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                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2431                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
2432                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2433                 break;
2434
2435         case ALG_TKIP:
2436 #if 0
2437                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2438
2439                 if (last_frag)
2440                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2441                                8);
2442                 else
2443                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2444 #endif
2445                 break;
2446
2447         case ALG_WEP:
2448                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2449                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2450
2451                 if (keyinfo->keylen == 13)
2452                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2453
2454                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2455
2456                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2457                              "with key %d\n", ctl->key_idx);
2458                 break;
2459
2460         default:
2461                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2462                 break;
2463         }
2464 }
2465
2466 /*
2467  * handle build REPLY_TX command notification.
2468  */
2469 static void iwl4965_build_tx_cmd_basic(struct iwl4965_priv *priv,
2470                                   struct iwl4965_cmd *cmd,
2471                                   struct ieee80211_tx_control *ctrl,
2472                                   struct ieee80211_hdr *hdr,
2473                                   int is_unicast, u8 std_id)
2474 {
2475         __le16 *qc;
2476         u16 fc = le16_to_cpu(hdr->frame_control);
2477         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2478
2479         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2480         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2481                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2482                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2483                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2484                 if (ieee80211_is_probe_response(fc) &&
2485                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2486                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2487         } else {
2488                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2489                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2490         }
2491
2492         if (ieee80211_is_back_request(fc))
2493                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2494
2495
2496         cmd->cmd.tx.sta_id = std_id;
2497         if (ieee80211_get_morefrag(hdr))
2498                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2499
2500         qc = ieee80211_get_qos_ctrl(hdr);
2501         if (qc) {
2502                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2503                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2504         } else
2505                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2506
2507         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2508                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2509                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2510         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2511                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2512                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2513         }
2514
2515         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2516                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2517
2518         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2519         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2520                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2521                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2522                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2523                 else
2524                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2525         } else
2526                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2527
2528         cmd->cmd.tx.driver_txop = 0;
2529         cmd->cmd.tx.tx_flags = tx_flags;
2530         cmd->cmd.tx.next_frame_len = 0;
2531 }
2532
2533 /**
2534  * iwl4965_get_sta_id - Find station's index within station table
2535  *
2536  * If new IBSS station, create new entry in station table
2537  */
2538 static int iwl4965_get_sta_id(struct iwl4965_priv *priv,
2539                                 struct ieee80211_hdr *hdr)
2540 {
2541         int sta_id;
2542         u16 fc = le16_to_cpu(hdr->frame_control);
2543         DECLARE_MAC_BUF(mac);
2544
2545         /* If this frame is broadcast or management, use broadcast station id */
2546         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2547             is_multicast_ether_addr(hdr->addr1))
2548                 return priv->hw_setting.bcast_sta_id;
2549
2550         switch (priv->iw_mode) {
2551
2552         /* If we are a client station in a BSS network, use the special
2553          * AP station entry (that's the only station we communicate with) */
2554         case IEEE80211_IF_TYPE_STA:
2555                 return IWL_AP_ID;
2556
2557         /* If we are an AP, then find the station, or use BCAST */
2558         case IEEE80211_IF_TYPE_AP:
2559                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2560                 if (sta_id != IWL_INVALID_STATION)
2561                         return sta_id;
2562                 return priv->hw_setting.bcast_sta_id;
2563
2564         /* If this frame is going out to an IBSS network, find the station,
2565          * or create a new station table entry */
2566         case IEEE80211_IF_TYPE_IBSS:
2567                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2568                 if (sta_id != IWL_INVALID_STATION)
2569                         return sta_id;
2570
2571                 /* Create new station table entry */
2572                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2573                                                    0, CMD_ASYNC, NULL);
2574
2575                 if (sta_id != IWL_INVALID_STATION)
2576                         return sta_id;
2577
2578                 IWL_DEBUG_DROP("Station %s not in station map. "
2579                                "Defaulting to broadcast...\n",
2580                                print_mac(mac, hdr->addr1));
2581                 iwl4965_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2582                 return priv->hw_setting.bcast_sta_id;
2583
2584         default:
2585                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2586                 return priv->hw_setting.bcast_sta_id;
2587         }
2588 }
2589
2590 /*
2591  * start REPLY_TX command process
2592  */
2593 static int iwl4965_tx_skb(struct iwl4965_priv *priv,
2594                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2595 {
2596         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2597         struct iwl4965_tfd_frame *tfd;
2598         u32 *control_flags;
2599         int txq_id = ctl->queue;
2600         struct iwl4965_tx_queue *txq = NULL;
2601         struct iwl4965_queue *q = NULL;
2602         dma_addr_t phys_addr;
2603         dma_addr_t txcmd_phys;
2604         dma_addr_t scratch_phys;
2605         struct iwl4965_cmd *out_cmd = NULL;
2606         u16 len, idx, len_org;
2607         u8 id, hdr_len, unicast;
2608         u8 sta_id;
2609         u16 seq_number = 0;
2610         u16 fc;
2611         __le16 *qc;
2612         u8 wait_write_ptr = 0;
2613         unsigned long flags;
2614         int rc;
2615
2616         spin_lock_irqsave(&priv->lock, flags);
2617         if (iwl4965_is_rfkill(priv)) {
2618                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2619                 goto drop_unlock;
2620         }
2621
2622         if (!priv->vif) {
2623                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2624                 goto drop_unlock;
2625         }
2626
2627         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2628                 IWL_ERROR("ERROR: No TX rate available.\n");
2629                 goto drop_unlock;
2630         }
2631
2632         unicast = !is_multicast_ether_addr(hdr->addr1);
2633         id = 0;
2634
2635         fc = le16_to_cpu(hdr->frame_control);
2636
2637 #ifdef CONFIG_IWL4965_DEBUG
2638         if (ieee80211_is_auth(fc))
2639                 IWL_DEBUG_TX("Sending AUTH frame\n");
2640         else if (ieee80211_is_assoc_request(fc))
2641                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2642         else if (ieee80211_is_reassoc_request(fc))
2643                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2644 #endif
2645
2646         /* drop all data frame if we are not associated */
2647         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2648            (!iwl4965_is_associated(priv) ||
2649             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2650             !priv->assoc_station_added)) {
2651                 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2652                 goto drop_unlock;
2653         }
2654
2655         spin_unlock_irqrestore(&priv->lock, flags);
2656
2657         hdr_len = ieee80211_get_hdrlen(fc);
2658
2659         /* Find (or create) index into station table for destination station */
2660         sta_id = iwl4965_get_sta_id(priv, hdr);
2661         if (sta_id == IWL_INVALID_STATION) {
2662                 DECLARE_MAC_BUF(mac);
2663
2664                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2665                                print_mac(mac, hdr->addr1));
2666                 goto drop;
2667         }
2668
2669         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2670
2671         qc = ieee80211_get_qos_ctrl(hdr);
2672         if (qc) {
2673                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2674                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2675                                 IEEE80211_SCTL_SEQ;
2676                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2677                         (hdr->seq_ctrl &
2678                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2679                 seq_number += 0x10;
2680 #ifdef CONFIG_IWL4965_HT
2681                 /* aggregation is on for this <sta,tid> */
2682                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2683                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2684                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2685 #endif /* CONFIG_IWL4965_HT */
2686         }
2687
2688         /* Descriptor for chosen Tx queue */
2689         txq = &priv->txq[txq_id];
2690         q = &txq->q;
2691
2692         spin_lock_irqsave(&priv->lock, flags);
2693
2694         /* Set up first empty TFD within this queue's circular TFD buffer */
2695         tfd = &txq->bd[q->write_ptr];
2696         memset(tfd, 0, sizeof(*tfd));
2697         control_flags = (u32 *) tfd;
2698         idx = get_cmd_index(q, q->write_ptr, 0);
2699
2700         /* Set up driver data for this TFD */
2701         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2702         txq->txb[q->write_ptr].skb[0] = skb;
2703         memcpy(&(txq->txb[q->write_ptr].status.control),
2704                ctl, sizeof(struct ieee80211_tx_control));
2705
2706         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2707         out_cmd = &txq->cmd[idx];
2708         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2709         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2710
2711         /*
2712          * Set up the Tx-command (not MAC!) header.
2713          * Store the chosen Tx queue and TFD index within the sequence field;
2714          * after Tx, uCode's Tx response will return this value so driver can
2715          * locate the frame within the tx queue and do post-tx processing.
2716          */
2717         out_cmd->hdr.cmd = REPLY_TX;
2718         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2719                                 INDEX_TO_SEQ(q->write_ptr)));
2720
2721         /* Copy MAC header from skb into command buffer */
2722         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2723
2724         /*
2725          * Use the first empty entry in this queue's command buffer array
2726          * to contain the Tx command and MAC header concatenated together
2727          * (payload data will be in another buffer).
2728          * Size of this varies, due to varying MAC header length.
2729          * If end is not dword aligned, we'll have 2 extra bytes at the end
2730          * of the MAC header (device reads on dword boundaries).
2731          * We'll tell device about this padding later.
2732          */
2733         len = priv->hw_setting.tx_cmd_len +
2734                 sizeof(struct iwl4965_cmd_header) + hdr_len;
2735
2736         len_org = len;
2737         len = (len + 3) & ~3;
2738
2739         if (len_org != len)
2740                 len_org = 1;
2741         else
2742                 len_org = 0;
2743
2744         /* Physical address of this Tx command's header (not MAC header!),
2745          * within command buffer array. */
2746         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl4965_cmd) * idx +
2747                      offsetof(struct iwl4965_cmd, hdr);
2748
2749         /* Add buffer containing Tx command and MAC(!) header to TFD's
2750          * first entry */
2751         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2752
2753         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2754                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2755
2756         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2757          * if any (802.11 null frames have no payload). */
2758         len = skb->len - hdr_len;
2759         if (len) {
2760                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2761                                            len, PCI_DMA_TODEVICE);
2762                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2763         }
2764
2765         /* Tell 4965 about any 2-byte padding after MAC header */
2766         if (len_org)
2767                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2768
2769         /* Total # bytes to be transmitted */
2770         len = (u16)skb->len;
2771         out_cmd->cmd.tx.len = cpu_to_le16(len);
2772
2773         /* TODO need this for burst mode later on */
2774         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2775
2776         /* set is_hcca to 0; it probably will never be implemented */
2777         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2778
2779         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
2780                 offsetof(struct iwl4965_tx_cmd, scratch);
2781         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2782         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2783
2784         if (!ieee80211_get_morefrag(hdr)) {
2785                 txq->need_update = 1;
2786                 if (qc) {
2787                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2788                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2789                 }
2790         } else {
2791                 wait_write_ptr = 1;
2792                 txq->need_update = 0;
2793         }
2794
2795         iwl4965_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2796                            sizeof(out_cmd->cmd.tx));
2797
2798         iwl4965_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2799                            ieee80211_get_hdrlen(fc));
2800
2801         /* Set up entry for this TFD in Tx byte-count array */
2802         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2803
2804         /* Tell device the write index *just past* this latest filled TFD */
2805         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2806         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2807         spin_unlock_irqrestore(&priv->lock, flags);
2808
2809         if (rc)
2810                 return rc;
2811
2812         if ((iwl4965_queue_space(q) < q->high_mark)
2813             && priv->mac80211_registered) {
2814                 if (wait_write_ptr) {
2815                         spin_lock_irqsave(&priv->lock, flags);
2816                         txq->need_update = 1;
2817                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2818                         spin_unlock_irqrestore(&priv->lock, flags);
2819                 }
2820
2821                 ieee80211_stop_queue(priv->hw, ctl->queue);
2822         }
2823
2824         return 0;
2825
2826 drop_unlock:
2827         spin_unlock_irqrestore(&priv->lock, flags);
2828 drop:
2829         return -1;
2830 }
2831
2832 static void iwl4965_set_rate(struct iwl4965_priv *priv)
2833 {
2834         const struct ieee80211_supported_band *hw = NULL;
2835         struct ieee80211_rate *rate;
2836         int i;
2837
2838         hw = iwl4965_get_hw_mode(priv, priv->band);
2839         if (!hw) {
2840                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2841                 return;
2842         }
2843
2844         priv->active_rate = 0;
2845         priv->active_rate_basic = 0;
2846
2847         for (i = 0; i < hw->n_bitrates; i++) {
2848                 rate = &(hw->bitrates[i]);
2849                 if (rate->hw_value < IWL_RATE_COUNT)
2850                         priv->active_rate |= (1 << rate->hw_value);
2851         }
2852
2853         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2854                        priv->active_rate, priv->active_rate_basic);
2855
2856         /*
2857          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2858          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2859          * OFDM
2860          */
2861         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2862                 priv->staging_rxon.cck_basic_rates =
2863                     ((priv->active_rate_basic &
2864                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2865         else
2866                 priv->staging_rxon.cck_basic_rates =
2867                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2868
2869         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2870                 priv->staging_rxon.ofdm_basic_rates =
2871                     ((priv->active_rate_basic &
2872                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2873                       IWL_FIRST_OFDM_RATE) & 0xFF;
2874         else
2875                 priv->staging_rxon.ofdm_basic_rates =
2876                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2877 }
2878
2879 static void iwl4965_radio_kill_sw(struct iwl4965_priv *priv, int disable_radio)
2880 {
2881         unsigned long flags;
2882
2883         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2884                 return;
2885
2886         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2887                           disable_radio ? "OFF" : "ON");
2888
2889         if (disable_radio) {
2890                 iwl4965_scan_cancel(priv);
2891                 /* FIXME: This is a workaround for AP */
2892                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2893                         spin_lock_irqsave(&priv->lock, flags);
2894                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
2895                                     CSR_UCODE_SW_BIT_RFKILL);
2896                         spin_unlock_irqrestore(&priv->lock, flags);
2897                         iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2898                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2899                 }
2900                 return;
2901         }
2902
2903         spin_lock_irqsave(&priv->lock, flags);
2904         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2905
2906         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2907         spin_unlock_irqrestore(&priv->lock, flags);
2908
2909         /* wake up ucode */
2910         msleep(10);
2911
2912         spin_lock_irqsave(&priv->lock, flags);
2913         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
2914         if (!iwl4965_grab_nic_access(priv))
2915                 iwl4965_release_nic_access(priv);
2916         spin_unlock_irqrestore(&priv->lock, flags);
2917
2918         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2919                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2920                                   "disabled by HW switch\n");
2921                 return;
2922         }
2923
2924         queue_work(priv->workqueue, &priv->restart);
2925         return;
2926 }
2927
2928 void iwl4965_set_decrypted_flag(struct iwl4965_priv *priv, struct sk_buff *skb,
2929                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2930 {
2931         u16 fc =
2932             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2933
2934         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2935                 return;
2936
2937         if (!(fc & IEEE80211_FCTL_PROTECTED))
2938                 return;
2939
2940         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2941         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2942         case RX_RES_STATUS_SEC_TYPE_TKIP:
2943                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2944                     RX_RES_STATUS_BAD_ICV_MIC)
2945                         stats->flag |= RX_FLAG_MMIC_ERROR;
2946         case RX_RES_STATUS_SEC_TYPE_WEP:
2947         case RX_RES_STATUS_SEC_TYPE_CCMP:
2948                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2949                     RX_RES_STATUS_DECRYPT_OK) {
2950                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2951                         stats->flag |= RX_FLAG_DECRYPTED;
2952                 }
2953                 break;
2954
2955         default:
2956                 break;
2957         }
2958 }
2959
2960
2961 #define IWL_PACKET_RETRY_TIME HZ
2962
2963 int iwl4965_is_duplicate_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
2964 {
2965         u16 sc = le16_to_cpu(header->seq_ctrl);
2966         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2967         u16 frag = sc & IEEE80211_SCTL_FRAG;
2968         u16 *last_seq, *last_frag;
2969         unsigned long *last_time;
2970
2971         switch (priv->iw_mode) {
2972         case IEEE80211_IF_TYPE_IBSS:{
2973                 struct list_head *p;
2974                 struct iwl4965_ibss_seq *entry = NULL;
2975                 u8 *mac = header->addr2;
2976                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2977
2978                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2979                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2980                         if (!compare_ether_addr(entry->mac, mac))
2981                                 break;
2982                 }
2983                 if (p == &priv->ibss_mac_hash[index]) {
2984                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2985                         if (!entry) {
2986                                 IWL_ERROR("Cannot malloc new mac entry\n");
2987                                 return 0;
2988                         }
2989                         memcpy(entry->mac, mac, ETH_ALEN);
2990                         entry->seq_num = seq;
2991                         entry->frag_num = frag;
2992                         entry->packet_time = jiffies;
2993                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2994                         return 0;
2995                 }
2996                 last_seq = &entry->seq_num;
2997                 last_frag = &entry->frag_num;
2998                 last_time = &entry->packet_time;
2999                 break;
3000         }
3001         case IEEE80211_IF_TYPE_STA:
3002                 last_seq = &priv->last_seq_num;
3003                 last_frag = &priv->last_frag_num;
3004                 last_time = &priv->last_packet_time;
3005                 break;
3006         default:
3007                 return 0;
3008         }
3009         if ((*last_seq == seq) &&
3010             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3011                 if (*last_frag == frag)
3012                         goto drop;
3013                 if (*last_frag + 1 != frag)
3014                         /* out-of-order fragment */
3015                         goto drop;
3016         } else
3017                 *last_seq = seq;
3018
3019         *last_frag = frag;
3020         *last_time = jiffies;
3021         return 0;
3022
3023  drop:
3024         return 1;
3025 }
3026
3027 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3028
3029 #include "iwl-spectrum.h"
3030
3031 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3032 #define BEACON_TIME_MASK_HIGH   0xFF000000
3033 #define TIME_UNIT               1024
3034
3035 /*
3036  * extended beacon time format
3037  * time in usec will be changed into a 32-bit value in 8:24 format
3038  * the high 1 byte is the beacon counts
3039  * the lower 3 bytes is the time in usec within one beacon interval
3040  */
3041
3042 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
3043 {
3044         u32 quot;
3045         u32 rem;
3046         u32 interval = beacon_interval * 1024;
3047
3048         if (!interval || !usec)
3049                 return 0;
3050
3051         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3052         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3053
3054         return (quot << 24) + rem;
3055 }
3056
3057 /* base is usually what we get from ucode with each received frame,
3058  * the same as HW timer counter counting down
3059  */
3060
3061 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3062 {
3063         u32 base_low = base & BEACON_TIME_MASK_LOW;
3064         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3065         u32 interval = beacon_interval * TIME_UNIT;
3066         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3067             (addon & BEACON_TIME_MASK_HIGH);
3068
3069         if (base_low > addon_low)
3070                 res += base_low - addon_low;
3071         else if (base_low < addon_low) {
3072                 res += interval + base_low - addon_low;
3073                 res += (1 << 24);
3074         } else
3075                 res += (1 << 24);
3076
3077         return cpu_to_le32(res);
3078 }
3079
3080 static int iwl4965_get_measurement(struct iwl4965_priv *priv,
3081                                struct ieee80211_measurement_params *params,
3082                                u8 type)
3083 {
3084         struct iwl4965_spectrum_cmd spectrum;
3085         struct iwl4965_rx_packet *res;
3086         struct iwl4965_host_cmd cmd = {
3087                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3088                 .data = (void *)&spectrum,
3089                 .meta.flags = CMD_WANT_SKB,
3090         };
3091         u32 add_time = le64_to_cpu(params->start_time);
3092         int rc;
3093         int spectrum_resp_status;
3094         int duration = le16_to_cpu(params->duration);
3095
3096         if (iwl4965_is_associated(priv))
3097                 add_time =
3098                     iwl4965_usecs_to_beacons(
3099                         le64_to_cpu(params->start_time) - priv->last_tsf,
3100                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3101
3102         memset(&spectrum, 0, sizeof(spectrum));
3103
3104         spectrum.channel_count = cpu_to_le16(1);
3105         spectrum.flags =
3106             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3107         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3108         cmd.len = sizeof(spectrum);
3109         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3110
3111         if (iwl4965_is_associated(priv))
3112                 spectrum.start_time =
3113                     iwl4965_add_beacon_time(priv->last_beacon_time,
3114                                 add_time,
3115                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3116         else
3117                 spectrum.start_time = 0;
3118
3119         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3120         spectrum.channels[0].channel = params->channel;
3121         spectrum.channels[0].type = type;
3122         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3123                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3124                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3125
3126         rc = iwl4965_send_cmd_sync(priv, &cmd);
3127         if (rc)
3128                 return rc;
3129
3130         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
3131         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3132                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3133                 rc = -EIO;
3134         }
3135
3136         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3137         switch (spectrum_resp_status) {
3138         case 0:         /* Command will be handled */
3139                 if (res->u.spectrum.id != 0xff) {
3140                         IWL_DEBUG_INFO
3141                             ("Replaced existing measurement: %d\n",
3142                              res->u.spectrum.id);
3143                         priv->measurement_status &= ~MEASUREMENT_READY;
3144                 }
3145                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3146                 rc = 0;
3147                 break;
3148
3149         case 1:         /* Command will not be handled */
3150                 rc = -EAGAIN;
3151                 break;
3152         }
3153
3154         dev_kfree_skb_any(cmd.meta.u.skb);
3155
3156         return rc;
3157 }
3158 #endif
3159
3160 static void iwl4965_txstatus_to_ieee(struct iwl4965_priv *priv,
3161                                  struct iwl4965_tx_info *tx_sta)
3162 {
3163
3164         tx_sta->status.ack_signal = 0;
3165         tx_sta->status.excessive_retries = 0;
3166         tx_sta->status.queue_length = 0;
3167         tx_sta->status.queue_number = 0;
3168
3169         if (in_interrupt())
3170                 ieee80211_tx_status_irqsafe(priv->hw,
3171                                             tx_sta->skb[0], &(tx_sta->status));
3172         else
3173                 ieee80211_tx_status(priv->hw,
3174                                     tx_sta->skb[0], &(tx_sta->status));
3175
3176         tx_sta->skb[0] = NULL;
3177 }
3178
3179 /**
3180  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3181  *
3182  * When FW advances 'R' index, all entries between old and new 'R' index
3183  * need to be reclaimed. As result, some free space forms.  If there is
3184  * enough free space (> low mark), wake the stack that feeds us.
3185  */
3186 int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index)
3187 {
3188         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3189         struct iwl4965_queue *q = &txq->q;
3190         int nfreed = 0;
3191
3192         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3193                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3194                           "is out of range [0-%d] %d %d.\n", txq_id,
3195                           index, q->n_bd, q->write_ptr, q->read_ptr);
3196                 return 0;
3197         }
3198
3199         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3200                 q->read_ptr != index;
3201                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3202                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3203                         iwl4965_txstatus_to_ieee(priv,
3204                                         &(txq->txb[txq->q.read_ptr]));
3205                         iwl4965_hw_txq_free_tfd(priv, txq);
3206                 } else if (nfreed > 1) {
3207                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3208                                         q->write_ptr, q->read_ptr);
3209                         queue_work(priv->workqueue, &priv->restart);
3210                 }
3211                 nfreed++;
3212         }
3213
3214 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3215                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3216                         priv->mac80211_registered)
3217                 ieee80211_wake_queue(priv->hw, txq_id); */
3218
3219
3220         return nfreed;
3221 }
3222
3223 static int iwl4965_is_tx_success(u32 status)
3224 {
3225         status &= TX_STATUS_MSK;
3226         return (status == TX_STATUS_SUCCESS)
3227             || (status == TX_STATUS_DIRECT_DONE);
3228 }
3229
3230 /******************************************************************************
3231  *
3232  * Generic RX handler implementations
3233  *
3234  ******************************************************************************/
3235 #ifdef CONFIG_IWL4965_HT
3236
3237 static inline int iwl4965_get_ra_sta_id(struct iwl4965_priv *priv,
3238                                     struct ieee80211_hdr *hdr)
3239 {
3240         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3241                 return IWL_AP_ID;
3242         else {
3243                 u8 *da = ieee80211_get_DA(hdr);
3244                 return iwl4965_hw_find_station(priv, da);
3245         }
3246 }
3247
3248 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
3249         struct iwl4965_priv *priv, int txq_id, int idx)
3250 {
3251         if (priv->txq[txq_id].txb[idx].skb[0])
3252                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3253                                 txb[idx].skb[0]->data;
3254         return NULL;
3255 }
3256
3257 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3258 {
3259         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3260                                 tx_resp->frame_count);
3261         return le32_to_cpu(*scd_ssn) & MAX_SN;
3262
3263 }
3264
3265 /**
3266  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3267  */
3268 static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
3269                                       struct iwl4965_ht_agg *agg,
3270                                       struct iwl4965_tx_resp_agg *tx_resp,
3271                                       u16 start_idx)
3272 {
3273         u16 status;
3274         struct agg_tx_status *frame_status = &tx_resp->status;
3275         struct ieee80211_tx_status *tx_status = NULL;
3276         struct ieee80211_hdr *hdr = NULL;
3277         int i, sh;
3278         int txq_id, idx;
3279         u16 seq;
3280
3281         if (agg->wait_for_ba)
3282                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3283
3284         agg->frame_count = tx_resp->frame_count;
3285         agg->start_idx = start_idx;
3286         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3287         agg->bitmap = 0;
3288
3289         /* # frames attempted by Tx command */
3290         if (agg->frame_count == 1) {
3291                 /* Only one frame was attempted; no block-ack will arrive */
3292                 status = le16_to_cpu(frame_status[0].status);
3293                 seq  = le16_to_cpu(frame_status[0].sequence);
3294                 idx = SEQ_TO_INDEX(seq);
3295                 txq_id = SEQ_TO_QUEUE(seq);
3296
3297                 /* FIXME: code repetition */
3298                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3299                                    agg->frame_count, agg->start_idx, idx);
3300
3301                 tx_status = &(priv->txq[txq_id].txb[idx].status);
3302                 tx_status->retry_count = tx_resp->failure_frame;
3303                 tx_status->queue_number = status & 0xff;
3304                 tx_status->queue_length = tx_resp->failure_rts;
3305                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
3306                 tx_status->flags = iwl4965_is_tx_success(status)?
3307                         IEEE80211_TX_STATUS_ACK : 0;
3308                 iwl4965_hwrate_to_tx_control(priv,
3309                                              le32_to_cpu(tx_resp->rate_n_flags),
3310                                              &tx_status->control);
3311                 /* FIXME: code repetition end */
3312
3313                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3314                                     status & 0xff, tx_resp->failure_frame);
3315                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3316                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3317
3318                 agg->wait_for_ba = 0;
3319         } else {
3320                 /* Two or more frames were attempted; expect block-ack */
3321                 u64 bitmap = 0;
3322                 int start = agg->start_idx;
3323
3324                 /* Construct bit-map of pending frames within Tx window */
3325                 for (i = 0; i < agg->frame_count; i++) {
3326                         u16 sc;
3327                         status = le16_to_cpu(frame_status[i].status);
3328                         seq  = le16_to_cpu(frame_status[i].sequence);
3329                         idx = SEQ_TO_INDEX(seq);
3330                         txq_id = SEQ_TO_QUEUE(seq);
3331
3332                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3333                                       AGG_TX_STATE_ABORT_MSK))
3334                                 continue;
3335
3336                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3337                                            agg->frame_count, txq_id, idx);
3338
3339                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3340
3341                         sc = le16_to_cpu(hdr->seq_ctrl);
3342                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3343                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3344                                           " idx=%d, seq_idx=%d, seq=%d\n",
3345                                           idx, SEQ_TO_SN(sc),
3346                                           hdr->seq_ctrl);
3347                                 return -1;
3348                         }
3349
3350                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3351                                            i, idx, SEQ_TO_SN(sc));
3352
3353                         sh = idx - start;
3354                         if (sh > 64) {
3355                                 sh = (start - idx) + 0xff;
3356                                 bitmap = bitmap << sh;
3357                                 sh = 0;
3358                                 start = idx;
3359                         } else if (sh < -64)
3360                                 sh  = 0xff - (start - idx);
3361                         else if (sh < 0) {
3362                                 sh = start - idx;
3363                                 start = idx;
3364                                 bitmap = bitmap << sh;
3365                                 sh = 0;
3366                         }
3367                         bitmap |= (1 << sh);
3368                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3369                                            start, (u32)(bitmap & 0xFFFFFFFF));
3370                 }
3371
3372                 agg->bitmap = bitmap;
3373                 agg->start_idx = start;
3374                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3375                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3376                                    agg->frame_count, agg->start_idx,
3377                                    agg->bitmap);
3378
3379                 if (bitmap)
3380                         agg->wait_for_ba = 1;
3381         }
3382         return 0;
3383 }
3384 #endif
3385
3386 /**
3387  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3388  */
3389 static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
3390                             struct iwl4965_rx_mem_buffer *rxb)
3391 {
3392         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3393         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3394         int txq_id = SEQ_TO_QUEUE(sequence);
3395         int index = SEQ_TO_INDEX(sequence);
3396         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3397         struct ieee80211_tx_status *tx_status;
3398         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3399         u32  status = le32_to_cpu(tx_resp->status);
3400 #ifdef CONFIG_IWL4965_HT
3401         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3402         struct ieee80211_hdr *hdr;
3403         __le16 *qc;
3404 #endif
3405
3406         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3407                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3408                           "is out of range [0-%d] %d %d\n", txq_id,
3409                           index, txq->q.n_bd, txq->q.write_ptr,
3410                           txq->q.read_ptr);
3411                 return;
3412         }
3413
3414 #ifdef CONFIG_IWL4965_HT
3415         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3416         qc = ieee80211_get_qos_ctrl(hdr);
3417
3418         if (qc)
3419                 tid = le16_to_cpu(*qc) & 0xf;
3420
3421         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3422         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3423                 IWL_ERROR("Station not known\n");
3424                 return;
3425         }
3426
3427         if (txq->sched_retry) {
3428                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3429                 struct iwl4965_ht_agg *agg = NULL;
3430
3431                 if (!qc)
3432                         return;
3433
3434                 agg = &priv->stations[sta_id].tid[tid].agg;
3435
3436                 iwl4965_tx_status_reply_tx(priv, agg,
3437                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3438
3439                 if ((tx_resp->frame_count == 1) &&
3440                     !iwl4965_is_tx_success(status)) {
3441                         /* TODO: send BAR */
3442                 }
3443
3444                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3445                         int freed;
3446                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3447                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3448                                            "%d index %d\n", scd_ssn , index);
3449                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3450                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3451
3452                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3453                             txq_id >= 0 && priv->mac80211_registered &&
3454                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3455                                 ieee80211_wake_queue(priv->hw, txq_id);
3456
3457                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3458                 }
3459         } else {
3460 #endif /* CONFIG_IWL4965_HT */
3461         tx_status = &(txq->txb[txq->q.read_ptr].status);
3462
3463         tx_status->retry_count = tx_resp->failure_frame;
3464         tx_status->queue_number = status;
3465         tx_status->queue_length = tx_resp->bt_kill_count;
3466         tx_status->queue_length |= tx_resp->failure_rts;
3467         tx_status->flags =
3468             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3469         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3470                                      &tx_status->control);
3471
3472         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3473                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3474                      status, le32_to_cpu(tx_resp->rate_n_flags),
3475                      tx_resp->failure_frame);
3476
3477         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3478         if (index != -1) {
3479                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3480 #ifdef CONFIG_IWL4965_HT
3481                 if (tid != MAX_TID_COUNT)
3482                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3483                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3484                         (txq_id >= 0) &&
3485                         priv->mac80211_registered)
3486                         ieee80211_wake_queue(priv->hw, txq_id);
3487                 if (tid != MAX_TID_COUNT)
3488                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3489 #endif
3490         }
3491 #ifdef CONFIG_IWL4965_HT
3492         }
3493 #endif /* CONFIG_IWL4965_HT */
3494
3495         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3496                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3497 }
3498
3499
3500 static void iwl4965_rx_reply_alive(struct iwl4965_priv *priv,
3501                                struct iwl4965_rx_mem_buffer *rxb)
3502 {
3503         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3504         struct iwl4965_alive_resp *palive;
3505         struct delayed_work *pwork;
3506
3507         palive = &pkt->u.alive_frame;
3508
3509         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3510                        "0x%01X 0x%01X\n",
3511                        palive->is_valid, palive->ver_type,
3512                        palive->ver_subtype);
3513
3514         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3515                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3516                 memcpy(&priv->card_alive_init,
3517                        &pkt->u.alive_frame,
3518                        sizeof(struct iwl4965_init_alive_resp));
3519                 pwork = &priv->init_alive_start;
3520         } else {
3521                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3522                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3523                        sizeof(struct iwl4965_alive_resp));
3524                 pwork = &priv->alive_start;
3525         }
3526
3527         /* We delay the ALIVE response by 5ms to
3528          * give the HW RF Kill time to activate... */
3529         if (palive->is_valid == UCODE_VALID_OK)
3530                 queue_delayed_work(priv->workqueue, pwork,
3531                                    msecs_to_jiffies(5));
3532         else
3533                 IWL_WARNING("uCode did not respond OK.\n");
3534 }
3535
3536 static void iwl4965_rx_reply_add_sta(struct iwl4965_priv *priv,
3537                                  struct iwl4965_rx_mem_buffer *rxb)
3538 {
3539         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3540
3541         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3542         return;
3543 }
3544
3545 static void iwl4965_rx_reply_error(struct iwl4965_priv *priv,
3546                                struct iwl4965_rx_mem_buffer *rxb)
3547 {
3548         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3549
3550         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3551                 "seq 0x%04X ser 0x%08X\n",
3552                 le32_to_cpu(pkt->u.err_resp.error_type),
3553                 get_cmd_string(pkt->u.err_resp.cmd_id),
3554                 pkt->u.err_resp.cmd_id,
3555                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3556                 le32_to_cpu(pkt->u.err_resp.error_info));
3557 }
3558
3559 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3560
3561 static void iwl4965_rx_csa(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3562 {
3563         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3564         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3565         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3566         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3567                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3568         rxon->channel = csa->channel;
3569         priv->staging_rxon.channel = csa->channel;
3570 }
3571
3572 static void iwl4965_rx_spectrum_measure_notif(struct iwl4965_priv *priv,
3573                                           struct iwl4965_rx_mem_buffer *rxb)
3574 {
3575 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3576         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3577         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3578
3579         if (!report->state) {
3580                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3581                           "Spectrum Measure Notification: Start\n");
3582                 return;
3583         }
3584
3585         memcpy(&priv->measure_report, report, sizeof(*report));
3586         priv->measurement_status |= MEASUREMENT_READY;
3587 #endif
3588 }
3589
3590 static void iwl4965_rx_pm_sleep_notif(struct iwl4965_priv *priv,
3591                                   struct iwl4965_rx_mem_buffer *rxb)
3592 {
3593 #ifdef CONFIG_IWL4965_DEBUG
3594         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3595         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3596         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3597                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3598 #endif
3599 }
3600
3601 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl4965_priv *priv,
3602                                              struct iwl4965_rx_mem_buffer *rxb)
3603 {
3604         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3605         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3606                         "notification for %s:\n",
3607                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3608         iwl4965_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3609 }
3610
3611 static void iwl4965_bg_beacon_update(struct work_struct *work)
3612 {
3613         struct iwl4965_priv *priv =
3614                 container_of(work, struct iwl4965_priv, beacon_update);
3615         struct sk_buff *beacon;
3616
3617         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3618         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3619
3620         if (!beacon) {
3621                 IWL_ERROR("update beacon failed\n");
3622                 return;
3623         }
3624
3625         mutex_lock(&priv->mutex);
3626         /* new beacon skb is allocated every time; dispose previous.*/
3627         if (priv->ibss_beacon)
3628                 dev_kfree_skb(priv->ibss_beacon);
3629
3630         priv->ibss_beacon = beacon;
3631         mutex_unlock(&priv->mutex);
3632
3633         iwl4965_send_beacon_cmd(priv);
3634 }
3635
3636 static void iwl4965_rx_beacon_notif(struct iwl4965_priv *priv,
3637                                 struct iwl4965_rx_mem_buffer *rxb)
3638 {
3639 #ifdef CONFIG_IWL4965_DEBUG
3640         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3641         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3642         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3643
3644         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3645                 "tsf %d %d rate %d\n",
3646                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3647                 beacon->beacon_notify_hdr.failure_frame,
3648                 le32_to_cpu(beacon->ibss_mgr_status),
3649                 le32_to_cpu(beacon->high_tsf),
3650                 le32_to_cpu(beacon->low_tsf), rate);
3651 #endif
3652
3653         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3654             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3655                 queue_work(priv->workqueue, &priv->beacon_update);
3656 }
3657
3658 /* Service response to REPLY_SCAN_CMD (0x80) */
3659 static void iwl4965_rx_reply_scan(struct iwl4965_priv *priv,
3660                               struct iwl4965_rx_mem_buffer *rxb)
3661 {
3662 #ifdef CONFIG_IWL4965_DEBUG
3663         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3664         struct iwl4965_scanreq_notification *notif =
3665             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3666
3667         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3668 #endif
3669 }
3670
3671 /* Service SCAN_START_NOTIFICATION (0x82) */
3672 static void iwl4965_rx_scan_start_notif(struct iwl4965_priv *priv,
3673                                     struct iwl4965_rx_mem_buffer *rxb)
3674 {
3675         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3676         struct iwl4965_scanstart_notification *notif =
3677             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3678         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3679         IWL_DEBUG_SCAN("Scan start: "
3680                        "%d [802.11%s] "
3681                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3682                        notif->channel,
3683                        notif->band ? "bg" : "a",
3684                        notif->tsf_high,
3685                        notif->tsf_low, notif->status, notif->beacon_timer);
3686 }
3687
3688 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3689 static void iwl4965_rx_scan_results_notif(struct iwl4965_priv *priv,
3690                                       struct iwl4965_rx_mem_buffer *rxb)
3691 {
3692         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3693         struct iwl4965_scanresults_notification *notif =
3694             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3695
3696         IWL_DEBUG_SCAN("Scan ch.res: "
3697                        "%d [802.11%s] "
3698                        "(TSF: 0x%08X:%08X) - %d "
3699                        "elapsed=%lu usec (%dms since last)\n",
3700                        notif->channel,
3701                        notif->band ? "bg" : "a",
3702                        le32_to_cpu(notif->tsf_high),
3703                        le32_to_cpu(notif->tsf_low),
3704                        le32_to_cpu(notif->statistics[0]),
3705                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3706                        jiffies_to_msecs(elapsed_jiffies
3707                                         (priv->last_scan_jiffies, jiffies)));
3708
3709         priv->last_scan_jiffies = jiffies;
3710         priv->next_scan_jiffies = 0;
3711 }
3712
3713 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3714 static void iwl4965_rx_scan_complete_notif(struct iwl4965_priv *priv,
3715                                        struct iwl4965_rx_mem_buffer *rxb)
3716 {
3717         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3718         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3719
3720         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3721                        scan_notif->scanned_channels,
3722                        scan_notif->tsf_low,
3723                        scan_notif->tsf_high, scan_notif->status);
3724
3725         /* The HW is no longer scanning */
3726         clear_bit(STATUS_SCAN_HW, &priv->status);
3727
3728         /* The scan completion notification came in, so kill that timer... */
3729         cancel_delayed_work(&priv->scan_check);
3730
3731         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3732                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3733                        jiffies_to_msecs(elapsed_jiffies
3734                                         (priv->scan_pass_start, jiffies)));
3735
3736         /* Remove this scanned band from the list
3737          * of pending bands to scan */
3738         priv->scan_bands--;
3739
3740         /* If a request to abort was given, or the scan did not succeed
3741          * then we reset the scan state machine and terminate,
3742          * re-queuing another scan if one has been requested */
3743         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3744                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3745                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3746         } else {
3747                 /* If there are more bands on this scan pass reschedule */
3748                 if (priv->scan_bands > 0)
3749                         goto reschedule;
3750         }
3751
3752         priv->last_scan_jiffies = jiffies;
3753         priv->next_scan_jiffies = 0;
3754         IWL_DEBUG_INFO("Setting scan to off\n");
3755
3756         clear_bit(STATUS_SCANNING, &priv->status);
3757
3758         IWL_DEBUG_INFO("Scan took %dms\n",
3759                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3760
3761         queue_work(priv->workqueue, &priv->scan_completed);
3762
3763         return;
3764
3765 reschedule:
3766         priv->scan_pass_start = jiffies;
3767         queue_work(priv->workqueue, &priv->request_scan);
3768 }
3769
3770 /* Handle notification from uCode that card's power state is changing
3771  * due to software, hardware, or critical temperature RFKILL */
3772 static void iwl4965_rx_card_state_notif(struct iwl4965_priv *priv,
3773                                     struct iwl4965_rx_mem_buffer *rxb)
3774 {
3775         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3776         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3777         unsigned long status = priv->status;
3778
3779         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3780                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3781                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3782
3783         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3784                      RF_CARD_DISABLED)) {
3785
3786                 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3787                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3788
3789                 if (!iwl4965_grab_nic_access(priv)) {
3790                         iwl4965_write_direct32(
3791                                 priv, HBUS_TARG_MBX_C,
3792                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3793
3794                         iwl4965_release_nic_access(priv);
3795                 }
3796
3797                 if (!(flags & RXON_CARD_DISABLED)) {
3798                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3799                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3800                         if (!iwl4965_grab_nic_access(priv)) {
3801                                 iwl4965_write_direct32(
3802                                         priv, HBUS_TARG_MBX_C,
3803                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3804
3805                                 iwl4965_release_nic_access(priv);
3806                         }
3807                 }
3808
3809                 if (flags & RF_CARD_DISABLED) {
3810                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3811                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3812                         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3813                         if (!iwl4965_grab_nic_access(priv))
3814                                 iwl4965_release_nic_access(priv);
3815                 }
3816         }
3817
3818         if (flags & HW_CARD_DISABLED)
3819                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3820         else
3821                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3822
3823
3824         if (flags & SW_CARD_DISABLED)
3825                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3826         else
3827                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3828
3829         if (!(flags & RXON_CARD_DISABLED))
3830                 iwl4965_scan_cancel(priv);
3831
3832         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3833              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3834             (test_bit(STATUS_RF_KILL_SW, &status) !=
3835              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3836                 queue_work(priv->workqueue, &priv->rf_kill);
3837         else
3838                 wake_up_interruptible(&priv->wait_command_queue);
3839 }
3840
3841 /**
3842  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3843  *
3844  * Setup the RX handlers for each of the reply types sent from the uCode
3845  * to the host.
3846  *
3847  * This function chains into the hardware specific files for them to setup
3848  * any hardware specific handlers as well.
3849  */
3850 static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
3851 {
3852         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3853         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3854         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3855         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3856         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3857             iwl4965_rx_spectrum_measure_notif;
3858         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3859         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3860             iwl4965_rx_pm_debug_statistics_notif;
3861         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3862
3863         /*
3864          * The same handler is used for both the REPLY to a discrete
3865          * statistics request from the host as well as for the periodic
3866          * statistics notifications (after received beacons) from the uCode.
3867          */
3868         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3869         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3870
3871         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3872         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3873         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3874             iwl4965_rx_scan_results_notif;
3875         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3876             iwl4965_rx_scan_complete_notif;
3877         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3878         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3879
3880         /* Set up hardware specific Rx handlers */
3881         iwl4965_hw_rx_handler_setup(priv);
3882 }
3883
3884 /**
3885  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3886  * @rxb: Rx buffer to reclaim
3887  *
3888  * If an Rx buffer has an async callback associated with it the callback
3889  * will be executed.  The attached skb (if present) will only be freed
3890  * if the callback returns 1
3891  */
3892 static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
3893                                 struct iwl4965_rx_mem_buffer *rxb)
3894 {
3895         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3896         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3897         int txq_id = SEQ_TO_QUEUE(sequence);
3898         int index = SEQ_TO_INDEX(sequence);
3899         int huge = sequence & SEQ_HUGE_FRAME;
3900         int cmd_index;
3901         struct iwl4965_cmd *cmd;
3902
3903         /* If a Tx command is being handled and it isn't in the actual
3904          * command queue then there a command routing bug has been introduced
3905          * in the queue management code. */
3906         if (txq_id != IWL_CMD_QUEUE_NUM)
3907                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3908                           txq_id, pkt->hdr.cmd);
3909         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3910
3911         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3912         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3913
3914         /* Input error checking is done when commands are added to queue. */
3915         if (cmd->meta.flags & CMD_WANT_SKB) {
3916                 cmd->meta.source->u.skb = rxb->skb;
3917                 rxb->skb = NULL;
3918         } else if (cmd->meta.u.callback &&
3919                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3920                 rxb->skb = NULL;
3921
3922         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3923
3924         if (!(cmd->meta.flags & CMD_ASYNC)) {
3925                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3926                 wake_up_interruptible(&priv->wait_command_queue);
3927         }
3928 }
3929
3930 /************************** RX-FUNCTIONS ****************************/
3931 /*
3932  * Rx theory of operation
3933  *
3934  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3935  * each of which point to Receive Buffers to be filled by 4965.  These get
3936  * used not only for Rx frames, but for any command response or notification
3937  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3938  * of indexes into the circular buffer.
3939  *
3940  * Rx Queue Indexes
3941  * The host/firmware share two index registers for managing the Rx buffers.
3942  *
3943  * The READ index maps to the first position that the firmware may be writing
3944  * to -- the driver can read up to (but not including) this position and get
3945  * good data.
3946  * The READ index is managed by the firmware once the card is enabled.
3947  *
3948  * The WRITE index maps to the last position the driver has read from -- the
3949  * position preceding WRITE is the last slot the firmware can place a packet.
3950  *
3951  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3952  * WRITE = READ.
3953  *
3954  * During initialization, the host sets up the READ queue position to the first
3955  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3956  *
3957  * When the firmware places a packet in a buffer, it will advance the READ index
3958  * and fire the RX interrupt.  The driver can then query the READ index and
3959  * process as many packets as possible, moving the WRITE index forward as it
3960  * resets the Rx queue buffers with new memory.
3961  *
3962  * The management in the driver is as follows:
3963  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3964  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3965  *   to replenish the iwl->rxq->rx_free.
3966  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3967  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3968  *   'processed' and 'read' driver indexes as well)
3969  * + A received packet is processed and handed to the kernel network stack,
3970  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3971  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3972  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3973  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3974  *   were enough free buffers and RX_STALLED is set it is cleared.
3975  *
3976  *
3977  * Driver sequence:
3978  *
3979  * iwl4965_rx_queue_alloc()   Allocates rx_free
3980  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3981  *                            iwl4965_rx_queue_restock
3982  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3983  *                            queue, updates firmware pointers, and updates
3984  *                            the WRITE index.  If insufficient rx_free buffers
3985  *                            are available, schedules iwl4965_rx_replenish
3986  *
3987  * -- enable interrupts --
3988  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3989  *                            READ INDEX, detaching the SKB from the pool.
3990  *                            Moves the packet buffer from queue to rx_used.
3991  *                            Calls iwl4965_rx_queue_restock to refill any empty
3992  *                            slots.
3993  * ...
3994  *
3995  */
3996
3997 /**
3998  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3999  */
4000 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
4001 {
4002         int s = q->read - q->write;
4003         if (s <= 0)
4004                 s += RX_QUEUE_SIZE;
4005         /* keep some buffer to not confuse full and empty queue */
4006         s -= 2;
4007         if (s < 0)
4008                 s = 0;
4009         return s;
4010 }
4011
4012 /**
4013  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4014  */
4015 int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_rx_queue *q)
4016 {
4017         u32 reg = 0;
4018         int rc = 0;
4019         unsigned long flags;
4020
4021         spin_lock_irqsave(&q->lock, flags);
4022
4023         if (q->need_update == 0)
4024                 goto exit_unlock;
4025
4026         /* If power-saving is in use, make sure device is awake */
4027         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4028                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4029
4030                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4031                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4032                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4033                         goto exit_unlock;
4034                 }
4035
4036                 rc = iwl4965_grab_nic_access(priv);
4037                 if (rc)
4038                         goto exit_unlock;
4039
4040                 /* Device expects a multiple of 8 */
4041                 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4042                                      q->write & ~0x7);
4043                 iwl4965_release_nic_access(priv);
4044
4045         /* Else device is assumed to be awake */
4046         } else
4047                 /* Device expects a multiple of 8 */
4048                 iwl4965_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4049
4050
4051         q->need_update = 0;
4052
4053  exit_unlock:
4054         spin_unlock_irqrestore(&q->lock, flags);
4055         return rc;
4056 }
4057
4058 /**
4059  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
4060  */
4061 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
4062                                           dma_addr_t dma_addr)
4063 {
4064         return cpu_to_le32((u32)(dma_addr >> 8));
4065 }
4066
4067
4068 /**
4069  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
4070  *
4071  * If there are slots in the RX queue that need to be restocked,
4072  * and we have free pre-allocated buffers, fill the ranks as much
4073  * as we can, pulling from rx_free.
4074  *
4075  * This moves the 'write' index forward to catch up with 'processed', and
4076  * also updates the memory address in the firmware to reference the new
4077  * target buffer.
4078  */
4079 static int iwl4965_rx_queue_restock(struct iwl4965_priv *priv)
4080 {
4081         struct iwl4965_rx_queue *rxq = &priv->rxq;
4082         struct list_head *element;
4083         struct iwl4965_rx_mem_buffer *rxb;
4084         unsigned long flags;
4085         int write, rc;
4086
4087         spin_lock_irqsave(&rxq->lock, flags);
4088         write = rxq->write & ~0x7;
4089         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4090                 /* Get next free Rx buffer, remove from free list */
4091                 element = rxq->rx_free.next;
4092                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4093                 list_del(element);
4094
4095                 /* Point to Rx buffer via next RBD in circular buffer */
4096                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4097                 rxq->queue[rxq->write] = rxb;
4098                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4099                 rxq->free_count--;
4100         }
4101         spin_unlock_irqrestore(&rxq->lock, flags);
4102         /* If the pre-allocated buffer pool is dropping low, schedule to
4103          * refill it */
4104         if (rxq->free_count <= RX_LOW_WATERMARK)
4105                 queue_work(priv->workqueue, &priv->rx_replenish);
4106
4107
4108         /* If we've added more space for the firmware to place data, tell it.
4109          * Increment device's write pointer in multiples of 8. */
4110         if ((write != (rxq->write & ~0x7))
4111             || (abs(rxq->write - rxq->read) > 7)) {
4112                 spin_lock_irqsave(&rxq->lock, flags);
4113                 rxq->need_update = 1;
4114                 spin_unlock_irqrestore(&rxq->lock, flags);
4115                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
4116                 if (rc)
4117                         return rc;
4118         }
4119
4120         return 0;
4121 }
4122
4123 /**
4124  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
4125  *
4126  * When moving to rx_free an SKB is allocated for the slot.
4127  *
4128  * Also restock the Rx queue via iwl4965_rx_queue_restock.
4129  * This is called as a scheduled work item (except for during initialization)
4130  */
4131 static void iwl4965_rx_allocate(struct iwl4965_priv *priv)
4132 {
4133         struct iwl4965_rx_queue *rxq = &priv->rxq;
4134         struct list_head *element;
4135         struct iwl4965_rx_mem_buffer *rxb;
4136         unsigned long flags;
4137         spin_lock_irqsave(&rxq->lock, flags);
4138         while (!list_empty(&rxq->rx_used)) {
4139                 element = rxq->rx_used.next;
4140                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4141
4142                 /* Alloc a new receive buffer */
4143                 rxb->skb =
4144                     alloc_skb(priv->hw_setting.rx_buf_size,
4145                                 __GFP_NOWARN | GFP_ATOMIC);
4146                 if (!rxb->skb) {
4147                         if (net_ratelimit())
4148                                 printk(KERN_CRIT DRV_NAME
4149                                        ": Can not allocate SKB buffers\n");
4150                         /* We don't reschedule replenish work here -- we will
4151                          * call the restock method and if it still needs
4152                          * more buffers it will schedule replenish */
4153                         break;
4154                 }
4155                 priv->alloc_rxb_skb++;
4156                 list_del(element);
4157
4158                 /* Get physical address of RB/SKB */
4159                 rxb->dma_addr =
4160                     pci_map_single(priv->pci_dev, rxb->skb->data,
4161                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
4162                 list_add_tail(&rxb->list, &rxq->rx_free);
4163                 rxq->free_count++;
4164         }
4165         spin_unlock_irqrestore(&rxq->lock, flags);
4166 }
4167
4168 /*
4169  * this should be called while priv->lock is locked
4170 */
4171 static void __iwl4965_rx_replenish(void *data)
4172 {
4173         struct iwl4965_priv *priv = data;
4174
4175         iwl4965_rx_allocate(priv);
4176         iwl4965_rx_queue_restock(priv);
4177 }
4178
4179
4180 void iwl4965_rx_replenish(void *data)
4181 {
4182         struct iwl4965_priv *priv = data;
4183         unsigned long flags;
4184
4185         iwl4965_rx_allocate(priv);
4186
4187         spin_lock_irqsave(&priv->lock, flags);
4188         iwl4965_rx_queue_restock(priv);
4189         spin_unlock_irqrestore(&priv->lock, flags);
4190 }
4191
4192 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4193  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4194  * This free routine walks the list of POOL entries and if SKB is set to
4195  * non NULL it is unmapped and freed
4196  */
4197 static void iwl4965_rx_queue_free(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4198 {
4199         int i;
4200         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4201                 if (rxq->pool[i].skb != NULL) {
4202                         pci_unmap_single(priv->pci_dev,
4203                                          rxq->pool[i].dma_addr,
4204                                          priv->hw_setting.rx_buf_size,
4205                                          PCI_DMA_FROMDEVICE);
4206                         dev_kfree_skb(rxq->pool[i].skb);
4207                 }
4208         }
4209
4210         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4211                             rxq->dma_addr);
4212         rxq->bd = NULL;
4213 }
4214
4215 int iwl4965_rx_queue_alloc(struct iwl4965_priv *priv)
4216 {
4217         struct iwl4965_rx_queue *rxq = &priv->rxq;
4218         struct pci_dev *dev = priv->pci_dev;
4219         int i;
4220
4221         spin_lock_init(&rxq->lock);
4222         INIT_LIST_HEAD(&rxq->rx_free);
4223         INIT_LIST_HEAD(&rxq->rx_used);
4224
4225         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4226         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4227         if (!rxq->bd)
4228                 return -ENOMEM;
4229
4230         /* Fill the rx_used queue with _all_ of the Rx buffers */
4231         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4232                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4233
4234         /* Set us so that we have processed and used all buffers, but have
4235          * not restocked the Rx queue with fresh buffers */
4236         rxq->read = rxq->write = 0;
4237         rxq->free_count = 0;
4238         rxq->need_update = 0;
4239         return 0;
4240 }
4241
4242 void iwl4965_rx_queue_reset(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4243 {
4244         unsigned long flags;
4245         int i;
4246         spin_lock_irqsave(&rxq->lock, flags);
4247         INIT_LIST_HEAD(&rxq->rx_free);
4248         INIT_LIST_HEAD(&rxq->rx_used);
4249         /* Fill the rx_used queue with _all_ of the Rx buffers */
4250         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4251                 /* In the reset function, these buffers may have been allocated
4252                  * to an SKB, so we need to unmap and free potential storage */
4253                 if (rxq->pool[i].skb != NULL) {
4254                         pci_unmap_single(priv->pci_dev,
4255                                          rxq->pool[i].dma_addr,
4256                                          priv->hw_setting.rx_buf_size,
4257                                          PCI_DMA_FROMDEVICE);
4258                         priv->alloc_rxb_skb--;
4259                         dev_kfree_skb(rxq->pool[i].skb);
4260                         rxq->pool[i].skb = NULL;
4261                 }
4262                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4263         }
4264
4265         /* Set us so that we have processed and used all buffers, but have
4266          * not restocked the Rx queue with fresh buffers */
4267         rxq->read = rxq->write = 0;
4268         rxq->free_count = 0;
4269         spin_unlock_irqrestore(&rxq->lock, flags);
4270 }
4271
4272 /* Convert linear signal-to-noise ratio into dB */
4273 static u8 ratio2dB[100] = {
4274 /*       0   1   2   3   4   5   6   7   8   9 */
4275          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4276         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4277         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4278         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4279         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4280         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4281         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4282         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4283         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4284         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4285 };
4286
4287 /* Calculates a relative dB value from a ratio of linear
4288  *   (i.e. not dB) signal levels.
4289  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4290 int iwl4965_calc_db_from_ratio(int sig_ratio)
4291 {
4292         /* 1000:1 or higher just report as 60 dB */
4293         if (sig_ratio >= 1000)
4294                 return 60;
4295
4296         /* 100:1 or higher, divide by 10 and use table,
4297          *   add 20 dB to make up for divide by 10 */
4298         if (sig_ratio >= 100)
4299                 return (20 + (int)ratio2dB[sig_ratio/10]);
4300
4301         /* We shouldn't see this */
4302         if (sig_ratio < 1)
4303                 return 0;
4304
4305         /* Use table for ratios 1:1 - 99:1 */
4306         return (int)ratio2dB[sig_ratio];
4307 }
4308
4309 #define PERFECT_RSSI (-20) /* dBm */
4310 #define WORST_RSSI (-95)   /* dBm */
4311 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4312
4313 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4314  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4315  *   about formulas used below. */
4316 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4317 {
4318         int sig_qual;
4319         int degradation = PERFECT_RSSI - rssi_dbm;
4320
4321         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4322          * as indicator; formula is (signal dbm - noise dbm).
4323          * SNR at or above 40 is a great signal (100%).
4324          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4325          * Weakest usable signal is usually 10 - 15 dB SNR. */
4326         if (noise_dbm) {
4327                 if (rssi_dbm - noise_dbm >= 40)
4328                         return 100;
4329                 else if (rssi_dbm < noise_dbm)
4330                         return 0;
4331                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4332
4333         /* Else use just the signal level.
4334          * This formula is a least squares fit of data points collected and
4335          *   compared with a reference system that had a percentage (%) display
4336          *   for signal quality. */
4337         } else
4338                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4339                             (15 * RSSI_RANGE + 62 * degradation)) /
4340                            (RSSI_RANGE * RSSI_RANGE);
4341
4342         if (sig_qual > 100)
4343                 sig_qual = 100;
4344         else if (sig_qual < 1)
4345                 sig_qual = 0;
4346
4347         return sig_qual;
4348 }
4349
4350 /**
4351  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4352  *
4353  * Uses the priv->rx_handlers callback function array to invoke
4354  * the appropriate handlers, including command responses,
4355  * frame-received notifications, and other notifications.
4356  */
4357 static void iwl4965_rx_handle(struct iwl4965_priv *priv)
4358 {
4359         struct iwl4965_rx_mem_buffer *rxb;
4360         struct iwl4965_rx_packet *pkt;
4361         struct iwl4965_rx_queue *rxq = &priv->rxq;
4362         u32 r, i;
4363         int reclaim;
4364         unsigned long flags;
4365         u8 fill_rx = 0;
4366         u32 count = 8;
4367
4368         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4369          * buffer that the driver may process (last buffer filled by ucode). */
4370         r = iwl4965_hw_get_rx_read(priv);
4371         i = rxq->read;
4372
4373         /* Rx interrupt, but nothing sent from uCode */
4374         if (i == r)
4375                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4376
4377         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4378                 fill_rx = 1;
4379
4380         while (i != r) {
4381                 rxb = rxq->queue[i];
4382
4383                 /* If an RXB doesn't have a Rx queue slot associated with it,
4384                  * then a bug has been introduced in the queue refilling
4385                  * routines -- catch it here */
4386                 BUG_ON(rxb == NULL);
4387
4388                 rxq->queue[i] = NULL;
4389
4390                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4391                                             priv->hw_setting.rx_buf_size,
4392                                             PCI_DMA_FROMDEVICE);
4393                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4394
4395                 /* Reclaim a command buffer only if this packet is a response
4396                  *   to a (driver-originated) command.
4397                  * If the packet (e.g. Rx frame) originated from uCode,
4398                  *   there is no command buffer to reclaim.
4399                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4400                  *   but apparently a few don't get set; catch them here. */
4401                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4402                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4403                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4404                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4405                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4406                         (pkt->hdr.cmd != REPLY_TX);
4407
4408                 /* Based on type of command response or notification,
4409                  *   handle those that need handling via function in
4410                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4411                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4412                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4413                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4414                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4415                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4416                 } else {
4417                         /* No handling needed */
4418                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4419                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4420                                 r, i, get_cmd_string(pkt->hdr.cmd),
4421                                 pkt->hdr.cmd);
4422                 }
4423
4424                 if (reclaim) {
4425                         /* Invoke any callbacks, transfer the skb to caller, and
4426                          * fire off the (possibly) blocking iwl4965_send_cmd()
4427                          * as we reclaim the driver command queue */
4428                         if (rxb && rxb->skb)
4429                                 iwl4965_tx_cmd_complete(priv, rxb);
4430                         else
4431                                 IWL_WARNING("Claim null rxb?\n");
4432                 }
4433
4434                 /* For now we just don't re-use anything.  We can tweak this
4435                  * later to try and re-use notification packets and SKBs that
4436                  * fail to Rx correctly */
4437                 if (rxb->skb != NULL) {
4438                         priv->alloc_rxb_skb--;
4439                         dev_kfree_skb_any(rxb->skb);
4440                         rxb->skb = NULL;
4441                 }
4442
4443                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4444                                  priv->hw_setting.rx_buf_size,
4445                                  PCI_DMA_FROMDEVICE);
4446                 spin_lock_irqsave(&rxq->lock, flags);
4447                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4448                 spin_unlock_irqrestore(&rxq->lock, flags);
4449                 i = (i + 1) & RX_QUEUE_MASK;
4450                 /* If there are a lot of unused frames,
4451                  * restock the Rx queue so ucode wont assert. */
4452                 if (fill_rx) {
4453                         count++;
4454                         if (count >= 8) {
4455                                 priv->rxq.read = i;
4456                                 __iwl4965_rx_replenish(priv);
4457                                 count = 0;
4458                         }
4459                 }
4460         }
4461
4462         /* Backtrack one entry */
4463         priv->rxq.read = i;
4464         iwl4965_rx_queue_restock(priv);
4465 }
4466
4467 /**
4468  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4469  */
4470 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
4471                                   struct iwl4965_tx_queue *txq)
4472 {
4473         u32 reg = 0;
4474         int rc = 0;
4475         int txq_id = txq->q.id;
4476
4477         if (txq->need_update == 0)
4478                 return rc;
4479
4480         /* if we're trying to save power */
4481         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4482                 /* wake up nic if it's powered down ...
4483                  * uCode will wake up, and interrupt us again, so next
4484                  * time we'll skip this part. */
4485                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4486
4487                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4488                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4489                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4490                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4491                         return rc;
4492                 }
4493
4494                 /* restore this queue's parameters in nic hardware. */
4495                 rc = iwl4965_grab_nic_access(priv);
4496                 if (rc)
4497                         return rc;
4498                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
4499                                      txq->q.write_ptr | (txq_id << 8));
4500                 iwl4965_release_nic_access(priv);
4501
4502         /* else not in power-save mode, uCode will never sleep when we're
4503          * trying to tx (during RFKILL, we're not trying to tx). */
4504         } else
4505                 iwl4965_write32(priv, HBUS_TARG_WRPTR,
4506                             txq->q.write_ptr | (txq_id << 8));
4507
4508         txq->need_update = 0;
4509
4510         return rc;
4511 }
4512
4513 #ifdef CONFIG_IWL4965_DEBUG
4514 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4515 {
4516         DECLARE_MAC_BUF(mac);
4517
4518         IWL_DEBUG_RADIO("RX CONFIG:\n");
4519         iwl4965_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4520         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4521         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4522         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4523                         le32_to_cpu(rxon->filter_flags));
4524         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4525         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4526                         rxon->ofdm_basic_rates);
4527         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4528         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4529                         print_mac(mac, rxon->node_addr));
4530         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4531                         print_mac(mac, rxon->bssid_addr));
4532         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4533 }
4534 #endif
4535
4536 static void iwl4965_enable_interrupts(struct iwl4965_priv *priv)
4537 {
4538         IWL_DEBUG_ISR("Enabling interrupts\n");
4539         set_bit(STATUS_INT_ENABLED, &priv->status);
4540         iwl4965_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4541 }
4542
4543 static inline void iwl4965_disable_interrupts(struct iwl4965_priv *priv)
4544 {
4545         clear_bit(STATUS_INT_ENABLED, &priv->status);
4546
4547         /* disable interrupts from uCode/NIC to host */
4548         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4549
4550         /* acknowledge/clear/reset any interrupts still pending
4551          * from uCode or flow handler (Rx/Tx DMA) */
4552         iwl4965_write32(priv, CSR_INT, 0xffffffff);
4553         iwl4965_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4554         IWL_DEBUG_ISR("Disabled interrupts\n");
4555 }
4556
4557 static const char *desc_lookup(int i)
4558 {
4559         switch (i) {
4560         case 1:
4561                 return "FAIL";
4562         case 2:
4563                 return "BAD_PARAM";
4564         case 3:
4565                 return "BAD_CHECKSUM";
4566         case 4:
4567                 return "NMI_INTERRUPT";
4568         case 5:
4569                 return "SYSASSERT";
4570         case 6:
4571                 return "FATAL_ERROR";
4572         }
4573
4574         return "UNKNOWN";
4575 }
4576
4577 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4578 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4579
4580 static void iwl4965_dump_nic_error_log(struct iwl4965_priv *priv)
4581 {
4582         u32 data2, line;
4583         u32 desc, time, count, base, data1;
4584         u32 blink1, blink2, ilink1, ilink2;
4585         int rc;
4586
4587         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4588
4589         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4590                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4591                 return;
4592         }
4593
4594         rc = iwl4965_grab_nic_access(priv);
4595         if (rc) {
4596                 IWL_WARNING("Can not read from adapter at this time.\n");
4597                 return;
4598         }
4599
4600         count = iwl4965_read_targ_mem(priv, base);
4601
4602         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4603                 IWL_ERROR("Start IWL Error Log Dump:\n");
4604                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4605         }
4606
4607         desc = iwl4965_read_targ_mem(priv, base + 1 * sizeof(u32));
4608         blink1 = iwl4965_read_targ_mem(priv, base + 3 * sizeof(u32));
4609         blink2 = iwl4965_read_targ_mem(priv, base + 4 * sizeof(u32));
4610         ilink1 = iwl4965_read_targ_mem(priv, base + 5 * sizeof(u32));
4611         ilink2 = iwl4965_read_targ_mem(priv, base + 6 * sizeof(u32));
4612         data1 = iwl4965_read_targ_mem(priv, base + 7 * sizeof(u32));
4613         data2 = iwl4965_read_targ_mem(priv, base + 8 * sizeof(u32));
4614         line = iwl4965_read_targ_mem(priv, base + 9 * sizeof(u32));
4615         time = iwl4965_read_targ_mem(priv, base + 11 * sizeof(u32));
4616
4617         IWL_ERROR("Desc               Time       "
4618                   "data1      data2      line\n");
4619         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4620                   desc_lookup(desc), desc, time, data1, data2, line);
4621         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4622         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4623                   ilink1, ilink2);
4624
4625         iwl4965_release_nic_access(priv);
4626 }
4627
4628 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4629
4630 /**
4631  * iwl4965_print_event_log - Dump error event log to syslog
4632  *
4633  * NOTE: Must be called with iwl4965_grab_nic_access() already obtained!
4634  */
4635 static void iwl4965_print_event_log(struct iwl4965_priv *priv, u32 start_idx,
4636                                 u32 num_events, u32 mode)
4637 {
4638         u32 i;
4639         u32 base;       /* SRAM byte address of event log header */
4640         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4641         u32 ptr;        /* SRAM byte address of log data */
4642         u32 ev, time, data; /* event log data */
4643
4644         if (num_events == 0)
4645                 return;
4646
4647         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4648
4649         if (mode == 0)
4650                 event_size = 2 * sizeof(u32);
4651         else
4652                 event_size = 3 * sizeof(u32);
4653
4654         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4655
4656         /* "time" is actually "data" for mode 0 (no timestamp).
4657          * place event id # at far right for easier visual parsing. */
4658         for (i = 0; i < num_events; i++) {
4659                 ev = iwl4965_read_targ_mem(priv, ptr);
4660                 ptr += sizeof(u32);
4661                 time = iwl4965_read_targ_mem(priv, ptr);
4662                 ptr += sizeof(u32);
4663                 if (mode == 0)
4664                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4665                 else {
4666                         data = iwl4965_read_targ_mem(priv, ptr);
4667                         ptr += sizeof(u32);
4668                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4669                 }
4670         }
4671 }
4672
4673 static void iwl4965_dump_nic_event_log(struct iwl4965_priv *priv)
4674 {
4675         int rc;
4676         u32 base;       /* SRAM byte address of event log header */
4677         u32 capacity;   /* event log capacity in # entries */
4678         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4679         u32 num_wraps;  /* # times uCode wrapped to top of log */
4680         u32 next_entry; /* index of next entry to be written by uCode */
4681         u32 size;       /* # entries that we'll print */
4682
4683         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4684         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4685                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4686                 return;
4687         }
4688
4689         rc = iwl4965_grab_nic_access(priv);
4690         if (rc) {
4691                 IWL_WARNING("Can not read from adapter at this time.\n");
4692                 return;
4693         }
4694
4695         /* event log header */
4696         capacity = iwl4965_read_targ_mem(priv, base);
4697         mode = iwl4965_read_targ_mem(priv, base + (1 * sizeof(u32)));
4698         num_wraps = iwl4965_read_targ_mem(priv, base + (2 * sizeof(u32)));
4699         next_entry = iwl4965_read_targ_mem(priv, base + (3 * sizeof(u32)));
4700
4701         size = num_wraps ? capacity : next_entry;
4702
4703         /* bail out if nothing in log */
4704         if (size == 0) {
4705                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4706                 iwl4965_release_nic_access(priv);
4707                 return;
4708         }
4709
4710         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4711                   size, num_wraps);
4712
4713         /* if uCode has wrapped back to top of log, start at the oldest entry,
4714          * i.e the next one that uCode would fill. */
4715         if (num_wraps)
4716                 iwl4965_print_event_log(priv, next_entry,
4717                                     capacity - next_entry, mode);
4718
4719         /* (then/else) start at top of log */
4720         iwl4965_print_event_log(priv, 0, next_entry, mode);
4721
4722         iwl4965_release_nic_access(priv);
4723 }
4724
4725 /**
4726  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4727  */
4728 static void iwl4965_irq_handle_error(struct iwl4965_priv *priv)
4729 {
4730         /* Set the FW error flag -- cleared on iwl4965_down */
4731         set_bit(STATUS_FW_ERROR, &priv->status);
4732
4733         /* Cancel currently queued command. */
4734         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4735
4736 #ifdef CONFIG_IWL4965_DEBUG
4737         if (iwl4965_debug_level & IWL_DL_FW_ERRORS) {
4738                 iwl4965_dump_nic_error_log(priv);
4739                 iwl4965_dump_nic_event_log(priv);
4740                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4741         }
4742 #endif
4743
4744         wake_up_interruptible(&priv->wait_command_queue);
4745
4746         /* Keep the restart process from trying to send host
4747          * commands by clearing the INIT status bit */
4748         clear_bit(STATUS_READY, &priv->status);
4749
4750         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4751                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4752                           "Restarting adapter due to uCode error.\n");
4753
4754                 if (iwl4965_is_associated(priv)) {
4755                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4756                                sizeof(priv->recovery_rxon));
4757                         priv->error_recovering = 1;
4758                 }
4759                 queue_work(priv->workqueue, &priv->restart);
4760         }
4761 }
4762
4763 static void iwl4965_error_recovery(struct iwl4965_priv *priv)
4764 {
4765         unsigned long flags;
4766
4767         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4768                sizeof(priv->staging_rxon));
4769         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4770         iwl4965_commit_rxon(priv);
4771
4772         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4773
4774         spin_lock_irqsave(&priv->lock, flags);
4775         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4776         priv->error_recovering = 0;
4777         spin_unlock_irqrestore(&priv->lock, flags);
4778 }
4779
4780 static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
4781 {
4782         u32 inta, handled = 0;
4783         u32 inta_fh;
4784         unsigned long flags;
4785 #ifdef CONFIG_IWL4965_DEBUG
4786         u32 inta_mask;
4787 #endif
4788
4789         spin_lock_irqsave(&priv->lock, flags);
4790
4791         /* Ack/clear/reset pending uCode interrupts.
4792          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4793          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4794         inta = iwl4965_read32(priv, CSR_INT);
4795         iwl4965_write32(priv, CSR_INT, inta);
4796
4797         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4798          * Any new interrupts that happen after this, either while we're
4799          * in this tasklet, or later, will show up in next ISR/tasklet. */
4800         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4801         iwl4965_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4802
4803 #ifdef CONFIG_IWL4965_DEBUG
4804         if (iwl4965_debug_level & IWL_DL_ISR) {
4805                 /* just for debug */
4806                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
4807                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4808                               inta, inta_mask, inta_fh);
4809         }
4810 #endif
4811
4812         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4813          * atomic, make sure that inta covers all the interrupts that
4814          * we've discovered, even if FH interrupt came in just after
4815          * reading CSR_INT. */
4816         if (inta_fh & CSR49_FH_INT_RX_MASK)
4817                 inta |= CSR_INT_BIT_FH_RX;
4818         if (inta_fh & CSR49_FH_INT_TX_MASK)
4819                 inta |= CSR_INT_BIT_FH_TX;
4820
4821         /* Now service all interrupt bits discovered above. */
4822         if (inta & CSR_INT_BIT_HW_ERR) {
4823                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4824
4825                 /* Tell the device to stop sending interrupts */
4826                 iwl4965_disable_interrupts(priv);
4827
4828                 iwl4965_irq_handle_error(priv);
4829
4830                 handled |= CSR_INT_BIT_HW_ERR;
4831
4832                 spin_unlock_irqrestore(&priv->lock, flags);
4833
4834                 return;
4835         }
4836
4837 #ifdef CONFIG_IWL4965_DEBUG
4838         if (iwl4965_debug_level & (IWL_DL_ISR)) {
4839                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4840                 if (inta & CSR_INT_BIT_SCD)
4841                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4842                                       "the frame/frames.\n");
4843
4844                 /* Alive notification via Rx interrupt will do the real work */
4845                 if (inta & CSR_INT_BIT_ALIVE)
4846                         IWL_DEBUG_ISR("Alive interrupt\n");
4847         }
4848 #endif
4849         /* Safely ignore these bits for debug checks below */
4850         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4851
4852         /* HW RF KILL switch toggled */
4853         if (inta & CSR_INT_BIT_RF_KILL) {
4854                 int hw_rf_kill = 0;
4855                 if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
4856                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4857                         hw_rf_kill = 1;
4858
4859                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4860                                 "RF_KILL bit toggled to %s.\n",
4861                                 hw_rf_kill ? "disable radio":"enable radio");
4862
4863                 /* Queue restart only if RF_KILL switch was set to "kill"
4864                  *   when we loaded driver, and is now set to "enable".
4865                  * After we're Alive, RF_KILL gets handled by
4866                  *   iwl4965_rx_card_state_notif() */
4867                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4868                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4869                         queue_work(priv->workqueue, &priv->restart);
4870                 }
4871
4872                 handled |= CSR_INT_BIT_RF_KILL;
4873         }
4874
4875         /* Chip got too hot and stopped itself */
4876         if (inta & CSR_INT_BIT_CT_KILL) {
4877                 IWL_ERROR("Microcode CT kill error detected.\n");
4878                 handled |= CSR_INT_BIT_CT_KILL;
4879         }
4880
4881         /* Error detected by uCode */
4882         if (inta & CSR_INT_BIT_SW_ERR) {
4883                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4884                           inta);
4885                 iwl4965_irq_handle_error(priv);
4886                 handled |= CSR_INT_BIT_SW_ERR;
4887         }
4888
4889         /* uCode wakes up after power-down sleep */
4890         if (inta & CSR_INT_BIT_WAKEUP) {
4891                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4892                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4893                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4894                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4895                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4896                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4897                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4898                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4899
4900                 handled |= CSR_INT_BIT_WAKEUP;
4901         }
4902
4903         /* All uCode command responses, including Tx command responses,
4904          * Rx "responses" (frame-received notification), and other
4905          * notifications from uCode come through here*/
4906         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4907                 iwl4965_rx_handle(priv);
4908                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4909         }
4910
4911         if (inta & CSR_INT_BIT_FH_TX) {
4912                 IWL_DEBUG_ISR("Tx interrupt\n");
4913                 handled |= CSR_INT_BIT_FH_TX;
4914         }
4915
4916         if (inta & ~handled)
4917                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4918
4919         if (inta & ~CSR_INI_SET_MASK) {
4920                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4921                          inta & ~CSR_INI_SET_MASK);
4922                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4923         }
4924
4925         /* Re-enable all interrupts */
4926         iwl4965_enable_interrupts(priv);
4927
4928 #ifdef CONFIG_IWL4965_DEBUG
4929         if (iwl4965_debug_level & (IWL_DL_ISR)) {
4930                 inta = iwl4965_read32(priv, CSR_INT);
4931                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
4932                 inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4933                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4934                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4935         }
4936 #endif
4937         spin_unlock_irqrestore(&priv->lock, flags);
4938 }
4939
4940 static irqreturn_t iwl4965_isr(int irq, void *data)
4941 {
4942         struct iwl4965_priv *priv = data;
4943         u32 inta, inta_mask;
4944         u32 inta_fh;
4945         if (!priv)
4946                 return IRQ_NONE;
4947
4948         spin_lock(&priv->lock);
4949
4950         /* Disable (but don't clear!) interrupts here to avoid
4951          *    back-to-back ISRs and sporadic interrupts from our NIC.
4952          * If we have something to service, the tasklet will re-enable ints.
4953          * If we *don't* have something, we'll re-enable before leaving here. */
4954         inta_mask = iwl4965_read32(priv, CSR_INT_MASK);  /* just for debug */
4955         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4956
4957         /* Discover which interrupts are active/pending */
4958         inta = iwl4965_read32(priv, CSR_INT);
4959         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
4960
4961         /* Ignore interrupt if there's nothing in NIC to service.
4962          * This may be due to IRQ shared with another device,
4963          * or due to sporadic interrupts thrown from our NIC. */
4964         if (!inta && !inta_fh) {
4965                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4966                 goto none;
4967         }
4968
4969         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4970                 /* Hardware disappeared. It might have already raised
4971                  * an interrupt */
4972                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4973                 goto unplugged;
4974         }
4975
4976         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4977                       inta, inta_mask, inta_fh);
4978
4979         inta &= ~CSR_INT_BIT_SCD;
4980
4981         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4982         if (likely(inta || inta_fh))
4983                 tasklet_schedule(&priv->irq_tasklet);
4984
4985  unplugged:
4986         spin_unlock(&priv->lock);
4987         return IRQ_HANDLED;
4988
4989  none:
4990         /* re-enable interrupts here since we don't have anything to service. */
4991         iwl4965_enable_interrupts(priv);
4992         spin_unlock(&priv->lock);
4993         return IRQ_NONE;
4994 }
4995
4996 /************************** EEPROM BANDS ****************************
4997  *
4998  * The iwl4965_eeprom_band definitions below provide the mapping from the
4999  * EEPROM contents to the specific channel number supported for each
5000  * band.
5001  *
5002  * For example, iwl4965_priv->eeprom.band_3_channels[4] from the band_3
5003  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5004  * The specific geography and calibration information for that channel
5005  * is contained in the eeprom map itself.
5006  *
5007  * During init, we copy the eeprom information and channel map
5008  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5009  *
5010  * channel_map_24/52 provides the index in the channel_info array for a
5011  * given channel.  We have to have two separate maps as there is channel
5012  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5013  * band_2
5014  *
5015  * A value of 0xff stored in the channel_map indicates that the channel
5016  * is not supported by the hardware at all.
5017  *
5018  * A value of 0xfe in the channel_map indicates that the channel is not
5019  * valid for Tx with the current hardware.  This means that
5020  * while the system can tune and receive on a given channel, it may not
5021  * be able to associate or transmit any frames on that
5022  * channel.  There is no corresponding channel information for that
5023  * entry.
5024  *
5025  *********************************************************************/
5026
5027 /* 2.4 GHz */
5028 static const u8 iwl4965_eeprom_band_1[14] = {
5029         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5030 };
5031
5032 /* 5.2 GHz bands */
5033 static const u8 iwl4965_eeprom_band_2[] = {     /* 4915-5080MHz */
5034         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5035 };
5036
5037 static const u8 iwl4965_eeprom_band_3[] = {     /* 5170-5320MHz */
5038         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5039 };
5040
5041 static const u8 iwl4965_eeprom_band_4[] = {     /* 5500-5700MHz */
5042         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5043 };
5044
5045 static const u8 iwl4965_eeprom_band_5[] = {     /* 5725-5825MHz */
5046         145, 149, 153, 157, 161, 165
5047 };
5048
5049 static u8 iwl4965_eeprom_band_6[] = {       /* 2.4 FAT channel */
5050         1, 2, 3, 4, 5, 6, 7
5051 };
5052
5053 static u8 iwl4965_eeprom_band_7[] = {       /* 5.2 FAT channel */
5054         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5055 };
5056
5057 static void iwl4965_init_band_reference(const struct iwl4965_priv *priv,
5058                                     int band,
5059                                     int *eeprom_ch_count,
5060                                     const struct iwl4965_eeprom_channel
5061                                     **eeprom_ch_info,
5062                                     const u8 **eeprom_ch_index)
5063 {
5064         switch (band) {
5065         case 1:         /* 2.4GHz band */
5066                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_1);
5067                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5068                 *eeprom_ch_index = iwl4965_eeprom_band_1;
5069                 break;
5070         case 2:         /* 4.9GHz band */
5071                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_2);
5072                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5073                 *eeprom_ch_index = iwl4965_eeprom_band_2;
5074                 break;
5075         case 3:         /* 5.2GHz band */
5076                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_3);
5077                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5078                 *eeprom_ch_index = iwl4965_eeprom_band_3;
5079                 break;
5080         case 4:         /* 5.5GHz band */
5081                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_4);
5082                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5083                 *eeprom_ch_index = iwl4965_eeprom_band_4;
5084                 break;
5085         case 5:         /* 5.7GHz band */
5086                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_5);
5087                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5088                 *eeprom_ch_index = iwl4965_eeprom_band_5;
5089                 break;
5090         case 6:         /* 2.4GHz FAT channels */
5091                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_6);
5092                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5093                 *eeprom_ch_index = iwl4965_eeprom_band_6;
5094                 break;
5095         case 7:         /* 5 GHz FAT channels */
5096                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_7);
5097                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5098                 *eeprom_ch_index = iwl4965_eeprom_band_7;
5099                 break;
5100         default:
5101                 BUG();
5102                 return;
5103         }
5104 }
5105
5106 /**
5107  * iwl4965_get_channel_info - Find driver's private channel info
5108  *
5109  * Based on band and channel number.
5110  */
5111 const struct iwl4965_channel_info *iwl4965_get_channel_info(const struct iwl4965_priv *priv,
5112                                                     enum ieee80211_band band, u16 channel)
5113 {
5114         int i;
5115
5116         switch (band) {
5117         case IEEE80211_BAND_5GHZ:
5118                 for (i = 14; i < priv->channel_count; i++) {
5119                         if (priv->channel_info[i].channel == channel)
5120                                 return &priv->channel_info[i];
5121                 }
5122                 break;
5123         case IEEE80211_BAND_2GHZ:
5124                 if (channel >= 1 && channel <= 14)
5125                         return &priv->channel_info[channel - 1];
5126                 break;
5127         default:
5128                 BUG();
5129         }
5130
5131         return NULL;
5132 }
5133
5134 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5135                             ? # x " " : "")
5136
5137 /**
5138  * iwl4965_init_channel_map - Set up driver's info for all possible channels
5139  */
5140 static int iwl4965_init_channel_map(struct iwl4965_priv *priv)
5141 {
5142         int eeprom_ch_count = 0;
5143         const u8 *eeprom_ch_index = NULL;
5144         const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
5145         int band, ch;
5146         struct iwl4965_channel_info *ch_info;
5147
5148         if (priv->channel_count) {
5149                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5150                 return 0;
5151         }
5152
5153         if (priv->eeprom.version < 0x2f) {
5154                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5155                             priv->eeprom.version);
5156                 return -EINVAL;
5157         }
5158
5159         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5160
5161         priv->channel_count =
5162             ARRAY_SIZE(iwl4965_eeprom_band_1) +
5163             ARRAY_SIZE(iwl4965_eeprom_band_2) +
5164             ARRAY_SIZE(iwl4965_eeprom_band_3) +
5165             ARRAY_SIZE(iwl4965_eeprom_band_4) +
5166             ARRAY_SIZE(iwl4965_eeprom_band_5);
5167
5168         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5169
5170         priv->channel_info = kzalloc(sizeof(struct iwl4965_channel_info) *
5171                                      priv->channel_count, GFP_KERNEL);
5172         if (!priv->channel_info) {
5173                 IWL_ERROR("Could not allocate channel_info\n");
5174                 priv->channel_count = 0;
5175                 return -ENOMEM;
5176         }
5177
5178         ch_info = priv->channel_info;
5179
5180         /* Loop through the 5 EEPROM bands adding them in order to the
5181          * channel map we maintain (that contains additional information than
5182          * what just in the EEPROM) */
5183         for (band = 1; band <= 5; band++) {
5184
5185                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5186                                         &eeprom_ch_info, &eeprom_ch_index);
5187
5188                 /* Loop through each band adding each of the channels */
5189                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5190                         ch_info->channel = eeprom_ch_index[ch];
5191                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
5192                             IEEE80211_BAND_5GHZ;
5193
5194                         /* permanently store EEPROM's channel regulatory flags
5195                          *   and max power in channel info database. */
5196                         ch_info->eeprom = eeprom_ch_info[ch];
5197
5198                         /* Copy the run-time flags so they are there even on
5199                          * invalid channels */
5200                         ch_info->flags = eeprom_ch_info[ch].flags;
5201
5202                         if (!(is_channel_valid(ch_info))) {
5203                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5204                                                "No traffic\n",
5205                                                ch_info->channel,
5206                                                ch_info->flags,
5207                                                is_channel_a_band(ch_info) ?
5208                                                "5.2" : "2.4");
5209                                 ch_info++;
5210                                 continue;
5211                         }
5212
5213                         /* Initialize regulatory-based run-time data */
5214                         ch_info->max_power_avg = ch_info->curr_txpow =
5215                             eeprom_ch_info[ch].max_power_avg;
5216                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5217                         ch_info->min_power = 0;
5218
5219                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s%s(0x%02x"
5220                                        " %ddBm): Ad-Hoc %ssupported\n",
5221                                        ch_info->channel,
5222                                        is_channel_a_band(ch_info) ?
5223                                        "5.2" : "2.4",
5224                                        CHECK_AND_PRINT(VALID),
5225                                        CHECK_AND_PRINT(IBSS),
5226                                        CHECK_AND_PRINT(ACTIVE),
5227                                        CHECK_AND_PRINT(RADAR),
5228                                        CHECK_AND_PRINT(WIDE),
5229                                        CHECK_AND_PRINT(NARROW),
5230                                        CHECK_AND_PRINT(DFS),
5231                                        eeprom_ch_info[ch].flags,
5232                                        eeprom_ch_info[ch].max_power_avg,
5233                                        ((eeprom_ch_info[ch].
5234                                          flags & EEPROM_CHANNEL_IBSS)
5235                                         && !(eeprom_ch_info[ch].
5236                                              flags & EEPROM_CHANNEL_RADAR))
5237                                        ? "" : "not ");
5238
5239                         /* Set the user_txpower_limit to the highest power
5240                          * supported by any channel */
5241                         if (eeprom_ch_info[ch].max_power_avg >
5242                             priv->user_txpower_limit)
5243                                 priv->user_txpower_limit =
5244                                     eeprom_ch_info[ch].max_power_avg;
5245
5246                         ch_info++;
5247                 }
5248         }
5249
5250         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
5251         for (band = 6; band <= 7; band++) {
5252                 enum ieee80211_band ieeeband;
5253                 u8 fat_extension_chan;
5254
5255                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5256                                         &eeprom_ch_info, &eeprom_ch_index);
5257
5258                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
5259                 ieeeband = (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
5260
5261                 /* Loop through each band adding each of the channels */
5262                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5263
5264                         if ((band == 6) &&
5265                             ((eeprom_ch_index[ch] == 5) ||
5266                             (eeprom_ch_index[ch] == 6) ||
5267                             (eeprom_ch_index[ch] == 7)))
5268                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5269                         else
5270                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5271
5272                         /* Set up driver's info for lower half */
5273                         iwl4965_set_fat_chan_info(priv, ieeeband,
5274                                                   eeprom_ch_index[ch],
5275                                                   &(eeprom_ch_info[ch]),
5276                                                   fat_extension_chan);
5277
5278                         /* Set up driver's info for upper half */
5279                         iwl4965_set_fat_chan_info(priv, ieeeband,
5280                                                   (eeprom_ch_index[ch] + 4),
5281                                                   &(eeprom_ch_info[ch]),
5282                                                   HT_IE_EXT_CHANNEL_BELOW);
5283                 }
5284         }
5285
5286         return 0;
5287 }
5288
5289 /*
5290  * iwl4965_free_channel_map - undo allocations in iwl4965_init_channel_map
5291  */
5292 static void iwl4965_free_channel_map(struct iwl4965_priv *priv)
5293 {
5294         kfree(priv->channel_info);
5295         priv->channel_count = 0;
5296 }
5297
5298 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5299  * sending probe req.  This should be set long enough to hear probe responses
5300  * from more than one AP.  */
5301 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5302 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5303
5304 /* For faster active scanning, scan will move to the next channel if fewer than
5305  * PLCP_QUIET_THRESH packets are heard on this channel within
5306  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5307  * time if it's a quiet channel (nothing responded to our probe, and there's
5308  * no other traffic).
5309  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5310 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5311 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5312
5313 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5314  * Must be set longer than active dwell time.
5315  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5316 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5317 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5318 #define IWL_PASSIVE_DWELL_BASE      (100)
5319 #define IWL_CHANNEL_TUNE_TIME       5
5320
5321 static inline u16 iwl4965_get_active_dwell_time(struct iwl4965_priv *priv,
5322                                                 enum ieee80211_band band)
5323 {
5324         if (band == IEEE80211_BAND_5GHZ)
5325                 return IWL_ACTIVE_DWELL_TIME_52;
5326         else
5327                 return IWL_ACTIVE_DWELL_TIME_24;
5328 }
5329
5330 static u16 iwl4965_get_passive_dwell_time(struct iwl4965_priv *priv,
5331                                           enum ieee80211_band band)
5332 {
5333         u16 active = iwl4965_get_active_dwell_time(priv, band);
5334         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
5335             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5336             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5337
5338         if (iwl4965_is_associated(priv)) {
5339                 /* If we're associated, we clamp the maximum passive
5340                  * dwell time to be 98% of the beacon interval (minus
5341                  * 2 * channel tune time) */
5342                 passive = priv->beacon_int;
5343                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5344                         passive = IWL_PASSIVE_DWELL_BASE;
5345                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5346         }
5347
5348         if (passive <= active)
5349                 passive = active + 1;
5350
5351         return passive;
5352 }
5353
5354 static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv,
5355                                          enum ieee80211_band band,
5356                                      u8 is_active, u8 direct_mask,
5357                                      struct iwl4965_scan_channel *scan_ch)
5358 {
5359         const struct ieee80211_channel *channels = NULL;
5360         const struct ieee80211_supported_band *sband;
5361         const struct iwl4965_channel_info *ch_info;
5362         u16 passive_dwell = 0;
5363         u16 active_dwell = 0;
5364         int added, i;
5365
5366         sband = iwl4965_get_hw_mode(priv, band);
5367         if (!sband)
5368                 return 0;
5369
5370         channels = sband->channels;
5371
5372         active_dwell = iwl4965_get_active_dwell_time(priv, band);
5373         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
5374
5375         for (i = 0, added = 0; i < sband->n_channels; i++) {
5376                 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
5377                     le16_to_cpu(priv->active_rxon.channel)) {
5378                         if (iwl4965_is_associated(priv)) {
5379                                 IWL_DEBUG_SCAN
5380                                     ("Skipping current channel %d\n",
5381                                      le16_to_cpu(priv->active_rxon.channel));
5382                                 continue;
5383                         }
5384                 } else if (priv->only_active_channel)
5385                         continue;
5386
5387                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
5388
5389                 ch_info = iwl4965_get_channel_info(priv, band,
5390                                          scan_ch->channel);
5391                 if (!is_channel_valid(ch_info)) {
5392                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5393                                        scan_ch->channel);
5394                         continue;
5395                 }
5396
5397                 if (!is_active || is_channel_passive(ch_info) ||
5398                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
5399                         scan_ch->type = 0;      /* passive */
5400                 else
5401                         scan_ch->type = 1;      /* active */
5402
5403                 if (scan_ch->type & 1)
5404                         scan_ch->type |= (direct_mask << 1);
5405
5406                 if (is_channel_narrow(ch_info))
5407                         scan_ch->type |= (1 << 7);
5408
5409                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5410                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5411
5412                 /* Set txpower levels to defaults */
5413                 scan_ch->tpc.dsp_atten = 110;
5414                 /* scan_pwr_info->tpc.dsp_atten; */
5415
5416                 /*scan_pwr_info->tpc.tx_gain; */
5417                 if (band == IEEE80211_BAND_5GHZ)
5418                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5419                 else {
5420                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5421                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5422                          * power level:
5423                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5424                          */
5425                 }
5426
5427                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5428                                scan_ch->channel,
5429                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5430                                (scan_ch->type & 1) ?
5431                                active_dwell : passive_dwell);
5432
5433                 scan_ch++;
5434                 added++;
5435         }
5436
5437         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5438         return added;
5439 }
5440
5441 static void iwl4965_init_hw_rates(struct iwl4965_priv *priv,
5442                               struct ieee80211_rate *rates)
5443 {
5444         int i;
5445
5446         for (i = 0; i < IWL_RATE_COUNT; i++) {
5447                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
5448                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5449                 rates[i].hw_value_short = i;
5450                 rates[i].flags = 0;
5451                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5452                         /*
5453                          * If CCK != 1M then set short preamble rate flag.
5454                          */
5455                         rates[i].flags |=
5456                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
5457                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
5458                 }
5459         }
5460 }
5461
5462 /**
5463  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
5464  */
5465 static int iwl4965_init_geos(struct iwl4965_priv *priv)
5466 {
5467         struct iwl4965_channel_info *ch;
5468         struct ieee80211_supported_band *sband;
5469         struct ieee80211_channel *channels;
5470         struct ieee80211_channel *geo_ch;
5471         struct ieee80211_rate *rates;
5472         int i = 0;
5473
5474         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5475             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5476                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5477                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5478                 return 0;
5479         }
5480
5481         channels = kzalloc(sizeof(struct ieee80211_channel) *
5482                            priv->channel_count, GFP_KERNEL);
5483         if (!channels)
5484                 return -ENOMEM;
5485
5486         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
5487                         GFP_KERNEL);
5488         if (!rates) {
5489                 kfree(channels);
5490                 return -ENOMEM;
5491         }
5492
5493         /* 5.2GHz channels start after the 2.4GHz channels */
5494         sband = &priv->bands[IEEE80211_BAND_5GHZ];
5495         sband->channels = &channels[ARRAY_SIZE(iwl4965_eeprom_band_1)];
5496         /* just OFDM */
5497         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
5498         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
5499
5500         iwl4965_init_ht_hw_capab(&sband->ht_info, IEEE80211_BAND_5GHZ);
5501
5502         sband = &priv->bands[IEEE80211_BAND_2GHZ];
5503         sband->channels = channels;
5504         /* OFDM & CCK */
5505         sband->bitrates = rates;
5506         sband->n_bitrates = IWL_RATE_COUNT;
5507
5508         iwl4965_init_ht_hw_capab(&sband->ht_info, IEEE80211_BAND_2GHZ);
5509
5510         priv->ieee_channels = channels;
5511         priv->ieee_rates = rates;
5512
5513         iwl4965_init_hw_rates(priv, rates);
5514
5515         for (i = 0;  i < priv->channel_count; i++) {
5516                 ch = &priv->channel_info[i];
5517
5518                 /* FIXME: might be removed if scan is OK */
5519                 if (!is_channel_valid(ch))
5520                         continue;
5521
5522                 if (is_channel_a_band(ch))
5523                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
5524                 else
5525                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
5526
5527                 geo_ch = &sband->channels[sband->n_channels++];
5528
5529                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
5530                 geo_ch->max_power = ch->max_power_avg;
5531                 geo_ch->max_antenna_gain = 0xff;
5532                 geo_ch->hw_value = ch->channel;
5533
5534                 if (is_channel_valid(ch)) {
5535                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5536                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5537
5538                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5539                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5540
5541                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5542                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5543
5544                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5545                                 priv->max_channel_txpower_limit =
5546                                     ch->max_power_avg;
5547                 } else {
5548                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5549                 }
5550
5551                 /* Save flags for reg domain usage */
5552                 geo_ch->orig_flags = geo_ch->flags;
5553
5554                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
5555                                 ch->channel, geo_ch->center_freq,
5556                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
5557                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
5558                                 "restricted" : "valid",
5559                                  geo_ch->flags);
5560         }
5561
5562         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
5563              priv->cfg->sku & IWL_SKU_A) {
5564                 printk(KERN_INFO DRV_NAME
5565                        ": Incorrectly detected BG card as ABG.  Please send "
5566                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5567                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5568                 priv->cfg->sku &= ~IWL_SKU_A;
5569         }
5570
5571         printk(KERN_INFO DRV_NAME
5572                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5573                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5574                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5575
5576         priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ];
5577         priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ];
5578
5579         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5580
5581         return 0;
5582 }
5583
5584 /*
5585  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5586  */
5587 static void iwl4965_free_geos(struct iwl4965_priv *priv)
5588 {
5589         kfree(priv->ieee_channels);
5590         kfree(priv->ieee_rates);
5591         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5592 }
5593
5594 /******************************************************************************
5595  *
5596  * uCode download functions
5597  *
5598  ******************************************************************************/
5599
5600 static void iwl4965_dealloc_ucode_pci(struct iwl4965_priv *priv)
5601 {
5602         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5603         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5604         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5605         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5606         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5607         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5608 }
5609
5610 /**
5611  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5612  *     looking at all data.
5613  */
5614 static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 *image,
5615                                  u32 len)
5616 {
5617         u32 val;
5618         u32 save_len = len;
5619         int rc = 0;
5620         u32 errcnt;
5621
5622         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5623
5624         rc = iwl4965_grab_nic_access(priv);
5625         if (rc)
5626                 return rc;
5627
5628         iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5629
5630         errcnt = 0;
5631         for (; len > 0; len -= sizeof(u32), image++) {
5632                 /* read data comes through single port, auto-incr addr */
5633                 /* NOTE: Use the debugless read so we don't flood kernel log
5634                  * if IWL_DL_IO is set */
5635                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5636                 if (val != le32_to_cpu(*image)) {
5637                         IWL_ERROR("uCode INST section is invalid at "
5638                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5639                                   save_len - len, val, le32_to_cpu(*image));
5640                         rc = -EIO;
5641                         errcnt++;
5642                         if (errcnt >= 20)
5643                                 break;
5644                 }
5645         }
5646
5647         iwl4965_release_nic_access(priv);
5648
5649         if (!errcnt)
5650                 IWL_DEBUG_INFO
5651                     ("ucode image in INSTRUCTION memory is good\n");
5652
5653         return rc;
5654 }
5655
5656
5657 /**
5658  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
5659  *   using sample data 100 bytes apart.  If these sample points are good,
5660  *   it's a pretty good bet that everything between them is good, too.
5661  */
5662 static int iwl4965_verify_inst_sparse(struct iwl4965_priv *priv, __le32 *image, u32 len)
5663 {
5664         u32 val;
5665         int rc = 0;
5666         u32 errcnt = 0;
5667         u32 i;
5668
5669         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5670
5671         rc = iwl4965_grab_nic_access(priv);
5672         if (rc)
5673                 return rc;
5674
5675         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5676                 /* read data comes through single port, auto-incr addr */
5677                 /* NOTE: Use the debugless read so we don't flood kernel log
5678                  * if IWL_DL_IO is set */
5679                 iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5680                         i + RTC_INST_LOWER_BOUND);
5681                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5682                 if (val != le32_to_cpu(*image)) {
5683 #if 0 /* Enable this if you want to see details */
5684                         IWL_ERROR("uCode INST section is invalid at "
5685                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5686                                   i, val, *image);
5687 #endif
5688                         rc = -EIO;
5689                         errcnt++;
5690                         if (errcnt >= 3)
5691                                 break;
5692                 }
5693         }
5694
5695         iwl4965_release_nic_access(priv);
5696
5697         return rc;
5698 }
5699
5700
5701 /**
5702  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
5703  *    and verify its contents
5704  */
5705 static int iwl4965_verify_ucode(struct iwl4965_priv *priv)
5706 {
5707         __le32 *image;
5708         u32 len;
5709         int rc = 0;
5710
5711         /* Try bootstrap */
5712         image = (__le32 *)priv->ucode_boot.v_addr;
5713         len = priv->ucode_boot.len;
5714         rc = iwl4965_verify_inst_sparse(priv, image, len);
5715         if (rc == 0) {
5716                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5717                 return 0;
5718         }
5719
5720         /* Try initialize */
5721         image = (__le32 *)priv->ucode_init.v_addr;
5722         len = priv->ucode_init.len;
5723         rc = iwl4965_verify_inst_sparse(priv, image, len);
5724         if (rc == 0) {
5725                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5726                 return 0;
5727         }
5728
5729         /* Try runtime/protocol */
5730         image = (__le32 *)priv->ucode_code.v_addr;
5731         len = priv->ucode_code.len;
5732         rc = iwl4965_verify_inst_sparse(priv, image, len);
5733         if (rc == 0) {
5734                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5735                 return 0;
5736         }
5737
5738         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5739
5740         /* Since nothing seems to match, show first several data entries in
5741          * instruction SRAM, so maybe visual inspection will give a clue.
5742          * Selection of bootstrap image (vs. other images) is arbitrary. */
5743         image = (__le32 *)priv->ucode_boot.v_addr;
5744         len = priv->ucode_boot.len;
5745         rc = iwl4965_verify_inst_full(priv, image, len);
5746
5747         return rc;
5748 }
5749
5750
5751 /* check contents of special bootstrap uCode SRAM */
5752 static int iwl4965_verify_bsm(struct iwl4965_priv *priv)
5753 {
5754         __le32 *image = priv->ucode_boot.v_addr;
5755         u32 len = priv->ucode_boot.len;
5756         u32 reg;
5757         u32 val;
5758
5759         IWL_DEBUG_INFO("Begin verify bsm\n");
5760
5761         /* verify BSM SRAM contents */
5762         val = iwl4965_read_prph(priv, BSM_WR_DWCOUNT_REG);
5763         for (reg = BSM_SRAM_LOWER_BOUND;
5764              reg < BSM_SRAM_LOWER_BOUND + len;
5765              reg += sizeof(u32), image ++) {
5766                 val = iwl4965_read_prph(priv, reg);
5767                 if (val != le32_to_cpu(*image)) {
5768                         IWL_ERROR("BSM uCode verification failed at "
5769                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5770                                   BSM_SRAM_LOWER_BOUND,
5771                                   reg - BSM_SRAM_LOWER_BOUND, len,
5772                                   val, le32_to_cpu(*image));
5773                         return -EIO;
5774                 }
5775         }
5776
5777         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5778
5779         return 0;
5780 }
5781
5782 /**
5783  * iwl4965_load_bsm - Load bootstrap instructions
5784  *
5785  * BSM operation:
5786  *
5787  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5788  * in special SRAM that does not power down during RFKILL.  When powering back
5789  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5790  * the bootstrap program into the on-board processor, and starts it.
5791  *
5792  * The bootstrap program loads (via DMA) instructions and data for a new
5793  * program from host DRAM locations indicated by the host driver in the
5794  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5795  * automatically.
5796  *
5797  * When initializing the NIC, the host driver points the BSM to the
5798  * "initialize" uCode image.  This uCode sets up some internal data, then
5799  * notifies host via "initialize alive" that it is complete.
5800  *
5801  * The host then replaces the BSM_DRAM_* pointer values to point to the
5802  * normal runtime uCode instructions and a backup uCode data cache buffer
5803  * (filled initially with starting data values for the on-board processor),
5804  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5805  * which begins normal operation.
5806  *
5807  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5808  * the backup data cache in DRAM before SRAM is powered down.
5809  *
5810  * When powering back up, the BSM loads the bootstrap program.  This reloads
5811  * the runtime uCode instructions and the backup data cache into SRAM,
5812  * and re-launches the runtime uCode from where it left off.
5813  */
5814 static int iwl4965_load_bsm(struct iwl4965_priv *priv)
5815 {
5816         __le32 *image = priv->ucode_boot.v_addr;
5817         u32 len = priv->ucode_boot.len;
5818         dma_addr_t pinst;
5819         dma_addr_t pdata;
5820         u32 inst_len;
5821         u32 data_len;
5822         int rc;
5823         int i;
5824         u32 done;
5825         u32 reg_offset;
5826
5827         IWL_DEBUG_INFO("Begin load bsm\n");
5828
5829         /* make sure bootstrap program is no larger than BSM's SRAM size */
5830         if (len > IWL_MAX_BSM_SIZE)
5831                 return -EINVAL;
5832
5833         /* Tell bootstrap uCode where to find the "Initialize" uCode
5834          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
5835          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
5836          *        after the "initialize" uCode has run, to point to
5837          *        runtime/protocol instructions and backup data cache. */
5838         pinst = priv->ucode_init.p_addr >> 4;
5839         pdata = priv->ucode_init_data.p_addr >> 4;
5840         inst_len = priv->ucode_init.len;
5841         data_len = priv->ucode_init_data.len;
5842
5843         rc = iwl4965_grab_nic_access(priv);
5844         if (rc)
5845                 return rc;
5846
5847         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5848         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5849         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5850         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5851
5852         /* Fill BSM memory with bootstrap instructions */
5853         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5854              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5855              reg_offset += sizeof(u32), image++)
5856                 _iwl4965_write_prph(priv, reg_offset,
5857                                           le32_to_cpu(*image));
5858
5859         rc = iwl4965_verify_bsm(priv);
5860         if (rc) {
5861                 iwl4965_release_nic_access(priv);
5862                 return rc;
5863         }
5864
5865         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5866         iwl4965_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5867         iwl4965_write_prph(priv, BSM_WR_MEM_DST_REG,
5868                                  RTC_INST_LOWER_BOUND);
5869         iwl4965_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5870
5871         /* Load bootstrap code into instruction SRAM now,
5872          *   to prepare to load "initialize" uCode */
5873         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
5874                 BSM_WR_CTRL_REG_BIT_START);
5875
5876         /* Wait for load of bootstrap uCode to finish */
5877         for (i = 0; i < 100; i++) {
5878                 done = iwl4965_read_prph(priv, BSM_WR_CTRL_REG);
5879                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5880                         break;
5881                 udelay(10);
5882         }
5883         if (i < 100)
5884                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5885         else {
5886                 IWL_ERROR("BSM write did not complete!\n");
5887                 return -EIO;
5888         }
5889
5890         /* Enable future boot loads whenever power management unit triggers it
5891          *   (e.g. when powering back up after power-save shutdown) */
5892         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
5893                 BSM_WR_CTRL_REG_BIT_START_EN);
5894
5895         iwl4965_release_nic_access(priv);
5896
5897         return 0;
5898 }
5899
5900 static void iwl4965_nic_start(struct iwl4965_priv *priv)
5901 {
5902         /* Remove all resets to allow NIC to operate */
5903         iwl4965_write32(priv, CSR_RESET, 0);
5904 }
5905
5906
5907 /**
5908  * iwl4965_read_ucode - Read uCode images from disk file.
5909  *
5910  * Copy into buffers for card to fetch via bus-mastering
5911  */
5912 static int iwl4965_read_ucode(struct iwl4965_priv *priv)
5913 {
5914         struct iwl4965_ucode *ucode;
5915         int ret;
5916         const struct firmware *ucode_raw;
5917         const char *name = priv->cfg->fw_name;
5918         u8 *src;
5919         size_t len;
5920         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5921
5922         /* Ask kernel firmware_class module to get the boot firmware off disk.
5923          * request_firmware() is synchronous, file is in memory on return. */
5924         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5925         if (ret < 0) {
5926                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5927                                         name, ret);
5928                 goto error;
5929         }
5930
5931         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5932                        name, ucode_raw->size);
5933
5934         /* Make sure that we got at least our header! */
5935         if (ucode_raw->size < sizeof(*ucode)) {
5936                 IWL_ERROR("File size way too small!\n");
5937                 ret = -EINVAL;
5938                 goto err_release;
5939         }
5940
5941         /* Data from ucode file:  header followed by uCode images */
5942         ucode = (void *)ucode_raw->data;
5943
5944         ver = le32_to_cpu(ucode->ver);
5945         inst_size = le32_to_cpu(ucode->inst_size);
5946         data_size = le32_to_cpu(ucode->data_size);
5947         init_size = le32_to_cpu(ucode->init_size);
5948         init_data_size = le32_to_cpu(ucode->init_data_size);
5949         boot_size = le32_to_cpu(ucode->boot_size);
5950
5951         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5952         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5953                        inst_size);
5954         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5955                        data_size);
5956         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5957                        init_size);
5958         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5959                        init_data_size);
5960         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5961                        boot_size);
5962
5963         /* Verify size of file vs. image size info in file's header */
5964         if (ucode_raw->size < sizeof(*ucode) +
5965                 inst_size + data_size + init_size +
5966                 init_data_size + boot_size) {
5967
5968                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5969                                (int)ucode_raw->size);
5970                 ret = -EINVAL;
5971                 goto err_release;
5972         }
5973
5974         /* Verify that uCode images will fit in card's SRAM */
5975         if (inst_size > IWL_MAX_INST_SIZE) {
5976                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5977                                inst_size);
5978                 ret = -EINVAL;
5979                 goto err_release;
5980         }
5981
5982         if (data_size > IWL_MAX_DATA_SIZE) {
5983                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5984                                 data_size);
5985                 ret = -EINVAL;
5986                 goto err_release;
5987         }
5988         if (init_size > IWL_MAX_INST_SIZE) {
5989                 IWL_DEBUG_INFO
5990                     ("uCode init instr len %d too large to fit in\n",
5991                       init_size);
5992                 ret = -EINVAL;
5993                 goto err_release;
5994         }
5995         if (init_data_size > IWL_MAX_DATA_SIZE) {
5996                 IWL_DEBUG_INFO
5997                     ("uCode init data len %d too large to fit in\n",
5998                       init_data_size);
5999                 ret = -EINVAL;
6000                 goto err_release;
6001         }
6002         if (boot_size > IWL_MAX_BSM_SIZE) {
6003                 IWL_DEBUG_INFO
6004                     ("uCode boot instr len %d too large to fit in\n",
6005                       boot_size);
6006                 ret = -EINVAL;
6007                 goto err_release;
6008         }
6009
6010         /* Allocate ucode buffers for card's bus-master loading ... */
6011
6012         /* Runtime instructions and 2 copies of data:
6013          * 1) unmodified from disk
6014          * 2) backup cache for save/restore during power-downs */
6015         priv->ucode_code.len = inst_size;
6016         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
6017
6018         priv->ucode_data.len = data_size;
6019         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
6020
6021         priv->ucode_data_backup.len = data_size;
6022         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
6023
6024         /* Initialization instructions and data */
6025         if (init_size && init_data_size) {
6026                 priv->ucode_init.len = init_size;
6027                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
6028
6029                 priv->ucode_init_data.len = init_data_size;
6030                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
6031
6032                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
6033                         goto err_pci_alloc;
6034         }
6035
6036         /* Bootstrap (instructions only, no data) */
6037         if (boot_size) {
6038                 priv->ucode_boot.len = boot_size;
6039                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
6040
6041                 if (!priv->ucode_boot.v_addr)
6042                         goto err_pci_alloc;
6043         }
6044
6045         /* Copy images into buffers for card's bus-master reads ... */
6046
6047         /* Runtime instructions (first block of data in file) */
6048         src = &ucode->data[0];
6049         len = priv->ucode_code.len;
6050         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
6051         memcpy(priv->ucode_code.v_addr, src, len);
6052         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6053                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6054
6055         /* Runtime data (2nd block)
6056          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
6057         src = &ucode->data[inst_size];
6058         len = priv->ucode_data.len;
6059         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
6060         memcpy(priv->ucode_data.v_addr, src, len);
6061         memcpy(priv->ucode_data_backup.v_addr, src, len);
6062
6063         /* Initialization instructions (3rd block) */
6064         if (init_size) {
6065                 src = &ucode->data[inst_size + data_size];
6066                 len = priv->ucode_init.len;
6067                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
6068                                 len);
6069                 memcpy(priv->ucode_init.v_addr, src, len);
6070         }
6071
6072         /* Initialization data (4th block) */
6073         if (init_data_size) {
6074                 src = &ucode->data[inst_size + data_size + init_size];
6075                 len = priv->ucode_init_data.len;
6076                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
6077                                len);
6078                 memcpy(priv->ucode_init_data.v_addr, src, len);
6079         }
6080
6081         /* Bootstrap instructions (5th block) */
6082         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6083         len = priv->ucode_boot.len;
6084         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
6085         memcpy(priv->ucode_boot.v_addr, src, len);
6086
6087         /* We have our copies now, allow OS release its copies */
6088         release_firmware(ucode_raw);
6089         return 0;
6090
6091  err_pci_alloc:
6092         IWL_ERROR("failed to allocate pci memory\n");
6093         ret = -ENOMEM;
6094         iwl4965_dealloc_ucode_pci(priv);
6095
6096  err_release:
6097         release_firmware(ucode_raw);
6098
6099  error:
6100         return ret;
6101 }
6102
6103
6104 /**
6105  * iwl4965_set_ucode_ptrs - Set uCode address location
6106  *
6107  * Tell initialization uCode where to find runtime uCode.
6108  *
6109  * BSM registers initially contain pointers to initialization uCode.
6110  * We need to replace them to load runtime uCode inst and data,
6111  * and to save runtime data when powering down.
6112  */
6113 static int iwl4965_set_ucode_ptrs(struct iwl4965_priv *priv)
6114 {
6115         dma_addr_t pinst;
6116         dma_addr_t pdata;
6117         int rc = 0;
6118         unsigned long flags;
6119
6120         /* bits 35:4 for 4965 */
6121         pinst = priv->ucode_code.p_addr >> 4;
6122         pdata = priv->ucode_data_backup.p_addr >> 4;
6123
6124         spin_lock_irqsave(&priv->lock, flags);
6125         rc = iwl4965_grab_nic_access(priv);
6126         if (rc) {
6127                 spin_unlock_irqrestore(&priv->lock, flags);
6128                 return rc;
6129         }
6130
6131         /* Tell bootstrap uCode where to find image to load */
6132         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6133         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6134         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6135                                  priv->ucode_data.len);
6136
6137         /* Inst bytecount must be last to set up, bit 31 signals uCode
6138          *   that all new ptr/size info is in place */
6139         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6140                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6141
6142         iwl4965_release_nic_access(priv);
6143
6144         spin_unlock_irqrestore(&priv->lock, flags);
6145
6146         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6147
6148         return rc;
6149 }
6150
6151 /**
6152  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
6153  *
6154  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6155  *
6156  * The 4965 "initialize" ALIVE reply contains calibration data for:
6157  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6158  *   (3945 does not contain this data).
6159  *
6160  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6161 */
6162 static void iwl4965_init_alive_start(struct iwl4965_priv *priv)
6163 {
6164         /* Check alive response for "valid" sign from uCode */
6165         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6166                 /* We had an error bringing up the hardware, so take it
6167                  * all the way back down so we can try again */
6168                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6169                 goto restart;
6170         }
6171
6172         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6173          * This is a paranoid check, because we would not have gotten the
6174          * "initialize" alive if code weren't properly loaded.  */
6175         if (iwl4965_verify_ucode(priv)) {
6176                 /* Runtime instruction load was bad;
6177                  * take it all the way back down so we can try again */
6178                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6179                 goto restart;
6180         }
6181
6182         /* Calculate temperature */
6183         priv->temperature = iwl4965_get_temperature(priv);
6184
6185         /* Send pointers to protocol/runtime uCode image ... init code will
6186          * load and launch runtime uCode, which will send us another "Alive"
6187          * notification. */
6188         IWL_DEBUG_INFO("Initialization Alive received.\n");
6189         if (iwl4965_set_ucode_ptrs(priv)) {
6190                 /* Runtime instruction load won't happen;
6191                  * take it all the way back down so we can try again */
6192                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6193                 goto restart;
6194         }
6195         return;
6196
6197  restart:
6198         queue_work(priv->workqueue, &priv->restart);
6199 }
6200
6201
6202 /**
6203  * iwl4965_alive_start - called after REPLY_ALIVE notification received
6204  *                   from protocol/runtime uCode (initialization uCode's
6205  *                   Alive gets handled by iwl4965_init_alive_start()).
6206  */
6207 static void iwl4965_alive_start(struct iwl4965_priv *priv)
6208 {
6209         int rc = 0;
6210
6211         IWL_DEBUG_INFO("Runtime Alive received.\n");
6212
6213         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6214                 /* We had an error bringing up the hardware, so take it
6215                  * all the way back down so we can try again */
6216                 IWL_DEBUG_INFO("Alive failed.\n");
6217                 goto restart;
6218         }
6219
6220         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6221          * This is a paranoid check, because we would not have gotten the
6222          * "runtime" alive if code weren't properly loaded.  */
6223         if (iwl4965_verify_ucode(priv)) {
6224                 /* Runtime instruction load was bad;
6225                  * take it all the way back down so we can try again */
6226                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6227                 goto restart;
6228         }
6229
6230         iwl4965_clear_stations_table(priv);
6231
6232         rc = iwl4965_alive_notify(priv);
6233         if (rc) {
6234                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6235                             rc);
6236                 goto restart;
6237         }
6238
6239         /* After the ALIVE response, we can send host commands to 4965 uCode */
6240         set_bit(STATUS_ALIVE, &priv->status);
6241
6242         /* Clear out the uCode error bit if it is set */
6243         clear_bit(STATUS_FW_ERROR, &priv->status);
6244
6245         if (iwl4965_is_rfkill(priv))
6246                 return;
6247
6248         ieee80211_start_queues(priv->hw);
6249
6250         priv->active_rate = priv->rates_mask;
6251         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6252
6253         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6254
6255         if (iwl4965_is_associated(priv)) {
6256                 struct iwl4965_rxon_cmd *active_rxon =
6257                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
6258
6259                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6260                        sizeof(priv->staging_rxon));
6261                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6262         } else {
6263                 /* Initialize our rx_config data */
6264                 iwl4965_connection_init_rx_config(priv);
6265                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6266         }
6267
6268         /* Configure Bluetooth device coexistence support */
6269         iwl4965_send_bt_config(priv);
6270
6271         /* Configure the adapter for unassociated operation */
6272         iwl4965_commit_rxon(priv);
6273
6274         /* At this point, the NIC is initialized and operational */
6275         priv->notif_missed_beacons = 0;
6276         set_bit(STATUS_READY, &priv->status);
6277
6278         iwl4965_rf_kill_ct_config(priv);
6279
6280         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6281         wake_up_interruptible(&priv->wait_command_queue);
6282
6283         if (priv->error_recovering)
6284                 iwl4965_error_recovery(priv);
6285
6286         return;
6287
6288  restart:
6289         queue_work(priv->workqueue, &priv->restart);
6290 }
6291
6292 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv);
6293
6294 static void __iwl4965_down(struct iwl4965_priv *priv)
6295 {
6296         unsigned long flags;
6297         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6298         struct ieee80211_conf *conf = NULL;
6299
6300         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6301
6302         conf = ieee80211_get_hw_conf(priv->hw);
6303
6304         if (!exit_pending)
6305                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6306
6307         iwl4965_clear_stations_table(priv);
6308
6309         /* Unblock any waiting calls */
6310         wake_up_interruptible_all(&priv->wait_command_queue);
6311
6312         /* Wipe out the EXIT_PENDING status bit if we are not actually
6313          * exiting the module */
6314         if (!exit_pending)
6315                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6316
6317         /* stop and reset the on-board processor */
6318         iwl4965_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6319
6320         /* tell the device to stop sending interrupts */
6321         iwl4965_disable_interrupts(priv);
6322
6323         if (priv->mac80211_registered)
6324                 ieee80211_stop_queues(priv->hw);
6325
6326         /* If we have not previously called iwl4965_init() then
6327          * clear all bits but the RF Kill and SUSPEND bits and return */
6328         if (!iwl4965_is_init(priv)) {
6329                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6330                                         STATUS_RF_KILL_HW |
6331                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6332                                         STATUS_RF_KILL_SW |
6333                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6334                                         STATUS_GEO_CONFIGURED |
6335                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6336                                         STATUS_IN_SUSPEND;
6337                 goto exit;
6338         }
6339
6340         /* ...otherwise clear out all the status bits but the RF Kill and
6341          * SUSPEND bits and continue taking the NIC down. */
6342         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6343                                 STATUS_RF_KILL_HW |
6344                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6345                                 STATUS_RF_KILL_SW |
6346                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6347                                 STATUS_GEO_CONFIGURED |
6348                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6349                                 STATUS_IN_SUSPEND |
6350                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6351                                 STATUS_FW_ERROR;
6352
6353         spin_lock_irqsave(&priv->lock, flags);
6354         iwl4965_clear_bit(priv, CSR_GP_CNTRL,
6355                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6356         spin_unlock_irqrestore(&priv->lock, flags);
6357
6358         iwl4965_hw_txq_ctx_stop(priv);
6359         iwl4965_hw_rxq_stop(priv);
6360
6361         spin_lock_irqsave(&priv->lock, flags);
6362         if (!iwl4965_grab_nic_access(priv)) {
6363                 iwl4965_write_prph(priv, APMG_CLK_DIS_REG,
6364                                          APMG_CLK_VAL_DMA_CLK_RQT);
6365                 iwl4965_release_nic_access(priv);
6366         }
6367         spin_unlock_irqrestore(&priv->lock, flags);
6368
6369         udelay(5);
6370
6371         iwl4965_hw_nic_stop_master(priv);
6372         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6373         iwl4965_hw_nic_reset(priv);
6374
6375  exit:
6376         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
6377
6378         if (priv->ibss_beacon)
6379                 dev_kfree_skb(priv->ibss_beacon);
6380         priv->ibss_beacon = NULL;
6381
6382         /* clear out any free frames */
6383         iwl4965_clear_free_frames(priv);
6384 }
6385
6386 static void iwl4965_down(struct iwl4965_priv *priv)
6387 {
6388         mutex_lock(&priv->mutex);
6389         __iwl4965_down(priv);
6390         mutex_unlock(&priv->mutex);
6391
6392         iwl4965_cancel_deferred_work(priv);
6393 }
6394
6395 #define MAX_HW_RESTARTS 5
6396
6397 static int __iwl4965_up(struct iwl4965_priv *priv)
6398 {
6399         int rc, i;
6400
6401         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6402                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6403                 return -EIO;
6404         }
6405
6406         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6407                 IWL_WARNING("Radio disabled by SW RF kill (module "
6408                             "parameter)\n");
6409                 return -ENODEV;
6410         }
6411
6412         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6413                 IWL_ERROR("ucode not available for device bringup\n");
6414                 return -EIO;
6415         }
6416
6417         /* If platform's RF_KILL switch is NOT set to KILL */
6418         if (iwl4965_read32(priv, CSR_GP_CNTRL) &
6419                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6420                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6421         else {
6422                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6423                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6424                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6425                         return -ENODEV;
6426                 }
6427         }
6428
6429         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6430
6431         rc = iwl4965_hw_nic_init(priv);
6432         if (rc) {
6433                 IWL_ERROR("Unable to int nic\n");
6434                 return rc;
6435         }
6436
6437         /* make sure rfkill handshake bits are cleared */
6438         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6439         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6440                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6441
6442         /* clear (again), then enable host interrupts */
6443         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6444         iwl4965_enable_interrupts(priv);
6445
6446         /* really make sure rfkill handshake bits are cleared */
6447         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6448         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6449
6450         /* Copy original ucode data image from disk into backup cache.
6451          * This will be used to initialize the on-board processor's
6452          * data SRAM for a clean start when the runtime program first loads. */
6453         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6454                priv->ucode_data.len);
6455
6456         /* We return success when we resume from suspend and rf_kill is on. */
6457         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6458                 return 0;
6459
6460         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6461
6462                 iwl4965_clear_stations_table(priv);
6463
6464                 /* load bootstrap state machine,
6465                  * load bootstrap program into processor's memory,
6466                  * prepare to load the "initialize" uCode */
6467                 rc = iwl4965_load_bsm(priv);
6468
6469                 if (rc) {
6470                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6471                         continue;
6472                 }
6473
6474                 /* start card; "initialize" will load runtime ucode */
6475                 iwl4965_nic_start(priv);
6476
6477                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6478
6479                 return 0;
6480         }
6481
6482         set_bit(STATUS_EXIT_PENDING, &priv->status);
6483         __iwl4965_down(priv);
6484
6485         /* tried to restart and config the device for as long as our
6486          * patience could withstand */
6487         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6488         return -EIO;
6489 }
6490
6491
6492 /*****************************************************************************
6493  *
6494  * Workqueue callbacks
6495  *
6496  *****************************************************************************/
6497
6498 static void iwl4965_bg_init_alive_start(struct work_struct *data)
6499 {
6500         struct iwl4965_priv *priv =
6501             container_of(data, struct iwl4965_priv, init_alive_start.work);
6502
6503         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6504                 return;
6505
6506         mutex_lock(&priv->mutex);
6507         iwl4965_init_alive_start(priv);
6508         mutex_unlock(&priv->mutex);
6509 }
6510
6511 static void iwl4965_bg_alive_start(struct work_struct *data)
6512 {
6513         struct iwl4965_priv *priv =
6514             container_of(data, struct iwl4965_priv, alive_start.work);
6515
6516         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6517                 return;
6518
6519         mutex_lock(&priv->mutex);
6520         iwl4965_alive_start(priv);
6521         mutex_unlock(&priv->mutex);
6522 }
6523
6524 static void iwl4965_bg_rf_kill(struct work_struct *work)
6525 {
6526         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, rf_kill);
6527
6528         wake_up_interruptible(&priv->wait_command_queue);
6529
6530         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6531                 return;
6532
6533         mutex_lock(&priv->mutex);
6534
6535         if (!iwl4965_is_rfkill(priv)) {
6536                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6537                           "HW and/or SW RF Kill no longer active, restarting "
6538                           "device\n");
6539                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6540                         queue_work(priv->workqueue, &priv->restart);
6541         } else {
6542
6543                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6544                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6545                                           "disabled by SW switch\n");
6546                 else
6547                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6548                                     "Kill switch must be turned off for "
6549                                     "wireless networking to work.\n");
6550         }
6551         mutex_unlock(&priv->mutex);
6552 }
6553
6554 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6555
6556 static void iwl4965_bg_scan_check(struct work_struct *data)
6557 {
6558         struct iwl4965_priv *priv =
6559             container_of(data, struct iwl4965_priv, scan_check.work);
6560
6561         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6562                 return;
6563
6564         mutex_lock(&priv->mutex);
6565         if (test_bit(STATUS_SCANNING, &priv->status) ||
6566             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6567                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6568                           "Scan completion watchdog resetting adapter (%dms)\n",
6569                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6570
6571                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6572                         iwl4965_send_scan_abort(priv);
6573         }
6574         mutex_unlock(&priv->mutex);
6575 }
6576
6577 static void iwl4965_bg_request_scan(struct work_struct *data)
6578 {
6579         struct iwl4965_priv *priv =
6580             container_of(data, struct iwl4965_priv, request_scan);
6581         struct iwl4965_host_cmd cmd = {
6582                 .id = REPLY_SCAN_CMD,
6583                 .len = sizeof(struct iwl4965_scan_cmd),
6584                 .meta.flags = CMD_SIZE_HUGE,
6585         };
6586         int rc = 0;
6587         struct iwl4965_scan_cmd *scan;
6588         struct ieee80211_conf *conf = NULL;
6589         u16 cmd_len;
6590         enum ieee80211_band band;
6591         u8 direct_mask;
6592
6593         conf = ieee80211_get_hw_conf(priv->hw);
6594
6595         mutex_lock(&priv->mutex);
6596
6597         if (!iwl4965_is_ready(priv)) {
6598                 IWL_WARNING("request scan called when driver not ready.\n");
6599                 goto done;
6600         }
6601
6602         /* Make sure the scan wasn't cancelled before this queued work
6603          * was given the chance to run... */
6604         if (!test_bit(STATUS_SCANNING, &priv->status))
6605                 goto done;
6606
6607         /* This should never be called or scheduled if there is currently
6608          * a scan active in the hardware. */
6609         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6610                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6611                                "Ignoring second request.\n");
6612                 rc = -EIO;
6613                 goto done;
6614         }
6615
6616         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6617                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6618                 goto done;
6619         }
6620
6621         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6622                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6623                 goto done;
6624         }
6625
6626         if (iwl4965_is_rfkill(priv)) {
6627                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6628                 goto done;
6629         }
6630
6631         if (!test_bit(STATUS_READY, &priv->status)) {
6632                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6633                 goto done;
6634         }
6635
6636         if (!priv->scan_bands) {
6637                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6638                 goto done;
6639         }
6640
6641         if (!priv->scan) {
6642                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
6643                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6644                 if (!priv->scan) {
6645                         rc = -ENOMEM;
6646                         goto done;
6647                 }
6648         }
6649         scan = priv->scan;
6650         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
6651
6652         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6653         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6654
6655         if (iwl4965_is_associated(priv)) {
6656                 u16 interval = 0;
6657                 u32 extra;
6658                 u32 suspend_time = 100;
6659                 u32 scan_suspend_time = 100;
6660                 unsigned long flags;
6661
6662                 IWL_DEBUG_INFO("Scanning while associated...\n");
6663
6664                 spin_lock_irqsave(&priv->lock, flags);
6665                 interval = priv->beacon_int;
6666                 spin_unlock_irqrestore(&priv->lock, flags);
6667
6668                 scan->suspend_time = 0;
6669                 scan->max_out_time = cpu_to_le32(200 * 1024);
6670                 if (!interval)
6671                         interval = suspend_time;
6672
6673                 extra = (suspend_time / interval) << 22;
6674                 scan_suspend_time = (extra |
6675                     ((suspend_time % interval) * 1024));
6676                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6677                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6678                                scan_suspend_time, interval);
6679         }
6680
6681         /* We should add the ability for user to lock to PASSIVE ONLY */
6682         if (priv->one_direct_scan) {
6683                 IWL_DEBUG_SCAN
6684                     ("Kicking off one direct scan for '%s'\n",
6685                      iwl4965_escape_essid(priv->direct_ssid,
6686                                       priv->direct_ssid_len));
6687                 scan->direct_scan[0].id = WLAN_EID_SSID;
6688                 scan->direct_scan[0].len = priv->direct_ssid_len;
6689                 memcpy(scan->direct_scan[0].ssid,
6690                        priv->direct_ssid, priv->direct_ssid_len);
6691                 direct_mask = 1;
6692         } else if (!iwl4965_is_associated(priv) && priv->essid_len) {
6693                 scan->direct_scan[0].id = WLAN_EID_SSID;
6694                 scan->direct_scan[0].len = priv->essid_len;
6695                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6696                 direct_mask = 1;
6697         } else
6698                 direct_mask = 0;
6699
6700         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6701         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6702         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6703
6704
6705         switch (priv->scan_bands) {
6706         case 2:
6707                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6708                 scan->tx_cmd.rate_n_flags =
6709                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6710                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6711
6712                 scan->good_CRC_th = 0;
6713                 band = IEEE80211_BAND_2GHZ;
6714                 break;
6715
6716         case 1:
6717                 scan->tx_cmd.rate_n_flags =
6718                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6719                                 RATE_MCS_ANT_B_MSK);
6720                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6721                 band = IEEE80211_BAND_5GHZ;
6722                 break;
6723
6724         default:
6725                 IWL_WARNING("Invalid scan band count\n");
6726                 goto done;
6727         }
6728
6729         /* We don't build a direct scan probe request; the uCode will do
6730          * that based on the direct_mask added to each channel entry */
6731         cmd_len = iwl4965_fill_probe_req(priv, band,
6732                                         (struct ieee80211_mgmt *)scan->data,
6733                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
6734
6735         scan->tx_cmd.len = cpu_to_le16(cmd_len);
6736         /* select Rx chains */
6737
6738         /* Force use of chains B and C (0x6) for scan Rx.
6739          * Avoid A (0x1) because of its off-channel reception on A-band.
6740          * MIMO is not used here, but value is required to make uCode happy. */
6741         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
6742                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
6743                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
6744                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
6745
6746         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6747                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6748
6749         if (direct_mask) {
6750                 IWL_DEBUG_SCAN
6751                     ("Initiating direct scan for %s.\n",
6752                      iwl4965_escape_essid(priv->essid, priv->essid_len));
6753                 scan->channel_count =
6754                         iwl4965_get_channels_for_scan(
6755                                 priv, band, 1, /* active */
6756                                 direct_mask,
6757                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6758         } else {
6759                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6760                 scan->channel_count =
6761                         iwl4965_get_channels_for_scan(
6762                                 priv, band, 0, /* passive */
6763                                 direct_mask,
6764                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6765         }
6766
6767         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6768             scan->channel_count * sizeof(struct iwl4965_scan_channel);
6769         cmd.data = scan;
6770         scan->len = cpu_to_le16(cmd.len);
6771
6772         set_bit(STATUS_SCAN_HW, &priv->status);
6773         rc = iwl4965_send_cmd_sync(priv, &cmd);
6774         if (rc)
6775                 goto done;
6776
6777         queue_delayed_work(priv->workqueue, &priv->scan_check,
6778                            IWL_SCAN_CHECK_WATCHDOG);
6779
6780         mutex_unlock(&priv->mutex);
6781         return;
6782
6783  done:
6784         /* inform mac80211 scan aborted */
6785         queue_work(priv->workqueue, &priv->scan_completed);
6786         mutex_unlock(&priv->mutex);
6787 }
6788
6789 static void iwl4965_bg_up(struct work_struct *data)
6790 {
6791         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, up);
6792
6793         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6794                 return;
6795
6796         mutex_lock(&priv->mutex);
6797         __iwl4965_up(priv);
6798         mutex_unlock(&priv->mutex);
6799 }
6800
6801 static void iwl4965_bg_restart(struct work_struct *data)
6802 {
6803         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, restart);
6804
6805         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6806                 return;
6807
6808         iwl4965_down(priv);
6809         queue_work(priv->workqueue, &priv->up);
6810 }
6811
6812 static void iwl4965_bg_rx_replenish(struct work_struct *data)
6813 {
6814         struct iwl4965_priv *priv =
6815             container_of(data, struct iwl4965_priv, rx_replenish);
6816
6817         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6818                 return;
6819
6820         mutex_lock(&priv->mutex);
6821         iwl4965_rx_replenish(priv);
6822         mutex_unlock(&priv->mutex);
6823 }
6824
6825 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6826
6827 static void iwl4965_bg_post_associate(struct work_struct *data)
6828 {
6829         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv,
6830                                              post_associate.work);
6831
6832         int rc = 0;
6833         struct ieee80211_conf *conf = NULL;
6834         DECLARE_MAC_BUF(mac);
6835
6836         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6837                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6838                 return;
6839         }
6840
6841         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6842                         priv->assoc_id,
6843                         print_mac(mac, priv->active_rxon.bssid_addr));
6844
6845
6846         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6847                 return;
6848
6849         mutex_lock(&priv->mutex);
6850
6851         if (!priv->vif || !priv->is_open) {
6852                 mutex_unlock(&priv->mutex);
6853                 return;
6854         }
6855         iwl4965_scan_cancel_timeout(priv, 200);
6856
6857         conf = ieee80211_get_hw_conf(priv->hw);
6858
6859         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6860         iwl4965_commit_rxon(priv);
6861
6862         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6863         iwl4965_setup_rxon_timing(priv);
6864         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6865                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6866         if (rc)
6867                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6868                             "Attempting to continue.\n");
6869
6870         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6871
6872 #ifdef CONFIG_IWL4965_HT
6873         if (priv->current_ht_config.is_ht)
6874                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
6875 #endif /* CONFIG_IWL4965_HT*/
6876         iwl4965_set_rxon_chain(priv);
6877         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6878
6879         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6880                         priv->assoc_id, priv->beacon_int);
6881
6882         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6883                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6884         else
6885                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6886
6887         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6888                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6889                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6890                 else
6891                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6892
6893                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6894                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6895
6896         }
6897
6898         iwl4965_commit_rxon(priv);
6899
6900         switch (priv->iw_mode) {
6901         case IEEE80211_IF_TYPE_STA:
6902                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6903                 break;
6904
6905         case IEEE80211_IF_TYPE_IBSS:
6906
6907                 /* clear out the station table */
6908                 iwl4965_clear_stations_table(priv);
6909
6910                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6911                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6912                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6913                 iwl4965_send_beacon_cmd(priv);
6914
6915                 break;
6916
6917         default:
6918                 IWL_ERROR("%s Should not be called in %d mode\n",
6919                                 __FUNCTION__, priv->iw_mode);
6920                 break;
6921         }
6922
6923         iwl4965_sequence_reset(priv);
6924
6925 #ifdef CONFIG_IWL4965_SENSITIVITY
6926         /* Enable Rx differential gain and sensitivity calibrations */
6927         iwl4965_chain_noise_reset(priv);
6928         priv->start_calib = 1;
6929 #endif /* CONFIG_IWL4965_SENSITIVITY */
6930
6931         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6932                 priv->assoc_station_added = 1;
6933
6934         iwl4965_activate_qos(priv, 0);
6935
6936         /* we have just associated, don't start scan too early */
6937         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6938         mutex_unlock(&priv->mutex);
6939 }
6940
6941 static void iwl4965_bg_abort_scan(struct work_struct *work)
6942 {
6943         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, abort_scan);
6944
6945         if (!iwl4965_is_ready(priv))
6946                 return;
6947
6948         mutex_lock(&priv->mutex);
6949
6950         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6951         iwl4965_send_scan_abort(priv);
6952
6953         mutex_unlock(&priv->mutex);
6954 }
6955
6956 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6957
6958 static void iwl4965_bg_scan_completed(struct work_struct *work)
6959 {
6960         struct iwl4965_priv *priv =
6961             container_of(work, struct iwl4965_priv, scan_completed);
6962
6963         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6964
6965         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6966                 return;
6967
6968         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6969                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6970
6971         ieee80211_scan_completed(priv->hw);
6972
6973         /* Since setting the TXPOWER may have been deferred while
6974          * performing the scan, fire one off */
6975         mutex_lock(&priv->mutex);
6976         iwl4965_hw_reg_send_txpower(priv);
6977         mutex_unlock(&priv->mutex);
6978 }
6979
6980 /*****************************************************************************
6981  *
6982  * mac80211 entry point functions
6983  *
6984  *****************************************************************************/
6985
6986 #define UCODE_READY_TIMEOUT     (2 * HZ)
6987
6988 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6989 {
6990         struct iwl4965_priv *priv = hw->priv;
6991         int ret;
6992
6993         IWL_DEBUG_MAC80211("enter\n");
6994
6995         if (pci_enable_device(priv->pci_dev)) {
6996                 IWL_ERROR("Fail to pci_enable_device\n");
6997                 return -ENODEV;
6998         }
6999         pci_restore_state(priv->pci_dev);
7000         pci_enable_msi(priv->pci_dev);
7001
7002         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
7003                           DRV_NAME, priv);
7004         if (ret) {
7005                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
7006                 goto out_disable_msi;
7007         }
7008
7009         /* we should be verifying the device is ready to be opened */
7010         mutex_lock(&priv->mutex);
7011
7012         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
7013         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
7014          * ucode filename and max sizes are card-specific. */
7015
7016         if (!priv->ucode_code.len) {
7017                 ret = iwl4965_read_ucode(priv);
7018                 if (ret) {
7019                         IWL_ERROR("Could not read microcode: %d\n", ret);
7020                         mutex_unlock(&priv->mutex);
7021                         goto out_release_irq;
7022                 }
7023         }
7024
7025         ret = __iwl4965_up(priv);
7026
7027         mutex_unlock(&priv->mutex);
7028
7029         if (ret)
7030                 goto out_release_irq;
7031
7032         IWL_DEBUG_INFO("Start UP work done.\n");
7033
7034         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
7035                 return 0;
7036
7037         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
7038          * mac80211 will not be run successfully. */
7039         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
7040                         test_bit(STATUS_READY, &priv->status),
7041                         UCODE_READY_TIMEOUT);
7042         if (!ret) {
7043                 if (!test_bit(STATUS_READY, &priv->status)) {
7044                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
7045                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
7046                         ret = -ETIMEDOUT;
7047                         goto out_release_irq;
7048                 }
7049         }
7050
7051         priv->is_open = 1;
7052         IWL_DEBUG_MAC80211("leave\n");
7053         return 0;
7054
7055 out_release_irq:
7056         free_irq(priv->pci_dev->irq, priv);
7057 out_disable_msi:
7058         pci_disable_msi(priv->pci_dev);
7059         pci_disable_device(priv->pci_dev);
7060         priv->is_open = 0;
7061         IWL_DEBUG_MAC80211("leave - failed\n");
7062         return ret;
7063 }
7064
7065 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
7066 {
7067         struct iwl4965_priv *priv = hw->priv;
7068
7069         IWL_DEBUG_MAC80211("enter\n");
7070
7071         if (!priv->is_open) {
7072                 IWL_DEBUG_MAC80211("leave - skip\n");
7073                 return;
7074         }
7075
7076         priv->is_open = 0;
7077
7078         if (iwl4965_is_ready_rf(priv)) {
7079                 /* stop mac, cancel any scan request and clear
7080                  * RXON_FILTER_ASSOC_MSK BIT
7081                  */
7082                 mutex_lock(&priv->mutex);
7083                 iwl4965_scan_cancel_timeout(priv, 100);
7084                 cancel_delayed_work(&priv->post_associate);
7085                 mutex_unlock(&priv->mutex);
7086         }
7087
7088         iwl4965_down(priv);
7089
7090         flush_workqueue(priv->workqueue);
7091         free_irq(priv->pci_dev->irq, priv);
7092         pci_disable_msi(priv->pci_dev);
7093         pci_save_state(priv->pci_dev);
7094         pci_disable_device(priv->pci_dev);
7095
7096         IWL_DEBUG_MAC80211("leave\n");
7097 }
7098
7099 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7100                       struct ieee80211_tx_control *ctl)
7101 {
7102         struct iwl4965_priv *priv = hw->priv;
7103
7104         IWL_DEBUG_MAC80211("enter\n");
7105
7106         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7107                 IWL_DEBUG_MAC80211("leave - monitor\n");
7108                 return -1;
7109         }
7110
7111         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7112                      ctl->tx_rate->bitrate);
7113
7114         if (iwl4965_tx_skb(priv, skb, ctl))
7115                 dev_kfree_skb_any(skb);
7116
7117         IWL_DEBUG_MAC80211("leave\n");
7118         return 0;
7119 }
7120
7121 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
7122                                  struct ieee80211_if_init_conf *conf)
7123 {
7124         struct iwl4965_priv *priv = hw->priv;
7125         unsigned long flags;
7126         DECLARE_MAC_BUF(mac);
7127
7128         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
7129
7130         if (priv->vif) {
7131                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
7132                 return -EOPNOTSUPP;
7133         }
7134
7135         spin_lock_irqsave(&priv->lock, flags);
7136         priv->vif = conf->vif;
7137
7138         spin_unlock_irqrestore(&priv->lock, flags);
7139
7140         mutex_lock(&priv->mutex);
7141
7142         if (conf->mac_addr) {
7143                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7144                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7145         }
7146
7147         if (iwl4965_is_ready(priv))
7148                 iwl4965_set_mode(priv, conf->type);
7149
7150         mutex_unlock(&priv->mutex);
7151
7152         IWL_DEBUG_MAC80211("leave\n");
7153         return 0;
7154 }
7155
7156 /**
7157  * iwl4965_mac_config - mac80211 config callback
7158  *
7159  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7160  * be set inappropriately and the driver currently sets the hardware up to
7161  * use it whenever needed.
7162  */
7163 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7164 {
7165         struct iwl4965_priv *priv = hw->priv;
7166         const struct iwl4965_channel_info *ch_info;
7167         unsigned long flags;
7168         int ret = 0;
7169
7170         mutex_lock(&priv->mutex);
7171         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
7172
7173         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7174
7175         if (!iwl4965_is_ready(priv)) {
7176                 IWL_DEBUG_MAC80211("leave - not ready\n");
7177                 ret = -EIO;
7178                 goto out;
7179         }
7180
7181         if (unlikely(!iwl4965_param_disable_hw_scan &&
7182                      test_bit(STATUS_SCANNING, &priv->status))) {
7183                 IWL_DEBUG_MAC80211("leave - scanning\n");
7184                 set_bit(STATUS_CONF_PENDING, &priv->status);
7185                 mutex_unlock(&priv->mutex);
7186                 return 0;
7187         }
7188
7189         spin_lock_irqsave(&priv->lock, flags);
7190
7191         ch_info = iwl4965_get_channel_info(priv, conf->channel->band,
7192                         ieee80211_frequency_to_channel(conf->channel->center_freq));
7193         if (!is_channel_valid(ch_info)) {
7194                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7195                 spin_unlock_irqrestore(&priv->lock, flags);
7196                 ret = -EINVAL;
7197                 goto out;
7198         }
7199
7200 #ifdef CONFIG_IWL4965_HT
7201         /* if we are switching from ht to 2.4 clear flags
7202          * from any ht related info since 2.4 does not
7203          * support ht */
7204         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
7205 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7206             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7207 #endif
7208         )
7209                 priv->staging_rxon.flags = 0;
7210 #endif /* CONFIG_IWL4965_HT */
7211
7212         iwl4965_set_rxon_channel(priv, conf->channel->band,
7213                 ieee80211_frequency_to_channel(conf->channel->center_freq));
7214
7215         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
7216
7217         /* The list of supported rates and rate mask can be different
7218          * for each band; since the band may have changed, reset
7219          * the rate mask to what mac80211 lists */
7220         iwl4965_set_rate(priv);
7221
7222         spin_unlock_irqrestore(&priv->lock, flags);
7223
7224 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7225         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7226                 iwl4965_hw_channel_switch(priv, conf->channel);
7227                 goto out;
7228         }
7229 #endif
7230
7231         iwl4965_radio_kill_sw(priv, !conf->radio_enabled);
7232
7233         if (!conf->radio_enabled) {
7234                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7235                 goto out;
7236         }
7237
7238         if (iwl4965_is_rfkill(priv)) {
7239                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7240                 ret = -EIO;
7241                 goto out;
7242         }
7243
7244         iwl4965_set_rate(priv);
7245
7246         if (memcmp(&priv->active_rxon,
7247                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7248                 iwl4965_commit_rxon(priv);
7249         else
7250                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7251
7252         IWL_DEBUG_MAC80211("leave\n");
7253
7254 out:
7255         clear_bit(STATUS_CONF_PENDING, &priv->status);
7256         mutex_unlock(&priv->mutex);
7257         return ret;
7258 }
7259
7260 static void iwl4965_config_ap(struct iwl4965_priv *priv)
7261 {
7262         int rc = 0;
7263
7264         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7265                 return;
7266
7267         /* The following should be done only at AP bring up */
7268         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7269
7270                 /* RXON - unassoc (to set timing command) */
7271                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7272                 iwl4965_commit_rxon(priv);
7273
7274                 /* RXON Timing */
7275                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7276                 iwl4965_setup_rxon_timing(priv);
7277                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7278                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7279                 if (rc)
7280                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7281                                         "Attempting to continue.\n");
7282
7283                 iwl4965_set_rxon_chain(priv);
7284
7285                 /* FIXME: what should be the assoc_id for AP? */
7286                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7287                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7288                         priv->staging_rxon.flags |=
7289                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7290                 else
7291                         priv->staging_rxon.flags &=
7292                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7293
7294                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7295                         if (priv->assoc_capability &
7296                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7297                                 priv->staging_rxon.flags |=
7298                                         RXON_FLG_SHORT_SLOT_MSK;
7299                         else
7300                                 priv->staging_rxon.flags &=
7301                                         ~RXON_FLG_SHORT_SLOT_MSK;
7302
7303                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7304                                 priv->staging_rxon.flags &=
7305                                         ~RXON_FLG_SHORT_SLOT_MSK;
7306                 }
7307                 /* restore RXON assoc */
7308                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7309                 iwl4965_commit_rxon(priv);
7310                 iwl4965_activate_qos(priv, 1);
7311                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7312         }
7313         iwl4965_send_beacon_cmd(priv);
7314
7315         /* FIXME - we need to add code here to detect a totally new
7316          * configuration, reset the AP, unassoc, rxon timing, assoc,
7317          * clear sta table, add BCAST sta... */
7318 }
7319
7320 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
7321                                         struct ieee80211_vif *vif,
7322                                     struct ieee80211_if_conf *conf)
7323 {
7324         struct iwl4965_priv *priv = hw->priv;
7325         DECLARE_MAC_BUF(mac);
7326         unsigned long flags;
7327         int rc;
7328
7329         if (conf == NULL)
7330                 return -EIO;
7331
7332         if (priv->vif != vif) {
7333                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7334                 mutex_unlock(&priv->mutex);
7335                 return 0;
7336         }
7337
7338         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7339             (!conf->beacon || !conf->ssid_len)) {
7340                 IWL_DEBUG_MAC80211
7341                     ("Leaving in AP mode because HostAPD is not ready.\n");
7342                 return 0;
7343         }
7344
7345         if (!iwl4965_is_alive(priv))
7346                 return -EAGAIN;
7347
7348         mutex_lock(&priv->mutex);
7349
7350         if (conf->bssid)
7351                 IWL_DEBUG_MAC80211("bssid: %s\n",
7352                                    print_mac(mac, conf->bssid));
7353
7354 /*
7355  * very dubious code was here; the probe filtering flag is never set:
7356  *
7357         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7358             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7359  */
7360
7361         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7362                 if (!conf->bssid) {
7363                         conf->bssid = priv->mac_addr;
7364                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7365                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7366                                            print_mac(mac, conf->bssid));
7367                 }
7368                 if (priv->ibss_beacon)
7369                         dev_kfree_skb(priv->ibss_beacon);
7370
7371                 priv->ibss_beacon = conf->beacon;
7372         }
7373
7374         if (iwl4965_is_rfkill(priv))
7375                 goto done;
7376
7377         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7378             !is_multicast_ether_addr(conf->bssid)) {
7379                 /* If there is currently a HW scan going on in the background
7380                  * then we need to cancel it else the RXON below will fail. */
7381                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
7382                         IWL_WARNING("Aborted scan still in progress "
7383                                     "after 100ms\n");
7384                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7385                         mutex_unlock(&priv->mutex);
7386                         return -EAGAIN;
7387                 }
7388                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7389
7390                 /* TODO: Audit driver for usage of these members and see
7391                  * if mac80211 deprecates them (priv->bssid looks like it
7392                  * shouldn't be there, but I haven't scanned the IBSS code
7393                  * to verify) - jpk */
7394                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7395
7396                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7397                         iwl4965_config_ap(priv);
7398                 else {
7399                         rc = iwl4965_commit_rxon(priv);
7400                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7401                                 iwl4965_rxon_add_station(
7402                                         priv, priv->active_rxon.bssid_addr, 1);
7403                 }
7404
7405         } else {
7406                 iwl4965_scan_cancel_timeout(priv, 100);
7407                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7408                 iwl4965_commit_rxon(priv);
7409         }
7410
7411  done:
7412         spin_lock_irqsave(&priv->lock, flags);
7413         if (!conf->ssid_len)
7414                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7415         else
7416                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7417
7418         priv->essid_len = conf->ssid_len;
7419         spin_unlock_irqrestore(&priv->lock, flags);
7420
7421         IWL_DEBUG_MAC80211("leave\n");
7422         mutex_unlock(&priv->mutex);
7423
7424         return 0;
7425 }
7426
7427 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
7428                                  unsigned int changed_flags,
7429                                  unsigned int *total_flags,
7430                                  int mc_count, struct dev_addr_list *mc_list)
7431 {
7432         /*
7433          * XXX: dummy
7434          * see also iwl4965_connection_init_rx_config
7435          */
7436         *total_flags = 0;
7437 }
7438
7439 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
7440                                      struct ieee80211_if_init_conf *conf)
7441 {
7442         struct iwl4965_priv *priv = hw->priv;
7443
7444         IWL_DEBUG_MAC80211("enter\n");
7445
7446         mutex_lock(&priv->mutex);
7447
7448         if (iwl4965_is_ready_rf(priv)) {
7449                 iwl4965_scan_cancel_timeout(priv, 100);
7450                 cancel_delayed_work(&priv->post_associate);
7451                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7452                 iwl4965_commit_rxon(priv);
7453         }
7454         if (priv->vif == conf->vif) {
7455                 priv->vif = NULL;
7456                 memset(priv->bssid, 0, ETH_ALEN);
7457                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7458                 priv->essid_len = 0;
7459         }
7460         mutex_unlock(&priv->mutex);
7461
7462         IWL_DEBUG_MAC80211("leave\n");
7463
7464 }
7465
7466 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
7467                                      struct ieee80211_vif *vif,
7468                                      struct ieee80211_bss_conf *bss_conf,
7469                                      u32 changes)
7470 {
7471         struct iwl4965_priv *priv = hw->priv;
7472
7473         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
7474                 if (bss_conf->use_short_preamble)
7475                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7476                 else
7477                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7478         }
7479
7480         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
7481                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
7482                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7483                 else
7484                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7485         }
7486
7487         if (changes & BSS_CHANGED_ASSOC) {
7488                 /*
7489                  * TODO:
7490                  * do stuff instead of sniffing assoc resp
7491                  */
7492         }
7493
7494         if (iwl4965_is_associated(priv))
7495                 iwl4965_send_rxon_assoc(priv);
7496 }
7497
7498 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7499 {
7500         int rc = 0;
7501         unsigned long flags;
7502         struct iwl4965_priv *priv = hw->priv;
7503
7504         IWL_DEBUG_MAC80211("enter\n");
7505
7506         mutex_lock(&priv->mutex);
7507         spin_lock_irqsave(&priv->lock, flags);
7508
7509         if (!iwl4965_is_ready_rf(priv)) {
7510                 rc = -EIO;
7511                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7512                 goto out_unlock;
7513         }
7514
7515         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7516                 rc = -EIO;
7517                 IWL_ERROR("ERROR: APs don't scan\n");
7518                 goto out_unlock;
7519         }
7520
7521         /* we don't schedule scan within next_scan_jiffies period */
7522         if (priv->next_scan_jiffies &&
7523                         time_after(priv->next_scan_jiffies, jiffies)) {
7524                 rc = -EAGAIN;
7525                 goto out_unlock;
7526         }
7527         /* if we just finished scan ask for delay */
7528         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7529                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7530                 rc = -EAGAIN;
7531                 goto out_unlock;
7532         }
7533         if (len) {
7534                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7535                                iwl4965_escape_essid(ssid, len), (int)len);
7536
7537                 priv->one_direct_scan = 1;
7538                 priv->direct_ssid_len = (u8)
7539                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7540                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7541         } else
7542                 priv->one_direct_scan = 0;
7543
7544         rc = iwl4965_scan_initiate(priv);
7545
7546         IWL_DEBUG_MAC80211("leave\n");
7547
7548 out_unlock:
7549         spin_unlock_irqrestore(&priv->lock, flags);
7550         mutex_unlock(&priv->mutex);
7551
7552         return rc;
7553 }
7554
7555 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7556                            const u8 *local_addr, const u8 *addr,
7557                            struct ieee80211_key_conf *key)
7558 {
7559         struct iwl4965_priv *priv = hw->priv;
7560         DECLARE_MAC_BUF(mac);
7561         int rc = 0;
7562         u8 sta_id;
7563
7564         IWL_DEBUG_MAC80211("enter\n");
7565
7566         if (!iwl4965_param_hwcrypto) {
7567                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7568                 return -EOPNOTSUPP;
7569         }
7570
7571         if (is_zero_ether_addr(addr))
7572                 /* only support pairwise keys */
7573                 return -EOPNOTSUPP;
7574
7575         sta_id = iwl4965_hw_find_station(priv, addr);
7576         if (sta_id == IWL_INVALID_STATION) {
7577                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7578                                    print_mac(mac, addr));
7579                 return -EINVAL;
7580         }
7581
7582         mutex_lock(&priv->mutex);
7583
7584         iwl4965_scan_cancel_timeout(priv, 100);
7585
7586         switch (cmd) {
7587         case  SET_KEY:
7588                 rc = iwl4965_update_sta_key_info(priv, key, sta_id);
7589                 if (!rc) {
7590                         iwl4965_set_rxon_hwcrypto(priv, 1);
7591                         iwl4965_commit_rxon(priv);
7592                         key->hw_key_idx = sta_id;
7593                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7594                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7595                 }
7596                 break;
7597         case DISABLE_KEY:
7598                 rc = iwl4965_clear_sta_key_info(priv, sta_id);
7599                 if (!rc) {
7600                         iwl4965_set_rxon_hwcrypto(priv, 0);
7601                         iwl4965_commit_rxon(priv);
7602                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7603                 }
7604                 break;
7605         default:
7606                 rc = -EINVAL;
7607         }
7608
7609         IWL_DEBUG_MAC80211("leave\n");
7610         mutex_unlock(&priv->mutex);
7611
7612         return rc;
7613 }
7614
7615 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7616                            const struct ieee80211_tx_queue_params *params)
7617 {
7618         struct iwl4965_priv *priv = hw->priv;
7619         unsigned long flags;
7620         int q;
7621
7622         IWL_DEBUG_MAC80211("enter\n");
7623
7624         if (!iwl4965_is_ready_rf(priv)) {
7625                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7626                 return -EIO;
7627         }
7628
7629         if (queue >= AC_NUM) {
7630                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7631                 return 0;
7632         }
7633
7634         if (!priv->qos_data.qos_enable) {
7635                 priv->qos_data.qos_active = 0;
7636                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7637                 return 0;
7638         }
7639         q = AC_NUM - 1 - queue;
7640
7641         spin_lock_irqsave(&priv->lock, flags);
7642
7643         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7644         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7645         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7646         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7647                         cpu_to_le16((params->txop * 32));
7648
7649         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7650         priv->qos_data.qos_active = 1;
7651
7652         spin_unlock_irqrestore(&priv->lock, flags);
7653
7654         mutex_lock(&priv->mutex);
7655         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7656                 iwl4965_activate_qos(priv, 1);
7657         else if (priv->assoc_id && iwl4965_is_associated(priv))
7658                 iwl4965_activate_qos(priv, 0);
7659
7660         mutex_unlock(&priv->mutex);
7661
7662         IWL_DEBUG_MAC80211("leave\n");
7663         return 0;
7664 }
7665
7666 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
7667                                 struct ieee80211_tx_queue_stats *stats)
7668 {
7669         struct iwl4965_priv *priv = hw->priv;
7670         int i, avail;
7671         struct iwl4965_tx_queue *txq;
7672         struct iwl4965_queue *q;
7673         unsigned long flags;
7674
7675         IWL_DEBUG_MAC80211("enter\n");
7676
7677         if (!iwl4965_is_ready_rf(priv)) {
7678                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7679                 return -EIO;
7680         }
7681
7682         spin_lock_irqsave(&priv->lock, flags);
7683
7684         for (i = 0; i < AC_NUM; i++) {
7685                 txq = &priv->txq[i];
7686                 q = &txq->q;
7687                 avail = iwl4965_queue_space(q);
7688
7689                 stats->data[i].len = q->n_window - avail;
7690                 stats->data[i].limit = q->n_window - q->high_mark;
7691                 stats->data[i].count = q->n_window;
7692
7693         }
7694         spin_unlock_irqrestore(&priv->lock, flags);
7695
7696         IWL_DEBUG_MAC80211("leave\n");
7697
7698         return 0;
7699 }
7700
7701 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
7702                              struct ieee80211_low_level_stats *stats)
7703 {
7704         IWL_DEBUG_MAC80211("enter\n");
7705         IWL_DEBUG_MAC80211("leave\n");
7706
7707         return 0;
7708 }
7709
7710 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
7711 {
7712         IWL_DEBUG_MAC80211("enter\n");
7713         IWL_DEBUG_MAC80211("leave\n");
7714
7715         return 0;
7716 }
7717
7718 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7719 {
7720         struct iwl4965_priv *priv = hw->priv;
7721         unsigned long flags;
7722
7723         mutex_lock(&priv->mutex);
7724         IWL_DEBUG_MAC80211("enter\n");
7725
7726         priv->lq_mngr.lq_ready = 0;
7727 #ifdef CONFIG_IWL4965_HT
7728         spin_lock_irqsave(&priv->lock, flags);
7729         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7730         spin_unlock_irqrestore(&priv->lock, flags);
7731 #endif /* CONFIG_IWL4965_HT */
7732
7733         iwl4965_reset_qos(priv);
7734
7735         cancel_delayed_work(&priv->post_associate);
7736
7737         spin_lock_irqsave(&priv->lock, flags);
7738         priv->assoc_id = 0;
7739         priv->assoc_capability = 0;
7740         priv->call_post_assoc_from_beacon = 0;
7741         priv->assoc_station_added = 0;
7742
7743         /* new association get rid of ibss beacon skb */
7744         if (priv->ibss_beacon)
7745                 dev_kfree_skb(priv->ibss_beacon);
7746
7747         priv->ibss_beacon = NULL;
7748
7749         priv->beacon_int = priv->hw->conf.beacon_int;
7750         priv->timestamp1 = 0;
7751         priv->timestamp0 = 0;
7752         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7753                 priv->beacon_int = 0;
7754
7755         spin_unlock_irqrestore(&priv->lock, flags);
7756
7757         if (!iwl4965_is_ready_rf(priv)) {
7758                 IWL_DEBUG_MAC80211("leave - not ready\n");
7759                 mutex_unlock(&priv->mutex);
7760                 return;
7761         }
7762
7763         /* we are restarting association process
7764          * clear RXON_FILTER_ASSOC_MSK bit
7765          */
7766         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7767                 iwl4965_scan_cancel_timeout(priv, 100);
7768                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7769                 iwl4965_commit_rxon(priv);
7770         }
7771
7772         /* Per mac80211.h: This is only used in IBSS mode... */
7773         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7774
7775                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7776                 mutex_unlock(&priv->mutex);
7777                 return;
7778         }
7779
7780         priv->only_active_channel = 0;
7781
7782         iwl4965_set_rate(priv);
7783
7784         mutex_unlock(&priv->mutex);
7785
7786         IWL_DEBUG_MAC80211("leave\n");
7787 }
7788
7789 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7790                                  struct ieee80211_tx_control *control)
7791 {
7792         struct iwl4965_priv *priv = hw->priv;
7793         unsigned long flags;
7794
7795         mutex_lock(&priv->mutex);
7796         IWL_DEBUG_MAC80211("enter\n");
7797
7798         if (!iwl4965_is_ready_rf(priv)) {
7799                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7800                 mutex_unlock(&priv->mutex);
7801                 return -EIO;
7802         }
7803
7804         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7805                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7806                 mutex_unlock(&priv->mutex);
7807                 return -EIO;
7808         }
7809
7810         spin_lock_irqsave(&priv->lock, flags);
7811
7812         if (priv->ibss_beacon)
7813                 dev_kfree_skb(priv->ibss_beacon);
7814
7815         priv->ibss_beacon = skb;
7816
7817         priv->assoc_id = 0;
7818
7819         IWL_DEBUG_MAC80211("leave\n");
7820         spin_unlock_irqrestore(&priv->lock, flags);
7821
7822         iwl4965_reset_qos(priv);
7823
7824         queue_work(priv->workqueue, &priv->post_associate.work);
7825
7826         mutex_unlock(&priv->mutex);
7827
7828         return 0;
7829 }
7830
7831 #ifdef CONFIG_IWL4965_HT
7832
7833 static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
7834                                  struct iwl4965_priv *priv)
7835 {
7836         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
7837         struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
7838         struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
7839
7840         IWL_DEBUG_MAC80211("enter: \n");
7841
7842         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
7843                 iwl_conf->is_ht = 0;
7844                 return;
7845         }
7846
7847         iwl_conf->is_ht = 1;
7848         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
7849
7850         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
7851                 iwl_conf->sgf |= 0x1;
7852         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
7853                 iwl_conf->sgf |= 0x2;
7854
7855         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
7856         iwl_conf->max_amsdu_size =
7857                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
7858
7859         iwl_conf->supported_chan_width =
7860                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
7861         iwl_conf->extension_chan_offset =
7862                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
7863         /* If no above or below channel supplied disable FAT channel */
7864         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
7865             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
7866                 iwl_conf->supported_chan_width = 0;
7867
7868         iwl_conf->tx_mimo_ps_mode =
7869                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
7870         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
7871
7872         iwl_conf->control_channel = ht_bss_conf->primary_channel;
7873         iwl_conf->tx_chan_width =
7874                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
7875         iwl_conf->ht_protection =
7876                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
7877         iwl_conf->non_GF_STA_present =
7878                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
7879
7880         IWL_DEBUG_MAC80211("control channel %d\n",
7881                 iwl_conf->control_channel);
7882         IWL_DEBUG_MAC80211("leave\n");
7883 }
7884
7885 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
7886                                struct ieee80211_conf *conf)
7887 {
7888         struct iwl4965_priv *priv = hw->priv;
7889
7890         IWL_DEBUG_MAC80211("enter: \n");
7891
7892         iwl4965_ht_info_fill(conf, priv);
7893         iwl4965_set_rxon_chain(priv);
7894
7895         if (priv && priv->assoc_id &&
7896             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
7897                 unsigned long flags;
7898
7899                 spin_lock_irqsave(&priv->lock, flags);
7900                 if (priv->beacon_int)
7901                         queue_work(priv->workqueue, &priv->post_associate.work);
7902                 else
7903                         priv->call_post_assoc_from_beacon = 1;
7904                 spin_unlock_irqrestore(&priv->lock, flags);
7905         }
7906
7907         IWL_DEBUG_MAC80211("leave:\n");
7908         return 0;
7909 }
7910
7911 #endif /*CONFIG_IWL4965_HT*/
7912
7913 /*****************************************************************************
7914  *
7915  * sysfs attributes
7916  *
7917  *****************************************************************************/
7918
7919 #ifdef CONFIG_IWL4965_DEBUG
7920
7921 /*
7922  * The following adds a new attribute to the sysfs representation
7923  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7924  * used for controlling the debug level.
7925  *
7926  * See the level definitions in iwl for details.
7927  */
7928
7929 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7930 {
7931         return sprintf(buf, "0x%08X\n", iwl4965_debug_level);
7932 }
7933 static ssize_t store_debug_level(struct device_driver *d,
7934                                  const char *buf, size_t count)
7935 {
7936         char *p = (char *)buf;
7937         u32 val;
7938
7939         val = simple_strtoul(p, &p, 0);
7940         if (p == buf)
7941                 printk(KERN_INFO DRV_NAME
7942                        ": %s is not in hex or decimal form.\n", buf);
7943         else
7944                 iwl4965_debug_level = val;
7945
7946         return strnlen(buf, count);
7947 }
7948
7949 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7950                    show_debug_level, store_debug_level);
7951
7952 #endif /* CONFIG_IWL4965_DEBUG */
7953
7954 static ssize_t show_rf_kill(struct device *d,
7955                             struct device_attribute *attr, char *buf)
7956 {
7957         /*
7958          * 0 - RF kill not enabled
7959          * 1 - SW based RF kill active (sysfs)
7960          * 2 - HW based RF kill active
7961          * 3 - Both HW and SW based RF kill active
7962          */
7963         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
7964         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
7965                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
7966
7967         return sprintf(buf, "%i\n", val);
7968 }
7969
7970 static ssize_t store_rf_kill(struct device *d,
7971                              struct device_attribute *attr,
7972                              const char *buf, size_t count)
7973 {
7974         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
7975
7976         mutex_lock(&priv->mutex);
7977         iwl4965_radio_kill_sw(priv, buf[0] == '1');
7978         mutex_unlock(&priv->mutex);
7979
7980         return count;
7981 }
7982
7983 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
7984
7985 static ssize_t show_temperature(struct device *d,
7986                                 struct device_attribute *attr, char *buf)
7987 {
7988         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
7989
7990         if (!iwl4965_is_alive(priv))
7991                 return -EAGAIN;
7992
7993         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7994 }
7995
7996 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7997
7998 static ssize_t show_rs_window(struct device *d,
7999                               struct device_attribute *attr,
8000                               char *buf)
8001 {
8002         struct iwl4965_priv *priv = d->driver_data;
8003         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8004 }
8005 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8006
8007 static ssize_t show_tx_power(struct device *d,
8008                              struct device_attribute *attr, char *buf)
8009 {
8010         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8011         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8012 }
8013
8014 static ssize_t store_tx_power(struct device *d,
8015                               struct device_attribute *attr,
8016                               const char *buf, size_t count)
8017 {
8018         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8019         char *p = (char *)buf;
8020         u32 val;
8021
8022         val = simple_strtoul(p, &p, 10);
8023         if (p == buf)
8024                 printk(KERN_INFO DRV_NAME
8025                        ": %s is not in decimal form.\n", buf);
8026         else
8027                 iwl4965_hw_reg_set_txpower(priv, val);
8028
8029         return count;
8030 }
8031
8032 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8033
8034 static ssize_t show_flags(struct device *d,
8035                           struct device_attribute *attr, char *buf)
8036 {
8037         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8038
8039         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8040 }
8041
8042 static ssize_t store_flags(struct device *d,
8043                            struct device_attribute *attr,
8044                            const char *buf, size_t count)
8045 {
8046         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8047         u32 flags = simple_strtoul(buf, NULL, 0);
8048
8049         mutex_lock(&priv->mutex);
8050         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8051                 /* Cancel any currently running scans... */
8052                 if (iwl4965_scan_cancel_timeout(priv, 100))
8053                         IWL_WARNING("Could not cancel scan.\n");
8054                 else {
8055                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8056                                        flags);
8057                         priv->staging_rxon.flags = cpu_to_le32(flags);
8058                         iwl4965_commit_rxon(priv);
8059                 }
8060         }
8061         mutex_unlock(&priv->mutex);
8062
8063         return count;
8064 }
8065
8066 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8067
8068 static ssize_t show_filter_flags(struct device *d,
8069                                  struct device_attribute *attr, char *buf)
8070 {
8071         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8072
8073         return sprintf(buf, "0x%04X\n",
8074                 le32_to_cpu(priv->active_rxon.filter_flags));
8075 }
8076
8077 static ssize_t store_filter_flags(struct device *d,
8078                                   struct device_attribute *attr,
8079                                   const char *buf, size_t count)
8080 {
8081         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8082         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8083
8084         mutex_lock(&priv->mutex);
8085         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8086                 /* Cancel any currently running scans... */
8087                 if (iwl4965_scan_cancel_timeout(priv, 100))
8088                         IWL_WARNING("Could not cancel scan.\n");
8089                 else {
8090                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8091                                        "0x%04X\n", filter_flags);
8092                         priv->staging_rxon.filter_flags =
8093                                 cpu_to_le32(filter_flags);
8094                         iwl4965_commit_rxon(priv);
8095                 }
8096         }
8097         mutex_unlock(&priv->mutex);
8098
8099         return count;
8100 }
8101
8102 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8103                    store_filter_flags);
8104
8105 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8106
8107 static ssize_t show_measurement(struct device *d,
8108                                 struct device_attribute *attr, char *buf)
8109 {
8110         struct iwl4965_priv *priv = dev_get_drvdata(d);
8111         struct iwl4965_spectrum_notification measure_report;
8112         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8113         u8 *data = (u8 *) & measure_report;
8114         unsigned long flags;
8115
8116         spin_lock_irqsave(&priv->lock, flags);
8117         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8118                 spin_unlock_irqrestore(&priv->lock, flags);
8119                 return 0;
8120         }
8121         memcpy(&measure_report, &priv->measure_report, size);
8122         priv->measurement_status = 0;
8123         spin_unlock_irqrestore(&priv->lock, flags);
8124
8125         while (size && (PAGE_SIZE - len)) {
8126                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8127                                    PAGE_SIZE - len, 1);
8128                 len = strlen(buf);
8129                 if (PAGE_SIZE - len)
8130                         buf[len++] = '\n';
8131
8132                 ofs += 16;
8133                 size -= min(size, 16U);
8134         }
8135
8136         return len;
8137 }
8138
8139 static ssize_t store_measurement(struct device *d,
8140                                  struct device_attribute *attr,
8141                                  const char *buf, size_t count)
8142 {
8143         struct iwl4965_priv *priv = dev_get_drvdata(d);
8144         struct ieee80211_measurement_params params = {
8145                 .channel = le16_to_cpu(priv->active_rxon.channel),
8146                 .start_time = cpu_to_le64(priv->last_tsf),
8147                 .duration = cpu_to_le16(1),
8148         };
8149         u8 type = IWL_MEASURE_BASIC;
8150         u8 buffer[32];
8151         u8 channel;
8152
8153         if (count) {
8154                 char *p = buffer;
8155                 strncpy(buffer, buf, min(sizeof(buffer), count));
8156                 channel = simple_strtoul(p, NULL, 0);
8157                 if (channel)
8158                         params.channel = channel;
8159
8160                 p = buffer;
8161                 while (*p && *p != ' ')
8162                         p++;
8163                 if (*p)
8164                         type = simple_strtoul(p + 1, NULL, 0);
8165         }
8166
8167         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8168                        "channel %d (for '%s')\n", type, params.channel, buf);
8169         iwl4965_get_measurement(priv, &params, type);
8170
8171         return count;
8172 }
8173
8174 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8175                    show_measurement, store_measurement);
8176 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
8177
8178 static ssize_t store_retry_rate(struct device *d,
8179                                 struct device_attribute *attr,
8180                                 const char *buf, size_t count)
8181 {
8182         struct iwl4965_priv *priv = dev_get_drvdata(d);
8183
8184         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8185         if (priv->retry_rate <= 0)
8186                 priv->retry_rate = 1;
8187
8188         return count;
8189 }
8190
8191 static ssize_t show_retry_rate(struct device *d,
8192                                struct device_attribute *attr, char *buf)
8193 {
8194         struct iwl4965_priv *priv = dev_get_drvdata(d);
8195         return sprintf(buf, "%d", priv->retry_rate);
8196 }
8197
8198 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8199                    store_retry_rate);
8200
8201 static ssize_t store_power_level(struct device *d,
8202                                  struct device_attribute *attr,
8203                                  const char *buf, size_t count)
8204 {
8205         struct iwl4965_priv *priv = dev_get_drvdata(d);
8206         int rc;
8207         int mode;
8208
8209         mode = simple_strtoul(buf, NULL, 0);
8210         mutex_lock(&priv->mutex);
8211
8212         if (!iwl4965_is_ready(priv)) {
8213                 rc = -EAGAIN;
8214                 goto out;
8215         }
8216
8217         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8218                 mode = IWL_POWER_AC;
8219         else
8220                 mode |= IWL_POWER_ENABLED;
8221
8222         if (mode != priv->power_mode) {
8223                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8224                 if (rc) {
8225                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8226                         goto out;
8227                 }
8228                 priv->power_mode = mode;
8229         }
8230
8231         rc = count;
8232
8233  out:
8234         mutex_unlock(&priv->mutex);
8235         return rc;
8236 }
8237
8238 #define MAX_WX_STRING 80
8239
8240 /* Values are in microsecond */
8241 static const s32 timeout_duration[] = {
8242         350000,
8243         250000,
8244         75000,
8245         37000,
8246         25000,
8247 };
8248 static const s32 period_duration[] = {
8249         400000,
8250         700000,
8251         1000000,
8252         1000000,
8253         1000000
8254 };
8255
8256 static ssize_t show_power_level(struct device *d,
8257                                 struct device_attribute *attr, char *buf)
8258 {
8259         struct iwl4965_priv *priv = dev_get_drvdata(d);
8260         int level = IWL_POWER_LEVEL(priv->power_mode);
8261         char *p = buf;
8262
8263         p += sprintf(p, "%d ", level);
8264         switch (level) {
8265         case IWL_POWER_MODE_CAM:
8266         case IWL_POWER_AC:
8267                 p += sprintf(p, "(AC)");
8268                 break;
8269         case IWL_POWER_BATTERY:
8270                 p += sprintf(p, "(BATTERY)");
8271                 break;
8272         default:
8273                 p += sprintf(p,
8274                              "(Timeout %dms, Period %dms)",
8275                              timeout_duration[level - 1] / 1000,
8276                              period_duration[level - 1] / 1000);
8277         }
8278
8279         if (!(priv->power_mode & IWL_POWER_ENABLED))
8280                 p += sprintf(p, " OFF\n");
8281         else
8282                 p += sprintf(p, " \n");
8283
8284         return (p - buf + 1);
8285
8286 }
8287
8288 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8289                    store_power_level);
8290
8291 static ssize_t show_channels(struct device *d,
8292                              struct device_attribute *attr, char *buf)
8293 {
8294         /* all this shit doesn't belong into sysfs anyway */
8295         return 0;
8296 }
8297
8298 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8299
8300 static ssize_t show_statistics(struct device *d,
8301                                struct device_attribute *attr, char *buf)
8302 {
8303         struct iwl4965_priv *priv = dev_get_drvdata(d);
8304         u32 size = sizeof(struct iwl4965_notif_statistics);
8305         u32 len = 0, ofs = 0;
8306         u8 *data = (u8 *) & priv->statistics;
8307         int rc = 0;
8308
8309         if (!iwl4965_is_alive(priv))
8310                 return -EAGAIN;
8311
8312         mutex_lock(&priv->mutex);
8313         rc = iwl4965_send_statistics_request(priv);
8314         mutex_unlock(&priv->mutex);
8315
8316         if (rc) {
8317                 len = sprintf(buf,
8318                               "Error sending statistics request: 0x%08X\n", rc);
8319                 return len;
8320         }
8321
8322         while (size && (PAGE_SIZE - len)) {
8323                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8324                                    PAGE_SIZE - len, 1);
8325                 len = strlen(buf);
8326                 if (PAGE_SIZE - len)
8327                         buf[len++] = '\n';
8328
8329                 ofs += 16;
8330                 size -= min(size, 16U);
8331         }
8332
8333         return len;
8334 }
8335
8336 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8337
8338 static ssize_t show_antenna(struct device *d,
8339                             struct device_attribute *attr, char *buf)
8340 {
8341         struct iwl4965_priv *priv = dev_get_drvdata(d);
8342
8343         if (!iwl4965_is_alive(priv))
8344                 return -EAGAIN;
8345
8346         return sprintf(buf, "%d\n", priv->antenna);
8347 }
8348
8349 static ssize_t store_antenna(struct device *d,
8350                              struct device_attribute *attr,
8351                              const char *buf, size_t count)
8352 {
8353         int ant;
8354         struct iwl4965_priv *priv = dev_get_drvdata(d);
8355
8356         if (count == 0)
8357                 return 0;
8358
8359         if (sscanf(buf, "%1i", &ant) != 1) {
8360                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8361                 return count;
8362         }
8363
8364         if ((ant >= 0) && (ant <= 2)) {
8365                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8366                 priv->antenna = (enum iwl4965_antenna)ant;
8367         } else
8368                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8369
8370
8371         return count;
8372 }
8373
8374 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8375
8376 static ssize_t show_status(struct device *d,
8377                            struct device_attribute *attr, char *buf)
8378 {
8379         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8380         if (!iwl4965_is_alive(priv))
8381                 return -EAGAIN;
8382         return sprintf(buf, "0x%08x\n", (int)priv->status);
8383 }
8384
8385 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8386
8387 static ssize_t dump_error_log(struct device *d,
8388                               struct device_attribute *attr,
8389                               const char *buf, size_t count)
8390 {
8391         char *p = (char *)buf;
8392
8393         if (p[0] == '1')
8394                 iwl4965_dump_nic_error_log((struct iwl4965_priv *)d->driver_data);
8395
8396         return strnlen(buf, count);
8397 }
8398
8399 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8400
8401 static ssize_t dump_event_log(struct device *d,
8402                               struct device_attribute *attr,
8403                               const char *buf, size_t count)
8404 {
8405         char *p = (char *)buf;
8406
8407         if (p[0] == '1')
8408                 iwl4965_dump_nic_event_log((struct iwl4965_priv *)d->driver_data);
8409
8410         return strnlen(buf, count);
8411 }
8412
8413 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8414
8415 /*****************************************************************************
8416  *
8417  * driver setup and teardown
8418  *
8419  *****************************************************************************/
8420
8421 static void iwl4965_setup_deferred_work(struct iwl4965_priv *priv)
8422 {
8423         priv->workqueue = create_workqueue(DRV_NAME);
8424
8425         init_waitqueue_head(&priv->wait_command_queue);
8426
8427         INIT_WORK(&priv->up, iwl4965_bg_up);
8428         INIT_WORK(&priv->restart, iwl4965_bg_restart);
8429         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
8430         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
8431         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
8432         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
8433         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
8434         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
8435         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
8436         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
8437         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
8438         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
8439
8440         iwl4965_hw_setup_deferred_work(priv);
8441
8442         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8443                      iwl4965_irq_tasklet, (unsigned long)priv);
8444 }
8445
8446 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv)
8447 {
8448         iwl4965_hw_cancel_deferred_work(priv);
8449
8450         cancel_delayed_work_sync(&priv->init_alive_start);
8451         cancel_delayed_work(&priv->scan_check);
8452         cancel_delayed_work(&priv->alive_start);
8453         cancel_delayed_work(&priv->post_associate);
8454         cancel_work_sync(&priv->beacon_update);
8455 }
8456
8457 static struct attribute *iwl4965_sysfs_entries[] = {
8458         &dev_attr_antenna.attr,
8459         &dev_attr_channels.attr,
8460         &dev_attr_dump_errors.attr,
8461         &dev_attr_dump_events.attr,
8462         &dev_attr_flags.attr,
8463         &dev_attr_filter_flags.attr,
8464 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8465         &dev_attr_measurement.attr,
8466 #endif
8467         &dev_attr_power_level.attr,
8468         &dev_attr_retry_rate.attr,
8469         &dev_attr_rf_kill.attr,
8470         &dev_attr_rs_window.attr,
8471         &dev_attr_statistics.attr,
8472         &dev_attr_status.attr,
8473         &dev_attr_temperature.attr,
8474         &dev_attr_tx_power.attr,
8475
8476         NULL
8477 };
8478
8479 static struct attribute_group iwl4965_attribute_group = {
8480         .name = NULL,           /* put in device directory */
8481         .attrs = iwl4965_sysfs_entries,
8482 };
8483
8484 static struct ieee80211_ops iwl4965_hw_ops = {
8485         .tx = iwl4965_mac_tx,
8486         .start = iwl4965_mac_start,
8487         .stop = iwl4965_mac_stop,
8488         .add_interface = iwl4965_mac_add_interface,
8489         .remove_interface = iwl4965_mac_remove_interface,
8490         .config = iwl4965_mac_config,
8491         .config_interface = iwl4965_mac_config_interface,
8492         .configure_filter = iwl4965_configure_filter,
8493         .set_key = iwl4965_mac_set_key,
8494         .get_stats = iwl4965_mac_get_stats,
8495         .get_tx_stats = iwl4965_mac_get_tx_stats,
8496         .conf_tx = iwl4965_mac_conf_tx,
8497         .get_tsf = iwl4965_mac_get_tsf,
8498         .reset_tsf = iwl4965_mac_reset_tsf,
8499         .beacon_update = iwl4965_mac_beacon_update,
8500         .bss_info_changed = iwl4965_bss_info_changed,
8501 #ifdef CONFIG_IWL4965_HT
8502         .conf_ht = iwl4965_mac_conf_ht,
8503         .ampdu_action = iwl4965_mac_ampdu_action,
8504 #endif  /* CONFIG_IWL4965_HT */
8505         .hw_scan = iwl4965_mac_hw_scan
8506 };
8507
8508 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8509 {
8510         int err = 0;
8511         struct iwl4965_priv *priv;
8512         struct ieee80211_hw *hw;
8513         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
8514         int i;
8515         DECLARE_MAC_BUF(mac);
8516
8517         /* Disabling hardware scan means that mac80211 will perform scans
8518          * "the hard way", rather than using device's scan. */
8519         if (iwl4965_param_disable_hw_scan) {
8520                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8521                 iwl4965_hw_ops.hw_scan = NULL;
8522         }
8523
8524         if ((iwl4965_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8525             (iwl4965_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8526                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8527                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8528                 err = -EINVAL;
8529                 goto out;
8530         }
8531
8532         /* mac80211 allocates memory for this device instance, including
8533          *   space for this driver's private structure */
8534         hw = ieee80211_alloc_hw(sizeof(struct iwl4965_priv), &iwl4965_hw_ops);
8535         if (hw == NULL) {
8536                 IWL_ERROR("Can not allocate network device\n");
8537                 err = -ENOMEM;
8538                 goto out;
8539         }
8540         SET_IEEE80211_DEV(hw, &pdev->dev);
8541
8542         hw->rate_control_algorithm = "iwl-4965-rs";
8543
8544         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8545         priv = hw->priv;
8546         priv->hw = hw;
8547         priv->cfg = cfg;
8548
8549         priv->pci_dev = pdev;
8550         priv->antenna = (enum iwl4965_antenna)iwl4965_param_antenna;
8551 #ifdef CONFIG_IWL4965_DEBUG
8552         iwl4965_debug_level = iwl4965_param_debug;
8553         atomic_set(&priv->restrict_refcnt, 0);
8554 #endif
8555         priv->retry_rate = 1;
8556
8557         priv->ibss_beacon = NULL;
8558
8559         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8560          *   the range of signal quality values that we'll provide.
8561          * Negative values for level/noise indicate that we'll provide dBm.
8562          * For WE, at least, non-0 values here *enable* display of values
8563          *   in app (iwconfig). */
8564         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8565         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8566         hw->max_signal = 100;   /* link quality indication (%) */
8567
8568         /* Tell mac80211 our Tx characteristics */
8569         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8570
8571         /* Default value; 4 EDCA QOS priorities */
8572         hw->queues = 4;
8573 #ifdef CONFIG_IWL4965_HT
8574         /* Enhanced value; more queues, to support 11n aggregation */
8575         hw->queues = 16;
8576 #endif /* CONFIG_IWL4965_HT */
8577
8578         spin_lock_init(&priv->lock);
8579         spin_lock_init(&priv->power_data.lock);
8580         spin_lock_init(&priv->sta_lock);
8581         spin_lock_init(&priv->hcmd_lock);
8582         spin_lock_init(&priv->lq_mngr.lock);
8583
8584         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8585                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8586
8587         INIT_LIST_HEAD(&priv->free_frames);
8588
8589         mutex_init(&priv->mutex);
8590         if (pci_enable_device(pdev)) {
8591                 err = -ENODEV;
8592                 goto out_ieee80211_free_hw;
8593         }
8594
8595         pci_set_master(pdev);
8596
8597         /* Clear the driver's (not device's) station table */
8598         iwl4965_clear_stations_table(priv);
8599
8600         priv->data_retry_limit = -1;
8601         priv->ieee_channels = NULL;
8602         priv->ieee_rates = NULL;
8603         priv->band = IEEE80211_BAND_2GHZ;
8604
8605         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8606         if (!err)
8607                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8608         if (err) {
8609                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8610                 goto out_pci_disable_device;
8611         }
8612
8613         pci_set_drvdata(pdev, priv);
8614         err = pci_request_regions(pdev, DRV_NAME);
8615         if (err)
8616                 goto out_pci_disable_device;
8617
8618         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8619          * PCI Tx retries from interfering with C3 CPU state */
8620         pci_write_config_byte(pdev, 0x41, 0x00);
8621
8622         priv->hw_base = pci_iomap(pdev, 0, 0);
8623         if (!priv->hw_base) {
8624                 err = -ENODEV;
8625                 goto out_pci_release_regions;
8626         }
8627
8628         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8629                         (unsigned long long) pci_resource_len(pdev, 0));
8630         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8631
8632         /* Initialize module parameter values here */
8633
8634         /* Disable radio (SW RF KILL) via parameter when loading driver */
8635         if (iwl4965_param_disable) {
8636                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8637                 IWL_DEBUG_INFO("Radio disabled.\n");
8638         }
8639
8640         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8641
8642         priv->ps_mode = 0;
8643         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
8644         priv->valid_antenna = 0x7;      /* assume all 3 connected */
8645         priv->ps_mode = IWL_MIMO_PS_NONE;
8646
8647         /* Choose which receivers/antennas to use */
8648         iwl4965_set_rxon_chain(priv);
8649
8650
8651         printk(KERN_INFO DRV_NAME
8652                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
8653
8654         /* Device-specific setup */
8655         if (iwl4965_hw_set_hw_setting(priv)) {
8656                 IWL_ERROR("failed to set hw settings\n");
8657                 goto out_iounmap;
8658         }
8659
8660         if (iwl4965_param_qos_enable)
8661                 priv->qos_data.qos_enable = 1;
8662
8663         iwl4965_reset_qos(priv);
8664
8665         priv->qos_data.qos_active = 0;
8666         priv->qos_data.qos_cap.val = 0;
8667
8668         iwl4965_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8669         iwl4965_setup_deferred_work(priv);
8670         iwl4965_setup_rx_handlers(priv);
8671
8672         priv->rates_mask = IWL_RATES_MASK;
8673         /* If power management is turned on, default to AC mode */
8674         priv->power_mode = IWL_POWER_AC;
8675         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8676
8677         iwl4965_disable_interrupts(priv);
8678
8679         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8680         if (err) {
8681                 IWL_ERROR("failed to create sysfs device attributes\n");
8682                 goto out_release_irq;
8683         }
8684
8685         /* nic init */
8686         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8687                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8688
8689         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8690         err = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
8691                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8692                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8693         if (err < 0) {
8694                 IWL_DEBUG_INFO("Failed to init the card\n");
8695                 goto out_remove_sysfs;
8696         }
8697         /* Read the EEPROM */
8698         err = iwl_eeprom_init(priv);
8699         if (err) {
8700                 IWL_ERROR("Unable to init EEPROM\n");
8701                 goto out_remove_sysfs;
8702         }
8703         /* MAC Address location in EEPROM same for 3945/4965 */
8704         iwl_eeprom_get_mac(priv, priv->mac_addr);
8705         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8706         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8707
8708         err = iwl4965_init_channel_map(priv);
8709         if (err) {
8710                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8711                 goto out_remove_sysfs;
8712         }
8713
8714         err = iwl4965_init_geos(priv);
8715         if (err) {
8716                 IWL_ERROR("initializing geos failed: %d\n", err);
8717                 goto out_free_channel_map;
8718         }
8719
8720         iwl4965_rate_control_register(priv->hw);
8721         err = ieee80211_register_hw(priv->hw);
8722         if (err) {
8723                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8724                 goto out_free_geos;
8725         }
8726
8727         priv->hw->conf.beacon_int = 100;
8728         priv->mac80211_registered = 1;
8729         pci_save_state(pdev);
8730         pci_disable_device(pdev);
8731
8732         return 0;
8733
8734  out_free_geos:
8735         iwl4965_free_geos(priv);
8736  out_free_channel_map:
8737         iwl4965_free_channel_map(priv);
8738  out_remove_sysfs:
8739         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8740
8741  out_release_irq:
8742         destroy_workqueue(priv->workqueue);
8743         priv->workqueue = NULL;
8744         iwl4965_unset_hw_setting(priv);
8745
8746  out_iounmap:
8747         pci_iounmap(pdev, priv->hw_base);
8748  out_pci_release_regions:
8749         pci_release_regions(pdev);
8750  out_pci_disable_device:
8751         pci_disable_device(pdev);
8752         pci_set_drvdata(pdev, NULL);
8753  out_ieee80211_free_hw:
8754         ieee80211_free_hw(priv->hw);
8755  out:
8756         return err;
8757 }
8758
8759 static void iwl4965_pci_remove(struct pci_dev *pdev)
8760 {
8761         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
8762         struct list_head *p, *q;
8763         int i;
8764
8765         if (!priv)
8766                 return;
8767
8768         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8769
8770         set_bit(STATUS_EXIT_PENDING, &priv->status);
8771
8772         iwl4965_down(priv);
8773
8774         /* Free MAC hash list for ADHOC */
8775         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8776                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8777                         list_del(p);
8778                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
8779                 }
8780         }
8781
8782         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8783
8784         iwl4965_dealloc_ucode_pci(priv);
8785
8786         if (priv->rxq.bd)
8787                 iwl4965_rx_queue_free(priv, &priv->rxq);
8788         iwl4965_hw_txq_ctx_free(priv);
8789
8790         iwl4965_unset_hw_setting(priv);
8791         iwl4965_clear_stations_table(priv);
8792
8793         if (priv->mac80211_registered) {
8794                 ieee80211_unregister_hw(priv->hw);
8795                 iwl4965_rate_control_unregister(priv->hw);
8796         }
8797
8798         /*netif_stop_queue(dev); */
8799         flush_workqueue(priv->workqueue);
8800
8801         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
8802          * priv->workqueue... so we can't take down the workqueue
8803          * until now... */
8804         destroy_workqueue(priv->workqueue);
8805         priv->workqueue = NULL;
8806
8807         pci_iounmap(pdev, priv->hw_base);
8808         pci_release_regions(pdev);
8809         pci_disable_device(pdev);
8810         pci_set_drvdata(pdev, NULL);
8811
8812         iwl4965_free_channel_map(priv);
8813         iwl4965_free_geos(priv);
8814
8815         if (priv->ibss_beacon)
8816                 dev_kfree_skb(priv->ibss_beacon);
8817
8818         ieee80211_free_hw(priv->hw);
8819 }
8820
8821 #ifdef CONFIG_PM
8822
8823 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8824 {
8825         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
8826
8827         if (priv->is_open) {
8828                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8829                 iwl4965_mac_stop(priv->hw);
8830                 priv->is_open = 1;
8831         }
8832
8833         pci_set_power_state(pdev, PCI_D3hot);
8834
8835         return 0;
8836 }
8837
8838 static int iwl4965_pci_resume(struct pci_dev *pdev)
8839 {
8840         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
8841
8842         pci_set_power_state(pdev, PCI_D0);
8843
8844         if (priv->is_open)
8845                 iwl4965_mac_start(priv->hw);
8846
8847         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8848         return 0;
8849 }
8850
8851 #endif /* CONFIG_PM */
8852
8853 /*****************************************************************************
8854  *
8855  * driver and module entry point
8856  *
8857  *****************************************************************************/
8858
8859 static struct pci_driver iwl4965_driver = {
8860         .name = DRV_NAME,
8861         .id_table = iwl4965_hw_card_ids,
8862         .probe = iwl4965_pci_probe,
8863         .remove = __devexit_p(iwl4965_pci_remove),
8864 #ifdef CONFIG_PM
8865         .suspend = iwl4965_pci_suspend,
8866         .resume = iwl4965_pci_resume,
8867 #endif
8868 };
8869
8870 static int __init iwl4965_init(void)
8871 {
8872
8873         int ret;
8874         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8875         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8876         ret = pci_register_driver(&iwl4965_driver);
8877         if (ret) {
8878                 IWL_ERROR("Unable to initialize PCI module\n");
8879                 return ret;
8880         }
8881 #ifdef CONFIG_IWL4965_DEBUG
8882         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8883         if (ret) {
8884                 IWL_ERROR("Unable to create driver sysfs file\n");
8885                 pci_unregister_driver(&iwl4965_driver);
8886                 return ret;
8887         }
8888 #endif
8889
8890         return ret;
8891 }
8892
8893 static void __exit iwl4965_exit(void)
8894 {
8895 #ifdef CONFIG_IWL4965_DEBUG
8896         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8897 #endif
8898         pci_unregister_driver(&iwl4965_driver);
8899 }
8900
8901 module_param_named(antenna, iwl4965_param_antenna, int, 0444);
8902 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8903 module_param_named(disable, iwl4965_param_disable, int, 0444);
8904 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8905 module_param_named(hwcrypto, iwl4965_param_hwcrypto, int, 0444);
8906 MODULE_PARM_DESC(hwcrypto,
8907                  "using hardware crypto engine (default 0 [software])\n");
8908 module_param_named(debug, iwl4965_param_debug, int, 0444);
8909 MODULE_PARM_DESC(debug, "debug output mask");
8910 module_param_named(disable_hw_scan, iwl4965_param_disable_hw_scan, int, 0444);
8911 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8912
8913 module_param_named(queues_num, iwl4965_param_queues_num, int, 0444);
8914 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8915
8916 /* QoS */
8917 module_param_named(qos_enable, iwl4965_param_qos_enable, int, 0444);
8918 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8919 module_param_named(amsdu_size_8K, iwl4965_param_amsdu_size_8K, int, 0444);
8920 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
8921
8922 module_exit(iwl4965_exit);
8923 module_init(iwl4965_init);