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-4965.h"
  50 #include "iwl-core.h"
  51 #include "iwl-io.h"
  52 #include "iwl-helpers.h"
  53 #include "iwl-sta.h"
  54 #include "iwl-calib.h"
  55
  56 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
  57                                   struct iwl4965_tx_queue *txq);
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /*
  66  * module name, copyright, version, etc.
  67  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  68  */
  69
  70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  79 #define VS "s"
  80 #else
  81 #define VS
  82 #endif
  83
  84 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  85
  86
  87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  88 MODULE_VERSION(DRV_VERSION);
  89 MODULE_AUTHOR(DRV_COPYRIGHT);
  90 MODULE_LICENSE("GPL");
  91
  92 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
  93 {
  94         u16 fc = le16_to_cpu(hdr->frame_control);
  95         int hdr_len = ieee80211_get_hdrlen(fc);
  96
  97         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
  98                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
  99         return NULL;
 100 }
 101
 102 static const struct ieee80211_supported_band *iwl_get_hw_mode(
 103                 struct iwl_priv *priv, enum ieee80211_band band)
 104 {
 105         return priv->hw->wiphy->bands[band];
 106 }
 107
 108 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 109 {
 110         /* Single white space is for Linksys APs */
 111         if (essid_len == 1 && essid[0] == ' ')
 112                 return 1;
 113
 114         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 115         while (essid_len) {
 116                 essid_len--;
 117                 if (essid[essid_len] != '\0')
 118                         return 0;
 119         }
 120
 121         return 1;
 122 }
 123
 124 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 125 {
 126         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 127         const char *s = essid;
 128         char *d = escaped;
 129
 130         if (iwl4965_is_empty_essid(essid, essid_len)) {
 131                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 132                 return escaped;
 133         }
 134
 135         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 136         while (essid_len--) {
 137                 if (*s == '\0') {
 138                         *d++ = '\\';
 139                         *d++ = '0';
 140                         s++;
 141                 } else
 142                         *d++ = *s++;
 143         }
 144         *d = '\0';
 145         return escaped;
 146 }
 147
 148 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 149  * DMA services
 150  *
 151  * Theory of operation
 152  *
 153  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 154  * of buffer descriptors, each of which points to one or more data buffers for
 155  * the device to read from or fill.  Driver and device exchange status of each
 156  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 157  * entries in each circular buffer, to protect against confusing empty and full
 158  * queue states.
 159  *
 160  * The device reads or writes the data in the queues via the device's several
 161  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 162  *
 163  * For Tx queue, there are low mark and high mark limits. If, after queuing
 164  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 165  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 166  * Tx queue resumed.
 167  *
 168  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 169  * queue (#4) for sending commands to the device firmware, and 15 other
 170  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 171  *
 172  * See more detailed info in iwl-4965-hw.h.
 173  ***************************************************/
 174
 175 int iwl4965_queue_space(const struct iwl4965_queue *q)
 176 {
 177         int s = q->read_ptr - q->write_ptr;
 178
 179         if (q->read_ptr > q->write_ptr)
 180                 s -= q->n_bd;
 181
 182         if (s <= 0)
 183                 s += q->n_window;
 184         /* keep some reserve to not confuse empty and full situations */
 185         s -= 2;
 186         if (s < 0)
 187                 s = 0;
 188         return s;
 189 }
 190
 191
 192 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 193 {
 194         return q->write_ptr > q->read_ptr ?
 195                 (i >= q->read_ptr && i < q->write_ptr) :
 196                 !(i < q->read_ptr && i >= q->write_ptr);
 197 }
 198
 199 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 200 {
 201         /* This is for scan command, the big buffer at end of command array */
 202         if (is_huge)
 203                 return q->n_window;     /* must be power of 2 */
 204
 205         /* Otherwise, use normal size buffers */
 206         return index & (q->n_window - 1);
 207 }
 208
 209 /**
 210  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 211  */
 212 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
 213                           int count, int slots_num, u32 id)
 214 {
 215         q->n_bd = count;
 216         q->n_window = slots_num;
 217         q->id = id;
 218
 219         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 220          * and iwl_queue_dec_wrap are broken. */
 221         BUG_ON(!is_power_of_2(count));
 222
 223         /* slots_num must be power-of-two size, otherwise
 224          * get_cmd_index is broken. */
 225         BUG_ON(!is_power_of_2(slots_num));
 226
 227         q->low_mark = q->n_window / 4;
 228         if (q->low_mark < 4)
 229                 q->low_mark = 4;
 230
 231         q->high_mark = q->n_window / 8;
 232         if (q->high_mark < 2)
 233                 q->high_mark = 2;
 234
 235         q->write_ptr = q->read_ptr = 0;
 236
 237         return 0;
 238 }
 239
 240 /**
 241  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 242  */
 243 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
 244                               struct iwl4965_tx_queue *txq, u32 id)
 245 {
 246         struct pci_dev *dev = priv->pci_dev;
 247
 248         /* Driver private data, only for Tx (not command) queues,
 249          * not shared with device. */
 250         if (id != IWL_CMD_QUEUE_NUM) {
 251                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 252                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 253                 if (!txq->txb) {
 254                         IWL_ERROR("kmalloc for auxiliary BD "
 255                                   "structures failed\n");
 256                         goto error;
 257                 }
 258         } else
 259                 txq->txb = NULL;
 260
 261         /* Circular buffer of transmit frame descriptors (TFDs),
 262          * shared with device */
 263         txq->bd = pci_alloc_consistent(dev,
 264                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 265                         &txq->q.dma_addr);
 266
 267         if (!txq->bd) {
 268                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 269                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 270                 goto error;
 271         }
 272         txq->q.id = id;
 273
 274         return 0;
 275
 276  error:
 277         if (txq->txb) {
 278                 kfree(txq->txb);
 279                 txq->txb = NULL;
 280         }
 281
 282         return -ENOMEM;
 283 }
 284
 285 /**
 286  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 287  */
 288 int iwl4965_tx_queue_init(struct iwl_priv *priv,
 289                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 290 {
 291         struct pci_dev *dev = priv->pci_dev;
 292         int len;
 293         int rc = 0;
 294
 295         /*
 296          * Alloc buffer array for commands (Tx or other types of commands).
 297          * For the command queue (#4), allocate command space + one big
 298          * command for scan, since scan command is very huge; the system will
 299          * not have two scans at the same time, so only one is needed.
 300          * For normal Tx queues (all other queues), no super-size command
 301          * space is needed.
 302          */
 303         len = sizeof(struct iwl_cmd) * slots_num;
 304         if (txq_id == IWL_CMD_QUEUE_NUM)
 305                 len +=  IWL_MAX_SCAN_SIZE;
 306         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 307         if (!txq->cmd)
 308                 return -ENOMEM;
 309
 310         /* Alloc driver data array and TFD circular buffer */
 311         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 312         if (rc) {
 313                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 314
 315                 return -ENOMEM;
 316         }
 317         txq->need_update = 0;
 318
 319         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 320          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 321         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 322
 323         /* Initialize queue's high/low-water marks, and head/tail indexes */
 324         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 325
 326         /* Tell device where to find queue */
 327         iwl4965_hw_tx_queue_init(priv, txq);
 328
 329         return 0;
 330 }
 331
 332 /**
 333  * iwl4965_tx_queue_free - Deallocate DMA queue.
 334  * @txq: Transmit queue to deallocate.
 335  *
 336  * Empty queue by removing and destroying all BD's.
 337  * Free all buffers.
 338  * 0-fill, but do not free "txq" descriptor structure.
 339  */
 340 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
 341 {
 342         struct iwl4965_queue *q = &txq->q;
 343         struct pci_dev *dev = priv->pci_dev;
 344         int len;
 345
 346         if (q->n_bd == 0)
 347                 return;
 348
 349         /* first, empty all BD's */
 350         for (; q->write_ptr != q->read_ptr;
 351              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 352                 iwl4965_hw_txq_free_tfd(priv, txq);
 353
 354         len = sizeof(struct iwl_cmd) * q->n_window;
 355         if (q->id == IWL_CMD_QUEUE_NUM)
 356                 len += IWL_MAX_SCAN_SIZE;
 357
 358         /* De-alloc array of command/tx buffers */
 359         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 360
 361         /* De-alloc circular buffer of TFDs */
 362         if (txq->q.n_bd)
 363                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 364                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 365
 366         /* De-alloc array of per-TFD driver data */
 367         if (txq->txb) {
 368                 kfree(txq->txb);
 369                 txq->txb = NULL;
 370         }
 371
 372         /* 0-fill queue descriptor structure */
 373         memset(txq, 0, sizeof(*txq));
 374 }
 375
 376 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 377
 378 /*************** STATION TABLE MANAGEMENT ****
 379  * mac80211 should be examined to determine if sta_info is duplicating
 380  * the functionality provided here
 381  */
 382
 383 /**************************************************************/
 384
 385 #if 0 /* temporary disable till we add real remove station */
 386 /**
 387  * iwl4965_remove_station - Remove driver's knowledge of station.
 388  *
 389  * NOTE:  This does not remove station from device's station table.
 390  */
 391 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 392 {
 393         int index = IWL_INVALID_STATION;
 394         int i;
 395         unsigned long flags;
 396
 397         spin_lock_irqsave(&priv->sta_lock, flags);
 398
 399         if (is_ap)
 400                 index = IWL_AP_ID;
 401         else if (is_broadcast_ether_addr(addr))
 402                 index = priv->hw_params.bcast_sta_id;
 403         else
 404                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 405                         if (priv->stations[i].used &&
 406                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 407                                                 addr)) {
 408                                 index = i;
 409                                 break;
 410                         }
 411
 412         if (unlikely(index == IWL_INVALID_STATION))
 413                 goto out;
 414
 415         if (priv->stations[index].used) {
 416                 priv->stations[index].used = 0;
 417                 priv->num_stations--;
 418         }
 419
 420         BUG_ON(priv->num_stations < 0);
 421
 422 out:
 423         spin_unlock_irqrestore(&priv->sta_lock, flags);
 424         return 0;
 425 }
 426 #endif
 427
 428 /**
 429  * iwl4965_add_station_flags - Add station to tables in driver and device
 430  */
 431 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
 432                                 int is_ap, u8 flags, void *ht_data)
 433 {
 434         int i;
 435         int index = IWL_INVALID_STATION;
 436         struct iwl4965_station_entry *station;
 437         unsigned long flags_spin;
 438         DECLARE_MAC_BUF(mac);
 439
 440         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 441         if (is_ap)
 442                 index = IWL_AP_ID;
 443         else if (is_broadcast_ether_addr(addr))
 444                 index = priv->hw_params.bcast_sta_id;
 445         else
 446                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 447                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 448                                                 addr)) {
 449                                 index = i;
 450                                 break;
 451                         }
 452
 453                         if (!priv->stations[i].used &&
 454                             index == IWL_INVALID_STATION)
 455                                 index = i;
 456                 }
 457
 458
 459         /* These two conditions have the same outcome, but keep them separate
 460           since they have different meanings */
 461         if (unlikely(index == IWL_INVALID_STATION)) {
 462                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 463                 return index;
 464         }
 465
 466         if (priv->stations[index].used &&
 467             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 468                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 469                 return index;
 470         }
 471
 472
 473         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 474         station = &priv->stations[index];
 475         station->used = 1;
 476         priv->num_stations++;
 477
 478         /* Set up the REPLY_ADD_STA command to send to device */
 479         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 480         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 481         station->sta.mode = 0;
 482         station->sta.sta.sta_id = index;
 483         station->sta.station_flags = 0;
 484
 485 #ifdef CONFIG_IWL4965_HT
 486         /* BCAST station and IBSS stations do not work in HT mode */
 487         if (index != priv->hw_params.bcast_sta_id &&
 488             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 489                 iwl4965_set_ht_add_station(priv, index,
 490                                  (struct ieee80211_ht_info *) ht_data);
 491 #endif /*CONFIG_IWL4965_HT*/
 492
 493         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 494
 495         /* Add station to device's station table */
 496         iwl4965_send_add_station(priv, &station->sta, flags);
 497         return index;
 498
 499 }
 500
 501
 502
 503 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 504
 505 /**
 506  * iwl4965_enqueue_hcmd - enqueue a uCode command
 507  * @priv: device private data point
 508  * @cmd: a point to the ucode command structure
 509  *
 510  * The function returns < 0 values to indicate the operation is
 511  * failed. On success, it turns the index (> 0) of command in the
 512  * command queue.
 513  */
 514 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 515 {
 516         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 517         struct iwl4965_queue *q = &txq->q;
 518         struct iwl4965_tfd_frame *tfd;
 519         u32 *control_flags;
 520         struct iwl_cmd *out_cmd;
 521         u32 idx;
 522         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 523         dma_addr_t phys_addr;
 524         int ret;
 525         unsigned long flags;
 526
 527         /* If any of the command structures end up being larger than
 528          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 529          * we will need to increase the size of the TFD entries */
 530         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 531                !(cmd->meta.flags & CMD_SIZE_HUGE));
 532
 533         if (iwl_is_rfkill(priv)) {
 534                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 535                 return -EIO;
 536         }
 537
 538         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 539                 IWL_ERROR("No space for Tx\n");
 540                 return -ENOSPC;
 541         }
 542
 543         spin_lock_irqsave(&priv->hcmd_lock, flags);
 544
 545         tfd = &txq->bd[q->write_ptr];
 546         memset(tfd, 0, sizeof(*tfd));
 547
 548         control_flags = (u32 *) tfd;
 549
 550         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 551         out_cmd = &txq->cmd[idx];
 552
 553         out_cmd->hdr.cmd = cmd->id;
 554         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 555         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 556
 557         /* At this point, the out_cmd now has all of the incoming cmd
 558          * information */
 559
 560         out_cmd->hdr.flags = 0;
 561         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 562                         INDEX_TO_SEQ(q->write_ptr));
 563         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 564                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 565
 566         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 567                         offsetof(struct iwl_cmd, hdr);
 568         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 569
 570         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 571                      "%d bytes at %d[%d]:%d\n",
 572                      get_cmd_string(out_cmd->hdr.cmd),
 573                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 574                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 575
 576         txq->need_update = 1;
 577
 578         /* Set up entry in queue's byte count circular buffer */
 579         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, 0);
 580
 581         /* Increment and update queue's write index */
 582         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 583         ret = iwl4965_tx_queue_update_write_ptr(priv, txq);
 584
 585         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 586         return ret ? ret : idx;
 587 }
 588
 589 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 590 {
 591         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 592
 593         if (hw_decrypt)
 594                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 595         else
 596                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 597
 598 }
 599
 600 /**
 601  * iwl4965_rxon_add_station - add station into station table.
 602  *
 603  * there is only one AP station with id= IWL_AP_ID
 604  * NOTE: mutex must be held before calling this fnction
 605  */
 606 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 607                                 const u8 *addr, int is_ap)
 608 {
 609         u8 sta_id;
 610
 611         /* Add station to device's station table */
 612 #ifdef CONFIG_IWL4965_HT
 613         struct ieee80211_conf *conf = &priv->hw->conf;
 614         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 615
 616         if ((is_ap) &&
 617             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 618             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 619                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 620                                                    0, cur_ht_config);
 621         else
 622 #endif /* CONFIG_IWL4965_HT */
 623                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 624                                                    0, NULL);
 625
 626         /* Set up default rate scaling table in device's station table */
 627         iwl4965_add_station(priv, addr, is_ap);
 628
 629         return sta_id;
 630 }
 631
 632 /**
 633  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 634  *
 635  * NOTE:  This is really only useful during development and can eventually
 636  * be #ifdef'd out once the driver is stable and folks aren't actively
 637  * making changes
 638  */
 639 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 640 {
 641         int error = 0;
 642         int counter = 1;
 643
 644         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 645                 error |= le32_to_cpu(rxon->flags &
 646                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 647                                  RXON_FLG_RADAR_DETECT_MSK));
 648                 if (error)
 649                         IWL_WARNING("check 24G fields %d | %d\n",
 650                                     counter++, error);
 651         } else {
 652                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 653                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 654                 if (error)
 655                         IWL_WARNING("check 52 fields %d | %d\n",
 656                                     counter++, error);
 657                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 658                 if (error)
 659                         IWL_WARNING("check 52 CCK %d | %d\n",
 660                                     counter++, error);
 661         }
 662         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 663         if (error)
 664                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 665
 666         /* make sure basic rates 6Mbps and 1Mbps are supported */
 667         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 668                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 669         if (error)
 670                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 671
 672         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 673         if (error)
 674                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 675
 676         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 677                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 678         if (error)
 679                 IWL_WARNING("check CCK and short slot %d | %d\n",
 680                             counter++, error);
 681
 682         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 683                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 684         if (error)
 685                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 686                             counter++, error);
 687
 688         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 689                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 690         if (error)
 691                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 692                             counter++, error);
 693
 694         if (error)
 695                 IWL_WARNING("Tuning to channel %d\n",
 696                             le16_to_cpu(rxon->channel));
 697
 698         if (error) {
 699                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 700                 return -1;
 701         }
 702         return 0;
 703 }
 704
 705 /**
 706  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 707  * @priv: staging_rxon is compared to active_rxon
 708  *
 709  * If the RXON structure is changing enough to require a new tune,
 710  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 711  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 712  */
 713 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 714 {
 715
 716         /* These items are only settable from the full RXON command */
 717         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 718             compare_ether_addr(priv->staging_rxon.bssid_addr,
 719                                priv->active_rxon.bssid_addr) ||
 720             compare_ether_addr(priv->staging_rxon.node_addr,
 721                                priv->active_rxon.node_addr) ||
 722             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 723                                priv->active_rxon.wlap_bssid_addr) ||
 724             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 725             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 726             (priv->staging_rxon.air_propagation !=
 727              priv->active_rxon.air_propagation) ||
 728             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 729              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 730             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 731              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 732             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 733             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 734                 return 1;
 735
 736         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 737          * be updated with the RXON_ASSOC command -- however only some
 738          * flag transitions are allowed using RXON_ASSOC */
 739
 740         /* Check if we are not switching bands */
 741         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 742             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 743                 return 1;
 744
 745         /* Check if we are switching association toggle */
 746         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 747                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 748                 return 1;
 749
 750         return 0;
 751 }
 752
 753 /**
 754  * iwl4965_commit_rxon - commit staging_rxon to hardware
 755  *
 756  * The RXON command in staging_rxon is committed to the hardware and
 757  * the active_rxon structure is updated with the new data.  This
 758  * function correctly transitions out of the RXON_ASSOC_MSK state if
 759  * a HW tune is required based on the RXON structure changes.
 760  */
 761 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 762 {
 763         /* cast away the const for active_rxon in this function */
 764         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 765         DECLARE_MAC_BUF(mac);
 766         int rc = 0;
 767
 768         if (!iwl_is_alive(priv))
 769                 return -1;
 770
 771         /* always get timestamp with Rx frame */
 772         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 773
 774         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 775         if (rc) {
 776                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 777                 return -EINVAL;
 778         }
 779
 780         /* If we don't need to send a full RXON, we can use
 781          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 782          * and other flags for the current radio configuration. */
 783         if (!iwl4965_full_rxon_required(priv)) {
 784                 rc = iwl_send_rxon_assoc(priv);
 785                 if (rc) {
 786                         IWL_ERROR("Error setting RXON_ASSOC "
 787                                   "configuration (%d).\n", rc);
 788                         return rc;
 789                 }
 790
 791                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 792
 793                 return 0;
 794         }
 795
 796         /* station table will be cleared */
 797         priv->assoc_station_added = 0;
 798
 799         /* If we are currently associated and the new config requires
 800          * an RXON_ASSOC and the new config wants the associated mask enabled,
 801          * we must clear the associated from the active configuration
 802          * before we apply the new config */
 803         if (iwl_is_associated(priv) &&
 804             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 805                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 806                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 807
 808                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 809                                       sizeof(struct iwl4965_rxon_cmd),
 810                                       &priv->active_rxon);
 811
 812                 /* If the mask clearing failed then we set
 813                  * active_rxon back to what it was previously */
 814                 if (rc) {
 815                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 816                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 817                                   "configuration (%d).\n", rc);
 818                         return rc;
 819                 }
 820         }
 821
 822         IWL_DEBUG_INFO("Sending RXON\n"
 823                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 824                        "* channel = %d\n"
 825                        "* bssid = %s\n",
 826                        ((priv->staging_rxon.filter_flags &
 827                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 828                        le16_to_cpu(priv->staging_rxon.channel),
 829                        print_mac(mac, priv->staging_rxon.bssid_addr));
 830
 831         iwl4965_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 832         /* Apply the new configuration */
 833         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 834                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
 835         if (rc) {
 836                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 837                 return rc;
 838         }
 839
 840         iwlcore_clear_stations_table(priv);
 841
 842         if (!priv->error_recovering)
 843                 priv->start_calib = 0;
 844
 845         iwl_init_sensitivity(priv);
 846
 847         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 848
 849         /* If we issue a new RXON command which required a tune then we must
 850          * send a new TXPOWER command or we won't be able to Tx any frames */
 851         rc = iwl4965_hw_reg_send_txpower(priv);
 852         if (rc) {
 853                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 854                 return rc;
 855         }
 856
 857         /* Add the broadcast address so we can send broadcast frames */
 858         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
 859             IWL_INVALID_STATION) {
 860                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 861                 return -EIO;
 862         }
 863
 864         /* If we have set the ASSOC_MSK and we are in BSS mode then
 865          * add the IWL_AP_ID to the station rate table */
 866         if (iwl_is_associated(priv) &&
 867             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 868                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 869                     == IWL_INVALID_STATION) {
 870                         IWL_ERROR("Error adding AP address for transmit.\n");
 871                         return -EIO;
 872                 }
 873                 priv->assoc_station_added = 1;
 874                 if (priv->default_wep_key &&
 875                     iwl_send_static_wepkey_cmd(priv, 0))
 876                         IWL_ERROR("Could not send WEP static key.\n");
 877         }
 878
 879         return 0;
 880 }
 881
 882 void iwl4965_update_chain_flags(struct iwl_priv *priv)
 883 {
 884
 885         iwl4965_set_rxon_chain(priv);
 886         iwl4965_commit_rxon(priv);
 887 }
 888
 889 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 890 {
 891         struct iwl4965_bt_cmd bt_cmd = {
 892                 .flags = 3,
 893                 .lead_time = 0xAA,
 894                 .max_kill = 1,
 895                 .kill_ack_mask = 0,
 896                 .kill_cts_mask = 0,
 897         };
 898
 899         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 900                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 901 }
 902
 903 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
 904 {
 905         int rc = 0;
 906         struct iwl4965_rx_packet *res;
 907         struct iwl_host_cmd cmd = {
 908                 .id = REPLY_SCAN_ABORT_CMD,
 909                 .meta.flags = CMD_WANT_SKB,
 910         };
 911
 912         /* If there isn't a scan actively going on in the hardware
 913          * then we are in between scan bands and not actually
 914          * actively scanning, so don't send the abort command */
 915         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 916                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 917                 return 0;
 918         }
 919
 920         rc = iwl_send_cmd_sync(priv, &cmd);
 921         if (rc) {
 922                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 923                 return rc;
 924         }
 925
 926         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 927         if (res->u.status != CAN_ABORT_STATUS) {
 928                 /* The scan abort will return 1 for success or
 929                  * 2 for "failure".  A failure condition can be
 930                  * due to simply not being in an active scan which
 931                  * can occur if we send the scan abort before we
 932                  * the microcode has notified us that a scan is
 933                  * completed. */
 934                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 935                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 936                 clear_bit(STATUS_SCAN_HW, &priv->status);
 937         }
 938
 939         dev_kfree_skb_any(cmd.meta.u.skb);
 940
 941         return rc;
 942 }
 943
 944 /*
 945  * CARD_STATE_CMD
 946  *
 947  * Use: Sets the device's internal card state to enable, disable, or halt
 948  *
 949  * When in the 'enable' state the card operates as normal.
 950  * When in the 'disable' state, the card enters into a low power mode.
 951  * When in the 'halt' state, the card is shut down and must be fully
 952  * restarted to come back on.
 953  */
 954 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
 955 {
 956         struct iwl_host_cmd cmd = {
 957                 .id = REPLY_CARD_STATE_CMD,
 958                 .len = sizeof(u32),
 959                 .data = &flags,
 960                 .meta.flags = meta_flag,
 961         };
 962
 963         return iwl_send_cmd(priv, &cmd);
 964 }
 965
 966 int iwl4965_send_add_station(struct iwl_priv *priv,
 967                          struct iwl4965_addsta_cmd *sta, u8 flags)
 968 {
 969         struct iwl4965_rx_packet *res = NULL;
 970         int rc = 0;
 971         struct iwl_host_cmd cmd = {
 972                 .id = REPLY_ADD_STA,
 973                 .len = sizeof(struct iwl4965_addsta_cmd),
 974                 .meta.flags = flags,
 975                 .data = sta,
 976         };
 977
 978         if (!(flags & CMD_ASYNC))
 979                 cmd.meta.flags |= CMD_WANT_SKB;
 980
 981         rc = iwl_send_cmd(priv, &cmd);
 982
 983         if (rc || (flags & CMD_ASYNC))
 984                 return rc;
 985
 986         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 987         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 988                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
 989                           res->hdr.flags);
 990                 rc = -EIO;
 991         }
 992
 993         if (rc == 0) {
 994                 switch (res->u.add_sta.status) {
 995                 case ADD_STA_SUCCESS_MSK:
 996                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 997                         break;
 998                 default:
 999                         rc = -EIO;
1000                         IWL_WARNING("REPLY_ADD_STA failed\n");
1001                         break;
1002                 }
1003         }
1004
1005         priv->alloc_rxb_skb--;
1006         dev_kfree_skb_any(cmd.meta.u.skb);
1007
1008         return rc;
1009 }
1010
1011 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1012 {
1013         struct list_head *element;
1014
1015         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1016                        priv->frames_count);
1017
1018         while (!list_empty(&priv->free_frames)) {
1019                 element = priv->free_frames.next;
1020                 list_del(element);
1021                 kfree(list_entry(element, struct iwl4965_frame, list));
1022                 priv->frames_count--;
1023         }
1024
1025         if (priv->frames_count) {
1026                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1027                             priv->frames_count);
1028                 priv->frames_count = 0;
1029         }
1030 }
1031
1032 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1033 {
1034         struct iwl4965_frame *frame;
1035         struct list_head *element;
1036         if (list_empty(&priv->free_frames)) {
1037                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1038                 if (!frame) {
1039                         IWL_ERROR("Could not allocate frame!\n");
1040                         return NULL;
1041                 }
1042
1043                 priv->frames_count++;
1044                 return frame;
1045         }
1046
1047         element = priv->free_frames.next;
1048         list_del(element);
1049         return list_entry(element, struct iwl4965_frame, list);
1050 }
1051
1052 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1053 {
1054         memset(frame, 0, sizeof(*frame));
1055         list_add(&frame->list, &priv->free_frames);
1056 }
1057
1058 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1059                                 struct ieee80211_hdr *hdr,
1060                                 const u8 *dest, int left)
1061 {
1062
1063         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1064             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1065              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1066                 return 0;
1067
1068         if (priv->ibss_beacon->len > left)
1069                 return 0;
1070
1071         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1072
1073         return priv->ibss_beacon->len;
1074 }
1075
1076 static u8 iwl4965_rate_get_lowest_plcp(struct iwl_priv *priv)
1077 {
1078         int i;
1079         int rate_mask;
1080
1081         /* Set rate mask*/
1082         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1083                 rate_mask = priv->active_rate_basic & 0xF;
1084         else
1085                 rate_mask = priv->active_rate_basic & 0xFF0;
1086
1087         /* Find lowest valid rate */
1088         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1089                                         i = iwl4965_rates[i].next_ieee) {
1090                 if (rate_mask & (1 << i))
1091                         return iwl4965_rates[i].plcp;
1092         }
1093
1094         /* No valid rate was found. Assign the lowest one */
1095         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
1096                 return IWL_RATE_1M_PLCP;
1097         else
1098                 return IWL_RATE_6M_PLCP;
1099 }
1100
1101 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1102 {
1103         struct iwl4965_frame *frame;
1104         unsigned int frame_size;
1105         int rc;
1106         u8 rate;
1107
1108         frame = iwl4965_get_free_frame(priv);
1109
1110         if (!frame) {
1111                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1112                           "command.\n");
1113                 return -ENOMEM;
1114         }
1115
1116         rate = iwl4965_rate_get_lowest_plcp(priv);
1117
1118         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1119
1120         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1121                               &frame->u.cmd[0]);
1122
1123         iwl4965_free_frame(priv, frame);
1124
1125         return rc;
1126 }
1127
1128 /******************************************************************************
1129  *
1130  * Misc. internal state and helper functions
1131  *
1132  ******************************************************************************/
1133
1134 /**
1135  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1136  *
1137  * return : set the bit for each supported rate insert in ie
1138  */
1139 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1140                                     u16 basic_rate, int *left)
1141 {
1142         u16 ret_rates = 0, bit;
1143         int i;
1144         u8 *cnt = ie;
1145         u8 *rates = ie + 1;
1146
1147         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1148                 if (bit & supported_rate) {
1149                         ret_rates |= bit;
1150                         rates[*cnt] = iwl4965_rates[i].ieee |
1151                                 ((bit & basic_rate) ? 0x80 : 0x00);
1152                         (*cnt)++;
1153                         (*left)--;
1154                         if ((*left <= 0) ||
1155                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1156                                 break;
1157                 }
1158         }
1159
1160         return ret_rates;
1161 }
1162
1163 #ifdef CONFIG_IWL4965_HT
1164 static void iwl4965_ht_conf(struct iwl_priv *priv,
1165                             struct ieee80211_bss_conf *bss_conf)
1166 {
1167         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
1168         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
1169         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
1170
1171         IWL_DEBUG_MAC80211("enter: \n");
1172
1173         iwl_conf->is_ht = bss_conf->assoc_ht;
1174
1175         if (!iwl_conf->is_ht)
1176                 return;
1177
1178         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1179
1180         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
1181                 iwl_conf->sgf |= 0x1;
1182         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
1183                 iwl_conf->sgf |= 0x2;
1184
1185         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
1186         iwl_conf->max_amsdu_size =
1187                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
1188
1189         iwl_conf->supported_chan_width =
1190                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
1191         iwl_conf->extension_chan_offset =
1192                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
1193         /* If no above or below channel supplied disable FAT channel */
1194         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
1195             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
1196                 iwl_conf->supported_chan_width = 0;
1197
1198         iwl_conf->tx_mimo_ps_mode =
1199                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
1200         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
1201
1202         iwl_conf->control_channel = ht_bss_conf->primary_channel;
1203         iwl_conf->tx_chan_width =
1204                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
1205         iwl_conf->ht_protection =
1206                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
1207         iwl_conf->non_GF_STA_present =
1208                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
1209
1210         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
1211         IWL_DEBUG_MAC80211("leave\n");
1212 }
1213
1214 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1215                         u8 *pos, int *left)
1216 {
1217         struct ieee80211_ht_cap *ht_cap;
1218
1219         if (!sband || !sband->ht_info.ht_supported)
1220                 return;
1221
1222         if (*left < sizeof(struct ieee80211_ht_cap))
1223                 return;
1224
1225         *pos++ = sizeof(struct ieee80211_ht_cap);
1226         ht_cap = (struct ieee80211_ht_cap *) pos;
1227
1228         ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1229         memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1230         ht_cap->ampdu_params_info =
1231                 (sband->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
1232                 ((sband->ht_info.ampdu_density << 2) &
1233                         IEEE80211_HT_CAP_AMPDU_DENSITY);
1234         *left -= sizeof(struct ieee80211_ht_cap);
1235 }
1236 #else
1237 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
1238                                    struct ieee80211_bss_conf *bss_conf)
1239 {
1240 }
1241 static void iwl_ht_cap_to_ie(const struct ieee80211_supported_band *sband,
1242                         u8 *pos, int *left)
1243 {
1244 }
1245 #endif
1246
1247
1248 /**
1249  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1250  */
1251 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1252                                   enum ieee80211_band band,
1253                                   struct ieee80211_mgmt *frame,
1254                                   int left, int is_direct)
1255 {
1256         int len = 0;
1257         u8 *pos = NULL;
1258         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1259         const struct ieee80211_supported_band *sband =
1260                                                 iwl_get_hw_mode(priv, band);
1261
1262         /* Make sure there is enough space for the probe request,
1263          * two mandatory IEs and the data */
1264         left -= 24;
1265         if (left < 0)
1266                 return 0;
1267         len += 24;
1268
1269         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1270         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1271         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1272         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1273         frame->seq_ctrl = 0;
1274
1275         /* fill in our indirect SSID IE */
1276         /* ...next IE... */
1277
1278         left -= 2;
1279         if (left < 0)
1280                 return 0;
1281         len += 2;
1282         pos = &(frame->u.probe_req.variable[0]);
1283         *pos++ = WLAN_EID_SSID;
1284         *pos++ = 0;
1285
1286         /* fill in our direct SSID IE... */
1287         if (is_direct) {
1288                 /* ...next IE... */
1289                 left -= 2 + priv->essid_len;
1290                 if (left < 0)
1291                         return 0;
1292                 /* ... fill it in... */
1293                 *pos++ = WLAN_EID_SSID;
1294                 *pos++ = priv->essid_len;
1295                 memcpy(pos, priv->essid, priv->essid_len);
1296                 pos += priv->essid_len;
1297                 len += 2 + priv->essid_len;
1298         }
1299
1300         /* fill in supported rate */
1301         /* ...next IE... */
1302         left -= 2;
1303         if (left < 0)
1304                 return 0;
1305
1306         /* ... fill it in... */
1307         *pos++ = WLAN_EID_SUPP_RATES;
1308         *pos = 0;
1309
1310         /* exclude 60M rate */
1311         active_rates = priv->rates_mask;
1312         active_rates &= ~IWL_RATE_60M_MASK;
1313
1314         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1315
1316         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1317         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1318                         active_rate_basic, &left);
1319         active_rates &= ~ret_rates;
1320
1321         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1322                                  active_rate_basic, &left);
1323         active_rates &= ~ret_rates;
1324
1325         len += 2 + *pos;
1326         pos += (*pos) + 1;
1327         if (active_rates == 0)
1328                 goto fill_end;
1329
1330         /* fill in supported extended rate */
1331         /* ...next IE... */
1332         left -= 2;
1333         if (left < 0)
1334                 return 0;
1335         /* ... fill it in... */
1336         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1337         *pos = 0;
1338         iwl4965_supported_rate_to_ie(pos, active_rates,
1339                                  active_rate_basic, &left);
1340         if (*pos > 0)
1341                 len += 2 + *pos;
1342
1343  fill_end:
1344         /* fill in HT IE */
1345         left -= 2;
1346         if (left < 0)
1347                 return 0;
1348
1349         *pos++ = WLAN_EID_HT_CAPABILITY;
1350         *pos = 0;
1351
1352         iwl_ht_cap_to_ie(sband, pos, &left);
1353
1354         if (*pos > 0)
1355                 len += 2 + *pos;
1356         return (u16)len;
1357 }
1358
1359 /*
1360  * QoS  support
1361 */
1362 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1363                                        struct iwl4965_qosparam_cmd *qos)
1364 {
1365
1366         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1367                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1368 }
1369
1370 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1371 {
1372         unsigned long flags;
1373
1374         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1375                 return;
1376
1377         if (!priv->qos_data.qos_enable)
1378                 return;
1379
1380         spin_lock_irqsave(&priv->lock, flags);
1381         priv->qos_data.def_qos_parm.qos_flags = 0;
1382
1383         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1384             !priv->qos_data.qos_cap.q_AP.txop_request)
1385                 priv->qos_data.def_qos_parm.qos_flags |=
1386                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1387         if (priv->qos_data.qos_active)
1388                 priv->qos_data.def_qos_parm.qos_flags |=
1389                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1390
1391 #ifdef CONFIG_IWL4965_HT
1392         if (priv->current_ht_config.is_ht)
1393                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1394 #endif /* CONFIG_IWL4965_HT */
1395
1396         spin_unlock_irqrestore(&priv->lock, flags);
1397
1398         if (force || iwl_is_associated(priv)) {
1399                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1400                                 priv->qos_data.qos_active,
1401                                 priv->qos_data.def_qos_parm.qos_flags);
1402
1403                 iwl4965_send_qos_params_command(priv,
1404                                 &(priv->qos_data.def_qos_parm));
1405         }
1406 }
1407
1408 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1409 {
1410         /* Filter incoming packets to determine if they are targeted toward
1411          * this network, discarding packets coming from ourselves */
1412         switch (priv->iw_mode) {
1413         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1414                 /* packets from our adapter are dropped (echo) */
1415                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1416                         return 0;
1417                 /* {broad,multi}cast packets to our IBSS go through */
1418                 if (is_multicast_ether_addr(header->addr1))
1419                         return !compare_ether_addr(header->addr3, priv->bssid);
1420                 /* packets to our adapter go through */
1421                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1422         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1423                 /* packets from our adapter are dropped (echo) */
1424                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1425                         return 0;
1426                 /* {broad,multi}cast packets to our BSS go through */
1427                 if (is_multicast_ether_addr(header->addr1))
1428                         return !compare_ether_addr(header->addr2, priv->bssid);
1429                 /* packets to our adapter go through */
1430                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1431         default:
1432                 break;
1433         }
1434
1435         return 1;
1436 }
1437
1438 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1439
1440 static const char *iwl4965_get_tx_fail_reason(u32 status)
1441 {
1442         switch (status & TX_STATUS_MSK) {
1443         case TX_STATUS_SUCCESS:
1444                 return "SUCCESS";
1445                 TX_STATUS_ENTRY(SHORT_LIMIT);
1446                 TX_STATUS_ENTRY(LONG_LIMIT);
1447                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1448                 TX_STATUS_ENTRY(MGMNT_ABORT);
1449                 TX_STATUS_ENTRY(NEXT_FRAG);
1450                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1451                 TX_STATUS_ENTRY(DEST_PS);
1452                 TX_STATUS_ENTRY(ABORTED);
1453                 TX_STATUS_ENTRY(BT_RETRY);
1454                 TX_STATUS_ENTRY(STA_INVALID);
1455                 TX_STATUS_ENTRY(FRAG_DROPPED);
1456                 TX_STATUS_ENTRY(TID_DISABLE);
1457                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1458                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1459                 TX_STATUS_ENTRY(TX_LOCKED);
1460                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1461         }
1462
1463         return "UNKNOWN";
1464 }
1465
1466 /**
1467  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1468  *
1469  * NOTE: priv->mutex is not required before calling this function
1470  */
1471 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1472 {
1473         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1474                 clear_bit(STATUS_SCANNING, &priv->status);
1475                 return 0;
1476         }
1477
1478         if (test_bit(STATUS_SCANNING, &priv->status)) {
1479                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1480                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1481                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1482                         queue_work(priv->workqueue, &priv->abort_scan);
1483
1484                 } else
1485                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1486
1487                 return test_bit(STATUS_SCANNING, &priv->status);
1488         }
1489
1490         return 0;
1491 }
1492
1493 /**
1494  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1495  * @ms: amount of time to wait (in milliseconds) for scan to abort
1496  *
1497  * NOTE: priv->mutex must be held before calling this function
1498  */
1499 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1500 {
1501         unsigned long now = jiffies;
1502         int ret;
1503
1504         ret = iwl4965_scan_cancel(priv);
1505         if (ret && ms) {
1506                 mutex_unlock(&priv->mutex);
1507                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1508                                 test_bit(STATUS_SCANNING, &priv->status))
1509                         msleep(1);
1510                 mutex_lock(&priv->mutex);
1511
1512                 return test_bit(STATUS_SCANNING, &priv->status);
1513         }
1514
1515         return ret;
1516 }
1517
1518 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1519 {
1520         /* Reset ieee stats */
1521
1522         /* We don't reset the net_device_stats (ieee->stats) on
1523          * re-association */
1524
1525         priv->last_seq_num = -1;
1526         priv->last_frag_num = -1;
1527         priv->last_packet_time = 0;
1528
1529         iwl4965_scan_cancel(priv);
1530 }
1531
1532 #define MAX_UCODE_BEACON_INTERVAL       4096
1533 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1534
1535 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1536 {
1537         u16 new_val = 0;
1538         u16 beacon_factor = 0;
1539
1540         beacon_factor =
1541             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1542                 / MAX_UCODE_BEACON_INTERVAL;
1543         new_val = beacon_val / beacon_factor;
1544
1545         return cpu_to_le16(new_val);
1546 }
1547
1548 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1549 {
1550         u64 interval_tm_unit;
1551         u64 tsf, result;
1552         unsigned long flags;
1553         struct ieee80211_conf *conf = NULL;
1554         u16 beacon_int = 0;
1555
1556         conf = ieee80211_get_hw_conf(priv->hw);
1557
1558         spin_lock_irqsave(&priv->lock, flags);
1559         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1560         priv->rxon_timing.timestamp.dw[0] =
1561                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1562
1563         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1564
1565         tsf = priv->timestamp;
1566
1567         beacon_int = priv->beacon_int;
1568         spin_unlock_irqrestore(&priv->lock, flags);
1569
1570         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1571                 if (beacon_int == 0) {
1572                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1573                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1574                 } else {
1575                         priv->rxon_timing.beacon_interval =
1576                                 cpu_to_le16(beacon_int);
1577                         priv->rxon_timing.beacon_interval =
1578                             iwl4965_adjust_beacon_interval(
1579                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1580                 }
1581
1582                 priv->rxon_timing.atim_window = 0;
1583         } else {
1584                 priv->rxon_timing.beacon_interval =
1585                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1586                 /* TODO: we need to get atim_window from upper stack
1587                  * for now we set to 0 */
1588                 priv->rxon_timing.atim_window = 0;
1589         }
1590
1591         interval_tm_unit =
1592                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1593         result = do_div(tsf, interval_tm_unit);
1594         priv->rxon_timing.beacon_init_val =
1595             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1596
1597         IWL_DEBUG_ASSOC
1598             ("beacon interval %d beacon timer %d beacon tim %d\n",
1599                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1600                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1601                 le16_to_cpu(priv->rxon_timing.atim_window));
1602 }
1603
1604 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1605 {
1606         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1607                 IWL_ERROR("APs don't scan.\n");
1608                 return 0;
1609         }
1610
1611         if (!iwl_is_ready_rf(priv)) {
1612                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1613                 return -EIO;
1614         }
1615
1616         if (test_bit(STATUS_SCANNING, &priv->status)) {
1617                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1618                 return -EAGAIN;
1619         }
1620
1621         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1622                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1623                                "Queuing.\n");
1624                 return -EAGAIN;
1625         }
1626
1627         IWL_DEBUG_INFO("Starting scan...\n");
1628         priv->scan_bands = 2;
1629         set_bit(STATUS_SCANNING, &priv->status);
1630         priv->scan_start = jiffies;
1631         priv->scan_pass_start = priv->scan_start;
1632
1633         queue_work(priv->workqueue, &priv->request_scan);
1634
1635         return 0;
1636 }
1637
1638
1639 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1640                                           enum ieee80211_band band)
1641 {
1642         if (band == IEEE80211_BAND_5GHZ) {
1643                 priv->staging_rxon.flags &=
1644                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1645                       | RXON_FLG_CCK_MSK);
1646                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1647         } else {
1648                 /* Copied from iwl4965_post_associate() */
1649                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1650                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1651                 else
1652                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1653
1654                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1655                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1656
1657                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1658                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1659                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1660         }
1661 }
1662
1663 /*
1664  * initialize rxon structure with default values from eeprom
1665  */
1666 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1667 {
1668         const struct iwl_channel_info *ch_info;
1669
1670         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1671
1672         switch (priv->iw_mode) {
1673         case IEEE80211_IF_TYPE_AP:
1674                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1675                 break;
1676
1677         case IEEE80211_IF_TYPE_STA:
1678                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1679                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1680                 break;
1681
1682         case IEEE80211_IF_TYPE_IBSS:
1683                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1684                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1685                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1686                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1687                 break;
1688
1689         case IEEE80211_IF_TYPE_MNTR:
1690                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1691                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1692                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1693                 break;
1694         default:
1695                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1696                 break;
1697         }
1698
1699 #if 0
1700         /* TODO:  Figure out when short_preamble would be set and cache from
1701          * that */
1702         if (!hw_to_local(priv->hw)->short_preamble)
1703                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1704         else
1705                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1706 #endif
1707
1708         ch_info = iwl_get_channel_info(priv, priv->band,
1709                                        le16_to_cpu(priv->staging_rxon.channel));
1710
1711         if (!ch_info)
1712                 ch_info = &priv->channel_info[0];
1713
1714         /*
1715          * in some case A channels are all non IBSS
1716          * in this case force B/G channel
1717          */
1718         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1719             !(is_channel_ibss(ch_info)))
1720                 ch_info = &priv->channel_info[0];
1721
1722         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1723         priv->band = ch_info->band;
1724
1725         iwl4965_set_flags_for_phymode(priv, priv->band);
1726
1727         priv->staging_rxon.ofdm_basic_rates =
1728             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1729         priv->staging_rxon.cck_basic_rates =
1730             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1731
1732         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1733                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1734         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1735         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1736         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1737         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1738         iwl4965_set_rxon_chain(priv);
1739 }
1740
1741 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1742 {
1743         if (mode == IEEE80211_IF_TYPE_IBSS) {
1744                 const struct iwl_channel_info *ch_info;
1745
1746                 ch_info = iwl_get_channel_info(priv,
1747                         priv->band,
1748                         le16_to_cpu(priv->staging_rxon.channel));
1749
1750                 if (!ch_info || !is_channel_ibss(ch_info)) {
1751                         IWL_ERROR("channel %d not IBSS channel\n",
1752                                   le16_to_cpu(priv->staging_rxon.channel));
1753                         return -EINVAL;
1754                 }
1755         }
1756
1757         priv->iw_mode = mode;
1758
1759         iwl4965_connection_init_rx_config(priv);
1760         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1761
1762         iwlcore_clear_stations_table(priv);
1763
1764         /* dont commit rxon if rf-kill is on*/
1765         if (!iwl_is_ready_rf(priv))
1766                 return -EAGAIN;
1767
1768         cancel_delayed_work(&priv->scan_check);
1769         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1770                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1771                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1772                 return -EAGAIN;
1773         }
1774
1775         iwl4965_commit_rxon(priv);
1776
1777         return 0;
1778 }
1779
1780 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1781                                       struct ieee80211_tx_control *ctl,
1782                                       struct iwl_cmd *cmd,
1783                                       struct sk_buff *skb_frag,
1784                                       int sta_id)
1785 {
1786         struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1787         struct iwl_wep_key *wepkey;
1788         int keyidx = 0;
1789
1790         BUG_ON(ctl->hw_key->hw_key_idx > 3);
1791
1792         switch (keyinfo->alg) {
1793         case ALG_CCMP:
1794                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1795                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1796                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1797                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1798                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1799                 break;
1800
1801         case ALG_TKIP:
1802                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1803                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1804                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1805                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1806                 break;
1807
1808         case ALG_WEP:
1809                 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1810                 cmd->cmd.tx.sec_ctl = 0;
1811                 if (priv->default_wep_key) {
1812                         /* the WEP key was sent as static */
1813                         keyidx = ctl->hw_key->hw_key_idx;
1814                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1815                                                         wepkey->key_size);
1816                         if (wepkey->key_size == WEP_KEY_LEN_128)
1817                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1818                 } else {
1819                         /* the WEP key was sent as dynamic */
1820                         keyidx = keyinfo->keyidx;
1821                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1822                                                         keyinfo->keylen);
1823                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1824                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1825                 }
1826
1827                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1828                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1829
1830                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1831                              "with key %d\n", keyidx);
1832                 break;
1833
1834         default:
1835                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1836                 break;
1837         }
1838 }
1839
1840 /*
1841  * handle build REPLY_TX command notification.
1842  */
1843 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1844                                   struct iwl_cmd *cmd,
1845                                   struct ieee80211_tx_control *ctrl,
1846                                   struct ieee80211_hdr *hdr,
1847                                   int is_unicast, u8 std_id)
1848 {
1849         __le16 *qc;
1850         u16 fc = le16_to_cpu(hdr->frame_control);
1851         __le32 tx_flags = cmd->cmd.tx.tx_flags;
1852
1853         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1854         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1855                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1856                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1857                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1858                 if (ieee80211_is_probe_response(fc) &&
1859                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1860                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1861         } else {
1862                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1863                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1864         }
1865
1866         if (ieee80211_is_back_request(fc))
1867                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1868
1869
1870         cmd->cmd.tx.sta_id = std_id;
1871         if (ieee80211_get_morefrag(hdr))
1872                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1873
1874         qc = ieee80211_get_qos_ctrl(hdr);
1875         if (qc) {
1876                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
1877                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1878         } else
1879                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1880
1881         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
1882                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1883                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1884         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
1885                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1886                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1887         }
1888
1889         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1890                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1891
1892         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1893         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1894                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
1895                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
1896                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
1897                 else
1898                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
1899         } else {
1900                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
1901         }
1902
1903         cmd->cmd.tx.driver_txop = 0;
1904         cmd->cmd.tx.tx_flags = tx_flags;
1905         cmd->cmd.tx.next_frame_len = 0;
1906 }
1907 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
1908 {
1909         /* 0 - mgmt, 1 - cnt, 2 - data */
1910         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
1911         priv->tx_stats[idx].cnt++;
1912         priv->tx_stats[idx].bytes += len;
1913 }
1914 /**
1915  * iwl4965_get_sta_id - Find station's index within station table
1916  *
1917  * If new IBSS station, create new entry in station table
1918  */
1919 static int iwl4965_get_sta_id(struct iwl_priv *priv,
1920                                 struct ieee80211_hdr *hdr)
1921 {
1922         int sta_id;
1923         u16 fc = le16_to_cpu(hdr->frame_control);
1924         DECLARE_MAC_BUF(mac);
1925
1926         /* If this frame is broadcast or management, use broadcast station id */
1927         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1928             is_multicast_ether_addr(hdr->addr1))
1929                 return priv->hw_params.bcast_sta_id;
1930
1931         switch (priv->iw_mode) {
1932
1933         /* If we are a client station in a BSS network, use the special
1934          * AP station entry (that's the only station we communicate with) */
1935         case IEEE80211_IF_TYPE_STA:
1936                 return IWL_AP_ID;
1937
1938         /* If we are an AP, then find the station, or use BCAST */
1939         case IEEE80211_IF_TYPE_AP:
1940                 sta_id = iwl_find_station(priv, hdr->addr1);
1941                 if (sta_id != IWL_INVALID_STATION)
1942                         return sta_id;
1943                 return priv->hw_params.bcast_sta_id;
1944
1945         /* If this frame is going out to an IBSS network, find the station,
1946          * or create a new station table entry */
1947         case IEEE80211_IF_TYPE_IBSS:
1948                 sta_id = iwl_find_station(priv, hdr->addr1);
1949                 if (sta_id != IWL_INVALID_STATION)
1950                         return sta_id;
1951
1952                 /* Create new station table entry */
1953                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
1954                                                    0, CMD_ASYNC, NULL);
1955
1956                 if (sta_id != IWL_INVALID_STATION)
1957                         return sta_id;
1958
1959                 IWL_DEBUG_DROP("Station %s not in station map. "
1960                                "Defaulting to broadcast...\n",
1961                                print_mac(mac, hdr->addr1));
1962                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1963                 return priv->hw_params.bcast_sta_id;
1964
1965         default:
1966                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
1967                 return priv->hw_params.bcast_sta_id;
1968         }
1969 }
1970
1971 /*
1972  * start REPLY_TX command process
1973  */
1974 static int iwl4965_tx_skb(struct iwl_priv *priv,
1975                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
1976 {
1977         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1978         struct iwl4965_tfd_frame *tfd;
1979         u32 *control_flags;
1980         int txq_id = ctl->queue;
1981         struct iwl4965_tx_queue *txq = NULL;
1982         struct iwl4965_queue *q = NULL;
1983         dma_addr_t phys_addr;
1984         dma_addr_t txcmd_phys;
1985         dma_addr_t scratch_phys;
1986         struct iwl_cmd *out_cmd = NULL;
1987         u16 len, idx, len_org;
1988         u8 id, hdr_len, unicast;
1989         u8 sta_id;
1990         u16 seq_number = 0;
1991         u16 fc;
1992         __le16 *qc;
1993         u8 wait_write_ptr = 0;
1994         unsigned long flags;
1995         int rc;
1996
1997         spin_lock_irqsave(&priv->lock, flags);
1998         if (iwl_is_rfkill(priv)) {
1999                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2000                 goto drop_unlock;
2001         }
2002
2003         if (!priv->vif) {
2004                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2005                 goto drop_unlock;
2006         }
2007
2008         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2009                 IWL_ERROR("ERROR: No TX rate available.\n");
2010                 goto drop_unlock;
2011         }
2012
2013         unicast = !is_multicast_ether_addr(hdr->addr1);
2014         id = 0;
2015
2016         fc = le16_to_cpu(hdr->frame_control);
2017
2018 #ifdef CONFIG_IWLWIFI_DEBUG
2019         if (ieee80211_is_auth(fc))
2020                 IWL_DEBUG_TX("Sending AUTH frame\n");
2021         else if (ieee80211_is_assoc_request(fc))
2022                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2023         else if (ieee80211_is_reassoc_request(fc))
2024                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2025 #endif
2026
2027         /* drop all data frame if we are not associated */
2028         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2029            (!iwl_is_associated(priv) ||
2030             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2031             !priv->assoc_station_added)) {
2032                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2033                 goto drop_unlock;
2034         }
2035
2036         spin_unlock_irqrestore(&priv->lock, flags);
2037
2038         hdr_len = ieee80211_get_hdrlen(fc);
2039
2040         /* Find (or create) index into station table for destination station */
2041         sta_id = iwl4965_get_sta_id(priv, hdr);
2042         if (sta_id == IWL_INVALID_STATION) {
2043                 DECLARE_MAC_BUF(mac);
2044
2045                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2046                                print_mac(mac, hdr->addr1));
2047                 goto drop;
2048         }
2049
2050         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2051
2052         qc = ieee80211_get_qos_ctrl(hdr);
2053         if (qc) {
2054                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2055                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2056                                 IEEE80211_SCTL_SEQ;
2057                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2058                         (hdr->seq_ctrl &
2059                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2060                 seq_number += 0x10;
2061 #ifdef CONFIG_IWL4965_HT
2062                 /* aggregation is on for this <sta,tid> */
2063                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2064                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2065                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2066 #endif /* CONFIG_IWL4965_HT */
2067         }
2068
2069         /* Descriptor for chosen Tx queue */
2070         txq = &priv->txq[txq_id];
2071         q = &txq->q;
2072
2073         spin_lock_irqsave(&priv->lock, flags);
2074
2075         /* Set up first empty TFD within this queue's circular TFD buffer */
2076         tfd = &txq->bd[q->write_ptr];
2077         memset(tfd, 0, sizeof(*tfd));
2078         control_flags = (u32 *) tfd;
2079         idx = get_cmd_index(q, q->write_ptr, 0);
2080
2081         /* Set up driver data for this TFD */
2082         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2083         txq->txb[q->write_ptr].skb[0] = skb;
2084         memcpy(&(txq->txb[q->write_ptr].status.control),
2085                ctl, sizeof(struct ieee80211_tx_control));
2086
2087         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2088         out_cmd = &txq->cmd[idx];
2089         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2090         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2091
2092         /*
2093          * Set up the Tx-command (not MAC!) header.
2094          * Store the chosen Tx queue and TFD index within the sequence field;
2095          * after Tx, uCode's Tx response will return this value so driver can
2096          * locate the frame within the tx queue and do post-tx processing.
2097          */
2098         out_cmd->hdr.cmd = REPLY_TX;
2099         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2100                                 INDEX_TO_SEQ(q->write_ptr)));
2101
2102         /* Copy MAC header from skb into command buffer */
2103         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2104
2105         /*
2106          * Use the first empty entry in this queue's command buffer array
2107          * to contain the Tx command and MAC header concatenated together
2108          * (payload data will be in another buffer).
2109          * Size of this varies, due to varying MAC header length.
2110          * If end is not dword aligned, we'll have 2 extra bytes at the end
2111          * of the MAC header (device reads on dword boundaries).
2112          * We'll tell device about this padding later.
2113          */
2114         len = priv->hw_params.tx_cmd_len +
2115                 sizeof(struct iwl_cmd_header) + hdr_len;
2116
2117         len_org = len;
2118         len = (len + 3) & ~3;
2119
2120         if (len_org != len)
2121                 len_org = 1;
2122         else
2123                 len_org = 0;
2124
2125         /* Physical address of this Tx command's header (not MAC header!),
2126          * within command buffer array. */
2127         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2128                      offsetof(struct iwl_cmd, hdr);
2129
2130         /* Add buffer containing Tx command and MAC(!) header to TFD's
2131          * first entry */
2132         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2133
2134         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2135                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2136
2137         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2138          * if any (802.11 null frames have no payload). */
2139         len = skb->len - hdr_len;
2140         if (len) {
2141                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2142                                            len, PCI_DMA_TODEVICE);
2143                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2144         }
2145
2146         /* Tell 4965 about any 2-byte padding after MAC header */
2147         if (len_org)
2148                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2149
2150         /* Total # bytes to be transmitted */
2151         len = (u16)skb->len;
2152         out_cmd->cmd.tx.len = cpu_to_le16(len);
2153
2154         /* TODO need this for burst mode later on */
2155         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2156
2157         /* set is_hcca to 0; it probably will never be implemented */
2158         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2159
2160         iwl_update_tx_stats(priv, fc, len);
2161
2162         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2163                 offsetof(struct iwl4965_tx_cmd, scratch);
2164         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2165         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2166
2167         if (!ieee80211_get_morefrag(hdr)) {
2168                 txq->need_update = 1;
2169                 if (qc) {
2170                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2171                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2172                 }
2173         } else {
2174                 wait_write_ptr = 1;
2175                 txq->need_update = 0;
2176         }
2177
2178         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2179                            sizeof(out_cmd->cmd.tx));
2180
2181         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2182                            ieee80211_get_hdrlen(fc));
2183
2184         /* Set up entry for this TFD in Tx byte-count array */
2185         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2186
2187         /* Tell device the write index *just past* this latest filled TFD */
2188         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2189         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2190         spin_unlock_irqrestore(&priv->lock, flags);
2191
2192         if (rc)
2193                 return rc;
2194
2195         if ((iwl4965_queue_space(q) < q->high_mark)
2196             && priv->mac80211_registered) {
2197                 if (wait_write_ptr) {
2198                         spin_lock_irqsave(&priv->lock, flags);
2199                         txq->need_update = 1;
2200                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2201                         spin_unlock_irqrestore(&priv->lock, flags);
2202                 }
2203
2204                 ieee80211_stop_queue(priv->hw, ctl->queue);
2205         }
2206
2207         return 0;
2208
2209 drop_unlock:
2210         spin_unlock_irqrestore(&priv->lock, flags);
2211 drop:
2212         return -1;
2213 }
2214
2215 static void iwl4965_set_rate(struct iwl_priv *priv)
2216 {
2217         const struct ieee80211_supported_band *hw = NULL;
2218         struct ieee80211_rate *rate;
2219         int i;
2220
2221         hw = iwl_get_hw_mode(priv, priv->band);
2222         if (!hw) {
2223                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2224                 return;
2225         }
2226
2227         priv->active_rate = 0;
2228         priv->active_rate_basic = 0;
2229
2230         for (i = 0; i < hw->n_bitrates; i++) {
2231                 rate = &(hw->bitrates[i]);
2232                 if (rate->hw_value < IWL_RATE_COUNT)
2233                         priv->active_rate |= (1 << rate->hw_value);
2234         }
2235
2236         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2237                        priv->active_rate, priv->active_rate_basic);
2238
2239         /*
2240          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2241          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2242          * OFDM
2243          */
2244         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2245                 priv->staging_rxon.cck_basic_rates =
2246                     ((priv->active_rate_basic &
2247                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2248         else
2249                 priv->staging_rxon.cck_basic_rates =
2250                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2251
2252         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2253                 priv->staging_rxon.ofdm_basic_rates =
2254                     ((priv->active_rate_basic &
2255                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2256                       IWL_FIRST_OFDM_RATE) & 0xFF;
2257         else
2258                 priv->staging_rxon.ofdm_basic_rates =
2259                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2260 }
2261
2262 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2263 {
2264         unsigned long flags;
2265
2266         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2267                 return;
2268
2269         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2270                           disable_radio ? "OFF" : "ON");
2271
2272         if (disable_radio) {
2273                 iwl4965_scan_cancel(priv);
2274                 /* FIXME: This is a workaround for AP */
2275                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2276                         spin_lock_irqsave(&priv->lock, flags);
2277                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2278                                     CSR_UCODE_SW_BIT_RFKILL);
2279                         spin_unlock_irqrestore(&priv->lock, flags);
2280                         /* call the host command only if no hw rf-kill set */
2281                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2282                             iwl_is_ready(priv))
2283                                 iwl4965_send_card_state(priv,
2284                                                         CARD_STATE_CMD_DISABLE,
2285                                                         0);
2286                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2287
2288                         /* make sure mac80211 stop sending Tx frame */
2289                         if (priv->mac80211_registered)
2290                                 ieee80211_stop_queues(priv->hw);
2291                 }
2292                 return;
2293         }
2294
2295         spin_lock_irqsave(&priv->lock, flags);
2296         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2297
2298         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2299         spin_unlock_irqrestore(&priv->lock, flags);
2300
2301         /* wake up ucode */
2302         msleep(10);
2303
2304         spin_lock_irqsave(&priv->lock, flags);
2305         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2306         if (!iwl_grab_nic_access(priv))
2307                 iwl_release_nic_access(priv);
2308         spin_unlock_irqrestore(&priv->lock, flags);
2309
2310         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2311                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2312                                   "disabled by HW switch\n");
2313                 return;
2314         }
2315
2316         queue_work(priv->workqueue, &priv->restart);
2317         return;
2318 }
2319
2320 #define IWL_PACKET_RETRY_TIME HZ
2321
2322 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2323 {
2324         u16 sc = le16_to_cpu(header->seq_ctrl);
2325         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2326         u16 frag = sc & IEEE80211_SCTL_FRAG;
2327         u16 *last_seq, *last_frag;
2328         unsigned long *last_time;
2329
2330         switch (priv->iw_mode) {
2331         case IEEE80211_IF_TYPE_IBSS:{
2332                 struct list_head *p;
2333                 struct iwl4965_ibss_seq *entry = NULL;
2334                 u8 *mac = header->addr2;
2335                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2336
2337                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2338                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2339                         if (!compare_ether_addr(entry->mac, mac))
2340                                 break;
2341                 }
2342                 if (p == &priv->ibss_mac_hash[index]) {
2343                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2344                         if (!entry) {
2345                                 IWL_ERROR("Cannot malloc new mac entry\n");
2346                                 return 0;
2347                         }
2348                         memcpy(entry->mac, mac, ETH_ALEN);
2349                         entry->seq_num = seq;
2350                         entry->frag_num = frag;
2351                         entry->packet_time = jiffies;
2352                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2353                         return 0;
2354                 }
2355                 last_seq = &entry->seq_num;
2356                 last_frag = &entry->frag_num;
2357                 last_time = &entry->packet_time;
2358                 break;
2359         }
2360         case IEEE80211_IF_TYPE_STA:
2361                 last_seq = &priv->last_seq_num;
2362                 last_frag = &priv->last_frag_num;
2363                 last_time = &priv->last_packet_time;
2364                 break;
2365         default:
2366                 return 0;
2367         }
2368         if ((*last_seq == seq) &&
2369             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2370                 if (*last_frag == frag)
2371                         goto drop;
2372                 if (*last_frag + 1 != frag)
2373                         /* out-of-order fragment */
2374                         goto drop;
2375         } else
2376                 *last_seq = seq;
2377
2378         *last_frag = frag;
2379         *last_time = jiffies;
2380         return 0;
2381
2382  drop:
2383         return 1;
2384 }
2385
2386 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2387
2388 #include "iwl-spectrum.h"
2389
2390 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2391 #define BEACON_TIME_MASK_HIGH   0xFF000000
2392 #define TIME_UNIT               1024
2393
2394 /*
2395  * extended beacon time format
2396  * time in usec will be changed into a 32-bit value in 8:24 format
2397  * the high 1 byte is the beacon counts
2398  * the lower 3 bytes is the time in usec within one beacon interval
2399  */
2400
2401 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2402 {
2403         u32 quot;
2404         u32 rem;
2405         u32 interval = beacon_interval * 1024;
2406
2407         if (!interval || !usec)
2408                 return 0;
2409
2410         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2411         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2412
2413         return (quot << 24) + rem;
2414 }
2415
2416 /* base is usually what we get from ucode with each received frame,
2417  * the same as HW timer counter counting down
2418  */
2419
2420 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2421 {
2422         u32 base_low = base & BEACON_TIME_MASK_LOW;
2423         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2424         u32 interval = beacon_interval * TIME_UNIT;
2425         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2426             (addon & BEACON_TIME_MASK_HIGH);
2427
2428         if (base_low > addon_low)
2429                 res += base_low - addon_low;
2430         else if (base_low < addon_low) {
2431                 res += interval + base_low - addon_low;
2432                 res += (1 << 24);
2433         } else
2434                 res += (1 << 24);
2435
2436         return cpu_to_le32(res);
2437 }
2438
2439 static int iwl4965_get_measurement(struct iwl_priv *priv,
2440                                struct ieee80211_measurement_params *params,
2441                                u8 type)
2442 {
2443         struct iwl4965_spectrum_cmd spectrum;
2444         struct iwl4965_rx_packet *res;
2445         struct iwl_host_cmd cmd = {
2446                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2447                 .data = (void *)&spectrum,
2448                 .meta.flags = CMD_WANT_SKB,
2449         };
2450         u32 add_time = le64_to_cpu(params->start_time);
2451         int rc;
2452         int spectrum_resp_status;
2453         int duration = le16_to_cpu(params->duration);
2454
2455         if (iwl_is_associated(priv))
2456                 add_time =
2457                     iwl4965_usecs_to_beacons(
2458                         le64_to_cpu(params->start_time) - priv->last_tsf,
2459                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2460
2461         memset(&spectrum, 0, sizeof(spectrum));
2462
2463         spectrum.channel_count = cpu_to_le16(1);
2464         spectrum.flags =
2465             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2466         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2467         cmd.len = sizeof(spectrum);
2468         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2469
2470         if (iwl_is_associated(priv))
2471                 spectrum.start_time =
2472                     iwl4965_add_beacon_time(priv->last_beacon_time,
2473                                 add_time,
2474                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2475         else
2476                 spectrum.start_time = 0;
2477
2478         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2479         spectrum.channels[0].channel = params->channel;
2480         spectrum.channels[0].type = type;
2481         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2482                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2483                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2484
2485         rc = iwl_send_cmd_sync(priv, &cmd);
2486         if (rc)
2487                 return rc;
2488
2489         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2490         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2491                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2492                 rc = -EIO;
2493         }
2494
2495         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2496         switch (spectrum_resp_status) {
2497         case 0:         /* Command will be handled */
2498                 if (res->u.spectrum.id != 0xff) {
2499                         IWL_DEBUG_INFO
2500                             ("Replaced existing measurement: %d\n",
2501                              res->u.spectrum.id);
2502                         priv->measurement_status &= ~MEASUREMENT_READY;
2503                 }
2504                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2505                 rc = 0;
2506                 break;
2507
2508         case 1:         /* Command will not be handled */
2509                 rc = -EAGAIN;
2510                 break;
2511         }
2512
2513         dev_kfree_skb_any(cmd.meta.u.skb);
2514
2515         return rc;
2516 }
2517 #endif
2518
2519 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2520                                  struct iwl4965_tx_info *tx_sta)
2521 {
2522
2523         tx_sta->status.ack_signal = 0;
2524         tx_sta->status.excessive_retries = 0;
2525         tx_sta->status.queue_length = 0;
2526         tx_sta->status.queue_number = 0;
2527
2528         if (in_interrupt())
2529                 ieee80211_tx_status_irqsafe(priv->hw,
2530                                             tx_sta->skb[0], &(tx_sta->status));
2531         else
2532                 ieee80211_tx_status(priv->hw,
2533                                     tx_sta->skb[0], &(tx_sta->status));
2534
2535         tx_sta->skb[0] = NULL;
2536 }
2537
2538 /**
2539  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2540  *
2541  * When FW advances 'R' index, all entries between old and new 'R' index
2542  * need to be reclaimed. As result, some free space forms.  If there is
2543  * enough free space (> low mark), wake the stack that feeds us.
2544  */
2545 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2546 {
2547         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2548         struct iwl4965_queue *q = &txq->q;
2549         int nfreed = 0;
2550
2551         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2552                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2553                           "is out of range [0-%d] %d %d.\n", txq_id,
2554                           index, q->n_bd, q->write_ptr, q->read_ptr);
2555                 return 0;
2556         }
2557
2558         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2559                 q->read_ptr != index;
2560                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2561                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2562                         iwl4965_txstatus_to_ieee(priv,
2563                                         &(txq->txb[txq->q.read_ptr]));
2564                         iwl4965_hw_txq_free_tfd(priv, txq);
2565                 } else if (nfreed > 1) {
2566                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2567                                         q->write_ptr, q->read_ptr);
2568                         queue_work(priv->workqueue, &priv->restart);
2569                 }
2570                 nfreed++;
2571         }
2572
2573 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2574                         (txq_id != IWL_CMD_QUEUE_NUM) &&
2575                         priv->mac80211_registered)
2576                 ieee80211_wake_queue(priv->hw, txq_id); */
2577
2578
2579         return nfreed;
2580 }
2581
2582 static int iwl4965_is_tx_success(u32 status)
2583 {
2584         status &= TX_STATUS_MSK;
2585         return (status == TX_STATUS_SUCCESS)
2586             || (status == TX_STATUS_DIRECT_DONE);
2587 }
2588
2589 /******************************************************************************
2590  *
2591  * Generic RX handler implementations
2592  *
2593  ******************************************************************************/
2594 #ifdef CONFIG_IWL4965_HT
2595
2596 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2597                                     struct ieee80211_hdr *hdr)
2598 {
2599         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2600                 return IWL_AP_ID;
2601         else {
2602                 u8 *da = ieee80211_get_DA(hdr);
2603                 return iwl_find_station(priv, da);
2604         }
2605 }
2606
2607 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2608         struct iwl_priv *priv, int txq_id, int idx)
2609 {
2610         if (priv->txq[txq_id].txb[idx].skb[0])
2611                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2612                                 txb[idx].skb[0]->data;
2613         return NULL;
2614 }
2615
2616 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2617 {
2618         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2619                                 tx_resp->frame_count);
2620         return le32_to_cpu(*scd_ssn) & MAX_SN;
2621
2622 }
2623
2624 /**
2625  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2626  */
2627 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2628                                       struct iwl4965_ht_agg *agg,
2629                                       struct iwl4965_tx_resp_agg *tx_resp,
2630                                       u16 start_idx)
2631 {
2632         u16 status;
2633         struct agg_tx_status *frame_status = &tx_resp->status;
2634         struct ieee80211_tx_status *tx_status = NULL;
2635         struct ieee80211_hdr *hdr = NULL;
2636         int i, sh;
2637         int txq_id, idx;
2638         u16 seq;
2639
2640         if (agg->wait_for_ba)
2641                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2642
2643         agg->frame_count = tx_resp->frame_count;
2644         agg->start_idx = start_idx;
2645         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2646         agg->bitmap = 0;
2647
2648         /* # frames attempted by Tx command */
2649         if (agg->frame_count == 1) {
2650                 /* Only one frame was attempted; no block-ack will arrive */
2651                 status = le16_to_cpu(frame_status[0].status);
2652                 seq  = le16_to_cpu(frame_status[0].sequence);
2653                 idx = SEQ_TO_INDEX(seq);
2654                 txq_id = SEQ_TO_QUEUE(seq);
2655
2656                 /* FIXME: code repetition */
2657                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2658                                    agg->frame_count, agg->start_idx, idx);
2659
2660                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2661                 tx_status->retry_count = tx_resp->failure_frame;
2662                 tx_status->queue_number = status & 0xff;
2663                 tx_status->queue_length = tx_resp->failure_rts;
2664                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2665                 tx_status->flags = iwl4965_is_tx_success(status)?
2666                         IEEE80211_TX_STATUS_ACK : 0;
2667                 iwl4965_hwrate_to_tx_control(priv,
2668                                              le32_to_cpu(tx_resp->rate_n_flags),
2669                                              &tx_status->control);
2670                 /* FIXME: code repetition end */
2671
2672                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2673                                     status & 0xff, tx_resp->failure_frame);
2674                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2675                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2676
2677                 agg->wait_for_ba = 0;
2678         } else {
2679                 /* Two or more frames were attempted; expect block-ack */
2680                 u64 bitmap = 0;
2681                 int start = agg->start_idx;
2682
2683                 /* Construct bit-map of pending frames within Tx window */
2684                 for (i = 0; i < agg->frame_count; i++) {
2685                         u16 sc;
2686                         status = le16_to_cpu(frame_status[i].status);
2687                         seq  = le16_to_cpu(frame_status[i].sequence);
2688                         idx = SEQ_TO_INDEX(seq);
2689                         txq_id = SEQ_TO_QUEUE(seq);
2690
2691                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2692                                       AGG_TX_STATE_ABORT_MSK))
2693                                 continue;
2694
2695                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2696                                            agg->frame_count, txq_id, idx);
2697
2698                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2699
2700                         sc = le16_to_cpu(hdr->seq_ctrl);
2701                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2702                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2703                                           " idx=%d, seq_idx=%d, seq=%d\n",
2704                                           idx, SEQ_TO_SN(sc),
2705                                           hdr->seq_ctrl);
2706                                 return -1;
2707                         }
2708
2709                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2710                                            i, idx, SEQ_TO_SN(sc));
2711
2712                         sh = idx - start;
2713                         if (sh > 64) {
2714                                 sh = (start - idx) + 0xff;
2715                                 bitmap = bitmap << sh;
2716                                 sh = 0;
2717                                 start = idx;
2718                         } else if (sh < -64)
2719                                 sh  = 0xff - (start - idx);
2720                         else if (sh < 0) {
2721                                 sh = start - idx;
2722                                 start = idx;
2723                                 bitmap = bitmap << sh;
2724                                 sh = 0;
2725                         }
2726                         bitmap |= (1 << sh);
2727                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2728                                            start, (u32)(bitmap & 0xFFFFFFFF));
2729                 }
2730
2731                 agg->bitmap = bitmap;
2732                 agg->start_idx = start;
2733                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2734                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2735                                    agg->frame_count, agg->start_idx,
2736                                    (unsigned long long)agg->bitmap);
2737
2738                 if (bitmap)
2739                         agg->wait_for_ba = 1;
2740         }
2741         return 0;
2742 }
2743 #endif
2744
2745 /**
2746  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2747  */
2748 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2749                             struct iwl4965_rx_mem_buffer *rxb)
2750 {
2751         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2752         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2753         int txq_id = SEQ_TO_QUEUE(sequence);
2754         int index = SEQ_TO_INDEX(sequence);
2755         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2756         struct ieee80211_tx_status *tx_status;
2757         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2758         u32  status = le32_to_cpu(tx_resp->status);
2759 #ifdef CONFIG_IWL4965_HT
2760         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2761         struct ieee80211_hdr *hdr;
2762         __le16 *qc;
2763 #endif
2764
2765         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2766                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2767                           "is out of range [0-%d] %d %d\n", txq_id,
2768                           index, txq->q.n_bd, txq->q.write_ptr,
2769                           txq->q.read_ptr);
2770                 return;
2771         }
2772
2773 #ifdef CONFIG_IWL4965_HT
2774         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2775         qc = ieee80211_get_qos_ctrl(hdr);
2776
2777         if (qc)
2778                 tid = le16_to_cpu(*qc) & 0xf;
2779
2780         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2781         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2782                 IWL_ERROR("Station not known\n");
2783                 return;
2784         }
2785
2786         if (txq->sched_retry) {
2787                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2788                 struct iwl4965_ht_agg *agg = NULL;
2789
2790                 if (!qc)
2791                         return;
2792
2793                 agg = &priv->stations[sta_id].tid[tid].agg;
2794
2795                 iwl4965_tx_status_reply_tx(priv, agg,
2796                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2797
2798                 if ((tx_resp->frame_count == 1) &&
2799                     !iwl4965_is_tx_success(status)) {
2800                         /* TODO: send BAR */
2801                 }
2802
2803                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2804                         int freed;
2805                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2806                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2807                                            "%d index %d\n", scd_ssn , index);
2808                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2809                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2810
2811                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2812                             txq_id >= 0 && priv->mac80211_registered &&
2813                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2814                                 ieee80211_wake_queue(priv->hw, txq_id);
2815
2816                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2817                 }
2818         } else {
2819 #endif /* CONFIG_IWL4965_HT */
2820         tx_status = &(txq->txb[txq->q.read_ptr].status);
2821
2822         tx_status->retry_count = tx_resp->failure_frame;
2823         tx_status->queue_number = status;
2824         tx_status->queue_length = tx_resp->bt_kill_count;
2825         tx_status->queue_length |= tx_resp->failure_rts;
2826         tx_status->flags =
2827             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2828         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2829                                      &tx_status->control);
2830
2831         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2832                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2833                      status, le32_to_cpu(tx_resp->rate_n_flags),
2834                      tx_resp->failure_frame);
2835
2836         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2837         if (index != -1) {
2838                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2839 #ifdef CONFIG_IWL4965_HT
2840                 if (tid != MAX_TID_COUNT)
2841                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2842                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2843                         (txq_id >= 0) &&
2844                         priv->mac80211_registered)
2845                         ieee80211_wake_queue(priv->hw, txq_id);
2846                 if (tid != MAX_TID_COUNT)
2847                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2848 #endif
2849         }
2850 #ifdef CONFIG_IWL4965_HT
2851         }
2852 #endif /* CONFIG_IWL4965_HT */
2853
2854         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2855                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2856 }
2857
2858
2859 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2860                                struct iwl4965_rx_mem_buffer *rxb)
2861 {
2862         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2863         struct iwl4965_alive_resp *palive;
2864         struct delayed_work *pwork;
2865
2866         palive = &pkt->u.alive_frame;
2867
2868         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2869                        "0x%01X 0x%01X\n",
2870                        palive->is_valid, palive->ver_type,
2871                        palive->ver_subtype);
2872
2873         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2874                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2875                 memcpy(&priv->card_alive_init,
2876                        &pkt->u.alive_frame,
2877                        sizeof(struct iwl4965_init_alive_resp));
2878                 pwork = &priv->init_alive_start;
2879         } else {
2880                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2881                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2882                        sizeof(struct iwl4965_alive_resp));
2883                 pwork = &priv->alive_start;
2884         }
2885
2886         /* We delay the ALIVE response by 5ms to
2887          * give the HW RF Kill time to activate... */
2888         if (palive->is_valid == UCODE_VALID_OK)
2889                 queue_delayed_work(priv->workqueue, pwork,
2890                                    msecs_to_jiffies(5));
2891         else
2892                 IWL_WARNING("uCode did not respond OK.\n");
2893 }
2894
2895 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2896                                  struct iwl4965_rx_mem_buffer *rxb)
2897 {
2898         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2899
2900         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2901         return;
2902 }
2903
2904 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2905                                struct iwl4965_rx_mem_buffer *rxb)
2906 {
2907         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2908
2909         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2910                 "seq 0x%04X ser 0x%08X\n",
2911                 le32_to_cpu(pkt->u.err_resp.error_type),
2912                 get_cmd_string(pkt->u.err_resp.cmd_id),
2913                 pkt->u.err_resp.cmd_id,
2914                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2915                 le32_to_cpu(pkt->u.err_resp.error_info));
2916 }
2917
2918 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2919
2920 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
2921 {
2922         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2923         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2924         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2925         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2926                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2927         rxon->channel = csa->channel;
2928         priv->staging_rxon.channel = csa->channel;
2929 }
2930
2931 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2932                                           struct iwl4965_rx_mem_buffer *rxb)
2933 {
2934 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2935         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2936         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2937
2938         if (!report->state) {
2939                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2940                           "Spectrum Measure Notification: Start\n");
2941                 return;
2942         }
2943
2944         memcpy(&priv->measure_report, report, sizeof(*report));
2945         priv->measurement_status |= MEASUREMENT_READY;
2946 #endif
2947 }
2948
2949 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2950                                   struct iwl4965_rx_mem_buffer *rxb)
2951 {
2952 #ifdef CONFIG_IWLWIFI_DEBUG
2953         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2954         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2955         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2956                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2957 #endif
2958 }
2959
2960 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2961                                              struct iwl4965_rx_mem_buffer *rxb)
2962 {
2963         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2964         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2965                         "notification for %s:\n",
2966                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2967         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2968 }
2969
2970 static void iwl4965_bg_beacon_update(struct work_struct *work)
2971 {
2972         struct iwl_priv *priv =
2973                 container_of(work, struct iwl_priv, beacon_update);
2974         struct sk_buff *beacon;
2975
2976         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2977         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2978
2979         if (!beacon) {
2980                 IWL_ERROR("update beacon failed\n");
2981                 return;
2982         }
2983
2984         mutex_lock(&priv->mutex);
2985         /* new beacon skb is allocated every time; dispose previous.*/
2986         if (priv->ibss_beacon)
2987                 dev_kfree_skb(priv->ibss_beacon);
2988
2989         priv->ibss_beacon = beacon;
2990         mutex_unlock(&priv->mutex);
2991
2992         iwl4965_send_beacon_cmd(priv);
2993 }
2994
2995 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2996                                 struct iwl4965_rx_mem_buffer *rxb)
2997 {
2998 #ifdef CONFIG_IWLWIFI_DEBUG
2999         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3000         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3001         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3002
3003         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3004                 "tsf %d %d rate %d\n",
3005                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3006                 beacon->beacon_notify_hdr.failure_frame,
3007                 le32_to_cpu(beacon->ibss_mgr_status),
3008                 le32_to_cpu(beacon->high_tsf),
3009                 le32_to_cpu(beacon->low_tsf), rate);
3010 #endif
3011
3012         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3013             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3014                 queue_work(priv->workqueue, &priv->beacon_update);
3015 }
3016
3017 /* Service response to REPLY_SCAN_CMD (0x80) */
3018 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3019                               struct iwl4965_rx_mem_buffer *rxb)
3020 {
3021 #ifdef CONFIG_IWLWIFI_DEBUG
3022         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3023         struct iwl4965_scanreq_notification *notif =
3024             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3025
3026         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3027 #endif
3028 }
3029
3030 /* Service SCAN_START_NOTIFICATION (0x82) */
3031 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3032                                     struct iwl4965_rx_mem_buffer *rxb)
3033 {
3034         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3035         struct iwl4965_scanstart_notification *notif =
3036             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3037         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3038         IWL_DEBUG_SCAN("Scan start: "
3039                        "%d [802.11%s] "
3040                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3041                        notif->channel,
3042                        notif->band ? "bg" : "a",
3043                        notif->tsf_high,
3044                        notif->tsf_low, notif->status, notif->beacon_timer);
3045 }
3046
3047 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3048 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3049                                       struct iwl4965_rx_mem_buffer *rxb)
3050 {
3051         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3052         struct iwl4965_scanresults_notification *notif =
3053             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3054
3055         IWL_DEBUG_SCAN("Scan ch.res: "
3056                        "%d [802.11%s] "
3057                        "(TSF: 0x%08X:%08X) - %d "
3058                        "elapsed=%lu usec (%dms since last)\n",
3059                        notif->channel,
3060                        notif->band ? "bg" : "a",
3061                        le32_to_cpu(notif->tsf_high),
3062                        le32_to_cpu(notif->tsf_low),
3063                        le32_to_cpu(notif->statistics[0]),
3064                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3065                        jiffies_to_msecs(elapsed_jiffies
3066                                         (priv->last_scan_jiffies, jiffies)));
3067
3068         priv->last_scan_jiffies = jiffies;
3069         priv->next_scan_jiffies = 0;
3070 }
3071
3072 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3073 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3074                                        struct iwl4965_rx_mem_buffer *rxb)
3075 {
3076         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3077         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3078
3079         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3080                        scan_notif->scanned_channels,
3081                        scan_notif->tsf_low,
3082                        scan_notif->tsf_high, scan_notif->status);
3083
3084         /* The HW is no longer scanning */
3085         clear_bit(STATUS_SCAN_HW, &priv->status);
3086
3087         /* The scan completion notification came in, so kill that timer... */
3088         cancel_delayed_work(&priv->scan_check);
3089
3090         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3091                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3092                        jiffies_to_msecs(elapsed_jiffies
3093                                         (priv->scan_pass_start, jiffies)));
3094
3095         /* Remove this scanned band from the list
3096          * of pending bands to scan */
3097         priv->scan_bands--;
3098
3099         /* If a request to abort was given, or the scan did not succeed
3100          * then we reset the scan state machine and terminate,
3101          * re-queuing another scan if one has been requested */
3102         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3103                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3104                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3105         } else {
3106                 /* If there are more bands on this scan pass reschedule */
3107                 if (priv->scan_bands > 0)
3108                         goto reschedule;
3109         }
3110
3111         priv->last_scan_jiffies = jiffies;
3112         priv->next_scan_jiffies = 0;
3113         IWL_DEBUG_INFO("Setting scan to off\n");
3114
3115         clear_bit(STATUS_SCANNING, &priv->status);
3116
3117         IWL_DEBUG_INFO("Scan took %dms\n",
3118                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3119
3120         queue_work(priv->workqueue, &priv->scan_completed);
3121
3122         return;
3123
3124 reschedule:
3125         priv->scan_pass_start = jiffies;
3126         queue_work(priv->workqueue, &priv->request_scan);
3127 }
3128
3129 /* Handle notification from uCode that card's power state is changing
3130  * due to software, hardware, or critical temperature RFKILL */
3131 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3132                                     struct iwl4965_rx_mem_buffer *rxb)
3133 {
3134         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3135         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3136         unsigned long status = priv->status;
3137
3138         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3139                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3140                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3141
3142         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3143                      RF_CARD_DISABLED)) {
3144
3145                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3146                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3147
3148                 if (!iwl_grab_nic_access(priv)) {
3149                         iwl_write_direct32(
3150                                 priv, HBUS_TARG_MBX_C,
3151                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3152
3153                         iwl_release_nic_access(priv);
3154                 }
3155
3156                 if (!(flags & RXON_CARD_DISABLED)) {
3157                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3158                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3159                         if (!iwl_grab_nic_access(priv)) {
3160                                 iwl_write_direct32(
3161                                         priv, HBUS_TARG_MBX_C,
3162                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3163
3164                                 iwl_release_nic_access(priv);
3165                         }
3166                 }
3167
3168                 if (flags & RF_CARD_DISABLED) {
3169                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3170                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3171                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3172                         if (!iwl_grab_nic_access(priv))
3173                                 iwl_release_nic_access(priv);
3174                 }
3175         }
3176
3177         if (flags & HW_CARD_DISABLED)
3178                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3179         else
3180                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3181
3182
3183         if (flags & SW_CARD_DISABLED)
3184                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3185         else
3186                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3187
3188         if (!(flags & RXON_CARD_DISABLED))
3189                 iwl4965_scan_cancel(priv);
3190
3191         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3192              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3193             (test_bit(STATUS_RF_KILL_SW, &status) !=
3194              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3195                 queue_work(priv->workqueue, &priv->rf_kill);
3196         else
3197                 wake_up_interruptible(&priv->wait_command_queue);
3198 }
3199
3200 /**
3201  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3202  *
3203  * Setup the RX handlers for each of the reply types sent from the uCode
3204  * to the host.
3205  *
3206  * This function chains into the hardware specific files for them to setup
3207  * any hardware specific handlers as well.
3208  */
3209 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3210 {
3211         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3212         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3213         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3214         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3215         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3216             iwl4965_rx_spectrum_measure_notif;
3217         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3218         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3219             iwl4965_rx_pm_debug_statistics_notif;
3220         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3221
3222         /*
3223          * The same handler is used for both the REPLY to a discrete
3224          * statistics request from the host as well as for the periodic
3225          * statistics notifications (after received beacons) from the uCode.
3226          */
3227         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3228         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3229
3230         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3231         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3232         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3233             iwl4965_rx_scan_results_notif;
3234         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3235             iwl4965_rx_scan_complete_notif;
3236         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3237         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3238
3239         /* Set up hardware specific Rx handlers */
3240         iwl4965_hw_rx_handler_setup(priv);
3241 }
3242
3243 /**
3244  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3245  * @rxb: Rx buffer to reclaim
3246  *
3247  * If an Rx buffer has an async callback associated with it the callback
3248  * will be executed.  The attached skb (if present) will only be freed
3249  * if the callback returns 1
3250  */
3251 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3252                                 struct iwl4965_rx_mem_buffer *rxb)
3253 {
3254         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3255         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3256         int txq_id = SEQ_TO_QUEUE(sequence);
3257         int index = SEQ_TO_INDEX(sequence);
3258         int huge = sequence & SEQ_HUGE_FRAME;
3259         int cmd_index;
3260         struct iwl_cmd *cmd;
3261
3262         /* If a Tx command is being handled and it isn't in the actual
3263          * command queue then there a command routing bug has been introduced
3264          * in the queue management code. */
3265         if (txq_id != IWL_CMD_QUEUE_NUM)
3266                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3267                           txq_id, pkt->hdr.cmd);
3268         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3269
3270         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3271         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3272
3273         /* Input error checking is done when commands are added to queue. */
3274         if (cmd->meta.flags & CMD_WANT_SKB) {
3275                 cmd->meta.source->u.skb = rxb->skb;
3276                 rxb->skb = NULL;
3277         } else if (cmd->meta.u.callback &&
3278                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3279                 rxb->skb = NULL;
3280
3281         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3282
3283         if (!(cmd->meta.flags & CMD_ASYNC)) {
3284                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3285                 wake_up_interruptible(&priv->wait_command_queue);
3286         }
3287 }
3288
3289 /************************** RX-FUNCTIONS ****************************/
3290 /*
3291  * Rx theory of operation
3292  *
3293  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3294  * each of which point to Receive Buffers to be filled by 4965.  These get
3295  * used not only for Rx frames, but for any command response or notification
3296  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3297  * of indexes into the circular buffer.
3298  *
3299  * Rx Queue Indexes
3300  * The host/firmware share two index registers for managing the Rx buffers.
3301  *
3302  * The READ index maps to the first position that the firmware may be writing
3303  * to -- the driver can read up to (but not including) this position and get
3304  * good data.
3305  * The READ index is managed by the firmware once the card is enabled.
3306  *
3307  * The WRITE index maps to the last position the driver has read from -- the
3308  * position preceding WRITE is the last slot the firmware can place a packet.
3309  *
3310  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3311  * WRITE = READ.
3312  *
3313  * During initialization, the host sets up the READ queue position to the first
3314  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3315  *
3316  * When the firmware places a packet in a buffer, it will advance the READ index
3317  * and fire the RX interrupt.  The driver can then query the READ index and
3318  * process as many packets as possible, moving the WRITE index forward as it
3319  * resets the Rx queue buffers with new memory.
3320  *
3321  * The management in the driver is as follows:
3322  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3323  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3324  *   to replenish the iwl->rxq->rx_free.
3325  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3326  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3327  *   'processed' and 'read' driver indexes as well)
3328  * + A received packet is processed and handed to the kernel network stack,
3329  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3330  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3331  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3332  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3333  *   were enough free buffers and RX_STALLED is set it is cleared.
3334  *
3335  *
3336  * Driver sequence:
3337  *
3338  * iwl4965_rx_queue_alloc()   Allocates rx_free
3339  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3340  *                            iwl4965_rx_queue_restock
3341  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3342  *                            queue, updates firmware pointers, and updates
3343  *                            the WRITE index.  If insufficient rx_free buffers
3344  *                            are available, schedules iwl4965_rx_replenish
3345  *
3346  * -- enable interrupts --
3347  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3348  *                            READ INDEX, detaching the SKB from the pool.
3349  *                            Moves the packet buffer from queue to rx_used.
3350  *                            Calls iwl4965_rx_queue_restock to refill any empty
3351  *                            slots.
3352  * ...
3353  *
3354  */
3355
3356 /**
3357  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3358  */
3359 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3360 {
3361         int s = q->read - q->write;
3362         if (s <= 0)
3363                 s += RX_QUEUE_SIZE;
3364         /* keep some buffer to not confuse full and empty queue */
3365         s -= 2;
3366         if (s < 0)
3367                 s = 0;
3368         return s;
3369 }
3370
3371 /**
3372  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3373  */
3374 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3375 {
3376         u32 reg = 0;
3377         int rc = 0;
3378         unsigned long flags;
3379
3380         spin_lock_irqsave(&q->lock, flags);
3381
3382         if (q->need_update == 0)
3383                 goto exit_unlock;
3384
3385         /* If power-saving is in use, make sure device is awake */
3386         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3387                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3388
3389                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3390                         iwl_set_bit(priv, CSR_GP_CNTRL,
3391                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3392                         goto exit_unlock;
3393                 }
3394
3395                 rc = iwl_grab_nic_access(priv);
3396                 if (rc)
3397                         goto exit_unlock;
3398
3399                 /* Device expects a multiple of 8 */
3400                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3401                                      q->write & ~0x7);
3402                 iwl_release_nic_access(priv);
3403
3404         /* Else device is assumed to be awake */
3405         } else
3406                 /* Device expects a multiple of 8 */
3407                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3408
3409
3410         q->need_update = 0;
3411
3412  exit_unlock:
3413         spin_unlock_irqrestore(&q->lock, flags);
3414         return rc;
3415 }
3416
3417 /**
3418  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3419  */
3420 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3421                                           dma_addr_t dma_addr)
3422 {
3423         return cpu_to_le32((u32)(dma_addr >> 8));
3424 }
3425
3426
3427 /**
3428  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3429  *
3430  * If there are slots in the RX queue that need to be restocked,
3431  * and we have free pre-allocated buffers, fill the ranks as much
3432  * as we can, pulling from rx_free.
3433  *
3434  * This moves the 'write' index forward to catch up with 'processed', and
3435  * also updates the memory address in the firmware to reference the new
3436  * target buffer.
3437  */
3438 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3439 {
3440         struct iwl4965_rx_queue *rxq = &priv->rxq;
3441         struct list_head *element;
3442         struct iwl4965_rx_mem_buffer *rxb;
3443         unsigned long flags;
3444         int write, rc;
3445
3446         spin_lock_irqsave(&rxq->lock, flags);
3447         write = rxq->write & ~0x7;
3448         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3449                 /* Get next free Rx buffer, remove from free list */
3450                 element = rxq->rx_free.next;
3451                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3452                 list_del(element);
3453
3454                 /* Point to Rx buffer via next RBD in circular buffer */
3455                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3456                 rxq->queue[rxq->write] = rxb;
3457                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3458                 rxq->free_count--;
3459         }
3460         spin_unlock_irqrestore(&rxq->lock, flags);
3461         /* If the pre-allocated buffer pool is dropping low, schedule to
3462          * refill it */
3463         if (rxq->free_count <= RX_LOW_WATERMARK)
3464                 queue_work(priv->workqueue, &priv->rx_replenish);
3465
3466
3467         /* If we've added more space for the firmware to place data, tell it.
3468          * Increment device's write pointer in multiples of 8. */
3469         if ((write != (rxq->write & ~0x7))
3470             || (abs(rxq->write - rxq->read) > 7)) {
3471                 spin_lock_irqsave(&rxq->lock, flags);
3472                 rxq->need_update = 1;
3473                 spin_unlock_irqrestore(&rxq->lock, flags);
3474                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3475                 if (rc)
3476                         return rc;
3477         }
3478
3479         return 0;
3480 }
3481
3482 /**
3483  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3484  *
3485  * When moving to rx_free an SKB is allocated for the slot.
3486  *
3487  * Also restock the Rx queue via iwl4965_rx_queue_restock.
3488  * This is called as a scheduled work item (except for during initialization)
3489  */
3490 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3491 {
3492         struct iwl4965_rx_queue *rxq = &priv->rxq;
3493         struct list_head *element;
3494         struct iwl4965_rx_mem_buffer *rxb;
3495         unsigned long flags;
3496         spin_lock_irqsave(&rxq->lock, flags);
3497         while (!list_empty(&rxq->rx_used)) {
3498                 element = rxq->rx_used.next;
3499                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3500
3501                 /* Alloc a new receive buffer */
3502                 rxb->skb =
3503                     alloc_skb(priv->hw_params.rx_buf_size,
3504                                 __GFP_NOWARN | GFP_ATOMIC);
3505                 if (!rxb->skb) {
3506                         if (net_ratelimit())
3507                                 printk(KERN_CRIT DRV_NAME
3508                                        ": Can not allocate SKB buffers\n");
3509                         /* We don't reschedule replenish work here -- we will
3510                          * call the restock method and if it still needs
3511                          * more buffers it will schedule replenish */
3512                         break;
3513                 }
3514                 priv->alloc_rxb_skb++;
3515                 list_del(element);
3516
3517                 /* Get physical address of RB/SKB */
3518                 rxb->dma_addr =
3519                     pci_map_single(priv->pci_dev, rxb->skb->data,
3520                            priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3521                 list_add_tail(&rxb->list, &rxq->rx_free);
3522                 rxq->free_count++;
3523         }
3524         spin_unlock_irqrestore(&rxq->lock, flags);
3525 }
3526
3527 /*
3528  * this should be called while priv->lock is locked
3529 */
3530 static void __iwl4965_rx_replenish(void *data)
3531 {
3532         struct iwl_priv *priv = data;
3533
3534         iwl4965_rx_allocate(priv);
3535         iwl4965_rx_queue_restock(priv);
3536 }
3537
3538
3539 void iwl4965_rx_replenish(void *data)
3540 {
3541         struct iwl_priv *priv = data;
3542         unsigned long flags;
3543
3544         iwl4965_rx_allocate(priv);
3545
3546         spin_lock_irqsave(&priv->lock, flags);
3547         iwl4965_rx_queue_restock(priv);
3548         spin_unlock_irqrestore(&priv->lock, flags);
3549 }
3550
3551 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3552  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3553  * This free routine walks the list of POOL entries and if SKB is set to
3554  * non NULL it is unmapped and freed
3555  */
3556 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3557 {
3558         int i;
3559         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3560                 if (rxq->pool[i].skb != NULL) {
3561                         pci_unmap_single(priv->pci_dev,
3562                                          rxq->pool[i].dma_addr,
3563                                          priv->hw_params.rx_buf_size,
3564                                          PCI_DMA_FROMDEVICE);
3565                         dev_kfree_skb(rxq->pool[i].skb);
3566                 }
3567         }
3568
3569         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3570                             rxq->dma_addr);
3571         rxq->bd = NULL;
3572 }
3573
3574 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3575 {
3576         struct iwl4965_rx_queue *rxq = &priv->rxq;
3577         struct pci_dev *dev = priv->pci_dev;
3578         int i;
3579
3580         spin_lock_init(&rxq->lock);
3581         INIT_LIST_HEAD(&rxq->rx_free);
3582         INIT_LIST_HEAD(&rxq->rx_used);
3583
3584         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3585         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3586         if (!rxq->bd)
3587                 return -ENOMEM;
3588
3589         /* Fill the rx_used queue with _all_ of the Rx buffers */
3590         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3591                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3592
3593         /* Set us so that we have processed and used all buffers, but have
3594          * not restocked the Rx queue with fresh buffers */
3595         rxq->read = rxq->write = 0;
3596         rxq->free_count = 0;
3597         rxq->need_update = 0;
3598         return 0;
3599 }
3600
3601 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3602 {
3603         unsigned long flags;
3604         int i;
3605         spin_lock_irqsave(&rxq->lock, flags);
3606         INIT_LIST_HEAD(&rxq->rx_free);
3607         INIT_LIST_HEAD(&rxq->rx_used);
3608         /* Fill the rx_used queue with _all_ of the Rx buffers */
3609         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3610                 /* In the reset function, these buffers may have been allocated
3611                  * to an SKB, so we need to unmap and free potential storage */
3612                 if (rxq->pool[i].skb != NULL) {
3613                         pci_unmap_single(priv->pci_dev,
3614                                          rxq->pool[i].dma_addr,
3615                                          priv->hw_params.rx_buf_size,
3616                                          PCI_DMA_FROMDEVICE);
3617                         priv->alloc_rxb_skb--;
3618                         dev_kfree_skb(rxq->pool[i].skb);
3619                         rxq->pool[i].skb = NULL;
3620                 }
3621                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3622         }
3623
3624         /* Set us so that we have processed and used all buffers, but have
3625          * not restocked the Rx queue with fresh buffers */
3626         rxq->read = rxq->write = 0;
3627         rxq->free_count = 0;
3628         spin_unlock_irqrestore(&rxq->lock, flags);
3629 }
3630
3631 /* Convert linear signal-to-noise ratio into dB */
3632 static u8 ratio2dB[100] = {
3633 /*       0   1   2   3   4   5   6   7   8   9 */
3634          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3635         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3636         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3637         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3638         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3639         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3640         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3641         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3642         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3643         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3644 };
3645
3646 /* Calculates a relative dB value from a ratio of linear
3647  *   (i.e. not dB) signal levels.
3648  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3649 int iwl4965_calc_db_from_ratio(int sig_ratio)
3650 {
3651         /* 1000:1 or higher just report as 60 dB */
3652         if (sig_ratio >= 1000)
3653                 return 60;
3654
3655         /* 100:1 or higher, divide by 10 and use table,
3656          *   add 20 dB to make up for divide by 10 */
3657         if (sig_ratio >= 100)
3658                 return (20 + (int)ratio2dB[sig_ratio/10]);
3659
3660         /* We shouldn't see this */
3661         if (sig_ratio < 1)
3662                 return 0;
3663
3664         /* Use table for ratios 1:1 - 99:1 */
3665         return (int)ratio2dB[sig_ratio];
3666 }
3667
3668 #define PERFECT_RSSI (-20) /* dBm */
3669 #define WORST_RSSI (-95)   /* dBm */
3670 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3671
3672 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3673  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3674  *   about formulas used below. */
3675 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3676 {
3677         int sig_qual;
3678         int degradation = PERFECT_RSSI - rssi_dbm;
3679
3680         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3681          * as indicator; formula is (signal dbm - noise dbm).
3682          * SNR at or above 40 is a great signal (100%).
3683          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3684          * Weakest usable signal is usually 10 - 15 dB SNR. */
3685         if (noise_dbm) {
3686                 if (rssi_dbm - noise_dbm >= 40)
3687                         return 100;
3688                 else if (rssi_dbm < noise_dbm)
3689                         return 0;
3690                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3691
3692         /* Else use just the signal level.
3693          * This formula is a least squares fit of data points collected and
3694          *   compared with a reference system that had a percentage (%) display
3695          *   for signal quality. */
3696         } else
3697                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3698                             (15 * RSSI_RANGE + 62 * degradation)) /
3699                            (RSSI_RANGE * RSSI_RANGE);
3700
3701         if (sig_qual > 100)
3702                 sig_qual = 100;
3703         else if (sig_qual < 1)
3704                 sig_qual = 0;
3705
3706         return sig_qual;
3707 }
3708
3709 /**
3710  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3711  *
3712  * Uses the priv->rx_handlers callback function array to invoke
3713  * the appropriate handlers, including command responses,
3714  * frame-received notifications, and other notifications.
3715  */
3716 static void iwl4965_rx_handle(struct iwl_priv *priv)
3717 {
3718         struct iwl4965_rx_mem_buffer *rxb;
3719         struct iwl4965_rx_packet *pkt;
3720         struct iwl4965_rx_queue *rxq = &priv->rxq;
3721         u32 r, i;
3722         int reclaim;
3723         unsigned long flags;
3724         u8 fill_rx = 0;
3725         u32 count = 8;
3726
3727         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3728          * buffer that the driver may process (last buffer filled by ucode). */
3729         r = iwl4965_hw_get_rx_read(priv);
3730         i = rxq->read;
3731
3732         /* Rx interrupt, but nothing sent from uCode */
3733         if (i == r)
3734                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3735
3736         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3737                 fill_rx = 1;
3738
3739         while (i != r) {
3740                 rxb = rxq->queue[i];
3741
3742                 /* If an RXB doesn't have a Rx queue slot associated with it,
3743                  * then a bug has been introduced in the queue refilling
3744                  * routines -- catch it here */
3745                 BUG_ON(rxb == NULL);
3746
3747                 rxq->queue[i] = NULL;
3748
3749                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3750                                             priv->hw_params.rx_buf_size,
3751                                             PCI_DMA_FROMDEVICE);
3752                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3753
3754                 /* Reclaim a command buffer only if this packet is a response
3755                  *   to a (driver-originated) command.
3756                  * If the packet (e.g. Rx frame) originated from uCode,
3757                  *   there is no command buffer to reclaim.
3758                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3759                  *   but apparently a few don't get set; catch them here. */
3760                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3761                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3762                         (pkt->hdr.cmd != REPLY_RX) &&
3763                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3764                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3765                         (pkt->hdr.cmd != REPLY_TX);
3766
3767                 /* Based on type of command response or notification,
3768                  *   handle those that need handling via function in
3769                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3770                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3771                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3772                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3773                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3774                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3775                 } else {
3776                         /* No handling needed */
3777                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3778                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3779                                 r, i, get_cmd_string(pkt->hdr.cmd),
3780                                 pkt->hdr.cmd);
3781                 }
3782
3783                 if (reclaim) {
3784                         /* Invoke any callbacks, transfer the skb to caller, and
3785                          * fire off the (possibly) blocking iwl_send_cmd()
3786                          * as we reclaim the driver command queue */
3787                         if (rxb && rxb->skb)
3788                                 iwl4965_tx_cmd_complete(priv, rxb);
3789                         else
3790                                 IWL_WARNING("Claim null rxb?\n");
3791                 }
3792
3793                 /* For now we just don't re-use anything.  We can tweak this
3794                  * later to try and re-use notification packets and SKBs that
3795                  * fail to Rx correctly */
3796                 if (rxb->skb != NULL) {
3797                         priv->alloc_rxb_skb--;
3798                         dev_kfree_skb_any(rxb->skb);
3799                         rxb->skb = NULL;
3800                 }
3801
3802                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3803                                  priv->hw_params.rx_buf_size,
3804                                  PCI_DMA_FROMDEVICE);
3805                 spin_lock_irqsave(&rxq->lock, flags);
3806                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3807                 spin_unlock_irqrestore(&rxq->lock, flags);
3808                 i = (i + 1) & RX_QUEUE_MASK;
3809                 /* If there are a lot of unused frames,
3810                  * restock the Rx queue so ucode wont assert. */
3811                 if (fill_rx) {
3812                         count++;
3813                         if (count >= 8) {
3814                                 priv->rxq.read = i;
3815                                 __iwl4965_rx_replenish(priv);
3816                                 count = 0;
3817                         }
3818                 }
3819         }
3820
3821         /* Backtrack one entry */
3822         priv->rxq.read = i;
3823         iwl4965_rx_queue_restock(priv);
3824 }
3825
3826 /**
3827  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3828  */
3829 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3830                                   struct iwl4965_tx_queue *txq)
3831 {
3832         u32 reg = 0;
3833         int rc = 0;
3834         int txq_id = txq->q.id;
3835
3836         if (txq->need_update == 0)
3837                 return rc;
3838
3839         /* if we're trying to save power */
3840         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3841                 /* wake up nic if it's powered down ...
3842                  * uCode will wake up, and interrupt us again, so next
3843                  * time we'll skip this part. */
3844                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3845
3846                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3847                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3848                         iwl_set_bit(priv, CSR_GP_CNTRL,
3849                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3850                         return rc;
3851                 }
3852
3853                 /* restore this queue's parameters in nic hardware. */
3854                 rc = iwl_grab_nic_access(priv);
3855                 if (rc)
3856                         return rc;
3857                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3858                                      txq->q.write_ptr | (txq_id << 8));
3859                 iwl_release_nic_access(priv);
3860
3861         /* else not in power-save mode, uCode will never sleep when we're
3862          * trying to tx (during RFKILL, we're not trying to tx). */
3863         } else
3864                 iwl_write32(priv, HBUS_TARG_WRPTR,
3865                             txq->q.write_ptr | (txq_id << 8));
3866
3867         txq->need_update = 0;
3868
3869         return rc;
3870 }
3871
3872 #ifdef CONFIG_IWLWIFI_DEBUG
3873 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
3874 {
3875         DECLARE_MAC_BUF(mac);
3876
3877         IWL_DEBUG_RADIO("RX CONFIG:\n");
3878         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3879         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3880         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3881         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3882                         le32_to_cpu(rxon->filter_flags));
3883         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3884         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3885                         rxon->ofdm_basic_rates);
3886         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3887         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3888                         print_mac(mac, rxon->node_addr));
3889         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3890                         print_mac(mac, rxon->bssid_addr));
3891         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3892 }
3893 #endif
3894
3895 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3896 {
3897         IWL_DEBUG_ISR("Enabling interrupts\n");
3898         set_bit(STATUS_INT_ENABLED, &priv->status);
3899         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3900 }
3901
3902 /* call this function to flush any scheduled tasklet */
3903 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3904 {
3905         /* wait to make sure we flush pedding tasklet*/
3906         synchronize_irq(priv->pci_dev->irq);
3907         tasklet_kill(&priv->irq_tasklet);
3908 }
3909
3910 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3911 {
3912         clear_bit(STATUS_INT_ENABLED, &priv->status);
3913
3914         /* disable interrupts from uCode/NIC to host */
3915         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3916
3917         /* acknowledge/clear/reset any interrupts still pending
3918          * from uCode or flow handler (Rx/Tx DMA) */
3919         iwl_write32(priv, CSR_INT, 0xffffffff);
3920         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3921         IWL_DEBUG_ISR("Disabled interrupts\n");
3922 }
3923
3924 static const char *desc_lookup(int i)
3925 {
3926         switch (i) {
3927         case 1:
3928                 return "FAIL";
3929         case 2:
3930                 return "BAD_PARAM";
3931         case 3:
3932                 return "BAD_CHECKSUM";
3933         case 4:
3934                 return "NMI_INTERRUPT";
3935         case 5:
3936                 return "SYSASSERT";
3937         case 6:
3938                 return "FATAL_ERROR";
3939         }
3940
3941         return "UNKNOWN";
3942 }
3943
3944 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3945 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3946
3947 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3948 {
3949         u32 data2, line;
3950         u32 desc, time, count, base, data1;
3951         u32 blink1, blink2, ilink1, ilink2;
3952         int rc;
3953
3954         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3955
3956         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3957                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3958                 return;
3959         }
3960
3961         rc = iwl_grab_nic_access(priv);
3962         if (rc) {
3963                 IWL_WARNING("Can not read from adapter at this time.\n");
3964                 return;
3965         }
3966
3967         count = iwl_read_targ_mem(priv, base);
3968
3969         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3970                 IWL_ERROR("Start IWL Error Log Dump:\n");
3971                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3972         }
3973
3974         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3975         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3976         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3977         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3978         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3979         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3980         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3981         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3982         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3983
3984         IWL_ERROR("Desc               Time       "
3985                   "data1      data2      line\n");
3986         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3987                   desc_lookup(desc), desc, time, data1, data2, line);
3988         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
3989         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3990                   ilink1, ilink2);
3991
3992         iwl_release_nic_access(priv);
3993 }
3994
3995 #define EVENT_START_OFFSET  (4 * sizeof(u32))
3996
3997 /**
3998  * iwl4965_print_event_log - Dump error event log to syslog
3999  *
4000  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4001  */
4002 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4003                                 u32 num_events, u32 mode)
4004 {
4005         u32 i;
4006         u32 base;       /* SRAM byte address of event log header */
4007         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4008         u32 ptr;        /* SRAM byte address of log data */
4009         u32 ev, time, data; /* event log data */
4010
4011         if (num_events == 0)
4012                 return;
4013
4014         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4015
4016         if (mode == 0)
4017                 event_size = 2 * sizeof(u32);
4018         else
4019                 event_size = 3 * sizeof(u32);
4020
4021         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4022
4023         /* "time" is actually "data" for mode 0 (no timestamp).
4024          * place event id # at far right for easier visual parsing. */
4025         for (i = 0; i < num_events; i++) {
4026                 ev = iwl_read_targ_mem(priv, ptr);
4027                 ptr += sizeof(u32);
4028                 time = iwl_read_targ_mem(priv, ptr);
4029                 ptr += sizeof(u32);
4030                 if (mode == 0)
4031                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4032                 else {
4033                         data = iwl_read_targ_mem(priv, ptr);
4034                         ptr += sizeof(u32);
4035                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4036                 }
4037         }
4038 }
4039
4040 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4041 {
4042         int rc;
4043         u32 base;       /* SRAM byte address of event log header */
4044         u32 capacity;   /* event log capacity in # entries */
4045         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4046         u32 num_wraps;  /* # times uCode wrapped to top of log */
4047         u32 next_entry; /* index of next entry to be written by uCode */
4048         u32 size;       /* # entries that we'll print */
4049
4050         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4051         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4052                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4053                 return;
4054         }
4055
4056         rc = iwl_grab_nic_access(priv);
4057         if (rc) {
4058                 IWL_WARNING("Can not read from adapter at this time.\n");
4059                 return;
4060         }
4061
4062         /* event log header */
4063         capacity = iwl_read_targ_mem(priv, base);
4064         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4065         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4066         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4067
4068         size = num_wraps ? capacity : next_entry;
4069
4070         /* bail out if nothing in log */
4071         if (size == 0) {
4072                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4073                 iwl_release_nic_access(priv);
4074                 return;
4075         }
4076
4077         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4078                   size, num_wraps);
4079
4080         /* if uCode has wrapped back to top of log, start at the oldest entry,
4081          * i.e the next one that uCode would fill. */
4082         if (num_wraps)
4083                 iwl4965_print_event_log(priv, next_entry,
4084                                     capacity - next_entry, mode);
4085
4086         /* (then/else) start at top of log */
4087         iwl4965_print_event_log(priv, 0, next_entry, mode);
4088
4089         iwl_release_nic_access(priv);
4090 }
4091
4092 /**
4093  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4094  */
4095 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4096 {
4097         /* Set the FW error flag -- cleared on iwl4965_down */
4098         set_bit(STATUS_FW_ERROR, &priv->status);
4099
4100         /* Cancel currently queued command. */
4101         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4102
4103 #ifdef CONFIG_IWLWIFI_DEBUG
4104         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4105                 iwl4965_dump_nic_error_log(priv);
4106                 iwl4965_dump_nic_event_log(priv);
4107                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4108         }
4109 #endif
4110
4111         wake_up_interruptible(&priv->wait_command_queue);
4112
4113         /* Keep the restart process from trying to send host
4114          * commands by clearing the INIT status bit */
4115         clear_bit(STATUS_READY, &priv->status);
4116
4117         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4118                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4119                           "Restarting adapter due to uCode error.\n");
4120
4121                 if (iwl_is_associated(priv)) {
4122                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4123                                sizeof(priv->recovery_rxon));
4124                         priv->error_recovering = 1;
4125                 }
4126                 queue_work(priv->workqueue, &priv->restart);
4127         }
4128 }
4129
4130 static void iwl4965_error_recovery(struct iwl_priv *priv)
4131 {
4132         unsigned long flags;
4133
4134         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4135                sizeof(priv->staging_rxon));
4136         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4137         iwl4965_commit_rxon(priv);
4138
4139         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4140
4141         spin_lock_irqsave(&priv->lock, flags);
4142         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4143         priv->error_recovering = 0;
4144         spin_unlock_irqrestore(&priv->lock, flags);
4145 }
4146
4147 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4148 {
4149         u32 inta, handled = 0;
4150         u32 inta_fh;
4151         unsigned long flags;
4152 #ifdef CONFIG_IWLWIFI_DEBUG
4153         u32 inta_mask;
4154 #endif
4155
4156         spin_lock_irqsave(&priv->lock, flags);
4157
4158         /* Ack/clear/reset pending uCode interrupts.
4159          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4160          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4161         inta = iwl_read32(priv, CSR_INT);
4162         iwl_write32(priv, CSR_INT, inta);
4163
4164         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4165          * Any new interrupts that happen after this, either while we're
4166          * in this tasklet, or later, will show up in next ISR/tasklet. */
4167         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4168         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4169
4170 #ifdef CONFIG_IWLWIFI_DEBUG
4171         if (iwl_debug_level & IWL_DL_ISR) {
4172                 /* just for debug */
4173                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4174                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4175                               inta, inta_mask, inta_fh);
4176         }
4177 #endif
4178
4179         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4180          * atomic, make sure that inta covers all the interrupts that
4181          * we've discovered, even if FH interrupt came in just after
4182          * reading CSR_INT. */
4183         if (inta_fh & CSR49_FH_INT_RX_MASK)
4184                 inta |= CSR_INT_BIT_FH_RX;
4185         if (inta_fh & CSR49_FH_INT_TX_MASK)
4186                 inta |= CSR_INT_BIT_FH_TX;
4187
4188         /* Now service all interrupt bits discovered above. */
4189         if (inta & CSR_INT_BIT_HW_ERR) {
4190                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4191
4192                 /* Tell the device to stop sending interrupts */
4193                 iwl4965_disable_interrupts(priv);
4194
4195                 iwl4965_irq_handle_error(priv);
4196
4197                 handled |= CSR_INT_BIT_HW_ERR;
4198
4199                 spin_unlock_irqrestore(&priv->lock, flags);
4200
4201                 return;
4202         }
4203
4204 #ifdef CONFIG_IWLWIFI_DEBUG
4205         if (iwl_debug_level & (IWL_DL_ISR)) {
4206                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4207                 if (inta & CSR_INT_BIT_SCD)
4208                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4209                                       "the frame/frames.\n");
4210
4211                 /* Alive notification via Rx interrupt will do the real work */
4212                 if (inta & CSR_INT_BIT_ALIVE)
4213                         IWL_DEBUG_ISR("Alive interrupt\n");
4214         }
4215 #endif
4216         /* Safely ignore these bits for debug checks below */
4217         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4218
4219         /* HW RF KILL switch toggled */
4220         if (inta & CSR_INT_BIT_RF_KILL) {
4221                 int hw_rf_kill = 0;
4222                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4223                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4224                         hw_rf_kill = 1;
4225
4226                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4227                                 "RF_KILL bit toggled to %s.\n",
4228                                 hw_rf_kill ? "disable radio":"enable radio");
4229
4230                 /* Queue restart only if RF_KILL switch was set to "kill"
4231                  *   when we loaded driver, and is now set to "enable".
4232                  * After we're Alive, RF_KILL gets handled by
4233                  *   iwl4965_rx_card_state_notif() */
4234                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4235                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4236                         queue_work(priv->workqueue, &priv->restart);
4237                 }
4238
4239                 handled |= CSR_INT_BIT_RF_KILL;
4240         }
4241
4242         /* Chip got too hot and stopped itself */
4243         if (inta & CSR_INT_BIT_CT_KILL) {
4244                 IWL_ERROR("Microcode CT kill error detected.\n");
4245                 handled |= CSR_INT_BIT_CT_KILL;
4246         }
4247
4248         /* Error detected by uCode */
4249         if (inta & CSR_INT_BIT_SW_ERR) {
4250                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4251                           inta);
4252                 iwl4965_irq_handle_error(priv);
4253                 handled |= CSR_INT_BIT_SW_ERR;
4254         }
4255
4256         /* uCode wakes up after power-down sleep */
4257         if (inta & CSR_INT_BIT_WAKEUP) {
4258                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4259                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4260                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4261                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4262                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4263                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4264                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4265                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4266
4267                 handled |= CSR_INT_BIT_WAKEUP;
4268         }
4269
4270         /* All uCode command responses, including Tx command responses,
4271          * Rx "responses" (frame-received notification), and other
4272          * notifications from uCode come through here*/
4273         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4274                 iwl4965_rx_handle(priv);
4275                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4276         }
4277
4278         if (inta & CSR_INT_BIT_FH_TX) {
4279                 IWL_DEBUG_ISR("Tx interrupt\n");
4280                 handled |= CSR_INT_BIT_FH_TX;
4281         }
4282
4283         if (inta & ~handled)
4284                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4285
4286         if (inta & ~CSR_INI_SET_MASK) {
4287                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4288                          inta & ~CSR_INI_SET_MASK);
4289                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4290         }
4291
4292         /* Re-enable all interrupts */
4293         /* only Re-enable if diabled by irq */
4294         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4295                 iwl4965_enable_interrupts(priv);
4296
4297 #ifdef CONFIG_IWLWIFI_DEBUG
4298         if (iwl_debug_level & (IWL_DL_ISR)) {
4299                 inta = iwl_read32(priv, CSR_INT);
4300                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4301                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4302                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4303                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4304         }
4305 #endif
4306         spin_unlock_irqrestore(&priv->lock, flags);
4307 }
4308
4309 static irqreturn_t iwl4965_isr(int irq, void *data)
4310 {
4311         struct iwl_priv *priv = data;
4312         u32 inta, inta_mask;
4313         u32 inta_fh;
4314         if (!priv)
4315                 return IRQ_NONE;
4316
4317         spin_lock(&priv->lock);
4318
4319         /* Disable (but don't clear!) interrupts here to avoid
4320          *    back-to-back ISRs and sporadic interrupts from our NIC.
4321          * If we have something to service, the tasklet will re-enable ints.
4322          * If we *don't* have something, we'll re-enable before leaving here. */
4323         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4324         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4325
4326         /* Discover which interrupts are active/pending */
4327         inta = iwl_read32(priv, CSR_INT);
4328         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4329
4330         /* Ignore interrupt if there's nothing in NIC to service.
4331          * This may be due to IRQ shared with another device,
4332          * or due to sporadic interrupts thrown from our NIC. */
4333         if (!inta && !inta_fh) {
4334                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4335                 goto none;
4336         }
4337
4338         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4339                 /* Hardware disappeared. It might have already raised
4340                  * an interrupt */
4341                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4342                 goto unplugged;
4343         }
4344
4345         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4346                       inta, inta_mask, inta_fh);
4347
4348         inta &= ~CSR_INT_BIT_SCD;
4349
4350         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4351         if (likely(inta || inta_fh))
4352                 tasklet_schedule(&priv->irq_tasklet);
4353
4354  unplugged:
4355         spin_unlock(&priv->lock);
4356         return IRQ_HANDLED;
4357
4358  none:
4359         /* re-enable interrupts here since we don't have anything to service. */
4360         /* only Re-enable if diabled by irq */
4361         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4362                 iwl4965_enable_interrupts(priv);
4363         spin_unlock(&priv->lock);
4364         return IRQ_NONE;
4365 }
4366
4367 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4368  * sending probe req.  This should be set long enough to hear probe responses
4369  * from more than one AP.  */
4370 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4371 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4372
4373 /* For faster active scanning, scan will move to the next channel if fewer than
4374  * PLCP_QUIET_THRESH packets are heard on this channel within
4375  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4376  * time if it's a quiet channel (nothing responded to our probe, and there's
4377  * no other traffic).
4378  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4379 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4380 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4381
4382 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4383  * Must be set longer than active dwell time.
4384  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4385 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4386 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4387 #define IWL_PASSIVE_DWELL_BASE      (100)
4388 #define IWL_CHANNEL_TUNE_TIME       5
4389
4390 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4391                                                 enum ieee80211_band band)
4392 {
4393         if (band == IEEE80211_BAND_5GHZ)
4394                 return IWL_ACTIVE_DWELL_TIME_52;
4395         else
4396                 return IWL_ACTIVE_DWELL_TIME_24;
4397 }
4398
4399 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4400                                           enum ieee80211_band band)
4401 {
4402         u16 active = iwl4965_get_active_dwell_time(priv, band);
4403         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4404             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4405             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4406
4407         if (iwl_is_associated(priv)) {
4408                 /* If we're associated, we clamp the maximum passive
4409                  * dwell time to be 98% of the beacon interval (minus
4410                  * 2 * channel tune time) */
4411                 passive = priv->beacon_int;
4412                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4413                         passive = IWL_PASSIVE_DWELL_BASE;
4414                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4415         }
4416
4417         if (passive <= active)
4418                 passive = active + 1;
4419
4420         return passive;
4421 }
4422
4423 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4424                                          enum ieee80211_band band,
4425                                      u8 is_active, u8 direct_mask,
4426                                      struct iwl4965_scan_channel *scan_ch)
4427 {
4428         const struct ieee80211_channel *channels = NULL;
4429         const struct ieee80211_supported_band *sband;
4430         const struct iwl_channel_info *ch_info;
4431         u16 passive_dwell = 0;
4432         u16 active_dwell = 0;
4433         int added, i;
4434
4435         sband = iwl_get_hw_mode(priv, band);
4436         if (!sband)
4437                 return 0;
4438
4439         channels = sband->channels;
4440
4441         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4442         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4443
4444         for (i = 0, added = 0; i < sband->n_channels; i++) {
4445                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4446                         continue;
4447
4448                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4449
4450                 ch_info = iwl_get_channel_info(priv, band,
4451                                          scan_ch->channel);
4452                 if (!is_channel_valid(ch_info)) {
4453                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4454                                        scan_ch->channel);
4455                         continue;
4456                 }
4457
4458                 if (!is_active || is_channel_passive(ch_info) ||
4459                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4460                         scan_ch->type = 0;      /* passive */
4461                 else
4462                         scan_ch->type = 1;      /* active */
4463
4464                 if (scan_ch->type & 1)
4465                         scan_ch->type |= (direct_mask << 1);
4466
4467                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4468                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4469
4470                 /* Set txpower levels to defaults */
4471                 scan_ch->tpc.dsp_atten = 110;
4472                 /* scan_pwr_info->tpc.dsp_atten; */
4473
4474                 /*scan_pwr_info->tpc.tx_gain; */
4475                 if (band == IEEE80211_BAND_5GHZ)
4476                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4477                 else {
4478                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4479                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4480                          * power level:
4481                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4482                          */
4483                 }
4484
4485                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4486                                scan_ch->channel,
4487                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4488                                (scan_ch->type & 1) ?
4489                                active_dwell : passive_dwell);
4490
4491                 scan_ch++;
4492                 added++;
4493         }
4494
4495         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4496         return added;
4497 }
4498
4499 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4500                               struct ieee80211_rate *rates)
4501 {
4502         int i;
4503
4504         for (i = 0; i < IWL_RATE_COUNT; i++) {
4505                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4506                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4507                 rates[i].hw_value_short = i;
4508                 rates[i].flags = 0;
4509                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4510                         /*
4511                          * If CCK != 1M then set short preamble rate flag.
4512                          */
4513                         rates[i].flags |=
4514                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4515                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
4516                 }
4517         }
4518 }
4519
4520 /**
4521  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4522  */
4523 int iwl4965_init_geos(struct iwl_priv *priv)
4524 {
4525         struct iwl_channel_info *ch;
4526         struct ieee80211_supported_band *sband;
4527         struct ieee80211_channel *channels;
4528         struct ieee80211_channel *geo_ch;
4529         struct ieee80211_rate *rates;
4530         int i = 0;
4531
4532         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4533             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4534                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4535                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4536                 return 0;
4537         }
4538
4539         channels = kzalloc(sizeof(struct ieee80211_channel) *
4540                            priv->channel_count, GFP_KERNEL);
4541         if (!channels)
4542                 return -ENOMEM;
4543
4544         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4545                         GFP_KERNEL);
4546         if (!rates) {
4547                 kfree(channels);
4548                 return -ENOMEM;
4549         }
4550
4551         /* 5.2GHz channels start after the 2.4GHz channels */
4552         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4553         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4554         /* just OFDM */
4555         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4556         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4557
4558         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4559
4560         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4561         sband->channels = channels;
4562         /* OFDM & CCK */
4563         sband->bitrates = rates;
4564         sband->n_bitrates = IWL_RATE_COUNT;
4565
4566         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4567
4568         priv->ieee_channels = channels;
4569         priv->ieee_rates = rates;
4570
4571         iwl4965_init_hw_rates(priv, rates);
4572
4573         for (i = 0;  i < priv->channel_count; i++) {
4574                 ch = &priv->channel_info[i];
4575
4576                 /* FIXME: might be removed if scan is OK */
4577                 if (!is_channel_valid(ch))
4578                         continue;
4579
4580                 if (is_channel_a_band(ch))
4581                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4582                 else
4583                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4584
4585                 geo_ch = &sband->channels[sband->n_channels++];
4586
4587                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4588                 geo_ch->max_power = ch->max_power_avg;
4589                 geo_ch->max_antenna_gain = 0xff;
4590                 geo_ch->hw_value = ch->channel;
4591
4592                 if (is_channel_valid(ch)) {
4593                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4594                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4595
4596                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4597                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4598
4599                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4600                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4601
4602                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4603                                 priv->max_channel_txpower_limit =
4604                                     ch->max_power_avg;
4605                 } else {
4606                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4607                 }
4608
4609                 /* Save flags for reg domain usage */
4610                 geo_ch->orig_flags = geo_ch->flags;
4611
4612                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4613                                 ch->channel, geo_ch->center_freq,
4614                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4615                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4616                                 "restricted" : "valid",
4617                                  geo_ch->flags);
4618         }
4619
4620         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4621              priv->cfg->sku & IWL_SKU_A) {
4622                 printk(KERN_INFO DRV_NAME
4623                        ": Incorrectly detected BG card as ABG.  Please send "
4624                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4625                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4626                 priv->cfg->sku &= ~IWL_SKU_A;
4627         }
4628
4629         printk(KERN_INFO DRV_NAME
4630                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4631                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4632                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4633
4634         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4635                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4636                         &priv->bands[IEEE80211_BAND_2GHZ];
4637         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4638                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4639                         &priv->bands[IEEE80211_BAND_5GHZ];
4640
4641         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4642
4643         return 0;
4644 }
4645
4646 /*
4647  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
4648  */
4649 void iwl4965_free_geos(struct iwl_priv *priv)
4650 {
4651         kfree(priv->ieee_channels);
4652         kfree(priv->ieee_rates);
4653         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4654 }
4655
4656 /******************************************************************************
4657  *
4658  * uCode download functions
4659  *
4660  ******************************************************************************/
4661
4662 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4663 {
4664         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4665         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4666         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4667         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4668         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4669         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4670 }
4671
4672 /**
4673  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
4674  *     looking at all data.
4675  */
4676 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
4677                                  u32 len)
4678 {
4679         u32 val;
4680         u32 save_len = len;
4681         int rc = 0;
4682         u32 errcnt;
4683
4684         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4685
4686         rc = iwl_grab_nic_access(priv);
4687         if (rc)
4688                 return rc;
4689
4690         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
4691
4692         errcnt = 0;
4693         for (; len > 0; len -= sizeof(u32), image++) {
4694                 /* read data comes through single port, auto-incr addr */
4695                 /* NOTE: Use the debugless read so we don't flood kernel log
4696                  * if IWL_DL_IO is set */
4697                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4698                 if (val != le32_to_cpu(*image)) {
4699                         IWL_ERROR("uCode INST section is invalid at "
4700                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4701                                   save_len - len, val, le32_to_cpu(*image));
4702                         rc = -EIO;
4703                         errcnt++;
4704                         if (errcnt >= 20)
4705                                 break;
4706                 }
4707         }
4708
4709         iwl_release_nic_access(priv);
4710
4711         if (!errcnt)
4712                 IWL_DEBUG_INFO
4713                     ("ucode image in INSTRUCTION memory is good\n");
4714
4715         return rc;
4716 }
4717
4718
4719 /**
4720  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
4721  *   using sample data 100 bytes apart.  If these sample points are good,
4722  *   it's a pretty good bet that everything between them is good, too.
4723  */
4724 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4725 {
4726         u32 val;
4727         int rc = 0;
4728         u32 errcnt = 0;
4729         u32 i;
4730
4731         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4732
4733         rc = iwl_grab_nic_access(priv);
4734         if (rc)
4735                 return rc;
4736
4737         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4738                 /* read data comes through single port, auto-incr addr */
4739                 /* NOTE: Use the debugless read so we don't flood kernel log
4740                  * if IWL_DL_IO is set */
4741                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4742                         i + RTC_INST_LOWER_BOUND);
4743                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4744                 if (val != le32_to_cpu(*image)) {
4745 #if 0 /* Enable this if you want to see details */
4746                         IWL_ERROR("uCode INST section is invalid at "
4747                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4748                                   i, val, *image);
4749 #endif
4750                         rc = -EIO;
4751                         errcnt++;
4752                         if (errcnt >= 3)
4753                                 break;
4754                 }
4755         }
4756
4757         iwl_release_nic_access(priv);
4758
4759         return rc;
4760 }
4761
4762
4763 /**
4764  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
4765  *    and verify its contents
4766  */
4767 static int iwl4965_verify_ucode(struct iwl_priv *priv)
4768 {
4769         __le32 *image;
4770         u32 len;
4771         int rc = 0;
4772
4773         /* Try bootstrap */
4774         image = (__le32 *)priv->ucode_boot.v_addr;
4775         len = priv->ucode_boot.len;
4776         rc = iwl4965_verify_inst_sparse(priv, image, len);
4777         if (rc == 0) {
4778                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
4779                 return 0;
4780         }
4781
4782         /* Try initialize */
4783         image = (__le32 *)priv->ucode_init.v_addr;
4784         len = priv->ucode_init.len;
4785         rc = iwl4965_verify_inst_sparse(priv, image, len);
4786         if (rc == 0) {
4787                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
4788                 return 0;
4789         }
4790
4791         /* Try runtime/protocol */
4792         image = (__le32 *)priv->ucode_code.v_addr;
4793         len = priv->ucode_code.len;
4794         rc = iwl4965_verify_inst_sparse(priv, image, len);
4795         if (rc == 0) {
4796                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
4797                 return 0;
4798         }
4799
4800         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
4801
4802         /* Since nothing seems to match, show first several data entries in
4803          * instruction SRAM, so maybe visual inspection will give a clue.
4804          * Selection of bootstrap image (vs. other images) is arbitrary. */
4805         image = (__le32 *)priv->ucode_boot.v_addr;
4806         len = priv->ucode_boot.len;
4807         rc = iwl4965_verify_inst_full(priv, image, len);
4808
4809         return rc;
4810 }
4811
4812 static void iwl4965_nic_start(struct iwl_priv *priv)
4813 {
4814         /* Remove all resets to allow NIC to operate */
4815         iwl_write32(priv, CSR_RESET, 0);
4816 }
4817
4818
4819 /**
4820  * iwl4965_read_ucode - Read uCode images from disk file.
4821  *
4822  * Copy into buffers for card to fetch via bus-mastering
4823  */
4824 static int iwl4965_read_ucode(struct iwl_priv *priv)
4825 {
4826         struct iwl4965_ucode *ucode;
4827         int ret;
4828         const struct firmware *ucode_raw;
4829         const char *name = priv->cfg->fw_name;
4830         u8 *src;
4831         size_t len;
4832         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4833
4834         /* Ask kernel firmware_class module to get the boot firmware off disk.
4835          * request_firmware() is synchronous, file is in memory on return. */
4836         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4837         if (ret < 0) {
4838                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4839                                         name, ret);
4840                 goto error;
4841         }
4842
4843         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4844                        name, ucode_raw->size);
4845
4846         /* Make sure that we got at least our header! */
4847         if (ucode_raw->size < sizeof(*ucode)) {
4848                 IWL_ERROR("File size way too small!\n");
4849                 ret = -EINVAL;
4850                 goto err_release;
4851         }
4852
4853         /* Data from ucode file:  header followed by uCode images */
4854         ucode = (void *)ucode_raw->data;
4855
4856         ver = le32_to_cpu(ucode->ver);
4857         inst_size = le32_to_cpu(ucode->inst_size);
4858         data_size = le32_to_cpu(ucode->data_size);
4859         init_size = le32_to_cpu(ucode->init_size);
4860         init_data_size = le32_to_cpu(ucode->init_data_size);
4861         boot_size = le32_to_cpu(ucode->boot_size);
4862
4863         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4864         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4865                        inst_size);
4866         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4867                        data_size);
4868         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4869                        init_size);
4870         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4871                        init_data_size);
4872         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4873                        boot_size);
4874
4875         /* Verify size of file vs. image size info in file's header */
4876         if (ucode_raw->size < sizeof(*ucode) +
4877                 inst_size + data_size + init_size +
4878                 init_data_size + boot_size) {
4879
4880                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4881                                (int)ucode_raw->size);
4882                 ret = -EINVAL;
4883                 goto err_release;
4884         }
4885
4886         /* Verify that uCode images will fit in card's SRAM */
4887         if (inst_size > priv->hw_params.max_inst_size) {
4888                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4889                                inst_size);
4890                 ret = -EINVAL;
4891                 goto err_release;
4892         }
4893
4894         if (data_size > priv->hw_params.max_data_size) {
4895                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4896                                 data_size);
4897                 ret = -EINVAL;
4898                 goto err_release;
4899         }
4900         if (init_size > priv->hw_params.max_inst_size) {
4901                 IWL_DEBUG_INFO
4902                     ("uCode init instr len %d too large to fit in\n",
4903                       init_size);
4904                 ret = -EINVAL;
4905                 goto err_release;
4906         }
4907         if (init_data_size > priv->hw_params.max_data_size) {
4908                 IWL_DEBUG_INFO
4909                     ("uCode init data len %d too large to fit in\n",
4910                       init_data_size);
4911                 ret = -EINVAL;
4912                 goto err_release;
4913         }
4914         if (boot_size > priv->hw_params.max_bsm_size) {
4915                 IWL_DEBUG_INFO
4916                     ("uCode boot instr len %d too large to fit in\n",
4917                       boot_size);
4918                 ret = -EINVAL;
4919                 goto err_release;
4920         }
4921
4922         /* Allocate ucode buffers for card's bus-master loading ... */
4923
4924         /* Runtime instructions and 2 copies of data:
4925          * 1) unmodified from disk
4926          * 2) backup cache for save/restore during power-downs */
4927         priv->ucode_code.len = inst_size;
4928         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4929
4930         priv->ucode_data.len = data_size;
4931         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4932
4933         priv->ucode_data_backup.len = data_size;
4934         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4935
4936         /* Initialization instructions and data */
4937         if (init_size && init_data_size) {
4938                 priv->ucode_init.len = init_size;
4939                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4940
4941                 priv->ucode_init_data.len = init_data_size;
4942                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4943
4944                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4945                         goto err_pci_alloc;
4946         }
4947
4948         /* Bootstrap (instructions only, no data) */
4949         if (boot_size) {
4950                 priv->ucode_boot.len = boot_size;
4951                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4952
4953                 if (!priv->ucode_boot.v_addr)
4954                         goto err_pci_alloc;
4955         }
4956
4957         /* Copy images into buffers for card's bus-master reads ... */
4958
4959         /* Runtime instructions (first block of data in file) */
4960         src = &ucode->data[0];
4961         len = priv->ucode_code.len;
4962         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4963         memcpy(priv->ucode_code.v_addr, src, len);
4964         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4965                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4966
4967         /* Runtime data (2nd block)
4968          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
4969         src = &ucode->data[inst_size];
4970         len = priv->ucode_data.len;
4971         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4972         memcpy(priv->ucode_data.v_addr, src, len);
4973         memcpy(priv->ucode_data_backup.v_addr, src, len);
4974
4975         /* Initialization instructions (3rd block) */
4976         if (init_size) {
4977                 src = &ucode->data[inst_size + data_size];
4978                 len = priv->ucode_init.len;
4979                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4980                                 len);
4981                 memcpy(priv->ucode_init.v_addr, src, len);
4982         }
4983
4984         /* Initialization data (4th block) */
4985         if (init_data_size) {
4986                 src = &ucode->data[inst_size + data_size + init_size];
4987                 len = priv->ucode_init_data.len;
4988                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4989                                len);
4990                 memcpy(priv->ucode_init_data.v_addr, src, len);
4991         }
4992
4993         /* Bootstrap instructions (5th block) */
4994         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4995         len = priv->ucode_boot.len;
4996         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4997         memcpy(priv->ucode_boot.v_addr, src, len);
4998
4999         /* We have our copies now, allow OS release its copies */
5000         release_firmware(ucode_raw);
5001         return 0;
5002
5003  err_pci_alloc:
5004         IWL_ERROR("failed to allocate pci memory\n");
5005         ret = -ENOMEM;
5006         iwl4965_dealloc_ucode_pci(priv);
5007
5008  err_release:
5009         release_firmware(ucode_raw);
5010
5011  error:
5012         return ret;
5013 }
5014
5015
5016 /**
5017  * iwl4965_set_ucode_ptrs - Set uCode address location
5018  *
5019  * Tell initialization uCode where to find runtime uCode.
5020  *
5021  * BSM registers initially contain pointers to initialization uCode.
5022  * We need to replace them to load runtime uCode inst and data,
5023  * and to save runtime data when powering down.
5024  */
5025 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5026 {
5027         dma_addr_t pinst;
5028         dma_addr_t pdata;
5029         int rc = 0;
5030         unsigned long flags;
5031
5032         /* bits 35:4 for 4965 */
5033         pinst = priv->ucode_code.p_addr >> 4;
5034         pdata = priv->ucode_data_backup.p_addr >> 4;
5035
5036         spin_lock_irqsave(&priv->lock, flags);
5037         rc = iwl_grab_nic_access(priv);
5038         if (rc) {
5039                 spin_unlock_irqrestore(&priv->lock, flags);
5040                 return rc;
5041         }
5042
5043         /* Tell bootstrap uCode where to find image to load */
5044         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5045         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5046         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5047                                  priv->ucode_data.len);
5048
5049         /* Inst bytecount must be last to set up, bit 31 signals uCode
5050          *   that all new ptr/size info is in place */
5051         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5052                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5053
5054         iwl_release_nic_access(priv);
5055
5056         spin_unlock_irqrestore(&priv->lock, flags);
5057
5058         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5059
5060         return rc;
5061 }
5062
5063 /**
5064  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5065  *
5066  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5067  *
5068  * The 4965 "initialize" ALIVE reply contains calibration data for:
5069  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
5070  *   (3945 does not contain this data).
5071  *
5072  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5073 */
5074 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5075 {
5076         /* Check alive response for "valid" sign from uCode */
5077         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5078                 /* We had an error bringing up the hardware, so take it
5079                  * all the way back down so we can try again */
5080                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5081                 goto restart;
5082         }
5083
5084         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5085          * This is a paranoid check, because we would not have gotten the
5086          * "initialize" alive if code weren't properly loaded.  */
5087         if (iwl4965_verify_ucode(priv)) {
5088                 /* Runtime instruction load was bad;
5089                  * take it all the way back down so we can try again */
5090                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5091                 goto restart;
5092         }
5093
5094         /* Calculate temperature */
5095         priv->temperature = iwl4965_get_temperature(priv);
5096
5097         /* Send pointers to protocol/runtime uCode image ... init code will
5098          * load and launch runtime uCode, which will send us another "Alive"
5099          * notification. */
5100         IWL_DEBUG_INFO("Initialization Alive received.\n");
5101         if (iwl4965_set_ucode_ptrs(priv)) {
5102                 /* Runtime instruction load won't happen;
5103                  * take it all the way back down so we can try again */
5104                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5105                 goto restart;
5106         }
5107         return;
5108
5109  restart:
5110         queue_work(priv->workqueue, &priv->restart);
5111 }
5112
5113
5114 /**
5115  * iwl4965_alive_start - called after REPLY_ALIVE notification received
5116  *                   from protocol/runtime uCode (initialization uCode's
5117  *                   Alive gets handled by iwl4965_init_alive_start()).
5118  */
5119 static void iwl4965_alive_start(struct iwl_priv *priv)
5120 {
5121         int ret = 0;
5122
5123         IWL_DEBUG_INFO("Runtime Alive received.\n");
5124
5125         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5126                 /* We had an error bringing up the hardware, so take it
5127                  * all the way back down so we can try again */
5128                 IWL_DEBUG_INFO("Alive failed.\n");
5129                 goto restart;
5130         }
5131
5132         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5133          * This is a paranoid check, because we would not have gotten the
5134          * "runtime" alive if code weren't properly loaded.  */
5135         if (iwl4965_verify_ucode(priv)) {
5136                 /* Runtime instruction load was bad;
5137                  * take it all the way back down so we can try again */
5138                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5139                 goto restart;
5140         }
5141
5142         iwlcore_clear_stations_table(priv);
5143
5144         ret = priv->cfg->ops->lib->alive_notify(priv);
5145         if (ret) {
5146                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5147                             ret);
5148                 goto restart;
5149         }
5150
5151         /* After the ALIVE response, we can send host commands to 4965 uCode */
5152         set_bit(STATUS_ALIVE, &priv->status);
5153
5154         /* Clear out the uCode error bit if it is set */
5155         clear_bit(STATUS_FW_ERROR, &priv->status);
5156
5157         if (iwl_is_rfkill(priv))
5158                 return;
5159
5160         ieee80211_start_queues(priv->hw);
5161
5162         priv->active_rate = priv->rates_mask;
5163         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5164
5165         if (iwl_is_associated(priv)) {
5166                 struct iwl4965_rxon_cmd *active_rxon =
5167                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5168
5169                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5170                        sizeof(priv->staging_rxon));
5171                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5172         } else {
5173                 /* Initialize our rx_config data */
5174                 iwl4965_connection_init_rx_config(priv);
5175                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5176         }
5177
5178         /* Configure Bluetooth device coexistence support */
5179         iwl4965_send_bt_config(priv);
5180
5181         /* Configure the adapter for unassociated operation */
5182         iwl4965_commit_rxon(priv);
5183
5184         /* At this point, the NIC is initialized and operational */
5185         priv->notif_missed_beacons = 0;
5186
5187         iwl4965_rf_kill_ct_config(priv);
5188
5189         iwl_leds_register(priv);
5190
5191         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5192         set_bit(STATUS_READY, &priv->status);
5193         wake_up_interruptible(&priv->wait_command_queue);
5194
5195         if (priv->error_recovering)
5196                 iwl4965_error_recovery(priv);
5197
5198         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5199         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5200         return;
5201
5202  restart:
5203         queue_work(priv->workqueue, &priv->restart);
5204 }
5205
5206 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5207
5208 static void __iwl4965_down(struct iwl_priv *priv)
5209 {
5210         unsigned long flags;
5211         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5212         struct ieee80211_conf *conf = NULL;
5213
5214         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5215
5216         conf = ieee80211_get_hw_conf(priv->hw);
5217
5218         if (!exit_pending)
5219                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5220
5221         iwl_leds_unregister(priv);
5222
5223         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5224
5225         iwlcore_clear_stations_table(priv);
5226
5227         /* Unblock any waiting calls */
5228         wake_up_interruptible_all(&priv->wait_command_queue);
5229
5230         /* Wipe out the EXIT_PENDING status bit if we are not actually
5231          * exiting the module */
5232         if (!exit_pending)
5233                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5234
5235         /* stop and reset the on-board processor */
5236         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5237
5238         /* tell the device to stop sending interrupts */
5239         spin_lock_irqsave(&priv->lock, flags);
5240         iwl4965_disable_interrupts(priv);
5241         spin_unlock_irqrestore(&priv->lock, flags);
5242         iwl_synchronize_irq(priv);
5243
5244         if (priv->mac80211_registered)
5245                 ieee80211_stop_queues(priv->hw);
5246
5247         /* If we have not previously called iwl4965_init() then
5248          * clear all bits but the RF Kill and SUSPEND bits and return */
5249         if (!iwl_is_init(priv)) {
5250                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5251                                         STATUS_RF_KILL_HW |
5252                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5253                                         STATUS_RF_KILL_SW |
5254                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5255                                         STATUS_GEO_CONFIGURED |
5256                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5257                                         STATUS_IN_SUSPEND;
5258                 goto exit;
5259         }
5260
5261         /* ...otherwise clear out all the status bits but the RF Kill and
5262          * SUSPEND bits and continue taking the NIC down. */
5263         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5264                                 STATUS_RF_KILL_HW |
5265                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5266                                 STATUS_RF_KILL_SW |
5267                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5268                                 STATUS_GEO_CONFIGURED |
5269                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5270                                 STATUS_IN_SUSPEND |
5271                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5272                                 STATUS_FW_ERROR;
5273
5274         spin_lock_irqsave(&priv->lock, flags);
5275         iwl_clear_bit(priv, CSR_GP_CNTRL,
5276                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5277         spin_unlock_irqrestore(&priv->lock, flags);
5278
5279         iwl4965_hw_txq_ctx_stop(priv);
5280         iwl4965_hw_rxq_stop(priv);
5281
5282         spin_lock_irqsave(&priv->lock, flags);
5283         if (!iwl_grab_nic_access(priv)) {
5284                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5285                                          APMG_CLK_VAL_DMA_CLK_RQT);
5286                 iwl_release_nic_access(priv);
5287         }
5288         spin_unlock_irqrestore(&priv->lock, flags);
5289
5290         udelay(5);
5291
5292         iwl4965_hw_nic_stop_master(priv);
5293         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5294         iwl4965_hw_nic_reset(priv);
5295         priv->cfg->ops->lib->free_shared_mem(priv);
5296
5297  exit:
5298         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5299
5300         if (priv->ibss_beacon)
5301                 dev_kfree_skb(priv->ibss_beacon);
5302         priv->ibss_beacon = NULL;
5303
5304         /* clear out any free frames */
5305         iwl4965_clear_free_frames(priv);
5306 }
5307
5308 static void iwl4965_down(struct iwl_priv *priv)
5309 {
5310         mutex_lock(&priv->mutex);
5311         __iwl4965_down(priv);
5312         mutex_unlock(&priv->mutex);
5313
5314         iwl4965_cancel_deferred_work(priv);
5315 }
5316
5317 #define MAX_HW_RESTARTS 5
5318
5319 static int __iwl4965_up(struct iwl_priv *priv)
5320 {
5321         int i;
5322         int ret;
5323
5324         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5325                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5326                 return -EIO;
5327         }
5328
5329         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5330                 IWL_WARNING("Radio disabled by SW RF kill (module "
5331                             "parameter)\n");
5332                 iwl_rfkill_set_hw_state(priv);
5333                 return -ENODEV;
5334         }
5335
5336         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5337                 IWL_ERROR("ucode not available for device bringup\n");
5338                 return -EIO;
5339         }
5340
5341         /* If platform's RF_KILL switch is NOT set to KILL */
5342         if (iwl_read32(priv, CSR_GP_CNTRL) &
5343                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5344                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5345         else {
5346                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5347                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5348                         iwl_rfkill_set_hw_state(priv);
5349                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5350                         return -ENODEV;
5351                 }
5352         }
5353
5354         iwl_rfkill_set_hw_state(priv);
5355         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5356
5357         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
5358         if (ret) {
5359                 IWL_ERROR("Unable to allocate shared memory\n");
5360                 return ret;
5361         }
5362
5363         ret = priv->cfg->ops->lib->hw_nic_init(priv);
5364         if (ret) {
5365                 IWL_ERROR("Unable to init nic\n");
5366                 return ret;
5367         }
5368
5369         /* make sure rfkill handshake bits are cleared */
5370         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5371         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5372                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5373
5374         /* clear (again), then enable host interrupts */
5375         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5376         iwl4965_enable_interrupts(priv);
5377
5378         /* really make sure rfkill handshake bits are cleared */
5379         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5380         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5381
5382         /* Copy original ucode data image from disk into backup cache.
5383          * This will be used to initialize the on-board processor's
5384          * data SRAM for a clean start when the runtime program first loads. */
5385         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5386                priv->ucode_data.len);
5387
5388         /* We return success when we resume from suspend and rf_kill is on. */
5389         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5390                 return 0;
5391
5392         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5393
5394                 iwlcore_clear_stations_table(priv);
5395
5396                 /* load bootstrap state machine,
5397                  * load bootstrap program into processor's memory,
5398                  * prepare to load the "initialize" uCode */
5399                 ret = priv->cfg->ops->lib->load_ucode(priv);
5400
5401                 if (ret) {
5402                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5403                         continue;
5404                 }
5405
5406                 /* start card; "initialize" will load runtime ucode */
5407                 iwl4965_nic_start(priv);
5408
5409                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5410
5411                 return 0;
5412         }
5413
5414         set_bit(STATUS_EXIT_PENDING, &priv->status);
5415         __iwl4965_down(priv);
5416
5417         /* tried to restart and config the device for as long as our
5418          * patience could withstand */
5419         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5420         return -EIO;
5421 }
5422
5423
5424 /*****************************************************************************
5425  *
5426  * Workqueue callbacks
5427  *
5428  *****************************************************************************/
5429
5430 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5431 {
5432         struct iwl_priv *priv =
5433             container_of(data, struct iwl_priv, init_alive_start.work);
5434
5435         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5436                 return;
5437
5438         mutex_lock(&priv->mutex);
5439         iwl4965_init_alive_start(priv);
5440         mutex_unlock(&priv->mutex);
5441 }
5442
5443 static void iwl4965_bg_alive_start(struct work_struct *data)
5444 {
5445         struct iwl_priv *priv =
5446             container_of(data, struct iwl_priv, alive_start.work);
5447
5448         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5449                 return;
5450
5451         mutex_lock(&priv->mutex);
5452         iwl4965_alive_start(priv);
5453         mutex_unlock(&priv->mutex);
5454 }
5455
5456 static void iwl4965_bg_rf_kill(struct work_struct *work)
5457 {
5458         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5459
5460         wake_up_interruptible(&priv->wait_command_queue);
5461
5462         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5463                 return;
5464
5465         mutex_lock(&priv->mutex);
5466
5467         if (!iwl_is_rfkill(priv)) {
5468                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5469                           "HW and/or SW RF Kill no longer active, restarting "
5470                           "device\n");
5471                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5472                         queue_work(priv->workqueue, &priv->restart);
5473         } else {
5474                 /* make sure mac80211 stop sending Tx frame */
5475                 if (priv->mac80211_registered)
5476                         ieee80211_stop_queues(priv->hw);
5477
5478                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5479                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5480                                           "disabled by SW switch\n");
5481                 else
5482                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5483                                     "Kill switch must be turned off for "
5484                                     "wireless networking to work.\n");
5485         }
5486         iwl_rfkill_set_hw_state(priv);
5487
5488         mutex_unlock(&priv->mutex);
5489 }
5490
5491 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5492
5493 static void iwl4965_bg_scan_check(struct work_struct *data)
5494 {
5495         struct iwl_priv *priv =
5496             container_of(data, struct iwl_priv, scan_check.work);
5497
5498         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5499                 return;
5500
5501         mutex_lock(&priv->mutex);
5502         if (test_bit(STATUS_SCANNING, &priv->status) ||
5503             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5504                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5505                           "Scan completion watchdog resetting adapter (%dms)\n",
5506                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5507
5508                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5509                         iwl4965_send_scan_abort(priv);
5510         }
5511         mutex_unlock(&priv->mutex);
5512 }
5513
5514 static void iwl4965_bg_request_scan(struct work_struct *data)
5515 {
5516         struct iwl_priv *priv =
5517             container_of(data, struct iwl_priv, request_scan);
5518         struct iwl_host_cmd cmd = {
5519                 .id = REPLY_SCAN_CMD,
5520                 .len = sizeof(struct iwl4965_scan_cmd),
5521                 .meta.flags = CMD_SIZE_HUGE,
5522         };
5523         struct iwl4965_scan_cmd *scan;
5524         struct ieee80211_conf *conf = NULL;
5525         u16 cmd_len;
5526         enum ieee80211_band band;
5527         u8 direct_mask;
5528         int ret = 0;
5529
5530         conf = ieee80211_get_hw_conf(priv->hw);
5531
5532         mutex_lock(&priv->mutex);
5533
5534         if (!iwl_is_ready(priv)) {
5535                 IWL_WARNING("request scan called when driver not ready.\n");
5536                 goto done;
5537         }
5538
5539         /* Make sure the scan wasn't cancelled before this queued work
5540          * was given the chance to run... */
5541         if (!test_bit(STATUS_SCANNING, &priv->status))
5542                 goto done;
5543
5544         /* This should never be called or scheduled if there is currently
5545          * a scan active in the hardware. */
5546         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5547                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5548                                "Ignoring second request.\n");
5549                 ret = -EIO;
5550                 goto done;
5551         }
5552
5553         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5554                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5555                 goto done;
5556         }
5557
5558         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5559                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5560                 goto done;
5561         }
5562
5563         if (iwl_is_rfkill(priv)) {
5564                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5565                 goto done;
5566         }
5567
5568         if (!test_bit(STATUS_READY, &priv->status)) {
5569                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5570                 goto done;
5571         }
5572
5573         if (!priv->scan_bands) {
5574                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5575                 goto done;
5576         }
5577
5578         if (!priv->scan) {
5579                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5580                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5581                 if (!priv->scan) {
5582                         ret = -ENOMEM;
5583                         goto done;
5584                 }
5585         }
5586         scan = priv->scan;
5587         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5588
5589         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5590         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5591
5592         if (iwl_is_associated(priv)) {
5593                 u16 interval = 0;
5594                 u32 extra;
5595                 u32 suspend_time = 100;
5596                 u32 scan_suspend_time = 100;
5597                 unsigned long flags;
5598
5599                 IWL_DEBUG_INFO("Scanning while associated...\n");
5600
5601                 spin_lock_irqsave(&priv->lock, flags);
5602                 interval = priv->beacon_int;
5603                 spin_unlock_irqrestore(&priv->lock, flags);
5604
5605                 scan->suspend_time = 0;
5606                 scan->max_out_time = cpu_to_le32(200 * 1024);
5607                 if (!interval)
5608                         interval = suspend_time;
5609
5610                 extra = (suspend_time / interval) << 22;
5611                 scan_suspend_time = (extra |
5612                     ((suspend_time % interval) * 1024));
5613                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5614                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5615                                scan_suspend_time, interval);
5616         }
5617
5618         /* We should add the ability for user to lock to PASSIVE ONLY */
5619         if (priv->one_direct_scan) {
5620                 IWL_DEBUG_SCAN
5621                     ("Kicking off one direct scan for '%s'\n",
5622                      iwl4965_escape_essid(priv->direct_ssid,
5623                                       priv->direct_ssid_len));
5624                 scan->direct_scan[0].id = WLAN_EID_SSID;
5625                 scan->direct_scan[0].len = priv->direct_ssid_len;
5626                 memcpy(scan->direct_scan[0].ssid,
5627                        priv->direct_ssid, priv->direct_ssid_len);
5628                 direct_mask = 1;
5629         } else if (!iwl_is_associated(priv) && priv->essid_len) {
5630                 IWL_DEBUG_SCAN
5631                   ("Kicking off one direct scan for '%s' when not associated\n",
5632                    iwl4965_escape_essid(priv->essid, priv->essid_len));
5633                 scan->direct_scan[0].id = WLAN_EID_SSID;
5634                 scan->direct_scan[0].len = priv->essid_len;
5635                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5636                 direct_mask = 1;
5637         } else {
5638                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5639                 direct_mask = 0;
5640         }
5641
5642         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5643         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5644         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5645
5646
5647         switch (priv->scan_bands) {
5648         case 2:
5649                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5650                 scan->tx_cmd.rate_n_flags =
5651                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5652                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5653
5654                 scan->good_CRC_th = 0;
5655                 band = IEEE80211_BAND_2GHZ;
5656                 break;
5657
5658         case 1:
5659                 scan->tx_cmd.rate_n_flags =
5660                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5661                                 RATE_MCS_ANT_B_MSK);
5662                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5663                 band = IEEE80211_BAND_5GHZ;
5664                 break;
5665
5666         default:
5667                 IWL_WARNING("Invalid scan band count\n");
5668                 goto done;
5669         }
5670
5671         /* We don't build a direct scan probe request; the uCode will do
5672          * that based on the direct_mask added to each channel entry */
5673         cmd_len = iwl4965_fill_probe_req(priv, band,
5674                                         (struct ieee80211_mgmt *)scan->data,
5675                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5676
5677         scan->tx_cmd.len = cpu_to_le16(cmd_len);
5678         /* select Rx chains */
5679
5680         /* Force use of chains B and C (0x6) for scan Rx.
5681          * Avoid A (0x1) because of its off-channel reception on A-band.
5682          * MIMO is not used here, but value is required to make uCode happy. */
5683         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5684                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5685                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5686                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5687
5688         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5689                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5690
5691         if (direct_mask)
5692                 scan->channel_count =
5693                         iwl4965_get_channels_for_scan(
5694                                 priv, band, 1, /* active */
5695                                 direct_mask,
5696                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5697         else
5698                 scan->channel_count =
5699                         iwl4965_get_channels_for_scan(
5700                                 priv, band, 0, /* passive */
5701                                 direct_mask,
5702                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5703
5704         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5705                                RXON_FILTER_BCON_AWARE_MSK);
5706         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5707             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5708         cmd.data = scan;
5709         scan->len = cpu_to_le16(cmd.len);
5710
5711         set_bit(STATUS_SCAN_HW, &priv->status);
5712         ret = iwl_send_cmd_sync(priv, &cmd);
5713         if (ret)
5714                 goto done;
5715
5716         queue_delayed_work(priv->workqueue, &priv->scan_check,
5717                            IWL_SCAN_CHECK_WATCHDOG);
5718
5719         mutex_unlock(&priv->mutex);
5720         return;
5721
5722  done:
5723         /* inform mac80211 scan aborted */
5724         queue_work(priv->workqueue, &priv->scan_completed);
5725         mutex_unlock(&priv->mutex);
5726 }
5727
5728 static void iwl4965_bg_up(struct work_struct *data)
5729 {
5730         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5731
5732         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5733                 return;
5734
5735         mutex_lock(&priv->mutex);
5736         __iwl4965_up(priv);
5737         mutex_unlock(&priv->mutex);
5738 }
5739
5740 static void iwl4965_bg_restart(struct work_struct *data)
5741 {
5742         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5743
5744         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5745                 return;
5746
5747         iwl4965_down(priv);
5748         queue_work(priv->workqueue, &priv->up);
5749 }
5750
5751 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5752 {
5753         struct iwl_priv *priv =
5754             container_of(data, struct iwl_priv, rx_replenish);
5755
5756         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5757                 return;
5758
5759         mutex_lock(&priv->mutex);
5760         iwl4965_rx_replenish(priv);
5761         mutex_unlock(&priv->mutex);
5762 }
5763
5764 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5765
5766 static void iwl4965_post_associate(struct iwl_priv *priv)
5767 {
5768         struct ieee80211_conf *conf = NULL;
5769         int ret = 0;
5770         DECLARE_MAC_BUF(mac);
5771
5772         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5773                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5774                 return;
5775         }
5776
5777         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5778                         priv->assoc_id,
5779                         print_mac(mac, priv->active_rxon.bssid_addr));
5780
5781
5782         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5783                 return;
5784
5785
5786         if (!priv->vif || !priv->is_open)
5787                 return;
5788
5789         iwl4965_scan_cancel_timeout(priv, 200);
5790
5791         conf = ieee80211_get_hw_conf(priv->hw);
5792
5793         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5794         iwl4965_commit_rxon(priv);
5795
5796         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5797         iwl4965_setup_rxon_timing(priv);
5798         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5799                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5800         if (ret)
5801                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5802                             "Attempting to continue.\n");
5803
5804         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5805
5806 #ifdef CONFIG_IWL4965_HT
5807         if (priv->current_ht_config.is_ht)
5808                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5809 #endif /* CONFIG_IWL4965_HT*/
5810         iwl4965_set_rxon_chain(priv);
5811         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5812
5813         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5814                         priv->assoc_id, priv->beacon_int);
5815
5816         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5817                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5818         else
5819                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5820
5821         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5822                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5823                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5824                 else
5825                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5826
5827                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5828                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5829
5830         }
5831
5832         iwl4965_commit_rxon(priv);
5833
5834         switch (priv->iw_mode) {
5835         case IEEE80211_IF_TYPE_STA:
5836                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5837                 break;
5838
5839         case IEEE80211_IF_TYPE_IBSS:
5840
5841                 /* clear out the station table */
5842                 iwlcore_clear_stations_table(priv);
5843
5844                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5845                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5846                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5847                 iwl4965_send_beacon_cmd(priv);
5848
5849                 break;
5850
5851         default:
5852                 IWL_ERROR("%s Should not be called in %d mode\n",
5853                                 __FUNCTION__, priv->iw_mode);
5854                 break;
5855         }
5856
5857         iwl4965_sequence_reset(priv);
5858
5859         /* Enable Rx differential gain and sensitivity calibrations */
5860         iwl_chain_noise_reset(priv);
5861         priv->start_calib = 1;
5862
5863         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5864                 priv->assoc_station_added = 1;
5865
5866         iwl4965_activate_qos(priv, 0);
5867
5868         iwl_power_update_mode(priv, 0);
5869         /* we have just associated, don't start scan too early */
5870         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5871 }
5872
5873
5874 static void iwl4965_bg_post_associate(struct work_struct *data)
5875 {
5876         struct iwl_priv *priv = container_of(data, struct iwl_priv,
5877                                              post_associate.work);
5878
5879         mutex_lock(&priv->mutex);
5880         iwl4965_post_associate(priv);
5881         mutex_unlock(&priv->mutex);
5882
5883 }
5884
5885 static void iwl4965_bg_abort_scan(struct work_struct *work)
5886 {
5887         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5888
5889         if (!iwl_is_ready(priv))
5890                 return;
5891
5892         mutex_lock(&priv->mutex);
5893
5894         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5895         iwl4965_send_scan_abort(priv);
5896
5897         mutex_unlock(&priv->mutex);
5898 }
5899
5900 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5901
5902 static void iwl4965_bg_scan_completed(struct work_struct *work)
5903 {
5904         struct iwl_priv *priv =
5905             container_of(work, struct iwl_priv, scan_completed);
5906
5907         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5908
5909         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5910                 return;
5911
5912         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5913                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5914
5915         ieee80211_scan_completed(priv->hw);
5916
5917         /* Since setting the TXPOWER may have been deferred while
5918          * performing the scan, fire one off */
5919         mutex_lock(&priv->mutex);
5920         iwl4965_hw_reg_send_txpower(priv);
5921         mutex_unlock(&priv->mutex);
5922 }
5923
5924 /*****************************************************************************
5925  *
5926  * mac80211 entry point functions
5927  *
5928  *****************************************************************************/
5929
5930 #define UCODE_READY_TIMEOUT     (2 * HZ)
5931
5932 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5933 {
5934         struct iwl_priv *priv = hw->priv;
5935         int ret;
5936
5937         IWL_DEBUG_MAC80211("enter\n");
5938
5939         if (pci_enable_device(priv->pci_dev)) {
5940                 IWL_ERROR("Fail to pci_enable_device\n");
5941                 return -ENODEV;
5942         }
5943         pci_restore_state(priv->pci_dev);
5944         pci_enable_msi(priv->pci_dev);
5945
5946         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5947                           DRV_NAME, priv);
5948         if (ret) {
5949                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5950                 goto out_disable_msi;
5951         }
5952
5953         /* we should be verifying the device is ready to be opened */
5954         mutex_lock(&priv->mutex);
5955
5956         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5957         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5958          * ucode filename and max sizes are card-specific. */
5959
5960         if (!priv->ucode_code.len) {
5961                 ret = iwl4965_read_ucode(priv);
5962                 if (ret) {
5963                         IWL_ERROR("Could not read microcode: %d\n", ret);
5964                         mutex_unlock(&priv->mutex);
5965                         goto out_release_irq;
5966                 }
5967         }
5968
5969         ret = __iwl4965_up(priv);
5970
5971         mutex_unlock(&priv->mutex);
5972
5973         if (ret)
5974                 goto out_release_irq;
5975
5976         IWL_DEBUG_INFO("Start UP work done.\n");
5977
5978         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5979                 return 0;
5980
5981         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5982          * mac80211 will not be run successfully. */
5983         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5984                         test_bit(STATUS_READY, &priv->status),
5985                         UCODE_READY_TIMEOUT);
5986         if (!ret) {
5987                 if (!test_bit(STATUS_READY, &priv->status)) {
5988                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5989                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
5990                         ret = -ETIMEDOUT;
5991                         goto out_release_irq;
5992                 }
5993         }
5994
5995         priv->is_open = 1;
5996         IWL_DEBUG_MAC80211("leave\n");
5997         return 0;
5998
5999 out_release_irq:
6000         free_irq(priv->pci_dev->irq, priv);
6001 out_disable_msi:
6002         pci_disable_msi(priv->pci_dev);
6003         pci_disable_device(priv->pci_dev);
6004         priv->is_open = 0;
6005         IWL_DEBUG_MAC80211("leave - failed\n");
6006         return ret;
6007 }
6008
6009 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6010 {
6011         struct iwl_priv *priv = hw->priv;
6012
6013         IWL_DEBUG_MAC80211("enter\n");
6014
6015         if (!priv->is_open) {
6016                 IWL_DEBUG_MAC80211("leave - skip\n");
6017                 return;
6018         }
6019
6020         priv->is_open = 0;
6021
6022         if (iwl_is_ready_rf(priv)) {
6023                 /* stop mac, cancel any scan request and clear
6024                  * RXON_FILTER_ASSOC_MSK BIT
6025                  */
6026                 mutex_lock(&priv->mutex);
6027                 iwl4965_scan_cancel_timeout(priv, 100);
6028                 cancel_delayed_work(&priv->post_associate);
6029                 mutex_unlock(&priv->mutex);
6030         }
6031
6032         iwl4965_down(priv);
6033
6034         flush_workqueue(priv->workqueue);
6035         free_irq(priv->pci_dev->irq, priv);
6036         pci_disable_msi(priv->pci_dev);
6037         pci_save_state(priv->pci_dev);
6038         pci_disable_device(priv->pci_dev);
6039
6040         IWL_DEBUG_MAC80211("leave\n");
6041 }
6042
6043 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6044                       struct ieee80211_tx_control *ctl)
6045 {
6046         struct iwl_priv *priv = hw->priv;
6047
6048         IWL_DEBUG_MAC80211("enter\n");
6049
6050         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6051                 IWL_DEBUG_MAC80211("leave - monitor\n");
6052                 return -1;
6053         }
6054
6055         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6056                      ctl->tx_rate->bitrate);
6057
6058         if (iwl4965_tx_skb(priv, skb, ctl))
6059                 dev_kfree_skb_any(skb);
6060
6061         IWL_DEBUG_MAC80211("leave\n");
6062         return 0;
6063 }
6064
6065 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6066                                  struct ieee80211_if_init_conf *conf)
6067 {
6068         struct iwl_priv *priv = hw->priv;
6069         unsigned long flags;
6070         DECLARE_MAC_BUF(mac);
6071
6072         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6073
6074         if (priv->vif) {
6075                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6076                 return -EOPNOTSUPP;
6077         }
6078
6079         spin_lock_irqsave(&priv->lock, flags);
6080         priv->vif = conf->vif;
6081
6082         spin_unlock_irqrestore(&priv->lock, flags);
6083
6084         mutex_lock(&priv->mutex);
6085
6086         if (conf->mac_addr) {
6087                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6088                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6089         }
6090
6091         if (iwl_is_ready(priv))
6092                 iwl4965_set_mode(priv, conf->type);
6093
6094         mutex_unlock(&priv->mutex);
6095
6096         IWL_DEBUG_MAC80211("leave\n");
6097         return 0;
6098 }
6099
6100 /**
6101  * iwl4965_mac_config - mac80211 config callback
6102  *
6103  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6104  * be set inappropriately and the driver currently sets the hardware up to
6105  * use it whenever needed.
6106  */
6107 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6108 {
6109         struct iwl_priv *priv = hw->priv;
6110         const struct iwl_channel_info *ch_info;
6111         unsigned long flags;
6112         int ret = 0;
6113
6114         mutex_lock(&priv->mutex);
6115         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6116
6117         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6118
6119         if (!iwl_is_ready(priv)) {
6120                 IWL_DEBUG_MAC80211("leave - not ready\n");
6121                 ret = -EIO;
6122                 goto out;
6123         }
6124
6125         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6126                      test_bit(STATUS_SCANNING, &priv->status))) {
6127                 IWL_DEBUG_MAC80211("leave - scanning\n");
6128                 set_bit(STATUS_CONF_PENDING, &priv->status);
6129                 mutex_unlock(&priv->mutex);
6130                 return 0;
6131         }
6132
6133         spin_lock_irqsave(&priv->lock, flags);
6134
6135         ch_info = iwl_get_channel_info(priv, conf->channel->band,
6136                         ieee80211_frequency_to_channel(conf->channel->center_freq));
6137         if (!is_channel_valid(ch_info)) {
6138                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6139                 spin_unlock_irqrestore(&priv->lock, flags);
6140                 ret = -EINVAL;
6141                 goto out;
6142         }
6143
6144 #ifdef CONFIG_IWL4965_HT
6145         /* if we are switching from ht to 2.4 clear flags
6146          * from any ht related info since 2.4 does not
6147          * support ht */
6148         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6149 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6150             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6151 #endif
6152         )
6153                 priv->staging_rxon.flags = 0;
6154 #endif /* CONFIG_IWL4965_HT */
6155
6156         iwlcore_set_rxon_channel(priv, conf->channel->band,
6157                 ieee80211_frequency_to_channel(conf->channel->center_freq));
6158
6159         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6160
6161         /* The list of supported rates and rate mask can be different
6162          * for each band; since the band may have changed, reset
6163          * the rate mask to what mac80211 lists */
6164         iwl4965_set_rate(priv);
6165
6166         spin_unlock_irqrestore(&priv->lock, flags);
6167
6168 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6169         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6170                 iwl4965_hw_channel_switch(priv, conf->channel);
6171                 goto out;
6172         }
6173 #endif
6174
6175         if (priv->cfg->ops->lib->radio_kill_sw)
6176                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6177
6178         if (!conf->radio_enabled) {
6179                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6180                 goto out;
6181         }
6182
6183         if (iwl_is_rfkill(priv)) {
6184                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6185                 ret = -EIO;
6186                 goto out;
6187         }
6188
6189         iwl4965_set_rate(priv);
6190
6191         if (memcmp(&priv->active_rxon,
6192                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6193                 iwl4965_commit_rxon(priv);
6194         else
6195                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6196
6197         IWL_DEBUG_MAC80211("leave\n");
6198
6199 out:
6200         clear_bit(STATUS_CONF_PENDING, &priv->status);
6201         mutex_unlock(&priv->mutex);
6202         return ret;
6203 }
6204
6205 static void iwl4965_config_ap(struct iwl_priv *priv)
6206 {
6207         int ret = 0;
6208
6209         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6210                 return;
6211
6212         /* The following should be done only at AP bring up */
6213         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6214
6215                 /* RXON - unassoc (to set timing command) */
6216                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6217                 iwl4965_commit_rxon(priv);
6218
6219                 /* RXON Timing */
6220                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6221                 iwl4965_setup_rxon_timing(priv);
6222                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6223                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6224                 if (ret)
6225                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6226                                         "Attempting to continue.\n");
6227
6228                 iwl4965_set_rxon_chain(priv);
6229
6230                 /* FIXME: what should be the assoc_id for AP? */
6231                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6232                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6233                         priv->staging_rxon.flags |=
6234                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6235                 else
6236                         priv->staging_rxon.flags &=
6237                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6238
6239                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6240                         if (priv->assoc_capability &
6241                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6242                                 priv->staging_rxon.flags |=
6243                                         RXON_FLG_SHORT_SLOT_MSK;
6244                         else
6245                                 priv->staging_rxon.flags &=
6246                                         ~RXON_FLG_SHORT_SLOT_MSK;
6247
6248                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6249                                 priv->staging_rxon.flags &=
6250                                         ~RXON_FLG_SHORT_SLOT_MSK;
6251                 }
6252                 /* restore RXON assoc */
6253                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6254                 iwl4965_commit_rxon(priv);
6255                 iwl4965_activate_qos(priv, 1);
6256                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6257         }
6258         iwl4965_send_beacon_cmd(priv);
6259
6260         /* FIXME - we need to add code here to detect a totally new
6261          * configuration, reset the AP, unassoc, rxon timing, assoc,
6262          * clear sta table, add BCAST sta... */
6263 }
6264
6265 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6266                                         struct ieee80211_vif *vif,
6267                                     struct ieee80211_if_conf *conf)
6268 {
6269         struct iwl_priv *priv = hw->priv;
6270         DECLARE_MAC_BUF(mac);
6271         unsigned long flags;
6272         int rc;
6273
6274         if (conf == NULL)
6275                 return -EIO;
6276
6277         if (priv->vif != vif) {
6278                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6279                 return 0;
6280         }
6281
6282         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6283             (!conf->beacon || !conf->ssid_len)) {
6284                 IWL_DEBUG_MAC80211
6285                     ("Leaving in AP mode because HostAPD is not ready.\n");
6286                 return 0;
6287         }
6288
6289         if (!iwl_is_alive(priv))
6290                 return -EAGAIN;
6291
6292         mutex_lock(&priv->mutex);
6293
6294         if (conf->bssid)
6295                 IWL_DEBUG_MAC80211("bssid: %s\n",
6296                                    print_mac(mac, conf->bssid));
6297
6298 /*
6299  * very dubious code was here; the probe filtering flag is never set:
6300  *
6301         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6302             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6303  */
6304
6305         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6306                 if (!conf->bssid) {
6307                         conf->bssid = priv->mac_addr;
6308                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6309                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6310                                            print_mac(mac, conf->bssid));
6311                 }
6312                 if (priv->ibss_beacon)
6313                         dev_kfree_skb(priv->ibss_beacon);
6314
6315                 priv->ibss_beacon = conf->beacon;
6316         }
6317
6318         if (iwl_is_rfkill(priv))
6319                 goto done;
6320
6321         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6322             !is_multicast_ether_addr(conf->bssid)) {
6323                 /* If there is currently a HW scan going on in the background
6324                  * then we need to cancel it else the RXON below will fail. */
6325                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6326                         IWL_WARNING("Aborted scan still in progress "
6327                                     "after 100ms\n");
6328                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6329                         mutex_unlock(&priv->mutex);
6330                         return -EAGAIN;
6331                 }
6332                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6333
6334                 /* TODO: Audit driver for usage of these members and see
6335                  * if mac80211 deprecates them (priv->bssid looks like it
6336                  * shouldn't be there, but I haven't scanned the IBSS code
6337                  * to verify) - jpk */
6338                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6339
6340                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6341                         iwl4965_config_ap(priv);
6342                 else {
6343                         rc = iwl4965_commit_rxon(priv);
6344                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6345                                 iwl4965_rxon_add_station(
6346                                         priv, priv->active_rxon.bssid_addr, 1);
6347                 }
6348
6349         } else {
6350                 iwl4965_scan_cancel_timeout(priv, 100);
6351                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6352                 iwl4965_commit_rxon(priv);
6353         }
6354
6355  done:
6356         spin_lock_irqsave(&priv->lock, flags);
6357         if (!conf->ssid_len)
6358                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6359         else
6360                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6361
6362         priv->essid_len = conf->ssid_len;
6363         spin_unlock_irqrestore(&priv->lock, flags);
6364
6365         IWL_DEBUG_MAC80211("leave\n");
6366         mutex_unlock(&priv->mutex);
6367
6368         return 0;
6369 }
6370
6371 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6372                                  unsigned int changed_flags,
6373                                  unsigned int *total_flags,
6374                                  int mc_count, struct dev_addr_list *mc_list)
6375 {
6376         /*
6377          * XXX: dummy
6378          * see also iwl4965_connection_init_rx_config
6379          */
6380         *total_flags = 0;
6381 }
6382
6383 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6384                                      struct ieee80211_if_init_conf *conf)
6385 {
6386         struct iwl_priv *priv = hw->priv;
6387
6388         IWL_DEBUG_MAC80211("enter\n");
6389
6390         mutex_lock(&priv->mutex);
6391
6392         if (iwl_is_ready_rf(priv)) {
6393                 iwl4965_scan_cancel_timeout(priv, 100);
6394                 cancel_delayed_work(&priv->post_associate);
6395                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6396                 iwl4965_commit_rxon(priv);
6397         }
6398         if (priv->vif == conf->vif) {
6399                 priv->vif = NULL;
6400                 memset(priv->bssid, 0, ETH_ALEN);
6401                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6402                 priv->essid_len = 0;
6403         }
6404         mutex_unlock(&priv->mutex);
6405
6406         IWL_DEBUG_MAC80211("leave\n");
6407
6408 }
6409
6410 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6411 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6412                                      struct ieee80211_vif *vif,
6413                                      struct ieee80211_bss_conf *bss_conf,
6414                                      u32 changes)
6415 {
6416         struct iwl_priv *priv = hw->priv;
6417
6418         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6419
6420         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6421                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6422                                    bss_conf->use_short_preamble);
6423                 if (bss_conf->use_short_preamble)
6424                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6425                 else
6426                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6427         }
6428
6429         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6430                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6431                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6432                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6433                 else
6434                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6435         }
6436
6437         if (changes & BSS_CHANGED_HT) {
6438                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6439                 iwl4965_ht_conf(priv, bss_conf);
6440                 iwl4965_set_rxon_chain(priv);
6441         }
6442
6443         if (changes & BSS_CHANGED_ASSOC) {
6444                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6445                 /* This should never happen as this function should
6446                  * never be called from interrupt context. */
6447                 if (WARN_ON_ONCE(in_interrupt()))
6448                         return;
6449                 if (bss_conf->assoc) {
6450                         priv->assoc_id = bss_conf->aid;
6451                         priv->beacon_int = bss_conf->beacon_int;
6452                         priv->timestamp = bss_conf->timestamp;
6453                         priv->assoc_capability = bss_conf->assoc_capability;
6454                         priv->next_scan_jiffies = jiffies +
6455                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6456                         mutex_lock(&priv->mutex);
6457                         iwl4965_post_associate(priv);
6458                         mutex_unlock(&priv->mutex);
6459                 } else {
6460                         priv->assoc_id = 0;
6461                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6462                 }
6463         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6464                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6465                         iwl_send_rxon_assoc(priv);
6466         }
6467
6468 }
6469
6470 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6471 {
6472         int rc = 0;
6473         unsigned long flags;
6474         struct iwl_priv *priv = hw->priv;
6475
6476         IWL_DEBUG_MAC80211("enter\n");
6477
6478         mutex_lock(&priv->mutex);
6479         spin_lock_irqsave(&priv->lock, flags);
6480
6481         if (!iwl_is_ready_rf(priv)) {
6482                 rc = -EIO;
6483                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6484                 goto out_unlock;
6485         }
6486
6487         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6488                 rc = -EIO;
6489                 IWL_ERROR("ERROR: APs don't scan\n");
6490                 goto out_unlock;
6491         }
6492
6493         /* we don't schedule scan within next_scan_jiffies period */
6494         if (priv->next_scan_jiffies &&
6495                         time_after(priv->next_scan_jiffies, jiffies)) {
6496                 rc = -EAGAIN;
6497                 goto out_unlock;
6498         }
6499         /* if we just finished scan ask for delay */
6500         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6501                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
6502                 rc = -EAGAIN;
6503                 goto out_unlock;
6504         }
6505         if (len) {
6506                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6507                                iwl4965_escape_essid(ssid, len), (int)len);
6508
6509                 priv->one_direct_scan = 1;
6510                 priv->direct_ssid_len = (u8)
6511                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6512                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6513         } else
6514                 priv->one_direct_scan = 0;
6515
6516         rc = iwl4965_scan_initiate(priv);
6517
6518         IWL_DEBUG_MAC80211("leave\n");
6519
6520 out_unlock:
6521         spin_unlock_irqrestore(&priv->lock, flags);
6522         mutex_unlock(&priv->mutex);
6523
6524         return rc;
6525 }
6526
6527 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6528                         struct ieee80211_key_conf *keyconf, const u8 *addr,
6529                         u32 iv32, u16 *phase1key)
6530 {
6531         struct iwl_priv *priv = hw->priv;
6532         u8 sta_id = IWL_INVALID_STATION;
6533         unsigned long flags;
6534         __le16 key_flags = 0;
6535         int i;
6536         DECLARE_MAC_BUF(mac);
6537
6538         IWL_DEBUG_MAC80211("enter\n");
6539
6540         sta_id = iwl_find_station(priv, addr);
6541         if (sta_id == IWL_INVALID_STATION) {
6542                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6543                                    print_mac(mac, addr));
6544                 return;
6545         }
6546
6547         iwl4965_scan_cancel_timeout(priv, 100);
6548
6549         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6550         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6551         key_flags &= ~STA_KEY_FLG_INVALID;
6552
6553         if (sta_id == priv->hw_params.bcast_sta_id)
6554                 key_flags |= STA_KEY_MULTICAST_MSK;
6555
6556         spin_lock_irqsave(&priv->sta_lock, flags);
6557
6558         priv->stations[sta_id].sta.key.key_flags = key_flags;
6559         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6560
6561         for (i = 0; i < 5; i++)
6562                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6563                         cpu_to_le16(phase1key[i]);
6564
6565         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6566         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6567
6568         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6569
6570         spin_unlock_irqrestore(&priv->sta_lock, flags);
6571
6572         IWL_DEBUG_MAC80211("leave\n");
6573 }
6574
6575 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6576                            const u8 *local_addr, const u8 *addr,
6577                            struct ieee80211_key_conf *key)
6578 {
6579         struct iwl_priv *priv = hw->priv;
6580         DECLARE_MAC_BUF(mac);
6581         int ret = 0;
6582         u8 sta_id = IWL_INVALID_STATION;
6583         u8 is_default_wep_key = 0;
6584
6585         IWL_DEBUG_MAC80211("enter\n");
6586
6587         if (priv->hw_params.sw_crypto) {
6588                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6589                 return -EOPNOTSUPP;
6590         }
6591
6592         if (is_zero_ether_addr(addr))
6593                 /* only support pairwise keys */
6594                 return -EOPNOTSUPP;
6595
6596         sta_id = iwl_find_station(priv, addr);
6597         if (sta_id == IWL_INVALID_STATION) {
6598                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6599                                    print_mac(mac, addr));
6600                 return -EINVAL;
6601
6602         }
6603
6604         mutex_lock(&priv->mutex);
6605         iwl4965_scan_cancel_timeout(priv, 100);
6606         mutex_unlock(&priv->mutex);
6607
6608         /* If we are getting WEP group key and we didn't receive any key mapping
6609          * so far, we are in legacy wep mode (group key only), otherwise we are
6610          * in 1X mode.
6611          * In legacy wep mode, we use another host command to the uCode */
6612         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6613                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6614                 if (cmd == SET_KEY)
6615                         is_default_wep_key = !priv->key_mapping_key;
6616                 else
6617                         is_default_wep_key = priv->default_wep_key;
6618         }
6619
6620         switch (cmd) {
6621         case SET_KEY:
6622                 if (is_default_wep_key)
6623                         ret = iwl_set_default_wep_key(priv, key);
6624                 else
6625                         ret = iwl_set_dynamic_key(priv, key, sta_id);
6626
6627                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6628                 break;
6629         case DISABLE_KEY:
6630                 if (is_default_wep_key)
6631                         ret = iwl_remove_default_wep_key(priv, key);
6632                 else
6633                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
6634
6635                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6636                 break;
6637         default:
6638                 ret = -EINVAL;
6639         }
6640
6641         IWL_DEBUG_MAC80211("leave\n");
6642
6643         return ret;
6644 }
6645
6646 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6647                            const struct ieee80211_tx_queue_params *params)
6648 {
6649         struct iwl_priv *priv = hw->priv;
6650         unsigned long flags;
6651         int q;
6652
6653         IWL_DEBUG_MAC80211("enter\n");
6654
6655         if (!iwl_is_ready_rf(priv)) {
6656                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6657                 return -EIO;
6658         }
6659
6660         if (queue >= AC_NUM) {
6661                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6662                 return 0;
6663         }
6664
6665         if (!priv->qos_data.qos_enable) {
6666                 priv->qos_data.qos_active = 0;
6667                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6668                 return 0;
6669         }
6670         q = AC_NUM - 1 - queue;
6671
6672         spin_lock_irqsave(&priv->lock, flags);
6673
6674         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6675         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6676         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6677         priv->qos_data.def_qos_parm.ac[q].edca_txop =
6678                         cpu_to_le16((params->txop * 32));
6679
6680         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6681         priv->qos_data.qos_active = 1;
6682
6683         spin_unlock_irqrestore(&priv->lock, flags);
6684
6685         mutex_lock(&priv->mutex);
6686         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6687                 iwl4965_activate_qos(priv, 1);
6688         else if (priv->assoc_id && iwl_is_associated(priv))
6689                 iwl4965_activate_qos(priv, 0);
6690
6691         mutex_unlock(&priv->mutex);
6692
6693         IWL_DEBUG_MAC80211("leave\n");
6694         return 0;
6695 }
6696
6697 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6698                                 struct ieee80211_tx_queue_stats *stats)
6699 {
6700         struct iwl_priv *priv = hw->priv;
6701         int i, avail;
6702         struct iwl4965_tx_queue *txq;
6703         struct iwl4965_queue *q;
6704         unsigned long flags;
6705
6706         IWL_DEBUG_MAC80211("enter\n");
6707
6708         if (!iwl_is_ready_rf(priv)) {
6709                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6710                 return -EIO;
6711         }
6712
6713         spin_lock_irqsave(&priv->lock, flags);
6714
6715         for (i = 0; i < AC_NUM; i++) {
6716                 txq = &priv->txq[i];
6717                 q = &txq->q;
6718                 avail = iwl4965_queue_space(q);
6719
6720                 stats->data[i].len = q->n_window - avail;
6721                 stats->data[i].limit = q->n_window - q->high_mark;
6722                 stats->data[i].count = q->n_window;
6723
6724         }
6725         spin_unlock_irqrestore(&priv->lock, flags);
6726
6727         IWL_DEBUG_MAC80211("leave\n");
6728
6729         return 0;
6730 }
6731
6732 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6733                              struct ieee80211_low_level_stats *stats)
6734 {
6735         IWL_DEBUG_MAC80211("enter\n");
6736         IWL_DEBUG_MAC80211("leave\n");
6737
6738         return 0;
6739 }
6740
6741 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6742 {
6743         IWL_DEBUG_MAC80211("enter\n");
6744         IWL_DEBUG_MAC80211("leave\n");
6745
6746         return 0;
6747 }
6748
6749 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6750 {
6751         struct iwl_priv *priv = hw->priv;
6752         unsigned long flags;
6753
6754         mutex_lock(&priv->mutex);
6755         IWL_DEBUG_MAC80211("enter\n");
6756
6757         priv->lq_mngr.lq_ready = 0;
6758 #ifdef CONFIG_IWL4965_HT
6759         spin_lock_irqsave(&priv->lock, flags);
6760         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6761         spin_unlock_irqrestore(&priv->lock, flags);
6762 #endif /* CONFIG_IWL4965_HT */
6763
6764         iwlcore_reset_qos(priv);
6765
6766         cancel_delayed_work(&priv->post_associate);
6767
6768         spin_lock_irqsave(&priv->lock, flags);
6769         priv->assoc_id = 0;
6770         priv->assoc_capability = 0;
6771         priv->assoc_station_added = 0;
6772
6773         /* new association get rid of ibss beacon skb */
6774         if (priv->ibss_beacon)
6775                 dev_kfree_skb(priv->ibss_beacon);
6776
6777         priv->ibss_beacon = NULL;
6778
6779         priv->beacon_int = priv->hw->conf.beacon_int;
6780         priv->timestamp = 0;
6781         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6782                 priv->beacon_int = 0;
6783
6784         spin_unlock_irqrestore(&priv->lock, flags);
6785
6786         if (!iwl_is_ready_rf(priv)) {
6787                 IWL_DEBUG_MAC80211("leave - not ready\n");
6788                 mutex_unlock(&priv->mutex);
6789                 return;
6790         }
6791
6792         /* we are restarting association process
6793          * clear RXON_FILTER_ASSOC_MSK bit
6794          */
6795         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6796                 iwl4965_scan_cancel_timeout(priv, 100);
6797                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6798                 iwl4965_commit_rxon(priv);
6799         }
6800
6801         iwl_power_update_mode(priv, 0);
6802
6803         /* Per mac80211.h: This is only used in IBSS mode... */
6804         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6805
6806                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6807                 mutex_unlock(&priv->mutex);
6808                 return;
6809         }
6810
6811         iwl4965_set_rate(priv);
6812
6813         mutex_unlock(&priv->mutex);
6814
6815         IWL_DEBUG_MAC80211("leave\n");
6816 }
6817
6818 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
6819                                  struct ieee80211_tx_control *control)
6820 {
6821         struct iwl_priv *priv = hw->priv;
6822         unsigned long flags;
6823
6824         mutex_lock(&priv->mutex);
6825         IWL_DEBUG_MAC80211("enter\n");
6826
6827         if (!iwl_is_ready_rf(priv)) {
6828                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6829                 mutex_unlock(&priv->mutex);
6830                 return -EIO;
6831         }
6832
6833         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6834                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6835                 mutex_unlock(&priv->mutex);
6836                 return -EIO;
6837         }
6838
6839         spin_lock_irqsave(&priv->lock, flags);
6840
6841         if (priv->ibss_beacon)
6842                 dev_kfree_skb(priv->ibss_beacon);
6843
6844         priv->ibss_beacon = skb;
6845
6846         priv->assoc_id = 0;
6847
6848         IWL_DEBUG_MAC80211("leave\n");
6849         spin_unlock_irqrestore(&priv->lock, flags);
6850
6851         iwlcore_reset_qos(priv);
6852
6853         queue_work(priv->workqueue, &priv->post_associate.work);
6854
6855         mutex_unlock(&priv->mutex);
6856
6857         return 0;
6858 }
6859
6860 /*****************************************************************************
6861  *
6862  * sysfs attributes
6863  *
6864  *****************************************************************************/
6865
6866 #ifdef CONFIG_IWLWIFI_DEBUG
6867
6868 /*
6869  * The following adds a new attribute to the sysfs representation
6870  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6871  * used for controlling the debug level.
6872  *
6873  * See the level definitions in iwl for details.
6874  */
6875
6876 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6877 {
6878         return sprintf(buf, "0x%08X\n", iwl_debug_level);
6879 }
6880 static ssize_t store_debug_level(struct device_driver *d,
6881                                  const char *buf, size_t count)
6882 {
6883         char *p = (char *)buf;
6884         u32 val;
6885
6886         val = simple_strtoul(p, &p, 0);
6887         if (p == buf)
6888                 printk(KERN_INFO DRV_NAME
6889                        ": %s is not in hex or decimal form.\n", buf);
6890         else
6891                 iwl_debug_level = val;
6892
6893         return strnlen(buf, count);
6894 }
6895
6896 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6897                    show_debug_level, store_debug_level);
6898
6899 #endif /* CONFIG_IWLWIFI_DEBUG */
6900
6901
6902 static ssize_t show_temperature(struct device *d,
6903                                 struct device_attribute *attr, char *buf)
6904 {
6905         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6906
6907         if (!iwl_is_alive(priv))
6908                 return -EAGAIN;
6909
6910         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6911 }
6912
6913 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6914
6915 static ssize_t show_rs_window(struct device *d,
6916                               struct device_attribute *attr,
6917                               char *buf)
6918 {
6919         struct iwl_priv *priv = d->driver_data;
6920         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
6921 }
6922 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
6923
6924 static ssize_t show_tx_power(struct device *d,
6925                              struct device_attribute *attr, char *buf)
6926 {
6927         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6928         return sprintf(buf, "%d\n", priv->user_txpower_limit);
6929 }
6930
6931 static ssize_t store_tx_power(struct device *d,
6932                               struct device_attribute *attr,
6933                               const char *buf, size_t count)
6934 {
6935         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6936         char *p = (char *)buf;
6937         u32 val;
6938
6939         val = simple_strtoul(p, &p, 10);
6940         if (p == buf)
6941                 printk(KERN_INFO DRV_NAME
6942                        ": %s is not in decimal form.\n", buf);
6943         else
6944                 iwl4965_hw_reg_set_txpower(priv, val);
6945
6946         return count;
6947 }
6948
6949 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6950
6951 static ssize_t show_flags(struct device *d,
6952                           struct device_attribute *attr, char *buf)
6953 {
6954         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6955
6956         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
6957 }
6958
6959 static ssize_t store_flags(struct device *d,
6960                            struct device_attribute *attr,
6961                            const char *buf, size_t count)
6962 {
6963         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6964         u32 flags = simple_strtoul(buf, NULL, 0);
6965
6966         mutex_lock(&priv->mutex);
6967         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
6968                 /* Cancel any currently running scans... */
6969                 if (iwl4965_scan_cancel_timeout(priv, 100))
6970                         IWL_WARNING("Could not cancel scan.\n");
6971                 else {
6972                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6973                                        flags);
6974                         priv->staging_rxon.flags = cpu_to_le32(flags);
6975                         iwl4965_commit_rxon(priv);
6976                 }
6977         }
6978         mutex_unlock(&priv->mutex);
6979
6980         return count;
6981 }
6982
6983 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6984
6985 static ssize_t show_filter_flags(struct device *d,
6986                                  struct device_attribute *attr, char *buf)
6987 {
6988         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6989
6990         return sprintf(buf, "0x%04X\n",
6991                 le32_to_cpu(priv->active_rxon.filter_flags));
6992 }
6993
6994 static ssize_t store_filter_flags(struct device *d,
6995                                   struct device_attribute *attr,
6996                                   const char *buf, size_t count)
6997 {
6998         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6999         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7000
7001         mutex_lock(&priv->mutex);
7002         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7003                 /* Cancel any currently running scans... */
7004                 if (iwl4965_scan_cancel_timeout(priv, 100))
7005                         IWL_WARNING("Could not cancel scan.\n");
7006                 else {
7007                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7008                                        "0x%04X\n", filter_flags);
7009                         priv->staging_rxon.filter_flags =
7010                                 cpu_to_le32(filter_flags);
7011                         iwl4965_commit_rxon(priv);
7012                 }
7013         }
7014         mutex_unlock(&priv->mutex);
7015
7016         return count;
7017 }
7018
7019 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7020                    store_filter_flags);
7021
7022 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7023
7024 static ssize_t show_measurement(struct device *d,
7025                                 struct device_attribute *attr, char *buf)
7026 {
7027         struct iwl_priv *priv = dev_get_drvdata(d);
7028         struct iwl4965_spectrum_notification measure_report;
7029         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7030         u8 *data = (u8 *) & measure_report;
7031         unsigned long flags;
7032
7033         spin_lock_irqsave(&priv->lock, flags);
7034         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7035                 spin_unlock_irqrestore(&priv->lock, flags);
7036                 return 0;
7037         }
7038         memcpy(&measure_report, &priv->measure_report, size);
7039         priv->measurement_status = 0;
7040         spin_unlock_irqrestore(&priv->lock, flags);
7041
7042         while (size && (PAGE_SIZE - len)) {
7043                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7044                                    PAGE_SIZE - len, 1);
7045                 len = strlen(buf);
7046                 if (PAGE_SIZE - len)
7047                         buf[len++] = '\n';
7048
7049                 ofs += 16;
7050                 size -= min(size, 16U);
7051         }
7052
7053         return len;
7054 }
7055
7056 static ssize_t store_measurement(struct device *d,
7057                                  struct device_attribute *attr,
7058                                  const char *buf, size_t count)
7059 {
7060         struct iwl_priv *priv = dev_get_drvdata(d);
7061         struct ieee80211_measurement_params params = {
7062                 .channel = le16_to_cpu(priv->active_rxon.channel),
7063                 .start_time = cpu_to_le64(priv->last_tsf),
7064                 .duration = cpu_to_le16(1),
7065         };
7066         u8 type = IWL_MEASURE_BASIC;
7067         u8 buffer[32];
7068         u8 channel;
7069
7070         if (count) {
7071                 char *p = buffer;
7072                 strncpy(buffer, buf, min(sizeof(buffer), count));
7073                 channel = simple_strtoul(p, NULL, 0);
7074                 if (channel)
7075                         params.channel = channel;
7076
7077                 p = buffer;
7078                 while (*p && *p != ' ')
7079                         p++;
7080                 if (*p)
7081                         type = simple_strtoul(p + 1, NULL, 0);
7082         }
7083
7084         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7085                        "channel %d (for '%s')\n", type, params.channel, buf);
7086         iwl4965_get_measurement(priv, &params, type);
7087
7088         return count;
7089 }
7090
7091 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7092                    show_measurement, store_measurement);
7093 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7094
7095 static ssize_t store_retry_rate(struct device *d,
7096                                 struct device_attribute *attr,
7097                                 const char *buf, size_t count)
7098 {
7099         struct iwl_priv *priv = dev_get_drvdata(d);
7100
7101         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7102         if (priv->retry_rate <= 0)
7103                 priv->retry_rate = 1;
7104
7105         return count;
7106 }
7107
7108 static ssize_t show_retry_rate(struct device *d,
7109                                struct device_attribute *attr, char *buf)
7110 {
7111         struct iwl_priv *priv = dev_get_drvdata(d);
7112         return sprintf(buf, "%d", priv->retry_rate);
7113 }
7114
7115 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7116                    store_retry_rate);
7117
7118 static ssize_t store_power_level(struct device *d,
7119                                  struct device_attribute *attr,
7120                                  const char *buf, size_t count)
7121 {
7122         struct iwl_priv *priv = dev_get_drvdata(d);
7123         int rc;
7124         int mode;
7125
7126         mode = simple_strtoul(buf, NULL, 0);
7127         mutex_lock(&priv->mutex);
7128
7129         if (!iwl_is_ready(priv)) {
7130                 rc = -EAGAIN;
7131                 goto out;
7132         }
7133
7134         rc = iwl_power_set_user_mode(priv, mode);
7135         if (rc) {
7136                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7137                 goto out;
7138         }
7139         rc = count;
7140
7141  out:
7142         mutex_unlock(&priv->mutex);
7143         return rc;
7144 }
7145
7146 #define MAX_WX_STRING 80
7147
7148 /* Values are in microsecond */
7149 static const s32 timeout_duration[] = {
7150         350000,
7151         250000,
7152         75000,
7153         37000,
7154         25000,
7155 };
7156 static const s32 period_duration[] = {
7157         400000,
7158         700000,
7159         1000000,
7160         1000000,
7161         1000000
7162 };
7163
7164 static ssize_t show_power_level(struct device *d,
7165                                 struct device_attribute *attr, char *buf)
7166 {
7167         struct iwl_priv *priv = dev_get_drvdata(d);
7168         int level = priv->power_data.power_mode;
7169         char *p = buf;
7170
7171         p += sprintf(p, "%d ", level);
7172         switch (level) {
7173         case IWL_POWER_MODE_CAM:
7174         case IWL_POWER_AC:
7175                 p += sprintf(p, "(AC)");
7176                 break;
7177         case IWL_POWER_BATTERY:
7178                 p += sprintf(p, "(BATTERY)");
7179                 break;
7180         default:
7181                 p += sprintf(p,
7182                              "(Timeout %dms, Period %dms)",
7183                              timeout_duration[level - 1] / 1000,
7184                              period_duration[level - 1] / 1000);
7185         }
7186 /*
7187         if (!(priv->power_mode & IWL_POWER_ENABLED))
7188                 p += sprintf(p, " OFF\n");
7189         else
7190                 p += sprintf(p, " \n");
7191 */
7192         p += sprintf(p, " \n");
7193         return (p - buf + 1);
7194 }
7195
7196 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7197                    store_power_level);
7198
7199 static ssize_t show_channels(struct device *d,
7200                              struct device_attribute *attr, char *buf)
7201 {
7202         /* all this shit doesn't belong into sysfs anyway */
7203         return 0;
7204 }
7205
7206 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7207
7208 static ssize_t show_statistics(struct device *d,
7209                                struct device_attribute *attr, char *buf)
7210 {
7211         struct iwl_priv *priv = dev_get_drvdata(d);
7212         u32 size = sizeof(struct iwl4965_notif_statistics);
7213         u32 len = 0, ofs = 0;
7214         u8 *data = (u8 *) & priv->statistics;
7215         int rc = 0;
7216
7217         if (!iwl_is_alive(priv))
7218                 return -EAGAIN;
7219
7220         mutex_lock(&priv->mutex);
7221         rc = iwl_send_statistics_request(priv, 0);
7222         mutex_unlock(&priv->mutex);
7223
7224         if (rc) {
7225                 len = sprintf(buf,
7226                               "Error sending statistics request: 0x%08X\n", rc);
7227                 return len;
7228         }
7229
7230         while (size && (PAGE_SIZE - len)) {
7231                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7232                                    PAGE_SIZE - len, 1);
7233                 len = strlen(buf);
7234                 if (PAGE_SIZE - len)
7235                         buf[len++] = '\n';
7236
7237                 ofs += 16;
7238                 size -= min(size, 16U);
7239         }
7240
7241         return len;
7242 }
7243
7244 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7245
7246 static ssize_t show_status(struct device *d,
7247                            struct device_attribute *attr, char *buf)
7248 {
7249         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7250         if (!iwl_is_alive(priv))
7251                 return -EAGAIN;
7252         return sprintf(buf, "0x%08x\n", (int)priv->status);
7253 }
7254
7255 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7256
7257 static ssize_t dump_error_log(struct device *d,
7258                               struct device_attribute *attr,
7259                               const char *buf, size_t count)
7260 {
7261         char *p = (char *)buf;
7262
7263         if (p[0] == '1')
7264                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7265
7266         return strnlen(buf, count);
7267 }
7268
7269 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7270
7271 static ssize_t dump_event_log(struct device *d,
7272                               struct device_attribute *attr,
7273                               const char *buf, size_t count)
7274 {
7275         char *p = (char *)buf;
7276
7277         if (p[0] == '1')
7278                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7279
7280         return strnlen(buf, count);
7281 }
7282
7283 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7284
7285 /*****************************************************************************
7286  *
7287  * driver setup and teardown
7288  *
7289  *****************************************************************************/
7290
7291 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7292 {
7293         priv->workqueue = create_workqueue(DRV_NAME);
7294
7295         init_waitqueue_head(&priv->wait_command_queue);
7296
7297         INIT_WORK(&priv->up, iwl4965_bg_up);
7298         INIT_WORK(&priv->restart, iwl4965_bg_restart);
7299         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7300         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7301         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7302         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7303         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7304         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7305         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7306         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7307         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7308         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7309
7310         iwl4965_hw_setup_deferred_work(priv);
7311
7312         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7313                      iwl4965_irq_tasklet, (unsigned long)priv);
7314 }
7315
7316 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7317 {
7318         iwl4965_hw_cancel_deferred_work(priv);
7319
7320         cancel_delayed_work_sync(&priv->init_alive_start);
7321         cancel_delayed_work(&priv->scan_check);
7322         cancel_delayed_work(&priv->alive_start);
7323         cancel_delayed_work(&priv->post_associate);
7324         cancel_work_sync(&priv->beacon_update);
7325 }
7326
7327 static struct attribute *iwl4965_sysfs_entries[] = {
7328         &dev_attr_channels.attr,
7329         &dev_attr_dump_errors.attr,
7330         &dev_attr_dump_events.attr,
7331         &dev_attr_flags.attr,
7332         &dev_attr_filter_flags.attr,
7333 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7334         &dev_attr_measurement.attr,
7335 #endif
7336         &dev_attr_power_level.attr,
7337         &dev_attr_retry_rate.attr,
7338         &dev_attr_rs_window.attr,
7339         &dev_attr_statistics.attr,
7340         &dev_attr_status.attr,
7341         &dev_attr_temperature.attr,
7342         &dev_attr_tx_power.attr,
7343
7344         NULL
7345 };
7346
7347 static struct attribute_group iwl4965_attribute_group = {
7348         .name = NULL,           /* put in device directory */
7349         .attrs = iwl4965_sysfs_entries,
7350 };
7351
7352 static struct ieee80211_ops iwl4965_hw_ops = {
7353         .tx = iwl4965_mac_tx,
7354         .start = iwl4965_mac_start,
7355         .stop = iwl4965_mac_stop,
7356         .add_interface = iwl4965_mac_add_interface,
7357         .remove_interface = iwl4965_mac_remove_interface,
7358         .config = iwl4965_mac_config,
7359         .config_interface = iwl4965_mac_config_interface,
7360         .configure_filter = iwl4965_configure_filter,
7361         .set_key = iwl4965_mac_set_key,
7362         .update_tkip_key = iwl4965_mac_update_tkip_key,
7363         .get_stats = iwl4965_mac_get_stats,
7364         .get_tx_stats = iwl4965_mac_get_tx_stats,
7365         .conf_tx = iwl4965_mac_conf_tx,
7366         .get_tsf = iwl4965_mac_get_tsf,
7367         .reset_tsf = iwl4965_mac_reset_tsf,
7368         .beacon_update = iwl4965_mac_beacon_update,
7369         .bss_info_changed = iwl4965_bss_info_changed,
7370 #ifdef CONFIG_IWL4965_HT
7371         .ampdu_action = iwl4965_mac_ampdu_action,
7372 #endif  /* CONFIG_IWL4965_HT */
7373         .hw_scan = iwl4965_mac_hw_scan
7374 };
7375
7376 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7377 {
7378         int err = 0;
7379         struct iwl_priv *priv;
7380         struct ieee80211_hw *hw;
7381         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7382         unsigned long flags;
7383         DECLARE_MAC_BUF(mac);
7384
7385         /************************
7386          * 1. Allocating HW data
7387          ************************/
7388
7389         /* Disabling hardware scan means that mac80211 will perform scans
7390          * "the hard way", rather than using device's scan. */
7391         if (cfg->mod_params->disable_hw_scan) {
7392                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7393                 iwl4965_hw_ops.hw_scan = NULL;
7394         }
7395
7396         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7397         if (!hw) {
7398                 err = -ENOMEM;
7399                 goto out;
7400         }
7401         priv = hw->priv;
7402         /* At this point both hw and priv are allocated. */
7403
7404         SET_IEEE80211_DEV(hw, &pdev->dev);
7405
7406         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7407         priv->cfg = cfg;
7408         priv->pci_dev = pdev;
7409
7410 #ifdef CONFIG_IWLWIFI_DEBUG
7411         iwl_debug_level = priv->cfg->mod_params->debug;
7412         atomic_set(&priv->restrict_refcnt, 0);
7413 #endif
7414
7415         /**************************
7416          * 2. Initializing PCI bus
7417          **************************/
7418         if (pci_enable_device(pdev)) {
7419                 err = -ENODEV;
7420                 goto out_ieee80211_free_hw;
7421         }
7422
7423         pci_set_master(pdev);
7424
7425         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
7426         if (!err)
7427                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
7428         if (err) {
7429                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7430                 if (!err)
7431                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7432                 /* both attempts failed: */
7433                 if (err) {
7434                         printk(KERN_WARNING "%s: No suitable DMA available.\n",
7435                                 DRV_NAME);
7436                         goto out_pci_disable_device;
7437                 }
7438         }
7439
7440         err = pci_request_regions(pdev, DRV_NAME);
7441         if (err)
7442                 goto out_pci_disable_device;
7443
7444         pci_set_drvdata(pdev, priv);
7445
7446         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7447          * PCI Tx retries from interfering with C3 CPU state */
7448         pci_write_config_byte(pdev, 0x41, 0x00);
7449
7450         /***********************
7451          * 3. Read REV register
7452          ***********************/
7453         priv->hw_base = pci_iomap(pdev, 0, 0);
7454         if (!priv->hw_base) {
7455                 err = -ENODEV;
7456                 goto out_pci_release_regions;
7457         }
7458
7459         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7460                 (unsigned long long) pci_resource_len(pdev, 0));
7461         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7462
7463         iwl_hw_detect(priv);
7464         printk(KERN_INFO DRV_NAME
7465                 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
7466                 priv->cfg->name, priv->hw_rev);
7467
7468         /* amp init */
7469         err = priv->cfg->ops->lib->apm_ops.init(priv);
7470         if (err < 0) {
7471                 IWL_DEBUG_INFO("Failed to init APMG\n");
7472                 goto out_iounmap;
7473         }
7474         /*****************
7475          * 4. Read EEPROM
7476          *****************/
7477         /* Read the EEPROM */
7478         err = iwl_eeprom_init(priv);
7479         if (err) {
7480                 IWL_ERROR("Unable to init EEPROM\n");
7481                 goto out_iounmap;
7482         }
7483         err = iwl_eeprom_check_version(priv);
7484         if (err)
7485                 goto out_iounmap;
7486
7487         /* MAC Address location in EEPROM same for 3945/4965 */
7488         iwl_eeprom_get_mac(priv, priv->mac_addr);
7489         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7490         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7491
7492         /************************
7493          * 5. Setup HW constants
7494          ************************/
7495         /* Device-specific setup */
7496         if (priv->cfg->ops->lib->set_hw_params(priv)) {
7497                 IWL_ERROR("failed to set hw parameters\n");
7498                 goto out_free_eeprom;
7499         }
7500
7501         /*******************
7502          * 6. Setup hw/priv
7503          *******************/
7504
7505         err = iwl_setup(priv);
7506         if (err)
7507                 goto out_free_eeprom;
7508         /* At this point both hw and priv are initialized. */
7509
7510         /**********************************
7511          * 7. Initialize module parameters
7512          **********************************/
7513
7514         /* Disable radio (SW RF KILL) via parameter when loading driver */
7515         if (priv->cfg->mod_params->disable) {
7516                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7517                 IWL_DEBUG_INFO("Radio disabled.\n");
7518         }
7519
7520         if (priv->cfg->mod_params->enable_qos)
7521                 priv->qos_data.qos_enable = 1;
7522
7523         /********************
7524          * 8. Setup services
7525          ********************/
7526         spin_lock_irqsave(&priv->lock, flags);
7527         iwl4965_disable_interrupts(priv);
7528         spin_unlock_irqrestore(&priv->lock, flags);
7529
7530         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7531         if (err) {
7532                 IWL_ERROR("failed to create sysfs device attributes\n");
7533                 goto out_free_eeprom;
7534         }
7535
7536         err = iwl_dbgfs_register(priv, DRV_NAME);
7537         if (err) {
7538                 IWL_ERROR("failed to create debugfs files\n");
7539                 goto out_remove_sysfs;
7540         }
7541
7542         iwl4965_setup_deferred_work(priv);
7543         iwl4965_setup_rx_handlers(priv);
7544
7545         /********************
7546          * 9. Conclude
7547          ********************/
7548         pci_save_state(pdev);
7549         pci_disable_device(pdev);
7550
7551         /* notify iwlcore to init */
7552         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7553         return 0;
7554
7555  out_remove_sysfs:
7556         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7557  out_free_eeprom:
7558         iwl_eeprom_free(priv);
7559  out_iounmap:
7560         pci_iounmap(pdev, priv->hw_base);
7561  out_pci_release_regions:
7562         pci_release_regions(pdev);
7563         pci_set_drvdata(pdev, NULL);
7564  out_pci_disable_device:
7565         pci_disable_device(pdev);
7566  out_ieee80211_free_hw:
7567         ieee80211_free_hw(priv->hw);
7568  out:
7569         return err;
7570 }
7571
7572 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7573 {
7574         struct iwl_priv *priv = pci_get_drvdata(pdev);
7575         struct list_head *p, *q;
7576         int i;
7577         unsigned long flags;
7578
7579         if (!priv)
7580                 return;
7581
7582         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7583
7584         if (priv->mac80211_registered) {
7585                 ieee80211_unregister_hw(priv->hw);
7586                 priv->mac80211_registered = 0;
7587         }
7588
7589         set_bit(STATUS_EXIT_PENDING, &priv->status);
7590
7591         iwl4965_down(priv);
7592
7593         /* make sure we flush any pending irq or
7594          * tasklet for the driver
7595          */
7596         spin_lock_irqsave(&priv->lock, flags);
7597         iwl4965_disable_interrupts(priv);
7598         spin_unlock_irqrestore(&priv->lock, flags);
7599
7600         iwl_synchronize_irq(priv);
7601
7602         /* Free MAC hash list for ADHOC */
7603         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7604                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7605                         list_del(p);
7606                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7607                 }
7608         }
7609
7610         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7611         iwl_dbgfs_unregister(priv);
7612         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7613
7614         iwl4965_dealloc_ucode_pci(priv);
7615
7616         if (priv->rxq.bd)
7617                 iwl4965_rx_queue_free(priv, &priv->rxq);
7618         iwl4965_hw_txq_ctx_free(priv);
7619
7620         iwlcore_clear_stations_table(priv);
7621         iwl_eeprom_free(priv);
7622
7623
7624         /*netif_stop_queue(dev); */
7625         flush_workqueue(priv->workqueue);
7626
7627         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7628          * priv->workqueue... so we can't take down the workqueue
7629          * until now... */
7630         destroy_workqueue(priv->workqueue);
7631         priv->workqueue = NULL;
7632
7633         pci_iounmap(pdev, priv->hw_base);
7634         pci_release_regions(pdev);
7635         pci_disable_device(pdev);
7636         pci_set_drvdata(pdev, NULL);
7637
7638         iwl_free_channel_map(priv);
7639         iwl4965_free_geos(priv);
7640
7641         if (priv->ibss_beacon)
7642                 dev_kfree_skb(priv->ibss_beacon);
7643
7644         ieee80211_free_hw(priv->hw);
7645 }
7646
7647 #ifdef CONFIG_PM
7648
7649 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7650 {
7651         struct iwl_priv *priv = pci_get_drvdata(pdev);
7652
7653         if (priv->is_open) {
7654                 set_bit(STATUS_IN_SUSPEND, &priv->status);
7655                 iwl4965_mac_stop(priv->hw);
7656                 priv->is_open = 1;
7657         }
7658
7659         pci_set_power_state(pdev, PCI_D3hot);
7660
7661         return 0;
7662 }
7663
7664 static int iwl4965_pci_resume(struct pci_dev *pdev)
7665 {
7666         struct iwl_priv *priv = pci_get_drvdata(pdev);
7667
7668         pci_set_power_state(pdev, PCI_D0);
7669
7670         if (priv->is_open)
7671                 iwl4965_mac_start(priv->hw);
7672
7673         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7674         return 0;
7675 }
7676
7677 #endif /* CONFIG_PM */
7678
7679 /*****************************************************************************
7680  *
7681  * driver and module entry point
7682  *
7683  *****************************************************************************/
7684
7685 /* Hardware specific file defines the PCI IDs table for that hardware module */
7686 static struct pci_device_id iwl_hw_card_ids[] = {
7687         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7688         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7689         {0}
7690 };
7691 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7692
7693 static struct pci_driver iwl_driver = {
7694         .name = DRV_NAME,
7695         .id_table = iwl_hw_card_ids,
7696         .probe = iwl4965_pci_probe,
7697         .remove = __devexit_p(iwl4965_pci_remove),
7698 #ifdef CONFIG_PM
7699         .suspend = iwl4965_pci_suspend,
7700         .resume = iwl4965_pci_resume,
7701 #endif
7702 };
7703
7704 static int __init iwl4965_init(void)
7705 {
7706
7707         int ret;
7708         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7709         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7710
7711         ret = iwl4965_rate_control_register();
7712         if (ret) {
7713                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7714                 return ret;
7715         }
7716
7717         ret = pci_register_driver(&iwl_driver);
7718         if (ret) {
7719                 IWL_ERROR("Unable to initialize PCI module\n");
7720                 goto error_register;
7721         }
7722 #ifdef CONFIG_IWLWIFI_DEBUG
7723         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7724         if (ret) {
7725                 IWL_ERROR("Unable to create driver sysfs file\n");
7726                 goto error_debug;
7727         }
7728 #endif
7729
7730         return ret;
7731
7732 #ifdef CONFIG_IWLWIFI_DEBUG
7733 error_debug:
7734         pci_unregister_driver(&iwl_driver);
7735 #endif
7736 error_register:
7737         iwl4965_rate_control_unregister();
7738         return ret;
7739 }
7740
7741 static void __exit iwl4965_exit(void)
7742 {
7743 #ifdef CONFIG_IWLWIFI_DEBUG
7744         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7745 #endif
7746         pci_unregister_driver(&iwl_driver);
7747         iwl4965_rate_control_unregister();
7748 }
7749
7750 module_exit(iwl4965_exit);
7751 module_init(iwl4965_init);