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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-eeprom.h"
  49 #include "iwl-core.h"
  50 #include "iwl-4965.h"
  51 #include "iwl-helpers.h"
  52
  53 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
  54                                   struct iwl4965_tx_queue *txq);
  55
  56 /******************************************************************************
  57  *
  58  * module boiler plate
  59  *
  60  ******************************************************************************/
  61
  62 /* module parameters */
  63 struct iwl_mod_params iwl4965_mod_params = {
  64         .num_of_queues = IWL_MAX_NUM_QUEUES,
  65         .enable_qos = 1,
  66         .amsdu_size_8K = 1,
  67         /* the rest are 0 by default */
  68 };
  69
  70 /*
  71  * module name, copyright, version, etc.
  72  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  73  */
  74
  75 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  76
  77 #ifdef CONFIG_IWLWIFI_DEBUG
  78 #define VD "d"
  79 #else
  80 #define VD
  81 #endif
  82
  83 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  84 #define VS "s"
  85 #else
  86 #define VS
  87 #endif
  88
  89 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  90
  91
  92 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  93 MODULE_VERSION(DRV_VERSION);
  94 MODULE_AUTHOR(DRV_COPYRIGHT);
  95 MODULE_LICENSE("GPL");
  96
  97 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
  98 {
  99         u16 fc = le16_to_cpu(hdr->frame_control);
 100         int hdr_len = ieee80211_get_hdrlen(fc);
 101
 102         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 103                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 104         return NULL;
 105 }
 106
 107 static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
 108                 struct iwl_priv *priv, enum ieee80211_band band)
 109 {
 110         return priv->hw->wiphy->bands[band];
 111 }
 112
 113 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 114 {
 115         /* Single white space is for Linksys APs */
 116         if (essid_len == 1 && essid[0] == ' ')
 117                 return 1;
 118
 119         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 120         while (essid_len) {
 121                 essid_len--;
 122                 if (essid[essid_len] != '\0')
 123                         return 0;
 124         }
 125
 126         return 1;
 127 }
 128
 129 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 130 {
 131         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 132         const char *s = essid;
 133         char *d = escaped;
 134
 135         if (iwl4965_is_empty_essid(essid, essid_len)) {
 136                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 137                 return escaped;
 138         }
 139
 140         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 141         while (essid_len--) {
 142                 if (*s == '\0') {
 143                         *d++ = '\\';
 144                         *d++ = '0';
 145                         s++;
 146                 } else
 147                         *d++ = *s++;
 148         }
 149         *d = '\0';
 150         return escaped;
 151 }
 152
 153 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 154  * DMA services
 155  *
 156  * Theory of operation
 157  *
 158  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 159  * of buffer descriptors, each of which points to one or more data buffers for
 160  * the device to read from or fill.  Driver and device exchange status of each
 161  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 162  * entries in each circular buffer, to protect against confusing empty and full
 163  * queue states.
 164  *
 165  * The device reads or writes the data in the queues via the device's several
 166  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 167  *
 168  * For Tx queue, there are low mark and high mark limits. If, after queuing
 169  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 170  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 171  * Tx queue resumed.
 172  *
 173  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 174  * queue (#4) for sending commands to the device firmware, and 15 other
 175  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 176  *
 177  * See more detailed info in iwl-4965-hw.h.
 178  ***************************************************/
 179
 180 int iwl4965_queue_space(const struct iwl4965_queue *q)
 181 {
 182         int s = q->read_ptr - q->write_ptr;
 183
 184         if (q->read_ptr > q->write_ptr)
 185                 s -= q->n_bd;
 186
 187         if (s <= 0)
 188                 s += q->n_window;
 189         /* keep some reserve to not confuse empty and full situations */
 190         s -= 2;
 191         if (s < 0)
 192                 s = 0;
 193         return s;
 194 }
 195
 196
 197 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 198 {
 199         return q->write_ptr > q->read_ptr ?
 200                 (i >= q->read_ptr && i < q->write_ptr) :
 201                 !(i < q->read_ptr && i >= q->write_ptr);
 202 }
 203
 204 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 205 {
 206         /* This is for scan command, the big buffer at end of command array */
 207         if (is_huge)
 208                 return q->n_window;     /* must be power of 2 */
 209
 210         /* Otherwise, use normal size buffers */
 211         return index & (q->n_window - 1);
 212 }
 213
 214 /**
 215  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 216  */
 217 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
 218                           int count, int slots_num, u32 id)
 219 {
 220         q->n_bd = count;
 221         q->n_window = slots_num;
 222         q->id = id;
 223
 224         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 225          * and iwl_queue_dec_wrap are broken. */
 226         BUG_ON(!is_power_of_2(count));
 227
 228         /* slots_num must be power-of-two size, otherwise
 229          * get_cmd_index is broken. */
 230         BUG_ON(!is_power_of_2(slots_num));
 231
 232         q->low_mark = q->n_window / 4;
 233         if (q->low_mark < 4)
 234                 q->low_mark = 4;
 235
 236         q->high_mark = q->n_window / 8;
 237         if (q->high_mark < 2)
 238                 q->high_mark = 2;
 239
 240         q->write_ptr = q->read_ptr = 0;
 241
 242         return 0;
 243 }
 244
 245 /**
 246  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 247  */
 248 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
 249                               struct iwl4965_tx_queue *txq, u32 id)
 250 {
 251         struct pci_dev *dev = priv->pci_dev;
 252
 253         /* Driver private data, only for Tx (not command) queues,
 254          * not shared with device. */
 255         if (id != IWL_CMD_QUEUE_NUM) {
 256                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 257                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 258                 if (!txq->txb) {
 259                         IWL_ERROR("kmalloc for auxiliary BD "
 260                                   "structures failed\n");
 261                         goto error;
 262                 }
 263         } else
 264                 txq->txb = NULL;
 265
 266         /* Circular buffer of transmit frame descriptors (TFDs),
 267          * shared with device */
 268         txq->bd = pci_alloc_consistent(dev,
 269                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 270                         &txq->q.dma_addr);
 271
 272         if (!txq->bd) {
 273                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 274                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 275                 goto error;
 276         }
 277         txq->q.id = id;
 278
 279         return 0;
 280
 281  error:
 282         if (txq->txb) {
 283                 kfree(txq->txb);
 284                 txq->txb = NULL;
 285         }
 286
 287         return -ENOMEM;
 288 }
 289
 290 /**
 291  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 292  */
 293 int iwl4965_tx_queue_init(struct iwl_priv *priv,
 294                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 295 {
 296         struct pci_dev *dev = priv->pci_dev;
 297         int len;
 298         int rc = 0;
 299
 300         /*
 301          * Alloc buffer array for commands (Tx or other types of commands).
 302          * For the command queue (#4), allocate command space + one big
 303          * command for scan, since scan command is very huge; the system will
 304          * not have two scans at the same time, so only one is needed.
 305          * For normal Tx queues (all other queues), no super-size command
 306          * space is needed.
 307          */
 308         len = sizeof(struct iwl4965_cmd) * slots_num;
 309         if (txq_id == IWL_CMD_QUEUE_NUM)
 310                 len +=  IWL_MAX_SCAN_SIZE;
 311         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 312         if (!txq->cmd)
 313                 return -ENOMEM;
 314
 315         /* Alloc driver data array and TFD circular buffer */
 316         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 317         if (rc) {
 318                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 319
 320                 return -ENOMEM;
 321         }
 322         txq->need_update = 0;
 323
 324         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 325          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 326         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 327
 328         /* Initialize queue's high/low-water marks, and head/tail indexes */
 329         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 330
 331         /* Tell device where to find queue */
 332         iwl4965_hw_tx_queue_init(priv, txq);
 333
 334         return 0;
 335 }
 336
 337 /**
 338  * iwl4965_tx_queue_free - Deallocate DMA queue.
 339  * @txq: Transmit queue to deallocate.
 340  *
 341  * Empty queue by removing and destroying all BD's.
 342  * Free all buffers.
 343  * 0-fill, but do not free "txq" descriptor structure.
 344  */
 345 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
 346 {
 347         struct iwl4965_queue *q = &txq->q;
 348         struct pci_dev *dev = priv->pci_dev;
 349         int len;
 350
 351         if (q->n_bd == 0)
 352                 return;
 353
 354         /* first, empty all BD's */
 355         for (; q->write_ptr != q->read_ptr;
 356              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 357                 iwl4965_hw_txq_free_tfd(priv, txq);
 358
 359         len = sizeof(struct iwl4965_cmd) * q->n_window;
 360         if (q->id == IWL_CMD_QUEUE_NUM)
 361                 len += IWL_MAX_SCAN_SIZE;
 362
 363         /* De-alloc array of command/tx buffers */
 364         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 365
 366         /* De-alloc circular buffer of TFDs */
 367         if (txq->q.n_bd)
 368                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 369                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 370
 371         /* De-alloc array of per-TFD driver data */
 372         if (txq->txb) {
 373                 kfree(txq->txb);
 374                 txq->txb = NULL;
 375         }
 376
 377         /* 0-fill queue descriptor structure */
 378         memset(txq, 0, sizeof(*txq));
 379 }
 380
 381 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 382
 383 /*************** STATION TABLE MANAGEMENT ****
 384  * mac80211 should be examined to determine if sta_info is duplicating
 385  * the functionality provided here
 386  */
 387
 388 /**************************************************************/
 389
 390 #if 0 /* temporary disable till we add real remove station */
 391 /**
 392  * iwl4965_remove_station - Remove driver's knowledge of station.
 393  *
 394  * NOTE:  This does not remove station from device's station table.
 395  */
 396 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 397 {
 398         int index = IWL_INVALID_STATION;
 399         int i;
 400         unsigned long flags;
 401
 402         spin_lock_irqsave(&priv->sta_lock, flags);
 403
 404         if (is_ap)
 405                 index = IWL_AP_ID;
 406         else if (is_broadcast_ether_addr(addr))
 407                 index = priv->hw_setting.bcast_sta_id;
 408         else
 409                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 410                         if (priv->stations[i].used &&
 411                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 412                                                 addr)) {
 413                                 index = i;
 414                                 break;
 415                         }
 416
 417         if (unlikely(index == IWL_INVALID_STATION))
 418                 goto out;
 419
 420         if (priv->stations[index].used) {
 421                 priv->stations[index].used = 0;
 422                 priv->num_stations--;
 423         }
 424
 425         BUG_ON(priv->num_stations < 0);
 426
 427 out:
 428         spin_unlock_irqrestore(&priv->sta_lock, flags);
 429         return 0;
 430 }
 431 #endif
 432
 433 /**
 434  * iwl4965_add_station_flags - Add station to tables in driver and device
 435  */
 436 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
 437                                 int is_ap, u8 flags, void *ht_data)
 438 {
 439         int i;
 440         int index = IWL_INVALID_STATION;
 441         struct iwl4965_station_entry *station;
 442         unsigned long flags_spin;
 443         DECLARE_MAC_BUF(mac);
 444
 445         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 446         if (is_ap)
 447                 index = IWL_AP_ID;
 448         else if (is_broadcast_ether_addr(addr))
 449                 index = priv->hw_setting.bcast_sta_id;
 450         else
 451                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 452                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 453                                                 addr)) {
 454                                 index = i;
 455                                 break;
 456                         }
 457
 458                         if (!priv->stations[i].used &&
 459                             index == IWL_INVALID_STATION)
 460                                 index = i;
 461                 }
 462
 463
 464         /* These two conditions have the same outcome, but keep them separate
 465           since they have different meanings */
 466         if (unlikely(index == IWL_INVALID_STATION)) {
 467                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 468                 return index;
 469         }
 470
 471         if (priv->stations[index].used &&
 472             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 473                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 474                 return index;
 475         }
 476
 477
 478         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 479         station = &priv->stations[index];
 480         station->used = 1;
 481         priv->num_stations++;
 482
 483         /* Set up the REPLY_ADD_STA command to send to device */
 484         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 485         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 486         station->sta.mode = 0;
 487         station->sta.sta.sta_id = index;
 488         station->sta.station_flags = 0;
 489
 490 #ifdef CONFIG_IWL4965_HT
 491         /* BCAST station and IBSS stations do not work in HT mode */
 492         if (index != priv->hw_setting.bcast_sta_id &&
 493             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 494                 iwl4965_set_ht_add_station(priv, index,
 495                                  (struct ieee80211_ht_info *) ht_data);
 496 #endif /*CONFIG_IWL4965_HT*/
 497
 498         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 499
 500         /* Add station to device's station table */
 501         iwl4965_send_add_station(priv, &station->sta, flags);
 502         return index;
 503
 504 }
 505
 506 /*************** DRIVER STATUS FUNCTIONS   *****/
 507
 508 static inline int iwl4965_is_ready(struct iwl_priv *priv)
 509 {
 510         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 511          * set but EXIT_PENDING is not */
 512         return test_bit(STATUS_READY, &priv->status) &&
 513                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 514                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 515 }
 516
 517 static inline int iwl4965_is_alive(struct iwl_priv *priv)
 518 {
 519         return test_bit(STATUS_ALIVE, &priv->status);
 520 }
 521
 522 static inline int iwl4965_is_init(struct iwl_priv *priv)
 523 {
 524         return test_bit(STATUS_INIT, &priv->status);
 525 }
 526
 527 static inline int iwl4965_is_rfkill(struct iwl_priv *priv)
 528 {
 529         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 530                test_bit(STATUS_RF_KILL_SW, &priv->status);
 531 }
 532
 533 static inline int iwl4965_is_ready_rf(struct iwl_priv *priv)
 534 {
 535
 536         if (iwl4965_is_rfkill(priv))
 537                 return 0;
 538
 539         return iwl4965_is_ready(priv);
 540 }
 541
 542 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 543
 544 #define IWL_CMD(x) case x : return #x
 545
 546 static const char *get_cmd_string(u8 cmd)
 547 {
 548         switch (cmd) {
 549                 IWL_CMD(REPLY_ALIVE);
 550                 IWL_CMD(REPLY_ERROR);
 551                 IWL_CMD(REPLY_RXON);
 552                 IWL_CMD(REPLY_RXON_ASSOC);
 553                 IWL_CMD(REPLY_QOS_PARAM);
 554                 IWL_CMD(REPLY_RXON_TIMING);
 555                 IWL_CMD(REPLY_ADD_STA);
 556                 IWL_CMD(REPLY_REMOVE_STA);
 557                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 558                 IWL_CMD(REPLY_TX);
 559                 IWL_CMD(REPLY_RATE_SCALE);
 560                 IWL_CMD(REPLY_LEDS_CMD);
 561                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 562                 IWL_CMD(RADAR_NOTIFICATION);
 563                 IWL_CMD(REPLY_QUIET_CMD);
 564                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 565                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 566                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 567                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 568                 IWL_CMD(POWER_TABLE_CMD);
 569                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 570                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 571                 IWL_CMD(REPLY_SCAN_CMD);
 572                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 573                 IWL_CMD(SCAN_START_NOTIFICATION);
 574                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 575                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 576                 IWL_CMD(BEACON_NOTIFICATION);
 577                 IWL_CMD(REPLY_TX_BEACON);
 578                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 579                 IWL_CMD(QUIET_NOTIFICATION);
 580                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 581                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 582                 IWL_CMD(REPLY_BT_CONFIG);
 583                 IWL_CMD(REPLY_STATISTICS_CMD);
 584                 IWL_CMD(STATISTICS_NOTIFICATION);
 585                 IWL_CMD(REPLY_CARD_STATE_CMD);
 586                 IWL_CMD(CARD_STATE_NOTIFICATION);
 587                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 588                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 589                 IWL_CMD(SENSITIVITY_CMD);
 590                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 591                 IWL_CMD(REPLY_RX_PHY_CMD);
 592                 IWL_CMD(REPLY_RX_MPDU_CMD);
 593                 IWL_CMD(REPLY_4965_RX);
 594                 IWL_CMD(REPLY_COMPRESSED_BA);
 595         default:
 596                 return "UNKNOWN";
 597
 598         }
 599 }
 600
 601 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 602
 603 /**
 604  * iwl4965_enqueue_hcmd - enqueue a uCode command
 605  * @priv: device private data point
 606  * @cmd: a point to the ucode command structure
 607  *
 608  * The function returns < 0 values to indicate the operation is
 609  * failed. On success, it turns the index (> 0) of command in the
 610  * command queue.
 611  */
 612 static int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl4965_host_cmd *cmd)
 613 {
 614         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 615         struct iwl4965_queue *q = &txq->q;
 616         struct iwl4965_tfd_frame *tfd;
 617         u32 *control_flags;
 618         struct iwl4965_cmd *out_cmd;
 619         u32 idx;
 620         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 621         dma_addr_t phys_addr;
 622         int ret;
 623         unsigned long flags;
 624
 625         /* If any of the command structures end up being larger than
 626          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 627          * we will need to increase the size of the TFD entries */
 628         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 629                !(cmd->meta.flags & CMD_SIZE_HUGE));
 630
 631         if (iwl4965_is_rfkill(priv)) {
 632                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 633                 return -EIO;
 634         }
 635
 636         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 637                 IWL_ERROR("No space for Tx\n");
 638                 return -ENOSPC;
 639         }
 640
 641         spin_lock_irqsave(&priv->hcmd_lock, flags);
 642
 643         tfd = &txq->bd[q->write_ptr];
 644         memset(tfd, 0, sizeof(*tfd));
 645
 646         control_flags = (u32 *) tfd;
 647
 648         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 649         out_cmd = &txq->cmd[idx];
 650
 651         out_cmd->hdr.cmd = cmd->id;
 652         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 653         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 654
 655         /* At this point, the out_cmd now has all of the incoming cmd
 656          * information */
 657
 658         out_cmd->hdr.flags = 0;
 659         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 660                         INDEX_TO_SEQ(q->write_ptr));
 661         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 662                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 663
 664         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 665                         offsetof(struct iwl4965_cmd, hdr);
 666         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 667
 668         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 669                      "%d bytes at %d[%d]:%d\n",
 670                      get_cmd_string(out_cmd->hdr.cmd),
 671                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 672                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 673
 674         txq->need_update = 1;
 675
 676         /* Set up entry in queue's byte count circular buffer */
 677         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 678
 679         /* Increment and update queue's write index */
 680         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 681         iwl4965_tx_queue_update_write_ptr(priv, txq);
 682
 683         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 684         return ret ? ret : idx;
 685 }
 686
 687 static int iwl4965_send_cmd_async(struct iwl_priv *priv, struct iwl4965_host_cmd *cmd)
 688 {
 689         int ret;
 690
 691         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 692
 693         /* An asynchronous command can not expect an SKB to be set. */
 694         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 695
 696         /* An asynchronous command MUST have a callback. */
 697         BUG_ON(!cmd->meta.u.callback);
 698
 699         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 700                 return -EBUSY;
 701
 702         ret = iwl4965_enqueue_hcmd(priv, cmd);
 703         if (ret < 0) {
 704                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 705                           get_cmd_string(cmd->id), ret);
 706                 return ret;
 707         }
 708         return 0;
 709 }
 710
 711 static int iwl4965_send_cmd_sync(struct iwl_priv *priv, struct iwl4965_host_cmd *cmd)
 712 {
 713         int cmd_idx;
 714         int ret;
 715         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 716
 717         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 718
 719          /* A synchronous command can not have a callback set. */
 720         BUG_ON(cmd->meta.u.callback != NULL);
 721
 722         if (atomic_xchg(&entry, 1)) {
 723                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 724                           get_cmd_string(cmd->id));
 725                 return -EBUSY;
 726         }
 727
 728         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 729
 730         if (cmd->meta.flags & CMD_WANT_SKB)
 731                 cmd->meta.source = &cmd->meta;
 732
 733         cmd_idx = iwl4965_enqueue_hcmd(priv, cmd);
 734         if (cmd_idx < 0) {
 735                 ret = cmd_idx;
 736                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 737                           get_cmd_string(cmd->id), ret);
 738                 goto out;
 739         }
 740
 741         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 742                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 743                         HOST_COMPLETE_TIMEOUT);
 744         if (!ret) {
 745                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 746                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 747                                   get_cmd_string(cmd->id),
 748                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 749
 750                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 751                         ret = -ETIMEDOUT;
 752                         goto cancel;
 753                 }
 754         }
 755
 756         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 757                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 758                                get_cmd_string(cmd->id));
 759                 ret = -ECANCELED;
 760                 goto fail;
 761         }
 762         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 763                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 764                                get_cmd_string(cmd->id));
 765                 ret = -EIO;
 766                 goto fail;
 767         }
 768         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 769                 IWL_ERROR("Error: Response NULL in '%s'\n",
 770                           get_cmd_string(cmd->id));
 771                 ret = -EIO;
 772                 goto out;
 773         }
 774
 775         ret = 0;
 776         goto out;
 777
 778 cancel:
 779         if (cmd->meta.flags & CMD_WANT_SKB) {
 780                 struct iwl4965_cmd *qcmd;
 781
 782                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 783                  * TX cmd queue. Otherwise in case the cmd comes
 784                  * in later, it will possibly set an invalid
 785                  * address (cmd->meta.source). */
 786                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 787                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 788         }
 789 fail:
 790         if (cmd->meta.u.skb) {
 791                 dev_kfree_skb_any(cmd->meta.u.skb);
 792                 cmd->meta.u.skb = NULL;
 793         }
 794 out:
 795         atomic_set(&entry, 0);
 796         return ret;
 797 }
 798
 799 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 800 {
 801         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 802
 803         if (hw_decrypt)
 804                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 805         else
 806                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 807
 808 }
 809
 810 int iwl4965_send_cmd(struct iwl_priv *priv, struct iwl4965_host_cmd *cmd)
 811 {
 812         if (cmd->meta.flags & CMD_ASYNC)
 813                 return iwl4965_send_cmd_async(priv, cmd);
 814
 815         return iwl4965_send_cmd_sync(priv, cmd);
 816 }
 817
 818 int iwl4965_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
 819 {
 820         struct iwl4965_host_cmd cmd = {
 821                 .id = id,
 822                 .len = len,
 823                 .data = data,
 824         };
 825
 826         return iwl4965_send_cmd_sync(priv, &cmd);
 827 }
 828
 829 static int __must_check iwl4965_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
 830 {
 831         struct iwl4965_host_cmd cmd = {
 832                 .id = id,
 833                 .len = sizeof(val),
 834                 .data = &val,
 835         };
 836
 837         return iwl4965_send_cmd_sync(priv, &cmd);
 838 }
 839
 840 int iwl4965_send_statistics_request(struct iwl_priv *priv)
 841 {
 842         return iwl4965_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 843 }
 844
 845 /**
 846  * iwl4965_rxon_add_station - add station into station table.
 847  *
 848  * there is only one AP station with id= IWL_AP_ID
 849  * NOTE: mutex must be held before calling this fnction
 850  */
 851 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 852                                 const u8 *addr, int is_ap)
 853 {
 854         u8 sta_id;
 855
 856         /* Add station to device's station table */
 857 #ifdef CONFIG_IWL4965_HT
 858         struct ieee80211_conf *conf = &priv->hw->conf;
 859         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 860
 861         if ((is_ap) &&
 862             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 863             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 864                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 865                                                    0, cur_ht_config);
 866         else
 867 #endif /* CONFIG_IWL4965_HT */
 868                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 869                                                    0, NULL);
 870
 871         /* Set up default rate scaling table in device's station table */
 872         iwl4965_add_station(priv, addr, is_ap);
 873
 874         return sta_id;
 875 }
 876
 877 /**
 878  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 879  *
 880  * NOTE:  This is really only useful during development and can eventually
 881  * be #ifdef'd out once the driver is stable and folks aren't actively
 882  * making changes
 883  */
 884 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 885 {
 886         int error = 0;
 887         int counter = 1;
 888
 889         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 890                 error |= le32_to_cpu(rxon->flags &
 891                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 892                                  RXON_FLG_RADAR_DETECT_MSK));
 893                 if (error)
 894                         IWL_WARNING("check 24G fields %d | %d\n",
 895                                     counter++, error);
 896         } else {
 897                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 898                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 899                 if (error)
 900                         IWL_WARNING("check 52 fields %d | %d\n",
 901                                     counter++, error);
 902                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 903                 if (error)
 904                         IWL_WARNING("check 52 CCK %d | %d\n",
 905                                     counter++, error);
 906         }
 907         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 908         if (error)
 909                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 910
 911         /* make sure basic rates 6Mbps and 1Mbps are supported */
 912         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 913                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 914         if (error)
 915                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 916
 917         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 918         if (error)
 919                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 920
 921         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 922                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 923         if (error)
 924                 IWL_WARNING("check CCK and short slot %d | %d\n",
 925                             counter++, error);
 926
 927         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 928                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 929         if (error)
 930                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 931                             counter++, error);
 932
 933         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 934                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 935         if (error)
 936                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 937                             counter++, error);
 938
 939         if (error)
 940                 IWL_WARNING("Tuning to channel %d\n",
 941                             le16_to_cpu(rxon->channel));
 942
 943         if (error) {
 944                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 945                 return -1;
 946         }
 947         return 0;
 948 }
 949
 950 /**
 951  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 952  * @priv: staging_rxon is compared to active_rxon
 953  *
 954  * If the RXON structure is changing enough to require a new tune,
 955  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 956  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 957  */
 958 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 959 {
 960
 961         /* These items are only settable from the full RXON command */
 962         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 963             compare_ether_addr(priv->staging_rxon.bssid_addr,
 964                                priv->active_rxon.bssid_addr) ||
 965             compare_ether_addr(priv->staging_rxon.node_addr,
 966                                priv->active_rxon.node_addr) ||
 967             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 968                                priv->active_rxon.wlap_bssid_addr) ||
 969             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 970             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 971             (priv->staging_rxon.air_propagation !=
 972              priv->active_rxon.air_propagation) ||
 973             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 974              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 975             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 976              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 977             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 978             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 979                 return 1;
 980
 981         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 982          * be updated with the RXON_ASSOC command -- however only some
 983          * flag transitions are allowed using RXON_ASSOC */
 984
 985         /* Check if we are not switching bands */
 986         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 987             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 988                 return 1;
 989
 990         /* Check if we are switching association toggle */
 991         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 992                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 993                 return 1;
 994
 995         return 0;
 996 }
 997
 998 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
 999 {
1000         int rc = 0;
1001         struct iwl4965_rx_packet *res = NULL;
1002         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1003         struct iwl4965_host_cmd cmd = {
1004                 .id = REPLY_RXON_ASSOC,
1005                 .len = sizeof(rxon_assoc),
1006                 .meta.flags = CMD_WANT_SKB,
1007                 .data = &rxon_assoc,
1008         };
1009         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
1010         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
1011
1012         if ((rxon1->flags == rxon2->flags) &&
1013             (rxon1->filter_flags == rxon2->filter_flags) &&
1014             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1015             (rxon1->ofdm_ht_single_stream_basic_rates ==
1016              rxon2->ofdm_ht_single_stream_basic_rates) &&
1017             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1018              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1019             (rxon1->rx_chain == rxon2->rx_chain) &&
1020             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1021                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1022                 return 0;
1023         }
1024
1025         rxon_assoc.flags = priv->staging_rxon.flags;
1026         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1027         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1028         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1029         rxon_assoc.reserved = 0;
1030         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1031             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1032         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1033             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1034         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1035
1036         rc = iwl4965_send_cmd_sync(priv, &cmd);
1037         if (rc)
1038                 return rc;
1039
1040         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1041         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1042                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1043                 rc = -EIO;
1044         }
1045
1046         priv->alloc_rxb_skb--;
1047         dev_kfree_skb_any(cmd.meta.u.skb);
1048
1049         return rc;
1050 }
1051
1052 /**
1053  * iwl4965_commit_rxon - commit staging_rxon to hardware
1054  *
1055  * The RXON command in staging_rxon is committed to the hardware and
1056  * the active_rxon structure is updated with the new data.  This
1057  * function correctly transitions out of the RXON_ASSOC_MSK state if
1058  * a HW tune is required based on the RXON structure changes.
1059  */
1060 static int iwl4965_commit_rxon(struct iwl_priv *priv)
1061 {
1062         /* cast away the const for active_rxon in this function */
1063         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1064         DECLARE_MAC_BUF(mac);
1065         int rc = 0;
1066
1067         if (!iwl4965_is_alive(priv))
1068                 return -1;
1069
1070         /* always get timestamp with Rx frame */
1071         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1072
1073         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
1074         if (rc) {
1075                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1076                 return -EINVAL;
1077         }
1078
1079         /* If we don't need to send a full RXON, we can use
1080          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
1081          * and other flags for the current radio configuration. */
1082         if (!iwl4965_full_rxon_required(priv)) {
1083                 rc = iwl4965_send_rxon_assoc(priv);
1084                 if (rc) {
1085                         IWL_ERROR("Error setting RXON_ASSOC "
1086                                   "configuration (%d).\n", rc);
1087                         return rc;
1088                 }
1089
1090                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1091
1092                 return 0;
1093         }
1094
1095         /* station table will be cleared */
1096         priv->assoc_station_added = 0;
1097
1098 #ifdef CONFIG_IWL4965_SENSITIVITY
1099         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1100         if (!priv->error_recovering)
1101                 priv->start_calib = 0;
1102
1103         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1104 #endif /* CONFIG_IWL4965_SENSITIVITY */
1105
1106         /* If we are currently associated and the new config requires
1107          * an RXON_ASSOC and the new config wants the associated mask enabled,
1108          * we must clear the associated from the active configuration
1109          * before we apply the new config */
1110         if (iwl4965_is_associated(priv) &&
1111             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1112                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1113                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1114
1115                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1116                                       sizeof(struct iwl4965_rxon_cmd),
1117                                       &priv->active_rxon);
1118
1119                 /* If the mask clearing failed then we set
1120                  * active_rxon back to what it was previously */
1121                 if (rc) {
1122                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1123                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1124                                   "configuration (%d).\n", rc);
1125                         return rc;
1126                 }
1127         }
1128
1129         IWL_DEBUG_INFO("Sending RXON\n"
1130                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1131                        "* channel = %d\n"
1132                        "* bssid = %s\n",
1133                        ((priv->staging_rxon.filter_flags &
1134                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1135                        le16_to_cpu(priv->staging_rxon.channel),
1136                        print_mac(mac, priv->staging_rxon.bssid_addr));
1137
1138         iwl4965_set_rxon_hwcrypto(priv, priv->cfg->mod_params->hw_crypto);
1139         /* Apply the new configuration */
1140         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1141                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
1142         if (rc) {
1143                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1144                 return rc;
1145         }
1146
1147         iwlcore_clear_stations_table(priv);
1148
1149 #ifdef CONFIG_IWL4965_SENSITIVITY
1150         if (!priv->error_recovering)
1151                 priv->start_calib = 0;
1152
1153         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1154         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1155 #endif /* CONFIG_IWL4965_SENSITIVITY */
1156
1157         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1158
1159         /* If we issue a new RXON command which required a tune then we must
1160          * send a new TXPOWER command or we won't be able to Tx any frames */
1161         rc = iwl4965_hw_reg_send_txpower(priv);
1162         if (rc) {
1163                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1164                 return rc;
1165         }
1166
1167         /* Add the broadcast address so we can send broadcast frames */
1168         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
1169             IWL_INVALID_STATION) {
1170                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1171                 return -EIO;
1172         }
1173
1174         /* If we have set the ASSOC_MSK and we are in BSS mode then
1175          * add the IWL_AP_ID to the station rate table */
1176         if (iwl4965_is_associated(priv) &&
1177             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1178                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1179                     == IWL_INVALID_STATION) {
1180                         IWL_ERROR("Error adding AP address for transmit.\n");
1181                         return -EIO;
1182                 }
1183                 priv->assoc_station_added = 1;
1184         }
1185
1186         return 0;
1187 }
1188
1189 static int iwl4965_send_bt_config(struct iwl_priv *priv)
1190 {
1191         struct iwl4965_bt_cmd bt_cmd = {
1192                 .flags = 3,
1193                 .lead_time = 0xAA,
1194                 .max_kill = 1,
1195                 .kill_ack_mask = 0,
1196                 .kill_cts_mask = 0,
1197         };
1198
1199         return iwl4965_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1200                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
1201 }
1202
1203 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
1204 {
1205         int rc = 0;
1206         struct iwl4965_rx_packet *res;
1207         struct iwl4965_host_cmd cmd = {
1208                 .id = REPLY_SCAN_ABORT_CMD,
1209                 .meta.flags = CMD_WANT_SKB,
1210         };
1211
1212         /* If there isn't a scan actively going on in the hardware
1213          * then we are in between scan bands and not actually
1214          * actively scanning, so don't send the abort command */
1215         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1216                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1217                 return 0;
1218         }
1219
1220         rc = iwl4965_send_cmd_sync(priv, &cmd);
1221         if (rc) {
1222                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1223                 return rc;
1224         }
1225
1226         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1227         if (res->u.status != CAN_ABORT_STATUS) {
1228                 /* The scan abort will return 1 for success or
1229                  * 2 for "failure".  A failure condition can be
1230                  * due to simply not being in an active scan which
1231                  * can occur if we send the scan abort before we
1232                  * the microcode has notified us that a scan is
1233                  * completed. */
1234                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1235                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1236                 clear_bit(STATUS_SCAN_HW, &priv->status);
1237         }
1238
1239         dev_kfree_skb_any(cmd.meta.u.skb);
1240
1241         return rc;
1242 }
1243
1244 static int iwl4965_card_state_sync_callback(struct iwl_priv *priv,
1245                                         struct iwl4965_cmd *cmd,
1246                                         struct sk_buff *skb)
1247 {
1248         return 1;
1249 }
1250
1251 /*
1252  * CARD_STATE_CMD
1253  *
1254  * Use: Sets the device's internal card state to enable, disable, or halt
1255  *
1256  * When in the 'enable' state the card operates as normal.
1257  * When in the 'disable' state, the card enters into a low power mode.
1258  * When in the 'halt' state, the card is shut down and must be fully
1259  * restarted to come back on.
1260  */
1261 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1262 {
1263         struct iwl4965_host_cmd cmd = {
1264                 .id = REPLY_CARD_STATE_CMD,
1265                 .len = sizeof(u32),
1266                 .data = &flags,
1267                 .meta.flags = meta_flag,
1268         };
1269
1270         if (meta_flag & CMD_ASYNC)
1271                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1272
1273         return iwl4965_send_cmd(priv, &cmd);
1274 }
1275
1276 static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
1277                                      struct iwl4965_cmd *cmd, struct sk_buff *skb)
1278 {
1279         struct iwl4965_rx_packet *res = NULL;
1280
1281         if (!skb) {
1282                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1283                 return 1;
1284         }
1285
1286         res = (struct iwl4965_rx_packet *)skb->data;
1287         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1288                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1289                           res->hdr.flags);
1290                 return 1;
1291         }
1292
1293         switch (res->u.add_sta.status) {
1294         case ADD_STA_SUCCESS_MSK:
1295                 break;
1296         default:
1297                 break;
1298         }
1299
1300         /* We didn't cache the SKB; let the caller free it */
1301         return 1;
1302 }
1303
1304 int iwl4965_send_add_station(struct iwl_priv *priv,
1305                          struct iwl4965_addsta_cmd *sta, u8 flags)
1306 {
1307         struct iwl4965_rx_packet *res = NULL;
1308         int rc = 0;
1309         struct iwl4965_host_cmd cmd = {
1310                 .id = REPLY_ADD_STA,
1311                 .len = sizeof(struct iwl4965_addsta_cmd),
1312                 .meta.flags = flags,
1313                 .data = sta,
1314         };
1315
1316         if (flags & CMD_ASYNC)
1317                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1318         else
1319                 cmd.meta.flags |= CMD_WANT_SKB;
1320
1321         rc = iwl4965_send_cmd(priv, &cmd);
1322
1323         if (rc || (flags & CMD_ASYNC))
1324                 return rc;
1325
1326         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1327         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1328                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1329                           res->hdr.flags);
1330                 rc = -EIO;
1331         }
1332
1333         if (rc == 0) {
1334                 switch (res->u.add_sta.status) {
1335                 case ADD_STA_SUCCESS_MSK:
1336                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1337                         break;
1338                 default:
1339                         rc = -EIO;
1340                         IWL_WARNING("REPLY_ADD_STA failed\n");
1341                         break;
1342                 }
1343         }
1344
1345         priv->alloc_rxb_skb--;
1346         dev_kfree_skb_any(cmd.meta.u.skb);
1347
1348         return rc;
1349 }
1350
1351 static int iwl4965_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
1352                                    struct ieee80211_key_conf *keyconf,
1353                                    u8 sta_id)
1354 {
1355         unsigned long flags;
1356         __le16 key_flags = 0;
1357
1358         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
1359         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1360
1361         if (sta_id == priv->hw_setting.bcast_sta_id)
1362                 key_flags |= STA_KEY_MULTICAST_MSK;
1363
1364         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1365         keyconf->hw_key_idx = keyconf->keyidx;
1366
1367         key_flags &= ~STA_KEY_FLG_INVALID;
1368
1369         spin_lock_irqsave(&priv->sta_lock, flags);
1370         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1371         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1372
1373         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1374                keyconf->keylen);
1375
1376         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1377                keyconf->keylen);
1378
1379         priv->stations[sta_id].sta.key.key_offset
1380                         = (sta_id % STA_KEY_MAX_NUM);/*FIXME*/
1381         priv->stations[sta_id].sta.key.key_flags = key_flags;
1382         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1383         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1384
1385         spin_unlock_irqrestore(&priv->sta_lock, flags);
1386
1387         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1388         return iwl4965_send_add_station(priv,
1389                                 &priv->stations[sta_id].sta, CMD_ASYNC);
1390 }
1391
1392 static int iwl4965_set_tkip_dynamic_key_info(struct iwl_priv *priv,
1393                                    struct ieee80211_key_conf *keyconf,
1394                                    u8 sta_id)
1395 {
1396         unsigned long flags;
1397         int ret = 0;
1398
1399         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1400         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1401         keyconf->hw_key_idx = keyconf->keyidx;
1402
1403         spin_lock_irqsave(&priv->sta_lock, flags);
1404
1405         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1406         priv->stations[sta_id].keyinfo.conf = keyconf;
1407         priv->stations[sta_id].keyinfo.keylen = 16;
1408
1409         /* This copy is acutally not needed: we get the key with each TX */
1410         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1411
1412         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1413
1414         spin_unlock_irqrestore(&priv->sta_lock, flags);
1415
1416         return ret;
1417 }
1418
1419 static int iwl4965_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1420 {
1421         unsigned long flags;
1422
1423         spin_lock_irqsave(&priv->sta_lock, flags);
1424         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1425         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1426         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1427         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1428         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1429         spin_unlock_irqrestore(&priv->sta_lock, flags);
1430
1431         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1432         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1433         return 0;
1434 }
1435
1436 static int iwl4965_set_dynamic_key(struct iwl_priv *priv,
1437                                 struct ieee80211_key_conf *key, u8 sta_id)
1438 {
1439         int ret;
1440
1441         switch (key->alg) {
1442         case ALG_CCMP:
1443                 ret = iwl4965_set_ccmp_dynamic_key_info(priv, key, sta_id);
1444                 break;
1445         case ALG_TKIP:
1446                 ret = iwl4965_set_tkip_dynamic_key_info(priv, key, sta_id);
1447                 break;
1448         case ALG_WEP:
1449                 ret = -EOPNOTSUPP;
1450                 break;
1451         default:
1452                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
1453                 ret = -EINVAL;
1454         }
1455
1456         return ret;
1457 }
1458
1459 static int iwl4965_remove_static_key(struct iwl_priv *priv)
1460 {
1461         int ret = -EOPNOTSUPP;
1462
1463         return ret;
1464 }
1465
1466 static int iwl4965_set_static_key(struct iwl_priv *priv,
1467                                 struct ieee80211_key_conf *key)
1468 {
1469         if (key->alg == ALG_WEP)
1470                 return -EOPNOTSUPP;
1471
1472         IWL_ERROR("Static key invalid: alg %d\n", key->alg);
1473         return -EINVAL;
1474 }
1475
1476 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1477 {
1478         struct list_head *element;
1479
1480         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1481                        priv->frames_count);
1482
1483         while (!list_empty(&priv->free_frames)) {
1484                 element = priv->free_frames.next;
1485                 list_del(element);
1486                 kfree(list_entry(element, struct iwl4965_frame, list));
1487                 priv->frames_count--;
1488         }
1489
1490         if (priv->frames_count) {
1491                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1492                             priv->frames_count);
1493                 priv->frames_count = 0;
1494         }
1495 }
1496
1497 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1498 {
1499         struct iwl4965_frame *frame;
1500         struct list_head *element;
1501         if (list_empty(&priv->free_frames)) {
1502                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1503                 if (!frame) {
1504                         IWL_ERROR("Could not allocate frame!\n");
1505                         return NULL;
1506                 }
1507
1508                 priv->frames_count++;
1509                 return frame;
1510         }
1511
1512         element = priv->free_frames.next;
1513         list_del(element);
1514         return list_entry(element, struct iwl4965_frame, list);
1515 }
1516
1517 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1518 {
1519         memset(frame, 0, sizeof(*frame));
1520         list_add(&frame->list, &priv->free_frames);
1521 }
1522
1523 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1524                                 struct ieee80211_hdr *hdr,
1525                                 const u8 *dest, int left)
1526 {
1527
1528         if (!iwl4965_is_associated(priv) || !priv->ibss_beacon ||
1529             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1530              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1531                 return 0;
1532
1533         if (priv->ibss_beacon->len > left)
1534                 return 0;
1535
1536         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1537
1538         return priv->ibss_beacon->len;
1539 }
1540
1541 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1542 {
1543         u8 i;
1544
1545         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1546              i = iwl4965_rates[i].next_ieee) {
1547                 if (rate_mask & (1 << i))
1548                         return iwl4965_rates[i].plcp;
1549         }
1550
1551         return IWL_RATE_INVALID;
1552 }
1553
1554 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1555 {
1556         struct iwl4965_frame *frame;
1557         unsigned int frame_size;
1558         int rc;
1559         u8 rate;
1560
1561         frame = iwl4965_get_free_frame(priv);
1562
1563         if (!frame) {
1564                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1565                           "command.\n");
1566                 return -ENOMEM;
1567         }
1568
1569         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1570                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1571                                                 0xFF0);
1572                 if (rate == IWL_INVALID_RATE)
1573                         rate = IWL_RATE_6M_PLCP;
1574         } else {
1575                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1576                 if (rate == IWL_INVALID_RATE)
1577                         rate = IWL_RATE_1M_PLCP;
1578         }
1579
1580         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1581
1582         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1583                               &frame->u.cmd[0]);
1584
1585         iwl4965_free_frame(priv, frame);
1586
1587         return rc;
1588 }
1589
1590 /******************************************************************************
1591  *
1592  * Misc. internal state and helper functions
1593  *
1594  ******************************************************************************/
1595
1596 static void iwl4965_unset_hw_setting(struct iwl_priv *priv)
1597 {
1598         if (priv->hw_setting.shared_virt)
1599                 pci_free_consistent(priv->pci_dev,
1600                                     sizeof(struct iwl4965_shared),
1601                                     priv->hw_setting.shared_virt,
1602                                     priv->hw_setting.shared_phys);
1603 }
1604
1605 /**
1606  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1607  *
1608  * return : set the bit for each supported rate insert in ie
1609  */
1610 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1611                                     u16 basic_rate, int *left)
1612 {
1613         u16 ret_rates = 0, bit;
1614         int i;
1615         u8 *cnt = ie;
1616         u8 *rates = ie + 1;
1617
1618         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1619                 if (bit & supported_rate) {
1620                         ret_rates |= bit;
1621                         rates[*cnt] = iwl4965_rates[i].ieee |
1622                                 ((bit & basic_rate) ? 0x80 : 0x00);
1623                         (*cnt)++;
1624                         (*left)--;
1625                         if ((*left <= 0) ||
1626                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1627                                 break;
1628                 }
1629         }
1630
1631         return ret_rates;
1632 }
1633
1634 /**
1635  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1636  */
1637 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1638                                   enum ieee80211_band band,
1639                                   struct ieee80211_mgmt *frame,
1640                                   int left, int is_direct)
1641 {
1642         int len = 0;
1643         u8 *pos = NULL;
1644         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1645 #ifdef CONFIG_IWL4965_HT
1646         const struct ieee80211_supported_band *sband =
1647                                                 iwl4965_get_hw_mode(priv, band);
1648 #endif /* CONFIG_IWL4965_HT */
1649
1650         /* Make sure there is enough space for the probe request,
1651          * two mandatory IEs and the data */
1652         left -= 24;
1653         if (left < 0)
1654                 return 0;
1655         len += 24;
1656
1657         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1658         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1659         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1660         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1661         frame->seq_ctrl = 0;
1662
1663         /* fill in our indirect SSID IE */
1664         /* ...next IE... */
1665
1666         left -= 2;
1667         if (left < 0)
1668                 return 0;
1669         len += 2;
1670         pos = &(frame->u.probe_req.variable[0]);
1671         *pos++ = WLAN_EID_SSID;
1672         *pos++ = 0;
1673
1674         /* fill in our direct SSID IE... */
1675         if (is_direct) {
1676                 /* ...next IE... */
1677                 left -= 2 + priv->essid_len;
1678                 if (left < 0)
1679                         return 0;
1680                 /* ... fill it in... */
1681                 *pos++ = WLAN_EID_SSID;
1682                 *pos++ = priv->essid_len;
1683                 memcpy(pos, priv->essid, priv->essid_len);
1684                 pos += priv->essid_len;
1685                 len += 2 + priv->essid_len;
1686         }
1687
1688         /* fill in supported rate */
1689         /* ...next IE... */
1690         left -= 2;
1691         if (left < 0)
1692                 return 0;
1693
1694         /* ... fill it in... */
1695         *pos++ = WLAN_EID_SUPP_RATES;
1696         *pos = 0;
1697
1698         /* exclude 60M rate */
1699         active_rates = priv->rates_mask;
1700         active_rates &= ~IWL_RATE_60M_MASK;
1701
1702         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1703
1704         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1705         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1706                         active_rate_basic, &left);
1707         active_rates &= ~ret_rates;
1708
1709         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1710                                  active_rate_basic, &left);
1711         active_rates &= ~ret_rates;
1712
1713         len += 2 + *pos;
1714         pos += (*pos) + 1;
1715         if (active_rates == 0)
1716                 goto fill_end;
1717
1718         /* fill in supported extended rate */
1719         /* ...next IE... */
1720         left -= 2;
1721         if (left < 0)
1722                 return 0;
1723         /* ... fill it in... */
1724         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1725         *pos = 0;
1726         iwl4965_supported_rate_to_ie(pos, active_rates,
1727                                  active_rate_basic, &left);
1728         if (*pos > 0)
1729                 len += 2 + *pos;
1730
1731 #ifdef CONFIG_IWL4965_HT
1732         if (sband && sband->ht_info.ht_supported) {
1733                 struct ieee80211_ht_cap *ht_cap;
1734                 pos += (*pos) + 1;
1735                 *pos++ = WLAN_EID_HT_CAPABILITY;
1736                 *pos++ = sizeof(struct ieee80211_ht_cap);
1737                 ht_cap = (struct ieee80211_ht_cap *)pos;
1738                 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1739                 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1740                 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1741                                             IEEE80211_HT_CAP_AMPDU_FACTOR) |
1742                                             ((sband->ht_info.ampdu_density << 2) &
1743                                             IEEE80211_HT_CAP_AMPDU_DENSITY);
1744                 len += 2 + sizeof(struct ieee80211_ht_cap);
1745         }
1746 #endif  /*CONFIG_IWL4965_HT */
1747
1748  fill_end:
1749         return (u16)len;
1750 }
1751
1752 /*
1753  * QoS  support
1754 */
1755 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1756                                        struct iwl4965_qosparam_cmd *qos)
1757 {
1758
1759         return iwl4965_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1760                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1761 }
1762
1763 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1764 {
1765         unsigned long flags;
1766
1767         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1768                 return;
1769
1770         if (!priv->qos_data.qos_enable)
1771                 return;
1772
1773         spin_lock_irqsave(&priv->lock, flags);
1774         priv->qos_data.def_qos_parm.qos_flags = 0;
1775
1776         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1777             !priv->qos_data.qos_cap.q_AP.txop_request)
1778                 priv->qos_data.def_qos_parm.qos_flags |=
1779                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1780         if (priv->qos_data.qos_active)
1781                 priv->qos_data.def_qos_parm.qos_flags |=
1782                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1783
1784 #ifdef CONFIG_IWL4965_HT
1785         if (priv->current_ht_config.is_ht)
1786                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1787 #endif /* CONFIG_IWL4965_HT */
1788
1789         spin_unlock_irqrestore(&priv->lock, flags);
1790
1791         if (force || iwl4965_is_associated(priv)) {
1792                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1793                                 priv->qos_data.qos_active,
1794                                 priv->qos_data.def_qos_parm.qos_flags);
1795
1796                 iwl4965_send_qos_params_command(priv,
1797                                 &(priv->qos_data.def_qos_parm));
1798         }
1799 }
1800
1801 /*
1802  * Power management (not Tx power!) functions
1803  */
1804 #define MSEC_TO_USEC 1024
1805
1806 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1807 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1808 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1809 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1810                                      __constant_cpu_to_le32(X1), \
1811                                      __constant_cpu_to_le32(X2), \
1812                                      __constant_cpu_to_le32(X3), \
1813                                      __constant_cpu_to_le32(X4)}
1814
1815
1816 /* default power management (not Tx power) table values */
1817 /* for tim  0-10 */
1818 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1819         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1820         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1821         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1822         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1823         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1824         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1825 };
1826
1827 /* for tim > 10 */
1828 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1829         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1830         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1831                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1832         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1833                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1834         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1835                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1836         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1837         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1838                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1839 };
1840
1841 int iwl4965_power_init_handle(struct iwl_priv *priv)
1842 {
1843         int rc = 0, i;
1844         struct iwl4965_power_mgr *pow_data;
1845         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1846         u16 pci_pm;
1847
1848         IWL_DEBUG_POWER("Initialize power \n");
1849
1850         pow_data = &(priv->power_data);
1851
1852         memset(pow_data, 0, sizeof(*pow_data));
1853
1854         pow_data->active_index = IWL_POWER_RANGE_0;
1855         pow_data->dtim_val = 0xffff;
1856
1857         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1858         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1859
1860         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1861         if (rc != 0)
1862                 return 0;
1863         else {
1864                 struct iwl4965_powertable_cmd *cmd;
1865
1866                 IWL_DEBUG_POWER("adjust power command flags\n");
1867
1868                 for (i = 0; i < IWL_POWER_AC; i++) {
1869                         cmd = &pow_data->pwr_range_0[i].cmd;
1870
1871                         if (pci_pm & 0x1)
1872                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1873                         else
1874                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1875                 }
1876         }
1877         return rc;
1878 }
1879
1880 static int iwl4965_update_power_cmd(struct iwl_priv *priv,
1881                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
1882 {
1883         int rc = 0, i;
1884         u8 skip;
1885         u32 max_sleep = 0;
1886         struct iwl4965_power_vec_entry *range;
1887         u8 period = 0;
1888         struct iwl4965_power_mgr *pow_data;
1889
1890         if (mode > IWL_POWER_INDEX_5) {
1891                 IWL_DEBUG_POWER("Error invalid power mode \n");
1892                 return -1;
1893         }
1894         pow_data = &(priv->power_data);
1895
1896         if (pow_data->active_index == IWL_POWER_RANGE_0)
1897                 range = &pow_data->pwr_range_0[0];
1898         else
1899                 range = &pow_data->pwr_range_1[1];
1900
1901         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1902
1903 #ifdef IWL_MAC80211_DISABLE
1904         if (priv->assoc_network != NULL) {
1905                 unsigned long flags;
1906
1907                 period = priv->assoc_network->tim.tim_period;
1908         }
1909 #endif  /*IWL_MAC80211_DISABLE */
1910         skip = range[mode].no_dtim;
1911
1912         if (period == 0) {
1913                 period = 1;
1914                 skip = 0;
1915         }
1916
1917         if (skip == 0) {
1918                 max_sleep = period;
1919                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1920         } else {
1921                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1922                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1923                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1924         }
1925
1926         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1927                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1928                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1929         }
1930
1931         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1932         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1933         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1934         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1935                         le32_to_cpu(cmd->sleep_interval[0]),
1936                         le32_to_cpu(cmd->sleep_interval[1]),
1937                         le32_to_cpu(cmd->sleep_interval[2]),
1938                         le32_to_cpu(cmd->sleep_interval[3]),
1939                         le32_to_cpu(cmd->sleep_interval[4]));
1940
1941         return rc;
1942 }
1943
1944 static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
1945 {
1946         u32 uninitialized_var(final_mode);
1947         int rc;
1948         struct iwl4965_powertable_cmd cmd;
1949
1950         /* If on battery, set to 3,
1951          * if plugged into AC power, set to CAM ("continuously aware mode"),
1952          * else user level */
1953         switch (mode) {
1954         case IWL_POWER_BATTERY:
1955                 final_mode = IWL_POWER_INDEX_3;
1956                 break;
1957         case IWL_POWER_AC:
1958                 final_mode = IWL_POWER_MODE_CAM;
1959                 break;
1960         default:
1961                 final_mode = mode;
1962                 break;
1963         }
1964
1965         cmd.keep_alive_beacons = 0;
1966
1967         iwl4965_update_power_cmd(priv, &cmd, final_mode);
1968
1969         rc = iwl4965_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1970
1971         if (final_mode == IWL_POWER_MODE_CAM)
1972                 clear_bit(STATUS_POWER_PMI, &priv->status);
1973         else
1974                 set_bit(STATUS_POWER_PMI, &priv->status);
1975
1976         return rc;
1977 }
1978
1979 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1980 {
1981         /* Filter incoming packets to determine if they are targeted toward
1982          * this network, discarding packets coming from ourselves */
1983         switch (priv->iw_mode) {
1984         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1985                 /* packets from our adapter are dropped (echo) */
1986                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1987                         return 0;
1988                 /* {broad,multi}cast packets to our IBSS go through */
1989                 if (is_multicast_ether_addr(header->addr1))
1990                         return !compare_ether_addr(header->addr3, priv->bssid);
1991                 /* packets to our adapter go through */
1992                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1993         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1994                 /* packets from our adapter are dropped (echo) */
1995                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1996                         return 0;
1997                 /* {broad,multi}cast packets to our BSS go through */
1998                 if (is_multicast_ether_addr(header->addr1))
1999                         return !compare_ether_addr(header->addr2, priv->bssid);
2000                 /* packets to our adapter go through */
2001                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2002         }
2003
2004         return 1;
2005 }
2006
2007 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2008
2009 static const char *iwl4965_get_tx_fail_reason(u32 status)
2010 {
2011         switch (status & TX_STATUS_MSK) {
2012         case TX_STATUS_SUCCESS:
2013                 return "SUCCESS";
2014                 TX_STATUS_ENTRY(SHORT_LIMIT);
2015                 TX_STATUS_ENTRY(LONG_LIMIT);
2016                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2017                 TX_STATUS_ENTRY(MGMNT_ABORT);
2018                 TX_STATUS_ENTRY(NEXT_FRAG);
2019                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2020                 TX_STATUS_ENTRY(DEST_PS);
2021                 TX_STATUS_ENTRY(ABORTED);
2022                 TX_STATUS_ENTRY(BT_RETRY);
2023                 TX_STATUS_ENTRY(STA_INVALID);
2024                 TX_STATUS_ENTRY(FRAG_DROPPED);
2025                 TX_STATUS_ENTRY(TID_DISABLE);
2026                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2027                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2028                 TX_STATUS_ENTRY(TX_LOCKED);
2029                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2030         }
2031
2032         return "UNKNOWN";
2033 }
2034
2035 /**
2036  * iwl4965_scan_cancel - Cancel any currently executing HW scan
2037  *
2038  * NOTE: priv->mutex is not required before calling this function
2039  */
2040 static int iwl4965_scan_cancel(struct iwl_priv *priv)
2041 {
2042         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2043                 clear_bit(STATUS_SCANNING, &priv->status);
2044                 return 0;
2045         }
2046
2047         if (test_bit(STATUS_SCANNING, &priv->status)) {
2048                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2049                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2050                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2051                         queue_work(priv->workqueue, &priv->abort_scan);
2052
2053                 } else
2054                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2055
2056                 return test_bit(STATUS_SCANNING, &priv->status);
2057         }
2058
2059         return 0;
2060 }
2061
2062 /**
2063  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
2064  * @ms: amount of time to wait (in milliseconds) for scan to abort
2065  *
2066  * NOTE: priv->mutex must be held before calling this function
2067  */
2068 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2069 {
2070         unsigned long now = jiffies;
2071         int ret;
2072
2073         ret = iwl4965_scan_cancel(priv);
2074         if (ret && ms) {
2075                 mutex_unlock(&priv->mutex);
2076                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2077                                 test_bit(STATUS_SCANNING, &priv->status))
2078                         msleep(1);
2079                 mutex_lock(&priv->mutex);
2080
2081                 return test_bit(STATUS_SCANNING, &priv->status);
2082         }
2083
2084         return ret;
2085 }
2086
2087 static void iwl4965_sequence_reset(struct iwl_priv *priv)
2088 {
2089         /* Reset ieee stats */
2090
2091         /* We don't reset the net_device_stats (ieee->stats) on
2092          * re-association */
2093
2094         priv->last_seq_num = -1;
2095         priv->last_frag_num = -1;
2096         priv->last_packet_time = 0;
2097
2098         iwl4965_scan_cancel(priv);
2099 }
2100
2101 #define MAX_UCODE_BEACON_INTERVAL       4096
2102 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2103
2104 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
2105 {
2106         u16 new_val = 0;
2107         u16 beacon_factor = 0;
2108
2109         beacon_factor =
2110             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2111                 / MAX_UCODE_BEACON_INTERVAL;
2112         new_val = beacon_val / beacon_factor;
2113
2114         return cpu_to_le16(new_val);
2115 }
2116
2117 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
2118 {
2119         u64 interval_tm_unit;
2120         u64 tsf, result;
2121         unsigned long flags;
2122         struct ieee80211_conf *conf = NULL;
2123         u16 beacon_int = 0;
2124
2125         conf = ieee80211_get_hw_conf(priv->hw);
2126
2127         spin_lock_irqsave(&priv->lock, flags);
2128         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2129         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2130
2131         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2132
2133         tsf = priv->timestamp1;
2134         tsf = ((tsf << 32) | priv->timestamp0);
2135
2136         beacon_int = priv->beacon_int;
2137         spin_unlock_irqrestore(&priv->lock, flags);
2138
2139         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2140                 if (beacon_int == 0) {
2141                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2142                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2143                 } else {
2144                         priv->rxon_timing.beacon_interval =
2145                                 cpu_to_le16(beacon_int);
2146                         priv->rxon_timing.beacon_interval =
2147                             iwl4965_adjust_beacon_interval(
2148                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2149                 }
2150
2151                 priv->rxon_timing.atim_window = 0;
2152         } else {
2153                 priv->rxon_timing.beacon_interval =
2154                         iwl4965_adjust_beacon_interval(conf->beacon_int);
2155                 /* TODO: we need to get atim_window from upper stack
2156                  * for now we set to 0 */
2157                 priv->rxon_timing.atim_window = 0;
2158         }
2159
2160         interval_tm_unit =
2161                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2162         result = do_div(tsf, interval_tm_unit);
2163         priv->rxon_timing.beacon_init_val =
2164             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2165
2166         IWL_DEBUG_ASSOC
2167             ("beacon interval %d beacon timer %d beacon tim %d\n",
2168                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2169                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2170                 le16_to_cpu(priv->rxon_timing.atim_window));
2171 }
2172
2173 static int iwl4965_scan_initiate(struct iwl_priv *priv)
2174 {
2175         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2176                 IWL_ERROR("APs don't scan.\n");
2177                 return 0;
2178         }
2179
2180         if (!iwl4965_is_ready_rf(priv)) {
2181                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2182                 return -EIO;
2183         }
2184
2185         if (test_bit(STATUS_SCANNING, &priv->status)) {
2186                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2187                 return -EAGAIN;
2188         }
2189
2190         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2191                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2192                                "Queuing.\n");
2193                 return -EAGAIN;
2194         }
2195
2196         IWL_DEBUG_INFO("Starting scan...\n");
2197         priv->scan_bands = 2;
2198         set_bit(STATUS_SCANNING, &priv->status);
2199         priv->scan_start = jiffies;
2200         priv->scan_pass_start = priv->scan_start;
2201
2202         queue_work(priv->workqueue, &priv->request_scan);
2203
2204         return 0;
2205 }
2206
2207
2208 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
2209                                           enum ieee80211_band band)
2210 {
2211         if (band == IEEE80211_BAND_5GHZ) {
2212                 priv->staging_rxon.flags &=
2213                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2214                       | RXON_FLG_CCK_MSK);
2215                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2216         } else {
2217                 /* Copied from iwl4965_bg_post_associate() */
2218                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2219                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2220                 else
2221                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2222
2223                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2224                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2225
2226                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2227                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2228                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2229         }
2230 }
2231
2232 /*
2233  * initialize rxon structure with default values from eeprom
2234  */
2235 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
2236 {
2237         const struct iwl_channel_info *ch_info;
2238
2239         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2240
2241         switch (priv->iw_mode) {
2242         case IEEE80211_IF_TYPE_AP:
2243                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2244                 break;
2245
2246         case IEEE80211_IF_TYPE_STA:
2247                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2248                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2249                 break;
2250
2251         case IEEE80211_IF_TYPE_IBSS:
2252                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2253                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2254                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2255                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2256                 break;
2257
2258         case IEEE80211_IF_TYPE_MNTR:
2259                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2260                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2261                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2262                 break;
2263         }
2264
2265 #if 0
2266         /* TODO:  Figure out when short_preamble would be set and cache from
2267          * that */
2268         if (!hw_to_local(priv->hw)->short_preamble)
2269                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2270         else
2271                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2272 #endif
2273
2274         ch_info = iwl4965_get_channel_info(priv, priv->band,
2275                                        le16_to_cpu(priv->staging_rxon.channel));
2276
2277         if (!ch_info)
2278                 ch_info = &priv->channel_info[0];
2279
2280         /*
2281          * in some case A channels are all non IBSS
2282          * in this case force B/G channel
2283          */
2284         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2285             !(is_channel_ibss(ch_info)))
2286                 ch_info = &priv->channel_info[0];
2287
2288         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2289         priv->band = ch_info->band;
2290
2291         iwl4965_set_flags_for_phymode(priv, priv->band);
2292
2293         priv->staging_rxon.ofdm_basic_rates =
2294             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2295         priv->staging_rxon.cck_basic_rates =
2296             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2297
2298         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2299                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2300         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2301         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2302         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2303         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2304         iwl4965_set_rxon_chain(priv);
2305 }
2306
2307 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
2308 {
2309         if (mode == IEEE80211_IF_TYPE_IBSS) {
2310                 const struct iwl_channel_info *ch_info;
2311
2312                 ch_info = iwl4965_get_channel_info(priv,
2313                         priv->band,
2314                         le16_to_cpu(priv->staging_rxon.channel));
2315
2316                 if (!ch_info || !is_channel_ibss(ch_info)) {
2317                         IWL_ERROR("channel %d not IBSS channel\n",
2318                                   le16_to_cpu(priv->staging_rxon.channel));
2319                         return -EINVAL;
2320                 }
2321         }
2322
2323         priv->iw_mode = mode;
2324
2325         iwl4965_connection_init_rx_config(priv);
2326         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2327
2328         iwlcore_clear_stations_table(priv);
2329
2330         /* dont commit rxon if rf-kill is on*/
2331         if (!iwl4965_is_ready_rf(priv))
2332                 return -EAGAIN;
2333
2334         cancel_delayed_work(&priv->scan_check);
2335         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2336                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2337                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2338                 return -EAGAIN;
2339         }
2340
2341         iwl4965_commit_rxon(priv);
2342
2343         return 0;
2344 }
2345
2346 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2347                                       struct ieee80211_tx_control *ctl,
2348                                       struct iwl4965_cmd *cmd,
2349                                       struct sk_buff *skb_frag,
2350                                       int sta_id)
2351 {
2352         struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
2353
2354         switch (keyinfo->alg) {
2355         case ALG_CCMP:
2356                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2357                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2358                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2359                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
2360                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2361                 break;
2362
2363         case ALG_TKIP:
2364                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2365                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
2366                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
2367                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
2368                 break;
2369
2370         case ALG_WEP:
2371                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2372                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2373
2374                 if (keyinfo->keylen == 13)
2375                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2376
2377                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2378
2379                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2380                              "with key %d\n", ctl->key_idx);
2381                 break;
2382
2383         default:
2384                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2385                 break;
2386         }
2387 }
2388
2389 /*
2390  * handle build REPLY_TX command notification.
2391  */
2392 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
2393                                   struct iwl4965_cmd *cmd,
2394                                   struct ieee80211_tx_control *ctrl,
2395                                   struct ieee80211_hdr *hdr,
2396                                   int is_unicast, u8 std_id)
2397 {
2398         __le16 *qc;
2399         u16 fc = le16_to_cpu(hdr->frame_control);
2400         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2401
2402         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2403         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2404                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2405                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2406                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2407                 if (ieee80211_is_probe_response(fc) &&
2408                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2409                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2410         } else {
2411                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2412                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2413         }
2414
2415         if (ieee80211_is_back_request(fc))
2416                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2417
2418
2419         cmd->cmd.tx.sta_id = std_id;
2420         if (ieee80211_get_morefrag(hdr))
2421                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2422
2423         qc = ieee80211_get_qos_ctrl(hdr);
2424         if (qc) {
2425                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2426                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2427         } else
2428                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2429
2430         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2431                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2432                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2433         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2434                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2435                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2436         }
2437
2438         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2439                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2440
2441         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2442         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2443                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2444                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2445                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2446                 else
2447                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2448         } else
2449                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2450
2451         cmd->cmd.tx.driver_txop = 0;
2452         cmd->cmd.tx.tx_flags = tx_flags;
2453         cmd->cmd.tx.next_frame_len = 0;
2454 }
2455 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2456 {
2457         /* 0 - mgmt, 1 - cnt, 2 - data */
2458         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2459         priv->tx_stats[idx].cnt++;
2460         priv->tx_stats[idx].bytes += len;
2461 }
2462 /**
2463  * iwl4965_get_sta_id - Find station's index within station table
2464  *
2465  * If new IBSS station, create new entry in station table
2466  */
2467 static int iwl4965_get_sta_id(struct iwl_priv *priv,
2468                                 struct ieee80211_hdr *hdr)
2469 {
2470         int sta_id;
2471         u16 fc = le16_to_cpu(hdr->frame_control);
2472         DECLARE_MAC_BUF(mac);
2473
2474         /* If this frame is broadcast or management, use broadcast station id */
2475         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2476             is_multicast_ether_addr(hdr->addr1))
2477                 return priv->hw_setting.bcast_sta_id;
2478
2479         switch (priv->iw_mode) {
2480
2481         /* If we are a client station in a BSS network, use the special
2482          * AP station entry (that's the only station we communicate with) */
2483         case IEEE80211_IF_TYPE_STA:
2484                 return IWL_AP_ID;
2485
2486         /* If we are an AP, then find the station, or use BCAST */
2487         case IEEE80211_IF_TYPE_AP:
2488                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2489                 if (sta_id != IWL_INVALID_STATION)
2490                         return sta_id;
2491                 return priv->hw_setting.bcast_sta_id;
2492
2493         /* If this frame is going out to an IBSS network, find the station,
2494          * or create a new station table entry */
2495         case IEEE80211_IF_TYPE_IBSS:
2496                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2497                 if (sta_id != IWL_INVALID_STATION)
2498                         return sta_id;
2499
2500                 /* Create new station table entry */
2501                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2502                                                    0, CMD_ASYNC, NULL);
2503
2504                 if (sta_id != IWL_INVALID_STATION)
2505                         return sta_id;
2506
2507                 IWL_DEBUG_DROP("Station %s not in station map. "
2508                                "Defaulting to broadcast...\n",
2509                                print_mac(mac, hdr->addr1));
2510                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2511                 return priv->hw_setting.bcast_sta_id;
2512
2513         default:
2514                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2515                 return priv->hw_setting.bcast_sta_id;
2516         }
2517 }
2518
2519 /*
2520  * start REPLY_TX command process
2521  */
2522 static int iwl4965_tx_skb(struct iwl_priv *priv,
2523                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2524 {
2525         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2526         struct iwl4965_tfd_frame *tfd;
2527         u32 *control_flags;
2528         int txq_id = ctl->queue;
2529         struct iwl4965_tx_queue *txq = NULL;
2530         struct iwl4965_queue *q = NULL;
2531         dma_addr_t phys_addr;
2532         dma_addr_t txcmd_phys;
2533         dma_addr_t scratch_phys;
2534         struct iwl4965_cmd *out_cmd = NULL;
2535         u16 len, idx, len_org;
2536         u8 id, hdr_len, unicast;
2537         u8 sta_id;
2538         u16 seq_number = 0;
2539         u16 fc;
2540         __le16 *qc;
2541         u8 wait_write_ptr = 0;
2542         unsigned long flags;
2543         int rc;
2544
2545         spin_lock_irqsave(&priv->lock, flags);
2546         if (iwl4965_is_rfkill(priv)) {
2547                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2548                 goto drop_unlock;
2549         }
2550
2551         if (!priv->vif) {
2552                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2553                 goto drop_unlock;
2554         }
2555
2556         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2557                 IWL_ERROR("ERROR: No TX rate available.\n");
2558                 goto drop_unlock;
2559         }
2560
2561         unicast = !is_multicast_ether_addr(hdr->addr1);
2562         id = 0;
2563
2564         fc = le16_to_cpu(hdr->frame_control);
2565
2566 #ifdef CONFIG_IWLWIFI_DEBUG
2567         if (ieee80211_is_auth(fc))
2568                 IWL_DEBUG_TX("Sending AUTH frame\n");
2569         else if (ieee80211_is_assoc_request(fc))
2570                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2571         else if (ieee80211_is_reassoc_request(fc))
2572                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2573 #endif
2574
2575         /* drop all data frame if we are not associated */
2576         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2577            (!iwl4965_is_associated(priv) ||
2578             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2579             !priv->assoc_station_added)) {
2580                 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2581                 goto drop_unlock;
2582         }
2583
2584         spin_unlock_irqrestore(&priv->lock, flags);
2585
2586         hdr_len = ieee80211_get_hdrlen(fc);
2587
2588         /* Find (or create) index into station table for destination station */
2589         sta_id = iwl4965_get_sta_id(priv, hdr);
2590         if (sta_id == IWL_INVALID_STATION) {
2591                 DECLARE_MAC_BUF(mac);
2592
2593                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2594                                print_mac(mac, hdr->addr1));
2595                 goto drop;
2596         }
2597
2598         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2599
2600         qc = ieee80211_get_qos_ctrl(hdr);
2601         if (qc) {
2602                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2603                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2604                                 IEEE80211_SCTL_SEQ;
2605                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2606                         (hdr->seq_ctrl &
2607                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2608                 seq_number += 0x10;
2609 #ifdef CONFIG_IWL4965_HT
2610                 /* aggregation is on for this <sta,tid> */
2611                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2612                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2613                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2614 #endif /* CONFIG_IWL4965_HT */
2615         }
2616
2617         /* Descriptor for chosen Tx queue */
2618         txq = &priv->txq[txq_id];
2619         q = &txq->q;
2620
2621         spin_lock_irqsave(&priv->lock, flags);
2622
2623         /* Set up first empty TFD within this queue's circular TFD buffer */
2624         tfd = &txq->bd[q->write_ptr];
2625         memset(tfd, 0, sizeof(*tfd));
2626         control_flags = (u32 *) tfd;
2627         idx = get_cmd_index(q, q->write_ptr, 0);
2628
2629         /* Set up driver data for this TFD */
2630         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2631         txq->txb[q->write_ptr].skb[0] = skb;
2632         memcpy(&(txq->txb[q->write_ptr].status.control),
2633                ctl, sizeof(struct ieee80211_tx_control));
2634
2635         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2636         out_cmd = &txq->cmd[idx];
2637         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2638         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2639
2640         /*
2641          * Set up the Tx-command (not MAC!) header.
2642          * Store the chosen Tx queue and TFD index within the sequence field;
2643          * after Tx, uCode's Tx response will return this value so driver can
2644          * locate the frame within the tx queue and do post-tx processing.
2645          */
2646         out_cmd->hdr.cmd = REPLY_TX;
2647         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2648                                 INDEX_TO_SEQ(q->write_ptr)));
2649
2650         /* Copy MAC header from skb into command buffer */
2651         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2652
2653         /*
2654          * Use the first empty entry in this queue's command buffer array
2655          * to contain the Tx command and MAC header concatenated together
2656          * (payload data will be in another buffer).
2657          * Size of this varies, due to varying MAC header length.
2658          * If end is not dword aligned, we'll have 2 extra bytes at the end
2659          * of the MAC header (device reads on dword boundaries).
2660          * We'll tell device about this padding later.
2661          */
2662         len = priv->hw_setting.tx_cmd_len +
2663                 sizeof(struct iwl4965_cmd_header) + hdr_len;
2664
2665         len_org = len;
2666         len = (len + 3) & ~3;
2667
2668         if (len_org != len)
2669                 len_org = 1;
2670         else
2671                 len_org = 0;
2672
2673         /* Physical address of this Tx command's header (not MAC header!),
2674          * within command buffer array. */
2675         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl4965_cmd) * idx +
2676                      offsetof(struct iwl4965_cmd, hdr);
2677
2678         /* Add buffer containing Tx command and MAC(!) header to TFD's
2679          * first entry */
2680         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2681
2682         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2683                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2684
2685         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2686          * if any (802.11 null frames have no payload). */
2687         len = skb->len - hdr_len;
2688         if (len) {
2689                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2690                                            len, PCI_DMA_TODEVICE);
2691                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2692         }
2693
2694         /* Tell 4965 about any 2-byte padding after MAC header */
2695         if (len_org)
2696                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2697
2698         /* Total # bytes to be transmitted */
2699         len = (u16)skb->len;
2700         out_cmd->cmd.tx.len = cpu_to_le16(len);
2701
2702         /* TODO need this for burst mode later on */
2703         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2704
2705         /* set is_hcca to 0; it probably will never be implemented */
2706         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2707
2708         iwl_update_tx_stats(priv, fc, len);
2709
2710         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
2711                 offsetof(struct iwl4965_tx_cmd, scratch);
2712         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2713         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2714
2715         if (!ieee80211_get_morefrag(hdr)) {
2716                 txq->need_update = 1;
2717                 if (qc) {
2718                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2719                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2720                 }
2721         } else {
2722                 wait_write_ptr = 1;
2723                 txq->need_update = 0;
2724         }
2725
2726         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2727                            sizeof(out_cmd->cmd.tx));
2728
2729         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2730                            ieee80211_get_hdrlen(fc));
2731
2732         /* Set up entry for this TFD in Tx byte-count array */
2733         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2734
2735         /* Tell device the write index *just past* this latest filled TFD */
2736         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2737         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2738         spin_unlock_irqrestore(&priv->lock, flags);
2739
2740         if (rc)
2741                 return rc;
2742
2743         if ((iwl4965_queue_space(q) < q->high_mark)
2744             && priv->mac80211_registered) {
2745                 if (wait_write_ptr) {
2746                         spin_lock_irqsave(&priv->lock, flags);
2747                         txq->need_update = 1;
2748                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2749                         spin_unlock_irqrestore(&priv->lock, flags);
2750                 }
2751
2752                 ieee80211_stop_queue(priv->hw, ctl->queue);
2753         }
2754
2755         return 0;
2756
2757 drop_unlock:
2758         spin_unlock_irqrestore(&priv->lock, flags);
2759 drop:
2760         return -1;
2761 }
2762
2763 static void iwl4965_set_rate(struct iwl_priv *priv)
2764 {
2765         const struct ieee80211_supported_band *hw = NULL;
2766         struct ieee80211_rate *rate;
2767         int i;
2768
2769         hw = iwl4965_get_hw_mode(priv, priv->band);
2770         if (!hw) {
2771                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2772                 return;
2773         }
2774
2775         priv->active_rate = 0;
2776         priv->active_rate_basic = 0;
2777
2778         for (i = 0; i < hw->n_bitrates; i++) {
2779                 rate = &(hw->bitrates[i]);
2780                 if (rate->hw_value < IWL_RATE_COUNT)
2781                         priv->active_rate |= (1 << rate->hw_value);
2782         }
2783
2784         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2785                        priv->active_rate, priv->active_rate_basic);
2786
2787         /*
2788          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2789          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2790          * OFDM
2791          */
2792         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2793                 priv->staging_rxon.cck_basic_rates =
2794                     ((priv->active_rate_basic &
2795                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2796         else
2797                 priv->staging_rxon.cck_basic_rates =
2798                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2799
2800         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2801                 priv->staging_rxon.ofdm_basic_rates =
2802                     ((priv->active_rate_basic &
2803                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2804                       IWL_FIRST_OFDM_RATE) & 0xFF;
2805         else
2806                 priv->staging_rxon.ofdm_basic_rates =
2807                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2808 }
2809
2810 static void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2811 {
2812         unsigned long flags;
2813
2814         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2815                 return;
2816
2817         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2818                           disable_radio ? "OFF" : "ON");
2819
2820         if (disable_radio) {
2821                 iwl4965_scan_cancel(priv);
2822                 /* FIXME: This is a workaround for AP */
2823                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2824                         spin_lock_irqsave(&priv->lock, flags);
2825                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
2826                                     CSR_UCODE_SW_BIT_RFKILL);
2827                         spin_unlock_irqrestore(&priv->lock, flags);
2828                         iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2829                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2830                 }
2831                 return;
2832         }
2833
2834         spin_lock_irqsave(&priv->lock, flags);
2835         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2836
2837         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2838         spin_unlock_irqrestore(&priv->lock, flags);
2839
2840         /* wake up ucode */
2841         msleep(10);
2842
2843         spin_lock_irqsave(&priv->lock, flags);
2844         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
2845         if (!iwl4965_grab_nic_access(priv))
2846                 iwl4965_release_nic_access(priv);
2847         spin_unlock_irqrestore(&priv->lock, flags);
2848
2849         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2850                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2851                                   "disabled by HW switch\n");
2852                 return;
2853         }
2854
2855         queue_work(priv->workqueue, &priv->restart);
2856         return;
2857 }
2858
2859 void iwl4965_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2860                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2861 {
2862         u16 fc =
2863             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2864
2865         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2866                 return;
2867
2868         if (!(fc & IEEE80211_FCTL_PROTECTED))
2869                 return;
2870
2871         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2872         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2873         case RX_RES_STATUS_SEC_TYPE_TKIP:
2874                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2875                  * Decryption will be done in SW. */
2876                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2877                     RX_RES_STATUS_BAD_KEY_TTAK)
2878                         break;
2879
2880                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2881                     RX_RES_STATUS_BAD_ICV_MIC)
2882                         stats->flag |= RX_FLAG_MMIC_ERROR;
2883         case RX_RES_STATUS_SEC_TYPE_WEP:
2884         case RX_RES_STATUS_SEC_TYPE_CCMP:
2885                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2886                     RX_RES_STATUS_DECRYPT_OK) {
2887                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2888                         stats->flag |= RX_FLAG_DECRYPTED;
2889                 }
2890                 break;
2891
2892         default:
2893                 break;
2894         }
2895 }
2896
2897
2898 #define IWL_PACKET_RETRY_TIME HZ
2899
2900 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2901 {
2902         u16 sc = le16_to_cpu(header->seq_ctrl);
2903         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2904         u16 frag = sc & IEEE80211_SCTL_FRAG;
2905         u16 *last_seq, *last_frag;
2906         unsigned long *last_time;
2907
2908         switch (priv->iw_mode) {
2909         case IEEE80211_IF_TYPE_IBSS:{
2910                 struct list_head *p;
2911                 struct iwl4965_ibss_seq *entry = NULL;
2912                 u8 *mac = header->addr2;
2913                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2914
2915                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2916                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2917                         if (!compare_ether_addr(entry->mac, mac))
2918                                 break;
2919                 }
2920                 if (p == &priv->ibss_mac_hash[index]) {
2921                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2922                         if (!entry) {
2923                                 IWL_ERROR("Cannot malloc new mac entry\n");
2924                                 return 0;
2925                         }
2926                         memcpy(entry->mac, mac, ETH_ALEN);
2927                         entry->seq_num = seq;
2928                         entry->frag_num = frag;
2929                         entry->packet_time = jiffies;
2930                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2931                         return 0;
2932                 }
2933                 last_seq = &entry->seq_num;
2934                 last_frag = &entry->frag_num;
2935                 last_time = &entry->packet_time;
2936                 break;
2937         }
2938         case IEEE80211_IF_TYPE_STA:
2939                 last_seq = &priv->last_seq_num;
2940                 last_frag = &priv->last_frag_num;
2941                 last_time = &priv->last_packet_time;
2942                 break;
2943         default:
2944                 return 0;
2945         }
2946         if ((*last_seq == seq) &&
2947             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2948                 if (*last_frag == frag)
2949                         goto drop;
2950                 if (*last_frag + 1 != frag)
2951                         /* out-of-order fragment */
2952                         goto drop;
2953         } else
2954                 *last_seq = seq;
2955
2956         *last_frag = frag;
2957         *last_time = jiffies;
2958         return 0;
2959
2960  drop:
2961         return 1;
2962 }
2963
2964 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2965
2966 #include "iwl-spectrum.h"
2967
2968 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2969 #define BEACON_TIME_MASK_HIGH   0xFF000000
2970 #define TIME_UNIT               1024
2971
2972 /*
2973  * extended beacon time format
2974  * time in usec will be changed into a 32-bit value in 8:24 format
2975  * the high 1 byte is the beacon counts
2976  * the lower 3 bytes is the time in usec within one beacon interval
2977  */
2978
2979 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2980 {
2981         u32 quot;
2982         u32 rem;
2983         u32 interval = beacon_interval * 1024;
2984
2985         if (!interval || !usec)
2986                 return 0;
2987
2988         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2989         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2990
2991         return (quot << 24) + rem;
2992 }
2993
2994 /* base is usually what we get from ucode with each received frame,
2995  * the same as HW timer counter counting down
2996  */
2997
2998 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2999 {
3000         u32 base_low = base & BEACON_TIME_MASK_LOW;
3001         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3002         u32 interval = beacon_interval * TIME_UNIT;
3003         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3004             (addon & BEACON_TIME_MASK_HIGH);
3005
3006         if (base_low > addon_low)
3007                 res += base_low - addon_low;
3008         else if (base_low < addon_low) {
3009                 res += interval + base_low - addon_low;
3010                 res += (1 << 24);
3011         } else
3012                 res += (1 << 24);
3013
3014         return cpu_to_le32(res);
3015 }
3016
3017 static int iwl4965_get_measurement(struct iwl_priv *priv,
3018                                struct ieee80211_measurement_params *params,
3019                                u8 type)
3020 {
3021         struct iwl4965_spectrum_cmd spectrum;
3022         struct iwl4965_rx_packet *res;
3023         struct iwl4965_host_cmd cmd = {
3024                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3025                 .data = (void *)&spectrum,
3026                 .meta.flags = CMD_WANT_SKB,
3027         };
3028         u32 add_time = le64_to_cpu(params->start_time);
3029         int rc;
3030         int spectrum_resp_status;
3031         int duration = le16_to_cpu(params->duration);
3032
3033         if (iwl4965_is_associated(priv))
3034                 add_time =
3035                     iwl4965_usecs_to_beacons(
3036                         le64_to_cpu(params->start_time) - priv->last_tsf,
3037                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3038
3039         memset(&spectrum, 0, sizeof(spectrum));
3040
3041         spectrum.channel_count = cpu_to_le16(1);
3042         spectrum.flags =
3043             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3044         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3045         cmd.len = sizeof(spectrum);
3046         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3047
3048         if (iwl4965_is_associated(priv))
3049                 spectrum.start_time =
3050                     iwl4965_add_beacon_time(priv->last_beacon_time,
3051                                 add_time,
3052                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3053         else
3054                 spectrum.start_time = 0;
3055
3056         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3057         spectrum.channels[0].channel = params->channel;
3058         spectrum.channels[0].type = type;
3059         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3060                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3061                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3062
3063         rc = iwl4965_send_cmd_sync(priv, &cmd);
3064         if (rc)
3065                 return rc;
3066
3067         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
3068         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3069                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3070                 rc = -EIO;
3071         }
3072
3073         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3074         switch (spectrum_resp_status) {
3075         case 0:         /* Command will be handled */
3076                 if (res->u.spectrum.id != 0xff) {
3077                         IWL_DEBUG_INFO
3078                             ("Replaced existing measurement: %d\n",
3079                              res->u.spectrum.id);
3080                         priv->measurement_status &= ~MEASUREMENT_READY;
3081                 }
3082                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3083                 rc = 0;
3084                 break;
3085
3086         case 1:         /* Command will not be handled */
3087                 rc = -EAGAIN;
3088                 break;
3089         }
3090
3091         dev_kfree_skb_any(cmd.meta.u.skb);
3092
3093         return rc;
3094 }
3095 #endif
3096
3097 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
3098                                  struct iwl4965_tx_info *tx_sta)
3099 {
3100
3101         tx_sta->status.ack_signal = 0;
3102         tx_sta->status.excessive_retries = 0;
3103         tx_sta->status.queue_length = 0;
3104         tx_sta->status.queue_number = 0;
3105
3106         if (in_interrupt())
3107                 ieee80211_tx_status_irqsafe(priv->hw,
3108                                             tx_sta->skb[0], &(tx_sta->status));
3109         else
3110                 ieee80211_tx_status(priv->hw,
3111                                     tx_sta->skb[0], &(tx_sta->status));
3112
3113         tx_sta->skb[0] = NULL;
3114 }
3115
3116 /**
3117  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3118  *
3119  * When FW advances 'R' index, all entries between old and new 'R' index
3120  * need to be reclaimed. As result, some free space forms.  If there is
3121  * enough free space (> low mark), wake the stack that feeds us.
3122  */
3123 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3124 {
3125         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3126         struct iwl4965_queue *q = &txq->q;
3127         int nfreed = 0;
3128
3129         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3130                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3131                           "is out of range [0-%d] %d %d.\n", txq_id,
3132                           index, q->n_bd, q->write_ptr, q->read_ptr);
3133                 return 0;
3134         }
3135
3136         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3137                 q->read_ptr != index;
3138                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3139                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3140                         iwl4965_txstatus_to_ieee(priv,
3141                                         &(txq->txb[txq->q.read_ptr]));
3142                         iwl4965_hw_txq_free_tfd(priv, txq);
3143                 } else if (nfreed > 1) {
3144                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3145                                         q->write_ptr, q->read_ptr);
3146                         queue_work(priv->workqueue, &priv->restart);
3147                 }
3148                 nfreed++;
3149         }
3150
3151 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3152                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3153                         priv->mac80211_registered)
3154                 ieee80211_wake_queue(priv->hw, txq_id); */
3155
3156
3157         return nfreed;
3158 }
3159
3160 static int iwl4965_is_tx_success(u32 status)
3161 {
3162         status &= TX_STATUS_MSK;
3163         return (status == TX_STATUS_SUCCESS)
3164             || (status == TX_STATUS_DIRECT_DONE);
3165 }
3166
3167 /******************************************************************************
3168  *
3169  * Generic RX handler implementations
3170  *
3171  ******************************************************************************/
3172 #ifdef CONFIG_IWL4965_HT
3173
3174 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
3175                                     struct ieee80211_hdr *hdr)
3176 {
3177         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3178                 return IWL_AP_ID;
3179         else {
3180                 u8 *da = ieee80211_get_DA(hdr);
3181                 return iwl4965_hw_find_station(priv, da);
3182         }
3183 }
3184
3185 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
3186         struct iwl_priv *priv, int txq_id, int idx)
3187 {
3188         if (priv->txq[txq_id].txb[idx].skb[0])
3189                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3190                                 txb[idx].skb[0]->data;
3191         return NULL;
3192 }
3193
3194 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3195 {
3196         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3197                                 tx_resp->frame_count);
3198         return le32_to_cpu(*scd_ssn) & MAX_SN;
3199
3200 }
3201
3202 /**
3203  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3204  */
3205 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3206                                       struct iwl4965_ht_agg *agg,
3207                                       struct iwl4965_tx_resp_agg *tx_resp,
3208                                       u16 start_idx)
3209 {
3210         u16 status;
3211         struct agg_tx_status *frame_status = &tx_resp->status;
3212         struct ieee80211_tx_status *tx_status = NULL;
3213         struct ieee80211_hdr *hdr = NULL;
3214         int i, sh;
3215         int txq_id, idx;
3216         u16 seq;
3217
3218         if (agg->wait_for_ba)
3219                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3220
3221         agg->frame_count = tx_resp->frame_count;
3222         agg->start_idx = start_idx;
3223         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3224         agg->bitmap = 0;
3225
3226         /* # frames attempted by Tx command */
3227         if (agg->frame_count == 1) {
3228                 /* Only one frame was attempted; no block-ack will arrive */
3229                 status = le16_to_cpu(frame_status[0].status);
3230                 seq  = le16_to_cpu(frame_status[0].sequence);
3231                 idx = SEQ_TO_INDEX(seq);
3232                 txq_id = SEQ_TO_QUEUE(seq);
3233
3234                 /* FIXME: code repetition */
3235                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3236                                    agg->frame_count, agg->start_idx, idx);
3237
3238                 tx_status = &(priv->txq[txq_id].txb[idx].status);
3239                 tx_status->retry_count = tx_resp->failure_frame;
3240                 tx_status->queue_number = status & 0xff;
3241                 tx_status->queue_length = tx_resp->failure_rts;
3242                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
3243                 tx_status->flags = iwl4965_is_tx_success(status)?
3244                         IEEE80211_TX_STATUS_ACK : 0;
3245                 iwl4965_hwrate_to_tx_control(priv,
3246                                              le32_to_cpu(tx_resp->rate_n_flags),
3247                                              &tx_status->control);
3248                 /* FIXME: code repetition end */
3249
3250                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3251                                     status & 0xff, tx_resp->failure_frame);
3252                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3253                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3254
3255                 agg->wait_for_ba = 0;
3256         } else {
3257                 /* Two or more frames were attempted; expect block-ack */
3258                 u64 bitmap = 0;
3259                 int start = agg->start_idx;
3260
3261                 /* Construct bit-map of pending frames within Tx window */
3262                 for (i = 0; i < agg->frame_count; i++) {
3263                         u16 sc;
3264                         status = le16_to_cpu(frame_status[i].status);
3265                         seq  = le16_to_cpu(frame_status[i].sequence);
3266                         idx = SEQ_TO_INDEX(seq);
3267                         txq_id = SEQ_TO_QUEUE(seq);
3268
3269                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3270                                       AGG_TX_STATE_ABORT_MSK))
3271                                 continue;
3272
3273                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3274                                            agg->frame_count, txq_id, idx);
3275
3276                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3277
3278                         sc = le16_to_cpu(hdr->seq_ctrl);
3279                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3280                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3281                                           " idx=%d, seq_idx=%d, seq=%d\n",
3282                                           idx, SEQ_TO_SN(sc),
3283                                           hdr->seq_ctrl);
3284                                 return -1;
3285                         }
3286
3287                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3288                                            i, idx, SEQ_TO_SN(sc));
3289
3290                         sh = idx - start;
3291                         if (sh > 64) {
3292                                 sh = (start - idx) + 0xff;
3293                                 bitmap = bitmap << sh;
3294                                 sh = 0;
3295                                 start = idx;
3296                         } else if (sh < -64)
3297                                 sh  = 0xff - (start - idx);
3298                         else if (sh < 0) {
3299                                 sh = start - idx;
3300                                 start = idx;
3301                                 bitmap = bitmap << sh;
3302                                 sh = 0;
3303                         }
3304                         bitmap |= (1 << sh);
3305                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3306                                            start, (u32)(bitmap & 0xFFFFFFFF));
3307                 }
3308
3309                 agg->bitmap = bitmap;
3310                 agg->start_idx = start;
3311                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3312                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3313                                    agg->frame_count, agg->start_idx,
3314                                    agg->bitmap);
3315
3316                 if (bitmap)
3317                         agg->wait_for_ba = 1;
3318         }
3319         return 0;
3320 }
3321 #endif
3322
3323 /**
3324  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3325  */
3326 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
3327                             struct iwl4965_rx_mem_buffer *rxb)
3328 {
3329         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3330         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3331         int txq_id = SEQ_TO_QUEUE(sequence);
3332         int index = SEQ_TO_INDEX(sequence);
3333         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3334         struct ieee80211_tx_status *tx_status;
3335         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3336         u32  status = le32_to_cpu(tx_resp->status);
3337 #ifdef CONFIG_IWL4965_HT
3338         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3339         struct ieee80211_hdr *hdr;
3340         __le16 *qc;
3341 #endif
3342
3343         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3344                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3345                           "is out of range [0-%d] %d %d\n", txq_id,
3346                           index, txq->q.n_bd, txq->q.write_ptr,
3347                           txq->q.read_ptr);
3348                 return;
3349         }
3350
3351 #ifdef CONFIG_IWL4965_HT
3352         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3353         qc = ieee80211_get_qos_ctrl(hdr);
3354
3355         if (qc)
3356                 tid = le16_to_cpu(*qc) & 0xf;
3357
3358         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3359         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3360                 IWL_ERROR("Station not known\n");
3361                 return;
3362         }
3363
3364         if (txq->sched_retry) {
3365                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3366                 struct iwl4965_ht_agg *agg = NULL;
3367
3368                 if (!qc)
3369                         return;
3370
3371                 agg = &priv->stations[sta_id].tid[tid].agg;
3372
3373                 iwl4965_tx_status_reply_tx(priv, agg,
3374                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3375
3376                 if ((tx_resp->frame_count == 1) &&
3377                     !iwl4965_is_tx_success(status)) {
3378                         /* TODO: send BAR */
3379                 }
3380
3381                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3382                         int freed;
3383                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3384                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3385                                            "%d index %d\n", scd_ssn , index);
3386                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3387                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3388
3389                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3390                             txq_id >= 0 && priv->mac80211_registered &&
3391                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3392                                 ieee80211_wake_queue(priv->hw, txq_id);
3393
3394                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3395                 }
3396         } else {
3397 #endif /* CONFIG_IWL4965_HT */
3398         tx_status = &(txq->txb[txq->q.read_ptr].status);
3399
3400         tx_status->retry_count = tx_resp->failure_frame;
3401         tx_status->queue_number = status;
3402         tx_status->queue_length = tx_resp->bt_kill_count;
3403         tx_status->queue_length |= tx_resp->failure_rts;
3404         tx_status->flags =
3405             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3406         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3407                                      &tx_status->control);
3408
3409         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3410                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3411                      status, le32_to_cpu(tx_resp->rate_n_flags),
3412                      tx_resp->failure_frame);
3413
3414         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3415         if (index != -1) {
3416                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3417 #ifdef CONFIG_IWL4965_HT
3418                 if (tid != MAX_TID_COUNT)
3419                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3420                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3421                         (txq_id >= 0) &&
3422                         priv->mac80211_registered)
3423                         ieee80211_wake_queue(priv->hw, txq_id);
3424                 if (tid != MAX_TID_COUNT)
3425                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3426 #endif
3427         }
3428 #ifdef CONFIG_IWL4965_HT
3429         }
3430 #endif /* CONFIG_IWL4965_HT */
3431
3432         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3433                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3434 }
3435
3436
3437 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
3438                                struct iwl4965_rx_mem_buffer *rxb)
3439 {
3440         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3441         struct iwl4965_alive_resp *palive;
3442         struct delayed_work *pwork;
3443
3444         palive = &pkt->u.alive_frame;
3445
3446         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3447                        "0x%01X 0x%01X\n",
3448                        palive->is_valid, palive->ver_type,
3449                        palive->ver_subtype);
3450
3451         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3452                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3453                 memcpy(&priv->card_alive_init,
3454                        &pkt->u.alive_frame,
3455                        sizeof(struct iwl4965_init_alive_resp));
3456                 pwork = &priv->init_alive_start;
3457         } else {
3458                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3459                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3460                        sizeof(struct iwl4965_alive_resp));
3461                 pwork = &priv->alive_start;
3462         }
3463
3464         /* We delay the ALIVE response by 5ms to
3465          * give the HW RF Kill time to activate... */
3466         if (palive->is_valid == UCODE_VALID_OK)
3467                 queue_delayed_work(priv->workqueue, pwork,
3468                                    msecs_to_jiffies(5));
3469         else
3470                 IWL_WARNING("uCode did not respond OK.\n");
3471 }
3472
3473 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
3474                                  struct iwl4965_rx_mem_buffer *rxb)
3475 {
3476         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3477
3478         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3479         return;
3480 }
3481
3482 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
3483                                struct iwl4965_rx_mem_buffer *rxb)
3484 {
3485         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3486
3487         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3488                 "seq 0x%04X ser 0x%08X\n",
3489                 le32_to_cpu(pkt->u.err_resp.error_type),
3490                 get_cmd_string(pkt->u.err_resp.cmd_id),
3491                 pkt->u.err_resp.cmd_id,
3492                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3493                 le32_to_cpu(pkt->u.err_resp.error_info));
3494 }
3495
3496 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3497
3498 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3499 {
3500         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3501         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3502         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3503         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3504                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3505         rxon->channel = csa->channel;
3506         priv->staging_rxon.channel = csa->channel;
3507 }
3508
3509 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
3510                                           struct iwl4965_rx_mem_buffer *rxb)
3511 {
3512 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3513         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3514         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3515
3516         if (!report->state) {
3517                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3518                           "Spectrum Measure Notification: Start\n");
3519                 return;
3520         }
3521
3522         memcpy(&priv->measure_report, report, sizeof(*report));
3523         priv->measurement_status |= MEASUREMENT_READY;
3524 #endif
3525 }
3526
3527 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
3528                                   struct iwl4965_rx_mem_buffer *rxb)
3529 {
3530 #ifdef CONFIG_IWLWIFI_DEBUG
3531         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3532         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3533         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3534                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3535 #endif
3536 }
3537
3538 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3539                                              struct iwl4965_rx_mem_buffer *rxb)
3540 {
3541         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3542         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3543                         "notification for %s:\n",
3544                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3545         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3546 }
3547
3548 static void iwl4965_bg_beacon_update(struct work_struct *work)
3549 {
3550         struct iwl_priv *priv =
3551                 container_of(work, struct iwl_priv, beacon_update);
3552         struct sk_buff *beacon;
3553
3554         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3555         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3556
3557         if (!beacon) {
3558                 IWL_ERROR("update beacon failed\n");
3559                 return;
3560         }
3561
3562         mutex_lock(&priv->mutex);
3563         /* new beacon skb is allocated every time; dispose previous.*/
3564         if (priv->ibss_beacon)
3565                 dev_kfree_skb(priv->ibss_beacon);
3566
3567         priv->ibss_beacon = beacon;
3568         mutex_unlock(&priv->mutex);
3569
3570         iwl4965_send_beacon_cmd(priv);
3571 }
3572
3573 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3574                                 struct iwl4965_rx_mem_buffer *rxb)
3575 {
3576 #ifdef CONFIG_IWLWIFI_DEBUG
3577         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3578         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3579         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3580
3581         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3582                 "tsf %d %d rate %d\n",
3583                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3584                 beacon->beacon_notify_hdr.failure_frame,
3585                 le32_to_cpu(beacon->ibss_mgr_status),
3586                 le32_to_cpu(beacon->high_tsf),
3587                 le32_to_cpu(beacon->low_tsf), rate);
3588 #endif
3589
3590         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3591             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3592                 queue_work(priv->workqueue, &priv->beacon_update);
3593 }
3594
3595 /* Service response to REPLY_SCAN_CMD (0x80) */
3596 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3597                               struct iwl4965_rx_mem_buffer *rxb)
3598 {
3599 #ifdef CONFIG_IWLWIFI_DEBUG
3600         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3601         struct iwl4965_scanreq_notification *notif =
3602             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3603
3604         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3605 #endif
3606 }
3607
3608 /* Service SCAN_START_NOTIFICATION (0x82) */
3609 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3610                                     struct iwl4965_rx_mem_buffer *rxb)
3611 {
3612         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3613         struct iwl4965_scanstart_notification *notif =
3614             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3615         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3616         IWL_DEBUG_SCAN("Scan start: "
3617                        "%d [802.11%s] "
3618                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3619                        notif->channel,
3620                        notif->band ? "bg" : "a",
3621                        notif->tsf_high,
3622                        notif->tsf_low, notif->status, notif->beacon_timer);
3623 }
3624
3625 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3626 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3627                                       struct iwl4965_rx_mem_buffer *rxb)
3628 {
3629         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3630         struct iwl4965_scanresults_notification *notif =
3631             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3632
3633         IWL_DEBUG_SCAN("Scan ch.res: "
3634                        "%d [802.11%s] "
3635                        "(TSF: 0x%08X:%08X) - %d "
3636                        "elapsed=%lu usec (%dms since last)\n",
3637                        notif->channel,
3638                        notif->band ? "bg" : "a",
3639                        le32_to_cpu(notif->tsf_high),
3640                        le32_to_cpu(notif->tsf_low),
3641                        le32_to_cpu(notif->statistics[0]),
3642                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3643                        jiffies_to_msecs(elapsed_jiffies
3644                                         (priv->last_scan_jiffies, jiffies)));
3645
3646         priv->last_scan_jiffies = jiffies;
3647         priv->next_scan_jiffies = 0;
3648 }
3649
3650 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3651 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3652                                        struct iwl4965_rx_mem_buffer *rxb)
3653 {
3654         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3655         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3656
3657         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3658                        scan_notif->scanned_channels,
3659                        scan_notif->tsf_low,
3660                        scan_notif->tsf_high, scan_notif->status);
3661
3662         /* The HW is no longer scanning */
3663         clear_bit(STATUS_SCAN_HW, &priv->status);
3664
3665         /* The scan completion notification came in, so kill that timer... */
3666         cancel_delayed_work(&priv->scan_check);
3667
3668         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3669                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3670                        jiffies_to_msecs(elapsed_jiffies
3671                                         (priv->scan_pass_start, jiffies)));
3672
3673         /* Remove this scanned band from the list
3674          * of pending bands to scan */
3675         priv->scan_bands--;
3676
3677         /* If a request to abort was given, or the scan did not succeed
3678          * then we reset the scan state machine and terminate,
3679          * re-queuing another scan if one has been requested */
3680         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3681                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3682                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3683         } else {
3684                 /* If there are more bands on this scan pass reschedule */
3685                 if (priv->scan_bands > 0)
3686                         goto reschedule;
3687         }
3688
3689         priv->last_scan_jiffies = jiffies;
3690         priv->next_scan_jiffies = 0;
3691         IWL_DEBUG_INFO("Setting scan to off\n");
3692
3693         clear_bit(STATUS_SCANNING, &priv->status);
3694
3695         IWL_DEBUG_INFO("Scan took %dms\n",
3696                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3697
3698         queue_work(priv->workqueue, &priv->scan_completed);
3699
3700         return;
3701
3702 reschedule:
3703         priv->scan_pass_start = jiffies;
3704         queue_work(priv->workqueue, &priv->request_scan);
3705 }
3706
3707 /* Handle notification from uCode that card's power state is changing
3708  * due to software, hardware, or critical temperature RFKILL */
3709 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3710                                     struct iwl4965_rx_mem_buffer *rxb)
3711 {
3712         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3713         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3714         unsigned long status = priv->status;
3715
3716         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3717                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3718                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3719
3720         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3721                      RF_CARD_DISABLED)) {
3722
3723                 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3724                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3725
3726                 if (!iwl4965_grab_nic_access(priv)) {
3727                         iwl4965_write_direct32(
3728                                 priv, HBUS_TARG_MBX_C,
3729                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3730
3731                         iwl4965_release_nic_access(priv);
3732                 }
3733
3734                 if (!(flags & RXON_CARD_DISABLED)) {
3735                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3736                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3737                         if (!iwl4965_grab_nic_access(priv)) {
3738                                 iwl4965_write_direct32(
3739                                         priv, HBUS_TARG_MBX_C,
3740                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3741
3742                                 iwl4965_release_nic_access(priv);
3743                         }
3744                 }
3745
3746                 if (flags & RF_CARD_DISABLED) {
3747                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3748                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3749                         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3750                         if (!iwl4965_grab_nic_access(priv))
3751                                 iwl4965_release_nic_access(priv);
3752                 }
3753         }
3754
3755         if (flags & HW_CARD_DISABLED)
3756                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3757         else
3758                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3759
3760
3761         if (flags & SW_CARD_DISABLED)
3762                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3763         else
3764                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3765
3766         if (!(flags & RXON_CARD_DISABLED))
3767                 iwl4965_scan_cancel(priv);
3768
3769         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3770              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3771             (test_bit(STATUS_RF_KILL_SW, &status) !=
3772              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3773                 queue_work(priv->workqueue, &priv->rf_kill);
3774         else
3775                 wake_up_interruptible(&priv->wait_command_queue);
3776 }
3777
3778 /**
3779  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3780  *
3781  * Setup the RX handlers for each of the reply types sent from the uCode
3782  * to the host.
3783  *
3784  * This function chains into the hardware specific files for them to setup
3785  * any hardware specific handlers as well.
3786  */
3787 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3788 {
3789         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3790         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3791         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3792         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3793         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3794             iwl4965_rx_spectrum_measure_notif;
3795         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3796         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3797             iwl4965_rx_pm_debug_statistics_notif;
3798         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3799
3800         /*
3801          * The same handler is used for both the REPLY to a discrete
3802          * statistics request from the host as well as for the periodic
3803          * statistics notifications (after received beacons) from the uCode.
3804          */
3805         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3806         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3807
3808         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3809         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3810         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3811             iwl4965_rx_scan_results_notif;
3812         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3813             iwl4965_rx_scan_complete_notif;
3814         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3815         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3816
3817         /* Set up hardware specific Rx handlers */
3818         iwl4965_hw_rx_handler_setup(priv);
3819 }
3820
3821 /**
3822  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3823  * @rxb: Rx buffer to reclaim
3824  *
3825  * If an Rx buffer has an async callback associated with it the callback
3826  * will be executed.  The attached skb (if present) will only be freed
3827  * if the callback returns 1
3828  */
3829 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3830                                 struct iwl4965_rx_mem_buffer *rxb)
3831 {
3832         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3833         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3834         int txq_id = SEQ_TO_QUEUE(sequence);
3835         int index = SEQ_TO_INDEX(sequence);
3836         int huge = sequence & SEQ_HUGE_FRAME;
3837         int cmd_index;
3838         struct iwl4965_cmd *cmd;
3839
3840         /* If a Tx command is being handled and it isn't in the actual
3841          * command queue then there a command routing bug has been introduced
3842          * in the queue management code. */
3843         if (txq_id != IWL_CMD_QUEUE_NUM)
3844                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3845                           txq_id, pkt->hdr.cmd);
3846         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3847
3848         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3849         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3850
3851         /* Input error checking is done when commands are added to queue. */
3852         if (cmd->meta.flags & CMD_WANT_SKB) {
3853                 cmd->meta.source->u.skb = rxb->skb;
3854                 rxb->skb = NULL;
3855         } else if (cmd->meta.u.callback &&
3856                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3857                 rxb->skb = NULL;
3858
3859         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3860
3861         if (!(cmd->meta.flags & CMD_ASYNC)) {
3862                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3863                 wake_up_interruptible(&priv->wait_command_queue);
3864         }
3865 }
3866
3867 /************************** RX-FUNCTIONS ****************************/
3868 /*
3869  * Rx theory of operation
3870  *
3871  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3872  * each of which point to Receive Buffers to be filled by 4965.  These get
3873  * used not only for Rx frames, but for any command response or notification
3874  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3875  * of indexes into the circular buffer.
3876  *
3877  * Rx Queue Indexes
3878  * The host/firmware share two index registers for managing the Rx buffers.
3879  *
3880  * The READ index maps to the first position that the firmware may be writing
3881  * to -- the driver can read up to (but not including) this position and get
3882  * good data.
3883  * The READ index is managed by the firmware once the card is enabled.
3884  *
3885  * The WRITE index maps to the last position the driver has read from -- the
3886  * position preceding WRITE is the last slot the firmware can place a packet.
3887  *
3888  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3889  * WRITE = READ.
3890  *
3891  * During initialization, the host sets up the READ queue position to the first
3892  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3893  *
3894  * When the firmware places a packet in a buffer, it will advance the READ index
3895  * and fire the RX interrupt.  The driver can then query the READ index and
3896  * process as many packets as possible, moving the WRITE index forward as it
3897  * resets the Rx queue buffers with new memory.
3898  *
3899  * The management in the driver is as follows:
3900  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3901  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3902  *   to replenish the iwl->rxq->rx_free.
3903  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3904  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3905  *   'processed' and 'read' driver indexes as well)
3906  * + A received packet is processed and handed to the kernel network stack,
3907  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3908  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3909  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3910  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3911  *   were enough free buffers and RX_STALLED is set it is cleared.
3912  *
3913  *
3914  * Driver sequence:
3915  *
3916  * iwl4965_rx_queue_alloc()   Allocates rx_free
3917  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3918  *                            iwl4965_rx_queue_restock
3919  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3920  *                            queue, updates firmware pointers, and updates
3921  *                            the WRITE index.  If insufficient rx_free buffers
3922  *                            are available, schedules iwl4965_rx_replenish
3923  *
3924  * -- enable interrupts --
3925  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3926  *                            READ INDEX, detaching the SKB from the pool.
3927  *                            Moves the packet buffer from queue to rx_used.
3928  *                            Calls iwl4965_rx_queue_restock to refill any empty
3929  *                            slots.
3930  * ...
3931  *
3932  */
3933
3934 /**
3935  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3936  */
3937 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3938 {
3939         int s = q->read - q->write;
3940         if (s <= 0)
3941                 s += RX_QUEUE_SIZE;
3942         /* keep some buffer to not confuse full and empty queue */
3943         s -= 2;
3944         if (s < 0)
3945                 s = 0;
3946         return s;
3947 }
3948
3949 /**
3950  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3951  */
3952 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3953 {
3954         u32 reg = 0;
3955         int rc = 0;
3956         unsigned long flags;
3957
3958         spin_lock_irqsave(&q->lock, flags);
3959
3960         if (q->need_update == 0)
3961                 goto exit_unlock;
3962
3963         /* If power-saving is in use, make sure device is awake */
3964         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3965                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3966
3967                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3968                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
3969                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3970                         goto exit_unlock;
3971                 }
3972
3973                 rc = iwl4965_grab_nic_access(priv);
3974                 if (rc)
3975                         goto exit_unlock;
3976
3977                 /* Device expects a multiple of 8 */
3978                 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3979                                      q->write & ~0x7);
3980                 iwl4965_release_nic_access(priv);
3981
3982         /* Else device is assumed to be awake */
3983         } else
3984                 /* Device expects a multiple of 8 */
3985                 iwl4965_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3986
3987
3988         q->need_update = 0;
3989
3990  exit_unlock:
3991         spin_unlock_irqrestore(&q->lock, flags);
3992         return rc;
3993 }
3994
3995 /**
3996  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3997  */
3998 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3999                                           dma_addr_t dma_addr)
4000 {
4001         return cpu_to_le32((u32)(dma_addr >> 8));
4002 }
4003
4004
4005 /**
4006  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
4007  *
4008  * If there are slots in the RX queue that need to be restocked,
4009  * and we have free pre-allocated buffers, fill the ranks as much
4010  * as we can, pulling from rx_free.
4011  *
4012  * This moves the 'write' index forward to catch up with 'processed', and
4013  * also updates the memory address in the firmware to reference the new
4014  * target buffer.
4015  */
4016 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
4017 {
4018         struct iwl4965_rx_queue *rxq = &priv->rxq;
4019         struct list_head *element;
4020         struct iwl4965_rx_mem_buffer *rxb;
4021         unsigned long flags;
4022         int write, rc;
4023
4024         spin_lock_irqsave(&rxq->lock, flags);
4025         write = rxq->write & ~0x7;
4026         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4027                 /* Get next free Rx buffer, remove from free list */
4028                 element = rxq->rx_free.next;
4029                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4030                 list_del(element);
4031
4032                 /* Point to Rx buffer via next RBD in circular buffer */
4033                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4034                 rxq->queue[rxq->write] = rxb;
4035                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4036                 rxq->free_count--;
4037         }
4038         spin_unlock_irqrestore(&rxq->lock, flags);
4039         /* If the pre-allocated buffer pool is dropping low, schedule to
4040          * refill it */
4041         if (rxq->free_count <= RX_LOW_WATERMARK)
4042                 queue_work(priv->workqueue, &priv->rx_replenish);
4043
4044
4045         /* If we've added more space for the firmware to place data, tell it.
4046          * Increment device's write pointer in multiples of 8. */
4047         if ((write != (rxq->write & ~0x7))
4048             || (abs(rxq->write - rxq->read) > 7)) {
4049                 spin_lock_irqsave(&rxq->lock, flags);
4050                 rxq->need_update = 1;
4051                 spin_unlock_irqrestore(&rxq->lock, flags);
4052                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
4053                 if (rc)
4054                         return rc;
4055         }
4056
4057         return 0;
4058 }
4059
4060 /**
4061  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
4062  *
4063  * When moving to rx_free an SKB is allocated for the slot.
4064  *
4065  * Also restock the Rx queue via iwl4965_rx_queue_restock.
4066  * This is called as a scheduled work item (except for during initialization)
4067  */
4068 static void iwl4965_rx_allocate(struct iwl_priv *priv)
4069 {
4070         struct iwl4965_rx_queue *rxq = &priv->rxq;
4071         struct list_head *element;
4072         struct iwl4965_rx_mem_buffer *rxb;
4073         unsigned long flags;
4074         spin_lock_irqsave(&rxq->lock, flags);
4075         while (!list_empty(&rxq->rx_used)) {
4076                 element = rxq->rx_used.next;
4077                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4078
4079                 /* Alloc a new receive buffer */
4080                 rxb->skb =
4081                     alloc_skb(priv->hw_setting.rx_buf_size,
4082                                 __GFP_NOWARN | GFP_ATOMIC);
4083                 if (!rxb->skb) {
4084                         if (net_ratelimit())
4085                                 printk(KERN_CRIT DRV_NAME
4086                                        ": Can not allocate SKB buffers\n");
4087                         /* We don't reschedule replenish work here -- we will
4088                          * call the restock method and if it still needs
4089                          * more buffers it will schedule replenish */
4090                         break;
4091                 }
4092                 priv->alloc_rxb_skb++;
4093                 list_del(element);
4094
4095                 /* Get physical address of RB/SKB */
4096                 rxb->dma_addr =
4097                     pci_map_single(priv->pci_dev, rxb->skb->data,
4098                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
4099                 list_add_tail(&rxb->list, &rxq->rx_free);
4100                 rxq->free_count++;
4101         }
4102         spin_unlock_irqrestore(&rxq->lock, flags);
4103 }
4104
4105 /*
4106  * this should be called while priv->lock is locked
4107 */
4108 static void __iwl4965_rx_replenish(void *data)
4109 {
4110         struct iwl_priv *priv = data;
4111
4112         iwl4965_rx_allocate(priv);
4113         iwl4965_rx_queue_restock(priv);
4114 }
4115
4116
4117 void iwl4965_rx_replenish(void *data)
4118 {
4119         struct iwl_priv *priv = data;
4120         unsigned long flags;
4121
4122         iwl4965_rx_allocate(priv);
4123
4124         spin_lock_irqsave(&priv->lock, flags);
4125         iwl4965_rx_queue_restock(priv);
4126         spin_unlock_irqrestore(&priv->lock, flags);
4127 }
4128
4129 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4130  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4131  * This free routine walks the list of POOL entries and if SKB is set to
4132  * non NULL it is unmapped and freed
4133  */
4134 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
4135 {
4136         int i;
4137         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4138                 if (rxq->pool[i].skb != NULL) {
4139                         pci_unmap_single(priv->pci_dev,
4140                                          rxq->pool[i].dma_addr,
4141                                          priv->hw_setting.rx_buf_size,
4142                                          PCI_DMA_FROMDEVICE);
4143                         dev_kfree_skb(rxq->pool[i].skb);
4144                 }
4145         }
4146
4147         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4148                             rxq->dma_addr);
4149         rxq->bd = NULL;
4150 }
4151
4152 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
4153 {
4154         struct iwl4965_rx_queue *rxq = &priv->rxq;
4155         struct pci_dev *dev = priv->pci_dev;
4156         int i;
4157
4158         spin_lock_init(&rxq->lock);
4159         INIT_LIST_HEAD(&rxq->rx_free);
4160         INIT_LIST_HEAD(&rxq->rx_used);
4161
4162         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4163         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4164         if (!rxq->bd)
4165                 return -ENOMEM;
4166
4167         /* Fill the rx_used queue with _all_ of the Rx buffers */
4168         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4169                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4170
4171         /* Set us so that we have processed and used all buffers, but have
4172          * not restocked the Rx queue with fresh buffers */
4173         rxq->read = rxq->write = 0;
4174         rxq->free_count = 0;
4175         rxq->need_update = 0;
4176         return 0;
4177 }
4178
4179 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
4180 {
4181         unsigned long flags;
4182         int i;
4183         spin_lock_irqsave(&rxq->lock, flags);
4184         INIT_LIST_HEAD(&rxq->rx_free);
4185         INIT_LIST_HEAD(&rxq->rx_used);
4186         /* Fill the rx_used queue with _all_ of the Rx buffers */
4187         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4188                 /* In the reset function, these buffers may have been allocated
4189                  * to an SKB, so we need to unmap and free potential storage */
4190                 if (rxq->pool[i].skb != NULL) {
4191                         pci_unmap_single(priv->pci_dev,
4192                                          rxq->pool[i].dma_addr,
4193                                          priv->hw_setting.rx_buf_size,
4194                                          PCI_DMA_FROMDEVICE);
4195                         priv->alloc_rxb_skb--;
4196                         dev_kfree_skb(rxq->pool[i].skb);
4197                         rxq->pool[i].skb = NULL;
4198                 }
4199                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4200         }
4201
4202         /* Set us so that we have processed and used all buffers, but have
4203          * not restocked the Rx queue with fresh buffers */
4204         rxq->read = rxq->write = 0;
4205         rxq->free_count = 0;
4206         spin_unlock_irqrestore(&rxq->lock, flags);
4207 }
4208
4209 /* Convert linear signal-to-noise ratio into dB */
4210 static u8 ratio2dB[100] = {
4211 /*       0   1   2   3   4   5   6   7   8   9 */
4212          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4213         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4214         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4215         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4216         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4217         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4218         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4219         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4220         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4221         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4222 };
4223
4224 /* Calculates a relative dB value from a ratio of linear
4225  *   (i.e. not dB) signal levels.
4226  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4227 int iwl4965_calc_db_from_ratio(int sig_ratio)
4228 {
4229         /* 1000:1 or higher just report as 60 dB */
4230         if (sig_ratio >= 1000)
4231                 return 60;
4232
4233         /* 100:1 or higher, divide by 10 and use table,
4234          *   add 20 dB to make up for divide by 10 */
4235         if (sig_ratio >= 100)
4236                 return (20 + (int)ratio2dB[sig_ratio/10]);
4237
4238         /* We shouldn't see this */
4239         if (sig_ratio < 1)
4240                 return 0;
4241
4242         /* Use table for ratios 1:1 - 99:1 */
4243         return (int)ratio2dB[sig_ratio];
4244 }
4245
4246 #define PERFECT_RSSI (-20) /* dBm */
4247 #define WORST_RSSI (-95)   /* dBm */
4248 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4249
4250 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4251  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4252  *   about formulas used below. */
4253 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4254 {
4255         int sig_qual;
4256         int degradation = PERFECT_RSSI - rssi_dbm;
4257
4258         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4259          * as indicator; formula is (signal dbm - noise dbm).
4260          * SNR at or above 40 is a great signal (100%).
4261          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4262          * Weakest usable signal is usually 10 - 15 dB SNR. */
4263         if (noise_dbm) {
4264                 if (rssi_dbm - noise_dbm >= 40)
4265                         return 100;
4266                 else if (rssi_dbm < noise_dbm)
4267                         return 0;
4268                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4269
4270         /* Else use just the signal level.
4271          * This formula is a least squares fit of data points collected and
4272          *   compared with a reference system that had a percentage (%) display
4273          *   for signal quality. */
4274         } else
4275                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4276                             (15 * RSSI_RANGE + 62 * degradation)) /
4277                            (RSSI_RANGE * RSSI_RANGE);
4278
4279         if (sig_qual > 100)
4280                 sig_qual = 100;
4281         else if (sig_qual < 1)
4282                 sig_qual = 0;
4283
4284         return sig_qual;
4285 }
4286
4287 /**
4288  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4289  *
4290  * Uses the priv->rx_handlers callback function array to invoke
4291  * the appropriate handlers, including command responses,
4292  * frame-received notifications, and other notifications.
4293  */
4294 static void iwl4965_rx_handle(struct iwl_priv *priv)
4295 {
4296         struct iwl4965_rx_mem_buffer *rxb;
4297         struct iwl4965_rx_packet *pkt;
4298         struct iwl4965_rx_queue *rxq = &priv->rxq;
4299         u32 r, i;
4300         int reclaim;
4301         unsigned long flags;
4302         u8 fill_rx = 0;
4303         u32 count = 8;
4304
4305         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4306          * buffer that the driver may process (last buffer filled by ucode). */
4307         r = iwl4965_hw_get_rx_read(priv);
4308         i = rxq->read;
4309
4310         /* Rx interrupt, but nothing sent from uCode */
4311         if (i == r)
4312                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4313
4314         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4315                 fill_rx = 1;
4316
4317         while (i != r) {
4318                 rxb = rxq->queue[i];
4319
4320                 /* If an RXB doesn't have a Rx queue slot associated with it,
4321                  * then a bug has been introduced in the queue refilling
4322                  * routines -- catch it here */
4323                 BUG_ON(rxb == NULL);
4324
4325                 rxq->queue[i] = NULL;
4326
4327                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4328                                             priv->hw_setting.rx_buf_size,
4329                                             PCI_DMA_FROMDEVICE);
4330                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4331
4332                 /* Reclaim a command buffer only if this packet is a response
4333                  *   to a (driver-originated) command.
4334                  * If the packet (e.g. Rx frame) originated from uCode,
4335                  *   there is no command buffer to reclaim.
4336                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4337                  *   but apparently a few don't get set; catch them here. */
4338                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4339                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4340                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4341                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4342                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4343                         (pkt->hdr.cmd != REPLY_TX);
4344
4345                 /* Based on type of command response or notification,
4346                  *   handle those that need handling via function in
4347                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4348                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4349                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4350                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4351                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4352                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4353                 } else {
4354                         /* No handling needed */
4355                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4356                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4357                                 r, i, get_cmd_string(pkt->hdr.cmd),
4358                                 pkt->hdr.cmd);
4359                 }
4360
4361                 if (reclaim) {
4362                         /* Invoke any callbacks, transfer the skb to caller, and
4363                          * fire off the (possibly) blocking iwl4965_send_cmd()
4364                          * as we reclaim the driver command queue */
4365                         if (rxb && rxb->skb)
4366                                 iwl4965_tx_cmd_complete(priv, rxb);
4367                         else
4368                                 IWL_WARNING("Claim null rxb?\n");
4369                 }
4370
4371                 /* For now we just don't re-use anything.  We can tweak this
4372                  * later to try and re-use notification packets and SKBs that
4373                  * fail to Rx correctly */
4374                 if (rxb->skb != NULL) {
4375                         priv->alloc_rxb_skb--;
4376                         dev_kfree_skb_any(rxb->skb);
4377                         rxb->skb = NULL;
4378                 }
4379
4380                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4381                                  priv->hw_setting.rx_buf_size,
4382                                  PCI_DMA_FROMDEVICE);
4383                 spin_lock_irqsave(&rxq->lock, flags);
4384                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4385                 spin_unlock_irqrestore(&rxq->lock, flags);
4386                 i = (i + 1) & RX_QUEUE_MASK;
4387                 /* If there are a lot of unused frames,
4388                  * restock the Rx queue so ucode wont assert. */
4389                 if (fill_rx) {
4390                         count++;
4391                         if (count >= 8) {
4392                                 priv->rxq.read = i;
4393                                 __iwl4965_rx_replenish(priv);
4394                                 count = 0;
4395                         }
4396                 }
4397         }
4398
4399         /* Backtrack one entry */
4400         priv->rxq.read = i;
4401         iwl4965_rx_queue_restock(priv);
4402 }
4403
4404 /**
4405  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4406  */
4407 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
4408                                   struct iwl4965_tx_queue *txq)
4409 {
4410         u32 reg = 0;
4411         int rc = 0;
4412         int txq_id = txq->q.id;
4413
4414         if (txq->need_update == 0)
4415                 return rc;
4416
4417         /* if we're trying to save power */
4418         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4419                 /* wake up nic if it's powered down ...
4420                  * uCode will wake up, and interrupt us again, so next
4421                  * time we'll skip this part. */
4422                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4423
4424                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4425                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4426                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4427                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4428                         return rc;
4429                 }
4430
4431                 /* restore this queue's parameters in nic hardware. */
4432                 rc = iwl4965_grab_nic_access(priv);
4433                 if (rc)
4434                         return rc;
4435                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
4436                                      txq->q.write_ptr | (txq_id << 8));
4437                 iwl4965_release_nic_access(priv);
4438
4439         /* else not in power-save mode, uCode will never sleep when we're
4440          * trying to tx (during RFKILL, we're not trying to tx). */
4441         } else
4442                 iwl4965_write32(priv, HBUS_TARG_WRPTR,
4443                             txq->q.write_ptr | (txq_id << 8));
4444
4445         txq->need_update = 0;
4446
4447         return rc;
4448 }
4449
4450 #ifdef CONFIG_IWLWIFI_DEBUG
4451 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4452 {
4453         DECLARE_MAC_BUF(mac);
4454
4455         IWL_DEBUG_RADIO("RX CONFIG:\n");
4456         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4457         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4458         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4459         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4460                         le32_to_cpu(rxon->filter_flags));
4461         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4462         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4463                         rxon->ofdm_basic_rates);
4464         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4465         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4466                         print_mac(mac, rxon->node_addr));
4467         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4468                         print_mac(mac, rxon->bssid_addr));
4469         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4470 }
4471 #endif
4472
4473 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
4474 {
4475         IWL_DEBUG_ISR("Enabling interrupts\n");
4476         set_bit(STATUS_INT_ENABLED, &priv->status);
4477         iwl4965_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4478 }
4479
4480 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
4481 {
4482         clear_bit(STATUS_INT_ENABLED, &priv->status);
4483
4484         /* disable interrupts from uCode/NIC to host */
4485         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4486
4487         /* acknowledge/clear/reset any interrupts still pending
4488          * from uCode or flow handler (Rx/Tx DMA) */
4489         iwl4965_write32(priv, CSR_INT, 0xffffffff);
4490         iwl4965_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4491         IWL_DEBUG_ISR("Disabled interrupts\n");
4492 }
4493
4494 static const char *desc_lookup(int i)
4495 {
4496         switch (i) {
4497         case 1:
4498                 return "FAIL";
4499         case 2:
4500                 return "BAD_PARAM";
4501         case 3:
4502                 return "BAD_CHECKSUM";
4503         case 4:
4504                 return "NMI_INTERRUPT";
4505         case 5:
4506                 return "SYSASSERT";
4507         case 6:
4508                 return "FATAL_ERROR";
4509         }
4510
4511         return "UNKNOWN";
4512 }
4513
4514 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4515 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4516
4517 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
4518 {
4519         u32 data2, line;
4520         u32 desc, time, count, base, data1;
4521         u32 blink1, blink2, ilink1, ilink2;
4522         int rc;
4523
4524         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4525
4526         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4527                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4528                 return;
4529         }
4530
4531         rc = iwl4965_grab_nic_access(priv);
4532         if (rc) {
4533                 IWL_WARNING("Can not read from adapter at this time.\n");
4534                 return;
4535         }
4536
4537         count = iwl4965_read_targ_mem(priv, base);
4538
4539         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4540                 IWL_ERROR("Start IWL Error Log Dump:\n");
4541                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4542         }
4543
4544         desc = iwl4965_read_targ_mem(priv, base + 1 * sizeof(u32));
4545         blink1 = iwl4965_read_targ_mem(priv, base + 3 * sizeof(u32));
4546         blink2 = iwl4965_read_targ_mem(priv, base + 4 * sizeof(u32));
4547         ilink1 = iwl4965_read_targ_mem(priv, base + 5 * sizeof(u32));
4548         ilink2 = iwl4965_read_targ_mem(priv, base + 6 * sizeof(u32));
4549         data1 = iwl4965_read_targ_mem(priv, base + 7 * sizeof(u32));
4550         data2 = iwl4965_read_targ_mem(priv, base + 8 * sizeof(u32));
4551         line = iwl4965_read_targ_mem(priv, base + 9 * sizeof(u32));
4552         time = iwl4965_read_targ_mem(priv, base + 11 * sizeof(u32));
4553
4554         IWL_ERROR("Desc               Time       "
4555                   "data1      data2      line\n");
4556         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4557                   desc_lookup(desc), desc, time, data1, data2, line);
4558         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4559         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4560                   ilink1, ilink2);
4561
4562         iwl4965_release_nic_access(priv);
4563 }
4564
4565 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4566
4567 /**
4568  * iwl4965_print_event_log - Dump error event log to syslog
4569  *
4570  * NOTE: Must be called with iwl4965_grab_nic_access() already obtained!
4571  */
4572 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4573                                 u32 num_events, u32 mode)
4574 {
4575         u32 i;
4576         u32 base;       /* SRAM byte address of event log header */
4577         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4578         u32 ptr;        /* SRAM byte address of log data */
4579         u32 ev, time, data; /* event log data */
4580
4581         if (num_events == 0)
4582                 return;
4583
4584         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4585
4586         if (mode == 0)
4587                 event_size = 2 * sizeof(u32);
4588         else
4589                 event_size = 3 * sizeof(u32);
4590
4591         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4592
4593         /* "time" is actually "data" for mode 0 (no timestamp).
4594          * place event id # at far right for easier visual parsing. */
4595         for (i = 0; i < num_events; i++) {
4596                 ev = iwl4965_read_targ_mem(priv, ptr);
4597                 ptr += sizeof(u32);
4598                 time = iwl4965_read_targ_mem(priv, ptr);
4599                 ptr += sizeof(u32);
4600                 if (mode == 0)
4601                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4602                 else {
4603                         data = iwl4965_read_targ_mem(priv, ptr);
4604                         ptr += sizeof(u32);
4605                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4606                 }
4607         }
4608 }
4609
4610 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4611 {
4612         int rc;
4613         u32 base;       /* SRAM byte address of event log header */
4614         u32 capacity;   /* event log capacity in # entries */
4615         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4616         u32 num_wraps;  /* # times uCode wrapped to top of log */
4617         u32 next_entry; /* index of next entry to be written by uCode */
4618         u32 size;       /* # entries that we'll print */
4619
4620         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4621         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4622                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4623                 return;
4624         }
4625
4626         rc = iwl4965_grab_nic_access(priv);
4627         if (rc) {
4628                 IWL_WARNING("Can not read from adapter at this time.\n");
4629                 return;
4630         }
4631
4632         /* event log header */
4633         capacity = iwl4965_read_targ_mem(priv, base);
4634         mode = iwl4965_read_targ_mem(priv, base + (1 * sizeof(u32)));
4635         num_wraps = iwl4965_read_targ_mem(priv, base + (2 * sizeof(u32)));
4636         next_entry = iwl4965_read_targ_mem(priv, base + (3 * sizeof(u32)));
4637
4638         size = num_wraps ? capacity : next_entry;
4639
4640         /* bail out if nothing in log */
4641         if (size == 0) {
4642                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4643                 iwl4965_release_nic_access(priv);
4644                 return;
4645         }
4646
4647         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4648                   size, num_wraps);
4649
4650         /* if uCode has wrapped back to top of log, start at the oldest entry,
4651          * i.e the next one that uCode would fill. */
4652         if (num_wraps)
4653                 iwl4965_print_event_log(priv, next_entry,
4654                                     capacity - next_entry, mode);
4655
4656         /* (then/else) start at top of log */
4657         iwl4965_print_event_log(priv, 0, next_entry, mode);
4658
4659         iwl4965_release_nic_access(priv);
4660 }
4661
4662 /**
4663  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4664  */
4665 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4666 {
4667         /* Set the FW error flag -- cleared on iwl4965_down */
4668         set_bit(STATUS_FW_ERROR, &priv->status);
4669
4670         /* Cancel currently queued command. */
4671         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4672
4673 #ifdef CONFIG_IWLWIFI_DEBUG
4674         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4675                 iwl4965_dump_nic_error_log(priv);
4676                 iwl4965_dump_nic_event_log(priv);
4677                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4678         }
4679 #endif
4680
4681         wake_up_interruptible(&priv->wait_command_queue);
4682
4683         /* Keep the restart process from trying to send host
4684          * commands by clearing the INIT status bit */
4685         clear_bit(STATUS_READY, &priv->status);
4686
4687         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4688                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4689                           "Restarting adapter due to uCode error.\n");
4690
4691                 if (iwl4965_is_associated(priv)) {
4692                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4693                                sizeof(priv->recovery_rxon));
4694                         priv->error_recovering = 1;
4695                 }
4696                 queue_work(priv->workqueue, &priv->restart);
4697         }
4698 }
4699
4700 static void iwl4965_error_recovery(struct iwl_priv *priv)
4701 {
4702         unsigned long flags;
4703
4704         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4705                sizeof(priv->staging_rxon));
4706         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4707         iwl4965_commit_rxon(priv);
4708
4709         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4710
4711         spin_lock_irqsave(&priv->lock, flags);
4712         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4713         priv->error_recovering = 0;
4714         spin_unlock_irqrestore(&priv->lock, flags);
4715 }
4716
4717 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4718 {
4719         u32 inta, handled = 0;
4720         u32 inta_fh;
4721         unsigned long flags;
4722 #ifdef CONFIG_IWLWIFI_DEBUG
4723         u32 inta_mask;
4724 #endif
4725
4726         spin_lock_irqsave(&priv->lock, flags);
4727
4728         /* Ack/clear/reset pending uCode interrupts.
4729          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4730          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4731         inta = iwl4965_read32(priv, CSR_INT);
4732         iwl4965_write32(priv, CSR_INT, inta);
4733
4734         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4735          * Any new interrupts that happen after this, either while we're
4736          * in this tasklet, or later, will show up in next ISR/tasklet. */
4737         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4738         iwl4965_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4739
4740 #ifdef CONFIG_IWLWIFI_DEBUG
4741         if (iwl_debug_level & IWL_DL_ISR) {
4742                 /* just for debug */
4743                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
4744                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4745                               inta, inta_mask, inta_fh);
4746         }
4747 #endif
4748
4749         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4750          * atomic, make sure that inta covers all the interrupts that
4751          * we've discovered, even if FH interrupt came in just after
4752          * reading CSR_INT. */
4753         if (inta_fh & CSR49_FH_INT_RX_MASK)
4754                 inta |= CSR_INT_BIT_FH_RX;
4755         if (inta_fh & CSR49_FH_INT_TX_MASK)
4756                 inta |= CSR_INT_BIT_FH_TX;
4757
4758         /* Now service all interrupt bits discovered above. */
4759         if (inta & CSR_INT_BIT_HW_ERR) {
4760                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4761
4762                 /* Tell the device to stop sending interrupts */
4763                 iwl4965_disable_interrupts(priv);
4764
4765                 iwl4965_irq_handle_error(priv);
4766
4767                 handled |= CSR_INT_BIT_HW_ERR;
4768
4769                 spin_unlock_irqrestore(&priv->lock, flags);
4770
4771                 return;
4772         }
4773
4774 #ifdef CONFIG_IWLWIFI_DEBUG
4775         if (iwl_debug_level & (IWL_DL_ISR)) {
4776                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4777                 if (inta & CSR_INT_BIT_SCD)
4778                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4779                                       "the frame/frames.\n");
4780
4781                 /* Alive notification via Rx interrupt will do the real work */
4782                 if (inta & CSR_INT_BIT_ALIVE)
4783                         IWL_DEBUG_ISR("Alive interrupt\n");
4784         }
4785 #endif
4786         /* Safely ignore these bits for debug checks below */
4787         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4788
4789         /* HW RF KILL switch toggled */
4790         if (inta & CSR_INT_BIT_RF_KILL) {
4791                 int hw_rf_kill = 0;
4792                 if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
4793                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4794                         hw_rf_kill = 1;
4795
4796                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4797                                 "RF_KILL bit toggled to %s.\n",
4798                                 hw_rf_kill ? "disable radio":"enable radio");
4799
4800                 /* Queue restart only if RF_KILL switch was set to "kill"
4801                  *   when we loaded driver, and is now set to "enable".
4802                  * After we're Alive, RF_KILL gets handled by
4803                  *   iwl4965_rx_card_state_notif() */
4804                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4805                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4806                         queue_work(priv->workqueue, &priv->restart);
4807                 }
4808
4809                 handled |= CSR_INT_BIT_RF_KILL;
4810         }
4811
4812         /* Chip got too hot and stopped itself */
4813         if (inta & CSR_INT_BIT_CT_KILL) {
4814                 IWL_ERROR("Microcode CT kill error detected.\n");
4815                 handled |= CSR_INT_BIT_CT_KILL;
4816         }
4817
4818         /* Error detected by uCode */
4819         if (inta & CSR_INT_BIT_SW_ERR) {
4820                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4821                           inta);
4822                 iwl4965_irq_handle_error(priv);
4823                 handled |= CSR_INT_BIT_SW_ERR;
4824         }
4825
4826         /* uCode wakes up after power-down sleep */
4827         if (inta & CSR_INT_BIT_WAKEUP) {
4828                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4829                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4830                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4831                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4832                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4833                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4834                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4835                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4836
4837                 handled |= CSR_INT_BIT_WAKEUP;
4838         }
4839
4840         /* All uCode command responses, including Tx command responses,
4841          * Rx "responses" (frame-received notification), and other
4842          * notifications from uCode come through here*/
4843         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4844                 iwl4965_rx_handle(priv);
4845                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4846         }
4847
4848         if (inta & CSR_INT_BIT_FH_TX) {
4849                 IWL_DEBUG_ISR("Tx interrupt\n");
4850                 handled |= CSR_INT_BIT_FH_TX;
4851         }
4852
4853         if (inta & ~handled)
4854                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4855
4856         if (inta & ~CSR_INI_SET_MASK) {
4857                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4858                          inta & ~CSR_INI_SET_MASK);
4859                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4860         }
4861
4862         /* Re-enable all interrupts */
4863         iwl4965_enable_interrupts(priv);
4864
4865 #ifdef CONFIG_IWLWIFI_DEBUG
4866         if (iwl_debug_level & (IWL_DL_ISR)) {
4867                 inta = iwl4965_read32(priv, CSR_INT);
4868                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
4869                 inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4870                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4871                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4872         }
4873 #endif
4874         spin_unlock_irqrestore(&priv->lock, flags);
4875 }
4876
4877 static irqreturn_t iwl4965_isr(int irq, void *data)
4878 {
4879         struct iwl_priv *priv = data;
4880         u32 inta, inta_mask;
4881         u32 inta_fh;
4882         if (!priv)
4883                 return IRQ_NONE;
4884
4885         spin_lock(&priv->lock);
4886
4887         /* Disable (but don't clear!) interrupts here to avoid
4888          *    back-to-back ISRs and sporadic interrupts from our NIC.
4889          * If we have something to service, the tasklet will re-enable ints.
4890          * If we *don't* have something, we'll re-enable before leaving here. */
4891         inta_mask = iwl4965_read32(priv, CSR_INT_MASK);  /* just for debug */
4892         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4893
4894         /* Discover which interrupts are active/pending */
4895         inta = iwl4965_read32(priv, CSR_INT);
4896         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4897
4898         /* Ignore interrupt if there's nothing in NIC to service.
4899          * This may be due to IRQ shared with another device,
4900          * or due to sporadic interrupts thrown from our NIC. */
4901         if (!inta && !inta_fh) {
4902                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4903                 goto none;
4904         }
4905
4906         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4907                 /* Hardware disappeared. It might have already raised
4908                  * an interrupt */
4909                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4910                 goto unplugged;
4911         }
4912
4913         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4914                       inta, inta_mask, inta_fh);
4915
4916         inta &= ~CSR_INT_BIT_SCD;
4917
4918         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4919         if (likely(inta || inta_fh))
4920                 tasklet_schedule(&priv->irq_tasklet);
4921
4922  unplugged:
4923         spin_unlock(&priv->lock);
4924         return IRQ_HANDLED;
4925
4926  none:
4927         /* re-enable interrupts here since we don't have anything to service. */
4928         iwl4965_enable_interrupts(priv);
4929         spin_unlock(&priv->lock);
4930         return IRQ_NONE;
4931 }
4932
4933 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4934  * sending probe req.  This should be set long enough to hear probe responses
4935  * from more than one AP.  */
4936 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4937 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4938
4939 /* For faster active scanning, scan will move to the next channel if fewer than
4940  * PLCP_QUIET_THRESH packets are heard on this channel within
4941  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4942  * time if it's a quiet channel (nothing responded to our probe, and there's
4943  * no other traffic).
4944  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4945 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4946 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4947
4948 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4949  * Must be set longer than active dwell time.
4950  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4951 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4952 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4953 #define IWL_PASSIVE_DWELL_BASE      (100)
4954 #define IWL_CHANNEL_TUNE_TIME       5
4955
4956 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4957                                                 enum ieee80211_band band)
4958 {
4959         if (band == IEEE80211_BAND_5GHZ)
4960                 return IWL_ACTIVE_DWELL_TIME_52;
4961         else
4962                 return IWL_ACTIVE_DWELL_TIME_24;
4963 }
4964
4965 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4966                                           enum ieee80211_band band)
4967 {
4968         u16 active = iwl4965_get_active_dwell_time(priv, band);
4969         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4970             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4971             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4972
4973         if (iwl4965_is_associated(priv)) {
4974                 /* If we're associated, we clamp the maximum passive
4975                  * dwell time to be 98% of the beacon interval (minus
4976                  * 2 * channel tune time) */
4977                 passive = priv->beacon_int;
4978                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4979                         passive = IWL_PASSIVE_DWELL_BASE;
4980                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4981         }
4982
4983         if (passive <= active)
4984                 passive = active + 1;
4985
4986         return passive;
4987 }
4988
4989 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4990                                          enum ieee80211_band band,
4991                                      u8 is_active, u8 direct_mask,
4992                                      struct iwl4965_scan_channel *scan_ch)
4993 {
4994         const struct ieee80211_channel *channels = NULL;
4995         const struct ieee80211_supported_band *sband;
4996         const struct iwl_channel_info *ch_info;
4997         u16 passive_dwell = 0;
4998         u16 active_dwell = 0;
4999         int added, i;
5000
5001         sband = iwl4965_get_hw_mode(priv, band);
5002         if (!sband)
5003                 return 0;
5004
5005         channels = sband->channels;
5006
5007         active_dwell = iwl4965_get_active_dwell_time(priv, band);
5008         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
5009
5010         for (i = 0, added = 0; i < sband->n_channels; i++) {
5011                 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
5012                     le16_to_cpu(priv->active_rxon.channel)) {
5013                         if (iwl4965_is_associated(priv)) {
5014                                 IWL_DEBUG_SCAN
5015                                     ("Skipping current channel %d\n",
5016                                      le16_to_cpu(priv->active_rxon.channel));
5017                                 continue;
5018                         }
5019                 } else if (priv->only_active_channel)
5020                         continue;
5021
5022                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
5023
5024                 ch_info = iwl4965_get_channel_info(priv, band,
5025                                          scan_ch->channel);
5026                 if (!is_channel_valid(ch_info)) {
5027                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5028                                        scan_ch->channel);
5029                         continue;
5030                 }
5031
5032                 if (!is_active || is_channel_passive(ch_info) ||
5033                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
5034                         scan_ch->type = 0;      /* passive */
5035                 else
5036                         scan_ch->type = 1;      /* active */
5037
5038                 if (scan_ch->type & 1)
5039                         scan_ch->type |= (direct_mask << 1);
5040
5041                 if (is_channel_narrow(ch_info))
5042                         scan_ch->type |= (1 << 7);
5043
5044                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5045                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5046
5047                 /* Set txpower levels to defaults */
5048                 scan_ch->tpc.dsp_atten = 110;
5049                 /* scan_pwr_info->tpc.dsp_atten; */
5050
5051                 /*scan_pwr_info->tpc.tx_gain; */
5052                 if (band == IEEE80211_BAND_5GHZ)
5053                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5054                 else {
5055                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5056                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5057                          * power level:
5058                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5059                          */
5060                 }
5061
5062                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5063                                scan_ch->channel,
5064                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5065                                (scan_ch->type & 1) ?
5066                                active_dwell : passive_dwell);
5067
5068                 scan_ch++;
5069                 added++;
5070         }
5071
5072         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5073         return added;
5074 }
5075
5076 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
5077                               struct ieee80211_rate *rates)
5078 {
5079         int i;
5080
5081         for (i = 0; i < IWL_RATE_COUNT; i++) {
5082                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
5083                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5084                 rates[i].hw_value_short = i;
5085                 rates[i].flags = 0;
5086                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5087                         /*
5088                          * If CCK != 1M then set short preamble rate flag.
5089                          */
5090                         rates[i].flags |=
5091                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
5092                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
5093                 }
5094         }
5095 }
5096
5097 /**
5098  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
5099  */
5100 int iwl4965_init_geos(struct iwl_priv *priv)
5101 {
5102         struct iwl_channel_info *ch;
5103         struct ieee80211_supported_band *sband;
5104         struct ieee80211_channel *channels;
5105         struct ieee80211_channel *geo_ch;
5106         struct ieee80211_rate *rates;
5107         int i = 0;
5108
5109         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5110             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5111                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5112                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5113                 return 0;
5114         }
5115
5116         channels = kzalloc(sizeof(struct ieee80211_channel) *
5117                            priv->channel_count, GFP_KERNEL);
5118         if (!channels)
5119                 return -ENOMEM;
5120
5121         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5122                         GFP_KERNEL);
5123         if (!rates) {
5124                 kfree(channels);
5125                 return -ENOMEM;
5126         }
5127
5128         /* 5.2GHz channels start after the 2.4GHz channels */
5129         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5130         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5131         /* just OFDM */
5132         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5133         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5134
5135         iwl4965_init_ht_hw_capab(&sband->ht_info, IEEE80211_BAND_5GHZ);
5136
5137         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5138         sband->channels = channels;
5139         /* OFDM & CCK */
5140         sband->bitrates = rates;
5141         sband->n_bitrates = IWL_RATE_COUNT;
5142
5143         iwl4965_init_ht_hw_capab(&sband->ht_info, IEEE80211_BAND_2GHZ);
5144
5145         priv->ieee_channels = channels;
5146         priv->ieee_rates = rates;
5147
5148         iwl4965_init_hw_rates(priv, rates);
5149
5150         for (i = 0;  i < priv->channel_count; i++) {
5151                 ch = &priv->channel_info[i];
5152
5153                 /* FIXME: might be removed if scan is OK */
5154                 if (!is_channel_valid(ch))
5155                         continue;
5156
5157                 if (is_channel_a_band(ch))
5158                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5159                 else
5160                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5161
5162                 geo_ch = &sband->channels[sband->n_channels++];
5163
5164                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5165                 geo_ch->max_power = ch->max_power_avg;
5166                 geo_ch->max_antenna_gain = 0xff;
5167                 geo_ch->hw_value = ch->channel;
5168
5169                 if (is_channel_valid(ch)) {
5170                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5171                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5172
5173                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5174                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5175
5176                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5177                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5178
5179                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5180                                 priv->max_channel_txpower_limit =
5181                                     ch->max_power_avg;
5182                 } else {
5183                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5184                 }
5185
5186                 /* Save flags for reg domain usage */
5187                 geo_ch->orig_flags = geo_ch->flags;
5188
5189                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5190                                 ch->channel, geo_ch->center_freq,
5191                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5192                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5193                                 "restricted" : "valid",
5194                                  geo_ch->flags);
5195         }
5196
5197         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5198              priv->cfg->sku & IWL_SKU_A) {
5199                 printk(KERN_INFO DRV_NAME
5200                        ": Incorrectly detected BG card as ABG.  Please send "
5201                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5202                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5203                 priv->cfg->sku &= ~IWL_SKU_A;
5204         }
5205
5206         printk(KERN_INFO DRV_NAME
5207                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5208                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5209                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5210
5211         priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ];
5212         priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ];
5213
5214         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5215
5216         return 0;
5217 }
5218
5219 /*
5220  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5221  */
5222 void iwl4965_free_geos(struct iwl_priv *priv)
5223 {
5224         kfree(priv->ieee_channels);
5225         kfree(priv->ieee_rates);
5226         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5227 }
5228
5229 /******************************************************************************
5230  *
5231  * uCode download functions
5232  *
5233  ******************************************************************************/
5234
5235 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
5236 {
5237         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5238         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5239         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5240         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5241         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5242         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5243 }
5244
5245 /**
5246  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5247  *     looking at all data.
5248  */
5249 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
5250                                  u32 len)
5251 {
5252         u32 val;
5253         u32 save_len = len;
5254         int rc = 0;
5255         u32 errcnt;
5256
5257         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5258
5259         rc = iwl4965_grab_nic_access(priv);
5260         if (rc)
5261                 return rc;
5262
5263         iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5264
5265         errcnt = 0;
5266         for (; len > 0; len -= sizeof(u32), image++) {
5267                 /* read data comes through single port, auto-incr addr */
5268                 /* NOTE: Use the debugless read so we don't flood kernel log
5269                  * if IWL_DL_IO is set */
5270                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5271                 if (val != le32_to_cpu(*image)) {
5272                         IWL_ERROR("uCode INST section is invalid at "
5273                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5274                                   save_len - len, val, le32_to_cpu(*image));
5275                         rc = -EIO;
5276                         errcnt++;
5277                         if (errcnt >= 20)
5278                                 break;
5279                 }
5280         }
5281
5282         iwl4965_release_nic_access(priv);
5283
5284         if (!errcnt)
5285                 IWL_DEBUG_INFO
5286                     ("ucode image in INSTRUCTION memory is good\n");
5287
5288         return rc;
5289 }
5290
5291
5292 /**
5293  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
5294  *   using sample data 100 bytes apart.  If these sample points are good,
5295  *   it's a pretty good bet that everything between them is good, too.
5296  */
5297 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5298 {
5299         u32 val;
5300         int rc = 0;
5301         u32 errcnt = 0;
5302         u32 i;
5303
5304         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5305
5306         rc = iwl4965_grab_nic_access(priv);
5307         if (rc)
5308                 return rc;
5309
5310         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5311                 /* read data comes through single port, auto-incr addr */
5312                 /* NOTE: Use the debugless read so we don't flood kernel log
5313                  * if IWL_DL_IO is set */
5314                 iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5315                         i + RTC_INST_LOWER_BOUND);
5316                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5317                 if (val != le32_to_cpu(*image)) {
5318 #if 0 /* Enable this if you want to see details */
5319                         IWL_ERROR("uCode INST section is invalid at "
5320                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5321                                   i, val, *image);
5322 #endif
5323                         rc = -EIO;
5324                         errcnt++;
5325                         if (errcnt >= 3)
5326                                 break;
5327                 }
5328         }
5329
5330         iwl4965_release_nic_access(priv);
5331
5332         return rc;
5333 }
5334
5335
5336 /**
5337  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
5338  *    and verify its contents
5339  */
5340 static int iwl4965_verify_ucode(struct iwl_priv *priv)
5341 {
5342         __le32 *image;
5343         u32 len;
5344         int rc = 0;
5345
5346         /* Try bootstrap */
5347         image = (__le32 *)priv->ucode_boot.v_addr;
5348         len = priv->ucode_boot.len;
5349         rc = iwl4965_verify_inst_sparse(priv, image, len);
5350         if (rc == 0) {
5351                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5352                 return 0;
5353         }
5354
5355         /* Try initialize */
5356         image = (__le32 *)priv->ucode_init.v_addr;
5357         len = priv->ucode_init.len;
5358         rc = iwl4965_verify_inst_sparse(priv, image, len);
5359         if (rc == 0) {
5360                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5361                 return 0;
5362         }
5363
5364         /* Try runtime/protocol */
5365         image = (__le32 *)priv->ucode_code.v_addr;
5366         len = priv->ucode_code.len;
5367         rc = iwl4965_verify_inst_sparse(priv, image, len);
5368         if (rc == 0) {
5369                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5370                 return 0;
5371         }
5372
5373         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5374
5375         /* Since nothing seems to match, show first several data entries in
5376          * instruction SRAM, so maybe visual inspection will give a clue.
5377          * Selection of bootstrap image (vs. other images) is arbitrary. */
5378         image = (__le32 *)priv->ucode_boot.v_addr;
5379         len = priv->ucode_boot.len;
5380         rc = iwl4965_verify_inst_full(priv, image, len);
5381
5382         return rc;
5383 }
5384
5385
5386 /* check contents of special bootstrap uCode SRAM */
5387 static int iwl4965_verify_bsm(struct iwl_priv *priv)
5388 {
5389         __le32 *image = priv->ucode_boot.v_addr;
5390         u32 len = priv->ucode_boot.len;
5391         u32 reg;
5392         u32 val;
5393
5394         IWL_DEBUG_INFO("Begin verify bsm\n");
5395
5396         /* verify BSM SRAM contents */
5397         val = iwl4965_read_prph(priv, BSM_WR_DWCOUNT_REG);
5398         for (reg = BSM_SRAM_LOWER_BOUND;
5399              reg < BSM_SRAM_LOWER_BOUND + len;
5400              reg += sizeof(u32), image ++) {
5401                 val = iwl4965_read_prph(priv, reg);
5402                 if (val != le32_to_cpu(*image)) {
5403                         IWL_ERROR("BSM uCode verification failed at "
5404                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5405                                   BSM_SRAM_LOWER_BOUND,
5406                                   reg - BSM_SRAM_LOWER_BOUND, len,
5407                                   val, le32_to_cpu(*image));
5408                         return -EIO;
5409                 }
5410         }
5411
5412         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5413
5414         return 0;
5415 }
5416
5417 /**
5418  * iwl4965_load_bsm - Load bootstrap instructions
5419  *
5420  * BSM operation:
5421  *
5422  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5423  * in special SRAM that does not power down during RFKILL.  When powering back
5424  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5425  * the bootstrap program into the on-board processor, and starts it.
5426  *
5427  * The bootstrap program loads (via DMA) instructions and data for a new
5428  * program from host DRAM locations indicated by the host driver in the
5429  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5430  * automatically.
5431  *
5432  * When initializing the NIC, the host driver points the BSM to the
5433  * "initialize" uCode image.  This uCode sets up some internal data, then
5434  * notifies host via "initialize alive" that it is complete.
5435  *
5436  * The host then replaces the BSM_DRAM_* pointer values to point to the
5437  * normal runtime uCode instructions and a backup uCode data cache buffer
5438  * (filled initially with starting data values for the on-board processor),
5439  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5440  * which begins normal operation.
5441  *
5442  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5443  * the backup data cache in DRAM before SRAM is powered down.
5444  *
5445  * When powering back up, the BSM loads the bootstrap program.  This reloads
5446  * the runtime uCode instructions and the backup data cache into SRAM,
5447  * and re-launches the runtime uCode from where it left off.
5448  */
5449 static int iwl4965_load_bsm(struct iwl_priv *priv)
5450 {
5451         __le32 *image = priv->ucode_boot.v_addr;
5452         u32 len = priv->ucode_boot.len;
5453         dma_addr_t pinst;
5454         dma_addr_t pdata;
5455         u32 inst_len;
5456         u32 data_len;
5457         int rc;
5458         int i;
5459         u32 done;
5460         u32 reg_offset;
5461
5462         IWL_DEBUG_INFO("Begin load bsm\n");
5463
5464         /* make sure bootstrap program is no larger than BSM's SRAM size */
5465         if (len > IWL_MAX_BSM_SIZE)
5466                 return -EINVAL;
5467
5468         /* Tell bootstrap uCode where to find the "Initialize" uCode
5469          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
5470          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
5471          *        after the "initialize" uCode has run, to point to
5472          *        runtime/protocol instructions and backup data cache. */
5473         pinst = priv->ucode_init.p_addr >> 4;
5474         pdata = priv->ucode_init_data.p_addr >> 4;
5475         inst_len = priv->ucode_init.len;
5476         data_len = priv->ucode_init_data.len;
5477
5478         rc = iwl4965_grab_nic_access(priv);
5479         if (rc)
5480                 return rc;
5481
5482         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5483         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5484         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5485         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5486
5487         /* Fill BSM memory with bootstrap instructions */
5488         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5489              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5490              reg_offset += sizeof(u32), image++)
5491                 _iwl4965_write_prph(priv, reg_offset,
5492                                           le32_to_cpu(*image));
5493
5494         rc = iwl4965_verify_bsm(priv);
5495         if (rc) {
5496                 iwl4965_release_nic_access(priv);
5497                 return rc;
5498         }
5499
5500         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5501         iwl4965_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5502         iwl4965_write_prph(priv, BSM_WR_MEM_DST_REG,
5503                                  RTC_INST_LOWER_BOUND);
5504         iwl4965_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5505
5506         /* Load bootstrap code into instruction SRAM now,
5507          *   to prepare to load "initialize" uCode */
5508         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
5509                 BSM_WR_CTRL_REG_BIT_START);
5510
5511         /* Wait for load of bootstrap uCode to finish */
5512         for (i = 0; i < 100; i++) {
5513                 done = iwl4965_read_prph(priv, BSM_WR_CTRL_REG);
5514                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5515                         break;
5516                 udelay(10);
5517         }
5518         if (i < 100)
5519                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5520         else {
5521                 IWL_ERROR("BSM write did not complete!\n");
5522                 return -EIO;
5523         }
5524
5525         /* Enable future boot loads whenever power management unit triggers it
5526          *   (e.g. when powering back up after power-save shutdown) */
5527         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
5528                 BSM_WR_CTRL_REG_BIT_START_EN);
5529
5530         iwl4965_release_nic_access(priv);
5531
5532         return 0;
5533 }
5534
5535 static void iwl4965_nic_start(struct iwl_priv *priv)
5536 {
5537         /* Remove all resets to allow NIC to operate */
5538         iwl4965_write32(priv, CSR_RESET, 0);
5539 }
5540
5541
5542 /**
5543  * iwl4965_read_ucode - Read uCode images from disk file.
5544  *
5545  * Copy into buffers for card to fetch via bus-mastering
5546  */
5547 static int iwl4965_read_ucode(struct iwl_priv *priv)
5548 {
5549         struct iwl4965_ucode *ucode;
5550         int ret;
5551         const struct firmware *ucode_raw;
5552         const char *name = priv->cfg->fw_name;
5553         u8 *src;
5554         size_t len;
5555         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5556
5557         /* Ask kernel firmware_class module to get the boot firmware off disk.
5558          * request_firmware() is synchronous, file is in memory on return. */
5559         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5560         if (ret < 0) {
5561                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5562                                         name, ret);
5563                 goto error;
5564         }
5565
5566         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5567                        name, ucode_raw->size);
5568
5569         /* Make sure that we got at least our header! */
5570         if (ucode_raw->size < sizeof(*ucode)) {
5571                 IWL_ERROR("File size way too small!\n");
5572                 ret = -EINVAL;
5573                 goto err_release;
5574         }
5575
5576         /* Data from ucode file:  header followed by uCode images */
5577         ucode = (void *)ucode_raw->data;
5578
5579         ver = le32_to_cpu(ucode->ver);
5580         inst_size = le32_to_cpu(ucode->inst_size);
5581         data_size = le32_to_cpu(ucode->data_size);
5582         init_size = le32_to_cpu(ucode->init_size);
5583         init_data_size = le32_to_cpu(ucode->init_data_size);
5584         boot_size = le32_to_cpu(ucode->boot_size);
5585
5586         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5587         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5588                        inst_size);
5589         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5590                        data_size);
5591         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5592                        init_size);
5593         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5594                        init_data_size);
5595         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5596                        boot_size);
5597
5598         /* Verify size of file vs. image size info in file's header */
5599         if (ucode_raw->size < sizeof(*ucode) +
5600                 inst_size + data_size + init_size +
5601                 init_data_size + boot_size) {
5602
5603                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5604                                (int)ucode_raw->size);
5605                 ret = -EINVAL;
5606                 goto err_release;
5607         }
5608
5609         /* Verify that uCode images will fit in card's SRAM */
5610         if (inst_size > IWL_MAX_INST_SIZE) {
5611                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5612                                inst_size);
5613                 ret = -EINVAL;
5614                 goto err_release;
5615         }
5616
5617         if (data_size > IWL_MAX_DATA_SIZE) {
5618                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5619                                 data_size);
5620                 ret = -EINVAL;
5621                 goto err_release;
5622         }
5623         if (init_size > IWL_MAX_INST_SIZE) {
5624                 IWL_DEBUG_INFO
5625                     ("uCode init instr len %d too large to fit in\n",
5626                       init_size);
5627                 ret = -EINVAL;
5628                 goto err_release;
5629         }
5630         if (init_data_size > IWL_MAX_DATA_SIZE) {
5631                 IWL_DEBUG_INFO
5632                     ("uCode init data len %d too large to fit in\n",
5633                       init_data_size);
5634                 ret = -EINVAL;
5635                 goto err_release;
5636         }
5637         if (boot_size > IWL_MAX_BSM_SIZE) {
5638                 IWL_DEBUG_INFO
5639                     ("uCode boot instr len %d too large to fit in\n",
5640                       boot_size);
5641                 ret = -EINVAL;
5642                 goto err_release;
5643         }
5644
5645         /* Allocate ucode buffers for card's bus-master loading ... */
5646
5647         /* Runtime instructions and 2 copies of data:
5648          * 1) unmodified from disk
5649          * 2) backup cache for save/restore during power-downs */
5650         priv->ucode_code.len = inst_size;
5651         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5652
5653         priv->ucode_data.len = data_size;
5654         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5655
5656         priv->ucode_data_backup.len = data_size;
5657         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5658
5659         /* Initialization instructions and data */
5660         if (init_size && init_data_size) {
5661                 priv->ucode_init.len = init_size;
5662                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5663
5664                 priv->ucode_init_data.len = init_data_size;
5665                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5666
5667                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5668                         goto err_pci_alloc;
5669         }
5670
5671         /* Bootstrap (instructions only, no data) */
5672         if (boot_size) {
5673                 priv->ucode_boot.len = boot_size;
5674                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5675
5676                 if (!priv->ucode_boot.v_addr)
5677                         goto err_pci_alloc;
5678         }
5679
5680         /* Copy images into buffers for card's bus-master reads ... */
5681
5682         /* Runtime instructions (first block of data in file) */
5683         src = &ucode->data[0];
5684         len = priv->ucode_code.len;
5685         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5686         memcpy(priv->ucode_code.v_addr, src, len);
5687         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5688                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5689
5690         /* Runtime data (2nd block)
5691          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
5692         src = &ucode->data[inst_size];
5693         len = priv->ucode_data.len;
5694         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5695         memcpy(priv->ucode_data.v_addr, src, len);
5696         memcpy(priv->ucode_data_backup.v_addr, src, len);
5697
5698         /* Initialization instructions (3rd block) */
5699         if (init_size) {
5700                 src = &ucode->data[inst_size + data_size];
5701                 len = priv->ucode_init.len;
5702                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5703                                 len);
5704                 memcpy(priv->ucode_init.v_addr, src, len);
5705         }
5706
5707         /* Initialization data (4th block) */
5708         if (init_data_size) {
5709                 src = &ucode->data[inst_size + data_size + init_size];
5710                 len = priv->ucode_init_data.len;
5711                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
5712                                len);
5713                 memcpy(priv->ucode_init_data.v_addr, src, len);
5714         }
5715
5716         /* Bootstrap instructions (5th block) */
5717         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5718         len = priv->ucode_boot.len;
5719         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5720         memcpy(priv->ucode_boot.v_addr, src, len);
5721
5722         /* We have our copies now, allow OS release its copies */
5723         release_firmware(ucode_raw);
5724         return 0;
5725
5726  err_pci_alloc:
5727         IWL_ERROR("failed to allocate pci memory\n");
5728         ret = -ENOMEM;
5729         iwl4965_dealloc_ucode_pci(priv);
5730
5731  err_release:
5732         release_firmware(ucode_raw);
5733
5734  error:
5735         return ret;
5736 }
5737
5738
5739 /**
5740  * iwl4965_set_ucode_ptrs - Set uCode address location
5741  *
5742  * Tell initialization uCode where to find runtime uCode.
5743  *
5744  * BSM registers initially contain pointers to initialization uCode.
5745  * We need to replace them to load runtime uCode inst and data,
5746  * and to save runtime data when powering down.
5747  */
5748 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5749 {
5750         dma_addr_t pinst;
5751         dma_addr_t pdata;
5752         int rc = 0;
5753         unsigned long flags;
5754
5755         /* bits 35:4 for 4965 */
5756         pinst = priv->ucode_code.p_addr >> 4;
5757         pdata = priv->ucode_data_backup.p_addr >> 4;
5758
5759         spin_lock_irqsave(&priv->lock, flags);
5760         rc = iwl4965_grab_nic_access(priv);
5761         if (rc) {
5762                 spin_unlock_irqrestore(&priv->lock, flags);
5763                 return rc;
5764         }
5765
5766         /* Tell bootstrap uCode where to find image to load */
5767         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5768         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5769         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5770                                  priv->ucode_data.len);
5771
5772         /* Inst bytecount must be last to set up, bit 31 signals uCode
5773          *   that all new ptr/size info is in place */
5774         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5775                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5776
5777         iwl4965_release_nic_access(priv);
5778
5779         spin_unlock_irqrestore(&priv->lock, flags);
5780
5781         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5782
5783         return rc;
5784 }
5785
5786 /**
5787  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5788  *
5789  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5790  *
5791  * The 4965 "initialize" ALIVE reply contains calibration data for:
5792  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
5793  *   (3945 does not contain this data).
5794  *
5795  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5796 */
5797 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5798 {
5799         /* Check alive response for "valid" sign from uCode */
5800         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5801                 /* We had an error bringing up the hardware, so take it
5802                  * all the way back down so we can try again */
5803                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5804                 goto restart;
5805         }
5806
5807         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5808          * This is a paranoid check, because we would not have gotten the
5809          * "initialize" alive if code weren't properly loaded.  */
5810         if (iwl4965_verify_ucode(priv)) {
5811                 /* Runtime instruction load was bad;
5812                  * take it all the way back down so we can try again */
5813                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5814                 goto restart;
5815         }
5816
5817         /* Calculate temperature */
5818         priv->temperature = iwl4965_get_temperature(priv);
5819
5820         /* Send pointers to protocol/runtime uCode image ... init code will
5821          * load and launch runtime uCode, which will send us another "Alive"
5822          * notification. */
5823         IWL_DEBUG_INFO("Initialization Alive received.\n");
5824         if (iwl4965_set_ucode_ptrs(priv)) {
5825                 /* Runtime instruction load won't happen;
5826                  * take it all the way back down so we can try again */
5827                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5828                 goto restart;
5829         }
5830         return;
5831
5832  restart:
5833         queue_work(priv->workqueue, &priv->restart);
5834 }
5835
5836
5837 /**
5838  * iwl4965_alive_start - called after REPLY_ALIVE notification received
5839  *                   from protocol/runtime uCode (initialization uCode's
5840  *                   Alive gets handled by iwl4965_init_alive_start()).
5841  */
5842 static void iwl4965_alive_start(struct iwl_priv *priv)
5843 {
5844         int rc = 0;
5845
5846         IWL_DEBUG_INFO("Runtime Alive received.\n");
5847
5848         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5849                 /* We had an error bringing up the hardware, so take it
5850                  * all the way back down so we can try again */
5851                 IWL_DEBUG_INFO("Alive failed.\n");
5852                 goto restart;
5853         }
5854
5855         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5856          * This is a paranoid check, because we would not have gotten the
5857          * "runtime" alive if code weren't properly loaded.  */
5858         if (iwl4965_verify_ucode(priv)) {
5859                 /* Runtime instruction load was bad;
5860                  * take it all the way back down so we can try again */
5861                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5862                 goto restart;
5863         }
5864
5865         iwlcore_clear_stations_table(priv);
5866
5867         rc = iwl4965_alive_notify(priv);
5868         if (rc) {
5869                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5870                             rc);
5871                 goto restart;
5872         }
5873
5874         /* After the ALIVE response, we can send host commands to 4965 uCode */
5875         set_bit(STATUS_ALIVE, &priv->status);
5876
5877         /* Clear out the uCode error bit if it is set */
5878         clear_bit(STATUS_FW_ERROR, &priv->status);
5879
5880         if (iwl4965_is_rfkill(priv))
5881                 return;
5882
5883         ieee80211_start_queues(priv->hw);
5884
5885         priv->active_rate = priv->rates_mask;
5886         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5887
5888         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5889
5890         if (iwl4965_is_associated(priv)) {
5891                 struct iwl4965_rxon_cmd *active_rxon =
5892                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5893
5894                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5895                        sizeof(priv->staging_rxon));
5896                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5897         } else {
5898                 /* Initialize our rx_config data */
5899                 iwl4965_connection_init_rx_config(priv);
5900                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5901         }
5902
5903         /* Configure Bluetooth device coexistence support */
5904         iwl4965_send_bt_config(priv);
5905
5906         /* Configure the adapter for unassociated operation */
5907         iwl4965_commit_rxon(priv);
5908
5909         /* At this point, the NIC is initialized and operational */
5910         priv->notif_missed_beacons = 0;
5911         set_bit(STATUS_READY, &priv->status);
5912
5913         iwl4965_rf_kill_ct_config(priv);
5914
5915         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5916         wake_up_interruptible(&priv->wait_command_queue);
5917
5918         if (priv->error_recovering)
5919                 iwl4965_error_recovery(priv);
5920
5921         return;
5922
5923  restart:
5924         queue_work(priv->workqueue, &priv->restart);
5925 }
5926
5927 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5928
5929 static void __iwl4965_down(struct iwl_priv *priv)
5930 {
5931         unsigned long flags;
5932         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5933         struct ieee80211_conf *conf = NULL;
5934
5935         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5936
5937         conf = ieee80211_get_hw_conf(priv->hw);
5938
5939         if (!exit_pending)
5940                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5941
5942         iwlcore_clear_stations_table(priv);
5943
5944         /* Unblock any waiting calls */
5945         wake_up_interruptible_all(&priv->wait_command_queue);
5946
5947         /* Wipe out the EXIT_PENDING status bit if we are not actually
5948          * exiting the module */
5949         if (!exit_pending)
5950                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5951
5952         /* stop and reset the on-board processor */
5953         iwl4965_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5954
5955         /* tell the device to stop sending interrupts */
5956         iwl4965_disable_interrupts(priv);
5957
5958         if (priv->mac80211_registered)
5959                 ieee80211_stop_queues(priv->hw);
5960
5961         /* If we have not previously called iwl4965_init() then
5962          * clear all bits but the RF Kill and SUSPEND bits and return */
5963         if (!iwl4965_is_init(priv)) {
5964                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5965                                         STATUS_RF_KILL_HW |
5966                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5967                                         STATUS_RF_KILL_SW |
5968                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5969                                         STATUS_GEO_CONFIGURED |
5970                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5971                                         STATUS_IN_SUSPEND;
5972                 goto exit;
5973         }
5974
5975         /* ...otherwise clear out all the status bits but the RF Kill and
5976          * SUSPEND bits and continue taking the NIC down. */
5977         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5978                                 STATUS_RF_KILL_HW |
5979                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5980                                 STATUS_RF_KILL_SW |
5981                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5982                                 STATUS_GEO_CONFIGURED |
5983                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5984                                 STATUS_IN_SUSPEND |
5985                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5986                                 STATUS_FW_ERROR;
5987
5988         spin_lock_irqsave(&priv->lock, flags);
5989         iwl4965_clear_bit(priv, CSR_GP_CNTRL,
5990                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5991         spin_unlock_irqrestore(&priv->lock, flags);
5992
5993         iwl4965_hw_txq_ctx_stop(priv);
5994         iwl4965_hw_rxq_stop(priv);
5995
5996         spin_lock_irqsave(&priv->lock, flags);
5997         if (!iwl4965_grab_nic_access(priv)) {
5998                 iwl4965_write_prph(priv, APMG_CLK_DIS_REG,
5999                                          APMG_CLK_VAL_DMA_CLK_RQT);
6000                 iwl4965_release_nic_access(priv);
6001         }
6002         spin_unlock_irqrestore(&priv->lock, flags);
6003
6004         udelay(5);
6005
6006         iwl4965_hw_nic_stop_master(priv);
6007         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6008         iwl4965_hw_nic_reset(priv);
6009
6010  exit:
6011         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
6012
6013         if (priv->ibss_beacon)
6014                 dev_kfree_skb(priv->ibss_beacon);
6015         priv->ibss_beacon = NULL;
6016
6017         /* clear out any free frames */
6018         iwl4965_clear_free_frames(priv);
6019 }
6020
6021 static void iwl4965_down(struct iwl_priv *priv)
6022 {
6023         mutex_lock(&priv->mutex);
6024         __iwl4965_down(priv);
6025         mutex_unlock(&priv->mutex);
6026
6027         iwl4965_cancel_deferred_work(priv);
6028 }
6029
6030 #define MAX_HW_RESTARTS 5
6031
6032 static int __iwl4965_up(struct iwl_priv *priv)
6033 {
6034         int rc, i;
6035
6036         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6037                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6038                 return -EIO;
6039         }
6040
6041         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6042                 IWL_WARNING("Radio disabled by SW RF kill (module "
6043                             "parameter)\n");
6044                 return -ENODEV;
6045         }
6046
6047         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6048                 IWL_ERROR("ucode not available for device bringup\n");
6049                 return -EIO;
6050         }
6051
6052         /* If platform's RF_KILL switch is NOT set to KILL */
6053         if (iwl4965_read32(priv, CSR_GP_CNTRL) &
6054                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6055                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6056         else {
6057                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6058                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6059                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6060                         return -ENODEV;
6061                 }
6062         }
6063
6064         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6065
6066         rc = iwl4965_hw_nic_init(priv);
6067         if (rc) {
6068                 IWL_ERROR("Unable to int nic\n");
6069                 return rc;
6070         }
6071
6072         /* make sure rfkill handshake bits are cleared */
6073         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6074         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6075                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6076
6077         /* clear (again), then enable host interrupts */
6078         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6079         iwl4965_enable_interrupts(priv);
6080
6081         /* really make sure rfkill handshake bits are cleared */
6082         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6083         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6084
6085         /* Copy original ucode data image from disk into backup cache.
6086          * This will be used to initialize the on-board processor's
6087          * data SRAM for a clean start when the runtime program first loads. */
6088         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6089                priv->ucode_data.len);
6090
6091         /* We return success when we resume from suspend and rf_kill is on. */
6092         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6093                 return 0;
6094
6095         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6096
6097                 iwlcore_clear_stations_table(priv);
6098
6099                 /* load bootstrap state machine,
6100                  * load bootstrap program into processor's memory,
6101                  * prepare to load the "initialize" uCode */
6102                 rc = iwl4965_load_bsm(priv);
6103
6104                 if (rc) {
6105                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6106                         continue;
6107                 }
6108
6109                 /* start card; "initialize" will load runtime ucode */
6110                 iwl4965_nic_start(priv);
6111
6112                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6113
6114                 return 0;
6115         }
6116
6117         set_bit(STATUS_EXIT_PENDING, &priv->status);
6118         __iwl4965_down(priv);
6119
6120         /* tried to restart and config the device for as long as our
6121          * patience could withstand */
6122         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6123         return -EIO;
6124 }
6125
6126
6127 /*****************************************************************************
6128  *
6129  * Workqueue callbacks
6130  *
6131  *****************************************************************************/
6132
6133 static void iwl4965_bg_init_alive_start(struct work_struct *data)
6134 {
6135         struct iwl_priv *priv =
6136             container_of(data, struct iwl_priv, init_alive_start.work);
6137
6138         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6139                 return;
6140
6141         mutex_lock(&priv->mutex);
6142         iwl4965_init_alive_start(priv);
6143         mutex_unlock(&priv->mutex);
6144 }
6145
6146 static void iwl4965_bg_alive_start(struct work_struct *data)
6147 {
6148         struct iwl_priv *priv =
6149             container_of(data, struct iwl_priv, alive_start.work);
6150
6151         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6152                 return;
6153
6154         mutex_lock(&priv->mutex);
6155         iwl4965_alive_start(priv);
6156         mutex_unlock(&priv->mutex);
6157 }
6158
6159 static void iwl4965_bg_rf_kill(struct work_struct *work)
6160 {
6161         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6162
6163         wake_up_interruptible(&priv->wait_command_queue);
6164
6165         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6166                 return;
6167
6168         mutex_lock(&priv->mutex);
6169
6170         if (!iwl4965_is_rfkill(priv)) {
6171                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6172                           "HW and/or SW RF Kill no longer active, restarting "
6173                           "device\n");
6174                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6175                         queue_work(priv->workqueue, &priv->restart);
6176         } else {
6177
6178                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6179                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6180                                           "disabled by SW switch\n");
6181                 else
6182                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6183                                     "Kill switch must be turned off for "
6184                                     "wireless networking to work.\n");
6185         }
6186         mutex_unlock(&priv->mutex);
6187 }
6188
6189 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6190
6191 static void iwl4965_bg_scan_check(struct work_struct *data)
6192 {
6193         struct iwl_priv *priv =
6194             container_of(data, struct iwl_priv, scan_check.work);
6195
6196         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6197                 return;
6198
6199         mutex_lock(&priv->mutex);
6200         if (test_bit(STATUS_SCANNING, &priv->status) ||
6201             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6202                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6203                           "Scan completion watchdog resetting adapter (%dms)\n",
6204                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6205
6206                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6207                         iwl4965_send_scan_abort(priv);
6208         }
6209         mutex_unlock(&priv->mutex);
6210 }
6211
6212 static void iwl4965_bg_request_scan(struct work_struct *data)
6213 {
6214         struct iwl_priv *priv =
6215             container_of(data, struct iwl_priv, request_scan);
6216         struct iwl4965_host_cmd cmd = {
6217                 .id = REPLY_SCAN_CMD,
6218                 .len = sizeof(struct iwl4965_scan_cmd),
6219                 .meta.flags = CMD_SIZE_HUGE,
6220         };
6221         int rc = 0;
6222         struct iwl4965_scan_cmd *scan;
6223         struct ieee80211_conf *conf = NULL;
6224         u16 cmd_len;
6225         enum ieee80211_band band;
6226         u8 direct_mask;
6227
6228         conf = ieee80211_get_hw_conf(priv->hw);
6229
6230         mutex_lock(&priv->mutex);
6231
6232         if (!iwl4965_is_ready(priv)) {
6233                 IWL_WARNING("request scan called when driver not ready.\n");
6234                 goto done;
6235         }
6236
6237         /* Make sure the scan wasn't cancelled before this queued work
6238          * was given the chance to run... */
6239         if (!test_bit(STATUS_SCANNING, &priv->status))
6240                 goto done;
6241
6242         /* This should never be called or scheduled if there is currently
6243          * a scan active in the hardware. */
6244         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6245                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6246                                "Ignoring second request.\n");
6247                 rc = -EIO;
6248                 goto done;
6249         }
6250
6251         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6252                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6253                 goto done;
6254         }
6255
6256         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6257                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6258                 goto done;
6259         }
6260
6261         if (iwl4965_is_rfkill(priv)) {
6262                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6263                 goto done;
6264         }
6265
6266         if (!test_bit(STATUS_READY, &priv->status)) {
6267                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6268                 goto done;
6269         }
6270
6271         if (!priv->scan_bands) {
6272                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6273                 goto done;
6274         }
6275
6276         if (!priv->scan) {
6277                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
6278                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6279                 if (!priv->scan) {
6280                         rc = -ENOMEM;
6281                         goto done;
6282                 }
6283         }
6284         scan = priv->scan;
6285         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
6286
6287         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6288         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6289
6290         if (iwl4965_is_associated(priv)) {
6291                 u16 interval = 0;
6292                 u32 extra;
6293                 u32 suspend_time = 100;
6294                 u32 scan_suspend_time = 100;
6295                 unsigned long flags;
6296
6297                 IWL_DEBUG_INFO("Scanning while associated...\n");
6298
6299                 spin_lock_irqsave(&priv->lock, flags);
6300                 interval = priv->beacon_int;
6301                 spin_unlock_irqrestore(&priv->lock, flags);
6302
6303                 scan->suspend_time = 0;
6304                 scan->max_out_time = cpu_to_le32(200 * 1024);
6305                 if (!interval)
6306                         interval = suspend_time;
6307
6308                 extra = (suspend_time / interval) << 22;
6309                 scan_suspend_time = (extra |
6310                     ((suspend_time % interval) * 1024));
6311                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6312                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6313                                scan_suspend_time, interval);
6314         }
6315
6316         /* We should add the ability for user to lock to PASSIVE ONLY */
6317         if (priv->one_direct_scan) {
6318                 IWL_DEBUG_SCAN
6319                     ("Kicking off one direct scan for '%s'\n",
6320                      iwl4965_escape_essid(priv->direct_ssid,
6321                                       priv->direct_ssid_len));
6322                 scan->direct_scan[0].id = WLAN_EID_SSID;
6323                 scan->direct_scan[0].len = priv->direct_ssid_len;
6324                 memcpy(scan->direct_scan[0].ssid,
6325                        priv->direct_ssid, priv->direct_ssid_len);
6326                 direct_mask = 1;
6327         } else if (!iwl4965_is_associated(priv) && priv->essid_len) {
6328                 scan->direct_scan[0].id = WLAN_EID_SSID;
6329                 scan->direct_scan[0].len = priv->essid_len;
6330                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6331                 direct_mask = 1;
6332         } else
6333                 direct_mask = 0;
6334
6335         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6336         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6337         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6338
6339
6340         switch (priv->scan_bands) {
6341         case 2:
6342                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6343                 scan->tx_cmd.rate_n_flags =
6344                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6345                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6346
6347                 scan->good_CRC_th = 0;
6348                 band = IEEE80211_BAND_2GHZ;
6349                 break;
6350
6351         case 1:
6352                 scan->tx_cmd.rate_n_flags =
6353                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6354                                 RATE_MCS_ANT_B_MSK);
6355                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6356                 band = IEEE80211_BAND_5GHZ;
6357                 break;
6358
6359         default:
6360                 IWL_WARNING("Invalid scan band count\n");
6361                 goto done;
6362         }
6363
6364         /* We don't build a direct scan probe request; the uCode will do
6365          * that based on the direct_mask added to each channel entry */
6366         cmd_len = iwl4965_fill_probe_req(priv, band,
6367                                         (struct ieee80211_mgmt *)scan->data,
6368                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
6369
6370         scan->tx_cmd.len = cpu_to_le16(cmd_len);
6371         /* select Rx chains */
6372
6373         /* Force use of chains B and C (0x6) for scan Rx.
6374          * Avoid A (0x1) because of its off-channel reception on A-band.
6375          * MIMO is not used here, but value is required to make uCode happy. */
6376         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
6377                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
6378                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
6379                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
6380
6381         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6382                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6383
6384         if (direct_mask) {
6385                 IWL_DEBUG_SCAN
6386                     ("Initiating direct scan for %s.\n",
6387                      iwl4965_escape_essid(priv->essid, priv->essid_len));
6388                 scan->channel_count =
6389                         iwl4965_get_channels_for_scan(
6390                                 priv, band, 1, /* active */
6391                                 direct_mask,
6392                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6393         } else {
6394                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6395                 scan->channel_count =
6396                         iwl4965_get_channels_for_scan(
6397                                 priv, band, 0, /* passive */
6398                                 direct_mask,
6399                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6400         }
6401
6402         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6403             scan->channel_count * sizeof(struct iwl4965_scan_channel);
6404         cmd.data = scan;
6405         scan->len = cpu_to_le16(cmd.len);
6406
6407         set_bit(STATUS_SCAN_HW, &priv->status);
6408         rc = iwl4965_send_cmd_sync(priv, &cmd);
6409         if (rc)
6410                 goto done;
6411
6412         queue_delayed_work(priv->workqueue, &priv->scan_check,
6413                            IWL_SCAN_CHECK_WATCHDOG);
6414
6415         mutex_unlock(&priv->mutex);
6416         return;
6417
6418  done:
6419         /* inform mac80211 scan aborted */
6420         queue_work(priv->workqueue, &priv->scan_completed);
6421         mutex_unlock(&priv->mutex);
6422 }
6423
6424 static void iwl4965_bg_up(struct work_struct *data)
6425 {
6426         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6427
6428         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6429                 return;
6430
6431         mutex_lock(&priv->mutex);
6432         __iwl4965_up(priv);
6433         mutex_unlock(&priv->mutex);
6434 }
6435
6436 static void iwl4965_bg_restart(struct work_struct *data)
6437 {
6438         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6439
6440         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6441                 return;
6442
6443         iwl4965_down(priv);
6444         queue_work(priv->workqueue, &priv->up);
6445 }
6446
6447 static void iwl4965_bg_rx_replenish(struct work_struct *data)
6448 {
6449         struct iwl_priv *priv =
6450             container_of(data, struct iwl_priv, rx_replenish);
6451
6452         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6453                 return;
6454
6455         mutex_lock(&priv->mutex);
6456         iwl4965_rx_replenish(priv);
6457         mutex_unlock(&priv->mutex);
6458 }
6459
6460 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6461
6462 static void iwl4965_bg_post_associate(struct work_struct *data)
6463 {
6464         struct iwl_priv *priv = container_of(data, struct iwl_priv,
6465                                              post_associate.work);
6466
6467         int rc = 0;
6468         struct ieee80211_conf *conf = NULL;
6469         DECLARE_MAC_BUF(mac);
6470
6471         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6472                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6473                 return;
6474         }
6475
6476         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6477                         priv->assoc_id,
6478                         print_mac(mac, priv->active_rxon.bssid_addr));
6479
6480
6481         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6482                 return;
6483
6484         mutex_lock(&priv->mutex);
6485
6486         if (!priv->vif || !priv->is_open) {
6487                 mutex_unlock(&priv->mutex);
6488                 return;
6489         }
6490         iwl4965_scan_cancel_timeout(priv, 200);
6491
6492         conf = ieee80211_get_hw_conf(priv->hw);
6493
6494         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6495         iwl4965_commit_rxon(priv);
6496
6497         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6498         iwl4965_setup_rxon_timing(priv);
6499         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6500                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6501         if (rc)
6502                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6503                             "Attempting to continue.\n");
6504
6505         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6506
6507 #ifdef CONFIG_IWL4965_HT
6508         if (priv->current_ht_config.is_ht)
6509                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
6510 #endif /* CONFIG_IWL4965_HT*/
6511         iwl4965_set_rxon_chain(priv);
6512         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6513
6514         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6515                         priv->assoc_id, priv->beacon_int);
6516
6517         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6518                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6519         else
6520                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6521
6522         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6523                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6524                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6525                 else
6526                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6527
6528                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6529                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6530
6531         }
6532
6533         iwl4965_commit_rxon(priv);
6534
6535         switch (priv->iw_mode) {
6536         case IEEE80211_IF_TYPE_STA:
6537                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6538                 break;
6539
6540         case IEEE80211_IF_TYPE_IBSS:
6541
6542                 /* clear out the station table */
6543                 iwlcore_clear_stations_table(priv);
6544
6545                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6546                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6547                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6548                 iwl4965_send_beacon_cmd(priv);
6549
6550                 break;
6551
6552         default:
6553                 IWL_ERROR("%s Should not be called in %d mode\n",
6554                                 __FUNCTION__, priv->iw_mode);
6555                 break;
6556         }
6557
6558         iwl4965_sequence_reset(priv);
6559
6560 #ifdef CONFIG_IWL4965_SENSITIVITY
6561         /* Enable Rx differential gain and sensitivity calibrations */
6562         iwl4965_chain_noise_reset(priv);
6563         priv->start_calib = 1;
6564 #endif /* CONFIG_IWL4965_SENSITIVITY */
6565
6566         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6567                 priv->assoc_station_added = 1;
6568
6569         iwl4965_activate_qos(priv, 0);
6570
6571         /* we have just associated, don't start scan too early */
6572         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6573         mutex_unlock(&priv->mutex);
6574 }
6575
6576 static void iwl4965_bg_abort_scan(struct work_struct *work)
6577 {
6578         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6579
6580         if (!iwl4965_is_ready(priv))
6581                 return;
6582
6583         mutex_lock(&priv->mutex);
6584
6585         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6586         iwl4965_send_scan_abort(priv);
6587
6588         mutex_unlock(&priv->mutex);
6589 }
6590
6591 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6592
6593 static void iwl4965_bg_scan_completed(struct work_struct *work)
6594 {
6595         struct iwl_priv *priv =
6596             container_of(work, struct iwl_priv, scan_completed);
6597
6598         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6599
6600         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6601                 return;
6602
6603         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6604                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6605
6606         ieee80211_scan_completed(priv->hw);
6607
6608         /* Since setting the TXPOWER may have been deferred while
6609          * performing the scan, fire one off */
6610         mutex_lock(&priv->mutex);
6611         iwl4965_hw_reg_send_txpower(priv);
6612         mutex_unlock(&priv->mutex);
6613 }
6614
6615 /*****************************************************************************
6616  *
6617  * mac80211 entry point functions
6618  *
6619  *****************************************************************************/
6620
6621 #define UCODE_READY_TIMEOUT     (2 * HZ)
6622
6623 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6624 {
6625         struct iwl_priv *priv = hw->priv;
6626         int ret;
6627
6628         IWL_DEBUG_MAC80211("enter\n");
6629
6630         if (pci_enable_device(priv->pci_dev)) {
6631                 IWL_ERROR("Fail to pci_enable_device\n");
6632                 return -ENODEV;
6633         }
6634         pci_restore_state(priv->pci_dev);
6635         pci_enable_msi(priv->pci_dev);
6636
6637         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
6638                           DRV_NAME, priv);
6639         if (ret) {
6640                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6641                 goto out_disable_msi;
6642         }
6643
6644         /* we should be verifying the device is ready to be opened */
6645         mutex_lock(&priv->mutex);
6646
6647         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
6648         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6649          * ucode filename and max sizes are card-specific. */
6650
6651         if (!priv->ucode_code.len) {
6652                 ret = iwl4965_read_ucode(priv);
6653                 if (ret) {
6654                         IWL_ERROR("Could not read microcode: %d\n", ret);
6655                         mutex_unlock(&priv->mutex);
6656                         goto out_release_irq;
6657                 }
6658         }
6659
6660         ret = __iwl4965_up(priv);
6661
6662         mutex_unlock(&priv->mutex);
6663
6664         if (ret)
6665                 goto out_release_irq;
6666
6667         IWL_DEBUG_INFO("Start UP work done.\n");
6668
6669         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6670                 return 0;
6671
6672         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6673          * mac80211 will not be run successfully. */
6674         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6675                         test_bit(STATUS_READY, &priv->status),
6676                         UCODE_READY_TIMEOUT);
6677         if (!ret) {
6678                 if (!test_bit(STATUS_READY, &priv->status)) {
6679                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6680                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6681                         ret = -ETIMEDOUT;
6682                         goto out_release_irq;
6683                 }
6684         }
6685
6686         priv->is_open = 1;
6687         IWL_DEBUG_MAC80211("leave\n");
6688         return 0;
6689
6690 out_release_irq:
6691         free_irq(priv->pci_dev->irq, priv);
6692 out_disable_msi:
6693         pci_disable_msi(priv->pci_dev);
6694         pci_disable_device(priv->pci_dev);
6695         priv->is_open = 0;
6696         IWL_DEBUG_MAC80211("leave - failed\n");
6697         return ret;
6698 }
6699
6700 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6701 {
6702         struct iwl_priv *priv = hw->priv;
6703
6704         IWL_DEBUG_MAC80211("enter\n");
6705
6706         if (!priv->is_open) {
6707                 IWL_DEBUG_MAC80211("leave - skip\n");
6708                 return;
6709         }
6710
6711         priv->is_open = 0;
6712
6713         if (iwl4965_is_ready_rf(priv)) {
6714                 /* stop mac, cancel any scan request and clear
6715                  * RXON_FILTER_ASSOC_MSK BIT
6716                  */
6717                 mutex_lock(&priv->mutex);
6718                 iwl4965_scan_cancel_timeout(priv, 100);
6719                 cancel_delayed_work(&priv->post_associate);
6720                 mutex_unlock(&priv->mutex);
6721         }
6722
6723         iwl4965_down(priv);
6724
6725         flush_workqueue(priv->workqueue);
6726         free_irq(priv->pci_dev->irq, priv);
6727         pci_disable_msi(priv->pci_dev);
6728         pci_save_state(priv->pci_dev);
6729         pci_disable_device(priv->pci_dev);
6730
6731         IWL_DEBUG_MAC80211("leave\n");
6732 }
6733
6734 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6735                       struct ieee80211_tx_control *ctl)
6736 {
6737         struct iwl_priv *priv = hw->priv;
6738
6739         IWL_DEBUG_MAC80211("enter\n");
6740
6741         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6742                 IWL_DEBUG_MAC80211("leave - monitor\n");
6743                 return -1;
6744         }
6745
6746         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6747                      ctl->tx_rate->bitrate);
6748
6749         if (iwl4965_tx_skb(priv, skb, ctl))
6750                 dev_kfree_skb_any(skb);
6751
6752         IWL_DEBUG_MAC80211("leave\n");
6753         return 0;
6754 }
6755
6756 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6757                                  struct ieee80211_if_init_conf *conf)
6758 {
6759         struct iwl_priv *priv = hw->priv;
6760         unsigned long flags;
6761         DECLARE_MAC_BUF(mac);
6762
6763         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6764
6765         if (priv->vif) {
6766                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6767                 return -EOPNOTSUPP;
6768         }
6769
6770         spin_lock_irqsave(&priv->lock, flags);
6771         priv->vif = conf->vif;
6772
6773         spin_unlock_irqrestore(&priv->lock, flags);
6774
6775         mutex_lock(&priv->mutex);
6776
6777         if (conf->mac_addr) {
6778                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6779                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6780         }
6781
6782         if (iwl4965_is_ready(priv))
6783                 iwl4965_set_mode(priv, conf->type);
6784
6785         mutex_unlock(&priv->mutex);
6786
6787         IWL_DEBUG_MAC80211("leave\n");
6788         return 0;
6789 }
6790
6791 /**
6792  * iwl4965_mac_config - mac80211 config callback
6793  *
6794  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6795  * be set inappropriately and the driver currently sets the hardware up to
6796  * use it whenever needed.
6797  */
6798 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6799 {
6800         struct iwl_priv *priv = hw->priv;
6801         const struct iwl_channel_info *ch_info;
6802         unsigned long flags;
6803         int ret = 0;
6804
6805         mutex_lock(&priv->mutex);
6806         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6807
6808         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6809
6810         if (!iwl4965_is_ready(priv)) {
6811                 IWL_DEBUG_MAC80211("leave - not ready\n");
6812                 ret = -EIO;
6813                 goto out;
6814         }
6815
6816         if (unlikely(!iwl4965_mod_params.disable_hw_scan &&
6817                      test_bit(STATUS_SCANNING, &priv->status))) {
6818                 IWL_DEBUG_MAC80211("leave - scanning\n");
6819                 set_bit(STATUS_CONF_PENDING, &priv->status);
6820                 mutex_unlock(&priv->mutex);
6821                 return 0;
6822         }
6823
6824         spin_lock_irqsave(&priv->lock, flags);
6825
6826         ch_info = iwl4965_get_channel_info(priv, conf->channel->band,
6827                         ieee80211_frequency_to_channel(conf->channel->center_freq));
6828         if (!is_channel_valid(ch_info)) {
6829                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6830                 spin_unlock_irqrestore(&priv->lock, flags);
6831                 ret = -EINVAL;
6832                 goto out;
6833         }
6834
6835 #ifdef CONFIG_IWL4965_HT
6836         /* if we are switching from ht to 2.4 clear flags
6837          * from any ht related info since 2.4 does not
6838          * support ht */
6839         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6840 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6841             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6842 #endif
6843         )
6844                 priv->staging_rxon.flags = 0;
6845 #endif /* CONFIG_IWL4965_HT */
6846
6847         iwlcore_set_rxon_channel(priv, conf->channel->band,
6848                 ieee80211_frequency_to_channel(conf->channel->center_freq));
6849
6850         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6851
6852         /* The list of supported rates and rate mask can be different
6853          * for each band; since the band may have changed, reset
6854          * the rate mask to what mac80211 lists */
6855         iwl4965_set_rate(priv);
6856
6857         spin_unlock_irqrestore(&priv->lock, flags);
6858
6859 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6860         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6861                 iwl4965_hw_channel_switch(priv, conf->channel);
6862                 goto out;
6863         }
6864 #endif
6865
6866         iwl4965_radio_kill_sw(priv, !conf->radio_enabled);
6867
6868         if (!conf->radio_enabled) {
6869                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6870                 goto out;
6871         }
6872
6873         if (iwl4965_is_rfkill(priv)) {
6874                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6875                 ret = -EIO;
6876                 goto out;
6877         }
6878
6879         iwl4965_set_rate(priv);
6880
6881         if (memcmp(&priv->active_rxon,
6882                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6883                 iwl4965_commit_rxon(priv);
6884         else
6885                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6886
6887         IWL_DEBUG_MAC80211("leave\n");
6888
6889 out:
6890         clear_bit(STATUS_CONF_PENDING, &priv->status);
6891         mutex_unlock(&priv->mutex);
6892         return ret;
6893 }
6894
6895 static void iwl4965_config_ap(struct iwl_priv *priv)
6896 {
6897         int rc = 0;
6898
6899         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6900                 return;
6901
6902         /* The following should be done only at AP bring up */
6903         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6904
6905                 /* RXON - unassoc (to set timing command) */
6906                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6907                 iwl4965_commit_rxon(priv);
6908
6909                 /* RXON Timing */
6910                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6911                 iwl4965_setup_rxon_timing(priv);
6912                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6913                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6914                 if (rc)
6915                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6916                                         "Attempting to continue.\n");
6917
6918                 iwl4965_set_rxon_chain(priv);
6919
6920                 /* FIXME: what should be the assoc_id for AP? */
6921                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6922                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6923                         priv->staging_rxon.flags |=
6924                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6925                 else
6926                         priv->staging_rxon.flags &=
6927                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6928
6929                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6930                         if (priv->assoc_capability &
6931                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6932                                 priv->staging_rxon.flags |=
6933                                         RXON_FLG_SHORT_SLOT_MSK;
6934                         else
6935                                 priv->staging_rxon.flags &=
6936                                         ~RXON_FLG_SHORT_SLOT_MSK;
6937
6938                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6939                                 priv->staging_rxon.flags &=
6940                                         ~RXON_FLG_SHORT_SLOT_MSK;
6941                 }
6942                 /* restore RXON assoc */
6943                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6944                 iwl4965_commit_rxon(priv);
6945                 iwl4965_activate_qos(priv, 1);
6946                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6947         }
6948         iwl4965_send_beacon_cmd(priv);
6949
6950         /* FIXME - we need to add code here to detect a totally new
6951          * configuration, reset the AP, unassoc, rxon timing, assoc,
6952          * clear sta table, add BCAST sta... */
6953 }
6954
6955 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6956                                         struct ieee80211_vif *vif,
6957                                     struct ieee80211_if_conf *conf)
6958 {
6959         struct iwl_priv *priv = hw->priv;
6960         DECLARE_MAC_BUF(mac);
6961         unsigned long flags;
6962         int rc;
6963
6964         if (conf == NULL)
6965                 return -EIO;
6966
6967         if (priv->vif != vif) {
6968                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6969                 mutex_unlock(&priv->mutex);
6970                 return 0;
6971         }
6972
6973         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6974             (!conf->beacon || !conf->ssid_len)) {
6975                 IWL_DEBUG_MAC80211
6976                     ("Leaving in AP mode because HostAPD is not ready.\n");
6977                 return 0;
6978         }
6979
6980         if (!iwl4965_is_alive(priv))
6981                 return -EAGAIN;
6982
6983         mutex_lock(&priv->mutex);
6984
6985         if (conf->bssid)
6986                 IWL_DEBUG_MAC80211("bssid: %s\n",
6987                                    print_mac(mac, conf->bssid));
6988
6989 /*
6990  * very dubious code was here; the probe filtering flag is never set:
6991  *
6992         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6993             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6994  */
6995
6996         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6997                 if (!conf->bssid) {
6998                         conf->bssid = priv->mac_addr;
6999                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7000                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7001                                            print_mac(mac, conf->bssid));
7002                 }
7003                 if (priv->ibss_beacon)
7004                         dev_kfree_skb(priv->ibss_beacon);
7005
7006                 priv->ibss_beacon = conf->beacon;
7007         }
7008
7009         if (iwl4965_is_rfkill(priv))
7010                 goto done;
7011
7012         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7013             !is_multicast_ether_addr(conf->bssid)) {
7014                 /* If there is currently a HW scan going on in the background
7015                  * then we need to cancel it else the RXON below will fail. */
7016                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
7017                         IWL_WARNING("Aborted scan still in progress "
7018                                     "after 100ms\n");
7019                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7020                         mutex_unlock(&priv->mutex);
7021                         return -EAGAIN;
7022                 }
7023                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7024
7025                 /* TODO: Audit driver for usage of these members and see
7026                  * if mac80211 deprecates them (priv->bssid looks like it
7027                  * shouldn't be there, but I haven't scanned the IBSS code
7028                  * to verify) - jpk */
7029                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7030
7031                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7032                         iwl4965_config_ap(priv);
7033                 else {
7034                         rc = iwl4965_commit_rxon(priv);
7035                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7036                                 iwl4965_rxon_add_station(
7037                                         priv, priv->active_rxon.bssid_addr, 1);
7038                 }
7039
7040         } else {
7041                 iwl4965_scan_cancel_timeout(priv, 100);
7042                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7043                 iwl4965_commit_rxon(priv);
7044         }
7045
7046  done:
7047         spin_lock_irqsave(&priv->lock, flags);
7048         if (!conf->ssid_len)
7049                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7050         else
7051                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7052
7053         priv->essid_len = conf->ssid_len;
7054         spin_unlock_irqrestore(&priv->lock, flags);
7055
7056         IWL_DEBUG_MAC80211("leave\n");
7057         mutex_unlock(&priv->mutex);
7058
7059         return 0;
7060 }
7061
7062 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
7063                                  unsigned int changed_flags,
7064                                  unsigned int *total_flags,
7065                                  int mc_count, struct dev_addr_list *mc_list)
7066 {
7067         /*
7068          * XXX: dummy
7069          * see also iwl4965_connection_init_rx_config
7070          */
7071         *total_flags = 0;
7072 }
7073
7074 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
7075                                      struct ieee80211_if_init_conf *conf)
7076 {
7077         struct iwl_priv *priv = hw->priv;
7078
7079         IWL_DEBUG_MAC80211("enter\n");
7080
7081         mutex_lock(&priv->mutex);
7082
7083         if (iwl4965_is_ready_rf(priv)) {
7084                 iwl4965_scan_cancel_timeout(priv, 100);
7085                 cancel_delayed_work(&priv->post_associate);
7086                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7087                 iwl4965_commit_rxon(priv);
7088         }
7089         if (priv->vif == conf->vif) {
7090                 priv->vif = NULL;
7091                 memset(priv->bssid, 0, ETH_ALEN);
7092                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7093                 priv->essid_len = 0;
7094         }
7095         mutex_unlock(&priv->mutex);
7096
7097         IWL_DEBUG_MAC80211("leave\n");
7098
7099 }
7100
7101 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
7102                                      struct ieee80211_vif *vif,
7103                                      struct ieee80211_bss_conf *bss_conf,
7104                                      u32 changes)
7105 {
7106         struct iwl_priv *priv = hw->priv;
7107
7108         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
7109                 if (bss_conf->use_short_preamble)
7110                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7111                 else
7112                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7113         }
7114
7115         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
7116                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
7117                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7118                 else
7119                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7120         }
7121
7122         if (changes & BSS_CHANGED_ASSOC) {
7123                 /*
7124                  * TODO:
7125                  * do stuff instead of sniffing assoc resp
7126                  */
7127         }
7128
7129         if (iwl4965_is_associated(priv))
7130                 iwl4965_send_rxon_assoc(priv);
7131 }
7132
7133 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7134 {
7135         int rc = 0;
7136         unsigned long flags;
7137         struct iwl_priv *priv = hw->priv;
7138
7139         IWL_DEBUG_MAC80211("enter\n");
7140
7141         mutex_lock(&priv->mutex);
7142         spin_lock_irqsave(&priv->lock, flags);
7143
7144         if (!iwl4965_is_ready_rf(priv)) {
7145                 rc = -EIO;
7146                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7147                 goto out_unlock;
7148         }
7149
7150         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7151                 rc = -EIO;
7152                 IWL_ERROR("ERROR: APs don't scan\n");
7153                 goto out_unlock;
7154         }
7155
7156         /* we don't schedule scan within next_scan_jiffies period */
7157         if (priv->next_scan_jiffies &&
7158                         time_after(priv->next_scan_jiffies, jiffies)) {
7159                 rc = -EAGAIN;
7160                 goto out_unlock;
7161         }
7162         /* if we just finished scan ask for delay */
7163         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7164                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7165                 rc = -EAGAIN;
7166                 goto out_unlock;
7167         }
7168         if (len) {
7169                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7170                                iwl4965_escape_essid(ssid, len), (int)len);
7171
7172                 priv->one_direct_scan = 1;
7173                 priv->direct_ssid_len = (u8)
7174                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7175                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7176         } else
7177                 priv->one_direct_scan = 0;
7178
7179         rc = iwl4965_scan_initiate(priv);
7180
7181         IWL_DEBUG_MAC80211("leave\n");
7182
7183 out_unlock:
7184         spin_unlock_irqrestore(&priv->lock, flags);
7185         mutex_unlock(&priv->mutex);
7186
7187         return rc;
7188 }
7189
7190 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
7191                         struct ieee80211_key_conf *keyconf, const u8 *addr,
7192                         u32 iv32, u16 *phase1key)
7193 {
7194         struct iwl_priv *priv = hw->priv;
7195         u8 sta_id = IWL_INVALID_STATION;
7196         unsigned long flags;
7197         __le16 key_flags = 0;
7198         int i;
7199         DECLARE_MAC_BUF(mac);
7200
7201         IWL_DEBUG_MAC80211("enter\n");
7202
7203         sta_id = iwl4965_hw_find_station(priv, addr);
7204         if (sta_id == IWL_INVALID_STATION) {
7205                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7206                                    print_mac(mac, addr));
7207                 return;
7208         }
7209
7210         iwl4965_scan_cancel_timeout(priv, 100);
7211
7212         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
7213         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
7214         key_flags &= ~STA_KEY_FLG_INVALID;
7215
7216         if (sta_id == priv->hw_setting.bcast_sta_id)
7217                 key_flags |= STA_KEY_MULTICAST_MSK;
7218
7219         spin_lock_irqsave(&priv->sta_lock, flags);
7220
7221         priv->stations[sta_id].sta.key.key_offset =
7222                                         (sta_id % STA_KEY_MAX_NUM);/* FIXME */
7223         priv->stations[sta_id].sta.key.key_flags = key_flags;
7224         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
7225
7226         for (i = 0; i < 5; i++)
7227                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
7228                         cpu_to_le16(phase1key[i]);
7229
7230         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
7231         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
7232
7233         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
7234
7235         spin_unlock_irqrestore(&priv->sta_lock, flags);
7236
7237         IWL_DEBUG_MAC80211("leave\n");
7238 }
7239
7240 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7241                            const u8 *local_addr, const u8 *addr,
7242                            struct ieee80211_key_conf *key)
7243 {
7244         struct iwl_priv *priv = hw->priv;
7245         DECLARE_MAC_BUF(mac);
7246         int ret = 0;
7247         u8 sta_id = IWL_INVALID_STATION;
7248         u8 static_key;
7249
7250         IWL_DEBUG_MAC80211("enter\n");
7251
7252         if (!iwl4965_mod_params.hw_crypto) {
7253                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7254                 return -EOPNOTSUPP;
7255         }
7256
7257         if (is_zero_ether_addr(addr))
7258                 /* only support pairwise keys */
7259                 return -EOPNOTSUPP;
7260
7261         /* FIXME: need to differenciate between static and dynamic key
7262          * in the level of mac80211 */
7263         static_key = !iwl4965_is_associated(priv);
7264
7265         if (!static_key) {
7266                 sta_id = iwl4965_hw_find_station(priv, addr);
7267                 if (sta_id == IWL_INVALID_STATION) {
7268                         IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7269                                            print_mac(mac, addr));
7270                         return -EINVAL;
7271                 }
7272         }
7273
7274         iwl4965_scan_cancel_timeout(priv, 100);
7275
7276         switch (cmd) {
7277         case SET_KEY:
7278                 if (static_key)
7279                         ret = iwl4965_set_static_key(priv, key);
7280                 else
7281                         ret = iwl4965_set_dynamic_key(priv, key, sta_id);
7282
7283                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
7284                 break;
7285         case DISABLE_KEY:
7286                 if (static_key)
7287                         ret = iwl4965_remove_static_key(priv);
7288                 else
7289                         ret = iwl4965_clear_sta_key_info(priv, sta_id);
7290
7291                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7292                 break;
7293         default:
7294                 ret = -EINVAL;
7295         }
7296
7297         IWL_DEBUG_MAC80211("leave\n");
7298
7299         return ret;
7300 }
7301
7302 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7303                            const struct ieee80211_tx_queue_params *params)
7304 {
7305         struct iwl_priv *priv = hw->priv;
7306         unsigned long flags;
7307         int q;
7308
7309         IWL_DEBUG_MAC80211("enter\n");
7310
7311         if (!iwl4965_is_ready_rf(priv)) {
7312                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7313                 return -EIO;
7314         }
7315
7316         if (queue >= AC_NUM) {
7317                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7318                 return 0;
7319         }
7320
7321         if (!priv->qos_data.qos_enable) {
7322                 priv->qos_data.qos_active = 0;
7323                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7324                 return 0;
7325         }
7326         q = AC_NUM - 1 - queue;
7327
7328         spin_lock_irqsave(&priv->lock, flags);
7329
7330         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7331         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7332         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7333         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7334                         cpu_to_le16((params->txop * 32));
7335
7336         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7337         priv->qos_data.qos_active = 1;
7338
7339         spin_unlock_irqrestore(&priv->lock, flags);
7340
7341         mutex_lock(&priv->mutex);
7342         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7343                 iwl4965_activate_qos(priv, 1);
7344         else if (priv->assoc_id && iwl4965_is_associated(priv))
7345                 iwl4965_activate_qos(priv, 0);
7346
7347         mutex_unlock(&priv->mutex);
7348
7349         IWL_DEBUG_MAC80211("leave\n");
7350         return 0;
7351 }
7352
7353 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
7354                                 struct ieee80211_tx_queue_stats *stats)
7355 {
7356         struct iwl_priv *priv = hw->priv;
7357         int i, avail;
7358         struct iwl4965_tx_queue *txq;
7359         struct iwl4965_queue *q;
7360         unsigned long flags;
7361
7362         IWL_DEBUG_MAC80211("enter\n");
7363
7364         if (!iwl4965_is_ready_rf(priv)) {
7365                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7366                 return -EIO;
7367         }
7368
7369         spin_lock_irqsave(&priv->lock, flags);
7370
7371         for (i = 0; i < AC_NUM; i++) {
7372                 txq = &priv->txq[i];
7373                 q = &txq->q;
7374                 avail = iwl4965_queue_space(q);
7375
7376                 stats->data[i].len = q->n_window - avail;
7377                 stats->data[i].limit = q->n_window - q->high_mark;
7378                 stats->data[i].count = q->n_window;
7379
7380         }
7381         spin_unlock_irqrestore(&priv->lock, flags);
7382
7383         IWL_DEBUG_MAC80211("leave\n");
7384
7385         return 0;
7386 }
7387
7388 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
7389                              struct ieee80211_low_level_stats *stats)
7390 {
7391         IWL_DEBUG_MAC80211("enter\n");
7392         IWL_DEBUG_MAC80211("leave\n");
7393
7394         return 0;
7395 }
7396
7397 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
7398 {
7399         IWL_DEBUG_MAC80211("enter\n");
7400         IWL_DEBUG_MAC80211("leave\n");
7401
7402         return 0;
7403 }
7404
7405 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7406 {
7407         struct iwl_priv *priv = hw->priv;
7408         unsigned long flags;
7409
7410         mutex_lock(&priv->mutex);
7411         IWL_DEBUG_MAC80211("enter\n");
7412
7413         priv->lq_mngr.lq_ready = 0;
7414 #ifdef CONFIG_IWL4965_HT
7415         spin_lock_irqsave(&priv->lock, flags);
7416         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7417         spin_unlock_irqrestore(&priv->lock, flags);
7418 #endif /* CONFIG_IWL4965_HT */
7419
7420         iwlcore_reset_qos(priv);
7421
7422         cancel_delayed_work(&priv->post_associate);
7423
7424         spin_lock_irqsave(&priv->lock, flags);
7425         priv->assoc_id = 0;
7426         priv->assoc_capability = 0;
7427         priv->call_post_assoc_from_beacon = 0;
7428         priv->assoc_station_added = 0;
7429
7430         /* new association get rid of ibss beacon skb */
7431         if (priv->ibss_beacon)
7432                 dev_kfree_skb(priv->ibss_beacon);
7433
7434         priv->ibss_beacon = NULL;
7435
7436         priv->beacon_int = priv->hw->conf.beacon_int;
7437         priv->timestamp1 = 0;
7438         priv->timestamp0 = 0;
7439         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7440                 priv->beacon_int = 0;
7441
7442         spin_unlock_irqrestore(&priv->lock, flags);
7443
7444         if (!iwl4965_is_ready_rf(priv)) {
7445                 IWL_DEBUG_MAC80211("leave - not ready\n");
7446                 mutex_unlock(&priv->mutex);
7447                 return;
7448         }
7449
7450         /* we are restarting association process
7451          * clear RXON_FILTER_ASSOC_MSK bit
7452          */
7453         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7454                 iwl4965_scan_cancel_timeout(priv, 100);
7455                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7456                 iwl4965_commit_rxon(priv);
7457         }
7458
7459         /* Per mac80211.h: This is only used in IBSS mode... */
7460         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7461
7462                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7463                 mutex_unlock(&priv->mutex);
7464                 return;
7465         }
7466
7467         priv->only_active_channel = 0;
7468
7469         iwl4965_set_rate(priv);
7470
7471         mutex_unlock(&priv->mutex);
7472
7473         IWL_DEBUG_MAC80211("leave\n");
7474 }
7475
7476 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7477                                  struct ieee80211_tx_control *control)
7478 {
7479         struct iwl_priv *priv = hw->priv;
7480         unsigned long flags;
7481
7482         mutex_lock(&priv->mutex);
7483         IWL_DEBUG_MAC80211("enter\n");
7484
7485         if (!iwl4965_is_ready_rf(priv)) {
7486                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7487                 mutex_unlock(&priv->mutex);
7488                 return -EIO;
7489         }
7490
7491         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7492                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7493                 mutex_unlock(&priv->mutex);
7494                 return -EIO;
7495         }
7496
7497         spin_lock_irqsave(&priv->lock, flags);
7498
7499         if (priv->ibss_beacon)
7500                 dev_kfree_skb(priv->ibss_beacon);
7501
7502         priv->ibss_beacon = skb;
7503
7504         priv->assoc_id = 0;
7505
7506         IWL_DEBUG_MAC80211("leave\n");
7507         spin_unlock_irqrestore(&priv->lock, flags);
7508
7509         iwlcore_reset_qos(priv);
7510
7511         queue_work(priv->workqueue, &priv->post_associate.work);
7512
7513         mutex_unlock(&priv->mutex);
7514
7515         return 0;
7516 }
7517
7518 #ifdef CONFIG_IWL4965_HT
7519
7520 static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
7521                                  struct iwl_priv *priv)
7522 {
7523         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
7524         struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
7525         struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
7526
7527         IWL_DEBUG_MAC80211("enter: \n");
7528
7529         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
7530                 iwl_conf->is_ht = 0;
7531                 return;
7532         }
7533
7534         iwl_conf->is_ht = 1;
7535         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
7536
7537         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
7538                 iwl_conf->sgf |= 0x1;
7539         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
7540                 iwl_conf->sgf |= 0x2;
7541
7542         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
7543         iwl_conf->max_amsdu_size =
7544                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
7545
7546         iwl_conf->supported_chan_width =
7547                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
7548         iwl_conf->extension_chan_offset =
7549                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
7550         /* If no above or below channel supplied disable FAT channel */
7551         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
7552             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
7553                 iwl_conf->supported_chan_width = 0;
7554
7555         iwl_conf->tx_mimo_ps_mode =
7556                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
7557         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
7558
7559         iwl_conf->control_channel = ht_bss_conf->primary_channel;
7560         iwl_conf->tx_chan_width =
7561                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
7562         iwl_conf->ht_protection =
7563                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
7564         iwl_conf->non_GF_STA_present =
7565                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
7566
7567         IWL_DEBUG_MAC80211("control channel %d\n",
7568                 iwl_conf->control_channel);
7569         IWL_DEBUG_MAC80211("leave\n");
7570 }
7571
7572 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
7573                                struct ieee80211_conf *conf)
7574 {
7575         struct iwl_priv *priv = hw->priv;
7576
7577         IWL_DEBUG_MAC80211("enter: \n");
7578
7579         iwl4965_ht_info_fill(conf, priv);
7580         iwl4965_set_rxon_chain(priv);
7581
7582         if (priv && priv->assoc_id &&
7583             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
7584                 unsigned long flags;
7585
7586                 spin_lock_irqsave(&priv->lock, flags);
7587                 if (priv->beacon_int)
7588                         queue_work(priv->workqueue, &priv->post_associate.work);
7589                 else
7590                         priv->call_post_assoc_from_beacon = 1;
7591                 spin_unlock_irqrestore(&priv->lock, flags);
7592         }
7593
7594         IWL_DEBUG_MAC80211("leave:\n");
7595         return 0;
7596 }
7597
7598 #endif /*CONFIG_IWL4965_HT*/
7599
7600 /*****************************************************************************
7601  *
7602  * sysfs attributes
7603  *
7604  *****************************************************************************/
7605
7606 #ifdef CONFIG_IWLWIFI_DEBUG
7607
7608 /*
7609  * The following adds a new attribute to the sysfs representation
7610  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7611  * used for controlling the debug level.
7612  *
7613  * See the level definitions in iwl for details.
7614  */
7615
7616 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7617 {
7618         return sprintf(buf, "0x%08X\n", iwl_debug_level);
7619 }
7620 static ssize_t store_debug_level(struct device_driver *d,
7621                                  const char *buf, size_t count)
7622 {
7623         char *p = (char *)buf;
7624         u32 val;
7625
7626         val = simple_strtoul(p, &p, 0);
7627         if (p == buf)
7628                 printk(KERN_INFO DRV_NAME
7629                        ": %s is not in hex or decimal form.\n", buf);
7630         else
7631                 iwl_debug_level = val;
7632
7633         return strnlen(buf, count);
7634 }
7635
7636 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7637                    show_debug_level, store_debug_level);
7638
7639 #endif /* CONFIG_IWLWIFI_DEBUG */
7640
7641 static ssize_t show_rf_kill(struct device *d,
7642                             struct device_attribute *attr, char *buf)
7643 {
7644         /*
7645          * 0 - RF kill not enabled
7646          * 1 - SW based RF kill active (sysfs)
7647          * 2 - HW based RF kill active
7648          * 3 - Both HW and SW based RF kill active
7649          */
7650         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7651         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7652                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7653
7654         return sprintf(buf, "%i\n", val);
7655 }
7656
7657 static ssize_t store_rf_kill(struct device *d,
7658                              struct device_attribute *attr,
7659                              const char *buf, size_t count)
7660 {
7661         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7662
7663         mutex_lock(&priv->mutex);
7664         iwl4965_radio_kill_sw(priv, buf[0] == '1');
7665         mutex_unlock(&priv->mutex);
7666
7667         return count;
7668 }
7669
7670 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7671
7672 static ssize_t show_temperature(struct device *d,
7673                                 struct device_attribute *attr, char *buf)
7674 {
7675         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7676
7677         if (!iwl4965_is_alive(priv))
7678                 return -EAGAIN;
7679
7680         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7681 }
7682
7683 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7684
7685 static ssize_t show_rs_window(struct device *d,
7686                               struct device_attribute *attr,
7687                               char *buf)
7688 {
7689         struct iwl_priv *priv = d->driver_data;
7690         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7691 }
7692 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7693
7694 static ssize_t show_tx_power(struct device *d,
7695                              struct device_attribute *attr, char *buf)
7696 {
7697         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7698         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7699 }
7700
7701 static ssize_t store_tx_power(struct device *d,
7702                               struct device_attribute *attr,
7703                               const char *buf, size_t count)
7704 {
7705         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7706         char *p = (char *)buf;
7707         u32 val;
7708
7709         val = simple_strtoul(p, &p, 10);
7710         if (p == buf)
7711                 printk(KERN_INFO DRV_NAME
7712                        ": %s is not in decimal form.\n", buf);
7713         else
7714                 iwl4965_hw_reg_set_txpower(priv, val);
7715
7716         return count;
7717 }
7718
7719 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7720
7721 static ssize_t show_flags(struct device *d,
7722                           struct device_attribute *attr, char *buf)
7723 {
7724         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7725
7726         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7727 }
7728
7729 static ssize_t store_flags(struct device *d,
7730                            struct device_attribute *attr,
7731                            const char *buf, size_t count)
7732 {
7733         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7734         u32 flags = simple_strtoul(buf, NULL, 0);
7735
7736         mutex_lock(&priv->mutex);
7737         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7738                 /* Cancel any currently running scans... */
7739                 if (iwl4965_scan_cancel_timeout(priv, 100))
7740                         IWL_WARNING("Could not cancel scan.\n");
7741                 else {
7742                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7743                                        flags);
7744                         priv->staging_rxon.flags = cpu_to_le32(flags);
7745                         iwl4965_commit_rxon(priv);
7746                 }
7747         }
7748         mutex_unlock(&priv->mutex);
7749
7750         return count;
7751 }
7752
7753 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7754
7755 static ssize_t show_filter_flags(struct device *d,
7756                                  struct device_attribute *attr, char *buf)
7757 {
7758         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7759
7760         return sprintf(buf, "0x%04X\n",
7761                 le32_to_cpu(priv->active_rxon.filter_flags));
7762 }
7763
7764 static ssize_t store_filter_flags(struct device *d,
7765                                   struct device_attribute *attr,
7766                                   const char *buf, size_t count)
7767 {
7768         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7769         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7770
7771         mutex_lock(&priv->mutex);
7772         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7773                 /* Cancel any currently running scans... */
7774                 if (iwl4965_scan_cancel_timeout(priv, 100))
7775                         IWL_WARNING("Could not cancel scan.\n");
7776                 else {
7777                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7778                                        "0x%04X\n", filter_flags);
7779                         priv->staging_rxon.filter_flags =
7780                                 cpu_to_le32(filter_flags);
7781                         iwl4965_commit_rxon(priv);
7782                 }
7783         }
7784         mutex_unlock(&priv->mutex);
7785
7786         return count;
7787 }
7788
7789 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7790                    store_filter_flags);
7791
7792 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7793
7794 static ssize_t show_measurement(struct device *d,
7795                                 struct device_attribute *attr, char *buf)
7796 {
7797         struct iwl_priv *priv = dev_get_drvdata(d);
7798         struct iwl4965_spectrum_notification measure_report;
7799         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7800         u8 *data = (u8 *) & measure_report;
7801         unsigned long flags;
7802
7803         spin_lock_irqsave(&priv->lock, flags);
7804         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7805                 spin_unlock_irqrestore(&priv->lock, flags);
7806                 return 0;
7807         }
7808         memcpy(&measure_report, &priv->measure_report, size);
7809         priv->measurement_status = 0;
7810         spin_unlock_irqrestore(&priv->lock, flags);
7811
7812         while (size && (PAGE_SIZE - len)) {
7813                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7814                                    PAGE_SIZE - len, 1);
7815                 len = strlen(buf);
7816                 if (PAGE_SIZE - len)
7817                         buf[len++] = '\n';
7818
7819                 ofs += 16;
7820                 size -= min(size, 16U);
7821         }
7822
7823         return len;
7824 }
7825
7826 static ssize_t store_measurement(struct device *d,
7827                                  struct device_attribute *attr,
7828                                  const char *buf, size_t count)
7829 {
7830         struct iwl_priv *priv = dev_get_drvdata(d);
7831         struct ieee80211_measurement_params params = {
7832                 .channel = le16_to_cpu(priv->active_rxon.channel),
7833                 .start_time = cpu_to_le64(priv->last_tsf),
7834                 .duration = cpu_to_le16(1),
7835         };
7836         u8 type = IWL_MEASURE_BASIC;
7837         u8 buffer[32];
7838         u8 channel;
7839
7840         if (count) {
7841                 char *p = buffer;
7842                 strncpy(buffer, buf, min(sizeof(buffer), count));
7843                 channel = simple_strtoul(p, NULL, 0);
7844                 if (channel)
7845                         params.channel = channel;
7846
7847                 p = buffer;
7848                 while (*p && *p != ' ')
7849                         p++;
7850                 if (*p)
7851                         type = simple_strtoul(p + 1, NULL, 0);
7852         }
7853
7854         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7855                        "channel %d (for '%s')\n", type, params.channel, buf);
7856         iwl4965_get_measurement(priv, &params, type);
7857
7858         return count;
7859 }
7860
7861 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7862                    show_measurement, store_measurement);
7863 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7864
7865 static ssize_t store_retry_rate(struct device *d,
7866                                 struct device_attribute *attr,
7867                                 const char *buf, size_t count)
7868 {
7869         struct iwl_priv *priv = dev_get_drvdata(d);
7870
7871         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7872         if (priv->retry_rate <= 0)
7873                 priv->retry_rate = 1;
7874
7875         return count;
7876 }
7877
7878 static ssize_t show_retry_rate(struct device *d,
7879                                struct device_attribute *attr, char *buf)
7880 {
7881         struct iwl_priv *priv = dev_get_drvdata(d);
7882         return sprintf(buf, "%d", priv->retry_rate);
7883 }
7884
7885 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7886                    store_retry_rate);
7887
7888 static ssize_t store_power_level(struct device *d,
7889                                  struct device_attribute *attr,
7890                                  const char *buf, size_t count)
7891 {
7892         struct iwl_priv *priv = dev_get_drvdata(d);
7893         int rc;
7894         int mode;
7895
7896         mode = simple_strtoul(buf, NULL, 0);
7897         mutex_lock(&priv->mutex);
7898
7899         if (!iwl4965_is_ready(priv)) {
7900                 rc = -EAGAIN;
7901                 goto out;
7902         }
7903
7904         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7905                 mode = IWL_POWER_AC;
7906         else
7907                 mode |= IWL_POWER_ENABLED;
7908
7909         if (mode != priv->power_mode) {
7910                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7911                 if (rc) {
7912                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7913                         goto out;
7914                 }
7915                 priv->power_mode = mode;
7916         }
7917
7918         rc = count;
7919
7920  out:
7921         mutex_unlock(&priv->mutex);
7922         return rc;
7923 }
7924
7925 #define MAX_WX_STRING 80
7926
7927 /* Values are in microsecond */
7928 static const s32 timeout_duration[] = {
7929         350000,
7930         250000,
7931         75000,
7932         37000,
7933         25000,
7934 };
7935 static const s32 period_duration[] = {
7936         400000,
7937         700000,
7938         1000000,
7939         1000000,
7940         1000000
7941 };
7942
7943 static ssize_t show_power_level(struct device *d,
7944                                 struct device_attribute *attr, char *buf)
7945 {
7946         struct iwl_priv *priv = dev_get_drvdata(d);
7947         int level = IWL_POWER_LEVEL(priv->power_mode);
7948         char *p = buf;
7949
7950         p += sprintf(p, "%d ", level);
7951         switch (level) {
7952         case IWL_POWER_MODE_CAM:
7953         case IWL_POWER_AC:
7954                 p += sprintf(p, "(AC)");
7955                 break;
7956         case IWL_POWER_BATTERY:
7957                 p += sprintf(p, "(BATTERY)");
7958                 break;
7959         default:
7960                 p += sprintf(p,
7961                              "(Timeout %dms, Period %dms)",
7962                              timeout_duration[level - 1] / 1000,
7963                              period_duration[level - 1] / 1000);
7964         }
7965
7966         if (!(priv->power_mode & IWL_POWER_ENABLED))
7967                 p += sprintf(p, " OFF\n");
7968         else
7969                 p += sprintf(p, " \n");
7970
7971         return (p - buf + 1);
7972
7973 }
7974
7975 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7976                    store_power_level);
7977
7978 static ssize_t show_channels(struct device *d,
7979                              struct device_attribute *attr, char *buf)
7980 {
7981         /* all this shit doesn't belong into sysfs anyway */
7982         return 0;
7983 }
7984
7985 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7986
7987 static ssize_t show_statistics(struct device *d,
7988                                struct device_attribute *attr, char *buf)
7989 {
7990         struct iwl_priv *priv = dev_get_drvdata(d);
7991         u32 size = sizeof(struct iwl4965_notif_statistics);
7992         u32 len = 0, ofs = 0;
7993         u8 *data = (u8 *) & priv->statistics;
7994         int rc = 0;
7995
7996         if (!iwl4965_is_alive(priv))
7997                 return -EAGAIN;
7998
7999         mutex_lock(&priv->mutex);
8000         rc = iwl4965_send_statistics_request(priv);
8001         mutex_unlock(&priv->mutex);
8002
8003         if (rc) {
8004                 len = sprintf(buf,
8005                               "Error sending statistics request: 0x%08X\n", rc);
8006                 return len;
8007         }
8008
8009         while (size && (PAGE_SIZE - len)) {
8010                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8011                                    PAGE_SIZE - len, 1);
8012                 len = strlen(buf);
8013                 if (PAGE_SIZE - len)
8014                         buf[len++] = '\n';
8015
8016                 ofs += 16;
8017                 size -= min(size, 16U);
8018         }
8019
8020         return len;
8021 }
8022
8023 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8024
8025 static ssize_t show_antenna(struct device *d,
8026                             struct device_attribute *attr, char *buf)
8027 {
8028         struct iwl_priv *priv = dev_get_drvdata(d);
8029
8030         if (!iwl4965_is_alive(priv))
8031                 return -EAGAIN;
8032
8033         return sprintf(buf, "%d\n", priv->antenna);
8034 }
8035
8036 static ssize_t store_antenna(struct device *d,
8037                              struct device_attribute *attr,
8038                              const char *buf, size_t count)
8039 {
8040         int ant;
8041         struct iwl_priv *priv = dev_get_drvdata(d);
8042
8043         if (count == 0)
8044                 return 0;
8045
8046         if (sscanf(buf, "%1i", &ant) != 1) {
8047                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8048                 return count;
8049         }
8050
8051         if ((ant >= 0) && (ant <= 2)) {
8052                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8053                 priv->antenna = (enum iwl4965_antenna)ant;
8054         } else
8055                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8056
8057
8058         return count;
8059 }
8060
8061 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8062
8063 static ssize_t show_status(struct device *d,
8064                            struct device_attribute *attr, char *buf)
8065 {
8066         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8067         if (!iwl4965_is_alive(priv))
8068                 return -EAGAIN;
8069         return sprintf(buf, "0x%08x\n", (int)priv->status);
8070 }
8071
8072 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8073
8074 static ssize_t dump_error_log(struct device *d,
8075                               struct device_attribute *attr,
8076                               const char *buf, size_t count)
8077 {
8078         char *p = (char *)buf;
8079
8080         if (p[0] == '1')
8081                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8082
8083         return strnlen(buf, count);
8084 }
8085
8086 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8087
8088 static ssize_t dump_event_log(struct device *d,
8089                               struct device_attribute *attr,
8090                               const char *buf, size_t count)
8091 {
8092         char *p = (char *)buf;
8093
8094         if (p[0] == '1')
8095                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8096
8097         return strnlen(buf, count);
8098 }
8099
8100 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8101
8102 /*****************************************************************************
8103  *
8104  * driver setup and teardown
8105  *
8106  *****************************************************************************/
8107
8108 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
8109 {
8110         priv->workqueue = create_workqueue(DRV_NAME);
8111
8112         init_waitqueue_head(&priv->wait_command_queue);
8113
8114         INIT_WORK(&priv->up, iwl4965_bg_up);
8115         INIT_WORK(&priv->restart, iwl4965_bg_restart);
8116         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
8117         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
8118         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
8119         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
8120         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
8121         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
8122         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
8123         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
8124         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
8125         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
8126
8127         iwl4965_hw_setup_deferred_work(priv);
8128
8129         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8130                      iwl4965_irq_tasklet, (unsigned long)priv);
8131 }
8132
8133 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
8134 {
8135         iwl4965_hw_cancel_deferred_work(priv);
8136
8137         cancel_delayed_work_sync(&priv->init_alive_start);
8138         cancel_delayed_work(&priv->scan_check);
8139         cancel_delayed_work(&priv->alive_start);
8140         cancel_delayed_work(&priv->post_associate);
8141         cancel_work_sync(&priv->beacon_update);
8142 }
8143
8144 static struct attribute *iwl4965_sysfs_entries[] = {
8145         &dev_attr_antenna.attr,
8146         &dev_attr_channels.attr,
8147         &dev_attr_dump_errors.attr,
8148         &dev_attr_dump_events.attr,
8149         &dev_attr_flags.attr,
8150         &dev_attr_filter_flags.attr,
8151 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8152         &dev_attr_measurement.attr,
8153 #endif
8154         &dev_attr_power_level.attr,
8155         &dev_attr_retry_rate.attr,
8156         &dev_attr_rf_kill.attr,
8157         &dev_attr_rs_window.attr,
8158         &dev_attr_statistics.attr,
8159         &dev_attr_status.attr,
8160         &dev_attr_temperature.attr,
8161         &dev_attr_tx_power.attr,
8162
8163         NULL
8164 };
8165
8166 static struct attribute_group iwl4965_attribute_group = {
8167         .name = NULL,           /* put in device directory */
8168         .attrs = iwl4965_sysfs_entries,
8169 };
8170
8171 static struct ieee80211_ops iwl4965_hw_ops = {
8172         .tx = iwl4965_mac_tx,
8173         .start = iwl4965_mac_start,
8174         .stop = iwl4965_mac_stop,
8175         .add_interface = iwl4965_mac_add_interface,
8176         .remove_interface = iwl4965_mac_remove_interface,
8177         .config = iwl4965_mac_config,
8178         .config_interface = iwl4965_mac_config_interface,
8179         .configure_filter = iwl4965_configure_filter,
8180         .set_key = iwl4965_mac_set_key,
8181         .update_tkip_key = iwl4965_mac_update_tkip_key,
8182         .get_stats = iwl4965_mac_get_stats,
8183         .get_tx_stats = iwl4965_mac_get_tx_stats,
8184         .conf_tx = iwl4965_mac_conf_tx,
8185         .get_tsf = iwl4965_mac_get_tsf,
8186         .reset_tsf = iwl4965_mac_reset_tsf,
8187         .beacon_update = iwl4965_mac_beacon_update,
8188         .bss_info_changed = iwl4965_bss_info_changed,
8189 #ifdef CONFIG_IWL4965_HT
8190         .conf_ht = iwl4965_mac_conf_ht,
8191         .ampdu_action = iwl4965_mac_ampdu_action,
8192 #endif  /* CONFIG_IWL4965_HT */
8193         .hw_scan = iwl4965_mac_hw_scan
8194 };
8195
8196 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8197 {
8198         int err = 0;
8199         struct iwl_priv *priv;
8200         struct ieee80211_hw *hw;
8201         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
8202         DECLARE_MAC_BUF(mac);
8203
8204         /************************
8205          * 1. Allocating HW data
8206          ************************/
8207
8208         /* Disabling hardware scan means that mac80211 will perform scans
8209          * "the hard way", rather than using device's scan. */
8210         if (iwl4965_mod_params.disable_hw_scan) {
8211                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8212                 iwl4965_hw_ops.hw_scan = NULL;
8213         }
8214
8215         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
8216         if (!hw) {
8217                 err = -ENOMEM;
8218                 goto out;
8219         }
8220         priv = hw->priv;
8221         /* At this point both hw and priv are allocated. */
8222
8223         SET_IEEE80211_DEV(hw, &pdev->dev);
8224
8225         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8226         priv->cfg = cfg;
8227         priv->pci_dev = pdev;
8228
8229 #ifdef CONFIG_IWLWIFI_DEBUG
8230         iwl_debug_level = iwl4965_mod_params.debug;
8231         atomic_set(&priv->restrict_refcnt, 0);
8232 #endif
8233
8234         /**************************
8235          * 2. Initializing PCI bus
8236          **************************/
8237         if (pci_enable_device(pdev)) {
8238                 err = -ENODEV;
8239                 goto out_ieee80211_free_hw;
8240         }
8241
8242         pci_set_master(pdev);
8243
8244         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8245         if (!err)
8246                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8247                 if (err) {
8248                         printk(KERN_WARNING DRV_NAME
8249                                 ": No suitable DMA available.\n");
8250                         goto out_pci_disable_device;
8251         }
8252
8253         err = pci_request_regions(pdev, DRV_NAME);
8254         if (err)
8255                 goto out_pci_disable_device;
8256
8257         pci_set_drvdata(pdev, priv);
8258
8259         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8260          * PCI Tx retries from interfering with C3 CPU state */
8261         pci_write_config_byte(pdev, 0x41, 0x00);
8262
8263         /***********************
8264          * 3. Read REV register
8265          ***********************/
8266         priv->hw_base = pci_iomap(pdev, 0, 0);
8267         if (!priv->hw_base) {
8268                 err = -ENODEV;
8269                 goto out_pci_release_regions;
8270         }
8271
8272         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8273                 (unsigned long long) pci_resource_len(pdev, 0));
8274         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8275
8276         printk(KERN_INFO DRV_NAME
8277                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8278
8279         /*****************
8280          * 4. Read EEPROM
8281          *****************/
8282         /* nic init */
8283         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8284                 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8285
8286         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8287         err = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
8288                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8289                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8290         if (err < 0) {
8291                 IWL_DEBUG_INFO("Failed to init the card\n");
8292                 goto out_iounmap;
8293         }
8294         /* Read the EEPROM */
8295         err = iwl_eeprom_init(priv);
8296         if (err) {
8297                 IWL_ERROR("Unable to init EEPROM\n");
8298                 goto out_iounmap;
8299         }
8300         /* MAC Address location in EEPROM same for 3945/4965 */
8301         iwl_eeprom_get_mac(priv, priv->mac_addr);
8302         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8303         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8304
8305         /************************
8306          * 5. Setup HW constants
8307          ************************/
8308         /* Device-specific setup */
8309         if (iwl4965_hw_set_hw_setting(priv)) {
8310                 IWL_ERROR("failed to set hw settings\n");
8311                 goto out_iounmap;
8312         }
8313
8314         /*******************
8315          * 6. Setup hw/priv
8316          *******************/
8317
8318         err = iwl_setup(priv);
8319         if (err)
8320                 goto out_unset_hw_settings;
8321         /* At this point both hw and priv are initialized. */
8322
8323         /**********************************
8324          * 7. Initialize module parameters
8325          **********************************/
8326
8327         /* Disable radio (SW RF KILL) via parameter when loading driver */
8328         if (iwl4965_mod_params.disable) {
8329                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8330                 IWL_DEBUG_INFO("Radio disabled.\n");
8331         }
8332
8333         if (iwl4965_mod_params.enable_qos)
8334                 priv->qos_data.qos_enable = 1;
8335
8336         /********************
8337          * 8. Setup services
8338          ********************/
8339         iwl4965_disable_interrupts(priv);
8340
8341         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8342         if (err) {
8343                 IWL_ERROR("failed to create sysfs device attributes\n");
8344                 goto out_unset_hw_settings;
8345         }
8346
8347         err = iwl_dbgfs_register(priv, DRV_NAME);
8348         if (err) {
8349                 IWL_ERROR("failed to create debugfs files\n");
8350                 goto out_remove_sysfs;
8351         }
8352
8353         iwl4965_setup_deferred_work(priv);
8354         iwl4965_setup_rx_handlers(priv);
8355
8356         /********************
8357          * 9. Conclude
8358          ********************/
8359         pci_save_state(pdev);
8360         pci_disable_device(pdev);
8361
8362         return 0;
8363
8364  out_remove_sysfs:
8365         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8366  out_unset_hw_settings:
8367         iwl4965_unset_hw_setting(priv);
8368  out_iounmap:
8369         pci_iounmap(pdev, priv->hw_base);
8370  out_pci_release_regions:
8371         pci_release_regions(pdev);
8372         pci_set_drvdata(pdev, NULL);
8373  out_pci_disable_device:
8374         pci_disable_device(pdev);
8375  out_ieee80211_free_hw:
8376         ieee80211_free_hw(priv->hw);
8377  out:
8378         return err;
8379 }
8380
8381 static void iwl4965_pci_remove(struct pci_dev *pdev)
8382 {
8383         struct iwl_priv *priv = pci_get_drvdata(pdev);
8384         struct list_head *p, *q;
8385         int i;
8386
8387         if (!priv)
8388                 return;
8389
8390         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8391
8392         set_bit(STATUS_EXIT_PENDING, &priv->status);
8393
8394         iwl4965_down(priv);
8395
8396         /* Free MAC hash list for ADHOC */
8397         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8398                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8399                         list_del(p);
8400                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
8401                 }
8402         }
8403
8404         iwl_dbgfs_unregister(priv);
8405         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8406
8407         iwl4965_dealloc_ucode_pci(priv);
8408
8409         if (priv->rxq.bd)
8410                 iwl4965_rx_queue_free(priv, &priv->rxq);
8411         iwl4965_hw_txq_ctx_free(priv);
8412
8413         iwl4965_unset_hw_setting(priv);
8414         iwlcore_clear_stations_table(priv);
8415
8416         if (priv->mac80211_registered) {
8417                 ieee80211_unregister_hw(priv->hw);
8418                 iwl4965_rate_control_unregister(priv->hw);
8419         }
8420
8421         /*netif_stop_queue(dev); */
8422         flush_workqueue(priv->workqueue);
8423
8424         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
8425          * priv->workqueue... so we can't take down the workqueue
8426          * until now... */
8427         destroy_workqueue(priv->workqueue);
8428         priv->workqueue = NULL;
8429
8430         pci_iounmap(pdev, priv->hw_base);
8431         pci_release_regions(pdev);
8432         pci_disable_device(pdev);
8433         pci_set_drvdata(pdev, NULL);
8434
8435         iwl_free_channel_map(priv);
8436         iwl4965_free_geos(priv);
8437
8438         if (priv->ibss_beacon)
8439                 dev_kfree_skb(priv->ibss_beacon);
8440
8441         ieee80211_free_hw(priv->hw);
8442 }
8443
8444 #ifdef CONFIG_PM
8445
8446 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8447 {
8448         struct iwl_priv *priv = pci_get_drvdata(pdev);
8449
8450         if (priv->is_open) {
8451                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8452                 iwl4965_mac_stop(priv->hw);
8453                 priv->is_open = 1;
8454         }
8455
8456         pci_set_power_state(pdev, PCI_D3hot);
8457
8458         return 0;
8459 }
8460
8461 static int iwl4965_pci_resume(struct pci_dev *pdev)
8462 {
8463         struct iwl_priv *priv = pci_get_drvdata(pdev);
8464
8465         pci_set_power_state(pdev, PCI_D0);
8466
8467         if (priv->is_open)
8468                 iwl4965_mac_start(priv->hw);
8469
8470         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8471         return 0;
8472 }
8473
8474 #endif /* CONFIG_PM */
8475
8476 /*****************************************************************************
8477  *
8478  * driver and module entry point
8479  *
8480  *****************************************************************************/
8481
8482 static struct pci_driver iwl4965_driver = {
8483         .name = DRV_NAME,
8484         .id_table = iwl4965_hw_card_ids,
8485         .probe = iwl4965_pci_probe,
8486         .remove = __devexit_p(iwl4965_pci_remove),
8487 #ifdef CONFIG_PM
8488         .suspend = iwl4965_pci_suspend,
8489         .resume = iwl4965_pci_resume,
8490 #endif
8491 };
8492
8493 static int __init iwl4965_init(void)
8494 {
8495
8496         int ret;
8497         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8498         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8499         ret = pci_register_driver(&iwl4965_driver);
8500         if (ret) {
8501                 IWL_ERROR("Unable to initialize PCI module\n");
8502                 return ret;
8503         }
8504 #ifdef CONFIG_IWLWIFI_DEBUG
8505         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8506         if (ret) {
8507                 IWL_ERROR("Unable to create driver sysfs file\n");
8508                 pci_unregister_driver(&iwl4965_driver);
8509                 return ret;
8510         }
8511 #endif
8512
8513         return ret;
8514 }
8515
8516 static void __exit iwl4965_exit(void)
8517 {
8518 #ifdef CONFIG_IWLWIFI_DEBUG
8519         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8520 #endif
8521         pci_unregister_driver(&iwl4965_driver);
8522 }
8523
8524 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
8525 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8526 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
8527 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8528 module_param_named(hwcrypto, iwl4965_mod_params.hw_crypto, int, 0444);
8529 MODULE_PARM_DESC(hwcrypto,
8530                  "using hardware crypto engine (default 0 [software])\n");
8531 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
8532 MODULE_PARM_DESC(debug, "debug output mask");
8533 module_param_named(
8534         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
8535 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8536
8537 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
8538 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8539
8540 /* QoS */
8541 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
8542 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8543 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
8544 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
8545
8546 module_exit(iwl4965_exit);
8547 module_init(iwl4965_init);