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 iwl4965_priv *priv,
  54                                   struct iwl4965_tx_queue *txq);
  55
  56 /******************************************************************************
  57  *
  58  * module boiler plate
  59  *
  60  ******************************************************************************/
  61
  62 /* module parameters */
  63 static int iwl4965_param_disable_hw_scan; /* def: 0 = use 4965's h/w scan */
  64 static int iwl4965_param_debug;    /* def: 0 = minimal debug log messages */
  65 static int iwl4965_param_disable;  /* def: enable radio */
  66 static int iwl4965_param_antenna;  /* def: 0 = both antennas (use diversity) */
  67 int iwl4965_param_hwcrypto;        /* def: using software encryption */
  68 static int iwl4965_param_qos_enable = 1; /* def: 1 = use quality of service */
  69 int iwl4965_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 16 Tx queues */
  70 int iwl4965_param_amsdu_size_8K;   /* def: enable 8K amsdu size */
  71
  72 /*
  73  * module name, copyright, version, etc.
  74  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  75  */
  76
  77 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  78
  79 #ifdef CONFIG_IWL4965_DEBUG
  80 #define VD "d"
  81 #else
  82 #define VD
  83 #endif
  84
  85 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  86 #define VS "s"
  87 #else
  88 #define VS
  89 #endif
  90
  91 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  92
  93
  94 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  95 MODULE_VERSION(DRV_VERSION);
  96 MODULE_AUTHOR(DRV_COPYRIGHT);
  97 MODULE_LICENSE("GPL");
  98
  99 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 100 {
 101         u16 fc = le16_to_cpu(hdr->frame_control);
 102         int hdr_len = ieee80211_get_hdrlen(fc);
 103
 104         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 105                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 106         return NULL;
 107 }
 108
 109 static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
 110                 struct iwl4965_priv *priv, enum ieee80211_band band)
 111 {
 112         return priv->hw->wiphy->bands[band];
 113 }
 114
 115 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 116 {
 117         /* Single white space is for Linksys APs */
 118         if (essid_len == 1 && essid[0] == ' ')
 119                 return 1;
 120
 121         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 122         while (essid_len) {
 123                 essid_len--;
 124                 if (essid[essid_len] != '\0')
 125                         return 0;
 126         }
 127
 128         return 1;
 129 }
 130
 131 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 132 {
 133         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 134         const char *s = essid;
 135         char *d = escaped;
 136
 137         if (iwl4965_is_empty_essid(essid, essid_len)) {
 138                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 139                 return escaped;
 140         }
 141
 142         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 143         while (essid_len--) {
 144                 if (*s == '\0') {
 145                         *d++ = '\\';
 146                         *d++ = '0';
 147                         s++;
 148                 } else
 149                         *d++ = *s++;
 150         }
 151         *d = '\0';
 152         return escaped;
 153 }
 154
 155 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 156  * DMA services
 157  *
 158  * Theory of operation
 159  *
 160  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 161  * of buffer descriptors, each of which points to one or more data buffers for
 162  * the device to read from or fill.  Driver and device exchange status of each
 163  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 164  * entries in each circular buffer, to protect against confusing empty and full
 165  * queue states.
 166  *
 167  * The device reads or writes the data in the queues via the device's several
 168  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 169  *
 170  * For Tx queue, there are low mark and high mark limits. If, after queuing
 171  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 172  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 173  * Tx queue resumed.
 174  *
 175  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 176  * queue (#4) for sending commands to the device firmware, and 15 other
 177  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 178  *
 179  * See more detailed info in iwl-4965-hw.h.
 180  ***************************************************/
 181
 182 int iwl4965_queue_space(const struct iwl4965_queue *q)
 183 {
 184         int s = q->read_ptr - q->write_ptr;
 185
 186         if (q->read_ptr > q->write_ptr)
 187                 s -= q->n_bd;
 188
 189         if (s <= 0)
 190                 s += q->n_window;
 191         /* keep some reserve to not confuse empty and full situations */
 192         s -= 2;
 193         if (s < 0)
 194                 s = 0;
 195         return s;
 196 }
 197
 198
 199 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 200 {
 201         return q->write_ptr > q->read_ptr ?
 202                 (i >= q->read_ptr && i < q->write_ptr) :
 203                 !(i < q->read_ptr && i >= q->write_ptr);
 204 }
 205
 206 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 207 {
 208         /* This is for scan command, the big buffer at end of command array */
 209         if (is_huge)
 210                 return q->n_window;     /* must be power of 2 */
 211
 212         /* Otherwise, use normal size buffers */
 213         return index & (q->n_window - 1);
 214 }
 215
 216 /**
 217  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 218  */
 219 static int iwl4965_queue_init(struct iwl4965_priv *priv, struct iwl4965_queue *q,
 220                           int count, int slots_num, u32 id)
 221 {
 222         q->n_bd = count;
 223         q->n_window = slots_num;
 224         q->id = id;
 225
 226         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 227          * and iwl_queue_dec_wrap are broken. */
 228         BUG_ON(!is_power_of_2(count));
 229
 230         /* slots_num must be power-of-two size, otherwise
 231          * get_cmd_index is broken. */
 232         BUG_ON(!is_power_of_2(slots_num));
 233
 234         q->low_mark = q->n_window / 4;
 235         if (q->low_mark < 4)
 236                 q->low_mark = 4;
 237
 238         q->high_mark = q->n_window / 8;
 239         if (q->high_mark < 2)
 240                 q->high_mark = 2;
 241
 242         q->write_ptr = q->read_ptr = 0;
 243
 244         return 0;
 245 }
 246
 247 /**
 248  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 249  */
 250 static int iwl4965_tx_queue_alloc(struct iwl4965_priv *priv,
 251                               struct iwl4965_tx_queue *txq, u32 id)
 252 {
 253         struct pci_dev *dev = priv->pci_dev;
 254
 255         /* Driver private data, only for Tx (not command) queues,
 256          * not shared with device. */
 257         if (id != IWL_CMD_QUEUE_NUM) {
 258                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 259                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 260                 if (!txq->txb) {
 261                         IWL_ERROR("kmalloc for auxiliary BD "
 262                                   "structures failed\n");
 263                         goto error;
 264                 }
 265         } else
 266                 txq->txb = NULL;
 267
 268         /* Circular buffer of transmit frame descriptors (TFDs),
 269          * shared with device */
 270         txq->bd = pci_alloc_consistent(dev,
 271                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 272                         &txq->q.dma_addr);
 273
 274         if (!txq->bd) {
 275                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 276                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 277                 goto error;
 278         }
 279         txq->q.id = id;
 280
 281         return 0;
 282
 283  error:
 284         if (txq->txb) {
 285                 kfree(txq->txb);
 286                 txq->txb = NULL;
 287         }
 288
 289         return -ENOMEM;
 290 }
 291
 292 /**
 293  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 294  */
 295 int iwl4965_tx_queue_init(struct iwl4965_priv *priv,
 296                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 297 {
 298         struct pci_dev *dev = priv->pci_dev;
 299         int len;
 300         int rc = 0;
 301
 302         /*
 303          * Alloc buffer array for commands (Tx or other types of commands).
 304          * For the command queue (#4), allocate command space + one big
 305          * command for scan, since scan command is very huge; the system will
 306          * not have two scans at the same time, so only one is needed.
 307          * For normal Tx queues (all other queues), no super-size command
 308          * space is needed.
 309          */
 310         len = sizeof(struct iwl4965_cmd) * slots_num;
 311         if (txq_id == IWL_CMD_QUEUE_NUM)
 312                 len +=  IWL_MAX_SCAN_SIZE;
 313         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 314         if (!txq->cmd)
 315                 return -ENOMEM;
 316
 317         /* Alloc driver data array and TFD circular buffer */
 318         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 319         if (rc) {
 320                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 321
 322                 return -ENOMEM;
 323         }
 324         txq->need_update = 0;
 325
 326         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 327          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 328         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 329
 330         /* Initialize queue's high/low-water marks, and head/tail indexes */
 331         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 332
 333         /* Tell device where to find queue */
 334         iwl4965_hw_tx_queue_init(priv, txq);
 335
 336         return 0;
 337 }
 338
 339 /**
 340  * iwl4965_tx_queue_free - Deallocate DMA queue.
 341  * @txq: Transmit queue to deallocate.
 342  *
 343  * Empty queue by removing and destroying all BD's.
 344  * Free all buffers.
 345  * 0-fill, but do not free "txq" descriptor structure.
 346  */
 347 void iwl4965_tx_queue_free(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
 348 {
 349         struct iwl4965_queue *q = &txq->q;
 350         struct pci_dev *dev = priv->pci_dev;
 351         int len;
 352
 353         if (q->n_bd == 0)
 354                 return;
 355
 356         /* first, empty all BD's */
 357         for (; q->write_ptr != q->read_ptr;
 358              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 359                 iwl4965_hw_txq_free_tfd(priv, txq);
 360
 361         len = sizeof(struct iwl4965_cmd) * q->n_window;
 362         if (q->id == IWL_CMD_QUEUE_NUM)
 363                 len += IWL_MAX_SCAN_SIZE;
 364
 365         /* De-alloc array of command/tx buffers */
 366         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 367
 368         /* De-alloc circular buffer of TFDs */
 369         if (txq->q.n_bd)
 370                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 371                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 372
 373         /* De-alloc array of per-TFD driver data */
 374         if (txq->txb) {
 375                 kfree(txq->txb);
 376                 txq->txb = NULL;
 377         }
 378
 379         /* 0-fill queue descriptor structure */
 380         memset(txq, 0, sizeof(*txq));
 381 }
 382
 383 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 384
 385 /*************** STATION TABLE MANAGEMENT ****
 386  * mac80211 should be examined to determine if sta_info is duplicating
 387  * the functionality provided here
 388  */
 389
 390 /**************************************************************/
 391
 392 #if 0 /* temporary disable till we add real remove station */
 393 /**
 394  * iwl4965_remove_station - Remove driver's knowledge of station.
 395  *
 396  * NOTE:  This does not remove station from device's station table.
 397  */
 398 static u8 iwl4965_remove_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
 399 {
 400         int index = IWL_INVALID_STATION;
 401         int i;
 402         unsigned long flags;
 403
 404         spin_lock_irqsave(&priv->sta_lock, flags);
 405
 406         if (is_ap)
 407                 index = IWL_AP_ID;
 408         else if (is_broadcast_ether_addr(addr))
 409                 index = priv->hw_setting.bcast_sta_id;
 410         else
 411                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 412                         if (priv->stations[i].used &&
 413                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 414                                                 addr)) {
 415                                 index = i;
 416                                 break;
 417                         }
 418
 419         if (unlikely(index == IWL_INVALID_STATION))
 420                 goto out;
 421
 422         if (priv->stations[index].used) {
 423                 priv->stations[index].used = 0;
 424                 priv->num_stations--;
 425         }
 426
 427         BUG_ON(priv->num_stations < 0);
 428
 429 out:
 430         spin_unlock_irqrestore(&priv->sta_lock, flags);
 431         return 0;
 432 }
 433 #endif
 434
 435 /**
 436  * iwl4965_clear_stations_table - Clear the driver's station table
 437  *
 438  * NOTE:  This does not clear or otherwise alter the device's station table.
 439  */
 440 static void iwl4965_clear_stations_table(struct iwl4965_priv *priv)
 441 {
 442         unsigned long flags;
 443
 444         spin_lock_irqsave(&priv->sta_lock, flags);
 445
 446         priv->num_stations = 0;
 447         memset(priv->stations, 0, sizeof(priv->stations));
 448
 449         spin_unlock_irqrestore(&priv->sta_lock, flags);
 450 }
 451
 452 /**
 453  * iwl4965_add_station_flags - Add station to tables in driver and device
 454  */
 455 u8 iwl4965_add_station_flags(struct iwl4965_priv *priv, const u8 *addr,
 456                                 int is_ap, u8 flags, void *ht_data)
 457 {
 458         int i;
 459         int index = IWL_INVALID_STATION;
 460         struct iwl4965_station_entry *station;
 461         unsigned long flags_spin;
 462         DECLARE_MAC_BUF(mac);
 463
 464         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 465         if (is_ap)
 466                 index = IWL_AP_ID;
 467         else if (is_broadcast_ether_addr(addr))
 468                 index = priv->hw_setting.bcast_sta_id;
 469         else
 470                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 471                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 472                                                 addr)) {
 473                                 index = i;
 474                                 break;
 475                         }
 476
 477                         if (!priv->stations[i].used &&
 478                             index == IWL_INVALID_STATION)
 479                                 index = i;
 480                 }
 481
 482
 483         /* These two conditions have the same outcome, but keep them separate
 484           since they have different meanings */
 485         if (unlikely(index == IWL_INVALID_STATION)) {
 486                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 487                 return index;
 488         }
 489
 490         if (priv->stations[index].used &&
 491             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 492                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 493                 return index;
 494         }
 495
 496
 497         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 498         station = &priv->stations[index];
 499         station->used = 1;
 500         priv->num_stations++;
 501
 502         /* Set up the REPLY_ADD_STA command to send to device */
 503         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 504         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 505         station->sta.mode = 0;
 506         station->sta.sta.sta_id = index;
 507         station->sta.station_flags = 0;
 508
 509 #ifdef CONFIG_IWL4965_HT
 510         /* BCAST station and IBSS stations do not work in HT mode */
 511         if (index != priv->hw_setting.bcast_sta_id &&
 512             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 513                 iwl4965_set_ht_add_station(priv, index,
 514                                  (struct ieee80211_ht_info *) ht_data);
 515 #endif /*CONFIG_IWL4965_HT*/
 516
 517         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 518
 519         /* Add station to device's station table */
 520         iwl4965_send_add_station(priv, &station->sta, flags);
 521         return index;
 522
 523 }
 524
 525 /*************** DRIVER STATUS FUNCTIONS   *****/
 526
 527 static inline int iwl4965_is_ready(struct iwl4965_priv *priv)
 528 {
 529         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 530          * set but EXIT_PENDING is not */
 531         return test_bit(STATUS_READY, &priv->status) &&
 532                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 533                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 534 }
 535
 536 static inline int iwl4965_is_alive(struct iwl4965_priv *priv)
 537 {
 538         return test_bit(STATUS_ALIVE, &priv->status);
 539 }
 540
 541 static inline int iwl4965_is_init(struct iwl4965_priv *priv)
 542 {
 543         return test_bit(STATUS_INIT, &priv->status);
 544 }
 545
 546 static inline int iwl4965_is_rfkill(struct iwl4965_priv *priv)
 547 {
 548         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 549                test_bit(STATUS_RF_KILL_SW, &priv->status);
 550 }
 551
 552 static inline int iwl4965_is_ready_rf(struct iwl4965_priv *priv)
 553 {
 554
 555         if (iwl4965_is_rfkill(priv))
 556                 return 0;
 557
 558         return iwl4965_is_ready(priv);
 559 }
 560
 561 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 562
 563 #define IWL_CMD(x) case x : return #x
 564
 565 static const char *get_cmd_string(u8 cmd)
 566 {
 567         switch (cmd) {
 568                 IWL_CMD(REPLY_ALIVE);
 569                 IWL_CMD(REPLY_ERROR);
 570                 IWL_CMD(REPLY_RXON);
 571                 IWL_CMD(REPLY_RXON_ASSOC);
 572                 IWL_CMD(REPLY_QOS_PARAM);
 573                 IWL_CMD(REPLY_RXON_TIMING);
 574                 IWL_CMD(REPLY_ADD_STA);
 575                 IWL_CMD(REPLY_REMOVE_STA);
 576                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 577                 IWL_CMD(REPLY_TX);
 578                 IWL_CMD(REPLY_RATE_SCALE);
 579                 IWL_CMD(REPLY_LEDS_CMD);
 580                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 581                 IWL_CMD(RADAR_NOTIFICATION);
 582                 IWL_CMD(REPLY_QUIET_CMD);
 583                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 584                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 585                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 586                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 587                 IWL_CMD(POWER_TABLE_CMD);
 588                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 589                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 590                 IWL_CMD(REPLY_SCAN_CMD);
 591                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 592                 IWL_CMD(SCAN_START_NOTIFICATION);
 593                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 594                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 595                 IWL_CMD(BEACON_NOTIFICATION);
 596                 IWL_CMD(REPLY_TX_BEACON);
 597                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 598                 IWL_CMD(QUIET_NOTIFICATION);
 599                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 600                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 601                 IWL_CMD(REPLY_BT_CONFIG);
 602                 IWL_CMD(REPLY_STATISTICS_CMD);
 603                 IWL_CMD(STATISTICS_NOTIFICATION);
 604                 IWL_CMD(REPLY_CARD_STATE_CMD);
 605                 IWL_CMD(CARD_STATE_NOTIFICATION);
 606                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 607                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 608                 IWL_CMD(SENSITIVITY_CMD);
 609                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 610                 IWL_CMD(REPLY_RX_PHY_CMD);
 611                 IWL_CMD(REPLY_RX_MPDU_CMD);
 612                 IWL_CMD(REPLY_4965_RX);
 613                 IWL_CMD(REPLY_COMPRESSED_BA);
 614         default:
 615                 return "UNKNOWN";
 616
 617         }
 618 }
 619
 620 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 621
 622 /**
 623  * iwl4965_enqueue_hcmd - enqueue a uCode command
 624  * @priv: device private data point
 625  * @cmd: a point to the ucode command structure
 626  *
 627  * The function returns < 0 values to indicate the operation is
 628  * failed. On success, it turns the index (> 0) of command in the
 629  * command queue.
 630  */
 631 static int iwl4965_enqueue_hcmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 632 {
 633         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 634         struct iwl4965_queue *q = &txq->q;
 635         struct iwl4965_tfd_frame *tfd;
 636         u32 *control_flags;
 637         struct iwl4965_cmd *out_cmd;
 638         u32 idx;
 639         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 640         dma_addr_t phys_addr;
 641         int ret;
 642         unsigned long flags;
 643
 644         /* If any of the command structures end up being larger than
 645          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 646          * we will need to increase the size of the TFD entries */
 647         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 648                !(cmd->meta.flags & CMD_SIZE_HUGE));
 649
 650         if (iwl4965_is_rfkill(priv)) {
 651                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 652                 return -EIO;
 653         }
 654
 655         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 656                 IWL_ERROR("No space for Tx\n");
 657                 return -ENOSPC;
 658         }
 659
 660         spin_lock_irqsave(&priv->hcmd_lock, flags);
 661
 662         tfd = &txq->bd[q->write_ptr];
 663         memset(tfd, 0, sizeof(*tfd));
 664
 665         control_flags = (u32 *) tfd;
 666
 667         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 668         out_cmd = &txq->cmd[idx];
 669
 670         out_cmd->hdr.cmd = cmd->id;
 671         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 672         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 673
 674         /* At this point, the out_cmd now has all of the incoming cmd
 675          * information */
 676
 677         out_cmd->hdr.flags = 0;
 678         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 679                         INDEX_TO_SEQ(q->write_ptr));
 680         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 681                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 682
 683         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 684                         offsetof(struct iwl4965_cmd, hdr);
 685         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 686
 687         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 688                      "%d bytes at %d[%d]:%d\n",
 689                      get_cmd_string(out_cmd->hdr.cmd),
 690                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 691                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 692
 693         txq->need_update = 1;
 694
 695         /* Set up entry in queue's byte count circular buffer */
 696         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 697
 698         /* Increment and update queue's write index */
 699         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 700         iwl4965_tx_queue_update_write_ptr(priv, txq);
 701
 702         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 703         return ret ? ret : idx;
 704 }
 705
 706 static int iwl4965_send_cmd_async(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 707 {
 708         int ret;
 709
 710         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 711
 712         /* An asynchronous command can not expect an SKB to be set. */
 713         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 714
 715         /* An asynchronous command MUST have a callback. */
 716         BUG_ON(!cmd->meta.u.callback);
 717
 718         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 719                 return -EBUSY;
 720
 721         ret = iwl4965_enqueue_hcmd(priv, cmd);
 722         if (ret < 0) {
 723                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 724                           get_cmd_string(cmd->id), ret);
 725                 return ret;
 726         }
 727         return 0;
 728 }
 729
 730 static int iwl4965_send_cmd_sync(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 731 {
 732         int cmd_idx;
 733         int ret;
 734         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 735
 736         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 737
 738          /* A synchronous command can not have a callback set. */
 739         BUG_ON(cmd->meta.u.callback != NULL);
 740
 741         if (atomic_xchg(&entry, 1)) {
 742                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 743                           get_cmd_string(cmd->id));
 744                 return -EBUSY;
 745         }
 746
 747         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 748
 749         if (cmd->meta.flags & CMD_WANT_SKB)
 750                 cmd->meta.source = &cmd->meta;
 751
 752         cmd_idx = iwl4965_enqueue_hcmd(priv, cmd);
 753         if (cmd_idx < 0) {
 754                 ret = cmd_idx;
 755                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 756                           get_cmd_string(cmd->id), ret);
 757                 goto out;
 758         }
 759
 760         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 761                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 762                         HOST_COMPLETE_TIMEOUT);
 763         if (!ret) {
 764                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 765                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 766                                   get_cmd_string(cmd->id),
 767                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 768
 769                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 770                         ret = -ETIMEDOUT;
 771                         goto cancel;
 772                 }
 773         }
 774
 775         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 776                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 777                                get_cmd_string(cmd->id));
 778                 ret = -ECANCELED;
 779                 goto fail;
 780         }
 781         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 782                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 783                                get_cmd_string(cmd->id));
 784                 ret = -EIO;
 785                 goto fail;
 786         }
 787         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 788                 IWL_ERROR("Error: Response NULL in '%s'\n",
 789                           get_cmd_string(cmd->id));
 790                 ret = -EIO;
 791                 goto out;
 792         }
 793
 794         ret = 0;
 795         goto out;
 796
 797 cancel:
 798         if (cmd->meta.flags & CMD_WANT_SKB) {
 799                 struct iwl4965_cmd *qcmd;
 800
 801                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 802                  * TX cmd queue. Otherwise in case the cmd comes
 803                  * in later, it will possibly set an invalid
 804                  * address (cmd->meta.source). */
 805                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 806                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 807         }
 808 fail:
 809         if (cmd->meta.u.skb) {
 810                 dev_kfree_skb_any(cmd->meta.u.skb);
 811                 cmd->meta.u.skb = NULL;
 812         }
 813 out:
 814         atomic_set(&entry, 0);
 815         return ret;
 816 }
 817
 818 int iwl4965_send_cmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 819 {
 820         if (cmd->meta.flags & CMD_ASYNC)
 821                 return iwl4965_send_cmd_async(priv, cmd);
 822
 823         return iwl4965_send_cmd_sync(priv, cmd);
 824 }
 825
 826 int iwl4965_send_cmd_pdu(struct iwl4965_priv *priv, u8 id, u16 len, const void *data)
 827 {
 828         struct iwl4965_host_cmd cmd = {
 829                 .id = id,
 830                 .len = len,
 831                 .data = data,
 832         };
 833
 834         return iwl4965_send_cmd_sync(priv, &cmd);
 835 }
 836
 837 static int __must_check iwl4965_send_cmd_u32(struct iwl4965_priv *priv, u8 id, u32 val)
 838 {
 839         struct iwl4965_host_cmd cmd = {
 840                 .id = id,
 841                 .len = sizeof(val),
 842                 .data = &val,
 843         };
 844
 845         return iwl4965_send_cmd_sync(priv, &cmd);
 846 }
 847
 848 int iwl4965_send_statistics_request(struct iwl4965_priv *priv)
 849 {
 850         return iwl4965_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 851 }
 852
 853 /**
 854  * iwl4965_rxon_add_station - add station into station table.
 855  *
 856  * there is only one AP station with id= IWL_AP_ID
 857  * NOTE: mutex must be held before calling this fnction
 858  */
 859 static int iwl4965_rxon_add_station(struct iwl4965_priv *priv,
 860                                 const u8 *addr, int is_ap)
 861 {
 862         u8 sta_id;
 863
 864         /* Add station to device's station table */
 865 #ifdef CONFIG_IWL4965_HT
 866         struct ieee80211_conf *conf = &priv->hw->conf;
 867         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 868
 869         if ((is_ap) &&
 870             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 871             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 872                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 873                                                    0, cur_ht_config);
 874         else
 875 #endif /* CONFIG_IWL4965_HT */
 876                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 877                                                    0, NULL);
 878
 879         /* Set up default rate scaling table in device's station table */
 880         iwl4965_add_station(priv, addr, is_ap);
 881
 882         return sta_id;
 883 }
 884
 885 /**
 886  * iwl4965_set_rxon_channel - Set the phymode and channel values in staging RXON
 887  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 888  * @channel: Any channel valid for the requested phymode
 889
 890  * In addition to setting the staging RXON, priv->phymode is also set.
 891  *
 892  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 893  * in the staging RXON flag structure based on the phymode
 894  */
 895 static int iwl4965_set_rxon_channel(struct iwl4965_priv *priv,
 896                                     enum ieee80211_band band,
 897                                  u16 channel)
 898 {
 899         if (!iwl4965_get_channel_info(priv, band, channel)) {
 900                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 901                                channel, band);
 902                 return -EINVAL;
 903         }
 904
 905         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 906             (priv->band == band))
 907                 return 0;
 908
 909         priv->staging_rxon.channel = cpu_to_le16(channel);
 910         if (band == IEEE80211_BAND_5GHZ)
 911                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 912         else
 913                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 914
 915         priv->band = band;
 916
 917         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 918
 919         return 0;
 920 }
 921
 922 /**
 923  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 924  *
 925  * NOTE:  This is really only useful during development and can eventually
 926  * be #ifdef'd out once the driver is stable and folks aren't actively
 927  * making changes
 928  */
 929 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 930 {
 931         int error = 0;
 932         int counter = 1;
 933
 934         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 935                 error |= le32_to_cpu(rxon->flags &
 936                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 937                                  RXON_FLG_RADAR_DETECT_MSK));
 938                 if (error)
 939                         IWL_WARNING("check 24G fields %d | %d\n",
 940                                     counter++, error);
 941         } else {
 942                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 943                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 944                 if (error)
 945                         IWL_WARNING("check 52 fields %d | %d\n",
 946                                     counter++, error);
 947                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 948                 if (error)
 949                         IWL_WARNING("check 52 CCK %d | %d\n",
 950                                     counter++, error);
 951         }
 952         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 953         if (error)
 954                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 955
 956         /* make sure basic rates 6Mbps and 1Mbps are supported */
 957         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 958                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 959         if (error)
 960                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 961
 962         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 963         if (error)
 964                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 965
 966         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 967                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 968         if (error)
 969                 IWL_WARNING("check CCK and short slot %d | %d\n",
 970                             counter++, error);
 971
 972         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 973                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 974         if (error)
 975                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 976                             counter++, error);
 977
 978         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 979                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 980         if (error)
 981                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 982                             counter++, error);
 983
 984         if (error)
 985                 IWL_WARNING("Tuning to channel %d\n",
 986                             le16_to_cpu(rxon->channel));
 987
 988         if (error) {
 989                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 990                 return -1;
 991         }
 992         return 0;
 993 }
 994
 995 /**
 996  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 997  * @priv: staging_rxon is compared to active_rxon
 998  *
 999  * If the RXON structure is changing enough to require a new tune,
1000  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1001  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1002  */
1003 static int iwl4965_full_rxon_required(struct iwl4965_priv *priv)
1004 {
1005
1006         /* These items are only settable from the full RXON command */
1007         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1008             compare_ether_addr(priv->staging_rxon.bssid_addr,
1009                                priv->active_rxon.bssid_addr) ||
1010             compare_ether_addr(priv->staging_rxon.node_addr,
1011                                priv->active_rxon.node_addr) ||
1012             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1013                                priv->active_rxon.wlap_bssid_addr) ||
1014             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1015             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1016             (priv->staging_rxon.air_propagation !=
1017              priv->active_rxon.air_propagation) ||
1018             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
1019              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
1020             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
1021              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
1022             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1023             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1024                 return 1;
1025
1026         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1027          * be updated with the RXON_ASSOC command -- however only some
1028          * flag transitions are allowed using RXON_ASSOC */
1029
1030         /* Check if we are not switching bands */
1031         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1032             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1033                 return 1;
1034
1035         /* Check if we are switching association toggle */
1036         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1037                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1038                 return 1;
1039
1040         return 0;
1041 }
1042
1043 static int iwl4965_send_rxon_assoc(struct iwl4965_priv *priv)
1044 {
1045         int rc = 0;
1046         struct iwl4965_rx_packet *res = NULL;
1047         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1048         struct iwl4965_host_cmd cmd = {
1049                 .id = REPLY_RXON_ASSOC,
1050                 .len = sizeof(rxon_assoc),
1051                 .meta.flags = CMD_WANT_SKB,
1052                 .data = &rxon_assoc,
1053         };
1054         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
1055         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
1056
1057         if ((rxon1->flags == rxon2->flags) &&
1058             (rxon1->filter_flags == rxon2->filter_flags) &&
1059             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1060             (rxon1->ofdm_ht_single_stream_basic_rates ==
1061              rxon2->ofdm_ht_single_stream_basic_rates) &&
1062             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1063              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1064             (rxon1->rx_chain == rxon2->rx_chain) &&
1065             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1066                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1067                 return 0;
1068         }
1069
1070         rxon_assoc.flags = priv->staging_rxon.flags;
1071         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1072         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1073         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1074         rxon_assoc.reserved = 0;
1075         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1076             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1077         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1078             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1079         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1080
1081         rc = iwl4965_send_cmd_sync(priv, &cmd);
1082         if (rc)
1083                 return rc;
1084
1085         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1086         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1087                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1088                 rc = -EIO;
1089         }
1090
1091         priv->alloc_rxb_skb--;
1092         dev_kfree_skb_any(cmd.meta.u.skb);
1093
1094         return rc;
1095 }
1096
1097 /**
1098  * iwl4965_commit_rxon - commit staging_rxon to hardware
1099  *
1100  * The RXON command in staging_rxon is committed to the hardware and
1101  * the active_rxon structure is updated with the new data.  This
1102  * function correctly transitions out of the RXON_ASSOC_MSK state if
1103  * a HW tune is required based on the RXON structure changes.
1104  */
1105 static int iwl4965_commit_rxon(struct iwl4965_priv *priv)
1106 {
1107         /* cast away the const for active_rxon in this function */
1108         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1109         DECLARE_MAC_BUF(mac);
1110         int rc = 0;
1111
1112         if (!iwl4965_is_alive(priv))
1113                 return -1;
1114
1115         /* always get timestamp with Rx frame */
1116         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1117
1118         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
1119         if (rc) {
1120                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1121                 return -EINVAL;
1122         }
1123
1124         /* If we don't need to send a full RXON, we can use
1125          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
1126          * and other flags for the current radio configuration. */
1127         if (!iwl4965_full_rxon_required(priv)) {
1128                 rc = iwl4965_send_rxon_assoc(priv);
1129                 if (rc) {
1130                         IWL_ERROR("Error setting RXON_ASSOC "
1131                                   "configuration (%d).\n", rc);
1132                         return rc;
1133                 }
1134
1135                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1136
1137                 return 0;
1138         }
1139
1140         /* station table will be cleared */
1141         priv->assoc_station_added = 0;
1142
1143 #ifdef CONFIG_IWL4965_SENSITIVITY
1144         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1145         if (!priv->error_recovering)
1146                 priv->start_calib = 0;
1147
1148         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1149 #endif /* CONFIG_IWL4965_SENSITIVITY */
1150
1151         /* If we are currently associated and the new config requires
1152          * an RXON_ASSOC and the new config wants the associated mask enabled,
1153          * we must clear the associated from the active configuration
1154          * before we apply the new config */
1155         if (iwl4965_is_associated(priv) &&
1156             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1157                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1158                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1159
1160                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1161                                       sizeof(struct iwl4965_rxon_cmd),
1162                                       &priv->active_rxon);
1163
1164                 /* If the mask clearing failed then we set
1165                  * active_rxon back to what it was previously */
1166                 if (rc) {
1167                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1168                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1169                                   "configuration (%d).\n", rc);
1170                         return rc;
1171                 }
1172         }
1173
1174         IWL_DEBUG_INFO("Sending RXON\n"
1175                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1176                        "* channel = %d\n"
1177                        "* bssid = %s\n",
1178                        ((priv->staging_rxon.filter_flags &
1179                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1180                        le16_to_cpu(priv->staging_rxon.channel),
1181                        print_mac(mac, priv->staging_rxon.bssid_addr));
1182
1183         /* Apply the new configuration */
1184         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1185                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
1186         if (rc) {
1187                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1188                 return rc;
1189         }
1190
1191         iwl4965_clear_stations_table(priv);
1192
1193 #ifdef CONFIG_IWL4965_SENSITIVITY
1194         if (!priv->error_recovering)
1195                 priv->start_calib = 0;
1196
1197         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1198         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1199 #endif /* CONFIG_IWL4965_SENSITIVITY */
1200
1201         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1202
1203         /* If we issue a new RXON command which required a tune then we must
1204          * send a new TXPOWER command or we won't be able to Tx any frames */
1205         rc = iwl4965_hw_reg_send_txpower(priv);
1206         if (rc) {
1207                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1208                 return rc;
1209         }
1210
1211         /* Add the broadcast address so we can send broadcast frames */
1212         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
1213             IWL_INVALID_STATION) {
1214                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1215                 return -EIO;
1216         }
1217
1218         /* If we have set the ASSOC_MSK and we are in BSS mode then
1219          * add the IWL_AP_ID to the station rate table */
1220         if (iwl4965_is_associated(priv) &&
1221             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1222                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1223                     == IWL_INVALID_STATION) {
1224                         IWL_ERROR("Error adding AP address for transmit.\n");
1225                         return -EIO;
1226                 }
1227                 priv->assoc_station_added = 1;
1228         }
1229
1230         return 0;
1231 }
1232
1233 static int iwl4965_send_bt_config(struct iwl4965_priv *priv)
1234 {
1235         struct iwl4965_bt_cmd bt_cmd = {
1236                 .flags = 3,
1237                 .lead_time = 0xAA,
1238                 .max_kill = 1,
1239                 .kill_ack_mask = 0,
1240                 .kill_cts_mask = 0,
1241         };
1242
1243         return iwl4965_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1244                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
1245 }
1246
1247 static int iwl4965_send_scan_abort(struct iwl4965_priv *priv)
1248 {
1249         int rc = 0;
1250         struct iwl4965_rx_packet *res;
1251         struct iwl4965_host_cmd cmd = {
1252                 .id = REPLY_SCAN_ABORT_CMD,
1253                 .meta.flags = CMD_WANT_SKB,
1254         };
1255
1256         /* If there isn't a scan actively going on in the hardware
1257          * then we are in between scan bands and not actually
1258          * actively scanning, so don't send the abort command */
1259         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1260                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1261                 return 0;
1262         }
1263
1264         rc = iwl4965_send_cmd_sync(priv, &cmd);
1265         if (rc) {
1266                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1267                 return rc;
1268         }
1269
1270         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1271         if (res->u.status != CAN_ABORT_STATUS) {
1272                 /* The scan abort will return 1 for success or
1273                  * 2 for "failure".  A failure condition can be
1274                  * due to simply not being in an active scan which
1275                  * can occur if we send the scan abort before we
1276                  * the microcode has notified us that a scan is
1277                  * completed. */
1278                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1279                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1280                 clear_bit(STATUS_SCAN_HW, &priv->status);
1281         }
1282
1283         dev_kfree_skb_any(cmd.meta.u.skb);
1284
1285         return rc;
1286 }
1287
1288 static int iwl4965_card_state_sync_callback(struct iwl4965_priv *priv,
1289                                         struct iwl4965_cmd *cmd,
1290                                         struct sk_buff *skb)
1291 {
1292         return 1;
1293 }
1294
1295 /*
1296  * CARD_STATE_CMD
1297  *
1298  * Use: Sets the device's internal card state to enable, disable, or halt
1299  *
1300  * When in the 'enable' state the card operates as normal.
1301  * When in the 'disable' state, the card enters into a low power mode.
1302  * When in the 'halt' state, the card is shut down and must be fully
1303  * restarted to come back on.
1304  */
1305 static int iwl4965_send_card_state(struct iwl4965_priv *priv, u32 flags, u8 meta_flag)
1306 {
1307         struct iwl4965_host_cmd cmd = {
1308                 .id = REPLY_CARD_STATE_CMD,
1309                 .len = sizeof(u32),
1310                 .data = &flags,
1311                 .meta.flags = meta_flag,
1312         };
1313
1314         if (meta_flag & CMD_ASYNC)
1315                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1316
1317         return iwl4965_send_cmd(priv, &cmd);
1318 }
1319
1320 static int iwl4965_add_sta_sync_callback(struct iwl4965_priv *priv,
1321                                      struct iwl4965_cmd *cmd, struct sk_buff *skb)
1322 {
1323         struct iwl4965_rx_packet *res = NULL;
1324
1325         if (!skb) {
1326                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1327                 return 1;
1328         }
1329
1330         res = (struct iwl4965_rx_packet *)skb->data;
1331         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1332                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1333                           res->hdr.flags);
1334                 return 1;
1335         }
1336
1337         switch (res->u.add_sta.status) {
1338         case ADD_STA_SUCCESS_MSK:
1339                 break;
1340         default:
1341                 break;
1342         }
1343
1344         /* We didn't cache the SKB; let the caller free it */
1345         return 1;
1346 }
1347
1348 int iwl4965_send_add_station(struct iwl4965_priv *priv,
1349                          struct iwl4965_addsta_cmd *sta, u8 flags)
1350 {
1351         struct iwl4965_rx_packet *res = NULL;
1352         int rc = 0;
1353         struct iwl4965_host_cmd cmd = {
1354                 .id = REPLY_ADD_STA,
1355                 .len = sizeof(struct iwl4965_addsta_cmd),
1356                 .meta.flags = flags,
1357                 .data = sta,
1358         };
1359
1360         if (flags & CMD_ASYNC)
1361                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1362         else
1363                 cmd.meta.flags |= CMD_WANT_SKB;
1364
1365         rc = iwl4965_send_cmd(priv, &cmd);
1366
1367         if (rc || (flags & CMD_ASYNC))
1368                 return rc;
1369
1370         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1371         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1372                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1373                           res->hdr.flags);
1374                 rc = -EIO;
1375         }
1376
1377         if (rc == 0) {
1378                 switch (res->u.add_sta.status) {
1379                 case ADD_STA_SUCCESS_MSK:
1380                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1381                         break;
1382                 default:
1383                         rc = -EIO;
1384                         IWL_WARNING("REPLY_ADD_STA failed\n");
1385                         break;
1386                 }
1387         }
1388
1389         priv->alloc_rxb_skb--;
1390         dev_kfree_skb_any(cmd.meta.u.skb);
1391
1392         return rc;
1393 }
1394
1395 static int iwl4965_update_sta_key_info(struct iwl4965_priv *priv,
1396                                    struct ieee80211_key_conf *keyconf,
1397                                    u8 sta_id)
1398 {
1399         unsigned long flags;
1400         __le16 key_flags = 0;
1401
1402         switch (keyconf->alg) {
1403         case ALG_CCMP:
1404                 key_flags |= STA_KEY_FLG_CCMP;
1405                 key_flags |= cpu_to_le16(
1406                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1407                 key_flags &= ~STA_KEY_FLG_INVALID;
1408                 break;
1409         case ALG_TKIP:
1410         case ALG_WEP:
1411         default:
1412                 return -EINVAL;
1413         }
1414         spin_lock_irqsave(&priv->sta_lock, flags);
1415         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1416         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1417         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1418                keyconf->keylen);
1419
1420         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1421                keyconf->keylen);
1422         priv->stations[sta_id].sta.key.key_flags = key_flags;
1423         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1424         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1425
1426         spin_unlock_irqrestore(&priv->sta_lock, flags);
1427
1428         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1429         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1430         return 0;
1431 }
1432
1433 static int iwl4965_clear_sta_key_info(struct iwl4965_priv *priv, u8 sta_id)
1434 {
1435         unsigned long flags;
1436
1437         spin_lock_irqsave(&priv->sta_lock, flags);
1438         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1439         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1440         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1441         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1442         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1443         spin_unlock_irqrestore(&priv->sta_lock, flags);
1444
1445         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1446         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1447         return 0;
1448 }
1449
1450 static void iwl4965_clear_free_frames(struct iwl4965_priv *priv)
1451 {
1452         struct list_head *element;
1453
1454         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1455                        priv->frames_count);
1456
1457         while (!list_empty(&priv->free_frames)) {
1458                 element = priv->free_frames.next;
1459                 list_del(element);
1460                 kfree(list_entry(element, struct iwl4965_frame, list));
1461                 priv->frames_count--;
1462         }
1463
1464         if (priv->frames_count) {
1465                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1466                             priv->frames_count);
1467                 priv->frames_count = 0;
1468         }
1469 }
1470
1471 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl4965_priv *priv)
1472 {
1473         struct iwl4965_frame *frame;
1474         struct list_head *element;
1475         if (list_empty(&priv->free_frames)) {
1476                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1477                 if (!frame) {
1478                         IWL_ERROR("Could not allocate frame!\n");
1479                         return NULL;
1480                 }
1481
1482                 priv->frames_count++;
1483                 return frame;
1484         }
1485
1486         element = priv->free_frames.next;
1487         list_del(element);
1488         return list_entry(element, struct iwl4965_frame, list);
1489 }
1490
1491 static void iwl4965_free_frame(struct iwl4965_priv *priv, struct iwl4965_frame *frame)
1492 {
1493         memset(frame, 0, sizeof(*frame));
1494         list_add(&frame->list, &priv->free_frames);
1495 }
1496
1497 unsigned int iwl4965_fill_beacon_frame(struct iwl4965_priv *priv,
1498                                 struct ieee80211_hdr *hdr,
1499                                 const u8 *dest, int left)
1500 {
1501
1502         if (!iwl4965_is_associated(priv) || !priv->ibss_beacon ||
1503             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1504              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1505                 return 0;
1506
1507         if (priv->ibss_beacon->len > left)
1508                 return 0;
1509
1510         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1511
1512         return priv->ibss_beacon->len;
1513 }
1514
1515 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1516 {
1517         u8 i;
1518
1519         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1520              i = iwl4965_rates[i].next_ieee) {
1521                 if (rate_mask & (1 << i))
1522                         return iwl4965_rates[i].plcp;
1523         }
1524
1525         return IWL_RATE_INVALID;
1526 }
1527
1528 static int iwl4965_send_beacon_cmd(struct iwl4965_priv *priv)
1529 {
1530         struct iwl4965_frame *frame;
1531         unsigned int frame_size;
1532         int rc;
1533         u8 rate;
1534
1535         frame = iwl4965_get_free_frame(priv);
1536
1537         if (!frame) {
1538                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1539                           "command.\n");
1540                 return -ENOMEM;
1541         }
1542
1543         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1544                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1545                                                 0xFF0);
1546                 if (rate == IWL_INVALID_RATE)
1547                         rate = IWL_RATE_6M_PLCP;
1548         } else {
1549                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1550                 if (rate == IWL_INVALID_RATE)
1551                         rate = IWL_RATE_1M_PLCP;
1552         }
1553
1554         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1555
1556         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1557                               &frame->u.cmd[0]);
1558
1559         iwl4965_free_frame(priv, frame);
1560
1561         return rc;
1562 }
1563
1564 /******************************************************************************
1565  *
1566  * Misc. internal state and helper functions
1567  *
1568  ******************************************************************************/
1569
1570 static void iwl4965_unset_hw_setting(struct iwl4965_priv *priv)
1571 {
1572         if (priv->hw_setting.shared_virt)
1573                 pci_free_consistent(priv->pci_dev,
1574                                     sizeof(struct iwl4965_shared),
1575                                     priv->hw_setting.shared_virt,
1576                                     priv->hw_setting.shared_phys);
1577 }
1578
1579 /**
1580  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1581  *
1582  * return : set the bit for each supported rate insert in ie
1583  */
1584 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1585                                     u16 basic_rate, int *left)
1586 {
1587         u16 ret_rates = 0, bit;
1588         int i;
1589         u8 *cnt = ie;
1590         u8 *rates = ie + 1;
1591
1592         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1593                 if (bit & supported_rate) {
1594                         ret_rates |= bit;
1595                         rates[*cnt] = iwl4965_rates[i].ieee |
1596                                 ((bit & basic_rate) ? 0x80 : 0x00);
1597                         (*cnt)++;
1598                         (*left)--;
1599                         if ((*left <= 0) ||
1600                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1601                                 break;
1602                 }
1603         }
1604
1605         return ret_rates;
1606 }
1607
1608 /**
1609  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1610  */
1611 static u16 iwl4965_fill_probe_req(struct iwl4965_priv *priv,
1612                                   enum ieee80211_band band,
1613                                   struct ieee80211_mgmt *frame,
1614                                   int left, int is_direct)
1615 {
1616         int len = 0;
1617         u8 *pos = NULL;
1618         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1619 #ifdef CONFIG_IWL4965_HT
1620         const struct ieee80211_supported_band *sband =
1621                                                 iwl4965_get_hw_mode(priv, band);
1622 #endif /* CONFIG_IWL4965_HT */
1623
1624         /* Make sure there is enough space for the probe request,
1625          * two mandatory IEs and the data */
1626         left -= 24;
1627         if (left < 0)
1628                 return 0;
1629         len += 24;
1630
1631         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1632         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1633         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1634         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1635         frame->seq_ctrl = 0;
1636
1637         /* fill in our indirect SSID IE */
1638         /* ...next IE... */
1639
1640         left -= 2;
1641         if (left < 0)
1642                 return 0;
1643         len += 2;
1644         pos = &(frame->u.probe_req.variable[0]);
1645         *pos++ = WLAN_EID_SSID;
1646         *pos++ = 0;
1647
1648         /* fill in our direct SSID IE... */
1649         if (is_direct) {
1650                 /* ...next IE... */
1651                 left -= 2 + priv->essid_len;
1652                 if (left < 0)
1653                         return 0;
1654                 /* ... fill it in... */
1655                 *pos++ = WLAN_EID_SSID;
1656                 *pos++ = priv->essid_len;
1657                 memcpy(pos, priv->essid, priv->essid_len);
1658                 pos += priv->essid_len;
1659                 len += 2 + priv->essid_len;
1660         }
1661
1662         /* fill in supported rate */
1663         /* ...next IE... */
1664         left -= 2;
1665         if (left < 0)
1666                 return 0;
1667
1668         /* ... fill it in... */
1669         *pos++ = WLAN_EID_SUPP_RATES;
1670         *pos = 0;
1671
1672         /* exclude 60M rate */
1673         active_rates = priv->rates_mask;
1674         active_rates &= ~IWL_RATE_60M_MASK;
1675
1676         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1677
1678         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1679         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1680                         active_rate_basic, &left);
1681         active_rates &= ~ret_rates;
1682
1683         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1684                                  active_rate_basic, &left);
1685         active_rates &= ~ret_rates;
1686
1687         len += 2 + *pos;
1688         pos += (*pos) + 1;
1689         if (active_rates == 0)
1690                 goto fill_end;
1691
1692         /* fill in supported extended rate */
1693         /* ...next IE... */
1694         left -= 2;
1695         if (left < 0)
1696                 return 0;
1697         /* ... fill it in... */
1698         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1699         *pos = 0;
1700         iwl4965_supported_rate_to_ie(pos, active_rates,
1701                                  active_rate_basic, &left);
1702         if (*pos > 0)
1703                 len += 2 + *pos;
1704
1705 #ifdef CONFIG_IWL4965_HT
1706         if (sband && sband->ht_info.ht_supported) {
1707                 struct ieee80211_ht_cap *ht_cap;
1708                 pos += (*pos) + 1;
1709                 *pos++ = WLAN_EID_HT_CAPABILITY;
1710                 *pos++ = sizeof(struct ieee80211_ht_cap);
1711                 ht_cap = (struct ieee80211_ht_cap *)pos;
1712                 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1713                 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1714                 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1715                                             IEEE80211_HT_CAP_AMPDU_FACTOR) |
1716                                             ((sband->ht_info.ampdu_density << 2) &
1717                                             IEEE80211_HT_CAP_AMPDU_DENSITY);
1718                 len += 2 + sizeof(struct ieee80211_ht_cap);
1719         }
1720 #endif  /*CONFIG_IWL4965_HT */
1721
1722  fill_end:
1723         return (u16)len;
1724 }
1725
1726 /*
1727  * QoS  support
1728 */
1729 static int iwl4965_send_qos_params_command(struct iwl4965_priv *priv,
1730                                        struct iwl4965_qosparam_cmd *qos)
1731 {
1732
1733         return iwl4965_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1734                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1735 }
1736
1737 static void iwl4965_reset_qos(struct iwl4965_priv *priv)
1738 {
1739         u16 cw_min = 15;
1740         u16 cw_max = 1023;
1741         u8 aifs = 2;
1742         u8 is_legacy = 0;
1743         unsigned long flags;
1744         int i;
1745
1746         spin_lock_irqsave(&priv->lock, flags);
1747         priv->qos_data.qos_active = 0;
1748
1749         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1750                 if (priv->qos_data.qos_enable)
1751                         priv->qos_data.qos_active = 1;
1752                 if (!(priv->active_rate & 0xfff0)) {
1753                         cw_min = 31;
1754                         is_legacy = 1;
1755                 }
1756         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1757                 if (priv->qos_data.qos_enable)
1758                         priv->qos_data.qos_active = 1;
1759         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1760                 cw_min = 31;
1761                 is_legacy = 1;
1762         }
1763
1764         if (priv->qos_data.qos_active)
1765                 aifs = 3;
1766
1767         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1768         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1769         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1770         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1771         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1772
1773         if (priv->qos_data.qos_active) {
1774                 i = 1;
1775                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1776                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1777                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1778                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1779                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1780
1781                 i = 2;
1782                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1783                         cpu_to_le16((cw_min + 1) / 2 - 1);
1784                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1785                         cpu_to_le16(cw_max);
1786                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1787                 if (is_legacy)
1788                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1789                                 cpu_to_le16(6016);
1790                 else
1791                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1792                                 cpu_to_le16(3008);
1793                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1794
1795                 i = 3;
1796                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1797                         cpu_to_le16((cw_min + 1) / 4 - 1);
1798                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1799                         cpu_to_le16((cw_max + 1) / 2 - 1);
1800                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1801                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1802                 if (is_legacy)
1803                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1804                                 cpu_to_le16(3264);
1805                 else
1806                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1807                                 cpu_to_le16(1504);
1808         } else {
1809                 for (i = 1; i < 4; i++) {
1810                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1811                                 cpu_to_le16(cw_min);
1812                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1813                                 cpu_to_le16(cw_max);
1814                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1815                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1816                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1817                 }
1818         }
1819         IWL_DEBUG_QOS("set QoS to default \n");
1820
1821         spin_unlock_irqrestore(&priv->lock, flags);
1822 }
1823
1824 static void iwl4965_activate_qos(struct iwl4965_priv *priv, u8 force)
1825 {
1826         unsigned long flags;
1827
1828         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1829                 return;
1830
1831         if (!priv->qos_data.qos_enable)
1832                 return;
1833
1834         spin_lock_irqsave(&priv->lock, flags);
1835         priv->qos_data.def_qos_parm.qos_flags = 0;
1836
1837         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1838             !priv->qos_data.qos_cap.q_AP.txop_request)
1839                 priv->qos_data.def_qos_parm.qos_flags |=
1840                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1841         if (priv->qos_data.qos_active)
1842                 priv->qos_data.def_qos_parm.qos_flags |=
1843                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1844
1845 #ifdef CONFIG_IWL4965_HT
1846         if (priv->current_ht_config.is_ht)
1847                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1848 #endif /* CONFIG_IWL4965_HT */
1849
1850         spin_unlock_irqrestore(&priv->lock, flags);
1851
1852         if (force || iwl4965_is_associated(priv)) {
1853                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1854                                 priv->qos_data.qos_active,
1855                                 priv->qos_data.def_qos_parm.qos_flags);
1856
1857                 iwl4965_send_qos_params_command(priv,
1858                                 &(priv->qos_data.def_qos_parm));
1859         }
1860 }
1861
1862 /*
1863  * Power management (not Tx power!) functions
1864  */
1865 #define MSEC_TO_USEC 1024
1866
1867 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1868 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1869 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1870 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1871                                      __constant_cpu_to_le32(X1), \
1872                                      __constant_cpu_to_le32(X2), \
1873                                      __constant_cpu_to_le32(X3), \
1874                                      __constant_cpu_to_le32(X4)}
1875
1876
1877 /* default power management (not Tx power) table values */
1878 /* for tim  0-10 */
1879 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1880         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1881         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1882         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1883         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1884         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1885         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1886 };
1887
1888 /* for tim > 10 */
1889 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1890         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1891         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1892                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1893         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1894                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1895         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1896                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1897         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1898         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1899                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1900 };
1901
1902 int iwl4965_power_init_handle(struct iwl4965_priv *priv)
1903 {
1904         int rc = 0, i;
1905         struct iwl4965_power_mgr *pow_data;
1906         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1907         u16 pci_pm;
1908
1909         IWL_DEBUG_POWER("Initialize power \n");
1910
1911         pow_data = &(priv->power_data);
1912
1913         memset(pow_data, 0, sizeof(*pow_data));
1914
1915         pow_data->active_index = IWL_POWER_RANGE_0;
1916         pow_data->dtim_val = 0xffff;
1917
1918         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1919         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1920
1921         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1922         if (rc != 0)
1923                 return 0;
1924         else {
1925                 struct iwl4965_powertable_cmd *cmd;
1926
1927                 IWL_DEBUG_POWER("adjust power command flags\n");
1928
1929                 for (i = 0; i < IWL_POWER_AC; i++) {
1930                         cmd = &pow_data->pwr_range_0[i].cmd;
1931
1932                         if (pci_pm & 0x1)
1933                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1934                         else
1935                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1936                 }
1937         }
1938         return rc;
1939 }
1940
1941 static int iwl4965_update_power_cmd(struct iwl4965_priv *priv,
1942                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
1943 {
1944         int rc = 0, i;
1945         u8 skip;
1946         u32 max_sleep = 0;
1947         struct iwl4965_power_vec_entry *range;
1948         u8 period = 0;
1949         struct iwl4965_power_mgr *pow_data;
1950
1951         if (mode > IWL_POWER_INDEX_5) {
1952                 IWL_DEBUG_POWER("Error invalid power mode \n");
1953                 return -1;
1954         }
1955         pow_data = &(priv->power_data);
1956
1957         if (pow_data->active_index == IWL_POWER_RANGE_0)
1958                 range = &pow_data->pwr_range_0[0];
1959         else
1960                 range = &pow_data->pwr_range_1[1];
1961
1962         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1963
1964 #ifdef IWL_MAC80211_DISABLE
1965         if (priv->assoc_network != NULL) {
1966                 unsigned long flags;
1967
1968                 period = priv->assoc_network->tim.tim_period;
1969         }
1970 #endif  /*IWL_MAC80211_DISABLE */
1971         skip = range[mode].no_dtim;
1972
1973         if (period == 0) {
1974                 period = 1;
1975                 skip = 0;
1976         }
1977
1978         if (skip == 0) {
1979                 max_sleep = period;
1980                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1981         } else {
1982                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1983                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1984                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1985         }
1986
1987         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1988                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1989                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1990         }
1991
1992         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1993         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1994         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1995         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1996                         le32_to_cpu(cmd->sleep_interval[0]),
1997                         le32_to_cpu(cmd->sleep_interval[1]),
1998                         le32_to_cpu(cmd->sleep_interval[2]),
1999                         le32_to_cpu(cmd->sleep_interval[3]),
2000                         le32_to_cpu(cmd->sleep_interval[4]));
2001
2002         return rc;
2003 }
2004
2005 static int iwl4965_send_power_mode(struct iwl4965_priv *priv, u32 mode)
2006 {
2007         u32 uninitialized_var(final_mode);
2008         int rc;
2009         struct iwl4965_powertable_cmd cmd;
2010
2011         /* If on battery, set to 3,
2012          * if plugged into AC power, set to CAM ("continuously aware mode"),
2013          * else user level */
2014         switch (mode) {
2015         case IWL_POWER_BATTERY:
2016                 final_mode = IWL_POWER_INDEX_3;
2017                 break;
2018         case IWL_POWER_AC:
2019                 final_mode = IWL_POWER_MODE_CAM;
2020                 break;
2021         default:
2022                 final_mode = mode;
2023                 break;
2024         }
2025
2026         cmd.keep_alive_beacons = 0;
2027
2028         iwl4965_update_power_cmd(priv, &cmd, final_mode);
2029
2030         rc = iwl4965_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2031
2032         if (final_mode == IWL_POWER_MODE_CAM)
2033                 clear_bit(STATUS_POWER_PMI, &priv->status);
2034         else
2035                 set_bit(STATUS_POWER_PMI, &priv->status);
2036
2037         return rc;
2038 }
2039
2040 int iwl4965_is_network_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
2041 {
2042         /* Filter incoming packets to determine if they are targeted toward
2043          * this network, discarding packets coming from ourselves */
2044         switch (priv->iw_mode) {
2045         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2046                 /* packets from our adapter are dropped (echo) */
2047                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2048                         return 0;
2049                 /* {broad,multi}cast packets to our IBSS go through */
2050                 if (is_multicast_ether_addr(header->addr1))
2051                         return !compare_ether_addr(header->addr3, priv->bssid);
2052                 /* packets to our adapter go through */
2053                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2054         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2055                 /* packets from our adapter are dropped (echo) */
2056                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2057                         return 0;
2058                 /* {broad,multi}cast packets to our BSS go through */
2059                 if (is_multicast_ether_addr(header->addr1))
2060                         return !compare_ether_addr(header->addr2, priv->bssid);
2061                 /* packets to our adapter go through */
2062                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2063         }
2064
2065         return 1;
2066 }
2067
2068 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2069
2070 static const char *iwl4965_get_tx_fail_reason(u32 status)
2071 {
2072         switch (status & TX_STATUS_MSK) {
2073         case TX_STATUS_SUCCESS:
2074                 return "SUCCESS";
2075                 TX_STATUS_ENTRY(SHORT_LIMIT);
2076                 TX_STATUS_ENTRY(LONG_LIMIT);
2077                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2078                 TX_STATUS_ENTRY(MGMNT_ABORT);
2079                 TX_STATUS_ENTRY(NEXT_FRAG);
2080                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2081                 TX_STATUS_ENTRY(DEST_PS);
2082                 TX_STATUS_ENTRY(ABORTED);
2083                 TX_STATUS_ENTRY(BT_RETRY);
2084                 TX_STATUS_ENTRY(STA_INVALID);
2085                 TX_STATUS_ENTRY(FRAG_DROPPED);
2086                 TX_STATUS_ENTRY(TID_DISABLE);
2087                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2088                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2089                 TX_STATUS_ENTRY(TX_LOCKED);
2090                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2091         }
2092
2093         return "UNKNOWN";
2094 }
2095
2096 /**
2097  * iwl4965_scan_cancel - Cancel any currently executing HW scan
2098  *
2099  * NOTE: priv->mutex is not required before calling this function
2100  */
2101 static int iwl4965_scan_cancel(struct iwl4965_priv *priv)
2102 {
2103         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2104                 clear_bit(STATUS_SCANNING, &priv->status);
2105                 return 0;
2106         }
2107
2108         if (test_bit(STATUS_SCANNING, &priv->status)) {
2109                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2110                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2111                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2112                         queue_work(priv->workqueue, &priv->abort_scan);
2113
2114                 } else
2115                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2116
2117                 return test_bit(STATUS_SCANNING, &priv->status);
2118         }
2119
2120         return 0;
2121 }
2122
2123 /**
2124  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
2125  * @ms: amount of time to wait (in milliseconds) for scan to abort
2126  *
2127  * NOTE: priv->mutex must be held before calling this function
2128  */
2129 static int iwl4965_scan_cancel_timeout(struct iwl4965_priv *priv, unsigned long ms)
2130 {
2131         unsigned long now = jiffies;
2132         int ret;
2133
2134         ret = iwl4965_scan_cancel(priv);
2135         if (ret && ms) {
2136                 mutex_unlock(&priv->mutex);
2137                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2138                                 test_bit(STATUS_SCANNING, &priv->status))
2139                         msleep(1);
2140                 mutex_lock(&priv->mutex);
2141
2142                 return test_bit(STATUS_SCANNING, &priv->status);
2143         }
2144
2145         return ret;
2146 }
2147
2148 static void iwl4965_sequence_reset(struct iwl4965_priv *priv)
2149 {
2150         /* Reset ieee stats */
2151
2152         /* We don't reset the net_device_stats (ieee->stats) on
2153          * re-association */
2154
2155         priv->last_seq_num = -1;
2156         priv->last_frag_num = -1;
2157         priv->last_packet_time = 0;
2158
2159         iwl4965_scan_cancel(priv);
2160 }
2161
2162 #define MAX_UCODE_BEACON_INTERVAL       4096
2163 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2164
2165 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
2166 {
2167         u16 new_val = 0;
2168         u16 beacon_factor = 0;
2169
2170         beacon_factor =
2171             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2172                 / MAX_UCODE_BEACON_INTERVAL;
2173         new_val = beacon_val / beacon_factor;
2174
2175         return cpu_to_le16(new_val);
2176 }
2177
2178 static void iwl4965_setup_rxon_timing(struct iwl4965_priv *priv)
2179 {
2180         u64 interval_tm_unit;
2181         u64 tsf, result;
2182         unsigned long flags;
2183         struct ieee80211_conf *conf = NULL;
2184         u16 beacon_int = 0;
2185
2186         conf = ieee80211_get_hw_conf(priv->hw);
2187
2188         spin_lock_irqsave(&priv->lock, flags);
2189         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2190         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2191
2192         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2193
2194         tsf = priv->timestamp1;
2195         tsf = ((tsf << 32) | priv->timestamp0);
2196
2197         beacon_int = priv->beacon_int;
2198         spin_unlock_irqrestore(&priv->lock, flags);
2199
2200         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2201                 if (beacon_int == 0) {
2202                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2203                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2204                 } else {
2205                         priv->rxon_timing.beacon_interval =
2206                                 cpu_to_le16(beacon_int);
2207                         priv->rxon_timing.beacon_interval =
2208                             iwl4965_adjust_beacon_interval(
2209                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2210                 }
2211
2212                 priv->rxon_timing.atim_window = 0;
2213         } else {
2214                 priv->rxon_timing.beacon_interval =
2215                         iwl4965_adjust_beacon_interval(conf->beacon_int);
2216                 /* TODO: we need to get atim_window from upper stack
2217                  * for now we set to 0 */
2218                 priv->rxon_timing.atim_window = 0;
2219         }
2220
2221         interval_tm_unit =
2222                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2223         result = do_div(tsf, interval_tm_unit);
2224         priv->rxon_timing.beacon_init_val =
2225             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2226
2227         IWL_DEBUG_ASSOC
2228             ("beacon interval %d beacon timer %d beacon tim %d\n",
2229                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2230                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2231                 le16_to_cpu(priv->rxon_timing.atim_window));
2232 }
2233
2234 static int iwl4965_scan_initiate(struct iwl4965_priv *priv)
2235 {
2236         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2237                 IWL_ERROR("APs don't scan.\n");
2238                 return 0;
2239         }
2240
2241         if (!iwl4965_is_ready_rf(priv)) {
2242                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2243                 return -EIO;
2244         }
2245
2246         if (test_bit(STATUS_SCANNING, &priv->status)) {
2247                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2248                 return -EAGAIN;
2249         }
2250
2251         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2252                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2253                                "Queuing.\n");
2254                 return -EAGAIN;
2255         }
2256
2257         IWL_DEBUG_INFO("Starting scan...\n");
2258         priv->scan_bands = 2;
2259         set_bit(STATUS_SCANNING, &priv->status);
2260         priv->scan_start = jiffies;
2261         priv->scan_pass_start = priv->scan_start;
2262
2263         queue_work(priv->workqueue, &priv->request_scan);
2264
2265         return 0;
2266 }
2267
2268 static int iwl4965_set_rxon_hwcrypto(struct iwl4965_priv *priv, int hw_decrypt)
2269 {
2270         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
2271
2272         if (hw_decrypt)
2273                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2274         else
2275                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2276
2277         return 0;
2278 }
2279
2280 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv,
2281                                           enum ieee80211_band band)
2282 {
2283         if (band == IEEE80211_BAND_5GHZ) {
2284                 priv->staging_rxon.flags &=
2285                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2286                       | RXON_FLG_CCK_MSK);
2287                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2288         } else {
2289                 /* Copied from iwl4965_bg_post_associate() */
2290                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2291                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2292                 else
2293                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2294
2295                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2296                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2297
2298                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2299                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2300                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2301         }
2302 }
2303
2304 /*
2305  * initialize rxon structure with default values from eeprom
2306  */
2307 static void iwl4965_connection_init_rx_config(struct iwl4965_priv *priv)
2308 {
2309         const struct iwl4965_channel_info *ch_info;
2310
2311         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2312
2313         switch (priv->iw_mode) {
2314         case IEEE80211_IF_TYPE_AP:
2315                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2316                 break;
2317
2318         case IEEE80211_IF_TYPE_STA:
2319                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2320                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2321                 break;
2322
2323         case IEEE80211_IF_TYPE_IBSS:
2324                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2325                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2326                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2327                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2328                 break;
2329
2330         case IEEE80211_IF_TYPE_MNTR:
2331                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2332                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2333                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2334                 break;
2335         }
2336
2337 #if 0
2338         /* TODO:  Figure out when short_preamble would be set and cache from
2339          * that */
2340         if (!hw_to_local(priv->hw)->short_preamble)
2341                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2342         else
2343                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2344 #endif
2345
2346         ch_info = iwl4965_get_channel_info(priv, priv->band,
2347                                        le16_to_cpu(priv->staging_rxon.channel));
2348
2349         if (!ch_info)
2350                 ch_info = &priv->channel_info[0];
2351
2352         /*
2353          * in some case A channels are all non IBSS
2354          * in this case force B/G channel
2355          */
2356         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2357             !(is_channel_ibss(ch_info)))
2358                 ch_info = &priv->channel_info[0];
2359
2360         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2361         priv->band = ch_info->band;
2362
2363         iwl4965_set_flags_for_phymode(priv, priv->band);
2364
2365         priv->staging_rxon.ofdm_basic_rates =
2366             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2367         priv->staging_rxon.cck_basic_rates =
2368             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2369
2370         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2371                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2372         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2373         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2374         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2375         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2376         iwl4965_set_rxon_chain(priv);
2377 }
2378
2379 static int iwl4965_set_mode(struct iwl4965_priv *priv, int mode)
2380 {
2381         if (mode == IEEE80211_IF_TYPE_IBSS) {
2382                 const struct iwl4965_channel_info *ch_info;
2383
2384                 ch_info = iwl4965_get_channel_info(priv,
2385                         priv->band,
2386                         le16_to_cpu(priv->staging_rxon.channel));
2387
2388                 if (!ch_info || !is_channel_ibss(ch_info)) {
2389                         IWL_ERROR("channel %d not IBSS channel\n",
2390                                   le16_to_cpu(priv->staging_rxon.channel));
2391                         return -EINVAL;
2392                 }
2393         }
2394
2395         priv->iw_mode = mode;
2396
2397         iwl4965_connection_init_rx_config(priv);
2398         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2399
2400         iwl4965_clear_stations_table(priv);
2401
2402         /* dont commit rxon if rf-kill is on*/
2403         if (!iwl4965_is_ready_rf(priv))
2404                 return -EAGAIN;
2405
2406         cancel_delayed_work(&priv->scan_check);
2407         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2408                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2409                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2410                 return -EAGAIN;
2411         }
2412
2413         iwl4965_commit_rxon(priv);
2414
2415         return 0;
2416 }
2417
2418 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl4965_priv *priv,
2419                                       struct ieee80211_tx_control *ctl,
2420                                       struct iwl4965_cmd *cmd,
2421                                       struct sk_buff *skb_frag,
2422                                       int last_frag)
2423 {
2424         struct iwl4965_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2425
2426         switch (keyinfo->alg) {
2427         case ALG_CCMP:
2428                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2429                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2430                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2431                 break;
2432
2433         case ALG_TKIP:
2434 #if 0
2435                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2436
2437                 if (last_frag)
2438                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2439                                8);
2440                 else
2441                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2442 #endif
2443                 break;
2444
2445         case ALG_WEP:
2446                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2447                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2448
2449                 if (keyinfo->keylen == 13)
2450                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2451
2452                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2453
2454                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2455                              "with key %d\n", ctl->key_idx);
2456                 break;
2457
2458         default:
2459                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2460                 break;
2461         }
2462 }
2463
2464 /*
2465  * handle build REPLY_TX command notification.
2466  */
2467 static void iwl4965_build_tx_cmd_basic(struct iwl4965_priv *priv,
2468                                   struct iwl4965_cmd *cmd,
2469                                   struct ieee80211_tx_control *ctrl,
2470                                   struct ieee80211_hdr *hdr,
2471                                   int is_unicast, u8 std_id)
2472 {
2473         __le16 *qc;
2474         u16 fc = le16_to_cpu(hdr->frame_control);
2475         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2476
2477         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2478         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2479                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2480                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2481                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2482                 if (ieee80211_is_probe_response(fc) &&
2483                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2484                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2485         } else {
2486                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2487                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2488         }
2489
2490         if (ieee80211_is_back_request(fc))
2491                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2492
2493
2494         cmd->cmd.tx.sta_id = std_id;
2495         if (ieee80211_get_morefrag(hdr))
2496                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2497
2498         qc = ieee80211_get_qos_ctrl(hdr);
2499         if (qc) {
2500                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2501                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2502         } else
2503                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2504
2505         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2506                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2507                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2508         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2509                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2510                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2511         }
2512
2513         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2514                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2515
2516         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2517         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2518                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2519                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2520                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2521                 else
2522                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2523         } else
2524                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2525
2526         cmd->cmd.tx.driver_txop = 0;
2527         cmd->cmd.tx.tx_flags = tx_flags;
2528         cmd->cmd.tx.next_frame_len = 0;
2529 }
2530
2531 /**
2532  * iwl4965_get_sta_id - Find station's index within station table
2533  *
2534  * If new IBSS station, create new entry in station table
2535  */
2536 static int iwl4965_get_sta_id(struct iwl4965_priv *priv,
2537                                 struct ieee80211_hdr *hdr)
2538 {
2539         int sta_id;
2540         u16 fc = le16_to_cpu(hdr->frame_control);
2541         DECLARE_MAC_BUF(mac);
2542
2543         /* If this frame is broadcast or management, use broadcast station id */
2544         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2545             is_multicast_ether_addr(hdr->addr1))
2546                 return priv->hw_setting.bcast_sta_id;
2547
2548         switch (priv->iw_mode) {
2549
2550         /* If we are a client station in a BSS network, use the special
2551          * AP station entry (that's the only station we communicate with) */
2552         case IEEE80211_IF_TYPE_STA:
2553                 return IWL_AP_ID;
2554
2555         /* If we are an AP, then find the station, or use BCAST */
2556         case IEEE80211_IF_TYPE_AP:
2557                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2558                 if (sta_id != IWL_INVALID_STATION)
2559                         return sta_id;
2560                 return priv->hw_setting.bcast_sta_id;
2561
2562         /* If this frame is going out to an IBSS network, find the station,
2563          * or create a new station table entry */
2564         case IEEE80211_IF_TYPE_IBSS:
2565                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2566                 if (sta_id != IWL_INVALID_STATION)
2567                         return sta_id;
2568
2569                 /* Create new station table entry */
2570                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2571                                                    0, CMD_ASYNC, NULL);
2572
2573                 if (sta_id != IWL_INVALID_STATION)
2574                         return sta_id;
2575
2576                 IWL_DEBUG_DROP("Station %s not in station map. "
2577                                "Defaulting to broadcast...\n",
2578                                print_mac(mac, hdr->addr1));
2579                 iwl4965_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2580                 return priv->hw_setting.bcast_sta_id;
2581
2582         default:
2583                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2584                 return priv->hw_setting.bcast_sta_id;
2585         }
2586 }
2587
2588 /*
2589  * start REPLY_TX command process
2590  */
2591 static int iwl4965_tx_skb(struct iwl4965_priv *priv,
2592                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2593 {
2594         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2595         struct iwl4965_tfd_frame *tfd;
2596         u32 *control_flags;
2597         int txq_id = ctl->queue;
2598         struct iwl4965_tx_queue *txq = NULL;
2599         struct iwl4965_queue *q = NULL;
2600         dma_addr_t phys_addr;
2601         dma_addr_t txcmd_phys;
2602         dma_addr_t scratch_phys;
2603         struct iwl4965_cmd *out_cmd = NULL;
2604         u16 len, idx, len_org;
2605         u8 id, hdr_len, unicast;
2606         u8 sta_id;
2607         u16 seq_number = 0;
2608         u16 fc;
2609         __le16 *qc;
2610         u8 wait_write_ptr = 0;
2611         unsigned long flags;
2612         int rc;
2613
2614         spin_lock_irqsave(&priv->lock, flags);
2615         if (iwl4965_is_rfkill(priv)) {
2616                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2617                 goto drop_unlock;
2618         }
2619
2620         if (!priv->vif) {
2621                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2622                 goto drop_unlock;
2623         }
2624
2625         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2626                 IWL_ERROR("ERROR: No TX rate available.\n");
2627                 goto drop_unlock;
2628         }
2629
2630         unicast = !is_multicast_ether_addr(hdr->addr1);
2631         id = 0;
2632
2633         fc = le16_to_cpu(hdr->frame_control);
2634
2635 #ifdef CONFIG_IWL4965_DEBUG
2636         if (ieee80211_is_auth(fc))
2637                 IWL_DEBUG_TX("Sending AUTH frame\n");
2638         else if (ieee80211_is_assoc_request(fc))
2639                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2640         else if (ieee80211_is_reassoc_request(fc))
2641                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2642 #endif
2643
2644         /* drop all data frame if we are not associated */
2645         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2646            (!iwl4965_is_associated(priv) ||
2647             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2648             !priv->assoc_station_added)) {
2649                 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2650                 goto drop_unlock;
2651         }
2652
2653         spin_unlock_irqrestore(&priv->lock, flags);
2654
2655         hdr_len = ieee80211_get_hdrlen(fc);
2656
2657         /* Find (or create) index into station table for destination station */
2658         sta_id = iwl4965_get_sta_id(priv, hdr);
2659         if (sta_id == IWL_INVALID_STATION) {
2660                 DECLARE_MAC_BUF(mac);
2661
2662                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2663                                print_mac(mac, hdr->addr1));
2664                 goto drop;
2665         }
2666
2667         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2668
2669         qc = ieee80211_get_qos_ctrl(hdr);
2670         if (qc) {
2671                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2672                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2673                                 IEEE80211_SCTL_SEQ;
2674                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2675                         (hdr->seq_ctrl &
2676                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2677                 seq_number += 0x10;
2678 #ifdef CONFIG_IWL4965_HT
2679                 /* aggregation is on for this <sta,tid> */
2680                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2681                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2682                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2683 #endif /* CONFIG_IWL4965_HT */
2684         }
2685
2686         /* Descriptor for chosen Tx queue */
2687         txq = &priv->txq[txq_id];
2688         q = &txq->q;
2689
2690         spin_lock_irqsave(&priv->lock, flags);
2691
2692         /* Set up first empty TFD within this queue's circular TFD buffer */
2693         tfd = &txq->bd[q->write_ptr];
2694         memset(tfd, 0, sizeof(*tfd));
2695         control_flags = (u32 *) tfd;
2696         idx = get_cmd_index(q, q->write_ptr, 0);
2697
2698         /* Set up driver data for this TFD */
2699         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2700         txq->txb[q->write_ptr].skb[0] = skb;
2701         memcpy(&(txq->txb[q->write_ptr].status.control),
2702                ctl, sizeof(struct ieee80211_tx_control));
2703
2704         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2705         out_cmd = &txq->cmd[idx];
2706         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2707         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2708
2709         /*
2710          * Set up the Tx-command (not MAC!) header.
2711          * Store the chosen Tx queue and TFD index within the sequence field;
2712          * after Tx, uCode's Tx response will return this value so driver can
2713          * locate the frame within the tx queue and do post-tx processing.
2714          */
2715         out_cmd->hdr.cmd = REPLY_TX;
2716         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2717                                 INDEX_TO_SEQ(q->write_ptr)));
2718
2719         /* Copy MAC header from skb into command buffer */
2720         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2721
2722         /*
2723          * Use the first empty entry in this queue's command buffer array
2724          * to contain the Tx command and MAC header concatenated together
2725          * (payload data will be in another buffer).
2726          * Size of this varies, due to varying MAC header length.
2727          * If end is not dword aligned, we'll have 2 extra bytes at the end
2728          * of the MAC header (device reads on dword boundaries).
2729          * We'll tell device about this padding later.
2730          */
2731         len = priv->hw_setting.tx_cmd_len +
2732                 sizeof(struct iwl4965_cmd_header) + hdr_len;
2733
2734         len_org = len;
2735         len = (len + 3) & ~3;
2736
2737         if (len_org != len)
2738                 len_org = 1;
2739         else
2740                 len_org = 0;
2741
2742         /* Physical address of this Tx command's header (not MAC header!),
2743          * within command buffer array. */
2744         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl4965_cmd) * idx +
2745                      offsetof(struct iwl4965_cmd, hdr);
2746
2747         /* Add buffer containing Tx command and MAC(!) header to TFD's
2748          * first entry */
2749         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2750
2751         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2752                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2753
2754         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2755          * if any (802.11 null frames have no payload). */
2756         len = skb->len - hdr_len;
2757         if (len) {
2758                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2759                                            len, PCI_DMA_TODEVICE);
2760                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2761         }
2762
2763         /* Tell 4965 about any 2-byte padding after MAC header */
2764         if (len_org)
2765                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2766
2767         /* Total # bytes to be transmitted */
2768         len = (u16)skb->len;
2769         out_cmd->cmd.tx.len = cpu_to_le16(len);
2770
2771         /* TODO need this for burst mode later on */
2772         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2773
2774         /* set is_hcca to 0; it probably will never be implemented */
2775         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2776
2777         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
2778                 offsetof(struct iwl4965_tx_cmd, scratch);
2779         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2780         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2781
2782         if (!ieee80211_get_morefrag(hdr)) {
2783                 txq->need_update = 1;
2784                 if (qc) {
2785                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2786                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2787                 }
2788         } else {
2789                 wait_write_ptr = 1;
2790                 txq->need_update = 0;
2791         }
2792
2793         iwl4965_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2794                            sizeof(out_cmd->cmd.tx));
2795
2796         iwl4965_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2797                            ieee80211_get_hdrlen(fc));
2798
2799         /* Set up entry for this TFD in Tx byte-count array */
2800         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2801
2802         /* Tell device the write index *just past* this latest filled TFD */
2803         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2804         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2805         spin_unlock_irqrestore(&priv->lock, flags);
2806
2807         if (rc)
2808                 return rc;
2809
2810         if ((iwl4965_queue_space(q) < q->high_mark)
2811             && priv->mac80211_registered) {
2812                 if (wait_write_ptr) {
2813                         spin_lock_irqsave(&priv->lock, flags);
2814                         txq->need_update = 1;
2815                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2816                         spin_unlock_irqrestore(&priv->lock, flags);
2817                 }
2818
2819                 ieee80211_stop_queue(priv->hw, ctl->queue);
2820         }
2821
2822         return 0;
2823
2824 drop_unlock:
2825         spin_unlock_irqrestore(&priv->lock, flags);
2826 drop:
2827         return -1;
2828 }
2829
2830 static void iwl4965_set_rate(struct iwl4965_priv *priv)
2831 {
2832         const struct ieee80211_supported_band *hw = NULL;
2833         struct ieee80211_rate *rate;
2834         int i;
2835
2836         hw = iwl4965_get_hw_mode(priv, priv->band);
2837         if (!hw) {
2838                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2839                 return;
2840         }
2841
2842         priv->active_rate = 0;
2843         priv->active_rate_basic = 0;
2844
2845         for (i = 0; i < hw->n_bitrates; i++) {
2846                 rate = &(hw->bitrates[i]);
2847                 if (rate->hw_value < IWL_RATE_COUNT)
2848                         priv->active_rate |= (1 << rate->hw_value);
2849         }
2850
2851         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2852                        priv->active_rate, priv->active_rate_basic);
2853
2854         /*
2855          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2856          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2857          * OFDM
2858          */
2859         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2860                 priv->staging_rxon.cck_basic_rates =
2861                     ((priv->active_rate_basic &
2862                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2863         else
2864                 priv->staging_rxon.cck_basic_rates =
2865                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2866
2867         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2868                 priv->staging_rxon.ofdm_basic_rates =
2869                     ((priv->active_rate_basic &
2870                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2871                       IWL_FIRST_OFDM_RATE) & 0xFF;
2872         else
2873                 priv->staging_rxon.ofdm_basic_rates =
2874                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2875 }
2876
2877 static void iwl4965_radio_kill_sw(struct iwl4965_priv *priv, int disable_radio)
2878 {
2879         unsigned long flags;
2880
2881         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2882                 return;
2883
2884         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2885                           disable_radio ? "OFF" : "ON");
2886
2887         if (disable_radio) {
2888                 iwl4965_scan_cancel(priv);
2889                 /* FIXME: This is a workaround for AP */
2890                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2891                         spin_lock_irqsave(&priv->lock, flags);
2892                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
2893                                     CSR_UCODE_SW_BIT_RFKILL);
2894                         spin_unlock_irqrestore(&priv->lock, flags);
2895                         iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2896                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2897                 }
2898                 return;
2899         }
2900
2901         spin_lock_irqsave(&priv->lock, flags);
2902         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2903
2904         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2905         spin_unlock_irqrestore(&priv->lock, flags);
2906
2907         /* wake up ucode */
2908         msleep(10);
2909
2910         spin_lock_irqsave(&priv->lock, flags);
2911         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
2912         if (!iwl4965_grab_nic_access(priv))
2913                 iwl4965_release_nic_access(priv);
2914         spin_unlock_irqrestore(&priv->lock, flags);
2915
2916         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2917                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2918                                   "disabled by HW switch\n");
2919                 return;
2920         }
2921
2922         queue_work(priv->workqueue, &priv->restart);
2923         return;
2924 }
2925
2926 void iwl4965_set_decrypted_flag(struct iwl4965_priv *priv, struct sk_buff *skb,
2927                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2928 {
2929         u16 fc =
2930             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2931
2932         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2933                 return;
2934
2935         if (!(fc & IEEE80211_FCTL_PROTECTED))
2936                 return;
2937
2938         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2939         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2940         case RX_RES_STATUS_SEC_TYPE_TKIP:
2941                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2942                     RX_RES_STATUS_BAD_ICV_MIC)
2943                         stats->flag |= RX_FLAG_MMIC_ERROR;
2944         case RX_RES_STATUS_SEC_TYPE_WEP:
2945         case RX_RES_STATUS_SEC_TYPE_CCMP:
2946                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2947                     RX_RES_STATUS_DECRYPT_OK) {
2948                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2949                         stats->flag |= RX_FLAG_DECRYPTED;
2950                 }
2951                 break;
2952
2953         default:
2954                 break;
2955         }
2956 }
2957
2958
2959 #define IWL_PACKET_RETRY_TIME HZ
2960
2961 int iwl4965_is_duplicate_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
2962 {
2963         u16 sc = le16_to_cpu(header->seq_ctrl);
2964         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2965         u16 frag = sc & IEEE80211_SCTL_FRAG;
2966         u16 *last_seq, *last_frag;
2967         unsigned long *last_time;
2968
2969         switch (priv->iw_mode) {
2970         case IEEE80211_IF_TYPE_IBSS:{
2971                 struct list_head *p;
2972                 struct iwl4965_ibss_seq *entry = NULL;
2973                 u8 *mac = header->addr2;
2974                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2975
2976                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2977                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2978                         if (!compare_ether_addr(entry->mac, mac))
2979                                 break;
2980                 }
2981                 if (p == &priv->ibss_mac_hash[index]) {
2982                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2983                         if (!entry) {
2984                                 IWL_ERROR("Cannot malloc new mac entry\n");
2985                                 return 0;
2986                         }
2987                         memcpy(entry->mac, mac, ETH_ALEN);
2988                         entry->seq_num = seq;
2989                         entry->frag_num = frag;
2990                         entry->packet_time = jiffies;
2991                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2992                         return 0;
2993                 }
2994                 last_seq = &entry->seq_num;
2995                 last_frag = &entry->frag_num;
2996                 last_time = &entry->packet_time;
2997                 break;
2998         }
2999         case IEEE80211_IF_TYPE_STA:
3000                 last_seq = &priv->last_seq_num;
3001                 last_frag = &priv->last_frag_num;
3002                 last_time = &priv->last_packet_time;
3003                 break;
3004         default:
3005                 return 0;
3006         }
3007         if ((*last_seq == seq) &&
3008             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3009                 if (*last_frag == frag)
3010                         goto drop;
3011                 if (*last_frag + 1 != frag)
3012                         /* out-of-order fragment */
3013                         goto drop;
3014         } else
3015                 *last_seq = seq;
3016
3017         *last_frag = frag;
3018         *last_time = jiffies;
3019         return 0;
3020
3021  drop:
3022         return 1;
3023 }
3024
3025 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3026
3027 #include "iwl-spectrum.h"
3028
3029 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3030 #define BEACON_TIME_MASK_HIGH   0xFF000000
3031 #define TIME_UNIT               1024
3032
3033 /*
3034  * extended beacon time format
3035  * time in usec will be changed into a 32-bit value in 8:24 format
3036  * the high 1 byte is the beacon counts
3037  * the lower 3 bytes is the time in usec within one beacon interval
3038  */
3039
3040 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
3041 {
3042         u32 quot;
3043         u32 rem;
3044         u32 interval = beacon_interval * 1024;
3045
3046         if (!interval || !usec)
3047                 return 0;
3048
3049         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3050         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3051
3052         return (quot << 24) + rem;
3053 }
3054
3055 /* base is usually what we get from ucode with each received frame,
3056  * the same as HW timer counter counting down
3057  */
3058
3059 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3060 {
3061         u32 base_low = base & BEACON_TIME_MASK_LOW;
3062         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3063         u32 interval = beacon_interval * TIME_UNIT;
3064         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3065             (addon & BEACON_TIME_MASK_HIGH);
3066
3067         if (base_low > addon_low)
3068                 res += base_low - addon_low;
3069         else if (base_low < addon_low) {
3070                 res += interval + base_low - addon_low;
3071                 res += (1 << 24);
3072         } else
3073                 res += (1 << 24);
3074
3075         return cpu_to_le32(res);
3076 }
3077
3078 static int iwl4965_get_measurement(struct iwl4965_priv *priv,
3079                                struct ieee80211_measurement_params *params,
3080                                u8 type)
3081 {
3082         struct iwl4965_spectrum_cmd spectrum;
3083         struct iwl4965_rx_packet *res;
3084         struct iwl4965_host_cmd cmd = {
3085                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3086                 .data = (void *)&spectrum,
3087                 .meta.flags = CMD_WANT_SKB,
3088         };
3089         u32 add_time = le64_to_cpu(params->start_time);
3090         int rc;
3091         int spectrum_resp_status;
3092         int duration = le16_to_cpu(params->duration);
3093
3094         if (iwl4965_is_associated(priv))
3095                 add_time =
3096                     iwl4965_usecs_to_beacons(
3097                         le64_to_cpu(params->start_time) - priv->last_tsf,
3098                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3099
3100         memset(&spectrum, 0, sizeof(spectrum));
3101
3102         spectrum.channel_count = cpu_to_le16(1);
3103         spectrum.flags =
3104             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3105         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3106         cmd.len = sizeof(spectrum);
3107         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3108
3109         if (iwl4965_is_associated(priv))
3110                 spectrum.start_time =
3111                     iwl4965_add_beacon_time(priv->last_beacon_time,
3112                                 add_time,
3113                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3114         else
3115                 spectrum.start_time = 0;
3116
3117         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3118         spectrum.channels[0].channel = params->channel;
3119         spectrum.channels[0].type = type;
3120         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3121                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3122                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3123
3124         rc = iwl4965_send_cmd_sync(priv, &cmd);
3125         if (rc)
3126                 return rc;
3127
3128         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
3129         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3130                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3131                 rc = -EIO;
3132         }
3133
3134         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3135         switch (spectrum_resp_status) {
3136         case 0:         /* Command will be handled */
3137                 if (res->u.spectrum.id != 0xff) {
3138                         IWL_DEBUG_INFO
3139                             ("Replaced existing measurement: %d\n",
3140                              res->u.spectrum.id);
3141                         priv->measurement_status &= ~MEASUREMENT_READY;
3142                 }
3143                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3144                 rc = 0;
3145                 break;
3146
3147         case 1:         /* Command will not be handled */
3148                 rc = -EAGAIN;
3149                 break;
3150         }
3151
3152         dev_kfree_skb_any(cmd.meta.u.skb);
3153
3154         return rc;
3155 }
3156 #endif
3157
3158 static void iwl4965_txstatus_to_ieee(struct iwl4965_priv *priv,
3159                                  struct iwl4965_tx_info *tx_sta)
3160 {
3161
3162         tx_sta->status.ack_signal = 0;
3163         tx_sta->status.excessive_retries = 0;
3164         tx_sta->status.queue_length = 0;
3165         tx_sta->status.queue_number = 0;
3166
3167         if (in_interrupt())
3168                 ieee80211_tx_status_irqsafe(priv->hw,
3169                                             tx_sta->skb[0], &(tx_sta->status));
3170         else
3171                 ieee80211_tx_status(priv->hw,
3172                                     tx_sta->skb[0], &(tx_sta->status));
3173
3174         tx_sta->skb[0] = NULL;
3175 }
3176
3177 /**
3178  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3179  *
3180  * When FW advances 'R' index, all entries between old and new 'R' index
3181  * need to be reclaimed. As result, some free space forms.  If there is
3182  * enough free space (> low mark), wake the stack that feeds us.
3183  */
3184 int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index)
3185 {
3186         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3187         struct iwl4965_queue *q = &txq->q;
3188         int nfreed = 0;
3189
3190         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3191                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3192                           "is out of range [0-%d] %d %d.\n", txq_id,
3193                           index, q->n_bd, q->write_ptr, q->read_ptr);
3194                 return 0;
3195         }
3196
3197         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3198                 q->read_ptr != index;
3199                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3200                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3201                         iwl4965_txstatus_to_ieee(priv,
3202                                         &(txq->txb[txq->q.read_ptr]));
3203                         iwl4965_hw_txq_free_tfd(priv, txq);
3204                 } else if (nfreed > 1) {
3205                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3206                                         q->write_ptr, q->read_ptr);
3207                         queue_work(priv->workqueue, &priv->restart);
3208                 }
3209                 nfreed++;
3210         }
3211
3212 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3213                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3214                         priv->mac80211_registered)
3215                 ieee80211_wake_queue(priv->hw, txq_id); */
3216
3217
3218         return nfreed;
3219 }
3220
3221 static int iwl4965_is_tx_success(u32 status)
3222 {
3223         status &= TX_STATUS_MSK;
3224         return (status == TX_STATUS_SUCCESS)
3225             || (status == TX_STATUS_DIRECT_DONE);
3226 }
3227
3228 /******************************************************************************
3229  *
3230  * Generic RX handler implementations
3231  *
3232  ******************************************************************************/
3233 #ifdef CONFIG_IWL4965_HT
3234
3235 static inline int iwl4965_get_ra_sta_id(struct iwl4965_priv *priv,
3236                                     struct ieee80211_hdr *hdr)
3237 {
3238         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3239                 return IWL_AP_ID;
3240         else {
3241                 u8 *da = ieee80211_get_DA(hdr);
3242                 return iwl4965_hw_find_station(priv, da);
3243         }
3244 }
3245
3246 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
3247         struct iwl4965_priv *priv, int txq_id, int idx)
3248 {
3249         if (priv->txq[txq_id].txb[idx].skb[0])
3250                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3251                                 txb[idx].skb[0]->data;
3252         return NULL;
3253 }
3254
3255 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3256 {
3257         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3258                                 tx_resp->frame_count);
3259         return le32_to_cpu(*scd_ssn) & MAX_SN;
3260
3261 }
3262
3263 /**
3264  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3265  */
3266 static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
3267                                       struct iwl4965_ht_agg *agg,
3268                                       struct iwl4965_tx_resp_agg *tx_resp,
3269                                       u16 start_idx)
3270 {
3271         u16 status;
3272         struct agg_tx_status *frame_status = &tx_resp->status;
3273         struct ieee80211_tx_status *tx_status = NULL;
3274         struct ieee80211_hdr *hdr = NULL;
3275         int i, sh;
3276         int txq_id, idx;
3277         u16 seq;
3278
3279         if (agg->wait_for_ba)
3280                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3281
3282         agg->frame_count = tx_resp->frame_count;
3283         agg->start_idx = start_idx;
3284         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3285         agg->bitmap = 0;
3286
3287         /* # frames attempted by Tx command */
3288         if (agg->frame_count == 1) {
3289                 /* Only one frame was attempted; no block-ack will arrive */
3290                 status = le16_to_cpu(frame_status[0].status);
3291                 seq  = le16_to_cpu(frame_status[0].sequence);
3292                 idx = SEQ_TO_INDEX(seq);
3293                 txq_id = SEQ_TO_QUEUE(seq);
3294
3295                 /* FIXME: code repetition */
3296                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3297                                    agg->frame_count, agg->start_idx, idx);
3298
3299                 tx_status = &(priv->txq[txq_id].txb[idx].status);
3300                 tx_status->retry_count = tx_resp->failure_frame;
3301                 tx_status->queue_number = status & 0xff;
3302                 tx_status->queue_length = tx_resp->failure_rts;
3303                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
3304                 tx_status->flags = iwl4965_is_tx_success(status)?
3305                         IEEE80211_TX_STATUS_ACK : 0;
3306                 iwl4965_hwrate_to_tx_control(priv,
3307                                              le32_to_cpu(tx_resp->rate_n_flags),
3308                                              &tx_status->control);
3309                 /* FIXME: code repetition end */
3310
3311                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3312                                     status & 0xff, tx_resp->failure_frame);
3313                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3314                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3315
3316                 agg->wait_for_ba = 0;
3317         } else {
3318                 /* Two or more frames were attempted; expect block-ack */
3319                 u64 bitmap = 0;
3320                 int start = agg->start_idx;
3321
3322                 /* Construct bit-map of pending frames within Tx window */
3323                 for (i = 0; i < agg->frame_count; i++) {
3324                         u16 sc;
3325                         status = le16_to_cpu(frame_status[i].status);
3326                         seq  = le16_to_cpu(frame_status[i].sequence);
3327                         idx = SEQ_TO_INDEX(seq);
3328                         txq_id = SEQ_TO_QUEUE(seq);
3329
3330                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3331                                       AGG_TX_STATE_ABORT_MSK))
3332                                 continue;
3333
3334                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3335                                            agg->frame_count, txq_id, idx);
3336
3337                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3338
3339                         sc = le16_to_cpu(hdr->seq_ctrl);
3340                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3341                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3342                                           " idx=%d, seq_idx=%d, seq=%d\n",
3343                                           idx, SEQ_TO_SN(sc),
3344                                           hdr->seq_ctrl);
3345                                 return -1;
3346                         }
3347
3348                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3349                                            i, idx, SEQ_TO_SN(sc));
3350
3351                         sh = idx - start;
3352                         if (sh > 64) {
3353                                 sh = (start - idx) + 0xff;
3354                                 bitmap = bitmap << sh;
3355                                 sh = 0;
3356                                 start = idx;
3357                         } else if (sh < -64)
3358                                 sh  = 0xff - (start - idx);
3359                         else if (sh < 0) {
3360                                 sh = start - idx;
3361                                 start = idx;
3362                                 bitmap = bitmap << sh;
3363                                 sh = 0;
3364                         }
3365                         bitmap |= (1 << sh);
3366                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3367                                            start, (u32)(bitmap & 0xFFFFFFFF));
3368                 }
3369
3370                 agg->bitmap = bitmap;
3371                 agg->start_idx = start;
3372                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3373                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3374                                    agg->frame_count, agg->start_idx,
3375                                    agg->bitmap);
3376
3377                 if (bitmap)
3378                         agg->wait_for_ba = 1;
3379         }
3380         return 0;
3381 }
3382 #endif
3383
3384 /**
3385  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3386  */
3387 static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
3388                             struct iwl4965_rx_mem_buffer *rxb)
3389 {
3390         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3391         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3392         int txq_id = SEQ_TO_QUEUE(sequence);
3393         int index = SEQ_TO_INDEX(sequence);
3394         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3395         struct ieee80211_tx_status *tx_status;
3396         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3397         u32  status = le32_to_cpu(tx_resp->status);
3398 #ifdef CONFIG_IWL4965_HT
3399         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3400         struct ieee80211_hdr *hdr;
3401         __le16 *qc;
3402 #endif
3403
3404         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3405                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3406                           "is out of range [0-%d] %d %d\n", txq_id,
3407                           index, txq->q.n_bd, txq->q.write_ptr,
3408                           txq->q.read_ptr);
3409                 return;
3410         }
3411
3412 #ifdef CONFIG_IWL4965_HT
3413         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3414         qc = ieee80211_get_qos_ctrl(hdr);
3415
3416         if (qc)
3417                 tid = le16_to_cpu(*qc) & 0xf;
3418
3419         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3420         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3421                 IWL_ERROR("Station not known\n");
3422                 return;
3423         }
3424
3425         if (txq->sched_retry) {
3426                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3427                 struct iwl4965_ht_agg *agg = NULL;
3428
3429                 if (!qc)
3430                         return;
3431
3432                 agg = &priv->stations[sta_id].tid[tid].agg;
3433
3434                 iwl4965_tx_status_reply_tx(priv, agg,
3435                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3436
3437                 if ((tx_resp->frame_count == 1) &&
3438                     !iwl4965_is_tx_success(status)) {
3439                         /* TODO: send BAR */
3440                 }
3441
3442                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3443                         int freed;
3444                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3445                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3446                                            "%d index %d\n", scd_ssn , index);
3447                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3448                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3449
3450                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3451                             txq_id >= 0 && priv->mac80211_registered &&
3452                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3453                                 ieee80211_wake_queue(priv->hw, txq_id);
3454
3455                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3456                 }
3457         } else {
3458 #endif /* CONFIG_IWL4965_HT */
3459         tx_status = &(txq->txb[txq->q.read_ptr].status);
3460
3461         tx_status->retry_count = tx_resp->failure_frame;
3462         tx_status->queue_number = status;
3463         tx_status->queue_length = tx_resp->bt_kill_count;
3464         tx_status->queue_length |= tx_resp->failure_rts;
3465         tx_status->flags =
3466             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3467         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3468                                      &tx_status->control);
3469
3470         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3471                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3472                      status, le32_to_cpu(tx_resp->rate_n_flags),
3473                      tx_resp->failure_frame);
3474
3475         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3476         if (index != -1) {
3477                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3478 #ifdef CONFIG_IWL4965_HT
3479                 if (tid != MAX_TID_COUNT)
3480                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3481                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3482                         (txq_id >= 0) &&
3483                         priv->mac80211_registered)
3484                         ieee80211_wake_queue(priv->hw, txq_id);
3485                 if (tid != MAX_TID_COUNT)
3486                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3487 #endif
3488         }
3489 #ifdef CONFIG_IWL4965_HT
3490         }
3491 #endif /* CONFIG_IWL4965_HT */
3492
3493         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3494                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3495 }
3496
3497
3498 static void iwl4965_rx_reply_alive(struct iwl4965_priv *priv,
3499                                struct iwl4965_rx_mem_buffer *rxb)
3500 {
3501         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3502         struct iwl4965_alive_resp *palive;
3503         struct delayed_work *pwork;
3504
3505         palive = &pkt->u.alive_frame;
3506
3507         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3508                        "0x%01X 0x%01X\n",
3509                        palive->is_valid, palive->ver_type,
3510                        palive->ver_subtype);
3511
3512         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3513                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3514                 memcpy(&priv->card_alive_init,
3515                        &pkt->u.alive_frame,
3516                        sizeof(struct iwl4965_init_alive_resp));
3517                 pwork = &priv->init_alive_start;
3518         } else {
3519                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3520                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3521                        sizeof(struct iwl4965_alive_resp));
3522                 pwork = &priv->alive_start;
3523         }
3524
3525         /* We delay the ALIVE response by 5ms to
3526          * give the HW RF Kill time to activate... */
3527         if (palive->is_valid == UCODE_VALID_OK)
3528                 queue_delayed_work(priv->workqueue, pwork,
3529                                    msecs_to_jiffies(5));
3530         else
3531                 IWL_WARNING("uCode did not respond OK.\n");
3532 }
3533
3534 static void iwl4965_rx_reply_add_sta(struct iwl4965_priv *priv,
3535                                  struct iwl4965_rx_mem_buffer *rxb)
3536 {
3537         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3538
3539         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3540         return;
3541 }
3542
3543 static void iwl4965_rx_reply_error(struct iwl4965_priv *priv,
3544                                struct iwl4965_rx_mem_buffer *rxb)
3545 {
3546         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3547
3548         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3549                 "seq 0x%04X ser 0x%08X\n",
3550                 le32_to_cpu(pkt->u.err_resp.error_type),
3551                 get_cmd_string(pkt->u.err_resp.cmd_id),
3552                 pkt->u.err_resp.cmd_id,
3553                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3554                 le32_to_cpu(pkt->u.err_resp.error_info));
3555 }
3556
3557 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3558
3559 static void iwl4965_rx_csa(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3560 {
3561         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3562         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3563         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3564         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3565                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3566         rxon->channel = csa->channel;
3567         priv->staging_rxon.channel = csa->channel;
3568 }
3569
3570 static void iwl4965_rx_spectrum_measure_notif(struct iwl4965_priv *priv,
3571                                           struct iwl4965_rx_mem_buffer *rxb)
3572 {
3573 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3574         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3575         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3576
3577         if (!report->state) {
3578                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3579                           "Spectrum Measure Notification: Start\n");
3580                 return;
3581         }
3582
3583         memcpy(&priv->measure_report, report, sizeof(*report));
3584         priv->measurement_status |= MEASUREMENT_READY;
3585 #endif
3586 }
3587
3588 static void iwl4965_rx_pm_sleep_notif(struct iwl4965_priv *priv,
3589                                   struct iwl4965_rx_mem_buffer *rxb)
3590 {
3591 #ifdef CONFIG_IWL4965_DEBUG
3592         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3593         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3594         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3595                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3596 #endif
3597 }
3598
3599 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl4965_priv *priv,
3600                                              struct iwl4965_rx_mem_buffer *rxb)
3601 {
3602         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3603         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3604                         "notification for %s:\n",
3605                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3606         iwl4965_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3607 }
3608
3609 static void iwl4965_bg_beacon_update(struct work_struct *work)
3610 {
3611         struct iwl4965_priv *priv =
3612                 container_of(work, struct iwl4965_priv, beacon_update);
3613         struct sk_buff *beacon;
3614
3615         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3616         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3617
3618         if (!beacon) {
3619                 IWL_ERROR("update beacon failed\n");
3620                 return;
3621         }
3622
3623         mutex_lock(&priv->mutex);
3624         /* new beacon skb is allocated every time; dispose previous.*/
3625         if (priv->ibss_beacon)
3626                 dev_kfree_skb(priv->ibss_beacon);
3627
3628         priv->ibss_beacon = beacon;
3629         mutex_unlock(&priv->mutex);
3630
3631         iwl4965_send_beacon_cmd(priv);
3632 }
3633
3634 static void iwl4965_rx_beacon_notif(struct iwl4965_priv *priv,
3635                                 struct iwl4965_rx_mem_buffer *rxb)
3636 {
3637 #ifdef CONFIG_IWL4965_DEBUG
3638         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3639         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3640         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3641
3642         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3643                 "tsf %d %d rate %d\n",
3644                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3645                 beacon->beacon_notify_hdr.failure_frame,
3646                 le32_to_cpu(beacon->ibss_mgr_status),
3647                 le32_to_cpu(beacon->high_tsf),
3648                 le32_to_cpu(beacon->low_tsf), rate);
3649 #endif
3650
3651         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3652             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3653                 queue_work(priv->workqueue, &priv->beacon_update);
3654 }
3655
3656 /* Service response to REPLY_SCAN_CMD (0x80) */
3657 static void iwl4965_rx_reply_scan(struct iwl4965_priv *priv,
3658                               struct iwl4965_rx_mem_buffer *rxb)
3659 {
3660 #ifdef CONFIG_IWL4965_DEBUG
3661         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3662         struct iwl4965_scanreq_notification *notif =
3663             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3664
3665         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3666 #endif
3667 }
3668
3669 /* Service SCAN_START_NOTIFICATION (0x82) */
3670 static void iwl4965_rx_scan_start_notif(struct iwl4965_priv *priv,
3671                                     struct iwl4965_rx_mem_buffer *rxb)
3672 {
3673         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3674         struct iwl4965_scanstart_notification *notif =
3675             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3676         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3677         IWL_DEBUG_SCAN("Scan start: "
3678                        "%d [802.11%s] "
3679                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3680                        notif->channel,
3681                        notif->band ? "bg" : "a",
3682                        notif->tsf_high,
3683                        notif->tsf_low, notif->status, notif->beacon_timer);
3684 }
3685
3686 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3687 static void iwl4965_rx_scan_results_notif(struct iwl4965_priv *priv,
3688                                       struct iwl4965_rx_mem_buffer *rxb)
3689 {
3690         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3691         struct iwl4965_scanresults_notification *notif =
3692             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3693
3694         IWL_DEBUG_SCAN("Scan ch.res: "
3695                        "%d [802.11%s] "
3696                        "(TSF: 0x%08X:%08X) - %d "
3697                        "elapsed=%lu usec (%dms since last)\n",
3698                        notif->channel,
3699                        notif->band ? "bg" : "a",
3700                        le32_to_cpu(notif->tsf_high),
3701                        le32_to_cpu(notif->tsf_low),
3702                        le32_to_cpu(notif->statistics[0]),
3703                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3704                        jiffies_to_msecs(elapsed_jiffies
3705                                         (priv->last_scan_jiffies, jiffies)));
3706
3707         priv->last_scan_jiffies = jiffies;
3708         priv->next_scan_jiffies = 0;
3709 }
3710
3711 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3712 static void iwl4965_rx_scan_complete_notif(struct iwl4965_priv *priv,
3713                                        struct iwl4965_rx_mem_buffer *rxb)
3714 {
3715         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3716         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3717
3718         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3719                        scan_notif->scanned_channels,
3720                        scan_notif->tsf_low,
3721                        scan_notif->tsf_high, scan_notif->status);
3722
3723         /* The HW is no longer scanning */
3724         clear_bit(STATUS_SCAN_HW, &priv->status);
3725
3726         /* The scan completion notification came in, so kill that timer... */
3727         cancel_delayed_work(&priv->scan_check);
3728
3729         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3730                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3731                        jiffies_to_msecs(elapsed_jiffies
3732                                         (priv->scan_pass_start, jiffies)));
3733
3734         /* Remove this scanned band from the list
3735          * of pending bands to scan */
3736         priv->scan_bands--;
3737
3738         /* If a request to abort was given, or the scan did not succeed
3739          * then we reset the scan state machine and terminate,
3740          * re-queuing another scan if one has been requested */
3741         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3742                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3743                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3744         } else {
3745                 /* If there are more bands on this scan pass reschedule */
3746                 if (priv->scan_bands > 0)
3747                         goto reschedule;
3748         }
3749
3750         priv->last_scan_jiffies = jiffies;
3751         priv->next_scan_jiffies = 0;
3752         IWL_DEBUG_INFO("Setting scan to off\n");
3753
3754         clear_bit(STATUS_SCANNING, &priv->status);
3755
3756         IWL_DEBUG_INFO("Scan took %dms\n",
3757                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3758
3759         queue_work(priv->workqueue, &priv->scan_completed);
3760
3761         return;
3762
3763 reschedule:
3764         priv->scan_pass_start = jiffies;
3765         queue_work(priv->workqueue, &priv->request_scan);
3766 }
3767
3768 /* Handle notification from uCode that card's power state is changing
3769  * due to software, hardware, or critical temperature RFKILL */
3770 static void iwl4965_rx_card_state_notif(struct iwl4965_priv *priv,
3771                                     struct iwl4965_rx_mem_buffer *rxb)
3772 {
3773         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3774         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3775         unsigned long status = priv->status;
3776
3777         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3778                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3779                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3780
3781         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3782                      RF_CARD_DISABLED)) {
3783
3784                 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3785                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3786
3787                 if (!iwl4965_grab_nic_access(priv)) {
3788                         iwl4965_write_direct32(
3789                                 priv, HBUS_TARG_MBX_C,
3790                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3791
3792                         iwl4965_release_nic_access(priv);
3793                 }
3794
3795                 if (!(flags & RXON_CARD_DISABLED)) {
3796                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3797                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3798                         if (!iwl4965_grab_nic_access(priv)) {
3799                                 iwl4965_write_direct32(
3800                                         priv, HBUS_TARG_MBX_C,
3801                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3802
3803                                 iwl4965_release_nic_access(priv);
3804                         }
3805                 }
3806
3807                 if (flags & RF_CARD_DISABLED) {
3808                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3809                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3810                         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3811                         if (!iwl4965_grab_nic_access(priv))
3812                                 iwl4965_release_nic_access(priv);
3813                 }
3814         }
3815
3816         if (flags & HW_CARD_DISABLED)
3817                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3818         else
3819                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3820
3821
3822         if (flags & SW_CARD_DISABLED)
3823                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3824         else
3825                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3826
3827         if (!(flags & RXON_CARD_DISABLED))
3828                 iwl4965_scan_cancel(priv);
3829
3830         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3831              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3832             (test_bit(STATUS_RF_KILL_SW, &status) !=
3833              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3834                 queue_work(priv->workqueue, &priv->rf_kill);
3835         else
3836                 wake_up_interruptible(&priv->wait_command_queue);
3837 }
3838
3839 /**
3840  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3841  *
3842  * Setup the RX handlers for each of the reply types sent from the uCode
3843  * to the host.
3844  *
3845  * This function chains into the hardware specific files for them to setup
3846  * any hardware specific handlers as well.
3847  */
3848 static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
3849 {
3850         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3851         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3852         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3853         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3854         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3855             iwl4965_rx_spectrum_measure_notif;
3856         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3857         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3858             iwl4965_rx_pm_debug_statistics_notif;
3859         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3860
3861         /*
3862          * The same handler is used for both the REPLY to a discrete
3863          * statistics request from the host as well as for the periodic
3864          * statistics notifications (after received beacons) from the uCode.
3865          */
3866         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3867         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3868
3869         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3870         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3871         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3872             iwl4965_rx_scan_results_notif;
3873         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3874             iwl4965_rx_scan_complete_notif;
3875         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3876         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3877
3878         /* Set up hardware specific Rx handlers */
3879         iwl4965_hw_rx_handler_setup(priv);
3880 }
3881
3882 /**
3883  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3884  * @rxb: Rx buffer to reclaim
3885  *
3886  * If an Rx buffer has an async callback associated with it the callback
3887  * will be executed.  The attached skb (if present) will only be freed
3888  * if the callback returns 1
3889  */
3890 static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
3891                                 struct iwl4965_rx_mem_buffer *rxb)
3892 {
3893         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3894         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3895         int txq_id = SEQ_TO_QUEUE(sequence);
3896         int index = SEQ_TO_INDEX(sequence);
3897         int huge = sequence & SEQ_HUGE_FRAME;
3898         int cmd_index;
3899         struct iwl4965_cmd *cmd;
3900
3901         /* If a Tx command is being handled and it isn't in the actual
3902          * command queue then there a command routing bug has been introduced
3903          * in the queue management code. */
3904         if (txq_id != IWL_CMD_QUEUE_NUM)
3905                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3906                           txq_id, pkt->hdr.cmd);
3907         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3908
3909         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3910         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3911
3912         /* Input error checking is done when commands are added to queue. */
3913         if (cmd->meta.flags & CMD_WANT_SKB) {
3914                 cmd->meta.source->u.skb = rxb->skb;
3915                 rxb->skb = NULL;
3916         } else if (cmd->meta.u.callback &&
3917                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3918                 rxb->skb = NULL;
3919
3920         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3921
3922         if (!(cmd->meta.flags & CMD_ASYNC)) {
3923                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3924                 wake_up_interruptible(&priv->wait_command_queue);
3925         }
3926 }
3927
3928 /************************** RX-FUNCTIONS ****************************/
3929 /*
3930  * Rx theory of operation
3931  *
3932  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3933  * each of which point to Receive Buffers to be filled by 4965.  These get
3934  * used not only for Rx frames, but for any command response or notification
3935  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3936  * of indexes into the circular buffer.
3937  *
3938  * Rx Queue Indexes
3939  * The host/firmware share two index registers for managing the Rx buffers.
3940  *
3941  * The READ index maps to the first position that the firmware may be writing
3942  * to -- the driver can read up to (but not including) this position and get
3943  * good data.
3944  * The READ index is managed by the firmware once the card is enabled.
3945  *
3946  * The WRITE index maps to the last position the driver has read from -- the
3947  * position preceding WRITE is the last slot the firmware can place a packet.
3948  *
3949  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3950  * WRITE = READ.
3951  *
3952  * During initialization, the host sets up the READ queue position to the first
3953  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3954  *
3955  * When the firmware places a packet in a buffer, it will advance the READ index
3956  * and fire the RX interrupt.  The driver can then query the READ index and
3957  * process as many packets as possible, moving the WRITE index forward as it
3958  * resets the Rx queue buffers with new memory.
3959  *
3960  * The management in the driver is as follows:
3961  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3962  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3963  *   to replenish the iwl->rxq->rx_free.
3964  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3965  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3966  *   'processed' and 'read' driver indexes as well)
3967  * + A received packet is processed and handed to the kernel network stack,
3968  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3969  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3970  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3971  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3972  *   were enough free buffers and RX_STALLED is set it is cleared.
3973  *
3974  *
3975  * Driver sequence:
3976  *
3977  * iwl4965_rx_queue_alloc()   Allocates rx_free
3978  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3979  *                            iwl4965_rx_queue_restock
3980  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3981  *                            queue, updates firmware pointers, and updates
3982  *                            the WRITE index.  If insufficient rx_free buffers
3983  *                            are available, schedules iwl4965_rx_replenish
3984  *
3985  * -- enable interrupts --
3986  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3987  *                            READ INDEX, detaching the SKB from the pool.
3988  *                            Moves the packet buffer from queue to rx_used.
3989  *                            Calls iwl4965_rx_queue_restock to refill any empty
3990  *                            slots.
3991  * ...
3992  *
3993  */
3994
3995 /**
3996  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3997  */
3998 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3999 {
4000         int s = q->read - q->write;
4001         if (s <= 0)
4002                 s += RX_QUEUE_SIZE;
4003         /* keep some buffer to not confuse full and empty queue */
4004         s -= 2;
4005         if (s < 0)
4006                 s = 0;
4007         return s;
4008 }
4009
4010 /**
4011  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4012  */
4013 int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_rx_queue *q)
4014 {
4015         u32 reg = 0;
4016         int rc = 0;
4017         unsigned long flags;
4018
4019         spin_lock_irqsave(&q->lock, flags);
4020
4021         if (q->need_update == 0)
4022                 goto exit_unlock;
4023
4024         /* If power-saving is in use, make sure device is awake */
4025         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4026                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4027
4028                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4029                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4030                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4031                         goto exit_unlock;
4032                 }
4033
4034                 rc = iwl4965_grab_nic_access(priv);
4035                 if (rc)
4036                         goto exit_unlock;
4037
4038                 /* Device expects a multiple of 8 */
4039                 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4040                                      q->write & ~0x7);
4041                 iwl4965_release_nic_access(priv);
4042
4043         /* Else device is assumed to be awake */
4044         } else
4045                 /* Device expects a multiple of 8 */
4046                 iwl4965_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4047
4048
4049         q->need_update = 0;
4050
4051  exit_unlock:
4052         spin_unlock_irqrestore(&q->lock, flags);
4053         return rc;
4054 }
4055
4056 /**
4057  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
4058  */
4059 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
4060                                           dma_addr_t dma_addr)
4061 {
4062         return cpu_to_le32((u32)(dma_addr >> 8));
4063 }
4064
4065
4066 /**
4067  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
4068  *
4069  * If there are slots in the RX queue that need to be restocked,
4070  * and we have free pre-allocated buffers, fill the ranks as much
4071  * as we can, pulling from rx_free.
4072  *
4073  * This moves the 'write' index forward to catch up with 'processed', and
4074  * also updates the memory address in the firmware to reference the new
4075  * target buffer.
4076  */
4077 static int iwl4965_rx_queue_restock(struct iwl4965_priv *priv)
4078 {
4079         struct iwl4965_rx_queue *rxq = &priv->rxq;
4080         struct list_head *element;
4081         struct iwl4965_rx_mem_buffer *rxb;
4082         unsigned long flags;
4083         int write, rc;
4084
4085         spin_lock_irqsave(&rxq->lock, flags);
4086         write = rxq->write & ~0x7;
4087         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4088                 /* Get next free Rx buffer, remove from free list */
4089                 element = rxq->rx_free.next;
4090                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4091                 list_del(element);
4092
4093                 /* Point to Rx buffer via next RBD in circular buffer */
4094                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4095                 rxq->queue[rxq->write] = rxb;
4096                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4097                 rxq->free_count--;
4098         }
4099         spin_unlock_irqrestore(&rxq->lock, flags);
4100         /* If the pre-allocated buffer pool is dropping low, schedule to
4101          * refill it */
4102         if (rxq->free_count <= RX_LOW_WATERMARK)
4103                 queue_work(priv->workqueue, &priv->rx_replenish);
4104
4105
4106         /* If we've added more space for the firmware to place data, tell it.
4107          * Increment device's write pointer in multiples of 8. */
4108         if ((write != (rxq->write & ~0x7))
4109             || (abs(rxq->write - rxq->read) > 7)) {
4110                 spin_lock_irqsave(&rxq->lock, flags);
4111                 rxq->need_update = 1;
4112                 spin_unlock_irqrestore(&rxq->lock, flags);
4113                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
4114                 if (rc)
4115                         return rc;
4116         }
4117
4118         return 0;
4119 }
4120
4121 /**
4122  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
4123  *
4124  * When moving to rx_free an SKB is allocated for the slot.
4125  *
4126  * Also restock the Rx queue via iwl4965_rx_queue_restock.
4127  * This is called as a scheduled work item (except for during initialization)
4128  */
4129 static void iwl4965_rx_allocate(struct iwl4965_priv *priv)
4130 {
4131         struct iwl4965_rx_queue *rxq = &priv->rxq;
4132         struct list_head *element;
4133         struct iwl4965_rx_mem_buffer *rxb;
4134         unsigned long flags;
4135         spin_lock_irqsave(&rxq->lock, flags);
4136         while (!list_empty(&rxq->rx_used)) {
4137                 element = rxq->rx_used.next;
4138                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4139
4140                 /* Alloc a new receive buffer */
4141                 rxb->skb =
4142                     alloc_skb(priv->hw_setting.rx_buf_size,
4143                                 __GFP_NOWARN | GFP_ATOMIC);
4144                 if (!rxb->skb) {
4145                         if (net_ratelimit())
4146                                 printk(KERN_CRIT DRV_NAME
4147                                        ": Can not allocate SKB buffers\n");
4148                         /* We don't reschedule replenish work here -- we will
4149                          * call the restock method and if it still needs
4150                          * more buffers it will schedule replenish */
4151                         break;
4152                 }
4153                 priv->alloc_rxb_skb++;
4154                 list_del(element);
4155
4156                 /* Get physical address of RB/SKB */
4157                 rxb->dma_addr =
4158                     pci_map_single(priv->pci_dev, rxb->skb->data,
4159                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
4160                 list_add_tail(&rxb->list, &rxq->rx_free);
4161                 rxq->free_count++;
4162         }
4163         spin_unlock_irqrestore(&rxq->lock, flags);
4164 }
4165
4166 /*
4167  * this should be called while priv->lock is locked
4168 */
4169 static void __iwl4965_rx_replenish(void *data)
4170 {
4171         struct iwl4965_priv *priv = data;
4172
4173         iwl4965_rx_allocate(priv);
4174         iwl4965_rx_queue_restock(priv);
4175 }
4176
4177
4178 void iwl4965_rx_replenish(void *data)
4179 {
4180         struct iwl4965_priv *priv = data;
4181         unsigned long flags;
4182
4183         iwl4965_rx_allocate(priv);
4184
4185         spin_lock_irqsave(&priv->lock, flags);
4186         iwl4965_rx_queue_restock(priv);
4187         spin_unlock_irqrestore(&priv->lock, flags);
4188 }
4189
4190 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4191  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4192  * This free routine walks the list of POOL entries and if SKB is set to
4193  * non NULL it is unmapped and freed
4194  */
4195 static void iwl4965_rx_queue_free(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4196 {
4197         int i;
4198         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4199                 if (rxq->pool[i].skb != NULL) {
4200                         pci_unmap_single(priv->pci_dev,
4201                                          rxq->pool[i].dma_addr,
4202                                          priv->hw_setting.rx_buf_size,
4203                                          PCI_DMA_FROMDEVICE);
4204                         dev_kfree_skb(rxq->pool[i].skb);
4205                 }
4206         }
4207
4208         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4209                             rxq->dma_addr);
4210         rxq->bd = NULL;
4211 }
4212
4213 int iwl4965_rx_queue_alloc(struct iwl4965_priv *priv)
4214 {
4215         struct iwl4965_rx_queue *rxq = &priv->rxq;
4216         struct pci_dev *dev = priv->pci_dev;
4217         int i;
4218
4219         spin_lock_init(&rxq->lock);
4220         INIT_LIST_HEAD(&rxq->rx_free);
4221         INIT_LIST_HEAD(&rxq->rx_used);
4222
4223         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4224         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4225         if (!rxq->bd)
4226                 return -ENOMEM;
4227
4228         /* Fill the rx_used queue with _all_ of the Rx buffers */
4229         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4230                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4231
4232         /* Set us so that we have processed and used all buffers, but have
4233          * not restocked the Rx queue with fresh buffers */
4234         rxq->read = rxq->write = 0;
4235         rxq->free_count = 0;
4236         rxq->need_update = 0;
4237         return 0;
4238 }
4239
4240 void iwl4965_rx_queue_reset(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4241 {
4242         unsigned long flags;
4243         int i;
4244         spin_lock_irqsave(&rxq->lock, flags);
4245         INIT_LIST_HEAD(&rxq->rx_free);
4246         INIT_LIST_HEAD(&rxq->rx_used);
4247         /* Fill the rx_used queue with _all_ of the Rx buffers */
4248         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4249                 /* In the reset function, these buffers may have been allocated
4250                  * to an SKB, so we need to unmap and free potential storage */
4251                 if (rxq->pool[i].skb != NULL) {
4252                         pci_unmap_single(priv->pci_dev,
4253                                          rxq->pool[i].dma_addr,
4254                                          priv->hw_setting.rx_buf_size,
4255                                          PCI_DMA_FROMDEVICE);
4256                         priv->alloc_rxb_skb--;
4257                         dev_kfree_skb(rxq->pool[i].skb);
4258                         rxq->pool[i].skb = NULL;
4259                 }
4260                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4261         }
4262
4263         /* Set us so that we have processed and used all buffers, but have
4264          * not restocked the Rx queue with fresh buffers */
4265         rxq->read = rxq->write = 0;
4266         rxq->free_count = 0;
4267         spin_unlock_irqrestore(&rxq->lock, flags);
4268 }
4269
4270 /* Convert linear signal-to-noise ratio into dB */
4271 static u8 ratio2dB[100] = {
4272 /*       0   1   2   3   4   5   6   7   8   9 */
4273          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4274         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4275         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4276         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4277         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4278         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4279         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4280         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4281         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4282         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4283 };
4284
4285 /* Calculates a relative dB value from a ratio of linear
4286  *   (i.e. not dB) signal levels.
4287  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4288 int iwl4965_calc_db_from_ratio(int sig_ratio)
4289 {
4290         /* 1000:1 or higher just report as 60 dB */
4291         if (sig_ratio >= 1000)
4292                 return 60;
4293
4294         /* 100:1 or higher, divide by 10 and use table,
4295          *   add 20 dB to make up for divide by 10 */
4296         if (sig_ratio >= 100)
4297                 return (20 + (int)ratio2dB[sig_ratio/10]);
4298
4299         /* We shouldn't see this */
4300         if (sig_ratio < 1)
4301                 return 0;
4302
4303         /* Use table for ratios 1:1 - 99:1 */
4304         return (int)ratio2dB[sig_ratio];
4305 }
4306
4307 #define PERFECT_RSSI (-20) /* dBm */
4308 #define WORST_RSSI (-95)   /* dBm */
4309 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4310
4311 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4312  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4313  *   about formulas used below. */
4314 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4315 {
4316         int sig_qual;
4317         int degradation = PERFECT_RSSI - rssi_dbm;
4318
4319         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4320          * as indicator; formula is (signal dbm - noise dbm).
4321          * SNR at or above 40 is a great signal (100%).
4322          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4323          * Weakest usable signal is usually 10 - 15 dB SNR. */
4324         if (noise_dbm) {
4325                 if (rssi_dbm - noise_dbm >= 40)
4326                         return 100;
4327                 else if (rssi_dbm < noise_dbm)
4328                         return 0;
4329                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4330
4331         /* Else use just the signal level.
4332          * This formula is a least squares fit of data points collected and
4333          *   compared with a reference system that had a percentage (%) display
4334          *   for signal quality. */
4335         } else
4336                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4337                             (15 * RSSI_RANGE + 62 * degradation)) /
4338                            (RSSI_RANGE * RSSI_RANGE);
4339
4340         if (sig_qual > 100)
4341                 sig_qual = 100;
4342         else if (sig_qual < 1)
4343                 sig_qual = 0;
4344
4345         return sig_qual;
4346 }
4347
4348 /**
4349  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4350  *
4351  * Uses the priv->rx_handlers callback function array to invoke
4352  * the appropriate handlers, including command responses,
4353  * frame-received notifications, and other notifications.
4354  */
4355 static void iwl4965_rx_handle(struct iwl4965_priv *priv)
4356 {
4357         struct iwl4965_rx_mem_buffer *rxb;
4358         struct iwl4965_rx_packet *pkt;
4359         struct iwl4965_rx_queue *rxq = &priv->rxq;
4360         u32 r, i;
4361         int reclaim;
4362         unsigned long flags;
4363         u8 fill_rx = 0;
4364         u32 count = 8;
4365
4366         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4367          * buffer that the driver may process (last buffer filled by ucode). */
4368         r = iwl4965_hw_get_rx_read(priv);
4369         i = rxq->read;
4370
4371         /* Rx interrupt, but nothing sent from uCode */
4372         if (i == r)
4373                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4374
4375         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4376                 fill_rx = 1;
4377
4378         while (i != r) {
4379                 rxb = rxq->queue[i];
4380
4381                 /* If an RXB doesn't have a Rx queue slot associated with it,
4382                  * then a bug has been introduced in the queue refilling
4383                  * routines -- catch it here */
4384                 BUG_ON(rxb == NULL);
4385
4386                 rxq->queue[i] = NULL;
4387
4388                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4389                                             priv->hw_setting.rx_buf_size,
4390                                             PCI_DMA_FROMDEVICE);
4391                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4392
4393                 /* Reclaim a command buffer only if this packet is a response
4394                  *   to a (driver-originated) command.
4395                  * If the packet (e.g. Rx frame) originated from uCode,
4396                  *   there is no command buffer to reclaim.
4397                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4398                  *   but apparently a few don't get set; catch them here. */
4399                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4400                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4401                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4402                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4403                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4404                         (pkt->hdr.cmd != REPLY_TX);
4405
4406                 /* Based on type of command response or notification,
4407                  *   handle those that need handling via function in
4408                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4409                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4410                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4411                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4412                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4413                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4414                 } else {
4415                         /* No handling needed */
4416                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4417                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4418                                 r, i, get_cmd_string(pkt->hdr.cmd),
4419                                 pkt->hdr.cmd);
4420                 }
4421
4422                 if (reclaim) {
4423                         /* Invoke any callbacks, transfer the skb to caller, and
4424                          * fire off the (possibly) blocking iwl4965_send_cmd()
4425                          * as we reclaim the driver command queue */
4426                         if (rxb && rxb->skb)
4427                                 iwl4965_tx_cmd_complete(priv, rxb);
4428                         else
4429                                 IWL_WARNING("Claim null rxb?\n");
4430                 }
4431
4432                 /* For now we just don't re-use anything.  We can tweak this
4433                  * later to try and re-use notification packets and SKBs that
4434                  * fail to Rx correctly */
4435                 if (rxb->skb != NULL) {
4436                         priv->alloc_rxb_skb--;
4437                         dev_kfree_skb_any(rxb->skb);
4438                         rxb->skb = NULL;
4439                 }
4440
4441                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4442                                  priv->hw_setting.rx_buf_size,
4443                                  PCI_DMA_FROMDEVICE);
4444                 spin_lock_irqsave(&rxq->lock, flags);
4445                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4446                 spin_unlock_irqrestore(&rxq->lock, flags);
4447                 i = (i + 1) & RX_QUEUE_MASK;
4448                 /* If there are a lot of unused frames,
4449                  * restock the Rx queue so ucode wont assert. */
4450                 if (fill_rx) {
4451                         count++;
4452                         if (count >= 8) {
4453                                 priv->rxq.read = i;
4454                                 __iwl4965_rx_replenish(priv);
4455                                 count = 0;
4456                         }
4457                 }
4458         }
4459
4460         /* Backtrack one entry */
4461         priv->rxq.read = i;
4462         iwl4965_rx_queue_restock(priv);
4463 }
4464
4465 /**
4466  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4467  */
4468 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
4469                                   struct iwl4965_tx_queue *txq)
4470 {
4471         u32 reg = 0;
4472         int rc = 0;
4473         int txq_id = txq->q.id;
4474
4475         if (txq->need_update == 0)
4476                 return rc;
4477
4478         /* if we're trying to save power */
4479         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4480                 /* wake up nic if it's powered down ...
4481                  * uCode will wake up, and interrupt us again, so next
4482                  * time we'll skip this part. */
4483                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4484
4485                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4486                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4487                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4488                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4489                         return rc;
4490                 }
4491
4492                 /* restore this queue's parameters in nic hardware. */
4493                 rc = iwl4965_grab_nic_access(priv);
4494                 if (rc)
4495                         return rc;
4496                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
4497                                      txq->q.write_ptr | (txq_id << 8));
4498                 iwl4965_release_nic_access(priv);
4499
4500         /* else not in power-save mode, uCode will never sleep when we're
4501          * trying to tx (during RFKILL, we're not trying to tx). */
4502         } else
4503                 iwl4965_write32(priv, HBUS_TARG_WRPTR,
4504                             txq->q.write_ptr | (txq_id << 8));
4505
4506         txq->need_update = 0;
4507
4508         return rc;
4509 }
4510
4511 #ifdef CONFIG_IWL4965_DEBUG
4512 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4513 {
4514         DECLARE_MAC_BUF(mac);
4515
4516         IWL_DEBUG_RADIO("RX CONFIG:\n");
4517         iwl4965_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4518         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4519         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4520         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4521                         le32_to_cpu(rxon->filter_flags));
4522         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4523         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4524                         rxon->ofdm_basic_rates);
4525         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4526         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4527                         print_mac(mac, rxon->node_addr));
4528         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4529                         print_mac(mac, rxon->bssid_addr));
4530         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4531 }
4532 #endif
4533
4534 static void iwl4965_enable_interrupts(struct iwl4965_priv *priv)
4535 {
4536         IWL_DEBUG_ISR("Enabling interrupts\n");
4537         set_bit(STATUS_INT_ENABLED, &priv->status);
4538         iwl4965_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4539 }
4540
4541 static inline void iwl4965_disable_interrupts(struct iwl4965_priv *priv)
4542 {
4543         clear_bit(STATUS_INT_ENABLED, &priv->status);
4544
4545         /* disable interrupts from uCode/NIC to host */
4546         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4547
4548         /* acknowledge/clear/reset any interrupts still pending
4549          * from uCode or flow handler (Rx/Tx DMA) */
4550         iwl4965_write32(priv, CSR_INT, 0xffffffff);
4551         iwl4965_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4552         IWL_DEBUG_ISR("Disabled interrupts\n");
4553 }
4554
4555 static const char *desc_lookup(int i)
4556 {
4557         switch (i) {
4558         case 1:
4559                 return "FAIL";
4560         case 2:
4561                 return "BAD_PARAM";
4562         case 3:
4563                 return "BAD_CHECKSUM";
4564         case 4:
4565                 return "NMI_INTERRUPT";
4566         case 5:
4567                 return "SYSASSERT";
4568         case 6:
4569                 return "FATAL_ERROR";
4570         }
4571
4572         return "UNKNOWN";
4573 }
4574
4575 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4576 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4577
4578 static void iwl4965_dump_nic_error_log(struct iwl4965_priv *priv)
4579 {
4580         u32 data2, line;
4581         u32 desc, time, count, base, data1;
4582         u32 blink1, blink2, ilink1, ilink2;
4583         int rc;
4584
4585         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4586
4587         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4588                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4589                 return;
4590         }
4591
4592         rc = iwl4965_grab_nic_access(priv);
4593         if (rc) {
4594                 IWL_WARNING("Can not read from adapter at this time.\n");
4595                 return;
4596         }
4597
4598         count = iwl4965_read_targ_mem(priv, base);
4599
4600         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4601                 IWL_ERROR("Start IWL Error Log Dump:\n");
4602                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4603         }
4604
4605         desc = iwl4965_read_targ_mem(priv, base + 1 * sizeof(u32));
4606         blink1 = iwl4965_read_targ_mem(priv, base + 3 * sizeof(u32));
4607         blink2 = iwl4965_read_targ_mem(priv, base + 4 * sizeof(u32));
4608         ilink1 = iwl4965_read_targ_mem(priv, base + 5 * sizeof(u32));
4609         ilink2 = iwl4965_read_targ_mem(priv, base + 6 * sizeof(u32));
4610         data1 = iwl4965_read_targ_mem(priv, base + 7 * sizeof(u32));
4611         data2 = iwl4965_read_targ_mem(priv, base + 8 * sizeof(u32));
4612         line = iwl4965_read_targ_mem(priv, base + 9 * sizeof(u32));
4613         time = iwl4965_read_targ_mem(priv, base + 11 * sizeof(u32));
4614
4615         IWL_ERROR("Desc               Time       "
4616                   "data1      data2      line\n");
4617         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4618                   desc_lookup(desc), desc, time, data1, data2, line);
4619         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4620         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4621                   ilink1, ilink2);
4622
4623         iwl4965_release_nic_access(priv);
4624 }
4625
4626 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4627
4628 /**
4629  * iwl4965_print_event_log - Dump error event log to syslog
4630  *
4631  * NOTE: Must be called with iwl4965_grab_nic_access() already obtained!
4632  */
4633 static void iwl4965_print_event_log(struct iwl4965_priv *priv, u32 start_idx,
4634                                 u32 num_events, u32 mode)
4635 {
4636         u32 i;
4637         u32 base;       /* SRAM byte address of event log header */
4638         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4639         u32 ptr;        /* SRAM byte address of log data */
4640         u32 ev, time, data; /* event log data */
4641
4642         if (num_events == 0)
4643                 return;
4644
4645         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4646
4647         if (mode == 0)
4648                 event_size = 2 * sizeof(u32);
4649         else
4650                 event_size = 3 * sizeof(u32);
4651
4652         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4653
4654         /* "time" is actually "data" for mode 0 (no timestamp).
4655          * place event id # at far right for easier visual parsing. */
4656         for (i = 0; i < num_events; i++) {
4657                 ev = iwl4965_read_targ_mem(priv, ptr);
4658                 ptr += sizeof(u32);
4659                 time = iwl4965_read_targ_mem(priv, ptr);
4660                 ptr += sizeof(u32);
4661                 if (mode == 0)
4662                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4663                 else {
4664                         data = iwl4965_read_targ_mem(priv, ptr);
4665                         ptr += sizeof(u32);
4666                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4667                 }
4668         }
4669 }
4670
4671 static void iwl4965_dump_nic_event_log(struct iwl4965_priv *priv)
4672 {
4673         int rc;
4674         u32 base;       /* SRAM byte address of event log header */
4675         u32 capacity;   /* event log capacity in # entries */
4676         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4677         u32 num_wraps;  /* # times uCode wrapped to top of log */
4678         u32 next_entry; /* index of next entry to be written by uCode */
4679         u32 size;       /* # entries that we'll print */
4680
4681         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4682         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4683                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4684                 return;
4685         }
4686
4687         rc = iwl4965_grab_nic_access(priv);
4688         if (rc) {
4689                 IWL_WARNING("Can not read from adapter at this time.\n");
4690                 return;
4691         }
4692
4693         /* event log header */
4694         capacity = iwl4965_read_targ_mem(priv, base);
4695         mode = iwl4965_read_targ_mem(priv, base + (1 * sizeof(u32)));
4696         num_wraps = iwl4965_read_targ_mem(priv, base + (2 * sizeof(u32)));
4697         next_entry = iwl4965_read_targ_mem(priv, base + (3 * sizeof(u32)));
4698
4699         size = num_wraps ? capacity : next_entry;
4700
4701         /* bail out if nothing in log */
4702         if (size == 0) {
4703                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4704                 iwl4965_release_nic_access(priv);
4705                 return;
4706         }
4707
4708         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4709                   size, num_wraps);
4710
4711         /* if uCode has wrapped back to top of log, start at the oldest entry,
4712          * i.e the next one that uCode would fill. */
4713         if (num_wraps)
4714                 iwl4965_print_event_log(priv, next_entry,
4715                                     capacity - next_entry, mode);
4716
4717         /* (then/else) start at top of log */
4718         iwl4965_print_event_log(priv, 0, next_entry, mode);
4719
4720         iwl4965_release_nic_access(priv);
4721 }
4722
4723 /**
4724  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4725  */
4726 static void iwl4965_irq_handle_error(struct iwl4965_priv *priv)
4727 {
4728         /* Set the FW error flag -- cleared on iwl4965_down */
4729         set_bit(STATUS_FW_ERROR, &priv->status);
4730
4731         /* Cancel currently queued command. */
4732         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4733
4734 #ifdef CONFIG_IWL4965_DEBUG
4735         if (iwl4965_debug_level & IWL_DL_FW_ERRORS) {
4736                 iwl4965_dump_nic_error_log(priv);
4737                 iwl4965_dump_nic_event_log(priv);
4738                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4739         }
4740 #endif
4741
4742         wake_up_interruptible(&priv->wait_command_queue);
4743
4744         /* Keep the restart process from trying to send host
4745          * commands by clearing the INIT status bit */
4746         clear_bit(STATUS_READY, &priv->status);
4747
4748         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4749                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4750                           "Restarting adapter due to uCode error.\n");
4751
4752                 if (iwl4965_is_associated(priv)) {
4753                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4754                                sizeof(priv->recovery_rxon));
4755                         priv->error_recovering = 1;
4756                 }
4757                 queue_work(priv->workqueue, &priv->restart);
4758         }
4759 }
4760
4761 static void iwl4965_error_recovery(struct iwl4965_priv *priv)
4762 {
4763         unsigned long flags;
4764
4765         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4766                sizeof(priv->staging_rxon));
4767         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4768         iwl4965_commit_rxon(priv);
4769
4770         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4771
4772         spin_lock_irqsave(&priv->lock, flags);
4773         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4774         priv->error_recovering = 0;
4775         spin_unlock_irqrestore(&priv->lock, flags);
4776 }
4777
4778 static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
4779 {
4780         u32 inta, handled = 0;
4781         u32 inta_fh;
4782         unsigned long flags;
4783 #ifdef CONFIG_IWL4965_DEBUG
4784         u32 inta_mask;
4785 #endif
4786
4787         spin_lock_irqsave(&priv->lock, flags);
4788
4789         /* Ack/clear/reset pending uCode interrupts.
4790          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4791          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4792         inta = iwl4965_read32(priv, CSR_INT);
4793         iwl4965_write32(priv, CSR_INT, inta);
4794
4795         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4796          * Any new interrupts that happen after this, either while we're
4797          * in this tasklet, or later, will show up in next ISR/tasklet. */
4798         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4799         iwl4965_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4800
4801 #ifdef CONFIG_IWL4965_DEBUG
4802         if (iwl4965_debug_level & IWL_DL_ISR) {
4803                 /* just for debug */
4804                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
4805                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4806                               inta, inta_mask, inta_fh);
4807         }
4808 #endif
4809
4810         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4811          * atomic, make sure that inta covers all the interrupts that
4812          * we've discovered, even if FH interrupt came in just after
4813          * reading CSR_INT. */
4814         if (inta_fh & CSR49_FH_INT_RX_MASK)
4815                 inta |= CSR_INT_BIT_FH_RX;
4816         if (inta_fh & CSR49_FH_INT_TX_MASK)
4817                 inta |= CSR_INT_BIT_FH_TX;
4818
4819         /* Now service all interrupt bits discovered above. */
4820         if (inta & CSR_INT_BIT_HW_ERR) {
4821                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4822
4823                 /* Tell the device to stop sending interrupts */
4824                 iwl4965_disable_interrupts(priv);
4825
4826                 iwl4965_irq_handle_error(priv);
4827
4828                 handled |= CSR_INT_BIT_HW_ERR;
4829
4830                 spin_unlock_irqrestore(&priv->lock, flags);
4831
4832                 return;
4833         }
4834
4835 #ifdef CONFIG_IWL4965_DEBUG
4836         if (iwl4965_debug_level & (IWL_DL_ISR)) {
4837                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4838                 if (inta & CSR_INT_BIT_SCD)
4839                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4840                                       "the frame/frames.\n");
4841
4842                 /* Alive notification via Rx interrupt will do the real work */
4843                 if (inta & CSR_INT_BIT_ALIVE)
4844                         IWL_DEBUG_ISR("Alive interrupt\n");
4845         }
4846 #endif
4847         /* Safely ignore these bits for debug checks below */
4848         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4849
4850         /* HW RF KILL switch toggled */
4851         if (inta & CSR_INT_BIT_RF_KILL) {
4852                 int hw_rf_kill = 0;
4853                 if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
4854                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4855                         hw_rf_kill = 1;
4856
4857                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4858                                 "RF_KILL bit toggled to %s.\n",
4859                                 hw_rf_kill ? "disable radio":"enable radio");
4860
4861                 /* Queue restart only if RF_KILL switch was set to "kill"
4862                  *   when we loaded driver, and is now set to "enable".
4863                  * After we're Alive, RF_KILL gets handled by
4864                  *   iwl4965_rx_card_state_notif() */
4865                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4866                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4867                         queue_work(priv->workqueue, &priv->restart);
4868                 }
4869
4870                 handled |= CSR_INT_BIT_RF_KILL;
4871         }
4872
4873         /* Chip got too hot and stopped itself */
4874         if (inta & CSR_INT_BIT_CT_KILL) {
4875                 IWL_ERROR("Microcode CT kill error detected.\n");
4876                 handled |= CSR_INT_BIT_CT_KILL;
4877         }
4878
4879         /* Error detected by uCode */
4880         if (inta & CSR_INT_BIT_SW_ERR) {
4881                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4882                           inta);
4883                 iwl4965_irq_handle_error(priv);
4884                 handled |= CSR_INT_BIT_SW_ERR;
4885         }
4886
4887         /* uCode wakes up after power-down sleep */
4888         if (inta & CSR_INT_BIT_WAKEUP) {
4889                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4890                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4891                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4892                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4893                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4894                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4895                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4896                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4897
4898                 handled |= CSR_INT_BIT_WAKEUP;
4899         }
4900
4901         /* All uCode command responses, including Tx command responses,
4902          * Rx "responses" (frame-received notification), and other
4903          * notifications from uCode come through here*/
4904         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4905                 iwl4965_rx_handle(priv);
4906                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4907         }
4908
4909         if (inta & CSR_INT_BIT_FH_TX) {
4910                 IWL_DEBUG_ISR("Tx interrupt\n");
4911                 handled |= CSR_INT_BIT_FH_TX;
4912         }
4913
4914         if (inta & ~handled)
4915                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4916
4917         if (inta & ~CSR_INI_SET_MASK) {
4918                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4919                          inta & ~CSR_INI_SET_MASK);
4920                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4921         }
4922
4923         /* Re-enable all interrupts */
4924         iwl4965_enable_interrupts(priv);
4925
4926 #ifdef CONFIG_IWL4965_DEBUG
4927         if (iwl4965_debug_level & (IWL_DL_ISR)) {
4928                 inta = iwl4965_read32(priv, CSR_INT);
4929                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
4930                 inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4931                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4932                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4933         }
4934 #endif
4935         spin_unlock_irqrestore(&priv->lock, flags);
4936 }
4937
4938 static irqreturn_t iwl4965_isr(int irq, void *data)
4939 {
4940         struct iwl4965_priv *priv = data;
4941         u32 inta, inta_mask;
4942         u32 inta_fh;
4943         if (!priv)
4944                 return IRQ_NONE;
4945
4946         spin_lock(&priv->lock);
4947
4948         /* Disable (but don't clear!) interrupts here to avoid
4949          *    back-to-back ISRs and sporadic interrupts from our NIC.
4950          * If we have something to service, the tasklet will re-enable ints.
4951          * If we *don't* have something, we'll re-enable before leaving here. */
4952         inta_mask = iwl4965_read32(priv, CSR_INT_MASK);  /* just for debug */
4953         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4954
4955         /* Discover which interrupts are active/pending */
4956         inta = iwl4965_read32(priv, CSR_INT);
4957         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4958
4959         /* Ignore interrupt if there's nothing in NIC to service.
4960          * This may be due to IRQ shared with another device,
4961          * or due to sporadic interrupts thrown from our NIC. */
4962         if (!inta && !inta_fh) {
4963                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4964                 goto none;
4965         }
4966
4967         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4968                 /* Hardware disappeared. It might have already raised
4969                  * an interrupt */
4970                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4971                 goto unplugged;
4972         }
4973
4974         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4975                       inta, inta_mask, inta_fh);
4976
4977         inta &= ~CSR_INT_BIT_SCD;
4978
4979         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4980         if (likely(inta || inta_fh))
4981                 tasklet_schedule(&priv->irq_tasklet);
4982
4983  unplugged:
4984         spin_unlock(&priv->lock);
4985         return IRQ_HANDLED;
4986
4987  none:
4988         /* re-enable interrupts here since we don't have anything to service. */
4989         iwl4965_enable_interrupts(priv);
4990         spin_unlock(&priv->lock);
4991         return IRQ_NONE;
4992 }
4993
4994 /************************** EEPROM BANDS ****************************
4995  *
4996  * The iwl4965_eeprom_band definitions below provide the mapping from the
4997  * EEPROM contents to the specific channel number supported for each
4998  * band.
4999  *
5000  * For example, iwl4965_priv->eeprom.band_3_channels[4] from the band_3
5001  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5002  * The specific geography and calibration information for that channel
5003  * is contained in the eeprom map itself.
5004  *
5005  * During init, we copy the eeprom information and channel map
5006  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5007  *
5008  * channel_map_24/52 provides the index in the channel_info array for a
5009  * given channel.  We have to have two separate maps as there is channel
5010  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5011  * band_2
5012  *
5013  * A value of 0xff stored in the channel_map indicates that the channel
5014  * is not supported by the hardware at all.
5015  *
5016  * A value of 0xfe in the channel_map indicates that the channel is not
5017  * valid for Tx with the current hardware.  This means that
5018  * while the system can tune and receive on a given channel, it may not
5019  * be able to associate or transmit any frames on that
5020  * channel.  There is no corresponding channel information for that
5021  * entry.
5022  *
5023  *********************************************************************/
5024
5025 /* 2.4 GHz */
5026 static const u8 iwl4965_eeprom_band_1[14] = {
5027         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5028 };
5029
5030 /* 5.2 GHz bands */
5031 static const u8 iwl4965_eeprom_band_2[] = {     /* 4915-5080MHz */
5032         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5033 };
5034
5035 static const u8 iwl4965_eeprom_band_3[] = {     /* 5170-5320MHz */
5036         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5037 };
5038
5039 static const u8 iwl4965_eeprom_band_4[] = {     /* 5500-5700MHz */
5040         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5041 };
5042
5043 static const u8 iwl4965_eeprom_band_5[] = {     /* 5725-5825MHz */
5044         145, 149, 153, 157, 161, 165
5045 };
5046
5047 static u8 iwl4965_eeprom_band_6[] = {       /* 2.4 FAT channel */
5048         1, 2, 3, 4, 5, 6, 7
5049 };
5050
5051 static u8 iwl4965_eeprom_band_7[] = {       /* 5.2 FAT channel */
5052         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5053 };
5054
5055 static void iwl4965_init_band_reference(const struct iwl4965_priv *priv,
5056                                     int band,
5057                                     int *eeprom_ch_count,
5058                                     const struct iwl4965_eeprom_channel
5059                                     **eeprom_ch_info,
5060                                     const u8 **eeprom_ch_index)
5061 {
5062         switch (band) {
5063         case 1:         /* 2.4GHz band */
5064                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_1);
5065                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5066                 *eeprom_ch_index = iwl4965_eeprom_band_1;
5067                 break;
5068         case 2:         /* 4.9GHz band */
5069                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_2);
5070                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5071                 *eeprom_ch_index = iwl4965_eeprom_band_2;
5072                 break;
5073         case 3:         /* 5.2GHz band */
5074                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_3);
5075                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5076                 *eeprom_ch_index = iwl4965_eeprom_band_3;
5077                 break;
5078         case 4:         /* 5.5GHz band */
5079                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_4);
5080                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5081                 *eeprom_ch_index = iwl4965_eeprom_band_4;
5082                 break;
5083         case 5:         /* 5.7GHz band */
5084                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_5);
5085                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5086                 *eeprom_ch_index = iwl4965_eeprom_band_5;
5087                 break;
5088         case 6:         /* 2.4GHz FAT channels */
5089                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_6);
5090                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5091                 *eeprom_ch_index = iwl4965_eeprom_band_6;
5092                 break;
5093         case 7:         /* 5 GHz FAT channels */
5094                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_7);
5095                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5096                 *eeprom_ch_index = iwl4965_eeprom_band_7;
5097                 break;
5098         default:
5099                 BUG();
5100                 return;
5101         }
5102 }
5103
5104 /**
5105  * iwl4965_get_channel_info - Find driver's private channel info
5106  *
5107  * Based on band and channel number.
5108  */
5109 const struct iwl4965_channel_info *iwl4965_get_channel_info(const struct iwl4965_priv *priv,
5110                                                     enum ieee80211_band band, u16 channel)
5111 {
5112         int i;
5113
5114         switch (band) {
5115         case IEEE80211_BAND_5GHZ:
5116                 for (i = 14; i < priv->channel_count; i++) {
5117                         if (priv->channel_info[i].channel == channel)
5118                                 return &priv->channel_info[i];
5119                 }
5120                 break;
5121         case IEEE80211_BAND_2GHZ:
5122                 if (channel >= 1 && channel <= 14)
5123                         return &priv->channel_info[channel - 1];
5124                 break;
5125         default:
5126                 BUG();
5127         }
5128
5129         return NULL;
5130 }
5131
5132 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5133                             ? # x " " : "")
5134
5135 /**
5136  * iwl4965_init_channel_map - Set up driver's info for all possible channels
5137  */
5138 static int iwl4965_init_channel_map(struct iwl4965_priv *priv)
5139 {
5140         int eeprom_ch_count = 0;
5141         const u8 *eeprom_ch_index = NULL;
5142         const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
5143         int band, ch;
5144         struct iwl4965_channel_info *ch_info;
5145
5146         if (priv->channel_count) {
5147                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5148                 return 0;
5149         }
5150
5151         if (priv->eeprom.version < 0x2f) {
5152                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5153                             priv->eeprom.version);
5154                 return -EINVAL;
5155         }
5156
5157         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5158
5159         priv->channel_count =
5160             ARRAY_SIZE(iwl4965_eeprom_band_1) +
5161             ARRAY_SIZE(iwl4965_eeprom_band_2) +
5162             ARRAY_SIZE(iwl4965_eeprom_band_3) +
5163             ARRAY_SIZE(iwl4965_eeprom_band_4) +
5164             ARRAY_SIZE(iwl4965_eeprom_band_5);
5165
5166         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5167
5168         priv->channel_info = kzalloc(sizeof(struct iwl4965_channel_info) *
5169                                      priv->channel_count, GFP_KERNEL);
5170         if (!priv->channel_info) {
5171                 IWL_ERROR("Could not allocate channel_info\n");
5172                 priv->channel_count = 0;
5173                 return -ENOMEM;
5174         }
5175
5176         ch_info = priv->channel_info;
5177
5178         /* Loop through the 5 EEPROM bands adding them in order to the
5179          * channel map we maintain (that contains additional information than
5180          * what just in the EEPROM) */
5181         for (band = 1; band <= 5; band++) {
5182
5183                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5184                                         &eeprom_ch_info, &eeprom_ch_index);
5185
5186                 /* Loop through each band adding each of the channels */
5187                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5188                         ch_info->channel = eeprom_ch_index[ch];
5189                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
5190                             IEEE80211_BAND_5GHZ;
5191
5192                         /* permanently store EEPROM's channel regulatory flags
5193                          *   and max power in channel info database. */
5194                         ch_info->eeprom = eeprom_ch_info[ch];
5195
5196                         /* Copy the run-time flags so they are there even on
5197                          * invalid channels */
5198                         ch_info->flags = eeprom_ch_info[ch].flags;
5199
5200                         if (!(is_channel_valid(ch_info))) {
5201                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5202                                                "No traffic\n",
5203                                                ch_info->channel,
5204                                                ch_info->flags,
5205                                                is_channel_a_band(ch_info) ?
5206                                                "5.2" : "2.4");
5207                                 ch_info++;
5208                                 continue;
5209                         }
5210
5211                         /* Initialize regulatory-based run-time data */
5212                         ch_info->max_power_avg = ch_info->curr_txpow =
5213                             eeprom_ch_info[ch].max_power_avg;
5214                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5215                         ch_info->min_power = 0;
5216
5217                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s%s(0x%02x"
5218                                        " %ddBm): Ad-Hoc %ssupported\n",
5219                                        ch_info->channel,
5220                                        is_channel_a_band(ch_info) ?
5221                                        "5.2" : "2.4",
5222                                        CHECK_AND_PRINT(VALID),
5223                                        CHECK_AND_PRINT(IBSS),
5224                                        CHECK_AND_PRINT(ACTIVE),
5225                                        CHECK_AND_PRINT(RADAR),
5226                                        CHECK_AND_PRINT(WIDE),
5227                                        CHECK_AND_PRINT(NARROW),
5228                                        CHECK_AND_PRINT(DFS),
5229                                        eeprom_ch_info[ch].flags,
5230                                        eeprom_ch_info[ch].max_power_avg,
5231                                        ((eeprom_ch_info[ch].
5232                                          flags & EEPROM_CHANNEL_IBSS)
5233                                         && !(eeprom_ch_info[ch].
5234                                              flags & EEPROM_CHANNEL_RADAR))
5235                                        ? "" : "not ");
5236
5237                         /* Set the user_txpower_limit to the highest power
5238                          * supported by any channel */
5239                         if (eeprom_ch_info[ch].max_power_avg >
5240                             priv->user_txpower_limit)
5241                                 priv->user_txpower_limit =
5242                                     eeprom_ch_info[ch].max_power_avg;
5243
5244                         ch_info++;
5245                 }
5246         }
5247
5248         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
5249         for (band = 6; band <= 7; band++) {
5250                 enum ieee80211_band ieeeband;
5251                 u8 fat_extension_chan;
5252
5253                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5254                                         &eeprom_ch_info, &eeprom_ch_index);
5255
5256                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
5257                 ieeeband = (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
5258
5259                 /* Loop through each band adding each of the channels */
5260                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5261
5262                         if ((band == 6) &&
5263                             ((eeprom_ch_index[ch] == 5) ||
5264                             (eeprom_ch_index[ch] == 6) ||
5265                             (eeprom_ch_index[ch] == 7)))
5266                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5267                         else
5268                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5269
5270                         /* Set up driver's info for lower half */
5271                         iwl4965_set_fat_chan_info(priv, ieeeband,
5272                                                   eeprom_ch_index[ch],
5273                                                   &(eeprom_ch_info[ch]),
5274                                                   fat_extension_chan);
5275
5276                         /* Set up driver's info for upper half */
5277                         iwl4965_set_fat_chan_info(priv, ieeeband,
5278                                                   (eeprom_ch_index[ch] + 4),
5279                                                   &(eeprom_ch_info[ch]),
5280                                                   HT_IE_EXT_CHANNEL_BELOW);
5281                 }
5282         }
5283
5284         return 0;
5285 }
5286
5287 /*
5288  * iwl4965_free_channel_map - undo allocations in iwl4965_init_channel_map
5289  */
5290 static void iwl4965_free_channel_map(struct iwl4965_priv *priv)
5291 {
5292         kfree(priv->channel_info);
5293         priv->channel_count = 0;
5294 }
5295
5296 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5297  * sending probe req.  This should be set long enough to hear probe responses
5298  * from more than one AP.  */
5299 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5300 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5301
5302 /* For faster active scanning, scan will move to the next channel if fewer than
5303  * PLCP_QUIET_THRESH packets are heard on this channel within
5304  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5305  * time if it's a quiet channel (nothing responded to our probe, and there's
5306  * no other traffic).
5307  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5308 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5309 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5310
5311 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5312  * Must be set longer than active dwell time.
5313  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5314 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5315 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5316 #define IWL_PASSIVE_DWELL_BASE      (100)
5317 #define IWL_CHANNEL_TUNE_TIME       5
5318
5319 static inline u16 iwl4965_get_active_dwell_time(struct iwl4965_priv *priv,
5320                                                 enum ieee80211_band band)
5321 {
5322         if (band == IEEE80211_BAND_5GHZ)
5323                 return IWL_ACTIVE_DWELL_TIME_52;
5324         else
5325                 return IWL_ACTIVE_DWELL_TIME_24;
5326 }
5327
5328 static u16 iwl4965_get_passive_dwell_time(struct iwl4965_priv *priv,
5329                                           enum ieee80211_band band)
5330 {
5331         u16 active = iwl4965_get_active_dwell_time(priv, band);
5332         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
5333             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5334             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5335
5336         if (iwl4965_is_associated(priv)) {
5337                 /* If we're associated, we clamp the maximum passive
5338                  * dwell time to be 98% of the beacon interval (minus
5339                  * 2 * channel tune time) */
5340                 passive = priv->beacon_int;
5341                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5342                         passive = IWL_PASSIVE_DWELL_BASE;
5343                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5344         }
5345
5346         if (passive <= active)
5347                 passive = active + 1;
5348
5349         return passive;
5350 }
5351
5352 static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv,
5353                                          enum ieee80211_band band,
5354                                      u8 is_active, u8 direct_mask,
5355                                      struct iwl4965_scan_channel *scan_ch)
5356 {
5357         const struct ieee80211_channel *channels = NULL;
5358         const struct ieee80211_supported_band *sband;
5359         const struct iwl4965_channel_info *ch_info;
5360         u16 passive_dwell = 0;
5361         u16 active_dwell = 0;
5362         int added, i;
5363
5364         sband = iwl4965_get_hw_mode(priv, band);
5365         if (!sband)
5366                 return 0;
5367
5368         channels = sband->channels;
5369
5370         active_dwell = iwl4965_get_active_dwell_time(priv, band);
5371         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
5372
5373         for (i = 0, added = 0; i < sband->n_channels; i++) {
5374                 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
5375                     le16_to_cpu(priv->active_rxon.channel)) {
5376                         if (iwl4965_is_associated(priv)) {
5377                                 IWL_DEBUG_SCAN
5378                                     ("Skipping current channel %d\n",
5379                                      le16_to_cpu(priv->active_rxon.channel));
5380                                 continue;
5381                         }
5382                 } else if (priv->only_active_channel)
5383                         continue;
5384
5385                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
5386
5387                 ch_info = iwl4965_get_channel_info(priv, band,
5388                                          scan_ch->channel);
5389                 if (!is_channel_valid(ch_info)) {
5390                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5391                                        scan_ch->channel);
5392                         continue;
5393                 }
5394
5395                 if (!is_active || is_channel_passive(ch_info) ||
5396                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
5397                         scan_ch->type = 0;      /* passive */
5398                 else
5399                         scan_ch->type = 1;      /* active */
5400
5401                 if (scan_ch->type & 1)
5402                         scan_ch->type |= (direct_mask << 1);
5403
5404                 if (is_channel_narrow(ch_info))
5405                         scan_ch->type |= (1 << 7);
5406
5407                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5408                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5409
5410                 /* Set txpower levels to defaults */
5411                 scan_ch->tpc.dsp_atten = 110;
5412                 /* scan_pwr_info->tpc.dsp_atten; */
5413
5414                 /*scan_pwr_info->tpc.tx_gain; */
5415                 if (band == IEEE80211_BAND_5GHZ)
5416                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5417                 else {
5418                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5419                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5420                          * power level:
5421                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5422                          */
5423                 }
5424
5425                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5426                                scan_ch->channel,
5427                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5428                                (scan_ch->type & 1) ?
5429                                active_dwell : passive_dwell);
5430
5431                 scan_ch++;
5432                 added++;
5433         }
5434
5435         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5436         return added;
5437 }
5438
5439 static void iwl4965_init_hw_rates(struct iwl4965_priv *priv,
5440                               struct ieee80211_rate *rates)
5441 {
5442         int i;
5443
5444         for (i = 0; i < IWL_RATE_COUNT; i++) {
5445                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
5446                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5447                 rates[i].hw_value_short = i;
5448                 rates[i].flags = 0;
5449                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5450                         /*
5451                          * If CCK != 1M then set short preamble rate flag.
5452                          */
5453                         rates[i].flags |=
5454                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
5455                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
5456                 }
5457         }
5458 }
5459
5460 /**
5461  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
5462  */
5463 static int iwl4965_init_geos(struct iwl4965_priv *priv)
5464 {
5465         struct iwl4965_channel_info *ch;
5466         struct ieee80211_supported_band *sband;
5467         struct ieee80211_channel *channels;
5468         struct ieee80211_channel *geo_ch;
5469         struct ieee80211_rate *rates;
5470         int i = 0;
5471
5472         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5473             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5474                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5475                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5476                 return 0;
5477         }
5478
5479         channels = kzalloc(sizeof(struct ieee80211_channel) *
5480                            priv->channel_count, GFP_KERNEL);
5481         if (!channels)
5482                 return -ENOMEM;
5483
5484         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5485                         GFP_KERNEL);
5486         if (!rates) {
5487                 kfree(channels);
5488                 return -ENOMEM;
5489         }
5490
5491         /* 5.2GHz channels start after the 2.4GHz channels */
5492         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5493         sband->channels = &channels[ARRAY_SIZE(iwl4965_eeprom_band_1)];
5494         /* just OFDM */
5495         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5496         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5497
5498         iwl4965_init_ht_hw_capab(&sband->ht_info, IEEE80211_BAND_5GHZ);
5499
5500         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5501         sband->channels = channels;
5502         /* OFDM & CCK */
5503         sband->bitrates = rates;
5504         sband->n_bitrates = IWL_RATE_COUNT;
5505
5506         iwl4965_init_ht_hw_capab(&sband->ht_info, IEEE80211_BAND_2GHZ);
5507
5508         priv->ieee_channels = channels;
5509         priv->ieee_rates = rates;
5510
5511         iwl4965_init_hw_rates(priv, rates);
5512
5513         for (i = 0;  i < priv->channel_count; i++) {
5514                 ch = &priv->channel_info[i];
5515
5516                 /* FIXME: might be removed if scan is OK */
5517                 if (!is_channel_valid(ch))
5518                         continue;
5519
5520                 if (is_channel_a_band(ch))
5521                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5522                 else
5523                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5524
5525                 geo_ch = &sband->channels[sband->n_channels++];
5526
5527                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5528                 geo_ch->max_power = ch->max_power_avg;
5529                 geo_ch->max_antenna_gain = 0xff;
5530                 geo_ch->hw_value = ch->channel;
5531
5532                 if (is_channel_valid(ch)) {
5533                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5534                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5535
5536                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5537                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5538
5539                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5540                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5541
5542                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5543                                 priv->max_channel_txpower_limit =
5544                                     ch->max_power_avg;
5545                 } else {
5546                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5547                 }
5548
5549                 /* Save flags for reg domain usage */
5550                 geo_ch->orig_flags = geo_ch->flags;
5551
5552                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5553                                 ch->channel, geo_ch->center_freq,
5554                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5555                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5556                                 "restricted" : "valid",
5557                                  geo_ch->flags);
5558         }
5559
5560         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5561              priv->cfg->sku & IWL_SKU_A) {
5562                 printk(KERN_INFO DRV_NAME
5563                        ": Incorrectly detected BG card as ABG.  Please send "
5564                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5565                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5566                 priv->cfg->sku &= ~IWL_SKU_A;
5567         }
5568
5569         printk(KERN_INFO DRV_NAME
5570                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5571                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5572                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5573
5574         priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ];
5575         priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ];
5576
5577         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5578
5579         return 0;
5580 }
5581
5582 /*
5583  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5584  */
5585 static void iwl4965_free_geos(struct iwl4965_priv *priv)
5586 {
5587         kfree(priv->ieee_channels);
5588         kfree(priv->ieee_rates);
5589         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5590 }
5591
5592 /******************************************************************************
5593  *
5594  * uCode download functions
5595  *
5596  ******************************************************************************/
5597
5598 static void iwl4965_dealloc_ucode_pci(struct iwl4965_priv *priv)
5599 {
5600         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5601         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5602         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5603         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5604         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5605         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5606 }
5607
5608 /**
5609  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5610  *     looking at all data.
5611  */
5612 static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 *image,
5613                                  u32 len)
5614 {
5615         u32 val;
5616         u32 save_len = len;
5617         int rc = 0;
5618         u32 errcnt;
5619
5620         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5621
5622         rc = iwl4965_grab_nic_access(priv);
5623         if (rc)
5624                 return rc;
5625
5626         iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5627
5628         errcnt = 0;
5629         for (; len > 0; len -= sizeof(u32), image++) {
5630                 /* read data comes through single port, auto-incr addr */
5631                 /* NOTE: Use the debugless read so we don't flood kernel log
5632                  * if IWL_DL_IO is set */
5633                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5634                 if (val != le32_to_cpu(*image)) {
5635                         IWL_ERROR("uCode INST section is invalid at "
5636                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5637                                   save_len - len, val, le32_to_cpu(*image));
5638                         rc = -EIO;
5639                         errcnt++;
5640                         if (errcnt >= 20)
5641                                 break;
5642                 }
5643         }
5644
5645         iwl4965_release_nic_access(priv);
5646
5647         if (!errcnt)
5648                 IWL_DEBUG_INFO
5649                     ("ucode image in INSTRUCTION memory is good\n");
5650
5651         return rc;
5652 }
5653
5654
5655 /**
5656  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
5657  *   using sample data 100 bytes apart.  If these sample points are good,
5658  *   it's a pretty good bet that everything between them is good, too.
5659  */
5660 static int iwl4965_verify_inst_sparse(struct iwl4965_priv *priv, __le32 *image, u32 len)
5661 {
5662         u32 val;
5663         int rc = 0;
5664         u32 errcnt = 0;
5665         u32 i;
5666
5667         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5668
5669         rc = iwl4965_grab_nic_access(priv);
5670         if (rc)
5671                 return rc;
5672
5673         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5674                 /* read data comes through single port, auto-incr addr */
5675                 /* NOTE: Use the debugless read so we don't flood kernel log
5676                  * if IWL_DL_IO is set */
5677                 iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5678                         i + RTC_INST_LOWER_BOUND);
5679                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5680                 if (val != le32_to_cpu(*image)) {
5681 #if 0 /* Enable this if you want to see details */
5682                         IWL_ERROR("uCode INST section is invalid at "
5683                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5684                                   i, val, *image);
5685 #endif
5686                         rc = -EIO;
5687                         errcnt++;
5688                         if (errcnt >= 3)
5689                                 break;
5690                 }
5691         }
5692
5693         iwl4965_release_nic_access(priv);
5694
5695         return rc;
5696 }
5697
5698
5699 /**
5700  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
5701  *    and verify its contents
5702  */
5703 static int iwl4965_verify_ucode(struct iwl4965_priv *priv)
5704 {
5705         __le32 *image;
5706         u32 len;
5707         int rc = 0;
5708
5709         /* Try bootstrap */
5710         image = (__le32 *)priv->ucode_boot.v_addr;
5711         len = priv->ucode_boot.len;
5712         rc = iwl4965_verify_inst_sparse(priv, image, len);
5713         if (rc == 0) {
5714                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5715                 return 0;
5716         }
5717
5718         /* Try initialize */
5719         image = (__le32 *)priv->ucode_init.v_addr;
5720         len = priv->ucode_init.len;
5721         rc = iwl4965_verify_inst_sparse(priv, image, len);
5722         if (rc == 0) {
5723                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5724                 return 0;
5725         }
5726
5727         /* Try runtime/protocol */
5728         image = (__le32 *)priv->ucode_code.v_addr;
5729         len = priv->ucode_code.len;
5730         rc = iwl4965_verify_inst_sparse(priv, image, len);
5731         if (rc == 0) {
5732                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5733                 return 0;
5734         }
5735
5736         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5737
5738         /* Since nothing seems to match, show first several data entries in
5739          * instruction SRAM, so maybe visual inspection will give a clue.
5740          * Selection of bootstrap image (vs. other images) is arbitrary. */
5741         image = (__le32 *)priv->ucode_boot.v_addr;
5742         len = priv->ucode_boot.len;
5743         rc = iwl4965_verify_inst_full(priv, image, len);
5744
5745         return rc;
5746 }
5747
5748
5749 /* check contents of special bootstrap uCode SRAM */
5750 static int iwl4965_verify_bsm(struct iwl4965_priv *priv)
5751 {
5752         __le32 *image = priv->ucode_boot.v_addr;
5753         u32 len = priv->ucode_boot.len;
5754         u32 reg;
5755         u32 val;
5756
5757         IWL_DEBUG_INFO("Begin verify bsm\n");
5758
5759         /* verify BSM SRAM contents */
5760         val = iwl4965_read_prph(priv, BSM_WR_DWCOUNT_REG);
5761         for (reg = BSM_SRAM_LOWER_BOUND;
5762              reg < BSM_SRAM_LOWER_BOUND + len;
5763              reg += sizeof(u32), image ++) {
5764                 val = iwl4965_read_prph(priv, reg);
5765                 if (val != le32_to_cpu(*image)) {
5766                         IWL_ERROR("BSM uCode verification failed at "
5767                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5768                                   BSM_SRAM_LOWER_BOUND,
5769                                   reg - BSM_SRAM_LOWER_BOUND, len,
5770                                   val, le32_to_cpu(*image));
5771                         return -EIO;
5772                 }
5773         }
5774
5775         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5776
5777         return 0;
5778 }
5779
5780 /**
5781  * iwl4965_load_bsm - Load bootstrap instructions
5782  *
5783  * BSM operation:
5784  *
5785  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5786  * in special SRAM that does not power down during RFKILL.  When powering back
5787  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5788  * the bootstrap program into the on-board processor, and starts it.
5789  *
5790  * The bootstrap program loads (via DMA) instructions and data for a new
5791  * program from host DRAM locations indicated by the host driver in the
5792  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5793  * automatically.
5794  *
5795  * When initializing the NIC, the host driver points the BSM to the
5796  * "initialize" uCode image.  This uCode sets up some internal data, then
5797  * notifies host via "initialize alive" that it is complete.
5798  *
5799  * The host then replaces the BSM_DRAM_* pointer values to point to the
5800  * normal runtime uCode instructions and a backup uCode data cache buffer
5801  * (filled initially with starting data values for the on-board processor),
5802  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5803  * which begins normal operation.
5804  *
5805  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5806  * the backup data cache in DRAM before SRAM is powered down.
5807  *
5808  * When powering back up, the BSM loads the bootstrap program.  This reloads
5809  * the runtime uCode instructions and the backup data cache into SRAM,
5810  * and re-launches the runtime uCode from where it left off.
5811  */
5812 static int iwl4965_load_bsm(struct iwl4965_priv *priv)
5813 {
5814         __le32 *image = priv->ucode_boot.v_addr;
5815         u32 len = priv->ucode_boot.len;
5816         dma_addr_t pinst;
5817         dma_addr_t pdata;
5818         u32 inst_len;
5819         u32 data_len;
5820         int rc;
5821         int i;
5822         u32 done;
5823         u32 reg_offset;
5824
5825         IWL_DEBUG_INFO("Begin load bsm\n");
5826
5827         /* make sure bootstrap program is no larger than BSM's SRAM size */
5828         if (len > IWL_MAX_BSM_SIZE)
5829                 return -EINVAL;
5830
5831         /* Tell bootstrap uCode where to find the "Initialize" uCode
5832          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
5833          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
5834          *        after the "initialize" uCode has run, to point to
5835          *        runtime/protocol instructions and backup data cache. */
5836         pinst = priv->ucode_init.p_addr >> 4;
5837         pdata = priv->ucode_init_data.p_addr >> 4;
5838         inst_len = priv->ucode_init.len;
5839         data_len = priv->ucode_init_data.len;
5840
5841         rc = iwl4965_grab_nic_access(priv);
5842         if (rc)
5843                 return rc;
5844
5845         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5846         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5847         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5848         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5849
5850         /* Fill BSM memory with bootstrap instructions */
5851         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5852              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5853              reg_offset += sizeof(u32), image++)
5854                 _iwl4965_write_prph(priv, reg_offset,
5855                                           le32_to_cpu(*image));
5856
5857         rc = iwl4965_verify_bsm(priv);
5858         if (rc) {
5859                 iwl4965_release_nic_access(priv);
5860                 return rc;
5861         }
5862
5863         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5864         iwl4965_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5865         iwl4965_write_prph(priv, BSM_WR_MEM_DST_REG,
5866                                  RTC_INST_LOWER_BOUND);
5867         iwl4965_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5868
5869         /* Load bootstrap code into instruction SRAM now,
5870          *   to prepare to load "initialize" uCode */
5871         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
5872                 BSM_WR_CTRL_REG_BIT_START);
5873
5874         /* Wait for load of bootstrap uCode to finish */
5875         for (i = 0; i < 100; i++) {
5876                 done = iwl4965_read_prph(priv, BSM_WR_CTRL_REG);
5877                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5878                         break;
5879                 udelay(10);
5880         }
5881         if (i < 100)
5882                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5883         else {
5884                 IWL_ERROR("BSM write did not complete!\n");
5885                 return -EIO;
5886         }
5887
5888         /* Enable future boot loads whenever power management unit triggers it
5889          *   (e.g. when powering back up after power-save shutdown) */
5890         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
5891                 BSM_WR_CTRL_REG_BIT_START_EN);
5892
5893         iwl4965_release_nic_access(priv);
5894
5895         return 0;
5896 }
5897
5898 static void iwl4965_nic_start(struct iwl4965_priv *priv)
5899 {
5900         /* Remove all resets to allow NIC to operate */
5901         iwl4965_write32(priv, CSR_RESET, 0);
5902 }
5903
5904
5905 /**
5906  * iwl4965_read_ucode - Read uCode images from disk file.
5907  *
5908  * Copy into buffers for card to fetch via bus-mastering
5909  */
5910 static int iwl4965_read_ucode(struct iwl4965_priv *priv)
5911 {
5912         struct iwl4965_ucode *ucode;
5913         int ret;
5914         const struct firmware *ucode_raw;
5915         const char *name = priv->cfg->fw_name;
5916         u8 *src;
5917         size_t len;
5918         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5919
5920         /* Ask kernel firmware_class module to get the boot firmware off disk.
5921          * request_firmware() is synchronous, file is in memory on return. */
5922         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5923         if (ret < 0) {
5924                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5925                                         name, ret);
5926                 goto error;
5927         }
5928
5929         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5930                        name, ucode_raw->size);
5931
5932         /* Make sure that we got at least our header! */
5933         if (ucode_raw->size < sizeof(*ucode)) {
5934                 IWL_ERROR("File size way too small!\n");
5935                 ret = -EINVAL;
5936                 goto err_release;
5937         }
5938
5939         /* Data from ucode file:  header followed by uCode images */
5940         ucode = (void *)ucode_raw->data;
5941
5942         ver = le32_to_cpu(ucode->ver);
5943         inst_size = le32_to_cpu(ucode->inst_size);
5944         data_size = le32_to_cpu(ucode->data_size);
5945         init_size = le32_to_cpu(ucode->init_size);
5946         init_data_size = le32_to_cpu(ucode->init_data_size);
5947         boot_size = le32_to_cpu(ucode->boot_size);
5948
5949         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5950         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5951                        inst_size);
5952         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5953                        data_size);
5954         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5955                        init_size);
5956         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5957                        init_data_size);
5958         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5959                        boot_size);
5960
5961         /* Verify size of file vs. image size info in file's header */
5962         if (ucode_raw->size < sizeof(*ucode) +
5963                 inst_size + data_size + init_size +
5964                 init_data_size + boot_size) {
5965
5966                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5967                                (int)ucode_raw->size);
5968                 ret = -EINVAL;
5969                 goto err_release;
5970         }
5971
5972         /* Verify that uCode images will fit in card's SRAM */
5973         if (inst_size > IWL_MAX_INST_SIZE) {
5974                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5975                                inst_size);
5976                 ret = -EINVAL;
5977                 goto err_release;
5978         }
5979
5980         if (data_size > IWL_MAX_DATA_SIZE) {
5981                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5982                                 data_size);
5983                 ret = -EINVAL;
5984                 goto err_release;
5985         }
5986         if (init_size > IWL_MAX_INST_SIZE) {
5987                 IWL_DEBUG_INFO
5988                     ("uCode init instr len %d too large to fit in\n",
5989                       init_size);
5990                 ret = -EINVAL;
5991                 goto err_release;
5992         }
5993         if (init_data_size > IWL_MAX_DATA_SIZE) {
5994                 IWL_DEBUG_INFO
5995                     ("uCode init data len %d too large to fit in\n",
5996                       init_data_size);
5997                 ret = -EINVAL;
5998                 goto err_release;
5999         }
6000         if (boot_size > IWL_MAX_BSM_SIZE) {
6001                 IWL_DEBUG_INFO
6002                     ("uCode boot instr len %d too large to fit in\n",
6003                       boot_size);
6004                 ret = -EINVAL;
6005                 goto err_release;
6006         }
6007
6008         /* Allocate ucode buffers for card's bus-master loading ... */
6009
6010         /* Runtime instructions and 2 copies of data:
6011          * 1) unmodified from disk
6012          * 2) backup cache for save/restore during power-downs */
6013         priv->ucode_code.len = inst_size;
6014         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
6015
6016         priv->ucode_data.len = data_size;
6017         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
6018
6019         priv->ucode_data_backup.len = data_size;
6020         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
6021
6022         /* Initialization instructions and data */
6023         if (init_size && init_data_size) {
6024                 priv->ucode_init.len = init_size;
6025                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
6026
6027                 priv->ucode_init_data.len = init_data_size;
6028                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
6029
6030                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
6031                         goto err_pci_alloc;
6032         }
6033
6034         /* Bootstrap (instructions only, no data) */
6035         if (boot_size) {
6036                 priv->ucode_boot.len = boot_size;
6037                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
6038
6039                 if (!priv->ucode_boot.v_addr)
6040                         goto err_pci_alloc;
6041         }
6042
6043         /* Copy images into buffers for card's bus-master reads ... */
6044
6045         /* Runtime instructions (first block of data in file) */
6046         src = &ucode->data[0];
6047         len = priv->ucode_code.len;
6048         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
6049         memcpy(priv->ucode_code.v_addr, src, len);
6050         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6051                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6052
6053         /* Runtime data (2nd block)
6054          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
6055         src = &ucode->data[inst_size];
6056         len = priv->ucode_data.len;
6057         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
6058         memcpy(priv->ucode_data.v_addr, src, len);
6059         memcpy(priv->ucode_data_backup.v_addr, src, len);
6060
6061         /* Initialization instructions (3rd block) */
6062         if (init_size) {
6063                 src = &ucode->data[inst_size + data_size];
6064                 len = priv->ucode_init.len;
6065                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
6066                                 len);
6067                 memcpy(priv->ucode_init.v_addr, src, len);
6068         }
6069
6070         /* Initialization data (4th block) */
6071         if (init_data_size) {
6072                 src = &ucode->data[inst_size + data_size + init_size];
6073                 len = priv->ucode_init_data.len;
6074                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
6075                                len);
6076                 memcpy(priv->ucode_init_data.v_addr, src, len);
6077         }
6078
6079         /* Bootstrap instructions (5th block) */
6080         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6081         len = priv->ucode_boot.len;
6082         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
6083         memcpy(priv->ucode_boot.v_addr, src, len);
6084
6085         /* We have our copies now, allow OS release its copies */
6086         release_firmware(ucode_raw);
6087         return 0;
6088
6089  err_pci_alloc:
6090         IWL_ERROR("failed to allocate pci memory\n");
6091         ret = -ENOMEM;
6092         iwl4965_dealloc_ucode_pci(priv);
6093
6094  err_release:
6095         release_firmware(ucode_raw);
6096
6097  error:
6098         return ret;
6099 }
6100
6101
6102 /**
6103  * iwl4965_set_ucode_ptrs - Set uCode address location
6104  *
6105  * Tell initialization uCode where to find runtime uCode.
6106  *
6107  * BSM registers initially contain pointers to initialization uCode.
6108  * We need to replace them to load runtime uCode inst and data,
6109  * and to save runtime data when powering down.
6110  */
6111 static int iwl4965_set_ucode_ptrs(struct iwl4965_priv *priv)
6112 {
6113         dma_addr_t pinst;
6114         dma_addr_t pdata;
6115         int rc = 0;
6116         unsigned long flags;
6117
6118         /* bits 35:4 for 4965 */
6119         pinst = priv->ucode_code.p_addr >> 4;
6120         pdata = priv->ucode_data_backup.p_addr >> 4;
6121
6122         spin_lock_irqsave(&priv->lock, flags);
6123         rc = iwl4965_grab_nic_access(priv);
6124         if (rc) {
6125                 spin_unlock_irqrestore(&priv->lock, flags);
6126                 return rc;
6127         }
6128
6129         /* Tell bootstrap uCode where to find image to load */
6130         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6131         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6132         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6133                                  priv->ucode_data.len);
6134
6135         /* Inst bytecount must be last to set up, bit 31 signals uCode
6136          *   that all new ptr/size info is in place */
6137         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6138                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6139
6140         iwl4965_release_nic_access(priv);
6141
6142         spin_unlock_irqrestore(&priv->lock, flags);
6143
6144         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6145
6146         return rc;
6147 }
6148
6149 /**
6150  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
6151  *
6152  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6153  *
6154  * The 4965 "initialize" ALIVE reply contains calibration data for:
6155  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6156  *   (3945 does not contain this data).
6157  *
6158  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6159 */
6160 static void iwl4965_init_alive_start(struct iwl4965_priv *priv)
6161 {
6162         /* Check alive response for "valid" sign from uCode */
6163         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6164                 /* We had an error bringing up the hardware, so take it
6165                  * all the way back down so we can try again */
6166                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6167                 goto restart;
6168         }
6169
6170         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6171          * This is a paranoid check, because we would not have gotten the
6172          * "initialize" alive if code weren't properly loaded.  */
6173         if (iwl4965_verify_ucode(priv)) {
6174                 /* Runtime instruction load was bad;
6175                  * take it all the way back down so we can try again */
6176                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6177                 goto restart;
6178         }
6179
6180         /* Calculate temperature */
6181         priv->temperature = iwl4965_get_temperature(priv);
6182
6183         /* Send pointers to protocol/runtime uCode image ... init code will
6184          * load and launch runtime uCode, which will send us another "Alive"
6185          * notification. */
6186         IWL_DEBUG_INFO("Initialization Alive received.\n");
6187         if (iwl4965_set_ucode_ptrs(priv)) {
6188                 /* Runtime instruction load won't happen;
6189                  * take it all the way back down so we can try again */
6190                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6191                 goto restart;
6192         }
6193         return;
6194
6195  restart:
6196         queue_work(priv->workqueue, &priv->restart);
6197 }
6198
6199
6200 /**
6201  * iwl4965_alive_start - called after REPLY_ALIVE notification received
6202  *                   from protocol/runtime uCode (initialization uCode's
6203  *                   Alive gets handled by iwl4965_init_alive_start()).
6204  */
6205 static void iwl4965_alive_start(struct iwl4965_priv *priv)
6206 {
6207         int rc = 0;
6208
6209         IWL_DEBUG_INFO("Runtime Alive received.\n");
6210
6211         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6212                 /* We had an error bringing up the hardware, so take it
6213                  * all the way back down so we can try again */
6214                 IWL_DEBUG_INFO("Alive failed.\n");
6215                 goto restart;
6216         }
6217
6218         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6219          * This is a paranoid check, because we would not have gotten the
6220          * "runtime" alive if code weren't properly loaded.  */
6221         if (iwl4965_verify_ucode(priv)) {
6222                 /* Runtime instruction load was bad;
6223                  * take it all the way back down so we can try again */
6224                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6225                 goto restart;
6226         }
6227
6228         iwl4965_clear_stations_table(priv);
6229
6230         rc = iwl4965_alive_notify(priv);
6231         if (rc) {
6232                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6233                             rc);
6234                 goto restart;
6235         }
6236
6237         /* After the ALIVE response, we can send host commands to 4965 uCode */
6238         set_bit(STATUS_ALIVE, &priv->status);
6239
6240         /* Clear out the uCode error bit if it is set */
6241         clear_bit(STATUS_FW_ERROR, &priv->status);
6242
6243         if (iwl4965_is_rfkill(priv))
6244                 return;
6245
6246         ieee80211_start_queues(priv->hw);
6247
6248         priv->active_rate = priv->rates_mask;
6249         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6250
6251         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6252
6253         if (iwl4965_is_associated(priv)) {
6254                 struct iwl4965_rxon_cmd *active_rxon =
6255                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
6256
6257                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6258                        sizeof(priv->staging_rxon));
6259                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6260         } else {
6261                 /* Initialize our rx_config data */
6262                 iwl4965_connection_init_rx_config(priv);
6263                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6264         }
6265
6266         /* Configure Bluetooth device coexistence support */
6267         iwl4965_send_bt_config(priv);
6268
6269         /* Configure the adapter for unassociated operation */
6270         iwl4965_commit_rxon(priv);
6271
6272         /* At this point, the NIC is initialized and operational */
6273         priv->notif_missed_beacons = 0;
6274         set_bit(STATUS_READY, &priv->status);
6275
6276         iwl4965_rf_kill_ct_config(priv);
6277
6278         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6279         wake_up_interruptible(&priv->wait_command_queue);
6280
6281         if (priv->error_recovering)
6282                 iwl4965_error_recovery(priv);
6283
6284         return;
6285
6286  restart:
6287         queue_work(priv->workqueue, &priv->restart);
6288 }
6289
6290 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv);
6291
6292 static void __iwl4965_down(struct iwl4965_priv *priv)
6293 {
6294         unsigned long flags;
6295         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6296         struct ieee80211_conf *conf = NULL;
6297
6298         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6299
6300         conf = ieee80211_get_hw_conf(priv->hw);
6301
6302         if (!exit_pending)
6303                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6304
6305         iwl4965_clear_stations_table(priv);
6306
6307         /* Unblock any waiting calls */
6308         wake_up_interruptible_all(&priv->wait_command_queue);
6309
6310         /* Wipe out the EXIT_PENDING status bit if we are not actually
6311          * exiting the module */
6312         if (!exit_pending)
6313                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6314
6315         /* stop and reset the on-board processor */
6316         iwl4965_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6317
6318         /* tell the device to stop sending interrupts */
6319         iwl4965_disable_interrupts(priv);
6320
6321         if (priv->mac80211_registered)
6322                 ieee80211_stop_queues(priv->hw);
6323
6324         /* If we have not previously called iwl4965_init() then
6325          * clear all bits but the RF Kill and SUSPEND bits and return */
6326         if (!iwl4965_is_init(priv)) {
6327                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6328                                         STATUS_RF_KILL_HW |
6329                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6330                                         STATUS_RF_KILL_SW |
6331                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6332                                         STATUS_GEO_CONFIGURED |
6333                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6334                                         STATUS_IN_SUSPEND;
6335                 goto exit;
6336         }
6337
6338         /* ...otherwise clear out all the status bits but the RF Kill and
6339          * SUSPEND bits and continue taking the NIC down. */
6340         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6341                                 STATUS_RF_KILL_HW |
6342                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6343                                 STATUS_RF_KILL_SW |
6344                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6345                                 STATUS_GEO_CONFIGURED |
6346                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6347                                 STATUS_IN_SUSPEND |
6348                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6349                                 STATUS_FW_ERROR;
6350
6351         spin_lock_irqsave(&priv->lock, flags);
6352         iwl4965_clear_bit(priv, CSR_GP_CNTRL,
6353                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6354         spin_unlock_irqrestore(&priv->lock, flags);
6355
6356         iwl4965_hw_txq_ctx_stop(priv);
6357         iwl4965_hw_rxq_stop(priv);
6358
6359         spin_lock_irqsave(&priv->lock, flags);
6360         if (!iwl4965_grab_nic_access(priv)) {
6361                 iwl4965_write_prph(priv, APMG_CLK_DIS_REG,
6362                                          APMG_CLK_VAL_DMA_CLK_RQT);
6363                 iwl4965_release_nic_access(priv);
6364         }
6365         spin_unlock_irqrestore(&priv->lock, flags);
6366
6367         udelay(5);
6368
6369         iwl4965_hw_nic_stop_master(priv);
6370         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6371         iwl4965_hw_nic_reset(priv);
6372
6373  exit:
6374         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
6375
6376         if (priv->ibss_beacon)
6377                 dev_kfree_skb(priv->ibss_beacon);
6378         priv->ibss_beacon = NULL;
6379
6380         /* clear out any free frames */
6381         iwl4965_clear_free_frames(priv);
6382 }
6383
6384 static void iwl4965_down(struct iwl4965_priv *priv)
6385 {
6386         mutex_lock(&priv->mutex);
6387         __iwl4965_down(priv);
6388         mutex_unlock(&priv->mutex);
6389
6390         iwl4965_cancel_deferred_work(priv);
6391 }
6392
6393 #define MAX_HW_RESTARTS 5
6394
6395 static int __iwl4965_up(struct iwl4965_priv *priv)
6396 {
6397         int rc, i;
6398
6399         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6400                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6401                 return -EIO;
6402         }
6403
6404         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6405                 IWL_WARNING("Radio disabled by SW RF kill (module "
6406                             "parameter)\n");
6407                 return -ENODEV;
6408         }
6409
6410         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6411                 IWL_ERROR("ucode not available for device bringup\n");
6412                 return -EIO;
6413         }
6414
6415         /* If platform's RF_KILL switch is NOT set to KILL */
6416         if (iwl4965_read32(priv, CSR_GP_CNTRL) &
6417                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6418                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6419         else {
6420                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6421                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6422                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6423                         return -ENODEV;
6424                 }
6425         }
6426
6427         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6428
6429         rc = iwl4965_hw_nic_init(priv);
6430         if (rc) {
6431                 IWL_ERROR("Unable to int nic\n");
6432                 return rc;
6433         }
6434
6435         /* make sure rfkill handshake bits are cleared */
6436         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6437         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6438                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6439
6440         /* clear (again), then enable host interrupts */
6441         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6442         iwl4965_enable_interrupts(priv);
6443
6444         /* really make sure rfkill handshake bits are cleared */
6445         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6446         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6447
6448         /* Copy original ucode data image from disk into backup cache.
6449          * This will be used to initialize the on-board processor's
6450          * data SRAM for a clean start when the runtime program first loads. */
6451         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6452                priv->ucode_data.len);
6453
6454         /* We return success when we resume from suspend and rf_kill is on. */
6455         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6456                 return 0;
6457
6458         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6459
6460                 iwl4965_clear_stations_table(priv);
6461
6462                 /* load bootstrap state machine,
6463                  * load bootstrap program into processor's memory,
6464                  * prepare to load the "initialize" uCode */
6465                 rc = iwl4965_load_bsm(priv);
6466
6467                 if (rc) {
6468                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6469                         continue;
6470                 }
6471
6472                 /* start card; "initialize" will load runtime ucode */
6473                 iwl4965_nic_start(priv);
6474
6475                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6476
6477                 return 0;
6478         }
6479
6480         set_bit(STATUS_EXIT_PENDING, &priv->status);
6481         __iwl4965_down(priv);
6482
6483         /* tried to restart and config the device for as long as our
6484          * patience could withstand */
6485         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6486         return -EIO;
6487 }
6488
6489
6490 /*****************************************************************************
6491  *
6492  * Workqueue callbacks
6493  *
6494  *****************************************************************************/
6495
6496 static void iwl4965_bg_init_alive_start(struct work_struct *data)
6497 {
6498         struct iwl4965_priv *priv =
6499             container_of(data, struct iwl4965_priv, init_alive_start.work);
6500
6501         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6502                 return;
6503
6504         mutex_lock(&priv->mutex);
6505         iwl4965_init_alive_start(priv);
6506         mutex_unlock(&priv->mutex);
6507 }
6508
6509 static void iwl4965_bg_alive_start(struct work_struct *data)
6510 {
6511         struct iwl4965_priv *priv =
6512             container_of(data, struct iwl4965_priv, alive_start.work);
6513
6514         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6515                 return;
6516
6517         mutex_lock(&priv->mutex);
6518         iwl4965_alive_start(priv);
6519         mutex_unlock(&priv->mutex);
6520 }
6521
6522 static void iwl4965_bg_rf_kill(struct work_struct *work)
6523 {
6524         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, rf_kill);
6525
6526         wake_up_interruptible(&priv->wait_command_queue);
6527
6528         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6529                 return;
6530
6531         mutex_lock(&priv->mutex);
6532
6533         if (!iwl4965_is_rfkill(priv)) {
6534                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6535                           "HW and/or SW RF Kill no longer active, restarting "
6536                           "device\n");
6537                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6538                         queue_work(priv->workqueue, &priv->restart);
6539         } else {
6540
6541                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6542                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6543                                           "disabled by SW switch\n");
6544                 else
6545                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6546                                     "Kill switch must be turned off for "
6547                                     "wireless networking to work.\n");
6548         }
6549         mutex_unlock(&priv->mutex);
6550 }
6551
6552 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6553
6554 static void iwl4965_bg_scan_check(struct work_struct *data)
6555 {
6556         struct iwl4965_priv *priv =
6557             container_of(data, struct iwl4965_priv, scan_check.work);
6558
6559         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6560                 return;
6561
6562         mutex_lock(&priv->mutex);
6563         if (test_bit(STATUS_SCANNING, &priv->status) ||
6564             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6565                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6566                           "Scan completion watchdog resetting adapter (%dms)\n",
6567                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6568
6569                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6570                         iwl4965_send_scan_abort(priv);
6571         }
6572         mutex_unlock(&priv->mutex);
6573 }
6574
6575 static void iwl4965_bg_request_scan(struct work_struct *data)
6576 {
6577         struct iwl4965_priv *priv =
6578             container_of(data, struct iwl4965_priv, request_scan);
6579         struct iwl4965_host_cmd cmd = {
6580                 .id = REPLY_SCAN_CMD,
6581                 .len = sizeof(struct iwl4965_scan_cmd),
6582                 .meta.flags = CMD_SIZE_HUGE,
6583         };
6584         int rc = 0;
6585         struct iwl4965_scan_cmd *scan;
6586         struct ieee80211_conf *conf = NULL;
6587         u16 cmd_len;
6588         enum ieee80211_band band;
6589         u8 direct_mask;
6590
6591         conf = ieee80211_get_hw_conf(priv->hw);
6592
6593         mutex_lock(&priv->mutex);
6594
6595         if (!iwl4965_is_ready(priv)) {
6596                 IWL_WARNING("request scan called when driver not ready.\n");
6597                 goto done;
6598         }
6599
6600         /* Make sure the scan wasn't cancelled before this queued work
6601          * was given the chance to run... */
6602         if (!test_bit(STATUS_SCANNING, &priv->status))
6603                 goto done;
6604
6605         /* This should never be called or scheduled if there is currently
6606          * a scan active in the hardware. */
6607         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6608                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6609                                "Ignoring second request.\n");
6610                 rc = -EIO;
6611                 goto done;
6612         }
6613
6614         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6615                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6616                 goto done;
6617         }
6618
6619         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6620                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6621                 goto done;
6622         }
6623
6624         if (iwl4965_is_rfkill(priv)) {
6625                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6626                 goto done;
6627         }
6628
6629         if (!test_bit(STATUS_READY, &priv->status)) {
6630                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6631                 goto done;
6632         }
6633
6634         if (!priv->scan_bands) {
6635                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6636                 goto done;
6637         }
6638
6639         if (!priv->scan) {
6640                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
6641                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6642                 if (!priv->scan) {
6643                         rc = -ENOMEM;
6644                         goto done;
6645                 }
6646         }
6647         scan = priv->scan;
6648         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
6649
6650         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6651         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6652
6653         if (iwl4965_is_associated(priv)) {
6654                 u16 interval = 0;
6655                 u32 extra;
6656                 u32 suspend_time = 100;
6657                 u32 scan_suspend_time = 100;
6658                 unsigned long flags;
6659
6660                 IWL_DEBUG_INFO("Scanning while associated...\n");
6661
6662                 spin_lock_irqsave(&priv->lock, flags);
6663                 interval = priv->beacon_int;
6664                 spin_unlock_irqrestore(&priv->lock, flags);
6665
6666                 scan->suspend_time = 0;
6667                 scan->max_out_time = cpu_to_le32(200 * 1024);
6668                 if (!interval)
6669                         interval = suspend_time;
6670
6671                 extra = (suspend_time / interval) << 22;
6672                 scan_suspend_time = (extra |
6673                     ((suspend_time % interval) * 1024));
6674                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6675                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6676                                scan_suspend_time, interval);
6677         }
6678
6679         /* We should add the ability for user to lock to PASSIVE ONLY */
6680         if (priv->one_direct_scan) {
6681                 IWL_DEBUG_SCAN
6682                     ("Kicking off one direct scan for '%s'\n",
6683                      iwl4965_escape_essid(priv->direct_ssid,
6684                                       priv->direct_ssid_len));
6685                 scan->direct_scan[0].id = WLAN_EID_SSID;
6686                 scan->direct_scan[0].len = priv->direct_ssid_len;
6687                 memcpy(scan->direct_scan[0].ssid,
6688                        priv->direct_ssid, priv->direct_ssid_len);
6689                 direct_mask = 1;
6690         } else if (!iwl4965_is_associated(priv) && priv->essid_len) {
6691                 scan->direct_scan[0].id = WLAN_EID_SSID;
6692                 scan->direct_scan[0].len = priv->essid_len;
6693                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6694                 direct_mask = 1;
6695         } else
6696                 direct_mask = 0;
6697
6698         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6699         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6700         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6701
6702
6703         switch (priv->scan_bands) {
6704         case 2:
6705                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6706                 scan->tx_cmd.rate_n_flags =
6707                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6708                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6709
6710                 scan->good_CRC_th = 0;
6711                 band = IEEE80211_BAND_2GHZ;
6712                 break;
6713
6714         case 1:
6715                 scan->tx_cmd.rate_n_flags =
6716                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6717                                 RATE_MCS_ANT_B_MSK);
6718                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6719                 band = IEEE80211_BAND_5GHZ;
6720                 break;
6721
6722         default:
6723                 IWL_WARNING("Invalid scan band count\n");
6724                 goto done;
6725         }
6726
6727         /* We don't build a direct scan probe request; the uCode will do
6728          * that based on the direct_mask added to each channel entry */
6729         cmd_len = iwl4965_fill_probe_req(priv, band,
6730                                         (struct ieee80211_mgmt *)scan->data,
6731                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
6732
6733         scan->tx_cmd.len = cpu_to_le16(cmd_len);
6734         /* select Rx chains */
6735
6736         /* Force use of chains B and C (0x6) for scan Rx.
6737          * Avoid A (0x1) because of its off-channel reception on A-band.
6738          * MIMO is not used here, but value is required to make uCode happy. */
6739         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
6740                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
6741                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
6742                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
6743
6744         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6745                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6746
6747         if (direct_mask) {
6748                 IWL_DEBUG_SCAN
6749                     ("Initiating direct scan for %s.\n",
6750                      iwl4965_escape_essid(priv->essid, priv->essid_len));
6751                 scan->channel_count =
6752                         iwl4965_get_channels_for_scan(
6753                                 priv, band, 1, /* active */
6754                                 direct_mask,
6755                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6756         } else {
6757                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6758                 scan->channel_count =
6759                         iwl4965_get_channels_for_scan(
6760                                 priv, band, 0, /* passive */
6761                                 direct_mask,
6762                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6763         }
6764
6765         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6766             scan->channel_count * sizeof(struct iwl4965_scan_channel);
6767         cmd.data = scan;
6768         scan->len = cpu_to_le16(cmd.len);
6769
6770         set_bit(STATUS_SCAN_HW, &priv->status);
6771         rc = iwl4965_send_cmd_sync(priv, &cmd);
6772         if (rc)
6773                 goto done;
6774
6775         queue_delayed_work(priv->workqueue, &priv->scan_check,
6776                            IWL_SCAN_CHECK_WATCHDOG);
6777
6778         mutex_unlock(&priv->mutex);
6779         return;
6780
6781  done:
6782         /* inform mac80211 scan aborted */
6783         queue_work(priv->workqueue, &priv->scan_completed);
6784         mutex_unlock(&priv->mutex);
6785 }
6786
6787 static void iwl4965_bg_up(struct work_struct *data)
6788 {
6789         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, up);
6790
6791         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6792                 return;
6793
6794         mutex_lock(&priv->mutex);
6795         __iwl4965_up(priv);
6796         mutex_unlock(&priv->mutex);
6797 }
6798
6799 static void iwl4965_bg_restart(struct work_struct *data)
6800 {
6801         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, restart);
6802
6803         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6804                 return;
6805
6806         iwl4965_down(priv);
6807         queue_work(priv->workqueue, &priv->up);
6808 }
6809
6810 static void iwl4965_bg_rx_replenish(struct work_struct *data)
6811 {
6812         struct iwl4965_priv *priv =
6813             container_of(data, struct iwl4965_priv, rx_replenish);
6814
6815         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6816                 return;
6817
6818         mutex_lock(&priv->mutex);
6819         iwl4965_rx_replenish(priv);
6820         mutex_unlock(&priv->mutex);
6821 }
6822
6823 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6824
6825 static void iwl4965_bg_post_associate(struct work_struct *data)
6826 {
6827         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv,
6828                                              post_associate.work);
6829
6830         int rc = 0;
6831         struct ieee80211_conf *conf = NULL;
6832         DECLARE_MAC_BUF(mac);
6833
6834         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6835                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6836                 return;
6837         }
6838
6839         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6840                         priv->assoc_id,
6841                         print_mac(mac, priv->active_rxon.bssid_addr));
6842
6843
6844         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6845                 return;
6846
6847         mutex_lock(&priv->mutex);
6848
6849         if (!priv->vif || !priv->is_open) {
6850                 mutex_unlock(&priv->mutex);
6851                 return;
6852         }
6853         iwl4965_scan_cancel_timeout(priv, 200);
6854
6855         conf = ieee80211_get_hw_conf(priv->hw);
6856
6857         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6858         iwl4965_commit_rxon(priv);
6859
6860         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6861         iwl4965_setup_rxon_timing(priv);
6862         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6863                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6864         if (rc)
6865                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6866                             "Attempting to continue.\n");
6867
6868         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6869
6870 #ifdef CONFIG_IWL4965_HT
6871         if (priv->current_ht_config.is_ht)
6872                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
6873 #endif /* CONFIG_IWL4965_HT*/
6874         iwl4965_set_rxon_chain(priv);
6875         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6876
6877         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6878                         priv->assoc_id, priv->beacon_int);
6879
6880         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6881                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6882         else
6883                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6884
6885         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6886                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6887                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6888                 else
6889                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6890
6891                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6892                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6893
6894         }
6895
6896         iwl4965_commit_rxon(priv);
6897
6898         switch (priv->iw_mode) {
6899         case IEEE80211_IF_TYPE_STA:
6900                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6901                 break;
6902
6903         case IEEE80211_IF_TYPE_IBSS:
6904
6905                 /* clear out the station table */
6906                 iwl4965_clear_stations_table(priv);
6907
6908                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6909                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6910                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6911                 iwl4965_send_beacon_cmd(priv);
6912
6913                 break;
6914
6915         default:
6916                 IWL_ERROR("%s Should not be called in %d mode\n",
6917                                 __FUNCTION__, priv->iw_mode);
6918                 break;
6919         }
6920
6921         iwl4965_sequence_reset(priv);
6922
6923 #ifdef CONFIG_IWL4965_SENSITIVITY
6924         /* Enable Rx differential gain and sensitivity calibrations */
6925         iwl4965_chain_noise_reset(priv);
6926         priv->start_calib = 1;
6927 #endif /* CONFIG_IWL4965_SENSITIVITY */
6928
6929         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6930                 priv->assoc_station_added = 1;
6931
6932         iwl4965_activate_qos(priv, 0);
6933
6934         /* we have just associated, don't start scan too early */
6935         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6936         mutex_unlock(&priv->mutex);
6937 }
6938
6939 static void iwl4965_bg_abort_scan(struct work_struct *work)
6940 {
6941         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, abort_scan);
6942
6943         if (!iwl4965_is_ready(priv))
6944                 return;
6945
6946         mutex_lock(&priv->mutex);
6947
6948         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6949         iwl4965_send_scan_abort(priv);
6950
6951         mutex_unlock(&priv->mutex);
6952 }
6953
6954 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6955
6956 static void iwl4965_bg_scan_completed(struct work_struct *work)
6957 {
6958         struct iwl4965_priv *priv =
6959             container_of(work, struct iwl4965_priv, scan_completed);
6960
6961         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6962
6963         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6964                 return;
6965
6966         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6967                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6968
6969         ieee80211_scan_completed(priv->hw);
6970
6971         /* Since setting the TXPOWER may have been deferred while
6972          * performing the scan, fire one off */
6973         mutex_lock(&priv->mutex);
6974         iwl4965_hw_reg_send_txpower(priv);
6975         mutex_unlock(&priv->mutex);
6976 }
6977
6978 /*****************************************************************************
6979  *
6980  * mac80211 entry point functions
6981  *
6982  *****************************************************************************/
6983
6984 #define UCODE_READY_TIMEOUT     (2 * HZ)
6985
6986 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6987 {
6988         struct iwl4965_priv *priv = hw->priv;
6989         int ret;
6990
6991         IWL_DEBUG_MAC80211("enter\n");
6992
6993         if (pci_enable_device(priv->pci_dev)) {
6994                 IWL_ERROR("Fail to pci_enable_device\n");
6995                 return -ENODEV;
6996         }
6997         pci_restore_state(priv->pci_dev);
6998         pci_enable_msi(priv->pci_dev);
6999
7000         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
7001                           DRV_NAME, priv);
7002         if (ret) {
7003                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
7004                 goto out_disable_msi;
7005         }
7006
7007         /* we should be verifying the device is ready to be opened */
7008         mutex_lock(&priv->mutex);
7009
7010         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
7011         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
7012          * ucode filename and max sizes are card-specific. */
7013
7014         if (!priv->ucode_code.len) {
7015                 ret = iwl4965_read_ucode(priv);
7016                 if (ret) {
7017                         IWL_ERROR("Could not read microcode: %d\n", ret);
7018                         mutex_unlock(&priv->mutex);
7019                         goto out_release_irq;
7020                 }
7021         }
7022
7023         ret = __iwl4965_up(priv);
7024
7025         mutex_unlock(&priv->mutex);
7026
7027         if (ret)
7028                 goto out_release_irq;
7029
7030         IWL_DEBUG_INFO("Start UP work done.\n");
7031
7032         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
7033                 return 0;
7034
7035         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
7036          * mac80211 will not be run successfully. */
7037         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
7038                         test_bit(STATUS_READY, &priv->status),
7039                         UCODE_READY_TIMEOUT);
7040         if (!ret) {
7041                 if (!test_bit(STATUS_READY, &priv->status)) {
7042                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
7043                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
7044                         ret = -ETIMEDOUT;
7045                         goto out_release_irq;
7046                 }
7047         }
7048
7049         priv->is_open = 1;
7050         IWL_DEBUG_MAC80211("leave\n");
7051         return 0;
7052
7053 out_release_irq:
7054         free_irq(priv->pci_dev->irq, priv);
7055 out_disable_msi:
7056         pci_disable_msi(priv->pci_dev);
7057         pci_disable_device(priv->pci_dev);
7058         priv->is_open = 0;
7059         IWL_DEBUG_MAC80211("leave - failed\n");
7060         return ret;
7061 }
7062
7063 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
7064 {
7065         struct iwl4965_priv *priv = hw->priv;
7066
7067         IWL_DEBUG_MAC80211("enter\n");
7068
7069         if (!priv->is_open) {
7070                 IWL_DEBUG_MAC80211("leave - skip\n");
7071                 return;
7072         }
7073
7074         priv->is_open = 0;
7075
7076         if (iwl4965_is_ready_rf(priv)) {
7077                 /* stop mac, cancel any scan request and clear
7078                  * RXON_FILTER_ASSOC_MSK BIT
7079                  */
7080                 mutex_lock(&priv->mutex);
7081                 iwl4965_scan_cancel_timeout(priv, 100);
7082                 cancel_delayed_work(&priv->post_associate);
7083                 mutex_unlock(&priv->mutex);
7084         }
7085
7086         iwl4965_down(priv);
7087
7088         flush_workqueue(priv->workqueue);
7089         free_irq(priv->pci_dev->irq, priv);
7090         pci_disable_msi(priv->pci_dev);
7091         pci_save_state(priv->pci_dev);
7092         pci_disable_device(priv->pci_dev);
7093
7094         IWL_DEBUG_MAC80211("leave\n");
7095 }
7096
7097 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7098                       struct ieee80211_tx_control *ctl)
7099 {
7100         struct iwl4965_priv *priv = hw->priv;
7101
7102         IWL_DEBUG_MAC80211("enter\n");
7103
7104         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7105                 IWL_DEBUG_MAC80211("leave - monitor\n");
7106                 return -1;
7107         }
7108
7109         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7110                      ctl->tx_rate->bitrate);
7111
7112         if (iwl4965_tx_skb(priv, skb, ctl))
7113                 dev_kfree_skb_any(skb);
7114
7115         IWL_DEBUG_MAC80211("leave\n");
7116         return 0;
7117 }
7118
7119 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
7120                                  struct ieee80211_if_init_conf *conf)
7121 {
7122         struct iwl4965_priv *priv = hw->priv;
7123         unsigned long flags;
7124         DECLARE_MAC_BUF(mac);
7125
7126         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
7127
7128         if (priv->vif) {
7129                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
7130                 return -EOPNOTSUPP;
7131         }
7132
7133         spin_lock_irqsave(&priv->lock, flags);
7134         priv->vif = conf->vif;
7135
7136         spin_unlock_irqrestore(&priv->lock, flags);
7137
7138         mutex_lock(&priv->mutex);
7139
7140         if (conf->mac_addr) {
7141                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7142                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7143         }
7144
7145         if (iwl4965_is_ready(priv))
7146                 iwl4965_set_mode(priv, conf->type);
7147
7148         mutex_unlock(&priv->mutex);
7149
7150         IWL_DEBUG_MAC80211("leave\n");
7151         return 0;
7152 }
7153
7154 /**
7155  * iwl4965_mac_config - mac80211 config callback
7156  *
7157  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7158  * be set inappropriately and the driver currently sets the hardware up to
7159  * use it whenever needed.
7160  */
7161 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7162 {
7163         struct iwl4965_priv *priv = hw->priv;
7164         const struct iwl4965_channel_info *ch_info;
7165         unsigned long flags;
7166         int ret = 0;
7167
7168         mutex_lock(&priv->mutex);
7169         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
7170
7171         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7172
7173         if (!iwl4965_is_ready(priv)) {
7174                 IWL_DEBUG_MAC80211("leave - not ready\n");
7175                 ret = -EIO;
7176                 goto out;
7177         }
7178
7179         if (unlikely(!iwl4965_param_disable_hw_scan &&
7180                      test_bit(STATUS_SCANNING, &priv->status))) {
7181                 IWL_DEBUG_MAC80211("leave - scanning\n");
7182                 set_bit(STATUS_CONF_PENDING, &priv->status);
7183                 mutex_unlock(&priv->mutex);
7184                 return 0;
7185         }
7186
7187         spin_lock_irqsave(&priv->lock, flags);
7188
7189         ch_info = iwl4965_get_channel_info(priv, conf->channel->band,
7190                         ieee80211_frequency_to_channel(conf->channel->center_freq));
7191         if (!is_channel_valid(ch_info)) {
7192                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7193                 spin_unlock_irqrestore(&priv->lock, flags);
7194                 ret = -EINVAL;
7195                 goto out;
7196         }
7197
7198 #ifdef CONFIG_IWL4965_HT
7199         /* if we are switching from ht to 2.4 clear flags
7200          * from any ht related info since 2.4 does not
7201          * support ht */
7202         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
7203 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7204             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7205 #endif
7206         )
7207                 priv->staging_rxon.flags = 0;
7208 #endif /* CONFIG_IWL4965_HT */
7209
7210         iwl4965_set_rxon_channel(priv, conf->channel->band,
7211                 ieee80211_frequency_to_channel(conf->channel->center_freq));
7212
7213         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
7214
7215         /* The list of supported rates and rate mask can be different
7216          * for each band; since the band may have changed, reset
7217          * the rate mask to what mac80211 lists */
7218         iwl4965_set_rate(priv);
7219
7220         spin_unlock_irqrestore(&priv->lock, flags);
7221
7222 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7223         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7224                 iwl4965_hw_channel_switch(priv, conf->channel);
7225                 goto out;
7226         }
7227 #endif
7228
7229         iwl4965_radio_kill_sw(priv, !conf->radio_enabled);
7230
7231         if (!conf->radio_enabled) {
7232                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7233                 goto out;
7234         }
7235
7236         if (iwl4965_is_rfkill(priv)) {
7237                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7238                 ret = -EIO;
7239                 goto out;
7240         }
7241
7242         iwl4965_set_rate(priv);
7243
7244         if (memcmp(&priv->active_rxon,
7245                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7246                 iwl4965_commit_rxon(priv);
7247         else
7248                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7249
7250         IWL_DEBUG_MAC80211("leave\n");
7251
7252 out:
7253         clear_bit(STATUS_CONF_PENDING, &priv->status);
7254         mutex_unlock(&priv->mutex);
7255         return ret;
7256 }
7257
7258 static void iwl4965_config_ap(struct iwl4965_priv *priv)
7259 {
7260         int rc = 0;
7261
7262         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7263                 return;
7264
7265         /* The following should be done only at AP bring up */
7266         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7267
7268                 /* RXON - unassoc (to set timing command) */
7269                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7270                 iwl4965_commit_rxon(priv);
7271
7272                 /* RXON Timing */
7273                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7274                 iwl4965_setup_rxon_timing(priv);
7275                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7276                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7277                 if (rc)
7278                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7279                                         "Attempting to continue.\n");
7280
7281                 iwl4965_set_rxon_chain(priv);
7282
7283                 /* FIXME: what should be the assoc_id for AP? */
7284                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7285                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7286                         priv->staging_rxon.flags |=
7287                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7288                 else
7289                         priv->staging_rxon.flags &=
7290                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7291
7292                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7293                         if (priv->assoc_capability &
7294                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7295                                 priv->staging_rxon.flags |=
7296                                         RXON_FLG_SHORT_SLOT_MSK;
7297                         else
7298                                 priv->staging_rxon.flags &=
7299                                         ~RXON_FLG_SHORT_SLOT_MSK;
7300
7301                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7302                                 priv->staging_rxon.flags &=
7303                                         ~RXON_FLG_SHORT_SLOT_MSK;
7304                 }
7305                 /* restore RXON assoc */
7306                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7307                 iwl4965_commit_rxon(priv);
7308                 iwl4965_activate_qos(priv, 1);
7309                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7310         }
7311         iwl4965_send_beacon_cmd(priv);
7312
7313         /* FIXME - we need to add code here to detect a totally new
7314          * configuration, reset the AP, unassoc, rxon timing, assoc,
7315          * clear sta table, add BCAST sta... */
7316 }
7317
7318 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
7319                                         struct ieee80211_vif *vif,
7320                                     struct ieee80211_if_conf *conf)
7321 {
7322         struct iwl4965_priv *priv = hw->priv;
7323         DECLARE_MAC_BUF(mac);
7324         unsigned long flags;
7325         int rc;
7326
7327         if (conf == NULL)
7328                 return -EIO;
7329
7330         if (priv->vif != vif) {
7331                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7332                 mutex_unlock(&priv->mutex);
7333                 return 0;
7334         }
7335
7336         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7337             (!conf->beacon || !conf->ssid_len)) {
7338                 IWL_DEBUG_MAC80211
7339                     ("Leaving in AP mode because HostAPD is not ready.\n");
7340                 return 0;
7341         }
7342
7343         if (!iwl4965_is_alive(priv))
7344                 return -EAGAIN;
7345
7346         mutex_lock(&priv->mutex);
7347
7348         if (conf->bssid)
7349                 IWL_DEBUG_MAC80211("bssid: %s\n",
7350                                    print_mac(mac, conf->bssid));
7351
7352 /*
7353  * very dubious code was here; the probe filtering flag is never set:
7354  *
7355         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7356             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7357  */
7358
7359         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7360                 if (!conf->bssid) {
7361                         conf->bssid = priv->mac_addr;
7362                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7363                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7364                                            print_mac(mac, conf->bssid));
7365                 }
7366                 if (priv->ibss_beacon)
7367                         dev_kfree_skb(priv->ibss_beacon);
7368
7369                 priv->ibss_beacon = conf->beacon;
7370         }
7371
7372         if (iwl4965_is_rfkill(priv))
7373                 goto done;
7374
7375         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7376             !is_multicast_ether_addr(conf->bssid)) {
7377                 /* If there is currently a HW scan going on in the background
7378                  * then we need to cancel it else the RXON below will fail. */
7379                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
7380                         IWL_WARNING("Aborted scan still in progress "
7381                                     "after 100ms\n");
7382                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7383                         mutex_unlock(&priv->mutex);
7384                         return -EAGAIN;
7385                 }
7386                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7387
7388                 /* TODO: Audit driver for usage of these members and see
7389                  * if mac80211 deprecates them (priv->bssid looks like it
7390                  * shouldn't be there, but I haven't scanned the IBSS code
7391                  * to verify) - jpk */
7392                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7393
7394                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7395                         iwl4965_config_ap(priv);
7396                 else {
7397                         rc = iwl4965_commit_rxon(priv);
7398                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7399                                 iwl4965_rxon_add_station(
7400                                         priv, priv->active_rxon.bssid_addr, 1);
7401                 }
7402
7403         } else {
7404                 iwl4965_scan_cancel_timeout(priv, 100);
7405                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7406                 iwl4965_commit_rxon(priv);
7407         }
7408
7409  done:
7410         spin_lock_irqsave(&priv->lock, flags);
7411         if (!conf->ssid_len)
7412                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7413         else
7414                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7415
7416         priv->essid_len = conf->ssid_len;
7417         spin_unlock_irqrestore(&priv->lock, flags);
7418
7419         IWL_DEBUG_MAC80211("leave\n");
7420         mutex_unlock(&priv->mutex);
7421
7422         return 0;
7423 }
7424
7425 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
7426                                  unsigned int changed_flags,
7427                                  unsigned int *total_flags,
7428                                  int mc_count, struct dev_addr_list *mc_list)
7429 {
7430         /*
7431          * XXX: dummy
7432          * see also iwl4965_connection_init_rx_config
7433          */
7434         *total_flags = 0;
7435 }
7436
7437 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
7438                                      struct ieee80211_if_init_conf *conf)
7439 {
7440         struct iwl4965_priv *priv = hw->priv;
7441
7442         IWL_DEBUG_MAC80211("enter\n");
7443
7444         mutex_lock(&priv->mutex);
7445
7446         if (iwl4965_is_ready_rf(priv)) {
7447                 iwl4965_scan_cancel_timeout(priv, 100);
7448                 cancel_delayed_work(&priv->post_associate);
7449                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7450                 iwl4965_commit_rxon(priv);
7451         }
7452         if (priv->vif == conf->vif) {
7453                 priv->vif = NULL;
7454                 memset(priv->bssid, 0, ETH_ALEN);
7455                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7456                 priv->essid_len = 0;
7457         }
7458         mutex_unlock(&priv->mutex);
7459
7460         IWL_DEBUG_MAC80211("leave\n");
7461
7462 }
7463
7464 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
7465                                      struct ieee80211_vif *vif,
7466                                      struct ieee80211_bss_conf *bss_conf,
7467                                      u32 changes)
7468 {
7469         struct iwl4965_priv *priv = hw->priv;
7470
7471         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
7472                 if (bss_conf->use_short_preamble)
7473                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7474                 else
7475                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7476         }
7477
7478         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
7479                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
7480                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7481                 else
7482                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7483         }
7484
7485         if (changes & BSS_CHANGED_ASSOC) {
7486                 /*
7487                  * TODO:
7488                  * do stuff instead of sniffing assoc resp
7489                  */
7490         }
7491
7492         if (iwl4965_is_associated(priv))
7493                 iwl4965_send_rxon_assoc(priv);
7494 }
7495
7496 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7497 {
7498         int rc = 0;
7499         unsigned long flags;
7500         struct iwl4965_priv *priv = hw->priv;
7501
7502         IWL_DEBUG_MAC80211("enter\n");
7503
7504         mutex_lock(&priv->mutex);
7505         spin_lock_irqsave(&priv->lock, flags);
7506
7507         if (!iwl4965_is_ready_rf(priv)) {
7508                 rc = -EIO;
7509                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7510                 goto out_unlock;
7511         }
7512
7513         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7514                 rc = -EIO;
7515                 IWL_ERROR("ERROR: APs don't scan\n");
7516                 goto out_unlock;
7517         }
7518
7519         /* we don't schedule scan within next_scan_jiffies period */
7520         if (priv->next_scan_jiffies &&
7521                         time_after(priv->next_scan_jiffies, jiffies)) {
7522                 rc = -EAGAIN;
7523                 goto out_unlock;
7524         }
7525         /* if we just finished scan ask for delay */
7526         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7527                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7528                 rc = -EAGAIN;
7529                 goto out_unlock;
7530         }
7531         if (len) {
7532                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7533                                iwl4965_escape_essid(ssid, len), (int)len);
7534
7535                 priv->one_direct_scan = 1;
7536                 priv->direct_ssid_len = (u8)
7537                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7538                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7539         } else
7540                 priv->one_direct_scan = 0;
7541
7542         rc = iwl4965_scan_initiate(priv);
7543
7544         IWL_DEBUG_MAC80211("leave\n");
7545
7546 out_unlock:
7547         spin_unlock_irqrestore(&priv->lock, flags);
7548         mutex_unlock(&priv->mutex);
7549
7550         return rc;
7551 }
7552
7553 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7554                            const u8 *local_addr, const u8 *addr,
7555                            struct ieee80211_key_conf *key)
7556 {
7557         struct iwl4965_priv *priv = hw->priv;
7558         DECLARE_MAC_BUF(mac);
7559         int rc = 0;
7560         u8 sta_id;
7561
7562         IWL_DEBUG_MAC80211("enter\n");
7563
7564         if (!iwl4965_param_hwcrypto) {
7565                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7566                 return -EOPNOTSUPP;
7567         }
7568
7569         if (is_zero_ether_addr(addr))
7570                 /* only support pairwise keys */
7571                 return -EOPNOTSUPP;
7572
7573         sta_id = iwl4965_hw_find_station(priv, addr);
7574         if (sta_id == IWL_INVALID_STATION) {
7575                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7576                                    print_mac(mac, addr));
7577                 return -EINVAL;
7578         }
7579
7580         mutex_lock(&priv->mutex);
7581
7582         iwl4965_scan_cancel_timeout(priv, 100);
7583
7584         switch (cmd) {
7585         case  SET_KEY:
7586                 rc = iwl4965_update_sta_key_info(priv, key, sta_id);
7587                 if (!rc) {
7588                         iwl4965_set_rxon_hwcrypto(priv, 1);
7589                         iwl4965_commit_rxon(priv);
7590                         key->hw_key_idx = sta_id;
7591                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7592                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7593                 }
7594                 break;
7595         case DISABLE_KEY:
7596                 rc = iwl4965_clear_sta_key_info(priv, sta_id);
7597                 if (!rc) {
7598                         iwl4965_set_rxon_hwcrypto(priv, 0);
7599                         iwl4965_commit_rxon(priv);
7600                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7601                 }
7602                 break;
7603         default:
7604                 rc = -EINVAL;
7605         }
7606
7607         IWL_DEBUG_MAC80211("leave\n");
7608         mutex_unlock(&priv->mutex);
7609
7610         return rc;
7611 }
7612
7613 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7614                            const struct ieee80211_tx_queue_params *params)
7615 {
7616         struct iwl4965_priv *priv = hw->priv;
7617         unsigned long flags;
7618         int q;
7619
7620         IWL_DEBUG_MAC80211("enter\n");
7621
7622         if (!iwl4965_is_ready_rf(priv)) {
7623                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7624                 return -EIO;
7625         }
7626
7627         if (queue >= AC_NUM) {
7628                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7629                 return 0;
7630         }
7631
7632         if (!priv->qos_data.qos_enable) {
7633                 priv->qos_data.qos_active = 0;
7634                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7635                 return 0;
7636         }
7637         q = AC_NUM - 1 - queue;
7638
7639         spin_lock_irqsave(&priv->lock, flags);
7640
7641         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7642         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7643         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7644         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7645                         cpu_to_le16((params->txop * 32));
7646
7647         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7648         priv->qos_data.qos_active = 1;
7649
7650         spin_unlock_irqrestore(&priv->lock, flags);
7651
7652         mutex_lock(&priv->mutex);
7653         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7654                 iwl4965_activate_qos(priv, 1);
7655         else if (priv->assoc_id && iwl4965_is_associated(priv))
7656                 iwl4965_activate_qos(priv, 0);
7657
7658         mutex_unlock(&priv->mutex);
7659
7660         IWL_DEBUG_MAC80211("leave\n");
7661         return 0;
7662 }
7663
7664 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
7665                                 struct ieee80211_tx_queue_stats *stats)
7666 {
7667         struct iwl4965_priv *priv = hw->priv;
7668         int i, avail;
7669         struct iwl4965_tx_queue *txq;
7670         struct iwl4965_queue *q;
7671         unsigned long flags;
7672
7673         IWL_DEBUG_MAC80211("enter\n");
7674
7675         if (!iwl4965_is_ready_rf(priv)) {
7676                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7677                 return -EIO;
7678         }
7679
7680         spin_lock_irqsave(&priv->lock, flags);
7681
7682         for (i = 0; i < AC_NUM; i++) {
7683                 txq = &priv->txq[i];
7684                 q = &txq->q;
7685                 avail = iwl4965_queue_space(q);
7686
7687                 stats->data[i].len = q->n_window - avail;
7688                 stats->data[i].limit = q->n_window - q->high_mark;
7689                 stats->data[i].count = q->n_window;
7690
7691         }
7692         spin_unlock_irqrestore(&priv->lock, flags);
7693
7694         IWL_DEBUG_MAC80211("leave\n");
7695
7696         return 0;
7697 }
7698
7699 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
7700                              struct ieee80211_low_level_stats *stats)
7701 {
7702         IWL_DEBUG_MAC80211("enter\n");
7703         IWL_DEBUG_MAC80211("leave\n");
7704
7705         return 0;
7706 }
7707
7708 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
7709 {
7710         IWL_DEBUG_MAC80211("enter\n");
7711         IWL_DEBUG_MAC80211("leave\n");
7712
7713         return 0;
7714 }
7715
7716 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7717 {
7718         struct iwl4965_priv *priv = hw->priv;
7719         unsigned long flags;
7720
7721         mutex_lock(&priv->mutex);
7722         IWL_DEBUG_MAC80211("enter\n");
7723
7724         priv->lq_mngr.lq_ready = 0;
7725 #ifdef CONFIG_IWL4965_HT
7726         spin_lock_irqsave(&priv->lock, flags);
7727         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7728         spin_unlock_irqrestore(&priv->lock, flags);
7729 #endif /* CONFIG_IWL4965_HT */
7730
7731         iwl4965_reset_qos(priv);
7732
7733         cancel_delayed_work(&priv->post_associate);
7734
7735         spin_lock_irqsave(&priv->lock, flags);
7736         priv->assoc_id = 0;
7737         priv->assoc_capability = 0;
7738         priv->call_post_assoc_from_beacon = 0;
7739         priv->assoc_station_added = 0;
7740
7741         /* new association get rid of ibss beacon skb */
7742         if (priv->ibss_beacon)
7743                 dev_kfree_skb(priv->ibss_beacon);
7744
7745         priv->ibss_beacon = NULL;
7746
7747         priv->beacon_int = priv->hw->conf.beacon_int;
7748         priv->timestamp1 = 0;
7749         priv->timestamp0 = 0;
7750         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7751                 priv->beacon_int = 0;
7752
7753         spin_unlock_irqrestore(&priv->lock, flags);
7754
7755         if (!iwl4965_is_ready_rf(priv)) {
7756                 IWL_DEBUG_MAC80211("leave - not ready\n");
7757                 mutex_unlock(&priv->mutex);
7758                 return;
7759         }
7760
7761         /* we are restarting association process
7762          * clear RXON_FILTER_ASSOC_MSK bit
7763          */
7764         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7765                 iwl4965_scan_cancel_timeout(priv, 100);
7766                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7767                 iwl4965_commit_rxon(priv);
7768         }
7769
7770         /* Per mac80211.h: This is only used in IBSS mode... */
7771         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7772
7773                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7774                 mutex_unlock(&priv->mutex);
7775                 return;
7776         }
7777
7778         priv->only_active_channel = 0;
7779
7780         iwl4965_set_rate(priv);
7781
7782         mutex_unlock(&priv->mutex);
7783
7784         IWL_DEBUG_MAC80211("leave\n");
7785 }
7786
7787 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7788                                  struct ieee80211_tx_control *control)
7789 {
7790         struct iwl4965_priv *priv = hw->priv;
7791         unsigned long flags;
7792
7793         mutex_lock(&priv->mutex);
7794         IWL_DEBUG_MAC80211("enter\n");
7795
7796         if (!iwl4965_is_ready_rf(priv)) {
7797                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7798                 mutex_unlock(&priv->mutex);
7799                 return -EIO;
7800         }
7801
7802         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7803                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7804                 mutex_unlock(&priv->mutex);
7805                 return -EIO;
7806         }
7807
7808         spin_lock_irqsave(&priv->lock, flags);
7809
7810         if (priv->ibss_beacon)
7811                 dev_kfree_skb(priv->ibss_beacon);
7812
7813         priv->ibss_beacon = skb;
7814
7815         priv->assoc_id = 0;
7816
7817         IWL_DEBUG_MAC80211("leave\n");
7818         spin_unlock_irqrestore(&priv->lock, flags);
7819
7820         iwl4965_reset_qos(priv);
7821
7822         queue_work(priv->workqueue, &priv->post_associate.work);
7823
7824         mutex_unlock(&priv->mutex);
7825
7826         return 0;
7827 }
7828
7829 #ifdef CONFIG_IWL4965_HT
7830
7831 static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
7832                                  struct iwl4965_priv *priv)
7833 {
7834         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
7835         struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
7836         struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
7837
7838         IWL_DEBUG_MAC80211("enter: \n");
7839
7840         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
7841                 iwl_conf->is_ht = 0;
7842                 return;
7843         }
7844
7845         iwl_conf->is_ht = 1;
7846         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
7847
7848         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
7849                 iwl_conf->sgf |= 0x1;
7850         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
7851                 iwl_conf->sgf |= 0x2;
7852
7853         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
7854         iwl_conf->max_amsdu_size =
7855                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
7856
7857         iwl_conf->supported_chan_width =
7858                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
7859         iwl_conf->extension_chan_offset =
7860                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
7861         /* If no above or below channel supplied disable FAT channel */
7862         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
7863             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
7864                 iwl_conf->supported_chan_width = 0;
7865
7866         iwl_conf->tx_mimo_ps_mode =
7867                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
7868         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
7869
7870         iwl_conf->control_channel = ht_bss_conf->primary_channel;
7871         iwl_conf->tx_chan_width =
7872                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
7873         iwl_conf->ht_protection =
7874                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
7875         iwl_conf->non_GF_STA_present =
7876                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
7877
7878         IWL_DEBUG_MAC80211("control channel %d\n",
7879                 iwl_conf->control_channel);
7880         IWL_DEBUG_MAC80211("leave\n");
7881 }
7882
7883 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
7884                                struct ieee80211_conf *conf)
7885 {
7886         struct iwl4965_priv *priv = hw->priv;
7887
7888         IWL_DEBUG_MAC80211("enter: \n");
7889
7890         iwl4965_ht_info_fill(conf, priv);
7891         iwl4965_set_rxon_chain(priv);
7892
7893         if (priv && priv->assoc_id &&
7894             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
7895                 unsigned long flags;
7896
7897                 spin_lock_irqsave(&priv->lock, flags);
7898                 if (priv->beacon_int)
7899                         queue_work(priv->workqueue, &priv->post_associate.work);
7900                 else
7901                         priv->call_post_assoc_from_beacon = 1;
7902                 spin_unlock_irqrestore(&priv->lock, flags);
7903         }
7904
7905         IWL_DEBUG_MAC80211("leave:\n");
7906         return 0;
7907 }
7908
7909 #endif /*CONFIG_IWL4965_HT*/
7910
7911 /*****************************************************************************
7912  *
7913  * sysfs attributes
7914  *
7915  *****************************************************************************/
7916
7917 #ifdef CONFIG_IWL4965_DEBUG
7918
7919 /*
7920  * The following adds a new attribute to the sysfs representation
7921  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7922  * used for controlling the debug level.
7923  *
7924  * See the level definitions in iwl for details.
7925  */
7926
7927 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7928 {
7929         return sprintf(buf, "0x%08X\n", iwl4965_debug_level);
7930 }
7931 static ssize_t store_debug_level(struct device_driver *d,
7932                                  const char *buf, size_t count)
7933 {
7934         char *p = (char *)buf;
7935         u32 val;
7936
7937         val = simple_strtoul(p, &p, 0);
7938         if (p == buf)
7939                 printk(KERN_INFO DRV_NAME
7940                        ": %s is not in hex or decimal form.\n", buf);
7941         else
7942                 iwl4965_debug_level = val;
7943
7944         return strnlen(buf, count);
7945 }
7946
7947 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7948                    show_debug_level, store_debug_level);
7949
7950 #endif /* CONFIG_IWL4965_DEBUG */
7951
7952 static ssize_t show_rf_kill(struct device *d,
7953                             struct device_attribute *attr, char *buf)
7954 {
7955         /*
7956          * 0 - RF kill not enabled
7957          * 1 - SW based RF kill active (sysfs)
7958          * 2 - HW based RF kill active
7959          * 3 - Both HW and SW based RF kill active
7960          */
7961         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
7962         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7963                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7964
7965         return sprintf(buf, "%i\n", val);
7966 }
7967
7968 static ssize_t store_rf_kill(struct device *d,
7969                              struct device_attribute *attr,
7970                              const char *buf, size_t count)
7971 {
7972         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
7973
7974         mutex_lock(&priv->mutex);
7975         iwl4965_radio_kill_sw(priv, buf[0] == '1');
7976         mutex_unlock(&priv->mutex);
7977
7978         return count;
7979 }
7980
7981 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7982
7983 static ssize_t show_temperature(struct device *d,
7984                                 struct device_attribute *attr, char *buf)
7985 {
7986         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
7987
7988         if (!iwl4965_is_alive(priv))
7989                 return -EAGAIN;
7990
7991         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7992 }
7993
7994 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7995
7996 static ssize_t show_rs_window(struct device *d,
7997                               struct device_attribute *attr,
7998                               char *buf)
7999 {
8000         struct iwl4965_priv *priv = d->driver_data;
8001         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8002 }
8003 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8004
8005 static ssize_t show_tx_power(struct device *d,
8006                              struct device_attribute *attr, char *buf)
8007 {
8008         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8009         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8010 }
8011
8012 static ssize_t store_tx_power(struct device *d,
8013                               struct device_attribute *attr,
8014                               const char *buf, size_t count)
8015 {
8016         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8017         char *p = (char *)buf;
8018         u32 val;
8019
8020         val = simple_strtoul(p, &p, 10);
8021         if (p == buf)
8022                 printk(KERN_INFO DRV_NAME
8023                        ": %s is not in decimal form.\n", buf);
8024         else
8025                 iwl4965_hw_reg_set_txpower(priv, val);
8026
8027         return count;
8028 }
8029
8030 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8031
8032 static ssize_t show_flags(struct device *d,
8033                           struct device_attribute *attr, char *buf)
8034 {
8035         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8036
8037         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8038 }
8039
8040 static ssize_t store_flags(struct device *d,
8041                            struct device_attribute *attr,
8042                            const char *buf, size_t count)
8043 {
8044         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8045         u32 flags = simple_strtoul(buf, NULL, 0);
8046
8047         mutex_lock(&priv->mutex);
8048         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8049                 /* Cancel any currently running scans... */
8050                 if (iwl4965_scan_cancel_timeout(priv, 100))
8051                         IWL_WARNING("Could not cancel scan.\n");
8052                 else {
8053                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8054                                        flags);
8055                         priv->staging_rxon.flags = cpu_to_le32(flags);
8056                         iwl4965_commit_rxon(priv);
8057                 }
8058         }
8059         mutex_unlock(&priv->mutex);
8060
8061         return count;
8062 }
8063
8064 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8065
8066 static ssize_t show_filter_flags(struct device *d,
8067                                  struct device_attribute *attr, char *buf)
8068 {
8069         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8070
8071         return sprintf(buf, "0x%04X\n",
8072                 le32_to_cpu(priv->active_rxon.filter_flags));
8073 }
8074
8075 static ssize_t store_filter_flags(struct device *d,
8076                                   struct device_attribute *attr,
8077                                   const char *buf, size_t count)
8078 {
8079         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8080         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8081
8082         mutex_lock(&priv->mutex);
8083         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8084                 /* Cancel any currently running scans... */
8085                 if (iwl4965_scan_cancel_timeout(priv, 100))
8086                         IWL_WARNING("Could not cancel scan.\n");
8087                 else {
8088                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8089                                        "0x%04X\n", filter_flags);
8090                         priv->staging_rxon.filter_flags =
8091                                 cpu_to_le32(filter_flags);
8092                         iwl4965_commit_rxon(priv);
8093                 }
8094         }
8095         mutex_unlock(&priv->mutex);
8096
8097         return count;
8098 }
8099
8100 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8101                    store_filter_flags);
8102
8103 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8104
8105 static ssize_t show_measurement(struct device *d,
8106                                 struct device_attribute *attr, char *buf)
8107 {
8108         struct iwl4965_priv *priv = dev_get_drvdata(d);
8109         struct iwl4965_spectrum_notification measure_report;
8110         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8111         u8 *data = (u8 *) & measure_report;
8112         unsigned long flags;
8113
8114         spin_lock_irqsave(&priv->lock, flags);
8115         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8116                 spin_unlock_irqrestore(&priv->lock, flags);
8117                 return 0;
8118         }
8119         memcpy(&measure_report, &priv->measure_report, size);
8120         priv->measurement_status = 0;
8121         spin_unlock_irqrestore(&priv->lock, flags);
8122
8123         while (size && (PAGE_SIZE - len)) {
8124                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8125                                    PAGE_SIZE - len, 1);
8126                 len = strlen(buf);
8127                 if (PAGE_SIZE - len)
8128                         buf[len++] = '\n';
8129
8130                 ofs += 16;
8131                 size -= min(size, 16U);
8132         }
8133
8134         return len;
8135 }
8136
8137 static ssize_t store_measurement(struct device *d,
8138                                  struct device_attribute *attr,
8139                                  const char *buf, size_t count)
8140 {
8141         struct iwl4965_priv *priv = dev_get_drvdata(d);
8142         struct ieee80211_measurement_params params = {
8143                 .channel = le16_to_cpu(priv->active_rxon.channel),
8144                 .start_time = cpu_to_le64(priv->last_tsf),
8145                 .duration = cpu_to_le16(1),
8146         };
8147         u8 type = IWL_MEASURE_BASIC;
8148         u8 buffer[32];
8149         u8 channel;
8150
8151         if (count) {
8152                 char *p = buffer;
8153                 strncpy(buffer, buf, min(sizeof(buffer), count));
8154                 channel = simple_strtoul(p, NULL, 0);
8155                 if (channel)
8156                         params.channel = channel;
8157
8158                 p = buffer;
8159                 while (*p && *p != ' ')
8160                         p++;
8161                 if (*p)
8162                         type = simple_strtoul(p + 1, NULL, 0);
8163         }
8164
8165         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8166                        "channel %d (for '%s')\n", type, params.channel, buf);
8167         iwl4965_get_measurement(priv, &params, type);
8168
8169         return count;
8170 }
8171
8172 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8173                    show_measurement, store_measurement);
8174 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
8175
8176 static ssize_t store_retry_rate(struct device *d,
8177                                 struct device_attribute *attr,
8178                                 const char *buf, size_t count)
8179 {
8180         struct iwl4965_priv *priv = dev_get_drvdata(d);
8181
8182         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8183         if (priv->retry_rate <= 0)
8184                 priv->retry_rate = 1;
8185
8186         return count;
8187 }
8188
8189 static ssize_t show_retry_rate(struct device *d,
8190                                struct device_attribute *attr, char *buf)
8191 {
8192         struct iwl4965_priv *priv = dev_get_drvdata(d);
8193         return sprintf(buf, "%d", priv->retry_rate);
8194 }
8195
8196 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8197                    store_retry_rate);
8198
8199 static ssize_t store_power_level(struct device *d,
8200                                  struct device_attribute *attr,
8201                                  const char *buf, size_t count)
8202 {
8203         struct iwl4965_priv *priv = dev_get_drvdata(d);
8204         int rc;
8205         int mode;
8206
8207         mode = simple_strtoul(buf, NULL, 0);
8208         mutex_lock(&priv->mutex);
8209
8210         if (!iwl4965_is_ready(priv)) {
8211                 rc = -EAGAIN;
8212                 goto out;
8213         }
8214
8215         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8216                 mode = IWL_POWER_AC;
8217         else
8218                 mode |= IWL_POWER_ENABLED;
8219
8220         if (mode != priv->power_mode) {
8221                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8222                 if (rc) {
8223                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8224                         goto out;
8225                 }
8226                 priv->power_mode = mode;
8227         }
8228
8229         rc = count;
8230
8231  out:
8232         mutex_unlock(&priv->mutex);
8233         return rc;
8234 }
8235
8236 #define MAX_WX_STRING 80
8237
8238 /* Values are in microsecond */
8239 static const s32 timeout_duration[] = {
8240         350000,
8241         250000,
8242         75000,
8243         37000,
8244         25000,
8245 };
8246 static const s32 period_duration[] = {
8247         400000,
8248         700000,
8249         1000000,
8250         1000000,
8251         1000000
8252 };
8253
8254 static ssize_t show_power_level(struct device *d,
8255                                 struct device_attribute *attr, char *buf)
8256 {
8257         struct iwl4965_priv *priv = dev_get_drvdata(d);
8258         int level = IWL_POWER_LEVEL(priv->power_mode);
8259         char *p = buf;
8260
8261         p += sprintf(p, "%d ", level);
8262         switch (level) {
8263         case IWL_POWER_MODE_CAM:
8264         case IWL_POWER_AC:
8265                 p += sprintf(p, "(AC)");
8266                 break;
8267         case IWL_POWER_BATTERY:
8268                 p += sprintf(p, "(BATTERY)");
8269                 break;
8270         default:
8271                 p += sprintf(p,
8272                              "(Timeout %dms, Period %dms)",
8273                              timeout_duration[level - 1] / 1000,
8274                              period_duration[level - 1] / 1000);
8275         }
8276
8277         if (!(priv->power_mode & IWL_POWER_ENABLED))
8278                 p += sprintf(p, " OFF\n");
8279         else
8280                 p += sprintf(p, " \n");
8281
8282         return (p - buf + 1);
8283
8284 }
8285
8286 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8287                    store_power_level);
8288
8289 static ssize_t show_channels(struct device *d,
8290                              struct device_attribute *attr, char *buf)
8291 {
8292         /* all this shit doesn't belong into sysfs anyway */
8293         return 0;
8294 }
8295
8296 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8297
8298 static ssize_t show_statistics(struct device *d,
8299                                struct device_attribute *attr, char *buf)
8300 {
8301         struct iwl4965_priv *priv = dev_get_drvdata(d);
8302         u32 size = sizeof(struct iwl4965_notif_statistics);
8303         u32 len = 0, ofs = 0;
8304         u8 *data = (u8 *) & priv->statistics;
8305         int rc = 0;
8306
8307         if (!iwl4965_is_alive(priv))
8308                 return -EAGAIN;
8309
8310         mutex_lock(&priv->mutex);
8311         rc = iwl4965_send_statistics_request(priv);
8312         mutex_unlock(&priv->mutex);
8313
8314         if (rc) {
8315                 len = sprintf(buf,
8316                               "Error sending statistics request: 0x%08X\n", rc);
8317                 return len;
8318         }
8319
8320         while (size && (PAGE_SIZE - len)) {
8321                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8322                                    PAGE_SIZE - len, 1);
8323                 len = strlen(buf);
8324                 if (PAGE_SIZE - len)
8325                         buf[len++] = '\n';
8326
8327                 ofs += 16;
8328                 size -= min(size, 16U);
8329         }
8330
8331         return len;
8332 }
8333
8334 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8335
8336 static ssize_t show_antenna(struct device *d,
8337                             struct device_attribute *attr, char *buf)
8338 {
8339         struct iwl4965_priv *priv = dev_get_drvdata(d);
8340
8341         if (!iwl4965_is_alive(priv))
8342                 return -EAGAIN;
8343
8344         return sprintf(buf, "%d\n", priv->antenna);
8345 }
8346
8347 static ssize_t store_antenna(struct device *d,
8348                              struct device_attribute *attr,
8349                              const char *buf, size_t count)
8350 {
8351         int ant;
8352         struct iwl4965_priv *priv = dev_get_drvdata(d);
8353
8354         if (count == 0)
8355                 return 0;
8356
8357         if (sscanf(buf, "%1i", &ant) != 1) {
8358                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8359                 return count;
8360         }
8361
8362         if ((ant >= 0) && (ant <= 2)) {
8363                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8364                 priv->antenna = (enum iwl4965_antenna)ant;
8365         } else
8366                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8367
8368
8369         return count;
8370 }
8371
8372 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8373
8374 static ssize_t show_status(struct device *d,
8375                            struct device_attribute *attr, char *buf)
8376 {
8377         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8378         if (!iwl4965_is_alive(priv))
8379                 return -EAGAIN;
8380         return sprintf(buf, "0x%08x\n", (int)priv->status);
8381 }
8382
8383 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8384
8385 static ssize_t dump_error_log(struct device *d,
8386                               struct device_attribute *attr,
8387                               const char *buf, size_t count)
8388 {
8389         char *p = (char *)buf;
8390
8391         if (p[0] == '1')
8392                 iwl4965_dump_nic_error_log((struct iwl4965_priv *)d->driver_data);
8393
8394         return strnlen(buf, count);
8395 }
8396
8397 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8398
8399 static ssize_t dump_event_log(struct device *d,
8400                               struct device_attribute *attr,
8401                               const char *buf, size_t count)
8402 {
8403         char *p = (char *)buf;
8404
8405         if (p[0] == '1')
8406                 iwl4965_dump_nic_event_log((struct iwl4965_priv *)d->driver_data);
8407
8408         return strnlen(buf, count);
8409 }
8410
8411 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8412
8413 /*****************************************************************************
8414  *
8415  * driver setup and teardown
8416  *
8417  *****************************************************************************/
8418
8419 static void iwl4965_setup_deferred_work(struct iwl4965_priv *priv)
8420 {
8421         priv->workqueue = create_workqueue(DRV_NAME);
8422
8423         init_waitqueue_head(&priv->wait_command_queue);
8424
8425         INIT_WORK(&priv->up, iwl4965_bg_up);
8426         INIT_WORK(&priv->restart, iwl4965_bg_restart);
8427         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
8428         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
8429         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
8430         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
8431         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
8432         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
8433         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
8434         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
8435         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
8436         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
8437
8438         iwl4965_hw_setup_deferred_work(priv);
8439
8440         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8441                      iwl4965_irq_tasklet, (unsigned long)priv);
8442 }
8443
8444 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv)
8445 {
8446         iwl4965_hw_cancel_deferred_work(priv);
8447
8448         cancel_delayed_work_sync(&priv->init_alive_start);
8449         cancel_delayed_work(&priv->scan_check);
8450         cancel_delayed_work(&priv->alive_start);
8451         cancel_delayed_work(&priv->post_associate);
8452         cancel_work_sync(&priv->beacon_update);
8453 }
8454
8455 static struct attribute *iwl4965_sysfs_entries[] = {
8456         &dev_attr_antenna.attr,
8457         &dev_attr_channels.attr,
8458         &dev_attr_dump_errors.attr,
8459         &dev_attr_dump_events.attr,
8460         &dev_attr_flags.attr,
8461         &dev_attr_filter_flags.attr,
8462 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8463         &dev_attr_measurement.attr,
8464 #endif
8465         &dev_attr_power_level.attr,
8466         &dev_attr_retry_rate.attr,
8467         &dev_attr_rf_kill.attr,
8468         &dev_attr_rs_window.attr,
8469         &dev_attr_statistics.attr,
8470         &dev_attr_status.attr,
8471         &dev_attr_temperature.attr,
8472         &dev_attr_tx_power.attr,
8473
8474         NULL
8475 };
8476
8477 static struct attribute_group iwl4965_attribute_group = {
8478         .name = NULL,           /* put in device directory */
8479         .attrs = iwl4965_sysfs_entries,
8480 };
8481
8482 static struct ieee80211_ops iwl4965_hw_ops = {
8483         .tx = iwl4965_mac_tx,
8484         .start = iwl4965_mac_start,
8485         .stop = iwl4965_mac_stop,
8486         .add_interface = iwl4965_mac_add_interface,
8487         .remove_interface = iwl4965_mac_remove_interface,
8488         .config = iwl4965_mac_config,
8489         .config_interface = iwl4965_mac_config_interface,
8490         .configure_filter = iwl4965_configure_filter,
8491         .set_key = iwl4965_mac_set_key,
8492         .get_stats = iwl4965_mac_get_stats,
8493         .get_tx_stats = iwl4965_mac_get_tx_stats,
8494         .conf_tx = iwl4965_mac_conf_tx,
8495         .get_tsf = iwl4965_mac_get_tsf,
8496         .reset_tsf = iwl4965_mac_reset_tsf,
8497         .beacon_update = iwl4965_mac_beacon_update,
8498         .bss_info_changed = iwl4965_bss_info_changed,
8499 #ifdef CONFIG_IWL4965_HT
8500         .conf_ht = iwl4965_mac_conf_ht,
8501         .ampdu_action = iwl4965_mac_ampdu_action,
8502 #endif  /* CONFIG_IWL4965_HT */
8503         .hw_scan = iwl4965_mac_hw_scan
8504 };
8505
8506 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8507 {
8508         int err = 0;
8509         struct iwl4965_priv *priv;
8510         struct ieee80211_hw *hw;
8511         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
8512         int i;
8513         DECLARE_MAC_BUF(mac);
8514
8515         /* Disabling hardware scan means that mac80211 will perform scans
8516          * "the hard way", rather than using device's scan. */
8517         if (iwl4965_param_disable_hw_scan) {
8518                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8519                 iwl4965_hw_ops.hw_scan = NULL;
8520         }
8521
8522         if ((iwl4965_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8523             (iwl4965_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8524                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8525                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8526                 err = -EINVAL;
8527                 goto out;
8528         }
8529
8530         /* mac80211 allocates memory for this device instance, including
8531          *   space for this driver's private structure */
8532         hw = ieee80211_alloc_hw(sizeof(struct iwl4965_priv), &iwl4965_hw_ops);
8533         if (hw == NULL) {
8534                 IWL_ERROR("Can not allocate network device\n");
8535                 err = -ENOMEM;
8536                 goto out;
8537         }
8538         SET_IEEE80211_DEV(hw, &pdev->dev);
8539
8540         hw->rate_control_algorithm = "iwl-4965-rs";
8541
8542         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8543         priv = hw->priv;
8544         priv->hw = hw;
8545         priv->cfg = cfg;
8546
8547         priv->pci_dev = pdev;
8548         priv->antenna = (enum iwl4965_antenna)iwl4965_param_antenna;
8549 #ifdef CONFIG_IWL4965_DEBUG
8550         iwl4965_debug_level = iwl4965_param_debug;
8551         atomic_set(&priv->restrict_refcnt, 0);
8552 #endif
8553         priv->retry_rate = 1;
8554
8555         priv->ibss_beacon = NULL;
8556
8557         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8558          *   the range of signal quality values that we'll provide.
8559          * Negative values for level/noise indicate that we'll provide dBm.
8560          * For WE, at least, non-0 values here *enable* display of values
8561          *   in app (iwconfig). */
8562         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8563         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8564         hw->max_signal = 100;   /* link quality indication (%) */
8565
8566         /* Tell mac80211 our Tx characteristics */
8567         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8568
8569         /* Default value; 4 EDCA QOS priorities */
8570         hw->queues = 4;
8571 #ifdef CONFIG_IWL4965_HT
8572         /* Enhanced value; more queues, to support 11n aggregation */
8573         hw->queues = 16;
8574 #endif /* CONFIG_IWL4965_HT */
8575
8576         spin_lock_init(&priv->lock);
8577         spin_lock_init(&priv->power_data.lock);
8578         spin_lock_init(&priv->sta_lock);
8579         spin_lock_init(&priv->hcmd_lock);
8580         spin_lock_init(&priv->lq_mngr.lock);
8581
8582         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8583                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8584
8585         INIT_LIST_HEAD(&priv->free_frames);
8586
8587         mutex_init(&priv->mutex);
8588         if (pci_enable_device(pdev)) {
8589                 err = -ENODEV;
8590                 goto out_ieee80211_free_hw;
8591         }
8592
8593         pci_set_master(pdev);
8594
8595         /* Clear the driver's (not device's) station table */
8596         iwl4965_clear_stations_table(priv);
8597
8598         priv->data_retry_limit = -1;
8599         priv->ieee_channels = NULL;
8600         priv->ieee_rates = NULL;
8601         priv->band = IEEE80211_BAND_2GHZ;
8602
8603         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8604         if (!err)
8605                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8606         if (err) {
8607                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8608                 goto out_pci_disable_device;
8609         }
8610
8611         pci_set_drvdata(pdev, priv);
8612         err = pci_request_regions(pdev, DRV_NAME);
8613         if (err)
8614                 goto out_pci_disable_device;
8615
8616         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8617          * PCI Tx retries from interfering with C3 CPU state */
8618         pci_write_config_byte(pdev, 0x41, 0x00);
8619
8620         priv->hw_base = pci_iomap(pdev, 0, 0);
8621         if (!priv->hw_base) {
8622                 err = -ENODEV;
8623                 goto out_pci_release_regions;
8624         }
8625
8626         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8627                         (unsigned long long) pci_resource_len(pdev, 0));
8628         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8629
8630         /* Initialize module parameter values here */
8631
8632         /* Disable radio (SW RF KILL) via parameter when loading driver */
8633         if (iwl4965_param_disable) {
8634                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8635                 IWL_DEBUG_INFO("Radio disabled.\n");
8636         }
8637
8638         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8639
8640         priv->ps_mode = 0;
8641         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
8642         priv->valid_antenna = 0x7;      /* assume all 3 connected */
8643         priv->ps_mode = IWL_MIMO_PS_NONE;
8644
8645         /* Choose which receivers/antennas to use */
8646         iwl4965_set_rxon_chain(priv);
8647
8648
8649         printk(KERN_INFO DRV_NAME
8650                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8651
8652         /* Device-specific setup */
8653         if (iwl4965_hw_set_hw_setting(priv)) {
8654                 IWL_ERROR("failed to set hw settings\n");
8655                 goto out_iounmap;
8656         }
8657
8658         if (iwl4965_param_qos_enable)
8659                 priv->qos_data.qos_enable = 1;
8660
8661         iwl4965_reset_qos(priv);
8662
8663         priv->qos_data.qos_active = 0;
8664         priv->qos_data.qos_cap.val = 0;
8665
8666         iwl4965_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8667         iwl4965_setup_deferred_work(priv);
8668         iwl4965_setup_rx_handlers(priv);
8669
8670         priv->rates_mask = IWL_RATES_MASK;
8671         /* If power management is turned on, default to AC mode */
8672         priv->power_mode = IWL_POWER_AC;
8673         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8674
8675         iwl4965_disable_interrupts(priv);
8676
8677         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8678         if (err) {
8679                 IWL_ERROR("failed to create sysfs device attributes\n");
8680                 goto out_release_irq;
8681         }
8682
8683         /* nic init */
8684         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8685                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8686
8687         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8688         err = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
8689                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8690                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8691         if (err < 0) {
8692                 IWL_DEBUG_INFO("Failed to init the card\n");
8693                 goto out_remove_sysfs;
8694         }
8695         /* Read the EEPROM */
8696         err = iwl_eeprom_init(priv);
8697         if (err) {
8698                 IWL_ERROR("Unable to init EEPROM\n");
8699                 goto out_remove_sysfs;
8700         }
8701         /* MAC Address location in EEPROM same for 3945/4965 */
8702         iwl_eeprom_get_mac(priv, priv->mac_addr);
8703         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8704         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8705
8706         err = iwl4965_init_channel_map(priv);
8707         if (err) {
8708                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8709                 goto out_remove_sysfs;
8710         }
8711
8712         err = iwl4965_init_geos(priv);
8713         if (err) {
8714                 IWL_ERROR("initializing geos failed: %d\n", err);
8715                 goto out_free_channel_map;
8716         }
8717
8718         iwl4965_rate_control_register(priv->hw);
8719         err = ieee80211_register_hw(priv->hw);
8720         if (err) {
8721                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8722                 goto out_free_geos;
8723         }
8724
8725         priv->hw->conf.beacon_int = 100;
8726         priv->mac80211_registered = 1;
8727         pci_save_state(pdev);
8728         pci_disable_device(pdev);
8729
8730         return 0;
8731
8732  out_free_geos:
8733         iwl4965_free_geos(priv);
8734  out_free_channel_map:
8735         iwl4965_free_channel_map(priv);
8736  out_remove_sysfs:
8737         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8738
8739  out_release_irq:
8740         destroy_workqueue(priv->workqueue);
8741         priv->workqueue = NULL;
8742         iwl4965_unset_hw_setting(priv);
8743
8744  out_iounmap:
8745         pci_iounmap(pdev, priv->hw_base);
8746  out_pci_release_regions:
8747         pci_release_regions(pdev);
8748  out_pci_disable_device:
8749         pci_disable_device(pdev);
8750         pci_set_drvdata(pdev, NULL);
8751  out_ieee80211_free_hw:
8752         ieee80211_free_hw(priv->hw);
8753  out:
8754         return err;
8755 }
8756
8757 static void iwl4965_pci_remove(struct pci_dev *pdev)
8758 {
8759         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
8760         struct list_head *p, *q;
8761         int i;
8762
8763         if (!priv)
8764                 return;
8765
8766         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8767
8768         set_bit(STATUS_EXIT_PENDING, &priv->status);
8769
8770         iwl4965_down(priv);
8771
8772         /* Free MAC hash list for ADHOC */
8773         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8774                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8775                         list_del(p);
8776                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
8777                 }
8778         }
8779
8780         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8781
8782         iwl4965_dealloc_ucode_pci(priv);
8783
8784         if (priv->rxq.bd)
8785                 iwl4965_rx_queue_free(priv, &priv->rxq);
8786         iwl4965_hw_txq_ctx_free(priv);
8787
8788         iwl4965_unset_hw_setting(priv);
8789         iwl4965_clear_stations_table(priv);
8790
8791         if (priv->mac80211_registered) {
8792                 ieee80211_unregister_hw(priv->hw);
8793                 iwl4965_rate_control_unregister(priv->hw);
8794         }
8795
8796         /*netif_stop_queue(dev); */
8797         flush_workqueue(priv->workqueue);
8798
8799         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
8800          * priv->workqueue... so we can't take down the workqueue
8801          * until now... */
8802         destroy_workqueue(priv->workqueue);
8803         priv->workqueue = NULL;
8804
8805         pci_iounmap(pdev, priv->hw_base);
8806         pci_release_regions(pdev);
8807         pci_disable_device(pdev);
8808         pci_set_drvdata(pdev, NULL);
8809
8810         iwl4965_free_channel_map(priv);
8811         iwl4965_free_geos(priv);
8812
8813         if (priv->ibss_beacon)
8814                 dev_kfree_skb(priv->ibss_beacon);
8815
8816         ieee80211_free_hw(priv->hw);
8817 }
8818
8819 #ifdef CONFIG_PM
8820
8821 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8822 {
8823         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
8824
8825         if (priv->is_open) {
8826                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8827                 iwl4965_mac_stop(priv->hw);
8828                 priv->is_open = 1;
8829         }
8830
8831         pci_set_power_state(pdev, PCI_D3hot);
8832
8833         return 0;
8834 }
8835
8836 static int iwl4965_pci_resume(struct pci_dev *pdev)
8837 {
8838         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
8839
8840         pci_set_power_state(pdev, PCI_D0);
8841
8842         if (priv->is_open)
8843                 iwl4965_mac_start(priv->hw);
8844
8845         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8846         return 0;
8847 }
8848
8849 #endif /* CONFIG_PM */
8850
8851 /*****************************************************************************
8852  *
8853  * driver and module entry point
8854  *
8855  *****************************************************************************/
8856
8857 static struct pci_driver iwl4965_driver = {
8858         .name = DRV_NAME,
8859         .id_table = iwl4965_hw_card_ids,
8860         .probe = iwl4965_pci_probe,
8861         .remove = __devexit_p(iwl4965_pci_remove),
8862 #ifdef CONFIG_PM
8863         .suspend = iwl4965_pci_suspend,
8864         .resume = iwl4965_pci_resume,
8865 #endif
8866 };
8867
8868 static int __init iwl4965_init(void)
8869 {
8870
8871         int ret;
8872         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8873         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8874         ret = pci_register_driver(&iwl4965_driver);
8875         if (ret) {
8876                 IWL_ERROR("Unable to initialize PCI module\n");
8877                 return ret;
8878         }
8879 #ifdef CONFIG_IWL4965_DEBUG
8880         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8881         if (ret) {
8882                 IWL_ERROR("Unable to create driver sysfs file\n");
8883                 pci_unregister_driver(&iwl4965_driver);
8884                 return ret;
8885         }
8886 #endif
8887
8888         return ret;
8889 }
8890
8891 static void __exit iwl4965_exit(void)
8892 {
8893 #ifdef CONFIG_IWL4965_DEBUG
8894         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8895 #endif
8896         pci_unregister_driver(&iwl4965_driver);
8897 }
8898
8899 module_param_named(antenna, iwl4965_param_antenna, int, 0444);
8900 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8901 module_param_named(disable, iwl4965_param_disable, int, 0444);
8902 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8903 module_param_named(hwcrypto, iwl4965_param_hwcrypto, int, 0444);
8904 MODULE_PARM_DESC(hwcrypto,
8905                  "using hardware crypto engine (default 0 [software])\n");
8906 module_param_named(debug, iwl4965_param_debug, int, 0444);
8907 MODULE_PARM_DESC(debug, "debug output mask");
8908 module_param_named(disable_hw_scan, iwl4965_param_disable_hw_scan, int, 0444);
8909 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8910
8911 module_param_named(queues_num, iwl4965_param_queues_num, int, 0444);
8912 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8913
8914 /* QoS */
8915 module_param_named(qos_enable, iwl4965_param_qos_enable, int, 0444);
8916 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8917 module_param_named(amsdu_size_8K, iwl4965_param_amsdu_size_8K, int, 0444);
8918 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
8919
8920 module_exit(iwl4965_exit);
8921 module_init(iwl4965_init);