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