d++ = *s++;
 178         }
 179         *d = '\0';
 180         return escaped;
 181 }
 182
 183 static void iwl_print_hex_dump(int level, void *p, u32 len)
 184 {
 185 #ifdef CONFIG_IWLWIFI_DEBUG
 186         if (!(iwl_debug_level & level))
 187                 return;
 188
 189         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 190                         p, len, 1);
 191 #endif
 192 }
 193
 194 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 195  * DMA services
 196  *
 197  * Theory of operation
 198  *
 199  * A queue is a circular buffers with 'Read' and 'Write' pointers.
 200  * 2 empty entries always kept in the buffer to protect from overflow.
 201  *
 202  * For Tx queue, there are low mark and high mark limits. If, after queuing
 203  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 204  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 205  * Tx queue resumed.
 206  *
 207  * The IWL operates with six queues, one receive queue in the device's
 208  * sram, one transmit queue for sending commands to the device firmware,
 209  * and four transmit queues for data.
 210  ***************************************************/
 211
 212 static int iwl_queue_space(const struct iwl_queue *q)
 213 {
 214         int s = q->last_used - q->first_empty;
 215
 216         if (q->last_used > q->first_empty)
 217                 s -= q->n_bd;
 218
 219         if (s <= 0)
 220                 s += q->n_window;
 221         /* keep some reserve to not confuse empty and full situations */
 222         s -= 2;
 223         if (s < 0)
 224                 s = 0;
 225         return s;
 226 }
 227
 228 /* XXX: n_bd must be power-of-two size */
 229 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 230 {
 231         return ++index & (n_bd - 1);
 232 }
 233
 234 /* XXX: n_bd must be power-of-two size */
 235 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 236 {
 237         return --index & (n_bd - 1);
 238 }
 239
 240 static inline int x2_queue_used(const struct iwl_queue *q, int i)
 241 {
 242         return q->first_empty > q->last_used ?
 243                 (i >= q->last_used && i < q->first_empty) :
 244                 !(i < q->last_used && i >= q->first_empty);
 245 }
 246
 247 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
 248 {
 249         if (is_huge)
 250                 return q->n_window;
 251
 252         return index & (q->n_window - 1);
 253 }
 254
 255 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
 256                           int count, int slots_num, u32 id)
 257 {
 258         q->n_bd = count;
 259         q->n_window = slots_num;
 260         q->id = id;
 261
 262         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 263          * and iwl_queue_dec_wrap are broken. */
 264         BUG_ON(!is_power_of_2(count));
 265
 266         /* slots_num must be power-of-two size, otherwise
 267          * get_cmd_index is broken. */
 268         BUG_ON(!is_power_of_2(slots_num));
 269
 270         q->low_mark = q->n_window / 4;
 271         if (q->low_mark < 4)
 272                 q->low_mark = 4;
 273
 274         q->high_mark = q->n_window / 8;
 275         if (q->high_mark < 2)
 276                 q->high_mark = 2;
 277
 278         q->first_empty = q->last_used = 0;
 279
 280         return 0;
 281 }
 282
 283 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
 284                               struct iwl_tx_queue *txq, u32 id)
 285 {
 286         struct pci_dev *dev = priv->pci_dev;
 287
 288         if (id != IWL_CMD_QUEUE_NUM) {
 289                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 290                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 291                 if (!txq->txb) {
 292                         IWL_ERROR("kmalloc for auxilary BD "
 293                                   "structures failed\n");
 294                         goto error;
 295                 }
 296         } else
 297                 txq->txb = NULL;
 298
 299         txq->bd = pci_alloc_consistent(dev,
 300                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 301                         &txq->q.dma_addr);
 302
 303         if (!txq->bd) {
 304                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 305                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 306                 goto error;
 307         }
 308         txq->q.id = id;
 309
 310         return 0;
 311
 312  error:
 313         if (txq->txb) {
 314                 kfree(txq->txb);
 315                 txq->txb = NULL;
 316         }
 317
 318         return -ENOMEM;
 319 }
 320
 321 int iwl_tx_queue_init(struct iwl_priv *priv,
 322                       struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
 323 {
 324         struct pci_dev *dev = priv->pci_dev;
 325         int len;
 326         int rc = 0;
 327
 328         /* alocate command space + one big command for scan since scan
 329          * command is very huge the system will not have two scan at the
 330          * same time */
 331         len = sizeof(struct iwl_cmd) * slots_num;
 332         if (txq_id == IWL_CMD_QUEUE_NUM)
 333                 len +=  IWL_MAX_SCAN_SIZE;
 334         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 335         if (!txq->cmd)
 336                 return -ENOMEM;
 337
 338         rc = iwl_tx_queue_alloc(priv, txq, txq_id);
 339         if (rc) {
 340                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 341
 342                 return -ENOMEM;
 343         }
 344         txq->need_update = 0;
 345
 346         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 347          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 348         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 349         iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 350
 351         iwl_hw_tx_queue_init(priv, txq);
 352
 353         return 0;
 354 }
 355
 356 /**
 357  * iwl_tx_queue_free - Deallocate DMA queue.
 358  * @txq: Transmit queue to deallocate.
 359  *
 360  * Empty queue by removing and destroying all BD's.
 361  * Free all buffers.  txq itself is not freed.
 362  *
 363  */
 364 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 365 {
 366         struct iwl_queue *q = &txq->q;
 367         struct pci_dev *dev = priv->pci_dev;
 368         int len;
 369
 370         if (q->n_bd == 0)
 371                 return;
 372
 373         /* first, empty all BD's */
 374         for (; q->first_empty != q->last_used;
 375              q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
 376                 iwl_hw_txq_free_tfd(priv, txq);
 377
 378         len = sizeof(struct iwl_cmd) * q->n_window;
 379         if (q->id == IWL_CMD_QUEUE_NUM)
 380                 len += IWL_MAX_SCAN_SIZE;
 381
 382         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 383
 384         /* free buffers belonging to queue itself */
 385         if (txq->q.n_bd)
 386                 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
 387                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 388
 389         if (txq->txb) {
 390                 kfree(txq->txb);
 391                 txq->txb = NULL;
 392         }
 393
 394         /* 0 fill whole structure */
 395         memset(txq, 0, sizeof(*txq));
 396 }
 397
 398 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 399
 400 /*************** STATION TABLE MANAGEMENT ****
 401  *
 402  * NOTE:  This needs to be overhauled to better synchronize between
 403  * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
 404  *
 405  * mac80211 should also be examined to determine if sta_info is duplicating
 406  * the functionality provided here
 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 static void iwl_clear_stations_table(struct iwl_priv *priv)
 448 {
 449         unsigned long flags;
 450
 451         spin_lock_irqsave(&priv->sta_lock, flags);
 452
 453         priv->num_stations = 0;
 454         memset(priv->stations, 0, sizeof(priv->stations));
 455
 456         spin_unlock_irqrestore(&priv->sta_lock, flags);
 457 }
 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         u8 rate;
 468
 469         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 470         if (is_ap)
 471                 index = IWL_AP_ID;
 472         else if (is_broadcast_ether_addr(addr))
 473                 index = priv->hw_setting.bcast_sta_id;
 474         else
 475                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 476                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 477                                                 addr)) {
 478                                 index = i;
 479                                 break;
 480                         }
 481
 482                         if (!priv->stations[i].used &&
 483                             index == IWL_INVALID_STATION)
 484                                 index = i;
 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         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 501         station = &priv->stations[index];
 502         station->used = 1;
 503         priv->num_stations++;
 504
 505         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 506         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 507         station->sta.mode = 0;
 508         station->sta.sta.sta_id = index;
 509         station->sta.station_flags = 0;
 510
 511         rate = (priv->phymode == MODE_IEEE80211A) ? IWL_RATE_6M_PLCP :
 512                                 IWL_RATE_1M_PLCP | priv->hw_setting.cck_flag;
 513
 514         /* Turn on both antennas for the station... */
 515         station->sta.rate_n_flags =
 516                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 517         station->current_rate.rate_n_flags =
 518                         le16_to_cpu(station->sta.rate_n_flags);
 519
 520         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 521         iwl_send_add_station(priv, &station->sta, flags);
 522         return index;
 523
 524 }
 525
 526 /*************** DRIVER STATUS FUNCTIONS   *****/
 527
 528 static inline int iwl_is_ready(struct iwl_priv *priv)
 529 {
 530         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 531          * set but EXIT_PENDING is not */
 532         return test_bit(STATUS_READY, &priv->status) &&
 533                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 534                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 535 }
 536
 537 static inline int iwl_is_alive(struct iwl_priv *priv)
 538 {
 539         return test_bit(STATUS_ALIVE, &priv->status);
 540 }
 541
 542 static inline int iwl_is_init(struct iwl_priv *priv)
 543 {
 544         return test_bit(STATUS_INIT, &priv->status);
 545 }
 546
 547 static inline int iwl_is_rfkill(struct iwl_priv *priv)
 548 {
 549         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 550                test_bit(STATUS_RF_KILL_SW, &priv->status);
 551 }
 552
 553 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
 554 {
 555
 556         if (iwl_is_rfkill(priv))
 557                 return 0;
 558
 559         return iwl_is_ready(priv);
 560 }
 561
 562 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 563
 564 #define IWL_CMD(x) case x : return #x
 565
 566 static const char *get_cmd_string(u8 cmd)
 567 {
 568         switch (cmd) {
 569                 IWL_CMD(REPLY_ALIVE);
 570                 IWL_CMD(REPLY_ERROR);
 571                 IWL_CMD(REPLY_RXON);
 572                 IWL_CMD(REPLY_RXON_ASSOC);
 573                 IWL_CMD(REPLY_QOS_PARAM);
 574                 IWL_CMD(REPLY_RXON_TIMING);
 575                 IWL_CMD(REPLY_ADD_STA);
 576                 IWL_CMD(REPLY_REMOVE_STA);
 577                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 578                 IWL_CMD(REPLY_3945_RX);
 579                 IWL_CMD(REPLY_TX);
 580                 IWL_CMD(REPLY_RATE_SCALE);
 581                 IWL_CMD(REPLY_LEDS_CMD);
 582                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 583                 IWL_CMD(RADAR_NOTIFICATION);
 584                 IWL_CMD(REPLY_QUIET_CMD);
 585                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 586                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 587                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 588                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 589                 IWL_CMD(POWER_TABLE_CMD);
 590                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 591                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 592                 IWL_CMD(REPLY_SCAN_CMD);
 593                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 594                 IWL_CMD(SCAN_START_NOTIFICATION);
 595                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 596                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 597                 IWL_CMD(BEACON_NOTIFICATION);
 598                 IWL_CMD(REPLY_TX_BEACON);
 599                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 600                 IWL_CMD(QUIET_NOTIFICATION);
 601                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 602                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 603                 IWL_CMD(REPLY_BT_CONFIG);
 604                 IWL_CMD(REPLY_STATISTICS_CMD);
 605                 IWL_CMD(STATISTICS_NOTIFICATION);
 606                 IWL_CMD(REPLY_CARD_STATE_CMD);
 607                 IWL_CMD(CARD_STATE_NOTIFICATION);
 608                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 609         default:
 610                 return "UNKNOWN";
 611
 612         }
 613 }
 614
 615 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 616
 617 /**
 618  * iwl_enqueue_hcmd - enqueue a uCode command
 619  * @priv: device private data point
 620  * @cmd: a point to the ucode command structure
 621  *
 622  * The function returns < 0 values to indicate the operation is
 623  * failed. On success, it turns the index (> 0) of command in the
 624  * command queue.
 625  */
 626 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 627 {
 628         struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 629         struct iwl_queue *q = &txq->q;
 630         struct iwl_tfd_frame *tfd;
 631         u32 *control_flags;
 632         struct iwl_cmd *out_cmd;
 633         u32 idx;
 634         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 635         dma_addr_t phys_addr;
 636         int pad;
 637         u16 count;
 638         int ret;
 639         unsigned long flags;
 640
 641         /* If any of the command structures end up being larger than
 642          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 643          * we will need to increase the size of the TFD entries */
 644         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 645                !(cmd->meta.flags & CMD_SIZE_HUGE));
 646
 647         if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 648                 IWL_ERROR("No space for Tx\n");
 649                 return -ENOSPC;
 650         }
 651
 652         spin_lock_irqsave(&priv->hcmd_lock, flags);
 653
 654         tfd = &txq->bd[q->first_empty];
 655         memset(tfd, 0, sizeof(*tfd));
 656
 657         control_flags = (u32 *) tfd;
 658
 659         idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
 660         out_cmd = &txq->cmd[idx];
 661
 662         out_cmd->hdr.cmd = cmd->id;
 663         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 664         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 665
 666         /* At this point, the out_cmd now has all of the incoming cmd
 667          * information */
 668
 669         out_cmd->hdr.flags = 0;
 670         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 671                         INDEX_TO_SEQ(q->first_empty));
 672         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 673                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 674
 675         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 676                         offsetof(struct iwl_cmd, hdr);
 677         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 678
 679         pad = U32_PAD(cmd->len);
 680         count = TFD_CTL_COUNT_GET(*control_flags);
 681         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 682
 683         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 684                      "%d bytes at %d[%d]:%d\n",
 685                      get_cmd_string(out_cmd->hdr.cmd),
 686                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 687                      fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
 688
 689         txq->need_update = 1;
 690         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
 691         ret = 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_set_rxon_channel - Set the phymode and channel values in staging RXON
 850  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 851  * @channel: Any channel valid for the requested phymode
 852
 853  * In addition to setting the staging RXON, priv->phymode is also set.
 854  *
 855  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 856  * in the staging RXON flag structure based on the phymode
 857  */
 858 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
 859 {
 860         if (!iwl_get_channel_info(priv, phymode, channel)) {
 861                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 862                                channel, phymode);
 863                 return -EINVAL;
 864         }
 865
 866         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 867             (priv->phymode == phymode))
 868                 return 0;
 869
 870         priv->staging_rxon.channel = cpu_to_le16(channel);
 871         if (phymode == MODE_IEEE80211A)
 872                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 873         else
 874                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 875
 876         priv->phymode = phymode;
 877
 878         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 879
 880         return 0;
 881 }
 882
 883 /**
 884  * iwl_check_rxon_cmd - validate RXON structure is valid
 885  *
 886  * NOTE:  This is really only useful during development and can eventually
 887  * be #ifdef'd out once the driver is stable and folks aren't actively
 888  * making changes
 889  */
 890 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 891 {
 892         int error = 0;
 893         int counter = 1;
 894
 895         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 896                 error |= le32_to_cpu(rxon->flags &
 897                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 898                                  RXON_FLG_RADAR_DETECT_MSK));
 899                 if (error)
 900                         IWL_WARNING("check 24G fields %d | %d\n",
 901                                     counter++, error);
 902         } else {
 903                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 904                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 905                 if (error)
 906                         IWL_WARNING("check 52 fields %d | %d\n",
 907                                     counter++, error);
 908                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 909                 if (error)
 910                         IWL_WARNING("check 52 CCK %d | %d\n",
 911                                     counter++, error);
 912         }
 913         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 914         if (error)
 915                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 916
 917         /* make sure basic rates 6Mbps and 1Mbps are supported */
 918         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 919                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 920         if (error)
 921                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 922
 923         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 924         if (error)
 925                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 926
 927         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 928                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 929         if (error)
 930                 IWL_WARNING("check CCK and short slot %d | %d\n",
 931                             counter++, error);
 932
 933         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 934                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 935         if (error)
 936                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 937                             counter++, error);
 938
 939         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 940                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 941         if (error)
 942                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 943                             counter++, error);
 944
 945         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 946                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 947                                 RXON_FLG_ANT_A_MSK)) == 0);
 948         if (error)
 949                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 950
 951         if (error)
 952                 IWL_WARNING("Tuning to channel %d\n",
 953                             le16_to_cpu(rxon->channel));
 954
 955         if (error) {
 956                 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
 957                 return -1;
 958         }
 959         return 0;
 960 }
 961
 962 /**
 963  * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
 964  * @priv: staging_rxon is comapred to active_rxon
 965  *
 966  * If the RXON structure is changing sufficient to require a new
 967  * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
 968  * to indicate a new tune is required.
 969  */
 970 static int iwl_full_rxon_required(struct iwl_priv *priv)
 971 {
 972
 973         /* These items are only settable from the full RXON command */
 974         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 975             compare_ether_addr(priv->staging_rxon.bssid_addr,
 976                                priv->active_rxon.bssid_addr) ||
 977             compare_ether_addr(priv->staging_rxon.node_addr,
 978                                priv->active_rxon.node_addr) ||
 979             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 980                                priv->active_rxon.wlap_bssid_addr) ||
 981             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 982             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 983             (priv->staging_rxon.air_propagation !=
 984              priv->active_rxon.air_propagation) ||
 985             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 986                 return 1;
 987
 988         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 989          * be updated with the RXON_ASSOC command -- however only some
 990          * flag transitions are allowed using RXON_ASSOC */
 991
 992         /* Check if we are not switching bands */
 993         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 994             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 995                 return 1;
 996
 997         /* Check if we are switching association toggle */
 998         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 999                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1000                 return 1;
1001
1002         return 0;
1003 }
1004
1005 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1006 {
1007         int rc = 0;
1008         struct iwl_rx_packet *res = NULL;
1009         struct iwl_rxon_assoc_cmd rxon_assoc;
1010         struct iwl_host_cmd cmd = {
1011                 .id = REPLY_RXON_ASSOC,
1012                 .len = sizeof(rxon_assoc),
1013                 .meta.flags = CMD_WANT_SKB,
1014                 .data = &rxon_assoc,
1015         };
1016         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1017         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1018
1019         if ((rxon1->flags == rxon2->flags) &&
1020             (rxon1->filter_flags == rxon2->filter_flags) &&
1021             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1022             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1023                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1024                 return 0;
1025         }
1026
1027         rxon_assoc.flags = priv->staging_rxon.flags;
1028         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1029         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1030         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1031         rxon_assoc.reserved = 0;
1032
1033         rc = iwl_send_cmd_sync(priv, &cmd);
1034         if (rc)
1035                 return rc;
1036
1037         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1038         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1039                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1040                 rc = -EIO;
1041         }
1042
1043         priv->alloc_rxb_skb--;
1044         dev_kfree_skb_any(cmd.meta.u.skb);
1045
1046         return rc;
1047 }
1048
1049 /**
1050  * iwl_commit_rxon - commit staging_rxon to hardware
1051  *
1052  * The RXON command in staging_rxon is commited to the hardware and
1053  * the active_rxon structure is updated with the new data.  This
1054  * function correctly transitions out of the RXON_ASSOC_MSK state if
1055  * a HW tune is required based on the RXON structure changes.
1056  */
1057 static int iwl_commit_rxon(struct iwl_priv *priv)
1058 {
1059         /* cast away the const for active_rxon in this function */
1060         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1061         int rc = 0;
1062         DECLARE_MAC_BUF(mac);
1063
1064         if (!iwl_is_alive(priv))
1065                 return -1;
1066
1067         /* always get timestamp with Rx frame */
1068         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1069
1070         /* select antenna */
1071         priv->staging_rxon.flags &=
1072             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1073         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1074
1075         rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1076         if (rc) {
1077                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1078                 return -EINVAL;
1079         }
1080
1081         /* If we don't need to send a full RXON, we can use
1082          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1083          * and other flags for the current radio configuration. */
1084         if (!iwl_full_rxon_required(priv)) {
1085                 rc = iwl_send_rxon_assoc(priv);
1086                 if (rc) {
1087                         IWL_ERROR("Error setting RXON_ASSOC "
1088                                   "configuration (%d).\n", rc);
1089                         return rc;
1090                 }
1091
1092                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1093
1094                 return 0;
1095         }
1096
1097         /* If we are currently associated and the new config requires
1098          * an RXON_ASSOC and the new config wants the associated mask enabled,
1099          * we must clear the associated from the active configuration
1100          * before we apply the new config */
1101         if (iwl_is_associated(priv) &&
1102             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1103                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1104                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1105
1106                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1107                                       sizeof(struct iwl_rxon_cmd),
1108                                       &priv->active_rxon);
1109
1110                 /* If the mask clearing failed then we set
1111                  * active_rxon back to what it was previously */
1112                 if (rc) {
1113                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1114                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1115                                   "configuration (%d).\n", rc);
1116                         return rc;
1117                 }
1118         }
1119
1120         IWL_DEBUG_INFO("Sending RXON\n"
1121                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1122                        "* channel = %d\n"
1123                        "* bssid = %s\n",
1124                        ((priv->staging_rxon.filter_flags &
1125                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1126                        le16_to_cpu(priv->staging_rxon.channel),
1127                        print_mac(mac, priv->staging_rxon.bssid_addr));
1128
1129         /* Apply the new configuration */
1130         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1131                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1132         if (rc) {
1133                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1134                 return rc;
1135         }
1136
1137         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1138
1139         iwl_clear_stations_table(priv);
1140
1141         /* If we issue a new RXON command which required a tune then we must
1142          * send a new TXPOWER command or we won't be able to Tx any frames */
1143         rc = iwl_hw_reg_send_txpower(priv);
1144         if (rc) {
1145                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1146                 return rc;
1147         }
1148
1149         /* Add the broadcast address so we can send broadcast frames */
1150         if (iwl_add_station(priv, BROADCAST_ADDR, 0, 0) ==
1151             IWL_INVALID_STATION) {
1152                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1153                 return -EIO;
1154         }
1155
1156         /* If we have set the ASSOC_MSK and we are in BSS mode then
1157          * add the IWL_AP_ID to the station rate table */
1158         if (iwl_is_associated(priv) &&
1159             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
1160                 if (iwl_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1161                     == IWL_INVALID_STATION) {
1162                         IWL_ERROR("Error adding AP address for transmit.\n");
1163                         return -EIO;
1164                 }
1165
1166         /* Init the hardware's rate fallback order based on the
1167          * phymode */
1168         rc = iwl3945_init_hw_rate_table(priv);
1169         if (rc) {
1170                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1171                 return -EIO;
1172         }
1173
1174         return 0;
1175 }
1176
1177 static int iwl_send_bt_config(struct iwl_priv *priv)
1178 {
1179         struct iwl_bt_cmd bt_cmd = {
1180                 .flags = 3,
1181                 .lead_time = 0xAA,
1182                 .max_kill = 1,
1183                 .kill_ack_mask = 0,
1184                 .kill_cts_mask = 0,
1185         };
1186
1187         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1188                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1189 }
1190
1191 static int iwl_send_scan_abort(struct iwl_priv *priv)
1192 {
1193         int rc = 0;
1194         struct iwl_rx_packet *res;
1195         struct iwl_host_cmd cmd = {
1196                 .id = REPLY_SCAN_ABORT_CMD,
1197                 .meta.flags = CMD_WANT_SKB,
1198         };
1199
1200         /* If there isn't a scan actively going on in the hardware
1201          * then we are in between scan bands and not actually
1202          * actively scanning, so don't send the abort command */
1203         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1204                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1205                 return 0;
1206         }
1207
1208         rc = iwl_send_cmd_sync(priv, &cmd);
1209         if (rc) {
1210                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1211                 return rc;
1212         }
1213
1214         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1215         if (res->u.status != CAN_ABORT_STATUS) {
1216                 /* The scan abort will return 1 for success or
1217                  * 2 for "failure".  A failure condition can be
1218                  * due to simply not being in an active scan which
1219                  * can occur if we send the scan abort before we
1220                  * the microcode has notified us that a scan is
1221                  * completed. */
1222                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1223                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1224                 clear_bit(STATUS_SCAN_HW, &priv->status);
1225         }
1226
1227         dev_kfree_skb_any(cmd.meta.u.skb);
1228
1229         return rc;
1230 }
1231
1232 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1233                                         struct iwl_cmd *cmd,
1234                                         struct sk_buff *skb)
1235 {
1236         return 1;
1237 }
1238
1239 /*
1240  * CARD_STATE_CMD
1241  *
1242  * Use: Sets the internal card state to enable, disable, or halt
1243  *
1244  * When in the 'enable' state the card operates as normal.
1245  * When in the 'disable' state, the card enters into a low power mode.
1246  * When in the 'halt' state, the card is shut down and must be fully
1247  * restarted to come back on.
1248  */
1249 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1250 {
1251         struct iwl_host_cmd cmd = {
1252                 .id = REPLY_CARD_STATE_CMD,
1253                 .len = sizeof(u32),
1254                 .data = &flags,
1255                 .meta.flags = meta_flag,
1256         };
1257
1258         if (meta_flag & CMD_ASYNC)
1259                 cmd.meta.u.callback = iwl_card_state_sync_callback;
1260
1261         return iwl_send_cmd(priv, &cmd);
1262 }
1263
1264 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1265                                      struct iwl_cmd *cmd, struct sk_buff *skb)
1266 {
1267         struct iwl_rx_packet *res = NULL;
1268
1269         if (!skb) {
1270                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1271                 return 1;
1272         }
1273
1274         res = (struct iwl_rx_packet *)skb->data;
1275         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1276                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1277                           res->hdr.flags);
1278                 return 1;
1279         }
1280
1281         switch (res->u.add_sta.status) {
1282         case ADD_STA_SUCCESS_MSK:
1283                 break;
1284         default:
1285                 break;
1286         }
1287
1288         /* We didn't cache the SKB; let the caller free it */
1289         return 1;
1290 }
1291
1292 int iwl_send_add_station(struct iwl_priv *priv,
1293                          struct iwl_addsta_cmd *sta, u8 flags)
1294 {
1295         struct iwl_rx_packet *res = NULL;
1296         int rc = 0;
1297         struct iwl_host_cmd cmd = {
1298                 .id = REPLY_ADD_STA,
1299                 .len = sizeof(struct iwl_addsta_cmd),
1300                 .meta.flags = flags,
1301                 .data = sta,
1302         };
1303
1304         if (flags & CMD_ASYNC)
1305                 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1306         else
1307                 cmd.meta.flags |= CMD_WANT_SKB;
1308
1309         rc = iwl_send_cmd(priv, &cmd);
1310
1311         if (rc || (flags & CMD_ASYNC))
1312                 return rc;
1313
1314         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1315         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1316                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1317                           res->hdr.flags);
1318                 rc = -EIO;
1319         }
1320
1321         if (rc == 0) {
1322                 switch (res->u.add_sta.status) {
1323                 case ADD_STA_SUCCESS_MSK:
1324                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1325                         break;
1326                 default:
1327                         rc = -EIO;
1328                         IWL_WARNING("REPLY_ADD_STA failed\n");
1329                         break;
1330                 }
1331         }
1332
1333         priv->alloc_rxb_skb--;
1334         dev_kfree_skb_any(cmd.meta.u.skb);
1335
1336         return rc;
1337 }
1338
1339 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1340                                    struct ieee80211_key_conf *keyconf,
1341                                    u8 sta_id)
1342 {
1343         unsigned long flags;
1344         __le16 key_flags = 0;
1345
1346         switch (keyconf->alg) {
1347         case ALG_CCMP:
1348                 key_flags |= STA_KEY_FLG_CCMP;
1349                 key_flags |= cpu_to_le16(
1350                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1351                 key_flags &= ~STA_KEY_FLG_INVALID;
1352                 break;
1353         case ALG_TKIP:
1354         case ALG_WEP:
1355                 return -EINVAL;
1356         default:
1357                 return -EINVAL;
1358         }
1359         spin_lock_irqsave(&priv->sta_lock, flags);
1360         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1361         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1362         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1363                keyconf->keylen);
1364
1365         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1366                keyconf->keylen);
1367         priv->stations[sta_id].sta.key.key_flags = key_flags;
1368         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1369         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1370
1371         spin_unlock_irqrestore(&priv->sta_lock, flags);
1372
1373         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1374         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1375         return 0;
1376 }
1377
1378 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1379 {
1380         unsigned long flags;
1381
1382         spin_lock_irqsave(&priv->sta_lock, flags);
1383         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1384         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1385         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1386         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1387         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1388         spin_unlock_irqrestore(&priv->sta_lock, flags);
1389
1390         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1391         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1392         return 0;
1393 }
1394
1395 static void iwl_clear_free_frames(struct iwl_priv *priv)
1396 {
1397         struct list_head *element;
1398
1399         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1400                        priv->frames_count);
1401
1402         while (!list_empty(&priv->free_frames)) {
1403                 element = priv->free_frames.next;
1404                 list_del(element);
1405                 kfree(list_entry(element, struct iwl_frame, list));
1406                 priv->frames_count--;
1407         }
1408
1409         if (priv->frames_count) {
1410                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1411                             priv->frames_count);
1412                 priv->frames_count = 0;
1413         }
1414 }
1415
1416 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1417 {
1418         struct iwl_frame *frame;
1419         struct list_head *element;
1420         if (list_empty(&priv->free_frames)) {
1421                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1422                 if (!frame) {
1423                         IWL_ERROR("Could not allocate frame!\n");
1424                         return NULL;
1425                 }
1426
1427                 priv->frames_count++;
1428                 return frame;
1429         }
1430
1431         element = priv->free_frames.next;
1432         list_del(element);
1433         return list_entry(element, struct iwl_frame, list);
1434 }
1435
1436 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1437 {
1438         memset(frame, 0, sizeof(*frame));
1439         list_add(&frame->list, &priv->free_frames);
1440 }
1441
1442 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1443                                 struct ieee80211_hdr *hdr,
1444                                 const u8 *dest, int left)
1445 {
1446
1447         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1448             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1449              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1450                 return 0;
1451
1452         if (priv->ibss_beacon->len > left)
1453                 return 0;
1454
1455         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1456
1457         return priv->ibss_beacon->len;
1458 }
1459
1460 static int iwl_rate_index_from_plcp(int plcp)
1461 {
1462         int i = 0;
1463
1464         for (i = 0; i < IWL_RATE_COUNT; i++)
1465                 if (iwl_rates[i].plcp == plcp)
1466                         return i;
1467         return -1;
1468 }
1469
1470 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1471 {
1472         u8 i;
1473
1474         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1475              i = iwl_rates[i].next_ieee) {
1476                 if (rate_mask & (1 << i))
1477                         return iwl_rates[i].plcp;
1478         }
1479
1480         return IWL_RATE_INVALID;
1481 }
1482
1483 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1484 {
1485         struct iwl_frame *frame;
1486         unsigned int frame_size;
1487         int rc;
1488         u8 rate;
1489
1490         frame = iwl_get_free_frame(priv);
1491
1492         if (!frame) {
1493                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1494                           "command.\n");
1495                 return -ENOMEM;
1496         }
1497
1498         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1499                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1500                                                 0xFF0);
1501                 if (rate == IWL_INVALID_RATE)
1502                         rate = IWL_RATE_6M_PLCP;
1503         } else {
1504                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1505                 if (rate == IWL_INVALID_RATE)
1506                         rate = IWL_RATE_1M_PLCP;
1507         }
1508
1509         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1510
1511         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1512                               &frame->u.cmd[0]);
1513
1514         iwl_free_frame(priv, frame);
1515
1516         return rc;
1517 }
1518
1519 /******************************************************************************
1520  *
1521  * EEPROM related functions
1522  *
1523  ******************************************************************************/
1524
1525 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1526 {
1527         memcpy(mac, priv->eeprom.mac_address, 6);
1528 }
1529
1530 /**
1531  * iwl_eeprom_init - read EEPROM contents
1532  *
1533  * Load the EEPROM from adapter into priv->eeprom
1534  *
1535  * NOTE:  This routine uses the non-debug IO access functions.
1536  */
1537 int iwl_eeprom_init(struct iwl_priv *priv)
1538 {
1539         u16 *e = (u16 *)&priv->eeprom;
1540         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1541         u32 r;
1542         int sz = sizeof(priv->eeprom);
1543         int rc;
1544         int i;
1545         u16 addr;
1546
1547         /* The EEPROM structure has several padding buffers within it
1548          * and when adding new EEPROM maps is subject to programmer errors
1549          * which may be very difficult to identify without explicitly
1550          * checking the resulting size of the eeprom map. */
1551         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1552
1553         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1554                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1555                 return -ENOENT;
1556         }
1557
1558         rc = iwl_eeprom_aqcuire_semaphore(priv);
1559         if (rc < 0) {
1560                 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1561                 return -ENOENT;
1562         }
1563
1564         /* eeprom is an array of 16bit values */
1565         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1566                 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1567                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1568
1569                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1570                                         i += IWL_EEPROM_ACCESS_DELAY) {
1571                         r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1572                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1573                                 break;
1574                         udelay(IWL_EEPROM_ACCESS_DELAY);
1575                 }
1576
1577                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1578                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1579                         return -ETIMEDOUT;
1580                 }
1581                 e[addr / 2] = le16_to_cpu(r >> 16);
1582         }
1583
1584         return 0;
1585 }
1586
1587 /******************************************************************************
1588  *
1589  * Misc. internal state and helper functions
1590  *
1591  ******************************************************************************/
1592 #ifdef CONFIG_IWLWIFI_DEBUG
1593
1594 /**
1595  * iwl_report_frame - dump frame to syslog during debug sessions
1596  *
1597  * hack this function to show different aspects of received frames,
1598  * including selective frame dumps.
1599  * group100 parameter selects whether to show 1 out of 100 good frames.
1600  *
1601  * TODO:  ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1602  *        info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1603  *        is 3945-specific and gives bad output for 4965.  Need to split the
1604  *        functionality, keep common stuff here.
1605  */
1606 void iwl_report_frame(struct iwl_priv *priv,
1607                       struct iwl_rx_packet *pkt,
1608                       struct ieee80211_hdr *header, int group100)
1609 {
1610         u32 to_us;
1611         u32 print_summary = 0;
1612         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1613         u32 hundred = 0;
1614         u32 dataframe = 0;
1615         u16 fc;
1616         u16 seq_ctl;
1617         u16 channel;
1618         u16 phy_flags;
1619         int rate_sym;
1620         u16 length;
1621         u16 status;
1622         u16 bcn_tmr;
1623         u32 tsf_low;
1624         u64 tsf;
1625         u8 rssi;
1626         u8 agc;
1627         u16 sig_avg;
1628         u16 noise_diff;
1629         struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1630         struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1631         struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1632         u8 *data = IWL_RX_DATA(pkt);
1633
1634         /* MAC header */
1635         fc = le16_to_cpu(header->frame_control);
1636         seq_ctl = le16_to_cpu(header->seq_ctrl);
1637
1638         /* metadata */
1639         channel = le16_to_cpu(rx_hdr->channel);
1640         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1641         rate_sym = rx_hdr->rate;
1642         length = le16_to_cpu(rx_hdr->len);
1643
1644         /* end-of-frame status and timestamp */
1645         status = le32_to_cpu(rx_end->status);
1646         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1647         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1648         tsf = le64_to_cpu(rx_end->timestamp);
1649
1650         /* signal statistics */
1651         rssi = rx_stats->rssi;
1652         agc = rx_stats->agc;
1653         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1654         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1655
1656         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1657
1658         /* if data frame is to us and all is good,
1659          *   (optionally) print summary for only 1 out of every 100 */
1660         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1661             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1662                 dataframe = 1;
1663                 if (!group100)
1664                         print_summary = 1;      /* print each frame */
1665                 else if (priv->framecnt_to_us < 100) {
1666                         priv->framecnt_to_us++;
1667                         print_summary = 0;
1668                 } else {
1669                         priv->framecnt_to_us = 0;
1670                         print_summary = 1;
1671                         hundred = 1;
1672                 }
1673         } else {
1674                 /* print summary for all other frames */
1675                 print_summary = 1;
1676         }
1677
1678         if (print_summary) {
1679                 char *title;
1680                 u32 rate;
1681
1682                 if (hundred)
1683                         title = "100Frames";
1684                 else if (fc & IEEE80211_FCTL_RETRY)
1685                         title = "Retry";
1686                 else if (ieee80211_is_assoc_response(fc))
1687                         title = "AscRsp";
1688                 else if (ieee80211_is_reassoc_response(fc))
1689                         title = "RasRsp";
1690                 else if (ieee80211_is_probe_response(fc)) {
1691                         title = "PrbRsp";
1692                         print_dump = 1; /* dump frame contents */
1693                 } else if (ieee80211_is_beacon(fc)) {
1694                         title = "Beacon";
1695                         print_dump = 1; /* dump frame contents */
1696                 } else if (ieee80211_is_atim(fc))
1697                         title = "ATIM";
1698                 else if (ieee80211_is_auth(fc))
1699                         title = "Auth";
1700                 else if (ieee80211_is_deauth(fc))
1701                         title = "DeAuth";
1702                 else if (ieee80211_is_disassoc(fc))
1703                         title = "DisAssoc";
1704                 else
1705                         title = "Frame";
1706
1707                 rate = iwl_rate_index_from_plcp(rate_sym);
1708                 if (rate == -1)
1709                         rate = 0;
1710                 else
1711                         rate = iwl_rates[rate].ieee / 2;
1712
1713                 /* print frame summary.
1714                  * MAC addresses show just the last byte (for brevity),
1715                  *    but you can hack it to show more, if you'd like to. */
1716                 if (dataframe)
1717                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1718                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1719                                      title, fc, header->addr1[5],
1720                                      length, rssi, channel, rate);
1721                 else {
1722                         /* src/dst addresses assume managed mode */
1723                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1724                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1725                                      "phy=0x%02x, chnl=%d\n",
1726                                      title, fc, header->addr1[5],
1727                                      header->addr3[5], rssi,
1728                                      tsf_low - priv->scan_start_tsf,
1729                                      phy_flags, channel);
1730                 }
1731         }
1732         if (print_dump)
1733                 iwl_print_hex_dump(IWL_DL_RX, data, length);
1734 }
1735 #endif
1736
1737 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1738 {
1739         if (priv->hw_setting.shared_virt)
1740                 pci_free_consistent(priv->pci_dev,
1741                                     sizeof(struct iwl_shared),
1742                                     priv->hw_setting.shared_virt,
1743                                     priv->hw_setting.shared_phys);
1744 }
1745
1746 /**
1747  * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1748  *
1749  * return : set the bit for each supported rate insert in ie
1750  */
1751 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1752                                     u16 basic_rate, int max_count)
1753 {
1754         u16 ret_rates = 0, bit;
1755         int i;
1756         u8 *rates;
1757
1758         rates = &(ie[1]);
1759
1760         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1761                 if (bit & supported_rate) {
1762                         ret_rates |= bit;
1763                         rates[*ie] = iwl_rates[i].ieee |
1764                             ((bit & basic_rate) ? 0x80 : 0x00);
1765                         *ie = *ie + 1;
1766                         if (*ie >= max_count)
1767                                 break;
1768                 }
1769         }
1770
1771         return ret_rates;
1772 }
1773
1774 /**
1775  * iwl_fill_probe_req - fill in all required fields and IE for probe request
1776  */
1777 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1778                               struct ieee80211_mgmt *frame,
1779                               int left, int is_direct)
1780 {
1781         int len = 0;
1782         u8 *pos = NULL;
1783         u16 ret_rates;
1784
1785         /* Make sure there is enough space for the probe request,
1786          * two mandatory IEs and the data */
1787         left -= 24;
1788         if (left < 0)
1789                 return 0;
1790         len += 24;
1791
1792         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1793         memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1794         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1795         memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1796         frame->seq_ctrl = 0;
1797
1798         /* fill in our indirect SSID IE */
1799         /* ...next IE... */
1800
1801         left -= 2;
1802         if (left < 0)
1803                 return 0;
1804         len += 2;
1805         pos = &(frame->u.probe_req.variable[0]);
1806         *pos++ = WLAN_EID_SSID;
1807         *pos++ = 0;
1808
1809         /* fill in our direct SSID IE... */
1810         if (is_direct) {
1811                 /* ...next IE... */
1812                 left -= 2 + priv->essid_len;
1813                 if (left < 0)
1814                         return 0;
1815                 /* ... fill it in... */
1816                 *pos++ = WLAN_EID_SSID;
1817                 *pos++ = priv->essid_len;
1818                 memcpy(pos, priv->essid, priv->essid_len);
1819                 pos += priv->essid_len;
1820                 len += 2 + priv->essid_len;
1821         }
1822
1823         /* fill in supported rate */
1824         /* ...next IE... */
1825         left -= 2;
1826         if (left < 0)
1827                 return 0;
1828         /* ... fill it in... */
1829         *pos++ = WLAN_EID_SUPP_RATES;
1830         *pos = 0;
1831         ret_rates = priv->active_rate = priv->rates_mask;
1832         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1833
1834         iwl_supported_rate_to_ie(pos, priv->active_rate,
1835                                  priv->active_rate_basic, left);
1836         len += 2 + *pos;
1837         pos += (*pos) + 1;
1838         ret_rates = ~ret_rates & priv->active_rate;
1839
1840         if (ret_rates == 0)
1841                 goto fill_end;
1842
1843         /* fill in supported extended rate */
1844         /* ...next IE... */
1845         left -= 2;
1846         if (left < 0)
1847                 return 0;
1848         /* ... fill it in... */
1849         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1850         *pos = 0;
1851         iwl_supported_rate_to_ie(pos, ret_rates, priv->active_rate_basic, left);
1852         if (*pos > 0)
1853                 len += 2 + *pos;
1854
1855  fill_end:
1856         return (u16)len;
1857 }
1858
1859 /*
1860  * QoS  support
1861 */
1862 #ifdef CONFIG_IWLWIFI_QOS
1863 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1864                                        struct iwl_qosparam_cmd *qos)
1865 {
1866
1867         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1868                                 sizeof(struct iwl_qosparam_cmd), qos);
1869 }
1870
1871 static void iwl_reset_qos(struct iwl_priv *priv)
1872 {
1873         u16 cw_min = 15;
1874         u16 cw_max = 1023;
1875         u8 aifs = 2;
1876         u8 is_legacy = 0;
1877         unsigned long flags;
1878         int i;
1879
1880         spin_lock_irqsave(&priv->lock, flags);
1881         priv->qos_data.qos_active = 0;
1882
1883         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1884                 if (priv->qos_data.qos_enable)
1885                         priv->qos_data.qos_active = 1;
1886                 if (!(priv->active_rate & 0xfff0)) {
1887                         cw_min = 31;
1888                         is_legacy = 1;
1889                 }
1890         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1891                 if (priv->qos_data.qos_enable)
1892                         priv->qos_data.qos_active = 1;
1893         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1894                 cw_min = 31;
1895                 is_legacy = 1;
1896         }
1897
1898         if (priv->qos_data.qos_active)
1899                 aifs = 3;
1900
1901         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1902         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1903         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1904         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1905         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1906
1907         if (priv->qos_data.qos_active) {
1908                 i = 1;
1909                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1910                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1911                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1912                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1913                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1914
1915                 i = 2;
1916                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1917                         cpu_to_le16((cw_min + 1) / 2 - 1);
1918                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1919                         cpu_to_le16(cw_max);
1920                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1921                 if (is_legacy)
1922                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1923                                 cpu_to_le16(6016);
1924                 else
1925                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1926                                 cpu_to_le16(3008);
1927                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1928
1929                 i = 3;
1930                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1931                         cpu_to_le16((cw_min + 1) / 4 - 1);
1932                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1933                         cpu_to_le16((cw_max + 1) / 2 - 1);
1934                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1935                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1936                 if (is_legacy)
1937                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1938                                 cpu_to_le16(3264);
1939                 else
1940                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1941                                 cpu_to_le16(1504);
1942         } else {
1943                 for (i = 1; i < 4; i++) {
1944                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1945                                 cpu_to_le16(cw_min);
1946                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1947                                 cpu_to_le16(cw_max);
1948                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1949                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1950                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1951                 }
1952         }
1953         IWL_DEBUG_QOS("set QoS to default \n");
1954
1955         spin_unlock_irqrestore(&priv->lock, flags);
1956 }
1957
1958 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
1959 {
1960         unsigned long flags;
1961
1962         if (priv == NULL)
1963                 return;
1964
1965         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1966                 return;
1967
1968         if (!priv->qos_data.qos_enable)
1969                 return;
1970
1971         spin_lock_irqsave(&priv->lock, flags);
1972         priv->qos_data.def_qos_parm.qos_flags = 0;
1973
1974         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1975             !priv->qos_data.qos_cap.q_AP.txop_request)
1976                 priv->qos_data.def_qos_parm.qos_flags |=
1977                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1978
1979         if (priv->qos_data.qos_active)
1980                 priv->qos_data.def_qos_parm.qos_flags |=
1981                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1982
1983         spin_unlock_irqrestore(&priv->lock, flags);
1984
1985         if (force || iwl_is_associated(priv)) {
1986                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
1987                               priv->qos_data.qos_active);
1988
1989                 iwl_send_qos_params_command(priv,
1990                                 &(priv->qos_data.def_qos_parm));
1991         }
1992 }
1993
1994 #endif /* CONFIG_IWLWIFI_QOS */
1995 /*
1996  * Power management (not Tx power!) functions
1997  */
1998 #define MSEC_TO_USEC 1024
1999
2000 #define NOSLP __constant_cpu_to_le32(0)
2001 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
2002 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2003 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2004                                      __constant_cpu_to_le32(X1), \
2005                                      __constant_cpu_to_le32(X2), \
2006                                      __constant_cpu_to_le32(X3), \
2007                                      __constant_cpu_to_le32(X4)}
2008
2009
2010 /* default power management (not Tx power) table values */
2011 /* for tim  0-10 */
2012 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2013         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2014         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2015         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2016         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2017         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2018         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2019 };
2020
2021 /* for tim > 10 */
2022 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2023         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2024         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2025                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2026         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2027                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2028         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2029                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2030         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2031         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2032                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2033 };
2034
2035 int iwl_power_init_handle(struct iwl_priv *priv)
2036 {
2037         int rc = 0, i;
2038         struct iwl_power_mgr *pow_data;
2039         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2040         u16 pci_pm;
2041
2042         IWL_DEBUG_POWER("Initialize power \n");
2043
2044         pow_data = &(priv->power_data);
2045
2046         memset(pow_data, 0, sizeof(*pow_data));
2047
2048         pow_data->active_index = IWL_POWER_RANGE_0;
2049         pow_data->dtim_val = 0xffff;
2050
2051         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2052         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2053
2054         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2055         if (rc != 0)
2056                 return 0;
2057         else {
2058                 struct iwl_powertable_cmd *cmd;
2059
2060                 IWL_DEBUG_POWER("adjust power command flags\n");
2061
2062                 for (i = 0; i < IWL_POWER_AC; i++) {
2063                         cmd = &pow_data->pwr_range_0[i].cmd;
2064
2065                         if (pci_pm & 0x1)
2066                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2067                         else
2068                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2069                 }
2070         }
2071         return rc;
2072 }
2073
2074 static int iwl_update_power_cmd(struct iwl_priv *priv,
2075                                 struct iwl_powertable_cmd *cmd, u32 mode)
2076 {
2077         int rc = 0, i;
2078         u8 skip;
2079         u32 max_sleep = 0;
2080         struct iwl_power_vec_entry *range;
2081         u8 period = 0;
2082         struct iwl_power_mgr *pow_data;
2083
2084         if (mode > IWL_POWER_INDEX_5) {
2085                 IWL_DEBUG_POWER("Error invalid power mode \n");
2086                 return -1;
2087         }
2088         pow_data = &(priv->power_data);
2089
2090         if (pow_data->active_index == IWL_POWER_RANGE_0)
2091                 range = &pow_data->pwr_range_0[0];
2092         else
2093                 range = &pow_data->pwr_range_1[1];
2094
2095         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2096
2097 #ifdef IWL_MAC80211_DISABLE
2098         if (priv->assoc_network != NULL) {
2099                 unsigned long flags;
2100
2101                 period = priv->assoc_network->tim.tim_period;
2102         }
2103 #endif  /*IWL_MAC80211_DISABLE */
2104         skip = range[mode].no_dtim;
2105
2106         if (period == 0) {
2107                 period = 1;
2108                 skip = 0;
2109         }
2110
2111         if (skip == 0) {
2112                 max_sleep = period;
2113                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2114         } else {
2115                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2116                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2117                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2118         }
2119
2120         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2121                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2122                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2123         }
2124
2125         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2126         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2127         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2128         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2129                         le32_to_cpu(cmd->sleep_interval[0]),
2130                         le32_to_cpu(cmd->sleep_interval[1]),
2131                         le32_to_cpu(cmd->sleep_interval[2]),
2132                         le32_to_cpu(cmd->sleep_interval[3]),
2133                         le32_to_cpu(cmd->sleep_interval[4]));
2134
2135         return rc;
2136 }
2137
2138 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2139 {
2140         u32 final_mode = mode;
2141         int rc;
2142         struct iwl_powertable_cmd cmd;
2143
2144         /* If on battery, set to 3,
2145          * if plugged into AC power, set to CAM ("continuosly aware mode"),
2146          * else user level */
2147         switch (mode) {
2148         case IWL_POWER_BATTERY:
2149                 final_mode = IWL_POWER_INDEX_3;
2150                 break;
2151         case IWL_POWER_AC:
2152                 final_mode = IWL_POWER_MODE_CAM;
2153                 break;
2154         default:
2155                 final_mode = mode;
2156                 break;
2157         }
2158
2159         iwl_update_power_cmd(priv, &cmd, final_mode);
2160
2161         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2162
2163         if (final_mode == IWL_POWER_MODE_CAM)
2164                 clear_bit(STATUS_POWER_PMI, &priv->status);
2165         else
2166                 set_bit(STATUS_POWER_PMI, &priv->status);
2167
2168         return rc;
2169 }
2170
2171 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2172 {
2173         /* Filter incoming packets to determine if they are targeted toward
2174          * this network, discarding packets coming from ourselves */
2175         switch (priv->iw_mode) {
2176         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2177                 /* packets from our adapter are dropped (echo) */
2178                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2179                         return 0;
2180                 /* {broad,multi}cast packets to our IBSS go through */
2181                 if (is_multicast_ether_addr(header->addr1))
2182                         return !compare_ether_addr(header->addr3, priv->bssid);
2183                 /* packets to our adapter go through */
2184                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2185         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2186                 /* packets from our adapter are dropped (echo) */
2187                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2188                         return 0;
2189                 /* {broad,multi}cast packets to our BSS go through */
2190                 if (is_multicast_ether_addr(header->addr1))
2191                         return !compare_ether_addr(header->addr2, priv->bssid);
2192                 /* packets to our adapter go through */
2193                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2194         }
2195
2196         return 1;
2197 }
2198
2199 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2200
2201 const char *iwl_get_tx_fail_reason(u32 status)
2202 {
2203         switch (status & TX_STATUS_MSK) {
2204         case TX_STATUS_SUCCESS:
2205                 return "SUCCESS";
2206                 TX_STATUS_ENTRY(SHORT_LIMIT);
2207                 TX_STATUS_ENTRY(LONG_LIMIT);
2208                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2209                 TX_STATUS_ENTRY(MGMNT_ABORT);
2210                 TX_STATUS_ENTRY(NEXT_FRAG);
2211                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2212                 TX_STATUS_ENTRY(DEST_PS);
2213                 TX_STATUS_ENTRY(ABORTED);
2214                 TX_STATUS_ENTRY(BT_RETRY);
2215                 TX_STATUS_ENTRY(STA_INVALID);
2216                 TX_STATUS_ENTRY(FRAG_DROPPED);
2217                 TX_STATUS_ENTRY(TID_DISABLE);
2218                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2219                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2220                 TX_STATUS_ENTRY(TX_LOCKED);
2221                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2222         }
2223
2224         return "UNKNOWN";
2225 }
2226
2227 /**
2228  * iwl_scan_cancel - Cancel any currently executing HW scan
2229  *
2230  * NOTE: priv->mutex is not required before calling this function
2231  */
2232 static int iwl_scan_cancel(struct iwl_priv *priv)
2233 {
2234         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2235                 clear_bit(STATUS_SCANNING, &priv->status);
2236                 return 0;
2237         }
2238
2239         if (test_bit(STATUS_SCANNING, &priv->status)) {
2240                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2241                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2242                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2243                         queue_work(priv->workqueue, &priv->abort_scan);
2244
2245                 } else
2246                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2247
2248                 return test_bit(STATUS_SCANNING, &priv->status);
2249         }
2250
2251         return 0;
2252 }
2253
2254 /**
2255  * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2256  * @ms: amount of time to wait (in milliseconds) for scan to abort
2257  *
2258  * NOTE: priv->mutex must be held before calling this function
2259  */
2260 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2261 {
2262         unsigned long now = jiffies;
2263         int ret;
2264
2265         ret = iwl_scan_cancel(priv);
2266         if (ret && ms) {
2267                 mutex_unlock(&priv->mutex);
2268                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2269                                 test_bit(STATUS_SCANNING, &priv->status))
2270                         msleep(1);
2271                 mutex_lock(&priv->mutex);
2272
2273                 return test_bit(STATUS_SCANNING, &priv->status);
2274         }
2275
2276         return ret;
2277 }
2278
2279 static void iwl_sequence_reset(struct iwl_priv *priv)
2280 {
2281         /* Reset ieee stats */
2282
2283         /* We don't reset the net_device_stats (ieee->stats) on
2284          * re-association */
2285
2286         priv->last_seq_num = -1;
2287         priv->last_frag_num = -1;
2288         priv->last_packet_time = 0;
2289
2290         iwl_scan_cancel(priv);
2291 }
2292
2293 #define MAX_UCODE_BEACON_INTERVAL       1024
2294 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2295
2296 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2297 {
2298         u16 new_val = 0;
2299         u16 beacon_factor = 0;
2300
2301         beacon_factor =
2302             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2303                 / MAX_UCODE_BEACON_INTERVAL;
2304         new_val = beacon_val / beacon_factor;
2305
2306         return cpu_to_le16(new_val);
2307 }
2308
2309 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2310 {
2311         u64 interval_tm_unit;
2312         u64 tsf, result;
2313         unsigned long flags;
2314         struct ieee80211_conf *conf = NULL;
2315         u16 beacon_int = 0;
2316
2317         conf = ieee80211_get_hw_conf(priv->hw);
2318
2319         spin_lock_irqsave(&priv->lock, flags);
2320         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2321         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2322
2323         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2324
2325         tsf = priv->timestamp1;
2326         tsf = ((tsf << 32) | priv->timestamp0);
2327
2328         beacon_int = priv->beacon_int;
2329         spin_unlock_irqrestore(&priv->lock, flags);
2330
2331         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2332                 if (beacon_int == 0) {
2333                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2334                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2335                 } else {
2336                         priv->rxon_timing.beacon_interval =
2337                                 cpu_to_le16(beacon_int);
2338                         priv->rxon_timing.beacon_interval =
2339                             iwl_adjust_beacon_interval(
2340                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2341                 }
2342
2343                 priv->rxon_timing.atim_window = 0;
2344         } else {
2345                 priv->rxon_timing.beacon_interval =
2346                         iwl_adjust_beacon_interval(conf->beacon_int);
2347                 /* TODO: we need to get atim_window from upper stack
2348                  * for now we set to 0 */
2349                 priv->rxon_timing.atim_window = 0;
2350         }
2351
2352         interval_tm_unit =
2353                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2354         result = do_div(tsf, interval_tm_unit);
2355         priv->rxon_timing.beacon_init_val =
2356             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2357
2358         IWL_DEBUG_ASSOC
2359             ("beacon interval %d beacon timer %d beacon tim %d\n",
2360                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2361                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2362                 le16_to_cpu(priv->rxon_timing.atim_window));
2363 }
2364
2365 static int iwl_scan_initiate(struct iwl_priv *priv)
2366 {
2367         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2368                 IWL_ERROR("APs don't scan.\n");
2369                 return 0;
2370         }
2371
2372         if (!iwl_is_ready_rf(priv)) {
2373                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2374                 return -EIO;
2375         }
2376
2377         if (test_bit(STATUS_SCANNING, &priv->status)) {
2378                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2379                 return -EAGAIN;
2380         }
2381
2382         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2383                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2384                                "Queuing.\n");
2385                 return -EAGAIN;
2386         }
2387
2388         IWL_DEBUG_INFO("Starting scan...\n");
2389         priv->scan_bands = 2;
2390         set_bit(STATUS_SCANNING, &priv->status);
2391         priv->scan_start = jiffies;
2392         priv->scan_pass_start = priv->scan_start;
2393
2394         queue_work(priv->workqueue, &priv->request_scan);
2395
2396         return 0;
2397 }
2398
2399 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2400 {
2401         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2402
2403         if (hw_decrypt)
2404                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2405         else
2406                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2407
2408         return 0;
2409 }
2410
2411 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2412 {
2413         if (phymode == MODE_IEEE80211A) {
2414                 priv->staging_rxon.flags &=
2415                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2416                       | RXON_FLG_CCK_MSK);
2417                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2418         } else {
2419                 /* Copied from iwl_bg_post_associate() */
2420                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2421                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2422                 else
2423                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2424
2425                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2426                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2427
2428                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2429                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2430                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2431         }
2432 }
2433
2434 /*
2435  * initilize rxon structure with default values fromm eeprom
2436  */
2437 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2438 {
2439         const struct iwl_channel_info *ch_info;
2440
2441         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2442
2443         switch (priv->iw_mode) {
2444         case IEEE80211_IF_TYPE_AP:
2445                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2446                 break;
2447
2448         case IEEE80211_IF_TYPE_STA:
2449                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2450                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2451                 break;
2452
2453         case IEEE80211_IF_TYPE_IBSS:
2454                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2455                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2456                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2457                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2458                 break;
2459
2460         case IEEE80211_IF_TYPE_MNTR:
2461                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2462                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2463                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2464                 break;
2465         }
2466
2467 #if 0
2468         /* TODO:  Figure out when short_preamble would be set and cache from
2469          * that */
2470         if (!hw_to_local(priv->hw)->short_preamble)
2471                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2472         else
2473                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2474 #endif
2475
2476         ch_info = iwl_get_channel_info(priv, priv->phymode,
2477                                        le16_to_cpu(priv->staging_rxon.channel));
2478
2479         if (!ch_info)
2480                 ch_info = &priv->channel_info[0];
2481
2482         /*
2483          * in some case A channels are all non IBSS
2484          * in this case force B/G channel
2485          */
2486         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2487             !(is_channel_ibss(ch_info)))
2488                 ch_info = &priv->channel_info[0];
2489
2490         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2491         if (is_channel_a_band(ch_info))
2492                 priv->phymode = MODE_IEEE80211A;
2493         else
2494                 priv->phymode = MODE_IEEE80211G;
2495
2496         iwl_set_flags_for_phymode(priv, priv->phymode);
2497
2498         priv->staging_rxon.ofdm_basic_rates =
2499             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2500         priv->staging_rxon.cck_basic_rates =
2501             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2502 }
2503
2504 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2505 {
2506         if (!iwl_is_ready_rf(priv))
2507                 return -EAGAIN;
2508
2509         if (mode == IEEE80211_IF_TYPE_IBSS) {
2510                 const struct iwl_channel_info *ch_info;
2511
2512                 ch_info = iwl_get_channel_info(priv,
2513                         priv->phymode,
2514                         le16_to_cpu(priv->staging_rxon.channel));
2515
2516                 if (!ch_info || !is_channel_ibss(ch_info)) {
2517                         IWL_ERROR("channel %d not IBSS channel\n",
2518                                   le16_to_cpu(priv->staging_rxon.channel));
2519                         return -EINVAL;
2520                 }
2521         }
2522
2523         cancel_delayed_work(&priv->scan_check);
2524         if (iwl_scan_cancel_timeout(priv, 100)) {
2525                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2526                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2527                 return -EAGAIN;
2528         }
2529
2530         priv->iw_mode = mode;
2531
2532         iwl_connection_init_rx_config(priv);
2533         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2534
2535         iwl_clear_stations_table(priv);
2536
2537         iwl_commit_rxon(priv);
2538
2539         return 0;
2540 }
2541
2542 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2543                                       struct ieee80211_tx_control *ctl,
2544                                       struct iwl_cmd *cmd,
2545                                       struct sk_buff *skb_frag,
2546                                       int last_frag)
2547 {
2548         struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2549
2550         switch (keyinfo->alg) {
2551         case ALG_CCMP:
2552                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2553                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2554                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2555                 break;
2556
2557         case ALG_TKIP:
2558 #if 0
2559                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2560
2561                 if (last_frag)
2562                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2563                                8);
2564                 else
2565                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2566 #endif
2567                 break;
2568
2569         case ALG_WEP:
2570                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2571                     (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2572
2573                 if (keyinfo->keylen == 13)
2574                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2575
2576                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2577
2578                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2579                              "with key %d\n", ctl->key_idx);
2580                 break;
2581
2582         case ALG_NONE:
2583                 IWL_DEBUG_TX("Tx packet in the clear (encrypt requested).\n");
2584                 break;
2585
2586         default:
2587                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2588                 break;
2589         }
2590 }
2591
2592 /*
2593  * handle build REPLY_TX command notification.
2594  */
2595 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2596                                   struct iwl_cmd *cmd,
2597                                   struct ieee80211_tx_control *ctrl,
2598                                   struct ieee80211_hdr *hdr,
2599                                   int is_unicast, u8 std_id)
2600 {
2601         __le16 *qc;
2602         u16 fc = le16_to_cpu(hdr->frame_control);
2603         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2604
2605         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2606         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2607                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2608                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2609                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2610                 if (ieee80211_is_probe_response(fc) &&
2611                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2612                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2613         } else {
2614                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2615                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2616         }
2617
2618         cmd->cmd.tx.sta_id = std_id;
2619         if (ieee80211_get_morefrag(hdr))
2620                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2621
2622         qc = ieee80211_get_qos_ctrl(hdr);
2623         if (qc) {
2624                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2625                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2626         } else
2627                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2628
2629         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2630                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2631                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2632         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2633                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2634                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2635         }
2636
2637         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2638                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2639
2640         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2641         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2642                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2643                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2644                         cmd->cmd.tx.timeout.pm_frame_timeout =
2645                                 cpu_to_le16(3);
2646                 else
2647                         cmd->cmd.tx.timeout.pm_frame_timeout =
2648                                 cpu_to_le16(2);
2649         } else
2650                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2651
2652         cmd->cmd.tx.driver_txop = 0;
2653         cmd->cmd.tx.tx_flags = tx_flags;
2654         cmd->cmd.tx.next_frame_len = 0;
2655 }
2656
2657 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2658 {
2659         int sta_id;
2660         u16 fc = le16_to_cpu(hdr->frame_control);
2661
2662         /* If this frame is broadcast or not data then use the broadcast
2663          * station id */
2664         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2665             is_multicast_ether_addr(hdr->addr1))
2666                 return priv->hw_setting.bcast_sta_id;
2667
2668         switch (priv->iw_mode) {
2669
2670         /* If this frame is part of a BSS network (we're a station), then
2671          * we use the AP's station id */
2672         case IEEE80211_IF_TYPE_STA:
2673                 return IWL_AP_ID;
2674
2675         /* If we are an AP, then find the station, or use BCAST */
2676         case IEEE80211_IF_TYPE_AP:
2677                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2678                 if (sta_id != IWL_INVALID_STATION)
2679                         return sta_id;
2680                 return priv->hw_setting.bcast_sta_id;
2681
2682         /* If this frame is part of a IBSS network, then we use the
2683          * target specific station id */
2684         case IEEE80211_IF_TYPE_IBSS: {
2685                 DECLARE_MAC_BUF(mac);
2686
2687                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2688                 if (sta_id != IWL_INVALID_STATION)
2689                         return sta_id;
2690
2691                 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2692
2693                 if (sta_id != IWL_INVALID_STATION)
2694                         return sta_id;
2695
2696                 IWL_DEBUG_DROP("Station %s not in station map. "
2697                                "Defaulting to broadcast...\n",
2698                                print_mac(mac, hdr->addr1));
2699                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2700                 return priv->hw_setting.bcast_sta_id;
2701         }
2702         default:
2703                 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2704                 return priv->hw_setting.bcast_sta_id;
2705         }
2706 }
2707
2708 /*
2709  * start REPLY_TX command process
2710  */
2711 static int iwl_tx_skb(struct iwl_priv *priv,
2712                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2713 {
2714         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2715         struct iwl_tfd_frame *tfd;
2716         u32 *control_flags;
2717         int txq_id = ctl->queue;
2718         struct iwl_tx_queue *txq = NULL;
2719         struct iwl_queue *q = NULL;
2720         dma_addr_t phys_addr;
2721         dma_addr_t txcmd_phys;
2722         struct iwl_cmd *out_cmd = NULL;
2723         u16 len, idx, len_org;
2724         u8 id, hdr_len, unicast;
2725         u8 sta_id;
2726         u16 seq_number = 0;
2727         u16 fc;
2728         __le16 *qc;
2729         u8 wait_write_ptr = 0;
2730         unsigned long flags;
2731         int rc;
2732
2733         spin_lock_irqsave(&priv->lock, flags);
2734         if (iwl_is_rfkill(priv)) {
2735                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2736                 goto drop_unlock;
2737         }
2738
2739         if (!priv->interface_id) {
2740                 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2741                 goto drop_unlock;
2742         }
2743
2744         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2745                 IWL_ERROR("ERROR: No TX rate available.\n");
2746                 goto drop_unlock;
2747         }
2748
2749         unicast = !is_multicast_ether_addr(hdr->addr1);
2750         id = 0;
2751
2752         fc = le16_to_cpu(hdr->frame_control);
2753
2754 #ifdef CONFIG_IWLWIFI_DEBUG
2755         if (ieee80211_is_auth(fc))
2756                 IWL_DEBUG_TX("Sending AUTH frame\n");
2757         else if (ieee80211_is_assoc_request(fc))
2758                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2759         else if (ieee80211_is_reassoc_request(fc))
2760                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2761 #endif
2762
2763         if (!iwl_is_associated(priv) &&
2764             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2765                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2766                 goto drop_unlock;
2767         }
2768
2769         spin_unlock_irqrestore(&priv->lock, flags);
2770
2771         hdr_len = ieee80211_get_hdrlen(fc);
2772         sta_id = iwl_get_sta_id(priv, hdr);
2773         if (sta_id == IWL_INVALID_STATION) {
2774                 DECLARE_MAC_BUF(mac);
2775
2776                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2777                                print_mac(mac, hdr->addr1));
2778                 goto drop;
2779         }
2780
2781         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2782
2783         qc = ieee80211_get_qos_ctrl(hdr);
2784         if (qc) {
2785                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2786                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2787                                 IEEE80211_SCTL_SEQ;
2788                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2789                         (hdr->seq_ctrl &
2790                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2791                 seq_number += 0x10;
2792         }
2793         txq = &priv->txq[txq_id];
2794         q = &txq->q;
2795
2796         spin_lock_irqsave(&priv->lock, flags);
2797
2798         tfd = &txq->bd[q->first_empty];
2799         memset(tfd, 0, sizeof(*tfd));
2800         control_flags = (u32 *) tfd;
2801         idx = get_cmd_index(q, q->first_empty, 0);
2802
2803         memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2804         txq->txb[q->first_empty].skb[0] = skb;
2805         memcpy(&(txq->txb[q->first_empty].status.control),
2806                ctl, sizeof(struct ieee80211_tx_control));
2807         out_cmd = &txq->cmd[idx];
2808         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2809         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2810         out_cmd->hdr.cmd = REPLY_TX;
2811         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2812                                 INDEX_TO_SEQ(q->first_empty)));
2813         /* copy frags header */
2814         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2815
2816         /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2817         len = priv->hw_setting.tx_cmd_len +
2818                 sizeof(struct iwl_cmd_header) + hdr_len;
2819
2820         len_org = len;
2821         len = (len + 3) & ~3;
2822
2823         if (len_org != len)
2824                 len_org = 1;
2825         else
2826                 len_org = 0;
2827
2828         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2829                      offsetof(struct iwl_cmd, hdr);
2830
2831         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2832
2833         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2834                 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2835
2836         /* 802.11 null functions have no payload... */
2837         len = skb->len - hdr_len;
2838         if (len) {
2839                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2840                                            len, PCI_DMA_TODEVICE);
2841                 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2842         }
2843
2844         /* If there is no payload, then only one TFD is used */
2845         if (!len)
2846                 *control_flags = TFD_CTL_COUNT_SET(1);
2847         else
2848                 *control_flags = TFD_CTL_COUNT_SET(2) |
2849                         TFD_CTL_PAD_SET(U32_PAD(len));
2850
2851         len = (u16)skb->len;
2852         out_cmd->cmd.tx.len = cpu_to_le16(len);
2853
2854         /* TODO need this for burst mode later on */
2855         iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2856
2857         /* set is_hcca to 0; it probably will never be implemented */
2858         iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2859
2860         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2861         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2862
2863         if (!ieee80211_get_morefrag(hdr)) {
2864                 txq->need_update = 1;
2865                 if (qc) {
2866                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2867                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2868                 }
2869         } else {
2870                 wait_write_ptr = 1;
2871                 txq->need_update = 0;
2872         }
2873
2874         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2875                            sizeof(out_cmd->cmd.tx));
2876
2877         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2878                            ieee80211_get_hdrlen(fc));
2879
2880         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2881         rc = iwl_tx_queue_update_write_ptr(priv, txq);
2882         spin_unlock_irqrestore(&priv->lock, flags);
2883
2884         if (rc)
2885                 return rc;
2886
2887         if ((iwl_queue_space(q) < q->high_mark)
2888             && priv->mac80211_registered) {
2889                 if (wait_write_ptr) {
2890                         spin_lock_irqsave(&priv->lock, flags);
2891                         txq->need_update = 1;
2892                         iwl_tx_queue_update_write_ptr(priv, txq);
2893                         spin_unlock_irqrestore(&priv->lock, flags);
2894                 }
2895
2896                 ieee80211_stop_queue(priv->hw, ctl->queue);
2897         }
2898
2899         return 0;
2900
2901 drop_unlock:
2902         spin_unlock_irqrestore(&priv->lock, flags);
2903 drop:
2904         return -1;
2905 }
2906
2907 static void iwl_set_rate(struct iwl_priv *priv)
2908 {
2909         const struct ieee80211_hw_mode *hw = NULL;
2910         struct ieee80211_rate *rate;
2911         int i;
2912
2913         hw = iwl_get_hw_mode(priv, priv->phymode);
2914
2915         priv->active_rate = 0;
2916         priv->active_rate_basic = 0;
2917
2918         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
2919                        hw->mode == MODE_IEEE80211A ?
2920                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
2921
2922         for (i = 0; i < hw->num_rates; i++) {
2923                 rate = &(hw->rates[i]);
2924                 if ((rate->val < IWL_RATE_COUNT) &&
2925                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
2926                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
2927                                        rate->val, iwl_rates[rate->val].plcp,
2928                                        (rate->flags & IEEE80211_RATE_BASIC) ?
2929                                        "*" : "");
2930                         priv->active_rate |= (1 << rate->val);
2931                         if (rate->flags & IEEE80211_RATE_BASIC)
2932                                 priv->active_rate_basic |= (1 << rate->val);
2933                 } else
2934                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
2935                                        rate->val, iwl_rates[rate->val].plcp);
2936         }
2937
2938         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2939                        priv->active_rate, priv->active_rate_basic);
2940
2941         /*
2942          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2943          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2944          * OFDM
2945          */
2946         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2947                 priv->staging_rxon.cck_basic_rates =
2948                     ((priv->active_rate_basic &
2949                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2950         else
2951                 priv->staging_rxon.cck_basic_rates =
2952                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2953
2954         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2955                 priv->staging_rxon.ofdm_basic_rates =
2956                     ((priv->active_rate_basic &
2957                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2958                       IWL_FIRST_OFDM_RATE) & 0xFF;
2959         else
2960                 priv->staging_rxon.ofdm_basic_rates =
2961                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2962 }
2963
2964 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2965 {
2966         unsigned long flags;
2967
2968         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2969                 return;
2970
2971         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2972                           disable_radio ? "OFF" : "ON");
2973
2974         if (disable_radio) {
2975                 iwl_scan_cancel(priv);
2976                 /* FIXME: This is a workaround for AP */
2977                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2978                         spin_lock_irqsave(&priv->lock, flags);
2979                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2980                                     CSR_UCODE_SW_BIT_RFKILL);
2981                         spin_unlock_irqrestore(&priv->lock, flags);
2982                         iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2983                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2984                 }
2985                 return;
2986         }
2987
2988         spin_lock_irqsave(&priv->lock, flags);
2989         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2990
2991         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2992         spin_unlock_irqrestore(&priv->lock, flags);
2993
2994         /* wake up ucode */
2995         msleep(10);
2996
2997         spin_lock_irqsave(&priv->lock, flags);
2998         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2999         if (!iwl_grab_restricted_access(priv))
3000                 iwl_release_restricted_access(priv);
3001         spin_unlock_irqrestore(&priv->lock, flags);
3002
3003         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3004                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3005                                   "disabled by HW switch\n");
3006                 return;
3007         }
3008
3009         queue_work(priv->workqueue, &priv->restart);
3010         return;
3011 }
3012
3013 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3014                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3015 {
3016         u16 fc =
3017             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3018
3019         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3020                 return;
3021
3022         if (!(fc & IEEE80211_FCTL_PROTECTED))
3023                 return;
3024
3025         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3026         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3027         case RX_RES_STATUS_SEC_TYPE_TKIP:
3028                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3029                     RX_RES_STATUS_BAD_ICV_MIC)
3030                         stats->flag |= RX_FLAG_MMIC_ERROR;
3031         case RX_RES_STATUS_SEC_TYPE_WEP:
3032         case RX_RES_STATUS_SEC_TYPE_CCMP:
3033                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3034                     RX_RES_STATUS_DECRYPT_OK) {
3035                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3036                         stats->flag |= RX_FLAG_DECRYPTED;
3037                 }
3038                 break;
3039
3040         default:
3041                 break;
3042         }
3043 }
3044
3045 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3046                                     struct iwl_rx_mem_buffer *rxb,
3047                                     void *data, short len,
3048                                     struct ieee80211_rx_status *stats,
3049                                     u16 phy_flags)
3050 {
3051         struct iwl_rt_rx_hdr *iwl_rt;
3052
3053         /* First cache any information we need before we overwrite
3054          * the information provided in the skb from the hardware */
3055         s8 signal = stats->ssi;
3056         s8 noise = 0;
3057         int rate = stats->rate;
3058         u64 tsf = stats->mactime;
3059         __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3060
3061         /* We received data from the HW, so stop the watchdog */
3062         if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3063                 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3064                 return;
3065         }
3066
3067         /* copy the frame data to write after where the radiotap header goes */
3068         iwl_rt = (void *)rxb->skb->data;
3069         memmove(iwl_rt->payload, data, len);
3070
3071         iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3072         iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3073
3074         /* total header + data */
3075         iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3076
3077         /* Set the size of the skb to the size of the frame */
3078         skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3079
3080         /* Big bitfield of all the fields we provide in radiotap */
3081         iwl_rt->rt_hdr.it_present =
3082             cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3083                         (1 << IEEE80211_RADIOTAP_FLAGS) |
3084                         (1 << IEEE80211_RADIOTAP_RATE) |
3085                         (1 << IEEE80211_RADIOTAP_CHANNEL) |
3086                         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3087                         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3088                         (1 << IEEE80211_RADIOTAP_ANTENNA));
3089
3090         /* Zero the flags, we'll add to them as we go */
3091         iwl_rt->rt_flags = 0;
3092
3093         iwl_rt->rt_tsf = cpu_to_le64(tsf);
3094
3095         /* Convert to dBm */
3096         iwl_rt->rt_dbmsignal = signal;
3097         iwl_rt->rt_dbmnoise = noise;
3098
3099         /* Convert the channel frequency and set the flags */
3100         iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3101         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3102                 iwl_rt->rt_chbitmask =
3103                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3104         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3105                 iwl_rt->rt_chbitmask =
3106                     cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3107         else    /* 802.11g */
3108                 iwl_rt->rt_chbitmask =
3109                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3110
3111         rate = iwl_rate_index_from_plcp(rate);
3112         if (rate == -1)
3113                 iwl_rt->rt_rate = 0;
3114         else
3115                 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3116
3117         /* antenna number */
3118         iwl_rt->rt_antenna =
3119                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3120
3121         /* set the preamble flag if we have it */
3122         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3123                 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3124
3125         IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3126
3127         stats->flag |= RX_FLAG_RADIOTAP;
3128         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3129         rxb->skb = NULL;
3130 }
3131
3132
3133 #define IWL_PACKET_RETRY_TIME HZ
3134
3135 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3136 {
3137         u16 sc = le16_to_cpu(header->seq_ctrl);
3138         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3139         u16 frag = sc & IEEE80211_SCTL_FRAG;
3140         u16 *last_seq, *last_frag;
3141         unsigned long *last_time;
3142
3143         switch (priv->iw_mode) {
3144         case IEEE80211_IF_TYPE_IBSS:{
3145                 struct list_head *p;
3146                 struct iwl_ibss_seq *entry = NULL;
3147                 u8 *mac = header->addr2;
3148                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3149
3150                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3151                         entry =
3152                                 list_entry(p, struct iwl_ibss_seq, list);
3153                         if (!compare_ether_addr(entry->mac, mac))
3154                                 break;
3155                 }
3156                 if (p == &priv->ibss_mac_hash[index]) {
3157                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3158                         if (!entry) {
3159                                 IWL_ERROR
3160                                         ("Cannot malloc new mac entry\n");
3161                                 return 0;
3162                         }
3163                         memcpy(entry->mac, mac, ETH_ALEN);
3164                         entry->seq_num = seq;
3165                         entry->frag_num = frag;
3166                         entry->packet_time = jiffies;
3167                         list_add(&entry->list,
3168                                  &priv->ibss_mac_hash[index]);
3169                         return 0;
3170                 }
3171                 last_seq = &entry->seq_num;
3172                 last_frag = &entry->frag_num;
3173                 last_time = &entry->packet_time;
3174                 break;
3175         }
3176         case IEEE80211_IF_TYPE_STA:
3177                 last_seq = &priv->last_seq_num;
3178                 last_frag = &priv->last_frag_num;
3179                 last_time = &priv->last_packet_time;
3180                 break;
3181         default:
3182                 return 0;
3183         }
3184         if ((*last_seq == seq) &&
3185             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3186                 if (*last_frag == frag)
3187                         goto drop;
3188                 if (*last_frag + 1 != frag)
3189                         /* out-of-order fragment */
3190                         goto drop;
3191         } else
3192                 *last_seq = seq;
3193
3194         *last_frag = frag;
3195         *last_time = jiffies;
3196         return 0;
3197
3198  drop:
3199         return 1;
3200 }
3201
3202 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3203
3204 #include "iwl-spectrum.h"
3205
3206 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3207 #define BEACON_TIME_MASK_HIGH   0xFF000000
3208 #define TIME_UNIT               1024
3209
3210 /*
3211  * extended beacon time format
3212  * time in usec will be changed into a 32-bit value in 8:24 format
3213  * the high 1 byte is the beacon counts
3214  * the lower 3 bytes is the time in usec within one beacon interval
3215  */
3216
3217 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3218 {
3219         u32 quot;
3220         u32 rem;
3221         u32 interval = beacon_interval * 1024;
3222
3223         if (!interval || !usec)
3224                 return 0;
3225
3226         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3227         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3228
3229         return (quot << 24) + rem;
3230 }
3231
3232 /* base is usually what we get from ucode with each received frame,
3233  * the same as HW timer counter counting down
3234  */
3235
3236 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3237 {
3238         u32 base_low = base & BEACON_TIME_MASK_LOW;
3239         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3240         u32 interval = beacon_interval * TIME_UNIT;
3241         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3242             (addon & BEACON_TIME_MASK_HIGH);
3243
3244         if (base_low > addon_low)
3245                 res += base_low - addon_low;
3246         else if (base_low < addon_low) {
3247                 res += interval + base_low - addon_low;
3248                 res += (1 << 24);
3249         } else
3250                 res += (1 << 24);
3251
3252         return cpu_to_le32(res);
3253 }
3254
3255 static int iwl_get_measurement(struct iwl_priv *priv,
3256                                struct ieee80211_measurement_params *params,
3257                                u8 type)
3258 {
3259         struct iwl_spectrum_cmd spectrum;
3260         struct iwl_rx_packet *res;
3261         struct iwl_host_cmd cmd = {
3262                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3263                 .data = (void *)&spectrum,
3264                 .meta.flags = CMD_WANT_SKB,
3265         };
3266         u32 add_time = le64_to_cpu(params->start_time);
3267         int rc;
3268         int spectrum_resp_status;
3269         int duration = le16_to_cpu(params->duration);
3270
3271         if (iwl_is_associated(priv))
3272                 add_time =
3273                     iwl_usecs_to_beacons(
3274                         le64_to_cpu(params->start_time) - priv->last_tsf,
3275                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3276
3277         memset(&spectrum, 0, sizeof(spectrum));
3278
3279         spectrum.channel_count = cpu_to_le16(1);
3280         spectrum.flags =
3281             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3282         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3283         cmd.len = sizeof(spectrum);
3284         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3285
3286         if (iwl_is_associated(priv))
3287                 spectrum.start_time =
3288                     iwl_add_beacon_time(priv->last_beacon_time,
3289                                 add_time,
3290                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3291         else
3292                 spectrum.start_time = 0;
3293
3294         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3295         spectrum.channels[0].channel = params->channel;
3296         spectrum.channels[0].type = type;
3297         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3298                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3299                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3300
3301         rc = iwl_send_cmd_sync(priv, &cmd);
3302         if (rc)
3303                 return rc;
3304
3305         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3306         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3307                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3308                 rc = -EIO;
3309         }
3310
3311         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3312         switch (spectrum_resp_status) {
3313         case 0:         /* Command will be handled */
3314                 if (res->u.spectrum.id != 0xff) {
3315                         IWL_DEBUG_INFO
3316                             ("Replaced existing measurement: %d\n",
3317                              res->u.spectrum.id);
3318                         priv->measurement_status &= ~MEASUREMENT_READY;
3319                 }
3320                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3321                 rc = 0;
3322                 break;
3323
3324         case 1:         /* Command will not be handled */
3325                 rc = -EAGAIN;
3326                 break;
3327         }
3328
3329         dev_kfree_skb_any(cmd.meta.u.skb);
3330
3331         return rc;
3332 }
3333 #endif
3334
3335 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3336                                  struct iwl_tx_info *tx_sta)
3337 {
3338
3339         tx_sta->status.ack_signal = 0;
3340         tx_sta->status.excessive_retries = 0;
3341         tx_sta->status.queue_length = 0;
3342         tx_sta->status.queue_number = 0;
3343
3344         if (in_interrupt())
3345                 ieee80211_tx_status_irqsafe(priv->hw,
3346                                             tx_sta->skb[0], &(tx_sta->status));
3347         else
3348                 ieee80211_tx_status(priv->hw,
3349                                     tx_sta->skb[0], &(tx_sta->status));
3350
3351         tx_sta->skb[0] = NULL;
3352 }
3353
3354 /**
3355  * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3356  *
3357  * When FW advances 'R' index, all entries between old and
3358  * new 'R' index need to be reclaimed. As result, some free space
3359  * forms. If there is enough free space (> low mark), wake Tx queue.
3360  */
3361 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3362 {
3363         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3364         struct iwl_queue *q = &txq->q;
3365         int nfreed = 0;
3366
3367         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3368                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3369                           "is out of range [0-%d] %d %d.\n", txq_id,
3370                           index, q->n_bd, q->first_empty, q->last_used);
3371                 return 0;
3372         }
3373
3374         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3375                 q->last_used != index;
3376                 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3377                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3378                         iwl_txstatus_to_ieee(priv,
3379                                         &(txq->txb[txq->q.last_used]));
3380                         iwl_hw_txq_free_tfd(priv, txq);
3381                 } else if (nfreed > 1) {
3382                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3383                                         q->first_empty, q->last_used);
3384                         queue_work(priv->workqueue, &priv->restart);
3385                 }
3386                 nfreed++;
3387         }
3388
3389         if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3390                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3391                         priv->mac80211_registered)
3392                 ieee80211_wake_queue(priv->hw, txq_id);
3393
3394
3395         return nfreed;
3396 }
3397
3398 static int iwl_is_tx_success(u32 status)
3399 {
3400         return (status & 0xFF) == 0x1;
3401 }
3402
3403 /******************************************************************************
3404  *
3405  * Generic RX handler implementations
3406  *
3407  ******************************************************************************/
3408 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3409                             struct iwl_rx_mem_buffer *rxb)
3410 {
3411         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3412         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3413         int txq_id = SEQ_TO_QUEUE(sequence);
3414         int index = SEQ_TO_INDEX(sequence);
3415         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3416         struct ieee80211_tx_status *tx_status;
3417         struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3418         u32  status = le32_to_cpu(tx_resp->status);
3419
3420         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3421                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3422                           "is out of range [0-%d] %d %d\n", txq_id,
3423                           index, txq->q.n_bd, txq->q.first_empty,
3424                           txq->q.last_used);
3425                 return;
3426         }
3427
3428         tx_status = &(txq->txb[txq->q.last_used].status);
3429
3430         tx_status->retry_count = tx_resp->failure_frame;
3431         tx_status->queue_number = status;
3432         tx_status->queue_length = tx_resp->bt_kill_count;
3433         tx_status->queue_length |= tx_resp->failure_rts;
3434
3435         tx_status->flags =
3436             iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3437
3438         tx_status->control.tx_rate = iwl_rate_index_from_plcp(tx_resp->rate);
3439
3440         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
3441                         txq_id, iwl_get_tx_fail_reason(status), status,
3442                         tx_resp->rate, tx_resp->failure_frame);
3443
3444         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3445         if (index != -1)
3446                 iwl_tx_queue_reclaim(priv, txq_id, index);
3447
3448         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3449                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3450 }
3451
3452
3453 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3454                                struct iwl_rx_mem_buffer *rxb)
3455 {
3456         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3457         struct iwl_alive_resp *palive;
3458         struct delayed_work *pwork;
3459
3460         palive = &pkt->u.alive_frame;
3461
3462         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3463                        "0x%01X 0x%01X\n",
3464                        palive->is_valid, palive->ver_type,
3465                        palive->ver_subtype);
3466
3467         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3468                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3469                 memcpy(&priv->card_alive_init,
3470                        &pkt->u.alive_frame,
3471                        sizeof(struct iwl_init_alive_resp));
3472                 pwork = &priv->init_alive_start;
3473         } else {
3474                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3475                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3476                        sizeof(struct iwl_alive_resp));
3477                 pwork = &priv->alive_start;
3478                 iwl_disable_events(priv);
3479         }
3480
3481         /* We delay the ALIVE response by 5ms to
3482          * give the HW RF Kill time to activate... */
3483         if (palive->is_valid == UCODE_VALID_OK)
3484                 queue_delayed_work(priv->workqueue, pwork,
3485                                    msecs_to_jiffies(5));
3486         else
3487                 IWL_WARNING("uCode did not respond OK.\n");
3488 }
3489
3490 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3491                                  struct iwl_rx_mem_buffer *rxb)
3492 {
3493         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3494
3495         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3496         return;
3497 }
3498
3499 static void iwl_rx_reply_error(struct iwl_priv *priv,
3500                                struct iwl_rx_mem_buffer *rxb)
3501 {
3502         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3503
3504         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3505                 "seq 0x%04X ser 0x%08X\n",
3506                 le32_to_cpu(pkt->u.err_resp.error_type),
3507                 get_cmd_string(pkt->u.err_resp.cmd_id),
3508                 pkt->u.err_resp.cmd_id,
3509                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3510                 le32_to_cpu(pkt->u.err_resp.error_info));
3511 }
3512
3513 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3514
3515 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3516 {
3517         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3518         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3519         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3520         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3521                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3522         rxon->channel = csa->channel;
3523         priv->staging_rxon.channel = csa->channel;
3524 }
3525
3526 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3527                                           struct iwl_rx_mem_buffer *rxb)
3528 {
3529 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3530         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3531         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3532
3533         if (!report->state) {
3534                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3535                           "Spectrum Measure Notification: Start\n");
3536                 return;
3537         }
3538
3539         memcpy(&priv->measure_report, report, sizeof(*report));
3540         priv->measurement_status |= MEASUREMENT_READY;
3541 #endif
3542 }
3543
3544 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3545                                   struct iwl_rx_mem_buffer *rxb)
3546 {
3547 #ifdef CONFIG_IWLWIFI_DEBUG
3548         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3549         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3550         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3551                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3552 #endif
3553 }
3554
3555 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3556                                              struct iwl_rx_mem_buffer *rxb)
3557 {
3558         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3559         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3560                         "notification for %s:\n",
3561                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3562         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3563 }
3564
3565 static void iwl_bg_beacon_update(struct work_struct *work)
3566 {
3567         struct iwl_priv *priv =
3568                 container_of(work, struct iwl_priv, beacon_update);
3569         struct sk_buff *beacon;
3570
3571         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3572         beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3573
3574         if (!beacon) {
3575                 IWL_ERROR("update beacon failed\n");
3576                 return;
3577         }
3578
3579         mutex_lock(&priv->mutex);
3580         /* new beacon skb is allocated every time; dispose previous.*/
3581         if (priv->ibss_beacon)
3582                 dev_kfree_skb(priv->ibss_beacon);
3583
3584         priv->ibss_beacon = beacon;
3585         mutex_unlock(&priv->mutex);
3586
3587         iwl_send_beacon_cmd(priv);
3588 }
3589
3590 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3591                                 struct iwl_rx_mem_buffer *rxb)
3592 {
3593 #ifdef CONFIG_IWLWIFI_DEBUG
3594         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3595         struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3596         u8 rate = beacon->beacon_notify_hdr.rate;
3597
3598         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3599                 "tsf %d %d rate %d\n",
3600                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3601                 beacon->beacon_notify_hdr.failure_frame,
3602                 le32_to_cpu(beacon->ibss_mgr_status),
3603                 le32_to_cpu(beacon->high_tsf),
3604                 le32_to_cpu(beacon->low_tsf), rate);
3605 #endif
3606
3607         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3608             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3609                 queue_work(priv->workqueue, &priv->beacon_update);
3610 }
3611
3612 /* Service response to REPLY_SCAN_CMD (0x80) */
3613 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3614                               struct iwl_rx_mem_buffer *rxb)
3615 {
3616 #ifdef CONFIG_IWLWIFI_DEBUG
3617         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3618         struct iwl_scanreq_notification *notif =
3619             (struct iwl_scanreq_notification *)pkt->u.raw;
3620
3621         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3622 #endif
3623 }
3624
3625 /* Service SCAN_START_NOTIFICATION (0x82) */
3626 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3627                                     struct iwl_rx_mem_buffer *rxb)
3628 {
3629         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3630         struct iwl_scanstart_notification *notif =
3631             (struct iwl_scanstart_notification *)pkt->u.raw;
3632         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3633         IWL_DEBUG_SCAN("Scan start: "
3634                        "%d [802.11%s] "
3635                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3636                        notif->channel,
3637                        notif->band ? "bg" : "a",
3638                        notif->tsf_high,
3639                        notif->tsf_low, notif->status, notif->beacon_timer);
3640 }
3641
3642 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3643 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3644                                       struct iwl_rx_mem_buffer *rxb)
3645 {
3646         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3647         struct iwl_scanresults_notification *notif =
3648             (struct iwl_scanresults_notification *)pkt->u.raw;
3649
3650         IWL_DEBUG_SCAN("Scan ch.res: "
3651                        "%d [802.11%s] "
3652                        "(TSF: 0x%08X:%08X) - %d "
3653                        "elapsed=%lu usec (%dms since last)\n",
3654                        notif->channel,
3655                        notif->band ? "bg" : "a",
3656                        le32_to_cpu(notif->tsf_high),
3657                        le32_to_cpu(notif->tsf_low),
3658                        le32_to_cpu(notif->statistics[0]),
3659                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3660                        jiffies_to_msecs(elapsed_jiffies
3661                                         (priv->last_scan_jiffies, jiffies)));
3662
3663         priv->last_scan_jiffies = jiffies;
3664 }
3665
3666 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3667 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3668                                        struct iwl_rx_mem_buffer *rxb)
3669 {
3670         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3671         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3672
3673         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3674                        scan_notif->scanned_channels,
3675                        scan_notif->tsf_low,
3676                        scan_notif->tsf_high, scan_notif->status);
3677
3678         /* The HW is no longer scanning */
3679         clear_bit(STATUS_SCAN_HW, &priv->status);
3680
3681         /* The scan completion notification came in, so kill that timer... */
3682         cancel_delayed_work(&priv->scan_check);
3683
3684         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3685                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3686                        jiffies_to_msecs(elapsed_jiffies
3687                                         (priv->scan_pass_start, jiffies)));
3688
3689         /* Remove this scanned band from the list
3690          * of pending bands to scan */
3691         priv->scan_bands--;
3692
3693         /* If a request to abort was given, or the scan did not succeed
3694          * then we reset the scan state machine and terminate,
3695          * re-queuing another scan if one has been requested */
3696         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3697                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3698                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3699         } else {
3700                 /* If there are more bands on this scan pass reschedule */
3701                 if (priv->scan_bands > 0)
3702                         goto reschedule;
3703         }
3704
3705         priv->last_scan_jiffies = jiffies;
3706         IWL_DEBUG_INFO("Setting scan to off\n");
3707
3708         clear_bit(STATUS_SCANNING, &priv->status);
3709
3710         IWL_DEBUG_INFO("Scan took %dms\n",
3711                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3712
3713         queue_work(priv->workqueue, &priv->scan_completed);
3714
3715         return;
3716
3717 reschedule:
3718         priv->scan_pass_start = jiffies;
3719         queue_work(priv->workqueue, &priv->request_scan);
3720 }
3721
3722 /* Handle notification from uCode that card's power state is changing
3723  * due to software, hardware, or critical temperature RFKILL */
3724 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
3725                                     struct iwl_rx_mem_buffer *rxb)
3726 {
3727         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3728         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3729         unsigned long status = priv->status;
3730
3731         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3732                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3733                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3734
3735         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3736                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3737
3738         if (flags & HW_CARD_DISABLED)
3739                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3740         else
3741                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3742
3743
3744         if (flags & SW_CARD_DISABLED)
3745                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3746         else
3747                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3748
3749         iwl_scan_cancel(priv);
3750
3751         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3752              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3753             (test_bit(STATUS_RF_KILL_SW, &status) !=
3754              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3755                 queue_work(priv->workqueue, &priv->rf_kill);
3756         else
3757                 wake_up_interruptible(&priv->wait_command_queue);
3758 }
3759
3760 /**
3761  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
3762  *
3763  * Setup the RX handlers for each of the reply types sent from the uCode
3764  * to the host.
3765  *
3766  * This function chains into the hardware specific files for them to setup
3767  * any hardware specific handlers as well.
3768  */
3769 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
3770 {
3771         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
3772         priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
3773         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
3774         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
3775         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3776             iwl_rx_spectrum_measure_notif;
3777         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
3778         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3779             iwl_rx_pm_debug_statistics_notif;
3780         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
3781
3782         /* NOTE:  iwl_rx_statistics is different based on whether
3783          * the build is for the 3945 or the 4965.  See the
3784          * corresponding implementation in iwl-XXXX.c
3785          *
3786          * The same handler is used for both the REPLY to a
3787          * discrete statistics request from the host as well as
3788          * for the periodic statistics notification from the uCode
3789          */
3790         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
3791         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
3792
3793         priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
3794         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
3795         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3796             iwl_rx_scan_results_notif;
3797         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3798             iwl_rx_scan_complete_notif;
3799         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
3800         priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
3801
3802         /* Setup hardware specific Rx handlers */
3803         iwl_hw_rx_handler_setup(priv);
3804 }
3805
3806 /**
3807  * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3808  * @rxb: Rx buffer to reclaim
3809  *
3810  * If an Rx buffer has an async callback associated with it the callback
3811  * will be executed.  The attached skb (if present) will only be freed
3812  * if the callback returns 1
3813  */
3814 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
3815                                 struct iwl_rx_mem_buffer *rxb)
3816 {
3817         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3818         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3819         int txq_id = SEQ_TO_QUEUE(sequence);
3820         int index = SEQ_TO_INDEX(sequence);
3821         int huge = sequence & SEQ_HUGE_FRAME;
3822         int cmd_index;
3823         struct iwl_cmd *cmd;
3824
3825         /* If a Tx command is being handled and it isn't in the actual
3826          * command queue then there a command routing bug has been introduced
3827          * in the queue management code. */
3828         if (txq_id != IWL_CMD_QUEUE_NUM)
3829                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3830                           txq_id, pkt->hdr.cmd);
3831         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3832
3833         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3834         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3835
3836         /* Input error checking is done when commands are added to queue. */
3837         if (cmd->meta.flags & CMD_WANT_SKB) {
3838                 cmd->meta.source->u.skb = rxb->skb;
3839                 rxb->skb = NULL;
3840         } else if (cmd->meta.u.callback &&
3841                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3842                 rxb->skb = NULL;
3843
3844         iwl_tx_queue_reclaim(priv, txq_id, index);
3845
3846         if (!(cmd->meta.flags & CMD_ASYNC)) {
3847                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3848                 wake_up_interruptible(&priv->wait_command_queue);
3849         }
3850 }
3851
3852 /************************** RX-FUNCTIONS ****************************/
3853 /*
3854  * Rx theory of operation
3855  *
3856  * The host allocates 32 DMA target addresses and passes the host address
3857  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3858  * 0 to 31
3859  *
3860  * Rx Queue Indexes
3861  * The host/firmware share two index registers for managing the Rx buffers.
3862  *
3863  * The READ index maps to the first position that the firmware may be writing
3864  * to -- the driver can read up to (but not including) this position and get
3865  * good data.
3866  * The READ index is managed by the firmware once the card is enabled.
3867  *
3868  * The WRITE index maps to the last position the driver has read from -- the
3869  * position preceding WRITE is the last slot the firmware can place a packet.
3870  *
3871  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3872  * WRITE = READ.
3873  *
3874  * During initialization the host sets up the READ queue position to the first
3875  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3876  *
3877  * When the firmware places a packet in a buffer it will advance the READ index
3878  * and fire the RX interrupt.  The driver can then query the READ index and
3879  * process as many packets as possible, moving the WRITE index forward as it
3880  * resets the Rx queue buffers with new memory.
3881  *
3882  * The management in the driver is as follows:
3883  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3884  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3885  *   to replensish the iwl->rxq->rx_free.
3886  * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
3887  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3888  *   'processed' and 'read' driver indexes as well)
3889  * + A received packet is processed and handed to the kernel network stack,
3890  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3891  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3892  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3893  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3894  *   were enough free buffers and RX_STALLED is set it is cleared.
3895  *
3896  *
3897  * Driver sequence:
3898  *
3899  * iwl_rx_queue_alloc()       Allocates rx_free
3900  * iwl_rx_replenish()         Replenishes rx_free list from rx_used, and calls
3901  *                            iwl_rx_queue_restock
3902  * iwl_rx_queue_restock()     Moves available buffers from rx_free into Rx
3903  *                            queue, updates firmware pointers, and updates
3904  *                            the WRITE index.  If insufficient rx_free buffers
3905  *                            are available, schedules iwl_rx_replenish
3906  *
3907  * -- enable interrupts --
3908  * ISR - iwl_rx()             Detach iwl_rx_mem_buffers from pool up to the
3909  *                            READ INDEX, detaching the SKB from the pool.
3910  *                            Moves the packet buffer from queue to rx_used.
3911  *                            Calls iwl_rx_queue_restock to refill any empty
3912  *                            slots.
3913  * ...
3914  *
3915  */
3916
3917 /**
3918  * iwl_rx_queue_space - Return number of free slots available in queue.
3919  */
3920 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
3921 {
3922         int s = q->read - q->write;
3923         if (s <= 0)
3924                 s += RX_QUEUE_SIZE;
3925         /* keep some buffer to not confuse full and empty queue */
3926         s -= 2;
3927         if (s < 0)
3928                 s = 0;
3929         return s;
3930 }
3931
3932 /**
3933  * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3934  *
3935  * NOTE: This function has 3945 and 4965 specific code sections
3936  * but is declared in base due to the majority of the
3937  * implementation being the same (only a numeric constant is
3938  * different)
3939  *
3940  */
3941 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
3942 {
3943         u32 reg = 0;
3944         int rc = 0;
3945         unsigned long flags;
3946
3947         spin_lock_irqsave(&q->lock, flags);
3948
3949         if (q->need_update == 0)
3950                 goto exit_unlock;
3951
3952         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3953                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3954
3955                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3956                         iwl_set_bit(priv, CSR_GP_CNTRL,
3957                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3958                         goto exit_unlock;
3959                 }
3960
3961                 rc = iwl_grab_restricted_access(priv);
3962                 if (rc)
3963                         goto exit_unlock;
3964
3965                 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
3966                                      q->write & ~0x7);
3967                 iwl_release_restricted_access(priv);
3968         } else
3969                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3970
3971
3972         q->need_update = 0;
3973
3974  exit_unlock:
3975         spin_unlock_irqrestore(&q->lock, flags);
3976         return rc;
3977 }
3978
3979 /**
3980  * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
3981  *
3982  * NOTE: This function has 3945 and 4965 specific code paths in it.
3983  */
3984 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
3985                                           dma_addr_t dma_addr)
3986 {
3987         return cpu_to_le32((u32)dma_addr);
3988 }
3989
3990 /**
3991  * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
3992  *
3993  * If there are slots in the RX queue that  need to be restocked,
3994  * and we have free pre-allocated buffers, fill the ranks as much
3995  * as we can pulling from rx_free.
3996  *
3997  * This moves the 'write' index forward to catch up with 'processed', and
3998  * also updates the memory address in the firmware to reference the new
3999  * target buffer.
4000  */
4001 int iwl_rx_queue_restock(struct iwl_priv *priv)
4002 {
4003         struct iwl_rx_queue *rxq = &priv->rxq;
4004         struct list_head *element;
4005         struct iwl_rx_mem_buffer *rxb;
4006         unsigned long flags;
4007         int write, rc;
4008
4009         spin_lock_irqsave(&rxq->lock, flags);
4010         write = rxq->write & ~0x7;
4011         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4012                 element = rxq->rx_free.next;
4013                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4014                 list_del(element);
4015                 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4016                 rxq->queue[rxq->write] = rxb;
4017                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4018                 rxq->free_count--;
4019         }
4020         spin_unlock_irqrestore(&rxq->lock, flags);
4021         /* If the pre-allocated buffer pool is dropping low, schedule to
4022          * refill it */
4023         if (rxq->free_count <= RX_LOW_WATERMARK)
4024                 queue_work(priv->workqueue, &priv->rx_replenish);
4025
4026
4027         /* If we've added more space for the firmware to place data, tell it */
4028         if ((write != (rxq->write & ~0x7))
4029             || (abs(rxq->write - rxq->read) > 7)) {
4030                 spin_lock_irqsave(&rxq->lock, flags);
4031                 rxq->need_update = 1;
4032                 spin_unlock_irqrestore(&rxq->lock, flags);
4033                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4034                 if (rc)
4035                         return rc;
4036         }
4037
4038         return 0;
4039 }
4040
4041 /**
4042  * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4043  *
4044  * When moving to rx_free an SKB is allocated for the slot.
4045  *
4046  * Also restock the Rx queue via iwl_rx_queue_restock.
4047  * This is called as a scheduled work item (except for during intialization)
4048  */
4049 void iwl_rx_replenish(void *data)
4050 {
4051         struct iwl_priv *priv = data;
4052         struct iwl_rx_queue *rxq = &priv->rxq;
4053         struct list_head *element;
4054         struct iwl_rx_mem_buffer *rxb;
4055         unsigned long flags;
4056         spin_lock_irqsave(&rxq->lock, flags);
4057         while (!list_empty(&rxq->rx_used)) {
4058                 element = rxq->rx_used.next;
4059                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4060                 rxb->skb =
4061                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4062                 if (!rxb->skb) {
4063                         if (net_ratelimit())
4064                                 printk(KERN_CRIT DRV_NAME
4065                                        ": Can not allocate SKB buffers\n");
4066                         /* We don't reschedule replenish work here -- we will
4067                          * call the restock method and if it still needs
4068                          * more buffers it will schedule replenish */
4069                         break;
4070                 }
4071                 priv->alloc_rxb_skb++;
4072                 list_del(element);
4073                 rxb->dma_addr =
4074                     pci_map_single(priv->pci_dev, rxb->skb->data,
4075                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4076                 list_add_tail(&rxb->list, &rxq->rx_free);
4077                 rxq->free_count++;
4078         }
4079         spin_unlock_irqrestore(&rxq->lock, flags);
4080
4081         spin_lock_irqsave(&priv->lock, flags);
4082         iwl_rx_queue_restock(priv);
4083         spin_unlock_irqrestore(&priv->lock, flags);
4084 }
4085
4086 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4087  * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4088  * This free routine walks the list of POOL entries and if SKB is set to
4089  * non NULL it is unmapped and freed
4090  */
4091 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4092 {
4093         int i;
4094         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4095                 if (rxq->pool[i].skb != NULL) {
4096                         pci_unmap_single(priv->pci_dev,
4097                                          rxq->pool[i].dma_addr,
4098                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4099                         dev_kfree_skb(rxq->pool[i].skb);
4100                 }
4101         }
4102
4103         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4104                             rxq->dma_addr);
4105         rxq->bd = NULL;
4106 }
4107
4108 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4109 {
4110         struct iwl_rx_queue *rxq = &priv->rxq;
4111         struct pci_dev *dev = priv->pci_dev;
4112         int i;
4113
4114         spin_lock_init(&rxq->lock);
4115         INIT_LIST_HEAD(&rxq->rx_free);
4116         INIT_LIST_HEAD(&rxq->rx_used);
4117         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4118         if (!rxq->bd)
4119                 return -ENOMEM;
4120         /* Fill the rx_used queue with _all_ of the Rx buffers */
4121         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4122                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4123         /* Set us so that we have processed and used all buffers, but have
4124          * not restocked the Rx queue with fresh buffers */
4125         rxq->read = rxq->write = 0;
4126         rxq->free_count = 0;
4127         rxq->need_update = 0;
4128         return 0;
4129 }
4130
4131 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4132 {
4133         unsigned long flags;
4134         int i;
4135         spin_lock_irqsave(&rxq->lock, flags);
4136         INIT_LIST_HEAD(&rxq->rx_free);
4137         INIT_LIST_HEAD(&rxq->rx_used);
4138         /* Fill the rx_used queue with _all_ of the Rx buffers */
4139         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4140                 /* In the reset function, these buffers may have been allocated
4141                  * to an SKB, so we need to unmap and free potential storage */
4142                 if (rxq->pool[i].skb != NULL) {
4143                         pci_unmap_single(priv->pci_dev,
4144                                          rxq->pool[i].dma_addr,
4145                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4146                         priv->alloc_rxb_skb--;
4147                         dev_kfree_skb(rxq->pool[i].skb);
4148                         rxq->pool[i].skb = NULL;
4149                 }
4150                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4151         }
4152
4153         /* Set us so that we have processed and used all buffers, but have
4154          * not restocked the Rx queue with fresh buffers */
4155         rxq->read = rxq->write = 0;
4156         rxq->free_count = 0;
4157         spin_unlock_irqrestore(&rxq->lock, flags);
4158 }
4159
4160 /* Convert linear signal-to-noise ratio into dB */
4161 static u8 ratio2dB[100] = {
4162 /*       0   1   2   3   4   5   6   7   8   9 */
4163          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4164         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4165         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4166         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4167         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4168         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4169         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4170         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4171         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4172         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4173 };
4174
4175 /* Calculates a relative dB value from a ratio of linear
4176  *   (i.e. not dB) signal levels.
4177  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4178 int iwl_calc_db_from_ratio(int sig_ratio)
4179 {
4180         /* Anything above 1000:1 just report as 60 dB */
4181         if (sig_ratio > 1000)
4182                 return 60;
4183
4184         /* Above 100:1, divide by 10 and use table,
4185          *   add 20 dB to make up for divide by 10 */
4186         if (sig_ratio > 100)
4187                 return (20 + (int)ratio2dB[sig_ratio/10]);
4188
4189         /* We shouldn't see this */
4190         if (sig_ratio < 1)
4191                 return 0;
4192
4193         /* Use table for ratios 1:1 - 99:1 */
4194         return (int)ratio2dB[sig_ratio];
4195 }
4196
4197 #define PERFECT_RSSI (-20) /* dBm */
4198 #define WORST_RSSI (-95)   /* dBm */
4199 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4200
4201 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4202  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4203  *   about formulas used below. */
4204 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4205 {
4206         int sig_qual;
4207         int degradation = PERFECT_RSSI - rssi_dbm;
4208
4209         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4210          * as indicator; formula is (signal dbm - noise dbm).
4211          * SNR at or above 40 is a great signal (100%).
4212          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4213          * Weakest usable signal is usually 10 - 15 dB SNR. */
4214         if (noise_dbm) {
4215                 if (rssi_dbm - noise_dbm >= 40)
4216                         return 100;
4217                 else if (rssi_dbm < noise_dbm)
4218                         return 0;
4219                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4220
4221         /* Else use just the signal level.
4222          * This formula is a least squares fit of data points collected and
4223          *   compared with a reference system that had a percentage (%) display
4224          *   for signal quality. */
4225         } else
4226                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4227                             (15 * RSSI_RANGE + 62 * degradation)) /
4228                            (RSSI_RANGE * RSSI_RANGE);
4229
4230         if (sig_qual > 100)
4231                 sig_qual = 100;
4232         else if (sig_qual < 1)
4233                 sig_qual = 0;
4234
4235         return sig_qual;
4236 }
4237
4238 /**
4239  * iwl_rx_handle - Main entry function for receiving responses from the uCode
4240  *
4241  * Uses the priv->rx_handlers callback function array to invoke
4242  * the appropriate handlers, including command responses,
4243  * frame-received notifications, and other notifications.
4244  */
4245 static void iwl_rx_handle(struct iwl_priv *priv)
4246 {
4247         struct iwl_rx_mem_buffer *rxb;
4248         struct iwl_rx_packet *pkt;
4249         struct iwl_rx_queue *rxq = &priv->rxq;
4250         u32 r, i;
4251         int reclaim;
4252         unsigned long flags;
4253
4254         r = iwl_hw_get_rx_read(priv);
4255         i = rxq->read;
4256
4257         /* Rx interrupt, but nothing sent from uCode */
4258         if (i == r)
4259                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4260
4261         while (i != r) {
4262                 rxb = rxq->queue[i];
4263
4264                 /* If an RXB doesn't have a queue slot associated with it
4265                  * then a bug has been introduced in the queue refilling
4266                  * routines -- catch it here */
4267                 BUG_ON(rxb == NULL);
4268
4269                 rxq->queue[i] = NULL;
4270
4271                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4272                                             IWL_RX_BUF_SIZE,
4273                                             PCI_DMA_FROMDEVICE);
4274                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4275
4276                 /* Reclaim a command buffer only if this packet is a response
4277                  *   to a (driver-originated) command.
4278                  * If the packet (e.g. Rx frame) originated from uCode,
4279                  *   there is no command buffer to reclaim.
4280                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4281                  *   but apparently a few don't get set; catch them here. */
4282                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4283                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4284                         (pkt->hdr.cmd != REPLY_TX);
4285
4286                 /* Based on type of command response or notification,
4287                  *   handle those that need handling via function in
4288                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
4289                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4290                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4291                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4292                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4293                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4294                 } else {
4295                         /* No handling needed */
4296                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4297                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4298                                 r, i, get_cmd_string(pkt->hdr.cmd),
4299                                 pkt->hdr.cmd);
4300                 }
4301
4302                 if (reclaim) {
4303                         /* Invoke any callbacks, transfer the skb to caller,
4304                          * and fire off the (possibly) blocking iwl_send_cmd()
4305                          * as we reclaim the driver command queue */
4306                         if (rxb && rxb->skb)
4307                                 iwl_tx_cmd_complete(priv, rxb);
4308                         else
4309                                 IWL_WARNING("Claim null rxb?\n");
4310                 }
4311
4312                 /* For now we just don't re-use anything.  We can tweak this
4313                  * later to try and re-use notification packets and SKBs that
4314                  * fail to Rx correctly */
4315                 if (rxb->skb != NULL) {
4316                         priv->alloc_rxb_skb--;
4317                         dev_kfree_skb_any(rxb->skb);
4318                         rxb->skb = NULL;
4319                 }
4320
4321                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4322                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4323                 spin_lock_irqsave(&rxq->lock, flags);
4324                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4325                 spin_unlock_irqrestore(&rxq->lock, flags);
4326                 i = (i + 1) & RX_QUEUE_MASK;
4327         }
4328
4329         /* Backtrack one entry */
4330         priv->rxq.read = i;
4331         iwl_rx_queue_restock(priv);
4332 }
4333
4334 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4335                                   struct iwl_tx_queue *txq)
4336 {
4337         u32 reg = 0;
4338         int rc = 0;
4339         int txq_id = txq->q.id;
4340
4341         if (txq->need_update == 0)
4342                 return rc;
4343
4344         /* if we're trying to save power */
4345         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4346                 /* wake up nic if it's powered down ...
4347                  * uCode will wake up, and interrupt us again, so next
4348                  * time we'll skip this part. */
4349                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4350
4351                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4352                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4353                         iwl_set_bit(priv, CSR_GP_CNTRL,
4354                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4355                         return rc;
4356                 }
4357
4358                 /* restore this queue's parameters in nic hardware. */
4359                 rc = iwl_grab_restricted_access(priv);
4360                 if (rc)
4361                         return rc;
4362                 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4363                                      txq->q.first_empty | (txq_id << 8));
4364                 iwl_release_restricted_access(priv);
4365
4366         /* else not in power-save mode, uCode will never sleep when we're
4367          * trying to tx (during RFKILL, we're not trying to tx). */
4368         } else
4369                 iwl_write32(priv, HBUS_TARG_WRPTR,
4370                             txq->q.first_empty | (txq_id << 8));
4371
4372         txq->need_update = 0;
4373
4374         return rc;
4375 }
4376
4377 #ifdef CONFIG_IWLWIFI_DEBUG
4378 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4379 {
4380         DECLARE_MAC_BUF(mac);
4381
4382         IWL_DEBUG_RADIO("RX CONFIG:\n");
4383         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4384         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4385         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4386         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4387                         le32_to_cpu(rxon->filter_flags));
4388         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4389         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4390                         rxon->ofdm_basic_rates);
4391         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4392         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4393                         print_mac(mac, rxon->node_addr));
4394         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4395                         print_mac(mac, rxon->bssid_addr));
4396         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4397 }
4398 #endif
4399
4400 static void iwl_enable_interrupts(struct iwl_priv *priv)
4401 {
4402         IWL_DEBUG_ISR("Enabling interrupts\n");
4403         set_bit(STATUS_INT_ENABLED, &priv->status);
4404         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4405 }
4406
4407 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4408 {
4409         clear_bit(STATUS_INT_ENABLED, &priv->status);
4410
4411         /* disable interrupts from uCode/NIC to host */
4412         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4413
4414         /* acknowledge/clear/reset any interrupts still pending
4415          * from uCode or flow handler (Rx/Tx DMA) */
4416         iwl_write32(priv, CSR_INT, 0xffffffff);
4417         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4418         IWL_DEBUG_ISR("Disabled interrupts\n");
4419 }
4420
4421 static const char *desc_lookup(int i)
4422 {
4423         switch (i) {
4424         case 1:
4425                 return "FAIL";
4426         case 2:
4427                 return "BAD_PARAM";
4428         case 3:
4429                 return "BAD_CHECKSUM";
4430         case 4:
4431                 return "NMI_INTERRUPT";
4432         case 5:
4433                 return "SYSASSERT";
4434         case 6:
4435                 return "FATAL_ERROR";
4436         }
4437
4438         return "UNKNOWN";
4439 }
4440
4441 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4442 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4443
4444 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4445 {
4446         u32 i;
4447         u32 desc, time, count, base, data1;
4448         u32 blink1, blink2, ilink1, ilink2;
4449         int rc;
4450
4451         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4452
4453         if (!iwl_hw_valid_rtc_data_addr(base)) {
4454                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4455                 return;
4456         }
4457
4458         rc = iwl_grab_restricted_access(priv);
4459         if (rc) {
4460                 IWL_WARNING("Can not read from adapter at this time.\n");
4461                 return;
4462         }
4463
4464         count = iwl_read_restricted_mem(priv, base);
4465
4466         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4467                 IWL_ERROR("Start IWL Error Log Dump:\n");
4468                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4469                           priv->status, priv->config, count);
4470         }
4471
4472         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4473                   "ilink1  nmiPC   Line\n");
4474         for (i = ERROR_START_OFFSET;
4475              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4476              i += ERROR_ELEM_SIZE) {
4477                 desc = iwl_read_restricted_mem(priv, base + i);
4478                 time =
4479                     iwl_read_restricted_mem(priv, base + i + 1 * sizeof(u32));
4480                 blink1 =
4481                     iwl_read_restricted_mem(priv, base + i + 2 * sizeof(u32));
4482                 blink2 =
4483                     iwl_read_restricted_mem(priv, base + i + 3 * sizeof(u32));
4484                 ilink1 =
4485                     iwl_read_restricted_mem(priv, base + i + 4 * sizeof(u32));
4486                 ilink2 =
4487                     iwl_read_restricted_mem(priv, base + i + 5 * sizeof(u32));
4488                 data1 =
4489                     iwl_read_restricted_mem(priv, base + i + 6 * sizeof(u32));
4490
4491                 IWL_ERROR
4492                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4493                      desc_lookup(desc), desc, time, blink1, blink2,
4494                      ilink1, ilink2, data1);
4495         }
4496
4497         iwl_release_restricted_access(priv);
4498
4499 }
4500
4501 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4502
4503 /**
4504  * iwl_print_event_log - Dump error event log to syslog
4505  *
4506  * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4507  */
4508 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4509                                 u32 num_events, u32 mode)
4510 {
4511         u32 i;
4512         u32 base;       /* SRAM byte address of event log header */
4513         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4514         u32 ptr;        /* SRAM byte address of log data */
4515         u32 ev, time, data; /* event log data */
4516
4517         if (num_events == 0)
4518                 return;
4519
4520         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4521
4522         if (mode == 0)
4523                 event_size = 2 * sizeof(u32);
4524         else
4525                 event_size = 3 * sizeof(u32);
4526
4527         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4528
4529         /* "time" is actually "data" for mode 0 (no timestamp).
4530          * place event id # at far right for easier visual parsing. */
4531         for (i = 0; i < num_events; i++) {
4532                 ev = iwl_read_restricted_mem(priv, ptr);
4533                 ptr += sizeof(u32);
4534                 time = iwl_read_restricted_mem(priv, ptr);
4535                 ptr += sizeof(u32);
4536                 if (mode == 0)
4537                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4538                 else {
4539                         data = iwl_read_restricted_mem(priv, ptr);
4540                         ptr += sizeof(u32);
4541                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4542                 }
4543         }
4544 }
4545
4546 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4547 {
4548         int rc;
4549         u32 base;       /* SRAM byte address of event log header */
4550         u32 capacity;   /* event log capacity in # entries */
4551         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4552         u32 num_wraps;  /* # times uCode wrapped to top of log */
4553         u32 next_entry; /* index of next entry to be written by uCode */
4554         u32 size;       /* # entries that we'll print */
4555
4556         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4557         if (!iwl_hw_valid_rtc_data_addr(base)) {
4558                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4559                 return;
4560         }
4561
4562         rc = iwl_grab_restricted_access(priv);
4563         if (rc) {
4564                 IWL_WARNING("Can not read from adapter at this time.\n");
4565                 return;
4566         }
4567
4568         /* event log header */
4569         capacity = iwl_read_restricted_mem(priv, base);
4570         mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4571         num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4572         next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4573
4574         size = num_wraps ? capacity : next_entry;
4575
4576         /* bail out if nothing in log */
4577         if (size == 0) {
4578                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4579                 iwl_release_restricted_access(priv);
4580                 return;
4581         }
4582
4583         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4584                   size, num_wraps);
4585
4586         /* if uCode has wrapped back to top of log, start at the oldest entry,
4587          * i.e the next one that uCode would fill. */
4588         if (num_wraps)
4589                 iwl_print_event_log(priv, next_entry,
4590                                     capacity - next_entry, mode);
4591
4592         /* (then/else) start at top of log */
4593         iwl_print_event_log(priv, 0, next_entry, mode);
4594
4595         iwl_release_restricted_access(priv);
4596 }
4597
4598 /**
4599  * iwl_irq_handle_error - called for HW or SW error interrupt from card
4600  */
4601 static void iwl_irq_handle_error(struct iwl_priv *priv)
4602 {
4603         /* Set the FW error flag -- cleared on iwl_down */
4604         set_bit(STATUS_FW_ERROR, &priv->status);
4605
4606         /* Cancel currently queued command. */
4607         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4608
4609 #ifdef CONFIG_IWLWIFI_DEBUG
4610         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4611                 iwl_dump_nic_error_log(priv);
4612                 iwl_dump_nic_event_log(priv);
4613                 iwl_print_rx_config_cmd(&priv->staging_rxon);
4614         }
4615 #endif
4616
4617         wake_up_interruptible(&priv->wait_command_queue);
4618
4619         /* Keep the restart process from trying to send host
4620          * commands by clearing the INIT status bit */
4621         clear_bit(STATUS_READY, &priv->status);
4622
4623         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4624                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4625                           "Restarting adapter due to uCode error.\n");
4626
4627                 if (iwl_is_associated(priv)) {
4628                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4629                                sizeof(priv->recovery_rxon));
4630                         priv->error_recovering = 1;
4631                 }
4632                 queue_work(priv->workqueue, &priv->restart);
4633         }
4634 }
4635
4636 static void iwl_error_recovery(struct iwl_priv *priv)
4637 {
4638         unsigned long flags;
4639
4640         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4641                sizeof(priv->staging_rxon));
4642         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4643         iwl_commit_rxon(priv);
4644
4645         iwl_add_station(priv, priv->bssid, 1, 0);
4646
4647         spin_lock_irqsave(&priv->lock, flags);
4648         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4649         priv->error_recovering = 0;
4650         spin_unlock_irqrestore(&priv->lock, flags);
4651 }
4652
4653 static void iwl_irq_tasklet(struct iwl_priv *priv)
4654 {
4655         u32 inta, handled = 0;
4656         u32 inta_fh;
4657         unsigned long flags;
4658 #ifdef CONFIG_IWLWIFI_DEBUG
4659         u32 inta_mask;
4660 #endif
4661
4662         spin_lock_irqsave(&priv->lock, flags);
4663
4664         /* Ack/clear/reset pending uCode interrupts.
4665          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4666          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4667         inta = iwl_read32(priv, CSR_INT);
4668         iwl_write32(priv, CSR_INT, inta);
4669
4670         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4671          * Any new interrupts that happen after this, either while we're
4672          * in this tasklet, or later, will show up in next ISR/tasklet. */
4673         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4674         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4675
4676 #ifdef CONFIG_IWLWIFI_DEBUG
4677         if (iwl_debug_level & IWL_DL_ISR) {
4678                 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
4679                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4680                               inta, inta_mask, inta_fh);
4681         }
4682 #endif
4683
4684         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4685          * atomic, make sure that inta covers all the interrupts that
4686          * we've discovered, even if FH interrupt came in just after
4687          * reading CSR_INT. */
4688         if (inta_fh & CSR_FH_INT_RX_MASK)
4689                 inta |= CSR_INT_BIT_FH_RX;
4690         if (inta_fh & CSR_FH_INT_TX_MASK)
4691                 inta |= CSR_INT_BIT_FH_TX;
4692
4693         /* Now service all interrupt bits discovered above. */
4694         if (inta & CSR_INT_BIT_HW_ERR) {
4695                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4696
4697                 /* Tell the device to stop sending interrupts */
4698                 iwl_disable_interrupts(priv);
4699
4700                 iwl_irq_handle_error(priv);
4701
4702                 handled |= CSR_INT_BIT_HW_ERR;
4703
4704                 spin_unlock_irqrestore(&priv->lock, flags);
4705
4706                 return;
4707         }
4708
4709 #ifdef CONFIG_IWLWIFI_DEBUG
4710         if (iwl_debug_level & (IWL_DL_ISR)) {
4711                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4712                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
4713                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
4714
4715                 /* Alive notification via Rx interrupt will do the real work */
4716                 if (inta & CSR_INT_BIT_ALIVE)
4717                         IWL_DEBUG_ISR("Alive interrupt\n");
4718         }
4719 #endif
4720         /* Safely ignore these bits for debug checks below */
4721         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
4722
4723         /* HW RF KILL switch toggled (4965 only) */
4724         if (inta & CSR_INT_BIT_RF_KILL) {
4725                 int hw_rf_kill = 0;
4726                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4727                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4728                         hw_rf_kill = 1;
4729
4730                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4731                                 "RF_KILL bit toggled to %s.\n",
4732                                 hw_rf_kill ? "disable radio":"enable radio");
4733
4734                 /* Queue restart only if RF_KILL switch was set to "kill"
4735                  *   when we loaded driver, and is now set to "enable".
4736                  * After we're Alive, RF_KILL gets handled by
4737                  *   iwl_rx_card_state_notif() */
4738                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
4739                         queue_work(priv->workqueue, &priv->restart);
4740
4741                 handled |= CSR_INT_BIT_RF_KILL;
4742         }
4743
4744         /* Chip got too hot and stopped itself (4965 only) */
4745         if (inta & CSR_INT_BIT_CT_KILL) {
4746                 IWL_ERROR("Microcode CT kill error detected.\n");
4747                 handled |= CSR_INT_BIT_CT_KILL;
4748         }
4749
4750         /* Error detected by uCode */
4751         if (inta & CSR_INT_BIT_SW_ERR) {
4752                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4753                           inta);
4754                 iwl_irq_handle_error(priv);
4755                 handled |= CSR_INT_BIT_SW_ERR;
4756         }
4757
4758         /* uCode wakes up after power-down sleep */
4759         if (inta & CSR_INT_BIT_WAKEUP) {
4760                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4761                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
4762                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4763                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4764                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4765                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4766                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4767                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4768
4769                 handled |= CSR_INT_BIT_WAKEUP;
4770         }
4771
4772         /* All uCode command responses, including Tx command responses,
4773          * Rx "responses" (frame-received notification), and other
4774          * notifications from uCode come through here*/
4775         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4776                 iwl_rx_handle(priv);
4777                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4778         }
4779
4780         if (inta & CSR_INT_BIT_FH_TX) {
4781                 IWL_DEBUG_ISR("Tx interrupt\n");
4782
4783                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4784                 if (!iwl_grab_restricted_access(priv)) {
4785                         iwl_write_restricted(priv,
4786                                              FH_TCSR_CREDIT
4787                                              (ALM_FH_SRVC_CHNL), 0x0);
4788                         iwl_release_restricted_access(priv);
4789                 }
4790                 handled |= CSR_INT_BIT_FH_TX;
4791         }
4792
4793         if (inta & ~handled)
4794                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4795
4796         if (inta & ~CSR_INI_SET_MASK) {
4797                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4798                          inta & ~CSR_INI_SET_MASK);
4799                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4800         }
4801
4802         /* Re-enable all interrupts */
4803         iwl_enable_interrupts(priv);
4804
4805 #ifdef CONFIG_IWLWIFI_DEBUG
4806         if (iwl_debug_level & (IWL_DL_ISR)) {
4807                 inta = iwl_read32(priv, CSR_INT);
4808                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4809                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4810                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4811                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4812         }
4813 #endif
4814         spin_unlock_irqrestore(&priv->lock, flags);
4815 }
4816
4817 static irqreturn_t iwl_isr(int irq, void *data)
4818 {
4819         struct iwl_priv *priv = data;
4820         u32 inta, inta_mask;
4821         u32 inta_fh;
4822         if (!priv)
4823                 return IRQ_NONE;
4824
4825         spin_lock(&priv->lock);
4826
4827         /* Disable (but don't clear!) interrupts here to avoid
4828          *    back-to-back ISRs and sporadic interrupts from our NIC.
4829          * If we have something to service, the tasklet will re-enable ints.
4830          * If we *don't* have something, we'll re-enable before leaving here. */
4831         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4832         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4833
4834         /* Discover which interrupts are active/pending */
4835         inta = iwl_read32(priv, CSR_INT);
4836         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4837
4838         /* Ignore interrupt if there's nothing in NIC to service.
4839          * This may be due to IRQ shared with another device,
4840          * or due to sporadic interrupts thrown from our NIC. */
4841         if (!inta && !inta_fh) {
4842                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4843                 goto none;
4844         }
4845
4846         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4847                 /* Hardware disappeared */
4848                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4849                 goto none;
4850         }
4851
4852         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4853                       inta, inta_mask, inta_fh);
4854
4855         /* iwl_irq_tasklet() will service interrupts and re-enable them */
4856         tasklet_schedule(&priv->irq_tasklet);
4857         spin_unlock(&priv->lock);
4858
4859         return IRQ_HANDLED;
4860
4861  none:
4862         /* re-enable interrupts here since we don't have anything to service. */
4863         iwl_enable_interrupts(priv);
4864         spin_unlock(&priv->lock);
4865         return IRQ_NONE;
4866 }
4867
4868 /************************** EEPROM BANDS ****************************
4869  *
4870  * The iwl_eeprom_band definitions below provide the mapping from the
4871  * EEPROM contents to the specific channel number supported for each
4872  * band.
4873  *
4874  * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
4875  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4876  * The specific geography and calibration information for that channel
4877  * is contained in the eeprom map itself.
4878  *
4879  * During init, we copy the eeprom information and channel map
4880  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4881  *
4882  * channel_map_24/52 provides the index in the channel_info array for a
4883  * given channel.  We have to have two separate maps as there is channel
4884  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4885  * band_2
4886  *
4887  * A value of 0xff stored in the channel_map indicates that the channel
4888  * is not supported by the hardware at all.
4889  *
4890  * A value of 0xfe in the channel_map indicates that the channel is not
4891  * valid for Tx with the current hardware.  This means that
4892  * while the system can tune and receive on a given channel, it may not
4893  * be able to associate or transmit any frames on that
4894  * channel.  There is no corresponding channel information for that
4895  * entry.
4896  *
4897  *********************************************************************/
4898
4899 /* 2.4 GHz */
4900 static const u8 iwl_eeprom_band_1[14] = {
4901         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4902 };
4903
4904 /* 5.2 GHz bands */
4905 static const u8 iwl_eeprom_band_2[] = {
4906         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4907 };
4908
4909 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
4910         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4911 };
4912
4913 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
4914         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4915 };
4916
4917 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
4918         145, 149, 153, 157, 161, 165
4919 };
4920
4921 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
4922                                     int *eeprom_ch_count,
4923                                     const struct iwl_eeprom_channel
4924                                     **eeprom_ch_info,
4925                                     const u8 **eeprom_ch_index)
4926 {
4927         switch (band) {
4928         case 1:         /* 2.4GHz band */
4929                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
4930                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4931                 *eeprom_ch_index = iwl_eeprom_band_1;
4932                 break;
4933         case 2:         /* 5.2GHz band */
4934                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
4935                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4936                 *eeprom_ch_index = iwl_eeprom_band_2;
4937                 break;
4938         case 3:         /* 5.2GHz band */
4939                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
4940                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4941                 *eeprom_ch_index = iwl_eeprom_band_3;
4942                 break;
4943         case 4:         /* 5.2GHz band */
4944                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
4945                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4946                 *eeprom_ch_index = iwl_eeprom_band_4;
4947                 break;
4948         case 5:         /* 5.2GHz band */
4949                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
4950                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4951                 *eeprom_ch_index = iwl_eeprom_band_5;
4952                 break;
4953         default:
4954                 BUG();
4955                 return;
4956         }
4957 }
4958
4959 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
4960                                                     int phymode, u16 channel)
4961 {
4962         int i;
4963
4964         switch (phymode) {
4965         case MODE_IEEE80211A:
4966                 for (i = 14; i < priv->channel_count; i++) {
4967                         if (priv->channel_info[i].channel == channel)
4968                                 return &priv->channel_info[i];
4969                 }
4970                 break;
4971
4972         case MODE_IEEE80211B:
4973         case MODE_IEEE80211G:
4974                 if (channel >= 1 && channel <= 14)
4975                         return &priv->channel_info[channel - 1];
4976                 break;
4977
4978         }
4979
4980         return NULL;
4981 }
4982
4983 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4984                             ? # x " " : "")
4985
4986 static int iwl_init_channel_map(struct iwl_priv *priv)
4987 {
4988         int eeprom_ch_count = 0;
4989         const u8 *eeprom_ch_index = NULL;
4990         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
4991         int band, ch;
4992         struct iwl_channel_info *ch_info;
4993
4994         if (priv->channel_count) {
4995                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4996                 return 0;
4997         }
4998
4999         if (priv->eeprom.version < 0x2f) {
5000                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5001                             priv->eeprom.version);
5002                 return -EINVAL;
5003         }
5004
5005         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5006
5007         priv->channel_count =
5008             ARRAY_SIZE(iwl_eeprom_band_1) +
5009             ARRAY_SIZE(iwl_eeprom_band_2) +
5010             ARRAY_SIZE(iwl_eeprom_band_3) +
5011             ARRAY_SIZE(iwl_eeprom_band_4) +
5012             ARRAY_SIZE(iwl_eeprom_band_5);
5013
5014         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5015
5016         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5017                                      priv->channel_count, GFP_KERNEL);
5018         if (!priv->channel_info) {
5019                 IWL_ERROR("Could not allocate channel_info\n");
5020                 priv->channel_count = 0;
5021                 return -ENOMEM;
5022         }
5023
5024         ch_info = priv->channel_info;
5025
5026         /* Loop through the 5 EEPROM bands adding them in order to the
5027          * channel map we maintain (that contains additional information than
5028          * what just in the EEPROM) */
5029         for (band = 1; band <= 5; band++) {
5030
5031                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5032                                         &eeprom_ch_info, &eeprom_ch_index);
5033
5034                 /* Loop through each band adding each of the channels */
5035                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5036                         ch_info->channel = eeprom_ch_index[ch];
5037                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5038                             MODE_IEEE80211A;
5039
5040                         /* permanently store EEPROM's channel regulatory flags
5041                          *   and max power in channel info database. */
5042                         ch_info->eeprom = eeprom_ch_info[ch];
5043
5044                         /* Copy the run-time flags so they are there even on
5045                          * invalid channels */
5046                         ch_info->flags = eeprom_ch_info[ch].flags;
5047
5048                         if (!(is_channel_valid(ch_info))) {
5049                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5050                                                "No traffic\n",
5051                                                ch_info->channel,
5052                                                ch_info->flags,
5053                                                is_channel_a_band(ch_info) ?
5054                                                "5.2" : "2.4");
5055                                 ch_info++;
5056                                 continue;
5057                         }
5058
5059                         /* Initialize regulatory-based run-time data */
5060                         ch_info->max_power_avg = ch_info->curr_txpow =
5061                             eeprom_ch_info[ch].max_power_avg;
5062                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5063                         ch_info->min_power = 0;
5064
5065                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5066                                        " %ddBm): Ad-Hoc %ssupported\n",
5067                                        ch_info->channel,
5068                                        is_channel_a_band(ch_info) ?
5069                                        "5.2" : "2.4",
5070                                        CHECK_AND_PRINT(IBSS),
5071                                        CHECK_AND_PRINT(ACTIVE),
5072                                        CHECK_AND_PRINT(RADAR),
5073                                        CHECK_AND_PRINT(WIDE),
5074                                        CHECK_AND_PRINT(NARROW),
5075                                        CHECK_AND_PRINT(DFS),
5076                                        eeprom_ch_info[ch].flags,
5077                                        eeprom_ch_info[ch].max_power_avg,
5078                                        ((eeprom_ch_info[ch].
5079                                          flags & EEPROM_CHANNEL_IBSS)
5080                                         && !(eeprom_ch_info[ch].
5081                                              flags & EEPROM_CHANNEL_RADAR))
5082                                        ? "" : "not ");
5083
5084                         /* Set the user_txpower_limit to the highest power
5085                          * supported by any channel */
5086                         if (eeprom_ch_info[ch].max_power_avg >
5087                             priv->user_txpower_limit)
5088                                 priv->user_txpower_limit =
5089                                     eeprom_ch_info[ch].max_power_avg;
5090
5091                         ch_info++;
5092                 }
5093         }
5094
5095         if (iwl3945_txpower_set_from_eeprom(priv))
5096                 return -EIO;
5097
5098         return 0;
5099 }
5100
5101 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5102  * sending probe req.  This should be set long enough to hear probe responses
5103  * from more than one AP.  */
5104 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5105 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5106
5107 /* For faster active scanning, scan will move to the next channel if fewer than
5108  * PLCP_QUIET_THRESH packets are heard on this channel within
5109  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5110  * time if it's a quiet channel (nothing responded to our probe, and there's
5111  * no other traffic).
5112  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5113 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5114 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5115
5116 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5117  * Must be set longer than active dwell time.
5118  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5119 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5120 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5121 #define IWL_PASSIVE_DWELL_BASE      (100)
5122 #define IWL_CHANNEL_TUNE_TIME       5
5123
5124 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5125 {
5126         if (phymode == MODE_IEEE80211A)
5127                 return IWL_ACTIVE_DWELL_TIME_52;
5128         else
5129                 return IWL_ACTIVE_DWELL_TIME_24;
5130 }
5131
5132 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5133 {
5134         u16 active = iwl_get_active_dwell_time(priv, phymode);
5135         u16 passive = (phymode != MODE_IEEE80211A) ?
5136             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5137             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5138
5139         if (iwl_is_associated(priv)) {
5140                 /* If we're associated, we clamp the maximum passive
5141                  * dwell time to be 98% of the beacon interval (minus
5142                  * 2 * channel tune time) */
5143                 passive = priv->beacon_int;
5144                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5145                         passive = IWL_PASSIVE_DWELL_BASE;
5146                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5147         }
5148
5149         if (passive <= active)
5150                 passive = active + 1;
5151
5152         return passive;
5153 }
5154
5155 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5156                                      u8 is_active, u8 direct_mask,
5157                                      struct iwl_scan_channel *scan_ch)
5158 {
5159         const struct ieee80211_channel *channels = NULL;
5160         const struct ieee80211_hw_mode *hw_mode;
5161         const struct iwl_channel_info *ch_info;
5162         u16 passive_dwell = 0;
5163         u16 active_dwell = 0;
5164         int added, i;
5165
5166         hw_mode = iwl_get_hw_mode(priv, phymode);
5167         if (!hw_mode)
5168                 return 0;
5169
5170         channels = hw_mode->channels;
5171
5172         active_dwell = iwl_get_active_dwell_time(priv, phymode);
5173         passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5174
5175         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5176                 if (channels[i].chan ==
5177                     le16_to_cpu(priv->active_rxon.channel)) {
5178                         if (iwl_is_associated(priv)) {
5179                                 IWL_DEBUG_SCAN
5180                                     ("Skipping current channel %d\n",
5181                                      le16_to_cpu(priv->active_rxon.channel));
5182                                 continue;
5183                         }
5184                 } else if (priv->only_active_channel)
5185                         continue;
5186
5187                 scan_ch->channel = channels[i].chan;
5188
5189                 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5190                 if (!is_channel_valid(ch_info)) {
5191                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5192                                        scan_ch->channel);
5193                         continue;
5194                 }
5195
5196                 if (!is_active || is_channel_passive(ch_info) ||
5197                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5198                         scan_ch->type = 0;      /* passive */
5199                 else
5200                         scan_ch->type = 1;      /* active */
5201
5202                 if (scan_ch->type & 1)
5203                         scan_ch->type |= (direct_mask << 1);
5204
5205                 if (is_channel_narrow(ch_info))
5206                         scan_ch->type |= (1 << 7);
5207
5208                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5209                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5210
5211                 /* Set power levels to defaults */
5212                 scan_ch->tpc.dsp_atten = 110;
5213                 /* scan_pwr_info->tpc.dsp_atten; */
5214
5215                 /*scan_pwr_info->tpc.tx_gain; */
5216                 if (phymode == MODE_IEEE80211A)
5217                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5218                 else {
5219                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5220                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5221                          * power level
5222                          scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5223                          */
5224                 }
5225
5226                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5227                                scan_ch->channel,
5228                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5229                                (scan_ch->type & 1) ?
5230                                active_dwell : passive_dwell);
5231
5232                 scan_ch++;
5233                 added++;
5234         }
5235
5236         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5237         return added;
5238 }
5239
5240 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5241 {
5242         int i, j;
5243         for (i = 0; i < 3; i++) {
5244                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5245                 for (j = 0; j < hw_mode->num_channels; j++)
5246                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5247         }
5248 }
5249
5250 static void iwl_init_hw_rates(struct iwl_priv *priv,
5251                               struct ieee80211_rate *rates)
5252 {
5253         int i;
5254
5255         for (i = 0; i < IWL_RATE_COUNT; i++) {
5256                 rates[i].rate = iwl_rates[i].ieee * 5;
5257                 rates[i].val = i; /* Rate scaling will work on indexes */
5258                 rates[i].val2 = i;
5259                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5260                 /* Only OFDM have the bits-per-symbol set */
5261                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5262                         rates[i].flags |= IEEE80211_RATE_OFDM;
5263                 else {
5264                         /*
5265                          * If CCK 1M then set rate flag to CCK else CCK_2
5266                          * which is CCK | PREAMBLE2
5267                          */
5268                         rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5269                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5270                 }
5271
5272                 /* Set up which ones are basic rates... */
5273                 if (IWL_BASIC_RATES_MASK & (1 << i))
5274                         rates[i].flags |= IEEE80211_RATE_BASIC;
5275         }
5276 }
5277
5278 /**
5279  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5280  */
5281 static int iwl_init_geos(struct iwl_priv *priv)
5282 {
5283         struct iwl_channel_info *ch;
5284         struct ieee80211_hw_mode *modes;
5285         struct ieee80211_channel *channels;
5286         struct ieee80211_channel *geo_ch;
5287         struct ieee80211_rate *rates;
5288         int i = 0;
5289         enum {
5290                 A = 0,
5291                 B = 1,
5292                 G = 2,
5293         };
5294         int mode_count = 3;
5295
5296         if (priv->modes) {
5297                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5298                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5299                 return 0;
5300         }
5301
5302         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5303                         GFP_KERNEL);
5304         if (!modes)
5305                 return -ENOMEM;
5306
5307         channels = kzalloc(sizeof(struct ieee80211_channel) *
5308                            priv->channel_count, GFP_KERNEL);
5309         if (!channels) {
5310                 kfree(modes);
5311                 return -ENOMEM;
5312         }
5313
5314         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5315                         GFP_KERNEL);
5316         if (!rates) {
5317                 kfree(modes);
5318                 kfree(channels);
5319                 return -ENOMEM;
5320         }
5321
5322         /* 0 = 802.11a
5323          * 1 = 802.11b
5324          * 2 = 802.11g
5325          */
5326
5327         /* 5.2GHz channels start after the 2.4GHz channels */
5328         modes[A].mode = MODE_IEEE80211A;
5329         modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5330         modes[A].rates = rates;
5331         modes[A].num_rates = 8; /* just OFDM */
5332         modes[A].num_channels = 0;
5333
5334         modes[B].mode = MODE_IEEE80211B;
5335         modes[B].channels = channels;
5336         modes[B].rates = &rates[8];
5337         modes[B].num_rates = 4; /* just CCK */
5338         modes[B].num_channels = 0;
5339
5340         modes[G].mode = MODE_IEEE80211G;
5341         modes[G].channels = channels;
5342         modes[G].rates = rates;
5343         modes[G].num_rates = 12;        /* OFDM & CCK */
5344         modes[G].num_channels = 0;
5345
5346         priv->ieee_channels = channels;
5347         priv->ieee_rates = rates;
5348
5349         iwl_init_hw_rates(priv, rates);
5350
5351         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5352                 ch = &priv->channel_info[i];
5353
5354                 if (!is_channel_valid(ch)) {
5355                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5356                                     "skipping.\n",
5357                                     ch->channel, is_channel_a_band(ch) ?
5358                                     "5.2" : "2.4");
5359                         continue;
5360                 }
5361
5362                 if (is_channel_a_band(ch))
5363                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5364                 else {
5365                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5366                         modes[G].num_channels++;
5367                 }
5368
5369                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5370                 geo_ch->chan = ch->channel;
5371                 geo_ch->power_level = ch->max_power_avg;
5372                 geo_ch->antenna_max = 0xff;
5373
5374                 if (is_channel_valid(ch)) {
5375                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5376                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5377                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5378
5379                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5380                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5381
5382                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5383                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5384
5385                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5386                                 priv->max_channel_txpower_limit =
5387                                     ch->max_power_avg;
5388                 }
5389
5390                 geo_ch->val = geo_ch->flag;
5391         }
5392
5393         if ((modes[A].num_channels == 0) && priv->is_abg) {
5394                 printk(KERN_INFO DRV_NAME
5395                        ": Incorrectly detected BG card as ABG.  Please send "
5396                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5397                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5398                 priv->is_abg = 0;
5399         }
5400
5401         printk(KERN_INFO DRV_NAME
5402                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5403                modes[G].num_channels, modes[A].num_channels);
5404
5405         /*
5406          * NOTE:  We register these in preference of order -- the
5407          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5408          * a phymode based on rates or AP capabilities but seems to
5409          * configure it purely on if the channel being configured
5410          * is supported by a mode -- and the first match is taken
5411          */
5412
5413         if (modes[G].num_channels)
5414                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5415         if (modes[B].num_channels)
5416                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5417         if (modes[A].num_channels)
5418                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5419
5420         priv->modes = modes;
5421         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5422
5423         return 0;
5424 }
5425
5426 /******************************************************************************
5427  *
5428  * uCode download functions
5429  *
5430  ******************************************************************************/
5431
5432 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5433 {
5434         if (priv->ucode_code.v_addr != NULL) {
5435                 pci_free_consistent(priv->pci_dev,
5436                                     priv->ucode_code.len,
5437                                     priv->ucode_code.v_addr,
5438                                     priv->ucode_code.p_addr);
5439                 priv->ucode_code.v_addr = NULL;
5440         }
5441         if (priv->ucode_data.v_addr != NULL) {
5442                 pci_free_consistent(priv->pci_dev,
5443                                     priv->ucode_data.len,
5444                                     priv->ucode_data.v_addr,
5445                                     priv->ucode_data.p_addr);
5446                 priv->ucode_data.v_addr = NULL;
5447         }
5448         if (priv->ucode_data_backup.v_addr != NULL) {
5449                 pci_free_consistent(priv->pci_dev,
5450                                     priv->ucode_data_backup.len,
5451                                     priv->ucode_data_backup.v_addr,
5452                                     priv->ucode_data_backup.p_addr);
5453                 priv->ucode_data_backup.v_addr = NULL;
5454         }
5455         if (priv->ucode_init.v_addr != NULL) {
5456                 pci_free_consistent(priv->pci_dev,
5457                                     priv->ucode_init.len,
5458                                     priv->ucode_init.v_addr,
5459                                     priv->ucode_init.p_addr);
5460                 priv->ucode_init.v_addr = NULL;
5461         }
5462         if (priv->ucode_init_data.v_addr != NULL) {
5463                 pci_free_consistent(priv->pci_dev,
5464                                     priv->ucode_init_data.len,
5465                                     priv->ucode_init_data.v_addr,
5466                                     priv->ucode_init_data.p_addr);
5467                 priv->ucode_init_data.v_addr = NULL;
5468         }
5469         if (priv->ucode_boot.v_addr != NULL) {
5470                 pci_free_consistent(priv->pci_dev,
5471                                     priv->ucode_boot.len,
5472                                     priv->ucode_boot.v_addr,
5473                                     priv->ucode_boot.p_addr);
5474                 priv->ucode_boot.v_addr = NULL;
5475         }
5476 }
5477
5478 /**
5479  * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5480  *     looking at all data.
5481  */
5482 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5483 {
5484         u32 val;
5485         u32 save_len = len;
5486         int rc = 0;
5487         u32 errcnt;
5488
5489         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5490
5491         rc = iwl_grab_restricted_access(priv);
5492         if (rc)
5493                 return rc;
5494
5495         iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5496
5497         errcnt = 0;
5498         for (; len > 0; len -= sizeof(u32), image++) {
5499                 /* read data comes through single port, auto-incr addr */
5500                 /* NOTE: Use the debugless read so we don't flood kernel log
5501                  * if IWL_DL_IO is set */
5502                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5503                 if (val != le32_to_cpu(*image)) {
5504                         IWL_ERROR("uCode INST section is invalid at "
5505                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5506                                   save_len - len, val, le32_to_cpu(*image));
5507                         rc = -EIO;
5508                         errcnt++;
5509                         if (errcnt >= 20)
5510                                 break;
5511                 }
5512         }
5513
5514         iwl_release_restricted_access(priv);
5515
5516         if (!errcnt)
5517                 IWL_DEBUG_INFO
5518                     ("ucode image in INSTRUCTION memory is good\n");
5519
5520         return rc;
5521 }
5522
5523
5524 /**
5525  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5526  *   using sample data 100 bytes apart.  If these sample points are good,
5527  *   it's a pretty good bet that everything between them is good, too.
5528  */
5529 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5530 {
5531         u32 val;
5532         int rc = 0;
5533         u32 errcnt = 0;
5534         u32 i;
5535
5536         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5537
5538         rc = iwl_grab_restricted_access(priv);
5539         if (rc)
5540                 return rc;
5541
5542         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5543                 /* read data comes through single port, auto-incr addr */
5544                 /* NOTE: Use the debugless read so we don't flood kernel log
5545                  * if IWL_DL_IO is set */
5546                 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5547                         i + RTC_INST_LOWER_BOUND);
5548                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5549                 if (val != le32_to_cpu(*image)) {
5550 #if 0 /* Enable this if you want to see details */
5551                         IWL_ERROR("uCode INST section is invalid at "
5552                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5553                                   i, val, *image);
5554 #endif
5555                         rc = -EIO;
5556                         errcnt++;
5557                         if (errcnt >= 3)
5558                                 break;
5559                 }
5560         }
5561
5562         iwl_release_restricted_access(priv);
5563
5564         return rc;
5565 }
5566
5567
5568 /**
5569  * iwl_verify_ucode - determine which instruction image is in SRAM,
5570  *    and verify its contents
5571  */
5572 static int iwl_verify_ucode(struct iwl_priv *priv)
5573 {
5574         __le32 *image;
5575         u32 len;
5576         int rc = 0;
5577
5578         /* Try bootstrap */
5579         image = (__le32 *)priv->ucode_boot.v_addr;
5580         len = priv->ucode_boot.len;
5581         rc = iwl_verify_inst_sparse(priv, image, len);
5582         if (rc == 0) {
5583                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5584                 return 0;
5585         }
5586
5587         /* Try initialize */
5588         image = (__le32 *)priv->ucode_init.v_addr;
5589         len = priv->ucode_init.len;
5590         rc = iwl_verify_inst_sparse(priv, image, len);
5591         if (rc == 0) {
5592                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5593                 return 0;
5594         }
5595
5596         /* Try runtime/protocol */
5597         image = (__le32 *)priv->ucode_code.v_addr;
5598         len = priv->ucode_code.len;
5599         rc = iwl_verify_inst_sparse(priv, image, len);
5600         if (rc == 0) {
5601                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5602                 return 0;
5603         }
5604
5605         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5606
5607         /* Show first several data entries in instruction SRAM.
5608          * Selection of bootstrap image is arbitrary. */
5609         image = (__le32 *)priv->ucode_boot.v_addr;
5610         len = priv->ucode_boot.len;
5611         rc = iwl_verify_inst_full(priv, image, len);
5612
5613         return rc;
5614 }
5615
5616
5617 /* check contents of special bootstrap uCode SRAM */
5618 static int iwl_verify_bsm(struct iwl_priv *priv)
5619 {
5620         __le32 *image = priv->ucode_boot.v_addr;
5621         u32 len = priv->ucode_boot.len;
5622         u32 reg;
5623         u32 val;
5624
5625         IWL_DEBUG_INFO("Begin verify bsm\n");
5626
5627         /* verify BSM SRAM contents */
5628         val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
5629         for (reg = BSM_SRAM_LOWER_BOUND;
5630              reg < BSM_SRAM_LOWER_BOUND + len;
5631              reg += sizeof(u32), image ++) {
5632                 val = iwl_read_restricted_reg(priv, reg);
5633                 if (val != le32_to_cpu(*image)) {
5634                         IWL_ERROR("BSM uCode verification failed at "
5635                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5636                                   BSM_SRAM_LOWER_BOUND,
5637                                   reg - BSM_SRAM_LOWER_BOUND, len,
5638                                   val, le32_to_cpu(*image));
5639                         return -EIO;
5640                 }
5641         }
5642
5643         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5644
5645         return 0;
5646 }
5647
5648 /**
5649  * iwl_load_bsm - Load bootstrap instructions
5650  *
5651  * BSM operation:
5652  *
5653  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5654  * in special SRAM that does not power down during RFKILL.  When powering back
5655  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5656  * the bootstrap program into the on-board processor, and starts it.
5657  *
5658  * The bootstrap program loads (via DMA) instructions and data for a new
5659  * program from host DRAM locations indicated by the host driver in the
5660  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5661  * automatically.
5662  *
5663  * When initializing the NIC, the host driver points the BSM to the
5664  * "initialize" uCode image.  This uCode sets up some internal data, then
5665  * notifies host via "initialize alive" that it is complete.
5666  *
5667  * The host then replaces the BSM_DRAM_* pointer values to point to the
5668  * normal runtime uCode instructions and a backup uCode data cache buffer
5669  * (filled initially with starting data values for the on-board processor),
5670  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5671  * which begins normal operation.
5672  *
5673  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5674  * the backup data cache in DRAM before SRAM is powered down.
5675  *
5676  * When powering back up, the BSM loads the bootstrap program.  This reloads
5677  * the runtime uCode instructions and the backup data cache into SRAM,
5678  * and re-launches the runtime uCode from where it left off.
5679  */
5680 static int iwl_load_bsm(struct iwl_priv *priv)
5681 {
5682         __le32 *image = priv->ucode_boot.v_addr;
5683         u32 len = priv->ucode_boot.len;
5684         dma_addr_t pinst;
5685         dma_addr_t pdata;
5686         u32 inst_len;
5687         u32 data_len;
5688         int rc;
5689         int i;
5690         u32 done;
5691         u32 reg_offset;
5692
5693         IWL_DEBUG_INFO("Begin load bsm\n");
5694
5695         /* make sure bootstrap program is no larger than BSM's SRAM size */
5696         if (len > IWL_MAX_BSM_SIZE)
5697                 return -EINVAL;
5698
5699         /* Tell bootstrap uCode where to find the "Initialize" uCode
5700          *   in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
5701          * NOTE:  iwl_initialize_alive_start() will replace these values,
5702          *        after the "initialize" uCode has run, to point to
5703          *        runtime/protocol instructions and backup data cache. */
5704         pinst = priv->ucode_init.p_addr;
5705         pdata = priv->ucode_init_data.p_addr;
5706         inst_len = priv->ucode_init.len;
5707         data_len = priv->ucode_init_data.len;
5708
5709         rc = iwl_grab_restricted_access(priv);
5710         if (rc)
5711                 return rc;
5712
5713         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
5714         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5715         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5716         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5717
5718         /* Fill BSM memory with bootstrap instructions */
5719         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5720              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5721              reg_offset += sizeof(u32), image++)
5722                 _iwl_write_restricted_reg(priv, reg_offset,
5723                                           le32_to_cpu(*image));
5724
5725         rc = iwl_verify_bsm(priv);
5726         if (rc) {
5727                 iwl_release_restricted_access(priv);
5728                 return rc;
5729         }
5730
5731         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5732         iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
5733         iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
5734                                  RTC_INST_LOWER_BOUND);
5735         iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5736
5737         /* Load bootstrap code into instruction SRAM now,
5738          *   to prepare to load "initialize" uCode */
5739         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5740                 BSM_WR_CTRL_REG_BIT_START);
5741
5742         /* Wait for load of bootstrap uCode to finish */
5743         for (i = 0; i < 100; i++) {
5744                 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
5745                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5746                         break;
5747                 udelay(10);
5748         }
5749         if (i < 100)
5750                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5751         else {
5752                 IWL_ERROR("BSM write did not complete!\n");
5753                 return -EIO;
5754         }
5755
5756         /* Enable future boot loads whenever power management unit triggers it
5757          *   (e.g. when powering back up after power-save shutdown) */
5758         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
5759                 BSM_WR_CTRL_REG_BIT_START_EN);
5760
5761         iwl_release_restricted_access(priv);
5762
5763         return 0;
5764 }
5765
5766 static void iwl_nic_start(struct iwl_priv *priv)
5767 {
5768         /* Remove all resets to allow NIC to operate */
5769         iwl_write32(priv, CSR_RESET, 0);
5770 }
5771
5772 /**
5773  * iwl_read_ucode - Read uCode images from disk file.
5774  *
5775  * Copy into buffers for card to fetch via bus-mastering
5776  */
5777 static int iwl_read_ucode(struct iwl_priv *priv)
5778 {
5779         struct iwl_ucode *ucode;
5780         int rc = 0;
5781         const struct firmware *ucode_raw;
5782         /* firmware file name contains uCode/driver compatibility version */
5783         const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
5784         u8 *src;
5785         size_t len;
5786         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5787
5788         /* Ask kernel firmware_class module to get the boot firmware off disk.
5789          * request_firmware() is synchronous, file is in memory on return. */
5790         rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5791         if (rc < 0) {
5792                 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
5793                 goto error;
5794         }
5795
5796         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5797                        name, ucode_raw->size);
5798
5799         /* Make sure that we got at least our header! */
5800         if (ucode_raw->size < sizeof(*ucode)) {
5801                 IWL_ERROR("File size way too small!\n");
5802                 rc = -EINVAL;
5803                 goto err_release;
5804         }
5805
5806         /* Data from ucode file:  header followed by uCode images */
5807         ucode = (void *)ucode_raw->data;
5808
5809         ver = le32_to_cpu(ucode->ver);
5810         inst_size = le32_to_cpu(ucode->inst_size);
5811         data_size = le32_to_cpu(ucode->data_size);
5812         init_size = le32_to_cpu(ucode->init_size);
5813         init_data_size = le32_to_cpu(ucode->init_data_size);
5814         boot_size = le32_to_cpu(ucode->boot_size);
5815
5816         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5817         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5818                        inst_size);
5819         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5820                        data_size);
5821         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5822                        init_size);
5823         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5824                        init_data_size);
5825         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5826                        boot_size);
5827
5828         /* Verify size of file vs. image size info in file's header */
5829         if (ucode_raw->size < sizeof(*ucode) +
5830                 inst_size + data_size + init_size +
5831                 init_data_size + boot_size) {
5832
5833                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5834                                (int)ucode_raw->size);
5835                 rc = -EINVAL;
5836                 goto err_release;
5837         }
5838
5839         /* Verify that uCode images will fit in card's SRAM */
5840         if (inst_size > IWL_MAX_INST_SIZE) {
5841                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
5842                                (int)inst_size);
5843                 rc = -EINVAL;
5844                 goto err_release;
5845         }
5846
5847         if (data_size > IWL_MAX_DATA_SIZE) {
5848                 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
5849                                (int)data_size);
5850                 rc = -EINVAL;
5851                 goto err_release;
5852         }
5853         if (init_size > IWL_MAX_INST_SIZE) {
5854                 IWL_DEBUG_INFO
5855                     ("uCode init instr len %d too large to fit in card\n",
5856                      (int)init_size);
5857                 rc = -EINVAL;
5858                 goto err_release;
5859         }
5860         if (init_data_size > IWL_MAX_DATA_SIZE) {
5861                 IWL_DEBUG_INFO
5862                     ("uCode init data len %d too large to fit in card\n",
5863                      (int)init_data_size);
5864                 rc = -EINVAL;
5865                 goto err_release;
5866         }
5867         if (boot_size > IWL_MAX_BSM_SIZE) {
5868                 IWL_DEBUG_INFO
5869                     ("uCode boot instr len %d too large to fit in bsm\n",
5870                      (int)boot_size);
5871                 rc = -EINVAL;
5872                 goto err_release;
5873         }
5874
5875         /* Allocate ucode buffers for card's bus-master loading ... */
5876
5877         /* Runtime instructions and 2 copies of data:
5878          * 1) unmodified from disk
5879          * 2) backup cache for save/restore during power-downs */
5880         priv->ucode_code.len = inst_size;
5881         priv->ucode_code.v_addr =
5882             pci_alloc_consistent(priv->pci_dev,
5883                                  priv->ucode_code.len,
5884                                  &(priv->ucode_code.p_addr));
5885
5886         priv->ucode_data.len = data_size;
5887         priv->ucode_data.v_addr =
5888             pci_alloc_consistent(priv->pci_dev,
5889                                  priv->ucode_data.len,
5890                                  &(priv->ucode_data.p_addr));
5891
5892         priv->ucode_data_backup.len = data_size;
5893         priv->ucode_data_backup.v_addr =
5894             pci_alloc_consistent(priv->pci_dev,
5895                                  priv->ucode_data_backup.len,
5896                                  &(priv->ucode_data_backup.p_addr));
5897
5898
5899         /* Initialization instructions and data */
5900         priv->ucode_init.len = init_size;
5901         priv->ucode_init.v_addr =
5902             pci_alloc_consistent(priv->pci_dev,
5903                                  priv->ucode_init.len,
5904                                  &(priv->ucode_init.p_addr));
5905
5906         priv->ucode_init_data.len = init_data_size;
5907         priv->ucode_init_data.v_addr =
5908             pci_alloc_consistent(priv->pci_dev,
5909                                  priv->ucode_init_data.len,
5910                                  &(priv->ucode_init_data.p_addr));
5911
5912         /* Bootstrap (instructions only, no data) */
5913         priv->ucode_boot.len = boot_size;
5914         priv->ucode_boot.v_addr =
5915             pci_alloc_consistent(priv->pci_dev,
5916                                  priv->ucode_boot.len,
5917                                  &(priv->ucode_boot.p_addr));
5918
5919         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5920             !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
5921             !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
5922                 goto err_pci_alloc;
5923
5924         /* Copy images into buffers for card's bus-master reads ... */
5925
5926         /* Runtime instructions (first block of data in file) */
5927         src = &ucode->data[0];
5928         len = priv->ucode_code.len;
5929         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
5930                        (int)len);
5931         memcpy(priv->ucode_code.v_addr, src, len);
5932         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5933                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5934
5935         /* Runtime data (2nd block)
5936          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
5937         src = &ucode->data[inst_size];
5938         len = priv->ucode_data.len;
5939         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
5940                        (int)len);
5941         memcpy(priv->ucode_data.v_addr, src, len);
5942         memcpy(priv->ucode_data_backup.v_addr, src, len);
5943
5944         /* Initialization instructions (3rd block) */
5945         if (init_size) {
5946                 src = &ucode->data[inst_size + data_size];
5947                 len = priv->ucode_init.len;
5948                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
5949                                (int)len);
5950                 memcpy(priv->ucode_init.v_addr, src, len);
5951         }
5952
5953         /* Initialization data (4th block) */
5954         if (init_data_size) {
5955                 src = &ucode->data[inst_size + data_size + init_size];
5956                 len = priv->ucode_init_data.len;
5957                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5958                                (int)len);
5959                 memcpy(priv->ucode_init_data.v_addr, src, len);
5960         }
5961
5962         /* Bootstrap instructions (5th block) */
5963         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5964         len = priv->ucode_boot.len;
5965         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5966                        (int)len);
5967         memcpy(priv->ucode_boot.v_addr, src, len);
5968
5969         /* We have our copies now, allow OS release its copies */
5970         release_firmware(ucode_raw);
5971         return 0;
5972
5973  err_pci_alloc:
5974         IWL_ERROR("failed to allocate pci memory\n");
5975         rc = -ENOMEM;
5976         iwl_dealloc_ucode_pci(priv);
5977
5978  err_release:
5979         release_firmware(ucode_raw);
5980
5981  error:
5982         return rc;
5983 }
5984
5985
5986 /**
5987  * iwl_set_ucode_ptrs - Set uCode address location
5988  *
5989  * Tell initialization uCode where to find runtime uCode.
5990  *
5991  * BSM registers initially contain pointers to initialization uCode.
5992  * We need to replace them to load runtime uCode inst and data,
5993  * and to save runtime data when powering down.
5994  */
5995 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
5996 {
5997         dma_addr_t pinst;
5998         dma_addr_t pdata;
5999         int rc = 0;
6000         unsigned long flags;
6001
6002         /* bits 31:0 for 3945 */
6003         pinst = priv->ucode_code.p_addr;
6004         pdata = priv->ucode_data_backup.p_addr;
6005
6006         spin_lock_irqsave(&priv->lock, flags);
6007         rc = iwl_grab_restricted_access(priv);
6008         if (rc) {
6009                 spin_unlock_irqrestore(&priv->lock, flags);
6010                 return rc;
6011         }
6012
6013         /* Tell bootstrap uCode where to find image to load */
6014         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6015         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6016         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6017                                  priv->ucode_data.len);
6018
6019         /* Inst bytecount must be last to set up, bit 31 signals uCode
6020          *   that all new ptr/size info is in place */
6021         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6022                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6023
6024         iwl_release_restricted_access(priv);
6025
6026         spin_unlock_irqrestore(&priv->lock, flags);
6027
6028         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6029
6030         return rc;
6031 }
6032
6033 /**
6034  * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6035  *
6036  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6037  *
6038  * The 4965 "initialize" ALIVE reply contains calibration data for:
6039  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6040  *   (3945 does not contain this data).
6041  *
6042  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6043 */
6044 static void iwl_init_alive_start(struct iwl_priv *priv)
6045 {
6046         /* Check alive response for "valid" sign from uCode */
6047         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6048                 /* We had an error bringing up the hardware, so take it
6049                  * all the way back down so we can try again */
6050                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6051                 goto restart;
6052         }
6053
6054         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6055          * This is a paranoid check, because we would not have gotten the
6056          * "initialize" alive if code weren't properly loaded.  */
6057         if (iwl_verify_ucode(priv)) {
6058                 /* Runtime instruction load was bad;
6059                  * take it all the way back down so we can try again */
6060                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6061                 goto restart;
6062         }
6063
6064         /* Send pointers to protocol/runtime uCode image ... init code will
6065          * load and launch runtime uCode, which will send us another "Alive"
6066          * notification. */
6067         IWL_DEBUG_INFO("Initialization Alive received.\n");
6068         if (iwl_set_ucode_ptrs(priv)) {
6069                 /* Runtime instruction load won't happen;
6070                  * take it all the way back down so we can try again */
6071                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6072                 goto restart;
6073         }
6074         return;
6075
6076  restart:
6077         queue_work(priv->workqueue, &priv->restart);
6078 }
6079
6080
6081 /**
6082  * iwl_alive_start - called after REPLY_ALIVE notification received
6083  *                   from protocol/runtime uCode (initialization uCode's
6084  *                   Alive gets handled by iwl_init_alive_start()).
6085  */
6086 static void iwl_alive_start(struct iwl_priv *priv)
6087 {
6088         int rc = 0;
6089         int thermal_spin = 0;
6090         u32 rfkill;
6091
6092         IWL_DEBUG_INFO("Runtime Alive received.\n");
6093
6094         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6095                 /* We had an error bringing up the hardware, so take it
6096                  * all the way back down so we can try again */
6097                 IWL_DEBUG_INFO("Alive failed.\n");
6098                 goto restart;
6099         }
6100
6101         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6102          * This is a paranoid check, because we would not have gotten the
6103          * "runtime" alive if code weren't properly loaded.  */
6104         if (iwl_verify_ucode(priv)) {
6105                 /* Runtime instruction load was bad;
6106                  * take it all the way back down so we can try again */
6107                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6108                 goto restart;
6109         }
6110
6111         iwl_clear_stations_table(priv);
6112
6113         rc = iwl_grab_restricted_access(priv);
6114         if (rc) {
6115                 IWL_WARNING("Can not read rfkill status from adapter\n");
6116                 return;
6117         }
6118
6119         rfkill = iwl_read_restricted_reg(priv, APMG_RFKILL_REG);
6120         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
6121         iwl_release_restricted_access(priv);
6122
6123         if (rfkill & 0x1) {
6124                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6125                 /* if rfkill is not on, then wait for thermal
6126                  * sensor in adapter to kick in */
6127                 while (iwl_hw_get_temperature(priv) == 0) {
6128                         thermal_spin++;
6129                         udelay(10);
6130                 }
6131
6132                 if (thermal_spin)
6133                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
6134                                        thermal_spin * 10);
6135         } else
6136                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6137
6138         /* After the ALIVE response, we can process host commands */
6139         set_bit(STATUS_ALIVE, &priv->status);
6140
6141         /* Clear out the uCode error bit if it is set */
6142         clear_bit(STATUS_FW_ERROR, &priv->status);
6143
6144         rc = iwl_init_channel_map(priv);
6145         if (rc) {
6146                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6147                 return;
6148         }
6149
6150         iwl_init_geos(priv);
6151
6152         if (iwl_is_rfkill(priv))
6153                 return;
6154
6155         if (!priv->mac80211_registered) {
6156                 /* Unlock so any user space entry points can call back into
6157                  * the driver without a deadlock... */
6158                 mutex_unlock(&priv->mutex);
6159                 iwl_rate_control_register(priv->hw);
6160                 rc = ieee80211_register_hw(priv->hw);
6161                 priv->hw->conf.beacon_int = 100;
6162                 mutex_lock(&priv->mutex);
6163
6164                 if (rc) {
6165                         IWL_ERROR("Failed to register network "
6166                                   "device (error %d)\n", rc);
6167                         return;
6168                 }
6169
6170                 priv->mac80211_registered = 1;
6171
6172                 iwl_reset_channel_flag(priv);
6173         } else
6174                 ieee80211_start_queues(priv->hw);
6175
6176         priv->active_rate = priv->rates_mask;
6177         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6178
6179         iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6180
6181         if (iwl_is_associated(priv)) {
6182                 struct iwl_rxon_cmd *active_rxon =
6183                                 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6184
6185                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6186                        sizeof(priv->staging_rxon));
6187                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6188         } else {
6189                 /* Initialize our rx_config data */
6190                 iwl_connection_init_rx_config(priv);
6191                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6192         }
6193
6194         /* Configure BT coexistence */
6195         iwl_send_bt_config(priv);
6196
6197         /* Configure the adapter for unassociated operation */
6198         iwl_commit_rxon(priv);
6199
6200         /* At this point, the NIC is initialized and operational */
6201         priv->notif_missed_beacons = 0;
6202         set_bit(STATUS_READY, &priv->status);
6203
6204         iwl3945_reg_txpower_periodic(priv);
6205
6206         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6207
6208         if (priv->error_recovering)
6209                 iwl_error_recovery(priv);
6210
6211         return;
6212
6213  restart:
6214         queue_work(priv->workqueue, &priv->restart);
6215 }
6216
6217 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6218
6219 static void __iwl_down(struct iwl_priv *priv)
6220 {
6221         unsigned long flags;
6222         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6223         struct ieee80211_conf *conf = NULL;
6224
6225         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6226
6227         conf = ieee80211_get_hw_conf(priv->hw);
6228
6229         if (!exit_pending)
6230                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6231
6232         iwl_clear_stations_table(priv);
6233
6234         /* Unblock any waiting calls */
6235         wake_up_interruptible_all(&priv->wait_command_queue);
6236
6237         iwl_cancel_deferred_work(priv);
6238
6239         /* Wipe out the EXIT_PENDING status bit if we are not actually
6240          * exiting the module */
6241         if (!exit_pending)
6242                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6243
6244         /* stop and reset the on-board processor */
6245         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6246
6247         /* tell the device to stop sending interrupts */
6248         iwl_disable_interrupts(priv);
6249
6250         if (priv->mac80211_registered)
6251                 ieee80211_stop_queues(priv->hw);
6252
6253         /* If we have not previously called iwl_init() then
6254          * clear all bits but the RF Kill and SUSPEND bits and return */
6255         if (!iwl_is_init(priv)) {
6256                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6257                                         STATUS_RF_KILL_HW |
6258                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6259                                         STATUS_RF_KILL_SW |
6260                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6261                                         STATUS_IN_SUSPEND;
6262                 goto exit;
6263         }
6264
6265         /* ...otherwise clear out all the status bits but the RF Kill and
6266          * SUSPEND bits and continue taking the NIC down. */
6267         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6268                                 STATUS_RF_KILL_HW |
6269                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6270                                 STATUS_RF_KILL_SW |
6271                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6272                                 STATUS_IN_SUSPEND |
6273                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6274                                 STATUS_FW_ERROR;
6275
6276         spin_lock_irqsave(&priv->lock, flags);
6277         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6278         spin_unlock_irqrestore(&priv->lock, flags);
6279
6280         iwl_hw_txq_ctx_stop(priv);
6281         iwl_hw_rxq_stop(priv);
6282
6283         spin_lock_irqsave(&priv->lock, flags);
6284         if (!iwl_grab_restricted_access(priv)) {
6285                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6286                                          APMG_CLK_VAL_DMA_CLK_RQT);
6287                 iwl_release_restricted_access(priv);
6288         }
6289         spin_unlock_irqrestore(&priv->lock, flags);
6290
6291         udelay(5);
6292
6293         iwl_hw_nic_stop_master(priv);
6294         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6295         iwl_hw_nic_reset(priv);
6296
6297  exit:
6298         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6299
6300         if (priv->ibss_beacon)
6301                 dev_kfree_skb(priv->ibss_beacon);
6302         priv->ibss_beacon = NULL;
6303
6304         /* clear out any free frames */
6305         iwl_clear_free_frames(priv);
6306 }
6307
6308 static void iwl_down(struct iwl_priv *priv)
6309 {
6310         mutex_lock(&priv->mutex);
6311         __iwl_down(priv);
6312         mutex_unlock(&priv->mutex);
6313 }
6314
6315 #define MAX_HW_RESTARTS 5
6316
6317 static int __iwl_up(struct iwl_priv *priv)
6318 {
6319         DECLARE_MAC_BUF(mac);
6320         int rc, i;
6321
6322         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6323                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6324                 return -EIO;
6325         }
6326
6327         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6328                 IWL_WARNING("Radio disabled by SW RF kill (module "
6329                             "parameter)\n");
6330                 return 0;
6331         }
6332
6333         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6334
6335         rc = iwl_hw_nic_init(priv);
6336         if (rc) {
6337                 IWL_ERROR("Unable to int nic\n");
6338                 return rc;
6339         }
6340
6341         /* make sure rfkill handshake bits are cleared */
6342         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6343         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6344                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6345
6346         /* clear (again), then enable host interrupts */
6347         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6348         iwl_enable_interrupts(priv);
6349
6350         /* really make sure rfkill handshake bits are cleared */
6351         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6352         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6353
6354         /* Copy original ucode data image from disk into backup cache.
6355          * This will be used to initialize the on-board processor's
6356          * data SRAM for a clean start when the runtime program first loads. */
6357         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6358                         priv->ucode_data.len);
6359
6360         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6361
6362                 iwl_clear_stations_table(priv);
6363
6364                 /* load bootstrap state machine,
6365                  * load bootstrap program into processor's memory,
6366                  * prepare to load the "initialize" uCode */
6367                 rc = iwl_load_bsm(priv);
6368
6369                 if (rc) {
6370                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6371                         continue;
6372                 }
6373
6374                 /* start card; "initialize" will load runtime ucode */
6375                 iwl_nic_start(priv);
6376
6377                 /* MAC Address location in EEPROM same for 3945/4965 */
6378                 get_eeprom_mac(priv, priv->mac_addr);
6379                 IWL_DEBUG_INFO("MAC address: %s\n",
6380                                print_mac(mac, priv->mac_addr));
6381
6382                 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6383
6384                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6385
6386                 return 0;
6387         }
6388
6389         set_bit(STATUS_EXIT_PENDING, &priv->status);
6390         __iwl_down(priv);
6391
6392         /* tried to restart and config the device for as long as our
6393          * patience could withstand */
6394         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6395         return -EIO;
6396 }
6397
6398
6399 /*****************************************************************************
6400  *
6401  * Workqueue callbacks
6402  *
6403  *****************************************************************************/
6404
6405 static void iwl_bg_init_alive_start(struct work_struct *data)
6406 {
6407         struct iwl_priv *priv =
6408             container_of(data, struct iwl_priv, init_alive_start.work);
6409
6410         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6411                 return;
6412
6413         mutex_lock(&priv->mutex);
6414         iwl_init_alive_start(priv);
6415         mutex_unlock(&priv->mutex);
6416 }
6417
6418 static void iwl_bg_alive_start(struct work_struct *data)
6419 {
6420         struct iwl_priv *priv =
6421             container_of(data, struct iwl_priv, alive_start.work);
6422
6423         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6424                 return;
6425
6426         mutex_lock(&priv->mutex);
6427         iwl_alive_start(priv);
6428         mutex_unlock(&priv->mutex);
6429 }
6430
6431 static void iwl_bg_rf_kill(struct work_struct *work)
6432 {
6433         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6434
6435         wake_up_interruptible(&priv->wait_command_queue);
6436
6437         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6438                 return;
6439
6440         mutex_lock(&priv->mutex);
6441
6442         if (!iwl_is_rfkill(priv)) {
6443                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6444                           "HW and/or SW RF Kill no longer active, restarting "
6445                           "device\n");
6446                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6447                         queue_work(priv->workqueue, &priv->restart);
6448         } else {
6449
6450                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6451                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6452                                           "disabled by SW switch\n");
6453                 else
6454                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6455                                     "Kill switch must be turned off for "
6456                                     "wireless networking to work.\n");
6457         }
6458         mutex_unlock(&priv->mutex);
6459 }
6460
6461 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6462
6463 static void iwl_bg_scan_check(struct work_struct *data)
6464 {
6465         struct iwl_priv *priv =
6466             container_of(data, struct iwl_priv, scan_check.work);
6467
6468         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6469                 return;
6470
6471         mutex_lock(&priv->mutex);
6472         if (test_bit(STATUS_SCANNING, &priv->status) ||
6473             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6474                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6475                           "Scan completion watchdog resetting adapter (%dms)\n",
6476                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6477                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6478                         queue_work(priv->workqueue, &priv->restart);
6479         }
6480         mutex_unlock(&priv->mutex);
6481 }
6482
6483 static void iwl_bg_request_scan(struct work_struct *data)
6484 {
6485         struct iwl_priv *priv =
6486             container_of(data, struct iwl_priv, request_scan);
6487         struct iwl_host_cmd cmd = {
6488                 .id = REPLY_SCAN_CMD,
6489                 .len = sizeof(struct iwl_scan_cmd),
6490                 .meta.flags = CMD_SIZE_HUGE,
6491         };
6492         int rc = 0;
6493         struct iwl_scan_cmd *scan;
6494         struct ieee80211_conf *conf = NULL;
6495         u8 direct_mask;
6496         int phymode;
6497
6498         conf = ieee80211_get_hw_conf(priv->hw);
6499
6500         mutex_lock(&priv->mutex);
6501
6502         if (!iwl_is_ready(priv)) {
6503                 IWL_WARNING("request scan called when driver not ready.\n");
6504                 goto done;
6505         }
6506
6507         /* Make sure the scan wasn't cancelled before this queued work
6508          * was given the chance to run... */
6509         if (!test_bit(STATUS_SCANNING, &priv->status))
6510                 goto done;
6511
6512         /* This should never be called or scheduled if there is currently
6513          * a scan active in the hardware. */
6514         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6515                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6516                                "Ignoring second request.\n");
6517                 rc = -EIO;
6518                 goto done;
6519         }
6520
6521         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6522                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6523                 goto done;
6524         }
6525
6526         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6527                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6528                 goto done;
6529         }
6530
6531         if (iwl_is_rfkill(priv)) {
6532                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6533                 goto done;
6534         }
6535
6536         if (!test_bit(STATUS_READY, &priv->status)) {
6537                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6538                 goto done;
6539         }
6540
6541         if (!priv->scan_bands) {
6542                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6543                 goto done;
6544         }
6545
6546         if (!priv->scan) {
6547                 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6548                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6549                 if (!priv->scan) {
6550                         rc = -ENOMEM;
6551                         goto done;
6552                 }
6553         }
6554         scan = priv->scan;
6555         memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6556
6557         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6558         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6559
6560         if (iwl_is_associated(priv)) {
6561                 u16 interval = 0;
6562                 u32 extra;
6563                 u32 suspend_time = 100;
6564                 u32 scan_suspend_time = 100;
6565                 unsigned long flags;
6566
6567                 IWL_DEBUG_INFO("Scanning while associated...\n");
6568
6569                 spin_lock_irqsave(&priv->lock, flags);
6570                 interval = priv->beacon_int;
6571                 spin_unlock_irqrestore(&priv->lock, flags);
6572
6573                 scan->suspend_time = 0;
6574                 scan->max_out_time = cpu_to_le32(600 * 1024);
6575                 if (!interval)
6576                         interval = suspend_time;
6577                 /*
6578                  * suspend time format:
6579                  *  0-19: beacon interval in usec (time before exec.)
6580                  * 20-23: 0
6581                  * 24-31: number of beacons (suspend between channels)
6582                  */
6583
6584                 extra = (suspend_time / interval) << 24;
6585                 scan_suspend_time = 0xFF0FFFFF &
6586                     (extra | ((suspend_time % interval) * 1024));
6587
6588                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6589                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6590                                scan_suspend_time, interval);
6591         }
6592
6593         /* We should add the ability for user to lock to PASSIVE ONLY */
6594         if (priv->one_direct_scan) {
6595                 IWL_DEBUG_SCAN
6596                     ("Kicking off one direct scan for '%s'\n",
6597                      iwl_escape_essid(priv->direct_ssid,
6598                                       priv->direct_ssid_len));
6599                 scan->direct_scan[0].id = WLAN_EID_SSID;
6600                 scan->direct_scan[0].len = priv->direct_ssid_len;
6601                 memcpy(scan->direct_scan[0].ssid,
6602                        priv->direct_ssid, priv->direct_ssid_len);
6603                 direct_mask = 1;
6604         } else if (!iwl_is_associated(priv)) {
6605                 scan->direct_scan[0].id = WLAN_EID_SSID;
6606                 scan->direct_scan[0].len = priv->essid_len;
6607                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6608                 direct_mask = 1;
6609         } else
6610                 direct_mask = 0;
6611
6612         /* We don't build a direct scan probe request; the uCode will do
6613          * that based on the direct_mask added to each channel entry */
6614         scan->tx_cmd.len = cpu_to_le16(
6615                 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6616                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6617         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6618         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6619         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6620
6621         /* flags + rate selection */
6622
6623         switch (priv->scan_bands) {
6624         case 2:
6625                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6626                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6627                 scan->good_CRC_th = 0;
6628                 phymode = MODE_IEEE80211G;
6629                 break;
6630
6631         case 1:
6632                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6633                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6634                 phymode = MODE_IEEE80211A;
6635                 break;
6636
6637         default:
6638                 IWL_WARNING("Invalid scan band count\n");
6639                 goto done;
6640         }
6641
6642         /* select Rx antennas */
6643         scan->flags |= iwl3945_get_antenna_flags(priv);
6644
6645         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6646                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6647
6648         if (direct_mask)
6649                 IWL_DEBUG_SCAN
6650                     ("Initiating direct scan for %s.\n",
6651                      iwl_escape_essid(priv->essid, priv->essid_len));
6652         else
6653                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6654
6655         scan->channel_count =
6656                 iwl_get_channels_for_scan(
6657                         priv, phymode, 1, /* active */
6658                         direct_mask,
6659                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6660
6661         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6662             scan->channel_count * sizeof(struct iwl_scan_channel);
6663         cmd.data = scan;
6664         scan->len = cpu_to_le16(cmd.len);
6665
6666         set_bit(STATUS_SCAN_HW, &priv->status);
6667         rc = iwl_send_cmd_sync(priv, &cmd);
6668         if (rc)
6669                 goto done;
6670
6671         queue_delayed_work(priv->workqueue, &priv->scan_check,
6672                            IWL_SCAN_CHECK_WATCHDOG);
6673
6674         mutex_unlock(&priv->mutex);
6675         return;
6676
6677  done:
6678         /* inform mac80211 sacn aborted */
6679         queue_work(priv->workqueue, &priv->scan_completed);
6680         mutex_unlock(&priv->mutex);
6681 }
6682
6683 static void iwl_bg_up(struct work_struct *data)
6684 {
6685         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6686
6687         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6688                 return;
6689
6690         mutex_lock(&priv->mutex);
6691         __iwl_up(priv);
6692         mutex_unlock(&priv->mutex);
6693 }
6694
6695 static void iwl_bg_restart(struct work_struct *data)
6696 {
6697         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6698
6699         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6700                 return;
6701
6702         iwl_down(priv);
6703         queue_work(priv->workqueue, &priv->up);
6704 }
6705
6706 static void iwl_bg_rx_replenish(struct work_struct *data)
6707 {
6708         struct iwl_priv *priv =
6709             container_of(data, struct iwl_priv, rx_replenish);
6710
6711         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6712                 return;
6713
6714         mutex_lock(&priv->mutex);
6715         iwl_rx_replenish(priv);
6716         mutex_unlock(&priv->mutex);
6717 }
6718
6719 static void iwl_bg_post_associate(struct work_struct *data)
6720 {
6721         struct iwl_priv *priv = container_of(data, struct iwl_priv,
6722                                              post_associate.work);
6723
6724         int rc = 0;
6725         struct ieee80211_conf *conf = NULL;
6726         DECLARE_MAC_BUF(mac);
6727
6728         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6729                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6730                 return;
6731         }
6732
6733
6734         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6735                         priv->assoc_id,
6736                         print_mac(mac, priv->active_rxon.bssid_addr));
6737
6738         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6739                 return;
6740
6741         mutex_lock(&priv->mutex);
6742
6743         conf = ieee80211_get_hw_conf(priv->hw);
6744
6745         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6746         iwl_commit_rxon(priv);
6747
6748         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6749         iwl_setup_rxon_timing(priv);
6750         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6751                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6752         if (rc)
6753                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6754                             "Attempting to continue.\n");
6755
6756         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6757
6758         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6759
6760         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6761                         priv->assoc_id, priv->beacon_int);
6762
6763         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6764                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6765         else
6766                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6767
6768         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6769                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6770                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6771                 else
6772                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6773
6774                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6775                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6776
6777         }
6778
6779         iwl_commit_rxon(priv);
6780
6781         switch (priv->iw_mode) {
6782         case IEEE80211_IF_TYPE_STA:
6783                 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
6784                 break;
6785
6786         case IEEE80211_IF_TYPE_IBSS:
6787
6788                 /* clear out the station table */
6789                 iwl_clear_stations_table(priv);
6790
6791                 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
6792                 iwl_add_station(priv, priv->bssid, 0, 0);
6793                 iwl3945_sync_sta(priv, IWL_STA_ID,
6794                                  (priv->phymode == MODE_IEEE80211A)?
6795                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6796                                  CMD_ASYNC);
6797                 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
6798                 iwl_send_beacon_cmd(priv);
6799
6800                 break;
6801
6802         default:
6803                  IWL_ERROR("%s Should not be called in %d mode\n",
6804                                 __FUNCTION__, priv->iw_mode);
6805                 break;
6806         }
6807
6808         iwl_sequence_reset(priv);
6809
6810 #ifdef CONFIG_IWLWIFI_QOS
6811         iwl_activate_qos(priv, 0);
6812 #endif /* CONFIG_IWLWIFI_QOS */
6813         mutex_unlock(&priv->mutex);
6814 }
6815
6816 static void iwl_bg_abort_scan(struct work_struct *work)
6817 {
6818         struct iwl_priv *priv = container_of(work, struct iwl_priv,
6819                                              abort_scan);
6820
6821         if (!iwl_is_ready(priv))
6822                 return;
6823
6824         mutex_lock(&priv->mutex);
6825
6826         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6827         iwl_send_scan_abort(priv);
6828
6829         mutex_unlock(&priv->mutex);
6830 }
6831
6832 static void iwl_bg_scan_completed(struct work_struct *work)
6833 {
6834         struct iwl_priv *priv =
6835             container_of(work, struct iwl_priv, scan_completed);
6836
6837         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6838
6839         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6840                 return;
6841
6842         ieee80211_scan_completed(priv->hw);
6843
6844         /* Since setting the TXPOWER may have been deferred while
6845          * performing the scan, fire one off */
6846         mutex_lock(&priv->mutex);
6847         iwl_hw_reg_send_txpower(priv);
6848         mutex_unlock(&priv->mutex);
6849 }
6850
6851 /*****************************************************************************
6852  *
6853  * mac80211 entry point functions
6854  *
6855  *****************************************************************************/
6856
6857 static int iwl_mac_start(struct ieee80211_hw *hw)
6858 {
6859         struct iwl_priv *priv = hw->priv;
6860
6861         IWL_DEBUG_MAC80211("enter\n");
6862
6863         /* we should be verifying the device is ready to be opened */
6864         mutex_lock(&priv->mutex);
6865
6866         priv->is_open = 1;
6867
6868         if (!iwl_is_rfkill(priv))
6869                 ieee80211_start_queues(priv->hw);
6870
6871         mutex_unlock(&priv->mutex);
6872         IWL_DEBUG_MAC80211("leave\n");
6873         return 0;
6874 }
6875
6876 static void iwl_mac_stop(struct ieee80211_hw *hw)
6877 {
6878         struct iwl_priv *priv = hw->priv;
6879
6880         IWL_DEBUG_MAC80211("enter\n");
6881         priv->is_open = 0;
6882         /*netif_stop_queue(dev); */
6883         flush_workqueue(priv->workqueue);
6884         IWL_DEBUG_MAC80211("leave\n");
6885 }
6886
6887 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6888                       struct ieee80211_tx_control *ctl)
6889 {
6890         struct iwl_priv *priv = hw->priv;
6891
6892         IWL_DEBUG_MAC80211("enter\n");
6893
6894         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6895                 IWL_DEBUG_MAC80211("leave - monitor\n");
6896                 return -1;
6897         }
6898
6899         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6900                      ctl->tx_rate);
6901
6902         if (iwl_tx_skb(priv, skb, ctl))
6903                 dev_kfree_skb_any(skb);
6904
6905         IWL_DEBUG_MAC80211("leave\n");
6906         return 0;
6907 }
6908
6909 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
6910                                  struct ieee80211_if_init_conf *conf)
6911 {
6912         struct iwl_priv *priv = hw->priv;
6913         unsigned long flags;
6914         DECLARE_MAC_BUF(mac);
6915
6916         IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
6917         if (conf->mac_addr)
6918                 IWL_DEBUG_MAC80211("enter: MAC %s\n",
6919                                    print_mac(mac, conf->mac_addr));
6920
6921         if (priv->interface_id) {
6922                 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
6923                 return 0;
6924         }
6925
6926         spin_lock_irqsave(&priv->lock, flags);
6927         priv->interface_id = conf->if_id;
6928
6929         spin_unlock_irqrestore(&priv->lock, flags);
6930
6931         mutex_lock(&priv->mutex);
6932         iwl_set_mode(priv, conf->type);
6933
6934         IWL_DEBUG_MAC80211("leave\n");
6935         mutex_unlock(&priv->mutex);
6936
6937         return 0;
6938 }
6939
6940 /**
6941  * iwl_mac_config - mac80211 config callback
6942  *
6943  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6944  * be set inappropriately and the driver currently sets the hardware up to
6945  * use it whenever needed.
6946  */
6947 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6948 {
6949         struct iwl_priv *priv = hw->priv;
6950         const struct iwl_channel_info *ch_info;
6951         unsigned long flags;
6952
6953         mutex_lock(&priv->mutex);
6954         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
6955
6956         if (!iwl_is_ready(priv)) {
6957                 IWL_DEBUG_MAC80211("leave - not ready\n");
6958                 mutex_unlock(&priv->mutex);
6959                 return -EIO;
6960         }
6961
6962         /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
6963          * what is exposed through include/ declrations */
6964         if (unlikely(!iwl_param_disable_hw_scan &&
6965                      test_bit(STATUS_SCANNING, &priv->status))) {
6966                 IWL_DEBUG_MAC80211("leave - scanning\n");
6967                 mutex_unlock(&priv->mutex);
6968                 return 0;
6969         }
6970
6971         spin_lock_irqsave(&priv->lock, flags);
6972
6973         ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
6974         if (!is_channel_valid(ch_info)) {
6975                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
6976                                conf->channel, conf->phymode);
6977                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6978                 spin_unlock_irqrestore(&priv->lock, flags);
6979                 mutex_unlock(&priv->mutex);
6980                 return -EINVAL;
6981         }
6982
6983         iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
6984
6985         iwl_set_flags_for_phymode(priv, conf->phymode);
6986
6987         /* The list of supported rates and rate mask can be different
6988          * for each phymode; since the phymode may have changed, reset
6989          * the rate mask to what mac80211 lists */
6990         iwl_set_rate(priv);
6991
6992         spin_unlock_irqrestore(&priv->lock, flags);
6993
6994 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6995         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6996                 iwl_hw_channel_switch(priv, conf->channel);
6997                 mutex_unlock(&priv->mutex);
6998                 return 0;
6999         }
7000 #endif
7001
7002         iwl_radio_kill_sw(priv, !conf->radio_enabled);
7003
7004         if (!conf->radio_enabled) {
7005                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7006                 mutex_unlock(&priv->mutex);
7007                 return 0;
7008         }
7009
7010         if (iwl_is_rfkill(priv)) {
7011                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7012                 mutex_unlock(&priv->mutex);
7013                 return -EIO;
7014         }
7015
7016         iwl_set_rate(priv);
7017
7018         if (memcmp(&priv->active_rxon,
7019                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7020                 iwl_commit_rxon(priv);
7021         else
7022                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7023
7024         IWL_DEBUG_MAC80211("leave\n");
7025
7026         mutex_unlock(&priv->mutex);
7027
7028         return 0;
7029 }
7030
7031 static void iwl_config_ap(struct iwl_priv *priv)
7032 {
7033         int rc = 0;
7034
7035         if (priv->status & STATUS_EXIT_PENDING)
7036                 return;
7037
7038         /* The following should be done only at AP bring up */
7039         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7040
7041                 /* RXON - unassoc (to set timing command) */
7042                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7043                 iwl_commit_rxon(priv);
7044
7045                 /* RXON Timing */
7046                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7047                 iwl_setup_rxon_timing(priv);
7048                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7049                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7050                 if (rc)
7051                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7052                                         "Attempting to continue.\n");
7053
7054                 /* FIXME: what should be the assoc_id for AP? */
7055                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7056                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7057                         priv->staging_rxon.flags |=
7058                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7059                 else
7060                         priv->staging_rxon.flags &=
7061                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7062
7063                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7064                         if (priv->assoc_capability &
7065                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7066                                 priv->staging_rxon.flags |=
7067                                         RXON_FLG_SHORT_SLOT_MSK;
7068                         else
7069                                 priv->staging_rxon.flags &=
7070                                         ~RXON_FLG_SHORT_SLOT_MSK;
7071
7072                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7073                                 priv->staging_rxon.flags &=
7074                                         ~RXON_FLG_SHORT_SLOT_MSK;
7075                 }
7076                 /* restore RXON assoc */
7077                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7078                 iwl_commit_rxon(priv);
7079                 iwl_add_station(priv, BROADCAST_ADDR, 0, 0);
7080         }
7081         iwl_send_beacon_cmd(priv);
7082
7083         /* FIXME - we need to add code here to detect a totally new
7084          * configuration, reset the AP, unassoc, rxon timing, assoc,
7085          * clear sta table, add BCAST sta... */
7086 }
7087
7088 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7089                                     struct ieee80211_if_conf *conf)
7090 {
7091         struct iwl_priv *priv = hw->priv;
7092         DECLARE_MAC_BUF(mac);
7093         unsigned long flags;
7094         int rc;
7095
7096         if (conf == NULL)
7097                 return -EIO;
7098
7099         /* XXX: this MUST use conf->mac_addr */
7100
7101         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7102             (!conf->beacon || !conf->ssid_len)) {
7103                 IWL_DEBUG_MAC80211
7104                     ("Leaving in AP mode because HostAPD is not ready.\n");
7105                 return 0;
7106         }
7107
7108         mutex_lock(&priv->mutex);
7109
7110         IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7111         if (conf->bssid)
7112                 IWL_DEBUG_MAC80211("bssid: %s\n",
7113                                    print_mac(mac, conf->bssid));
7114
7115 /*
7116  * very dubious code was here; the probe filtering flag is never set:
7117  *
7118         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7119             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7120  */
7121         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7122                 IWL_DEBUG_MAC80211("leave - scanning\n");
7123                 mutex_unlock(&priv->mutex);
7124                 return 0;
7125         }
7126
7127         if (priv->interface_id != if_id) {
7128                 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7129                 mutex_unlock(&priv->mutex);
7130                 return 0;
7131         }
7132
7133         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7134                 if (!conf->bssid) {
7135                         conf->bssid = priv->mac_addr;
7136                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7137                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7138                                            print_mac(mac, conf->bssid));
7139                 }
7140                 if (priv->ibss_beacon)
7141                         dev_kfree_skb(priv->ibss_beacon);
7142
7143                 priv->ibss_beacon = conf->beacon;
7144         }
7145
7146         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7147             !is_multicast_ether_addr(conf->bssid)) {
7148                 /* If there is currently a HW scan going on in the background
7149                  * then we need to cancel it else the RXON below will fail. */
7150                 if (iwl_scan_cancel_timeout(priv, 100)) {
7151                         IWL_WARNING("Aborted scan still in progress "
7152                                     "after 100ms\n");
7153                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7154                         mutex_unlock(&priv->mutex);
7155                         return -EAGAIN;
7156                 }
7157                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7158
7159                 /* TODO: Audit driver for usage of these members and see
7160                  * if mac80211 deprecates them (priv->bssid looks like it
7161                  * shouldn't be there, but I haven't scanned the IBSS code
7162                  * to verify) - jpk */
7163                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7164
7165                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7166                         iwl_config_ap(priv);
7167                 else {
7168                         priv->staging_rxon.filter_flags |=
7169                                                 RXON_FILTER_ASSOC_MSK;
7170                         rc = iwl_commit_rxon(priv);
7171                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7172                                 iwl_add_station(priv,
7173                                         priv->active_rxon.bssid_addr, 1, 0);
7174                 }
7175
7176         } else {
7177                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7178                 iwl_commit_rxon(priv);
7179         }
7180
7181         spin_lock_irqsave(&priv->lock, flags);
7182         if (!conf->ssid_len)
7183                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7184         else
7185                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7186
7187         priv->essid_len = conf->ssid_len;
7188         spin_unlock_irqrestore(&priv->lock, flags);
7189
7190         IWL_DEBUG_MAC80211("leave\n");
7191         mutex_unlock(&priv->mutex);
7192
7193         return 0;
7194 }
7195
7196 static void iwl_configure_filter(struct ieee80211_hw *hw,
7197                                  unsigned int changed_flags,
7198                                  unsigned int *total_flags,
7199                                  int mc_count, struct dev_addr_list *mc_list)
7200 {
7201         /*
7202          * XXX: dummy
7203          * see also iwl_connection_init_rx_config
7204          */
7205         *total_flags = 0;
7206 }
7207
7208 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7209                                      struct ieee80211_if_init_conf *conf)
7210 {
7211         struct iwl_priv *priv = hw->priv;
7212
7213         IWL_DEBUG_MAC80211("enter\n");
7214
7215         mutex_lock(&priv->mutex);
7216         if (priv->interface_id == conf->if_id) {
7217                 priv->interface_id = 0;
7218                 memset(priv->bssid, 0, ETH_ALEN);
7219                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7220                 priv->essid_len = 0;
7221         }
7222         mutex_unlock(&priv->mutex);
7223
7224         IWL_DEBUG_MAC80211("leave\n");
7225
7226 }
7227
7228 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7229 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7230 {
7231         int rc = 0;
7232         unsigned long flags;
7233         struct iwl_priv *priv = hw->priv;
7234
7235         IWL_DEBUG_MAC80211("enter\n");
7236
7237         spin_lock_irqsave(&priv->lock, flags);
7238
7239         if (!iwl_is_ready_rf(priv)) {
7240                 rc = -EIO;
7241                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7242                 goto out_unlock;
7243         }
7244
7245         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7246                 rc = -EIO;
7247                 IWL_ERROR("ERROR: APs don't scan\n");
7248                 goto out_unlock;
7249         }
7250
7251         /* if we just finished scan ask for delay */
7252         if (priv->last_scan_jiffies &&
7253             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7254                        jiffies)) {
7255                 rc = -EAGAIN;
7256                 goto out_unlock;
7257         }
7258         if (len) {
7259                 IWL_DEBUG_SCAN("direct scan for  "
7260                                "%s [%d]\n ",
7261                                iwl_escape_essid(ssid, len), (int)len);
7262
7263                 priv->one_direct_scan = 1;
7264                 priv->direct_ssid_len = (u8)
7265                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7266                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7267         }
7268
7269         rc = iwl_scan_initiate(priv);
7270
7271         IWL_DEBUG_MAC80211("leave\n");
7272
7273 out_unlock:
7274         spin_unlock_irqrestore(&priv->lock, flags);
7275
7276         return rc;
7277 }
7278
7279 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7280                            const u8 *local_addr, const u8 *addr,
7281                            struct ieee80211_key_conf *key)
7282 {
7283         struct iwl_priv *priv = hw->priv;
7284         int rc = 0;
7285         u8 sta_id;
7286
7287         IWL_DEBUG_MAC80211("enter\n");
7288
7289         if (!iwl_param_hwcrypto) {
7290                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7291                 return -EOPNOTSUPP;
7292         }
7293
7294         if (is_zero_ether_addr(addr))
7295                 /* only support pairwise keys */
7296                 return -EOPNOTSUPP;
7297
7298         sta_id = iwl_hw_find_station(priv, addr);
7299         if (sta_id == IWL_INVALID_STATION) {
7300                 DECLARE_MAC_BUF(mac);
7301
7302                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7303                                    print_mac(mac, addr));
7304                 return -EINVAL;
7305         }
7306
7307         mutex_lock(&priv->mutex);
7308
7309         switch (cmd) {
7310         case  SET_KEY:
7311                 rc = iwl_update_sta_key_info(priv, key, sta_id);
7312                 if (!rc) {
7313                         iwl_set_rxon_hwcrypto(priv, 1);
7314                         iwl_commit_rxon(priv);
7315                         key->hw_key_idx = sta_id;
7316                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7317                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7318                 }
7319                 break;
7320         case DISABLE_KEY:
7321                 rc = iwl_clear_sta_key_info(priv, sta_id);
7322                 if (!rc) {
7323                         iwl_set_rxon_hwcrypto(priv, 0);
7324                         iwl_commit_rxon(priv);
7325                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7326                 }
7327                 break;
7328         default:
7329                 rc = -EINVAL;
7330         }
7331
7332         IWL_DEBUG_MAC80211("leave\n");
7333         mutex_unlock(&priv->mutex);
7334
7335         return rc;
7336 }
7337
7338 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7339                            const struct ieee80211_tx_queue_params *params)
7340 {
7341         struct iwl_priv *priv = hw->priv;
7342 #ifdef CONFIG_IWLWIFI_QOS
7343         unsigned long flags;
7344         int q;
7345 #endif /* CONFIG_IWL_QOS */
7346
7347         IWL_DEBUG_MAC80211("enter\n");
7348
7349         if (!iwl_is_ready_rf(priv)) {
7350                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7351                 return -EIO;
7352         }
7353
7354         if (queue >= AC_NUM) {
7355                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7356                 return 0;
7357         }
7358
7359 #ifdef CONFIG_IWLWIFI_QOS
7360         if (!priv->qos_data.qos_enable) {
7361                 priv->qos_data.qos_active = 0;
7362                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7363                 return 0;
7364         }
7365         q = AC_NUM - 1 - queue;
7366
7367         spin_lock_irqsave(&priv->lock, flags);
7368
7369         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7370         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7371         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7372         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7373                         cpu_to_le16((params->burst_time * 100));
7374
7375         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7376         priv->qos_data.qos_active = 1;
7377
7378         spin_unlock_irqrestore(&priv->lock, flags);
7379
7380         mutex_lock(&priv->mutex);
7381         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7382                 iwl_activate_qos(priv, 1);
7383         else if (priv->assoc_id && iwl_is_associated(priv))
7384                 iwl_activate_qos(priv, 0);
7385
7386         mutex_unlock(&priv->mutex);
7387
7388 #endif /*CONFIG_IWLWIFI_QOS */
7389
7390         IWL_DEBUG_MAC80211("leave\n");
7391         return 0;
7392 }
7393
7394 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7395                                 struct ieee80211_tx_queue_stats *stats)
7396 {
7397         struct iwl_priv *priv = hw->priv;
7398         int i, avail;
7399         struct iwl_tx_queue *txq;
7400         struct iwl_queue *q;
7401         unsigned long flags;
7402
7403         IWL_DEBUG_MAC80211("enter\n");
7404
7405         if (!iwl_is_ready_rf(priv)) {
7406                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7407                 return -EIO;
7408         }
7409
7410         spin_lock_irqsave(&priv->lock, flags);
7411
7412         for (i = 0; i < AC_NUM; i++) {
7413                 txq = &priv->txq[i];
7414                 q = &txq->q;
7415                 avail = iwl_queue_space(q);
7416
7417                 stats->data[i].len = q->n_window - avail;
7418                 stats->data[i].limit = q->n_window - q->high_mark;
7419                 stats->data[i].count = q->n_window;
7420
7421         }
7422         spin_unlock_irqrestore(&priv->lock, flags);
7423
7424         IWL_DEBUG_MAC80211("leave\n");
7425
7426         return 0;
7427 }
7428
7429 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7430                              struct ieee80211_low_level_stats *stats)
7431 {
7432         IWL_DEBUG_MAC80211("enter\n");
7433         IWL_DEBUG_MAC80211("leave\n");
7434
7435         return 0;
7436 }
7437
7438 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7439 {
7440         IWL_DEBUG_MAC80211("enter\n");
7441         IWL_DEBUG_MAC80211("leave\n");
7442
7443         return 0;
7444 }
7445
7446 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7447 {
7448         struct iwl_priv *priv = hw->priv;
7449         unsigned long flags;
7450
7451         mutex_lock(&priv->mutex);
7452         IWL_DEBUG_MAC80211("enter\n");
7453
7454 #ifdef CONFIG_IWLWIFI_QOS
7455         iwl_reset_qos(priv);
7456 #endif
7457         cancel_delayed_work(&priv->post_associate);
7458
7459         spin_lock_irqsave(&priv->lock, flags);
7460         priv->assoc_id = 0;
7461         priv->assoc_capability = 0;
7462         priv->call_post_assoc_from_beacon = 0;
7463
7464         /* new association get rid of ibss beacon skb */
7465         if (priv->ibss_beacon)
7466                 dev_kfree_skb(priv->ibss_beacon);
7467
7468         priv->ibss_beacon = NULL;
7469
7470         priv->beacon_int = priv->hw->conf.beacon_int;
7471         priv->timestamp1 = 0;
7472         priv->timestamp0 = 0;
7473         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7474                 priv->beacon_int = 0;
7475
7476         spin_unlock_irqrestore(&priv->lock, flags);
7477
7478         /* Per mac80211.h: This is only used in IBSS mode... */
7479         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7480                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7481                 mutex_unlock(&priv->mutex);
7482                 return;
7483         }
7484
7485         if (!iwl_is_ready_rf(priv)) {
7486                 IWL_DEBUG_MAC80211("leave - not ready\n");
7487                 mutex_unlock(&priv->mutex);
7488                 return;
7489         }
7490
7491         priv->only_active_channel = 0;
7492
7493         iwl_set_rate(priv);
7494
7495         mutex_unlock(&priv->mutex);
7496
7497         IWL_DEBUG_MAC80211("leave\n");
7498
7499 }
7500
7501 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7502                                  struct ieee80211_tx_control *control)
7503 {
7504         struct iwl_priv *priv = hw->priv;
7505         unsigned long flags;
7506
7507         mutex_lock(&priv->mutex);
7508         IWL_DEBUG_MAC80211("enter\n");
7509
7510         if (!iwl_is_ready_rf(priv)) {
7511                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7512                 mutex_unlock(&priv->mutex);
7513                 return -EIO;
7514         }
7515
7516         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7517                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7518                 mutex_unlock(&priv->mutex);
7519                 return -EIO;
7520         }
7521
7522         spin_lock_irqsave(&priv->lock, flags);
7523
7524         if (priv->ibss_beacon)
7525                 dev_kfree_skb(priv->ibss_beacon);
7526
7527         priv->ibss_beacon = skb;
7528
7529         priv->assoc_id = 0;
7530
7531         IWL_DEBUG_MAC80211("leave\n");
7532         spin_unlock_irqrestore(&priv->lock, flags);
7533
7534 #ifdef CONFIG_IWLWIFI_QOS
7535         iwl_reset_qos(priv);
7536 #endif
7537
7538         queue_work(priv->workqueue, &priv->post_associate.work);
7539
7540         mutex_unlock(&priv->mutex);
7541
7542         return 0;
7543 }
7544
7545 /*****************************************************************************
7546  *
7547  * sysfs attributes
7548  *
7549  *****************************************************************************/
7550
7551 #ifdef CONFIG_IWLWIFI_DEBUG
7552
7553 /*
7554  * The following adds a new attribute to the sysfs representation
7555  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7556  * used for controlling the debug level.
7557  *
7558  * See the level definitions in iwl for details.
7559  */
7560
7561 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7562 {
7563         return sprintf(buf, "0x%08X\n", iwl_debug_level);
7564 }
7565 static ssize_t store_debug_level(struct device_driver *d,
7566                                  const char *buf, size_t count)
7567 {
7568         char *p = (char *)buf;
7569         u32 val;
7570
7571         val = simple_strtoul(p, &p, 0);
7572         if (p == buf)
7573                 printk(KERN_INFO DRV_NAME
7574                        ": %s is not in hex or decimal form.\n", buf);
7575         else
7576                 iwl_debug_level = val;
7577
7578         return strnlen(buf, count);
7579 }
7580
7581 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7582                    show_debug_level, store_debug_level);
7583
7584 #endif /* CONFIG_IWLWIFI_DEBUG */
7585
7586 static ssize_t show_rf_kill(struct device *d,
7587                             struct device_attribute *attr, char *buf)
7588 {
7589         /*
7590          * 0 - RF kill not enabled
7591          * 1 - SW based RF kill active (sysfs)
7592          * 2 - HW based RF kill active
7593          * 3 - Both HW and SW based RF kill active
7594          */
7595         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7596         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7597                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7598
7599         return sprintf(buf, "%i\n", val);
7600 }
7601
7602 static ssize_t store_rf_kill(struct device *d,
7603                              struct device_attribute *attr,
7604                              const char *buf, size_t count)
7605 {
7606         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7607
7608         mutex_lock(&priv->mutex);
7609         iwl_radio_kill_sw(priv, buf[0] == '1');
7610         mutex_unlock(&priv->mutex);
7611
7612         return count;
7613 }
7614
7615 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7616
7617 static ssize_t show_temperature(struct device *d,
7618                                 struct device_attribute *attr, char *buf)
7619 {
7620         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7621
7622         if (!iwl_is_alive(priv))
7623                 return -EAGAIN;
7624
7625         return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
7626 }
7627
7628 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7629
7630 static ssize_t show_rs_window(struct device *d,
7631                               struct device_attribute *attr,
7632                               char *buf)
7633 {
7634         struct iwl_priv *priv = d->driver_data;
7635         return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7636 }
7637 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7638
7639 static ssize_t show_tx_power(struct device *d,
7640                              struct device_attribute *attr, char *buf)
7641 {
7642         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7643         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7644 }
7645
7646 static ssize_t store_tx_power(struct device *d,
7647                               struct device_attribute *attr,
7648                               const char *buf, size_t count)
7649 {
7650         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7651         char *p = (char *)buf;
7652         u32 val;
7653
7654         val = simple_strtoul(p, &p, 10);
7655         if (p == buf)
7656                 printk(KERN_INFO DRV_NAME
7657                        ": %s is not in decimal form.\n", buf);
7658         else
7659                 iwl_hw_reg_set_txpower(priv, val);
7660
7661         return count;
7662 }
7663
7664 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7665
7666 static ssize_t show_flags(struct device *d,
7667                           struct device_attribute *attr, char *buf)
7668 {
7669         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7670
7671         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7672 }
7673
7674 static ssize_t store_flags(struct device *d,
7675                            struct device_attribute *attr,
7676                            const char *buf, size_t count)
7677 {
7678         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7679         u32 flags = simple_strtoul(buf, NULL, 0);
7680
7681         mutex_lock(&priv->mutex);
7682         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7683                 /* Cancel any currently running scans... */
7684                 if (iwl_scan_cancel_timeout(priv, 100))
7685                         IWL_WARNING("Could not cancel scan.\n");
7686                 else {
7687                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7688                                        flags);
7689                         priv->staging_rxon.flags = cpu_to_le32(flags);
7690                         iwl_commit_rxon(priv);
7691                 }
7692         }
7693         mutex_unlock(&priv->mutex);
7694
7695         return count;
7696 }
7697
7698 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7699
7700 static ssize_t show_filter_flags(struct device *d,
7701                                  struct device_attribute *attr, char *buf)
7702 {
7703         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7704
7705         return sprintf(buf, "0x%04X\n",
7706                 le32_to_cpu(priv->active_rxon.filter_flags));
7707 }
7708
7709 static ssize_t store_filter_flags(struct device *d,
7710                                   struct device_attribute *attr,
7711                                   const char *buf, size_t count)
7712 {
7713         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7714         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7715
7716         mutex_lock(&priv->mutex);
7717         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7718                 /* Cancel any currently running scans... */
7719                 if (iwl_scan_cancel_timeout(priv, 100))
7720                         IWL_WARNING("Could not cancel scan.\n");
7721                 else {
7722                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7723                                        "0x%04X\n", filter_flags);
7724                         priv->staging_rxon.filter_flags =
7725                                 cpu_to_le32(filter_flags);
7726                         iwl_commit_rxon(priv);
7727                 }
7728         }
7729         mutex_unlock(&priv->mutex);
7730
7731         return count;
7732 }
7733
7734 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7735                    store_filter_flags);
7736
7737 static ssize_t show_tune(struct device *d,
7738                          struct device_attribute *attr, char *buf)
7739 {
7740         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7741
7742         return sprintf(buf, "0x%04X\n",
7743                        (priv->phymode << 8) |
7744                         le16_to_cpu(priv->active_rxon.channel));
7745 }
7746
7747 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
7748
7749 static ssize_t store_tune(struct device *d,
7750                           struct device_attribute *attr,
7751                           const char *buf, size_t count)
7752 {
7753         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7754         char *p = (char *)buf;
7755         u16 tune = simple_strtoul(p, &p, 0);
7756         u8 phymode = (tune >> 8) & 0xff;
7757         u16 channel = tune & 0xff;
7758
7759         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
7760
7761         mutex_lock(&priv->mutex);
7762         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
7763             (priv->phymode != phymode)) {
7764                 const struct iwl_channel_info *ch_info;
7765
7766                 ch_info = iwl_get_channel_info(priv, phymode, channel);
7767                 if (!ch_info) {
7768                         IWL_WARNING("Requested invalid phymode/channel "
7769                                     "combination: %d %d\n", phymode, channel);
7770                         mutex_unlock(&priv->mutex);
7771                         return -EINVAL;
7772                 }
7773
7774                 /* Cancel any currently running scans... */
7775                 if (iwl_scan_cancel_timeout(priv, 100))
7776                         IWL_WARNING("Could not cancel scan.\n");
7777                 else {
7778                         IWL_DEBUG_INFO("Committing phymode and "
7779                                        "rxon.channel = %d %d\n",
7780                                        phymode, channel);
7781
7782                         iwl_set_rxon_channel(priv, phymode, channel);
7783                         iwl_set_flags_for_phymode(priv, phymode);
7784
7785                         iwl_set_rate(priv);
7786                         iwl_commit_rxon(priv);
7787                 }
7788         }
7789         mutex_unlock(&priv->mutex);
7790
7791         return count;
7792 }
7793
7794 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
7795
7796 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
7797
7798 static ssize_t show_measurement(struct device *d,
7799                                 struct device_attribute *attr, char *buf)
7800 {
7801         struct iwl_priv *priv = dev_get_drvdata(d);
7802         struct iwl_spectrum_notification measure_report;
7803         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7804         u8 *data = (u8 *) & measure_report;
7805         unsigned long flags;
7806
7807         spin_lock_irqsave(&priv->lock, flags);
7808         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7809                 spin_unlock_irqrestore(&priv->lock, flags);
7810                 return 0;
7811         }
7812         memcpy(&measure_report, &priv->measure_report, size);
7813         priv->measurement_status = 0;
7814         spin_unlock_irqrestore(&priv->lock, flags);
7815
7816         while (size && (PAGE_SIZE - len)) {
7817                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7818                                    PAGE_SIZE - len, 1);
7819                 len = strlen(buf);
7820                 if (PAGE_SIZE - len)
7821                         buf[len++] = '\n';
7822
7823                 ofs += 16;
7824                 size -= min(size, 16U);
7825         }
7826
7827         return len;
7828 }
7829
7830 static ssize_t store_measurement(struct device *d,
7831                                  struct device_attribute *attr,
7832                                  const char *buf, size_t count)
7833 {
7834         struct iwl_priv *priv = dev_get_drvdata(d);
7835         struct ieee80211_measurement_params params = {
7836                 .channel = le16_to_cpu(priv->active_rxon.channel),
7837                 .start_time = cpu_to_le64(priv->last_tsf),
7838                 .duration = cpu_to_le16(1),
7839         };
7840         u8 type = IWL_MEASURE_BASIC;
7841         u8 buffer[32];
7842         u8 channel;
7843
7844         if (count) {
7845                 char *p = buffer;
7846                 strncpy(buffer, buf, min(sizeof(buffer), count));
7847                 channel = simple_strtoul(p, NULL, 0);
7848                 if (channel)
7849                         params.channel = channel;
7850
7851                 p = buffer;
7852                 while (*p && *p != ' ')
7853                         p++;
7854                 if (*p)
7855                         type = simple_strtoul(p + 1, NULL, 0);
7856         }
7857
7858         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7859                        "channel %d (for '%s')\n", type, params.channel, buf);
7860         iwl_get_measurement(priv, &params, type);
7861
7862         return count;
7863 }
7864
7865 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7866                    show_measurement, store_measurement);
7867 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
7868
7869 static ssize_t show_rate(struct device *d,
7870                          struct device_attribute *attr, char *buf)
7871 {
7872         struct iwl_priv *priv = dev_get_drvdata(d);
7873         unsigned long flags;
7874         int i;
7875
7876         spin_lock_irqsave(&priv->sta_lock, flags);
7877         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
7878                 i = priv->stations[IWL_AP_ID].current_rate.s.rate;
7879         else
7880                 i = priv->stations[IWL_STA_ID].current_rate.s.rate;
7881         spin_unlock_irqrestore(&priv->sta_lock, flags);
7882
7883         i = iwl_rate_index_from_plcp(i);
7884         if (i == -1)
7885                 return sprintf(buf, "0\n");
7886
7887         return sprintf(buf, "%d%s\n",
7888                        (iwl_rates[i].ieee >> 1),
7889                        (iwl_rates[i].ieee & 0x1) ? ".5" : "");
7890 }
7891
7892 static DEVICE_ATTR(rate, S_IRUSR, show_rate, NULL);
7893
7894 static ssize_t store_retry_rate(struct device *d,
7895                                 struct device_attribute *attr,
7896                                 const char *buf, size_t count)
7897 {
7898         struct iwl_priv *priv = dev_get_drvdata(d);
7899
7900         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7901         if (priv->retry_rate <= 0)
7902                 priv->retry_rate = 1;
7903
7904         return count;
7905 }
7906
7907 static ssize_t show_retry_rate(struct device *d,
7908                                struct device_attribute *attr, char *buf)
7909 {
7910         struct iwl_priv *priv = dev_get_drvdata(d);
7911         return sprintf(buf, "%d", priv->retry_rate);
7912 }
7913
7914 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7915                    store_retry_rate);
7916
7917 static ssize_t store_power_level(struct device *d,
7918                                  struct device_attribute *attr,
7919                                  const char *buf, size_t count)
7920 {
7921         struct iwl_priv *priv = dev_get_drvdata(d);
7922         int rc;
7923         int mode;
7924
7925         mode = simple_strtoul(buf, NULL, 0);
7926         mutex_lock(&priv->mutex);
7927
7928         if (!iwl_is_ready(priv)) {
7929                 rc = -EAGAIN;
7930                 goto out;
7931         }
7932
7933         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7934                 mode = IWL_POWER_AC;
7935         else
7936                 mode |= IWL_POWER_ENABLED;
7937
7938         if (mode != priv->power_mode) {
7939                 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7940                 if (rc) {
7941                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7942                         goto out;
7943                 }
7944                 priv->power_mode = mode;
7945         }
7946
7947         rc = count;
7948
7949  out:
7950         mutex_unlock(&priv->mutex);
7951         return rc;
7952 }
7953
7954 #define MAX_WX_STRING 80
7955
7956 /* Values are in microsecond */
7957 static const s32 timeout_duration[] = {
7958         350000,
7959         250000,
7960         75000,
7961         37000,
7962         25000,
7963 };
7964 static const s32 period_duration[] = {
7965         400000,
7966         700000,
7967         1000000,
7968         1000000,
7969         1000000
7970 };
7971
7972 static ssize_t show_power_level(struct device *d,
7973                                 struct device_attribute *attr, char *buf)
7974 {
7975         struct iwl_priv *priv = dev_get_drvdata(d);
7976         int level = IWL_POWER_LEVEL(priv->power_mode);
7977         char *p = buf;
7978
7979         p += sprintf(p, "%d ", level);
7980         switch (level) {
7981         case IWL_POWER_MODE_CAM:
7982         case IWL_POWER_AC:
7983                 p += sprintf(p, "(AC)");
7984                 break;
7985         case IWL_POWER_BATTERY:
7986                 p += sprintf(p, "(BATTERY)");
7987                 break;
7988         default:
7989                 p += sprintf(p,
7990                              "(Timeout %dms, Period %dms)",
7991                              timeout_duration[level - 1] / 1000,
7992                              period_duration[level - 1] / 1000);
7993         }
7994
7995         if (!(priv->power_mode & IWL_POWER_ENABLED))
7996                 p += sprintf(p, " OFF\n");
7997         else
7998                 p += sprintf(p, " \n");
7999
8000         return (p - buf + 1);
8001
8002 }
8003
8004 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8005                    store_power_level);
8006
8007 static ssize_t show_channels(struct device *d,
8008                              struct device_attribute *attr, char *buf)
8009 {
8010         struct iwl_priv *priv = dev_get_drvdata(d);
8011         int len = 0, i;
8012         struct ieee80211_channel *channels = NULL;
8013         const struct ieee80211_hw_mode *hw_mode = NULL;
8014         int count = 0;
8015
8016         if (!iwl_is_ready(priv))
8017                 return -EAGAIN;
8018
8019         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8020         if (!hw_mode)
8021                 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8022         if (hw_mode) {
8023                 channels = hw_mode->channels;
8024                 count = hw_mode->num_channels;
8025         }
8026
8027         len +=
8028             sprintf(&buf[len],
8029                     "Displaying %d channels in 2.4GHz band "
8030                     "(802.11bg):\n", count);
8031
8032         for (i = 0; i < count; i++)
8033                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8034                                channels[i].chan,
8035                                channels[i].power_level,
8036                                channels[i].
8037                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8038                                " (IEEE 802.11h required)" : "",
8039                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8040                                 || (channels[i].
8041                                     flag &
8042                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8043                                ", IBSS",
8044                                channels[i].
8045                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8046                                "active/passive" : "passive only");
8047
8048         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8049         if (hw_mode) {
8050                 channels = hw_mode->channels;
8051                 count = hw_mode->num_channels;
8052         } else {
8053                 channels = NULL;
8054                 count = 0;
8055         }
8056
8057         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8058                        "(802.11a):\n", count);
8059
8060         for (i = 0; i < count; i++)
8061                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8062                                channels[i].chan,
8063                                channels[i].power_level,
8064                                channels[i].
8065                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8066                                " (IEEE 802.11h required)" : "",
8067                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8068                                 || (channels[i].
8069                                     flag &
8070                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8071                                ", IBSS",
8072                                channels[i].
8073                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8074                                "active/passive" : "passive only");
8075
8076         return len;
8077 }
8078
8079 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8080
8081 static ssize_t show_statistics(struct device *d,
8082                                struct device_attribute *attr, char *buf)
8083 {
8084         struct iwl_priv *priv = dev_get_drvdata(d);
8085         u32 size = sizeof(struct iwl_notif_statistics);
8086         u32 len = 0, ofs = 0;
8087         u8 *data = (u8 *) & priv->statistics;
8088         int rc = 0;
8089
8090         if (!iwl_is_alive(priv))
8091                 return -EAGAIN;
8092
8093         mutex_lock(&priv->mutex);
8094         rc = iwl_send_statistics_request(priv);
8095         mutex_unlock(&priv->mutex);
8096
8097         if (rc) {
8098                 len = sprintf(buf,
8099                               "Error sending statistics request: 0x%08X\n", rc);
8100                 return len;
8101         }
8102
8103         while (size && (PAGE_SIZE - len)) {
8104                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8105                                    PAGE_SIZE - len, 1);
8106                 len = strlen(buf);
8107                 if (PAGE_SIZE - len)
8108                         buf[len++] = '\n';
8109
8110                 ofs += 16;
8111                 size -= min(size, 16U);
8112         }
8113
8114         return len;
8115 }
8116
8117 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8118
8119 static ssize_t show_antenna(struct device *d,
8120                             struct device_attribute *attr, char *buf)
8121 {
8122         struct iwl_priv *priv = dev_get_drvdata(d);
8123
8124         if (!iwl_is_alive(priv))
8125                 return -EAGAIN;
8126
8127         return sprintf(buf, "%d\n", priv->antenna);
8128 }
8129
8130 static ssize_t store_antenna(struct device *d,
8131                              struct device_attribute *attr,
8132                              const char *buf, size_t count)
8133 {
8134         int ant;
8135         struct iwl_priv *priv = dev_get_drvdata(d);
8136
8137         if (count == 0)
8138                 return 0;
8139
8140         if (sscanf(buf, "%1i", &ant) != 1) {
8141                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8142                 return count;
8143         }
8144
8145         if ((ant >= 0) && (ant <= 2)) {
8146                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8147                 priv->antenna = (enum iwl_antenna)ant;
8148         } else
8149                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8150
8151
8152         return count;
8153 }
8154
8155 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8156
8157 static ssize_t show_status(struct device *d,
8158                            struct device_attribute *attr, char *buf)
8159 {
8160         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8161         if (!iwl_is_alive(priv))
8162                 return -EAGAIN;
8163         return sprintf(buf, "0x%08x\n", (int)priv->status);
8164 }
8165
8166 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8167
8168 static ssize_t dump_error_log(struct device *d,
8169                               struct device_attribute *attr,
8170                               const char *buf, size_t count)
8171 {
8172         char *p = (char *)buf;
8173
8174         if (p[0] == '1')
8175                 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8176
8177         return strnlen(buf, count);
8178 }
8179
8180 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8181
8182 static ssize_t dump_event_log(struct device *d,
8183                               struct device_attribute *attr,
8184                               const char *buf, size_t count)
8185 {
8186         char *p = (char *)buf;
8187
8188         if (p[0] == '1')
8189                 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8190
8191         return strnlen(buf, count);
8192 }
8193
8194 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8195
8196 /*****************************************************************************
8197  *
8198  * driver setup and teardown
8199  *
8200  *****************************************************************************/
8201
8202 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8203 {
8204         priv->workqueue = create_workqueue(DRV_NAME);
8205
8206         init_waitqueue_head(&priv->wait_command_queue);
8207
8208         INIT_WORK(&priv->up, iwl_bg_up);
8209         INIT_WORK(&priv->restart, iwl_bg_restart);
8210         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8211         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8212         INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8213         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8214         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8215         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8216         INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8217         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8218         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8219         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8220
8221         iwl_hw_setup_deferred_work(priv);
8222
8223         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8224                      iwl_irq_tasklet, (unsigned long)priv);
8225 }
8226
8227 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8228 {
8229         iwl_hw_cancel_deferred_work(priv);
8230
8231         cancel_delayed_work(&priv->scan_check);
8232         cancel_delayed_work(&priv->alive_start);
8233         cancel_delayed_work(&priv->post_associate);
8234         cancel_work_sync(&priv->beacon_update);
8235 }
8236
8237 static struct attribute *iwl_sysfs_entries[] = {
8238         &dev_attr_antenna.attr,
8239         &dev_attr_channels.attr,
8240         &dev_attr_dump_errors.attr,
8241         &dev_attr_dump_events.attr,
8242         &dev_attr_flags.attr,
8243         &dev_attr_filter_flags.attr,
8244 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8245         &dev_attr_measurement.attr,
8246 #endif
8247         &dev_attr_power_level.attr,
8248         &dev_attr_rate.attr,
8249         &dev_attr_retry_rate.attr,
8250         &dev_attr_rf_kill.attr,
8251         &dev_attr_rs_window.attr,
8252         &dev_attr_statistics.attr,
8253         &dev_attr_status.attr,
8254         &dev_attr_temperature.attr,
8255         &dev_attr_tune.attr,
8256         &dev_attr_tx_power.attr,
8257
8258         NULL
8259 };
8260
8261 static struct attribute_group iwl_attribute_group = {
8262         .name = NULL,           /* put in device directory */
8263         .attrs = iwl_sysfs_entries,
8264 };
8265
8266 static struct ieee80211_ops iwl_hw_ops = {
8267         .tx = iwl_mac_tx,
8268         .start = iwl_mac_start,
8269         .stop = iwl_mac_stop,
8270         .add_interface = iwl_mac_add_interface,
8271         .remove_interface = iwl_mac_remove_interface,
8272         .config = iwl_mac_config,
8273         .config_interface = iwl_mac_config_interface,
8274         .configure_filter = iwl_configure_filter,
8275         .set_key = iwl_mac_set_key,
8276         .get_stats = iwl_mac_get_stats,
8277         .get_tx_stats = iwl_mac_get_tx_stats,
8278         .conf_tx = iwl_mac_conf_tx,
8279         .get_tsf = iwl_mac_get_tsf,
8280         .reset_tsf = iwl_mac_reset_tsf,
8281         .beacon_update = iwl_mac_beacon_update,
8282         .hw_scan = iwl_mac_hw_scan
8283 };
8284
8285 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8286 {
8287         int err = 0;
8288         u32 pci_id;
8289         struct iwl_priv *priv;
8290         struct ieee80211_hw *hw;
8291         int i;
8292
8293         if (iwl_param_disable_hw_scan) {
8294                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8295                 iwl_hw_ops.hw_scan = NULL;
8296         }
8297
8298         if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8299             (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8300                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8301                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8302                 err = -EINVAL;
8303                 goto out;
8304         }
8305
8306         /* mac80211 allocates memory for this device instance, including
8307          *   space for this driver's private structure */
8308         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8309         if (hw == NULL) {
8310                 IWL_ERROR("Can not allocate network device\n");
8311                 err = -ENOMEM;
8312                 goto out;
8313         }
8314         SET_IEEE80211_DEV(hw, &pdev->dev);
8315
8316         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8317         priv = hw->priv;
8318         priv->hw = hw;
8319
8320         priv->pci_dev = pdev;
8321         priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8322 #ifdef CONFIG_IWLWIFI_DEBUG
8323         iwl_debug_level = iwl_param_debug;
8324         atomic_set(&priv->restrict_refcnt, 0);
8325 #endif
8326         priv->retry_rate = 1;
8327
8328         priv->ibss_beacon = NULL;
8329
8330         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8331          *   the range of signal quality values that we'll provide.
8332          * Negative values for level/noise indicate that we'll provide dBm.
8333          * For WE, at least, non-0 values here *enable* display of values
8334          *   in app (iwconfig). */
8335         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8336         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8337         hw->max_signal = 100;   /* link quality indication (%) */
8338
8339         /* Tell mac80211 our Tx characteristics */
8340         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8341
8342         hw->queues = 4;
8343
8344         spin_lock_init(&priv->lock);
8345         spin_lock_init(&priv->power_data.lock);
8346         spin_lock_init(&priv->sta_lock);
8347         spin_lock_init(&priv->hcmd_lock);
8348
8349         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8350                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8351
8352         INIT_LIST_HEAD(&priv->free_frames);
8353
8354         mutex_init(&priv->mutex);
8355         if (pci_enable_device(pdev)) {
8356                 err = -ENODEV;
8357                 goto out_ieee80211_free_hw;
8358         }
8359
8360         pci_set_master(pdev);
8361
8362         iwl_clear_stations_table(priv);
8363
8364         priv->data_retry_limit = -1;
8365         priv->ieee_channels = NULL;
8366         priv->ieee_rates = NULL;
8367         priv->phymode = -1;
8368
8369         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8370         if (!err)
8371                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8372         if (err) {
8373                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8374                 goto out_pci_disable_device;
8375         }
8376
8377         pci_set_drvdata(pdev, priv);
8378         err = pci_request_regions(pdev, DRV_NAME);
8379         if (err)
8380                 goto out_pci_disable_device;
8381         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8382          * PCI Tx retries from interfering with C3 CPU state */
8383         pci_write_config_byte(pdev, 0x41, 0x00);
8384         priv->hw_base = pci_iomap(pdev, 0, 0);
8385         if (!priv->hw_base) {
8386                 err = -ENODEV;
8387                 goto out_pci_release_regions;
8388         }
8389
8390         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8391                         (unsigned long long) pci_resource_len(pdev, 0));
8392         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8393
8394         /* Initialize module parameter values here */
8395
8396         if (iwl_param_disable) {
8397                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8398                 IWL_DEBUG_INFO("Radio disabled.\n");
8399         }
8400
8401         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8402
8403         pci_id =
8404             (priv->pci_dev->device << 16) | priv->pci_dev->subsystem_device;
8405
8406         switch (pci_id) {
8407         case 0x42221005:        /* 0x4222 0x8086 0x1005 is BG SKU */
8408         case 0x42221034:        /* 0x4222 0x8086 0x1034 is BG SKU */
8409         case 0x42271014:        /* 0x4227 0x8086 0x1014 is BG SKU */
8410         case 0x42221044:        /* 0x4222 0x8086 0x1044 is BG SKU */
8411                 priv->is_abg = 0;
8412                 break;
8413
8414         /*
8415          * Rest are assumed ABG SKU -- if this is not the
8416          * case then the card will get the wrong 'Detected'
8417          * line in the kernel log however the code that
8418          * initializes the GEO table will detect no A-band
8419          * channels and remove the is_abg mask.
8420          */
8421         default:
8422                 priv->is_abg = 1;
8423                 break;
8424         }
8425
8426         printk(KERN_INFO DRV_NAME
8427                ": Detected Intel PRO/Wireless 3945%sBG Network Connection\n",
8428                priv->is_abg ? "A" : "");
8429
8430         /* Device-specific setup */
8431         if (iwl_hw_set_hw_setting(priv)) {
8432                 IWL_ERROR("failed to set hw settings\n");
8433                 mutex_unlock(&priv->mutex);
8434                 goto out_iounmap;
8435         }
8436
8437 #ifdef CONFIG_IWLWIFI_QOS
8438         if (iwl_param_qos_enable)
8439                 priv->qos_data.qos_enable = 1;
8440
8441         iwl_reset_qos(priv);
8442
8443         priv->qos_data.qos_active = 0;
8444         priv->qos_data.qos_cap.val = 0;
8445 #endif /* CONFIG_IWLWIFI_QOS */
8446
8447         iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
8448         iwl_setup_deferred_work(priv);
8449         iwl_setup_rx_handlers(priv);
8450
8451         priv->rates_mask = IWL_RATES_MASK;
8452         /* If power management is turned on, default to AC mode */
8453         priv->power_mode = IWL_POWER_AC;
8454         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8455
8456         pci_enable_msi(pdev);
8457
8458         err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
8459         if (err) {
8460                 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
8461                 goto out_disable_msi;
8462         }
8463
8464         mutex_lock(&priv->mutex);
8465
8466         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
8467         if (err) {
8468                 IWL_ERROR("failed to create sysfs device attributes\n");
8469                 mutex_unlock(&priv->mutex);
8470                 goto out_release_irq;
8471         }
8472
8473         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
8474          * ucode filename and max sizes are card-specific. */
8475         err = iwl_read_ucode(priv);
8476         if (err) {
8477                 IWL_ERROR("Could not read microcode: %d\n", err);
8478                 mutex_unlock(&priv->mutex);
8479                 goto out_pci_alloc;
8480         }
8481
8482         mutex_unlock(&priv->mutex);
8483
8484         IWL_DEBUG_INFO("Queing UP work.\n");
8485
8486         queue_work(priv->workqueue, &priv->up);
8487
8488         return 0;
8489
8490  out_pci_alloc:
8491         iwl_dealloc_ucode_pci(priv);
8492
8493         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8494
8495  out_release_irq:
8496         free_irq(pdev->irq, priv);
8497
8498  out_disable_msi:
8499         pci_disable_msi(pdev);
8500         destroy_workqueue(priv->workqueue);
8501         priv->workqueue = NULL;
8502         iwl_unset_hw_setting(priv);
8503
8504  out_iounmap:
8505         pci_iounmap(pdev, priv->hw_base);
8506  out_pci_release_regions:
8507         pci_release_regions(pdev);
8508  out_pci_disable_device:
8509         pci_disable_device(pdev);
8510         pci_set_drvdata(pdev, NULL);
8511  out_ieee80211_free_hw:
8512         ieee80211_free_hw(priv->hw);
8513  out:
8514         return err;
8515 }
8516
8517 static void iwl_pci_remove(struct pci_dev *pdev)
8518 {
8519         struct iwl_priv *priv = pci_get_drvdata(pdev);
8520         struct list_head *p, *q;
8521         int i;
8522
8523         if (!priv)
8524                 return;
8525
8526         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8527
8528         mutex_lock(&priv->mutex);
8529         set_bit(STATUS_EXIT_PENDING, &priv->status);
8530         __iwl_down(priv);
8531         mutex_unlock(&priv->mutex);
8532
8533         /* Free MAC hash list for ADHOC */
8534         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8535                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8536                         list_del(p);
8537                         kfree(list_entry(p, struct iwl_ibss_seq, list));
8538                 }
8539         }
8540
8541         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
8542
8543         iwl_dealloc_ucode_pci(priv);
8544
8545         if (priv->rxq.bd)
8546                 iwl_rx_queue_free(priv, &priv->rxq);
8547         iwl_hw_txq_ctx_free(priv);
8548
8549         iwl_unset_hw_setting(priv);
8550         iwl_clear_stations_table(priv);
8551
8552         if (priv->mac80211_registered) {
8553                 ieee80211_unregister_hw(priv->hw);
8554                 iwl_rate_control_unregister(priv->hw);
8555         }
8556
8557         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
8558          * priv->workqueue... so we can't take down the workqueue
8559          * until now... */
8560         destroy_workqueue(priv->workqueue);
8561         priv->workqueue = NULL;
8562
8563         free_irq(pdev->irq, priv);
8564         pci_disable_msi(pdev);
8565         pci_iounmap(pdev, priv->hw_base);
8566         pci_release_regions(pdev);
8567         pci_disable_device(pdev);
8568         pci_set_drvdata(pdev, NULL);
8569
8570         kfree(priv->channel_info);
8571
8572         kfree(priv->ieee_channels);
8573         kfree(priv->ieee_rates);
8574
8575         if (priv->ibss_beacon)
8576                 dev_kfree_skb(priv->ibss_beacon);
8577
8578         ieee80211_free_hw(priv->hw);
8579 }
8580
8581 #ifdef CONFIG_PM
8582
8583 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8584 {
8585         struct iwl_priv *priv = pci_get_drvdata(pdev);
8586
8587         mutex_lock(&priv->mutex);
8588
8589         set_bit(STATUS_IN_SUSPEND, &priv->status);
8590
8591         /* Take down the device; powers it off, etc. */
8592         __iwl_down(priv);
8593
8594         if (priv->mac80211_registered)
8595                 ieee80211_stop_queues(priv->hw);
8596
8597         pci_save_state(pdev);
8598         pci_disable_device(pdev);
8599         pci_set_power_state(pdev, PCI_D3hot);
8600
8601         mutex_unlock(&priv->mutex);
8602
8603         return 0;
8604 }
8605
8606 static void iwl_resume(struct iwl_priv *priv)
8607 {
8608         unsigned long flags;
8609
8610         /* The following it a temporary work around due to the
8611          * suspend / resume not fully initializing the NIC correctly.
8612          * Without all of the following, resume will not attempt to take
8613          * down the NIC (it shouldn't really need to) and will just try
8614          * and bring the NIC back up.  However that fails during the
8615          * ucode verification process.  This then causes iwl_down to be
8616          * called *after* iwl_hw_nic_init() has succeeded -- which
8617          * then lets the next init sequence succeed.  So, we've
8618          * replicated all of that NIC init code here... */
8619
8620         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8621
8622         iwl_hw_nic_init(priv);
8623
8624         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8625         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
8626                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
8627         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
8628         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8629         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
8630
8631         /* tell the device to stop sending interrupts */
8632         iwl_disable_interrupts(priv);
8633
8634         spin_lock_irqsave(&priv->lock, flags);
8635         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
8636
8637         if (!iwl_grab_restricted_access(priv)) {
8638                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
8639                                          APMG_CLK_VAL_DMA_CLK_RQT);
8640                 iwl_release_restricted_access(priv);
8641         }
8642         spin_unlock_irqrestore(&priv->lock, flags);
8643
8644         udelay(5);
8645
8646         iwl_hw_nic_reset(priv);
8647
8648         /* Bring the device back up */
8649         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8650         queue_work(priv->workqueue, &priv->up);
8651 }
8652
8653 static int iwl_pci_resume(struct pci_dev *pdev)
8654 {
8655         struct iwl_priv *priv = pci_get_drvdata(pdev);
8656         int err;
8657
8658         printk(KERN_INFO "Coming out of suspend...\n");
8659
8660         mutex_lock(&priv->mutex);
8661
8662         pci_set_power_state(pdev, PCI_D0);
8663         err = pci_enable_device(pdev);
8664         pci_restore_state(pdev);
8665
8666         /*
8667          * Suspend/Resume resets the PCI configuration space, so we have to
8668          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
8669          * from interfering with C3 CPU state. pci_restore_state won't help
8670          * here since it only restores the first 64 bytes pci config header.
8671          */
8672         pci_write_config_byte(pdev, 0x41, 0x00);
8673
8674         iwl_resume(priv);
8675         mutex_unlock(&priv->mutex);
8676
8677         return 0;
8678 }
8679
8680 #endif /* CONFIG_PM */
8681
8682 /*****************************************************************************
8683  *
8684  * driver and module entry point
8685  *
8686  *****************************************************************************/
8687
8688 static struct pci_driver iwl_driver = {
8689         .name = DRV_NAME,
8690         .id_table = iwl_hw_card_ids,
8691         .probe = iwl_pci_probe,
8692         .remove = __devexit_p(iwl_pci_remove),
8693 #ifdef CONFIG_PM
8694         .suspend = iwl_pci_suspend,
8695         .resume = iwl_pci_resume,
8696 #endif
8697 };
8698
8699 static int __init iwl_init(void)
8700 {
8701
8702         int ret;
8703         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8704         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8705         ret = pci_register_driver(&iwl_driver);
8706         if (ret) {
8707                 IWL_ERROR("Unable to initialize PCI module\n");
8708                 return ret;
8709         }
8710 #ifdef CONFIG_IWLWIFI_DEBUG
8711         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
8712         if (ret) {
8713                 IWL_ERROR("Unable to create driver sysfs file\n");
8714                 pci_unregister_driver(&iwl_driver);
8715                 return ret;
8716         }
8717 #endif
8718
8719         return ret;
8720 }
8721
8722 static void __exit iwl_exit(void)
8723 {
8724 #ifdef CONFIG_IWLWIFI_DEBUG
8725         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
8726 #endif
8727         pci_unregister_driver(&iwl_driver);
8728 }
8729
8730 module_param_named(antenna, iwl_param_antenna, int, 0444);
8731 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8732 module_param_named(disable, iwl_param_disable, int, 0444);
8733 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8734 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
8735 MODULE_PARM_DESC(hwcrypto,
8736                  "using hardware crypto engine (default 0 [software])\n");
8737 module_param_named(debug, iwl_param_debug, int, 0444);
8738 MODULE_PARM_DESC(debug, "debug output mask");
8739 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
8740 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8741
8742 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
8743 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8744
8745 /* QoS */
8746 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
8747 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8748
8749 module_exit(iwl_exit);
8750 module_init(iwl_init);