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 *iwl4965_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 static void iwl4965_unset_hw_params(struct iwl_priv *priv)
1132 {
1133         if (priv->shared_virt)
1134                 pci_free_consistent(priv->pci_dev,
1135                                     sizeof(struct iwl4965_shared),
1136                                     priv->shared_virt,
1137                                     priv->shared_phys);
1138 }
1139
1140 /**
1141  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1142  *
1143  * return : set the bit for each supported rate insert in ie
1144  */
1145 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1146                                     u16 basic_rate, int *left)
1147 {
1148         u16 ret_rates = 0, bit;
1149         int i;
1150         u8 *cnt = ie;
1151         u8 *rates = ie + 1;
1152
1153         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1154                 if (bit & supported_rate) {
1155                         ret_rates |= bit;
1156                         rates[*cnt] = iwl4965_rates[i].ieee |
1157                                 ((bit & basic_rate) ? 0x80 : 0x00);
1158                         (*cnt)++;
1159                         (*left)--;
1160                         if ((*left <= 0) ||
1161                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1162                                 break;
1163                 }
1164         }
1165
1166         return ret_rates;
1167 }
1168
1169 /**
1170  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1171  */
1172 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1173                                   enum ieee80211_band band,
1174                                   struct ieee80211_mgmt *frame,
1175                                   int left, int is_direct)
1176 {
1177         int len = 0;
1178         u8 *pos = NULL;
1179         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1180 #ifdef CONFIG_IWL4965_HT
1181         const struct ieee80211_supported_band *sband =
1182                                                 iwl4965_get_hw_mode(priv, band);
1183 #endif /* CONFIG_IWL4965_HT */
1184
1185         /* Make sure there is enough space for the probe request,
1186          * two mandatory IEs and the data */
1187         left -= 24;
1188         if (left < 0)
1189                 return 0;
1190         len += 24;
1191
1192         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1193         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1194         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1195         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1196         frame->seq_ctrl = 0;
1197
1198         /* fill in our indirect SSID IE */
1199         /* ...next IE... */
1200
1201         left -= 2;
1202         if (left < 0)
1203                 return 0;
1204         len += 2;
1205         pos = &(frame->u.probe_req.variable[0]);
1206         *pos++ = WLAN_EID_SSID;
1207         *pos++ = 0;
1208
1209         /* fill in our direct SSID IE... */
1210         if (is_direct) {
1211                 /* ...next IE... */
1212                 left -= 2 + priv->essid_len;
1213                 if (left < 0)
1214                         return 0;
1215                 /* ... fill it in... */
1216                 *pos++ = WLAN_EID_SSID;
1217                 *pos++ = priv->essid_len;
1218                 memcpy(pos, priv->essid, priv->essid_len);
1219                 pos += priv->essid_len;
1220                 len += 2 + priv->essid_len;
1221         }
1222
1223         /* fill in supported rate */
1224         /* ...next IE... */
1225         left -= 2;
1226         if (left < 0)
1227                 return 0;
1228
1229         /* ... fill it in... */
1230         *pos++ = WLAN_EID_SUPP_RATES;
1231         *pos = 0;
1232
1233         /* exclude 60M rate */
1234         active_rates = priv->rates_mask;
1235         active_rates &= ~IWL_RATE_60M_MASK;
1236
1237         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1238
1239         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1240         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1241                         active_rate_basic, &left);
1242         active_rates &= ~ret_rates;
1243
1244         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1245                                  active_rate_basic, &left);
1246         active_rates &= ~ret_rates;
1247
1248         len += 2 + *pos;
1249         pos += (*pos) + 1;
1250         if (active_rates == 0)
1251                 goto fill_end;
1252
1253         /* fill in supported extended rate */
1254         /* ...next IE... */
1255         left -= 2;
1256         if (left < 0)
1257                 return 0;
1258         /* ... fill it in... */
1259         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1260         *pos = 0;
1261         iwl4965_supported_rate_to_ie(pos, active_rates,
1262                                  active_rate_basic, &left);
1263         if (*pos > 0)
1264                 len += 2 + *pos;
1265
1266 #ifdef CONFIG_IWL4965_HT
1267         if (sband && sband->ht_info.ht_supported) {
1268                 struct ieee80211_ht_cap *ht_cap;
1269                 pos += (*pos) + 1;
1270                 *pos++ = WLAN_EID_HT_CAPABILITY;
1271                 *pos++ = sizeof(struct ieee80211_ht_cap);
1272                 ht_cap = (struct ieee80211_ht_cap *)pos;
1273                 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1274                 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1275                 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1276                                             IEEE80211_HT_CAP_AMPDU_FACTOR) |
1277                                             ((sband->ht_info.ampdu_density << 2) &
1278                                             IEEE80211_HT_CAP_AMPDU_DENSITY);
1279                 len += 2 + sizeof(struct ieee80211_ht_cap);
1280         }
1281 #endif  /*CONFIG_IWL4965_HT */
1282
1283  fill_end:
1284         return (u16)len;
1285 }
1286
1287 /*
1288  * QoS  support
1289 */
1290 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1291                                        struct iwl4965_qosparam_cmd *qos)
1292 {
1293
1294         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1295                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1296 }
1297
1298 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1299 {
1300         unsigned long flags;
1301
1302         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1303                 return;
1304
1305         if (!priv->qos_data.qos_enable)
1306                 return;
1307
1308         spin_lock_irqsave(&priv->lock, flags);
1309         priv->qos_data.def_qos_parm.qos_flags = 0;
1310
1311         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1312             !priv->qos_data.qos_cap.q_AP.txop_request)
1313                 priv->qos_data.def_qos_parm.qos_flags |=
1314                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1315         if (priv->qos_data.qos_active)
1316                 priv->qos_data.def_qos_parm.qos_flags |=
1317                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1318
1319 #ifdef CONFIG_IWL4965_HT
1320         if (priv->current_ht_config.is_ht)
1321                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1322 #endif /* CONFIG_IWL4965_HT */
1323
1324         spin_unlock_irqrestore(&priv->lock, flags);
1325
1326         if (force || iwl_is_associated(priv)) {
1327                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1328                                 priv->qos_data.qos_active,
1329                                 priv->qos_data.def_qos_parm.qos_flags);
1330
1331                 iwl4965_send_qos_params_command(priv,
1332                                 &(priv->qos_data.def_qos_parm));
1333         }
1334 }
1335
1336 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1337 {
1338         /* Filter incoming packets to determine if they are targeted toward
1339          * this network, discarding packets coming from ourselves */
1340         switch (priv->iw_mode) {
1341         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1342                 /* packets from our adapter are dropped (echo) */
1343                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1344                         return 0;
1345                 /* {broad,multi}cast packets to our IBSS go through */
1346                 if (is_multicast_ether_addr(header->addr1))
1347                         return !compare_ether_addr(header->addr3, priv->bssid);
1348                 /* packets to our adapter go through */
1349                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1350         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1351                 /* packets from our adapter are dropped (echo) */
1352                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1353                         return 0;
1354                 /* {broad,multi}cast packets to our BSS go through */
1355                 if (is_multicast_ether_addr(header->addr1))
1356                         return !compare_ether_addr(header->addr2, priv->bssid);
1357                 /* packets to our adapter go through */
1358                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1359         default:
1360                 break;
1361         }
1362
1363         return 1;
1364 }
1365
1366 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1367
1368 static const char *iwl4965_get_tx_fail_reason(u32 status)
1369 {
1370         switch (status & TX_STATUS_MSK) {
1371         case TX_STATUS_SUCCESS:
1372                 return "SUCCESS";
1373                 TX_STATUS_ENTRY(SHORT_LIMIT);
1374                 TX_STATUS_ENTRY(LONG_LIMIT);
1375                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1376                 TX_STATUS_ENTRY(MGMNT_ABORT);
1377                 TX_STATUS_ENTRY(NEXT_FRAG);
1378                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1379                 TX_STATUS_ENTRY(DEST_PS);
1380                 TX_STATUS_ENTRY(ABORTED);
1381                 TX_STATUS_ENTRY(BT_RETRY);
1382                 TX_STATUS_ENTRY(STA_INVALID);
1383                 TX_STATUS_ENTRY(FRAG_DROPPED);
1384                 TX_STATUS_ENTRY(TID_DISABLE);
1385                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1386                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1387                 TX_STATUS_ENTRY(TX_LOCKED);
1388                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1389         }
1390
1391         return "UNKNOWN";
1392 }
1393
1394 /**
1395  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1396  *
1397  * NOTE: priv->mutex is not required before calling this function
1398  */
1399 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1400 {
1401         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1402                 clear_bit(STATUS_SCANNING, &priv->status);
1403                 return 0;
1404         }
1405
1406         if (test_bit(STATUS_SCANNING, &priv->status)) {
1407                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1408                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1409                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1410                         queue_work(priv->workqueue, &priv->abort_scan);
1411
1412                 } else
1413                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1414
1415                 return test_bit(STATUS_SCANNING, &priv->status);
1416         }
1417
1418         return 0;
1419 }
1420
1421 /**
1422  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1423  * @ms: amount of time to wait (in milliseconds) for scan to abort
1424  *
1425  * NOTE: priv->mutex must be held before calling this function
1426  */
1427 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1428 {
1429         unsigned long now = jiffies;
1430         int ret;
1431
1432         ret = iwl4965_scan_cancel(priv);
1433         if (ret && ms) {
1434                 mutex_unlock(&priv->mutex);
1435                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1436                                 test_bit(STATUS_SCANNING, &priv->status))
1437                         msleep(1);
1438                 mutex_lock(&priv->mutex);
1439
1440                 return test_bit(STATUS_SCANNING, &priv->status);
1441         }
1442
1443         return ret;
1444 }
1445
1446 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1447 {
1448         /* Reset ieee stats */
1449
1450         /* We don't reset the net_device_stats (ieee->stats) on
1451          * re-association */
1452
1453         priv->last_seq_num = -1;
1454         priv->last_frag_num = -1;
1455         priv->last_packet_time = 0;
1456
1457         iwl4965_scan_cancel(priv);
1458 }
1459
1460 #define MAX_UCODE_BEACON_INTERVAL       4096
1461 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1462
1463 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1464 {
1465         u16 new_val = 0;
1466         u16 beacon_factor = 0;
1467
1468         beacon_factor =
1469             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1470                 / MAX_UCODE_BEACON_INTERVAL;
1471         new_val = beacon_val / beacon_factor;
1472
1473         return cpu_to_le16(new_val);
1474 }
1475
1476 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1477 {
1478         u64 interval_tm_unit;
1479         u64 tsf, result;
1480         unsigned long flags;
1481         struct ieee80211_conf *conf = NULL;
1482         u16 beacon_int = 0;
1483
1484         conf = ieee80211_get_hw_conf(priv->hw);
1485
1486         spin_lock_irqsave(&priv->lock, flags);
1487         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1488         priv->rxon_timing.timestamp.dw[0] =
1489                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1490
1491         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1492
1493         tsf = priv->timestamp;
1494
1495         beacon_int = priv->beacon_int;
1496         spin_unlock_irqrestore(&priv->lock, flags);
1497
1498         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1499                 if (beacon_int == 0) {
1500                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1501                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1502                 } else {
1503                         priv->rxon_timing.beacon_interval =
1504                                 cpu_to_le16(beacon_int);
1505                         priv->rxon_timing.beacon_interval =
1506                             iwl4965_adjust_beacon_interval(
1507                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1508                 }
1509
1510                 priv->rxon_timing.atim_window = 0;
1511         } else {
1512                 priv->rxon_timing.beacon_interval =
1513                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1514                 /* TODO: we need to get atim_window from upper stack
1515                  * for now we set to 0 */
1516                 priv->rxon_timing.atim_window = 0;
1517         }
1518
1519         interval_tm_unit =
1520                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1521         result = do_div(tsf, interval_tm_unit);
1522         priv->rxon_timing.beacon_init_val =
1523             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1524
1525         IWL_DEBUG_ASSOC
1526             ("beacon interval %d beacon timer %d beacon tim %d\n",
1527                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1528                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1529                 le16_to_cpu(priv->rxon_timing.atim_window));
1530 }
1531
1532 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1533 {
1534         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1535                 IWL_ERROR("APs don't scan.\n");
1536                 return 0;
1537         }
1538
1539         if (!iwl_is_ready_rf(priv)) {
1540                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1541                 return -EIO;
1542         }
1543
1544         if (test_bit(STATUS_SCANNING, &priv->status)) {
1545                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1546                 return -EAGAIN;
1547         }
1548
1549         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1550                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1551                                "Queuing.\n");
1552                 return -EAGAIN;
1553         }
1554
1555         IWL_DEBUG_INFO("Starting scan...\n");
1556         priv->scan_bands = 2;
1557         set_bit(STATUS_SCANNING, &priv->status);
1558         priv->scan_start = jiffies;
1559         priv->scan_pass_start = priv->scan_start;
1560
1561         queue_work(priv->workqueue, &priv->request_scan);
1562
1563         return 0;
1564 }
1565
1566
1567 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1568                                           enum ieee80211_band band)
1569 {
1570         if (band == IEEE80211_BAND_5GHZ) {
1571                 priv->staging_rxon.flags &=
1572                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1573                       | RXON_FLG_CCK_MSK);
1574                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1575         } else {
1576                 /* Copied from iwl4965_post_associate() */
1577                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1578                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1579                 else
1580                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1581
1582                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1583                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1584
1585                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1586                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1587                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1588         }
1589 }
1590
1591 /*
1592  * initialize rxon structure with default values from eeprom
1593  */
1594 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1595 {
1596         const struct iwl_channel_info *ch_info;
1597
1598         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1599
1600         switch (priv->iw_mode) {
1601         case IEEE80211_IF_TYPE_AP:
1602                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1603                 break;
1604
1605         case IEEE80211_IF_TYPE_STA:
1606                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1607                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1608                 break;
1609
1610         case IEEE80211_IF_TYPE_IBSS:
1611                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1612                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1613                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1614                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1615                 break;
1616
1617         case IEEE80211_IF_TYPE_MNTR:
1618                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1619                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1620                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1621                 break;
1622         default:
1623                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
1624                 break;
1625         }
1626
1627 #if 0
1628         /* TODO:  Figure out when short_preamble would be set and cache from
1629          * that */
1630         if (!hw_to_local(priv->hw)->short_preamble)
1631                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1632         else
1633                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1634 #endif
1635
1636         ch_info = iwl_get_channel_info(priv, priv->band,
1637                                        le16_to_cpu(priv->staging_rxon.channel));
1638
1639         if (!ch_info)
1640                 ch_info = &priv->channel_info[0];
1641
1642         /*
1643          * in some case A channels are all non IBSS
1644          * in this case force B/G channel
1645          */
1646         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
1647             !(is_channel_ibss(ch_info)))
1648                 ch_info = &priv->channel_info[0];
1649
1650         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1651         priv->band = ch_info->band;
1652
1653         iwl4965_set_flags_for_phymode(priv, priv->band);
1654
1655         priv->staging_rxon.ofdm_basic_rates =
1656             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1657         priv->staging_rxon.cck_basic_rates =
1658             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1659
1660         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1661                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1662         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1663         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1664         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1665         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1666         iwl4965_set_rxon_chain(priv);
1667 }
1668
1669 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
1670 {
1671         if (mode == IEEE80211_IF_TYPE_IBSS) {
1672                 const struct iwl_channel_info *ch_info;
1673
1674                 ch_info = iwl_get_channel_info(priv,
1675                         priv->band,
1676                         le16_to_cpu(priv->staging_rxon.channel));
1677
1678                 if (!ch_info || !is_channel_ibss(ch_info)) {
1679                         IWL_ERROR("channel %d not IBSS channel\n",
1680                                   le16_to_cpu(priv->staging_rxon.channel));
1681                         return -EINVAL;
1682                 }
1683         }
1684
1685         priv->iw_mode = mode;
1686
1687         iwl4965_connection_init_rx_config(priv);
1688         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1689
1690         iwlcore_clear_stations_table(priv);
1691
1692         /* dont commit rxon if rf-kill is on*/
1693         if (!iwl_is_ready_rf(priv))
1694                 return -EAGAIN;
1695
1696         cancel_delayed_work(&priv->scan_check);
1697         if (iwl4965_scan_cancel_timeout(priv, 100)) {
1698                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
1699                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1700                 return -EAGAIN;
1701         }
1702
1703         iwl4965_commit_rxon(priv);
1704
1705         return 0;
1706 }
1707
1708 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1709                                       struct ieee80211_tx_control *ctl,
1710                                       struct iwl_cmd *cmd,
1711                                       struct sk_buff *skb_frag,
1712                                       int sta_id)
1713 {
1714         struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
1715         struct iwl_wep_key *wepkey;
1716         int keyidx = 0;
1717
1718         BUG_ON(ctl->hw_key->hw_key_idx > 3);
1719
1720         switch (keyinfo->alg) {
1721         case ALG_CCMP:
1722                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
1723                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
1724                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1725                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
1726                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
1727                 break;
1728
1729         case ALG_TKIP:
1730                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
1731                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
1732                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
1733                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
1734                 break;
1735
1736         case ALG_WEP:
1737                 wepkey = &priv->wep_keys[ctl->hw_key->hw_key_idx];
1738                 cmd->cmd.tx.sec_ctl = 0;
1739                 if (priv->default_wep_key) {
1740                         /* the WEP key was sent as static */
1741                         keyidx = ctl->hw_key->hw_key_idx;
1742                         memcpy(&cmd->cmd.tx.key[3], wepkey->key,
1743                                                         wepkey->key_size);
1744                         if (wepkey->key_size == WEP_KEY_LEN_128)
1745                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1746                 } else {
1747                         /* the WEP key was sent as dynamic */
1748                         keyidx = keyinfo->keyidx;
1749                         memcpy(&cmd->cmd.tx.key[3], keyinfo->key,
1750                                                         keyinfo->keylen);
1751                         if (keyinfo->keylen == WEP_KEY_LEN_128)
1752                                 cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
1753                 }
1754
1755                 cmd->cmd.tx.sec_ctl |= (TX_CMD_SEC_WEP |
1756                         (keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
1757
1758                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1759                              "with key %d\n", keyidx);
1760                 break;
1761
1762         default:
1763                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
1764                 break;
1765         }
1766 }
1767
1768 /*
1769  * handle build REPLY_TX command notification.
1770  */
1771 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
1772                                   struct iwl_cmd *cmd,
1773                                   struct ieee80211_tx_control *ctrl,
1774                                   struct ieee80211_hdr *hdr,
1775                                   int is_unicast, u8 std_id)
1776 {
1777         __le16 *qc;
1778         u16 fc = le16_to_cpu(hdr->frame_control);
1779         __le32 tx_flags = cmd->cmd.tx.tx_flags;
1780
1781         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1782         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
1783                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1784                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
1785                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1786                 if (ieee80211_is_probe_response(fc) &&
1787                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1788                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1789         } else {
1790                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1791                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1792         }
1793
1794         if (ieee80211_is_back_request(fc))
1795                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
1796
1797
1798         cmd->cmd.tx.sta_id = std_id;
1799         if (ieee80211_get_morefrag(hdr))
1800                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1801
1802         qc = ieee80211_get_qos_ctrl(hdr);
1803         if (qc) {
1804                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
1805                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1806         } else
1807                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1808
1809         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
1810                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1811                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1812         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
1813                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1814                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1815         }
1816
1817         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1818                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1819
1820         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1821         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1822                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
1823                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
1824                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
1825                 else
1826                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
1827         } else {
1828                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
1829         }
1830
1831         cmd->cmd.tx.driver_txop = 0;
1832         cmd->cmd.tx.tx_flags = tx_flags;
1833         cmd->cmd.tx.next_frame_len = 0;
1834 }
1835 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
1836 {
1837         /* 0 - mgmt, 1 - cnt, 2 - data */
1838         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
1839         priv->tx_stats[idx].cnt++;
1840         priv->tx_stats[idx].bytes += len;
1841 }
1842 /**
1843  * iwl4965_get_sta_id - Find station's index within station table
1844  *
1845  * If new IBSS station, create new entry in station table
1846  */
1847 static int iwl4965_get_sta_id(struct iwl_priv *priv,
1848                                 struct ieee80211_hdr *hdr)
1849 {
1850         int sta_id;
1851         u16 fc = le16_to_cpu(hdr->frame_control);
1852         DECLARE_MAC_BUF(mac);
1853
1854         /* If this frame is broadcast or management, use broadcast station id */
1855         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1856             is_multicast_ether_addr(hdr->addr1))
1857                 return priv->hw_params.bcast_sta_id;
1858
1859         switch (priv->iw_mode) {
1860
1861         /* If we are a client station in a BSS network, use the special
1862          * AP station entry (that's the only station we communicate with) */
1863         case IEEE80211_IF_TYPE_STA:
1864                 return IWL_AP_ID;
1865
1866         /* If we are an AP, then find the station, or use BCAST */
1867         case IEEE80211_IF_TYPE_AP:
1868                 sta_id = iwl_find_station(priv, hdr->addr1);
1869                 if (sta_id != IWL_INVALID_STATION)
1870                         return sta_id;
1871                 return priv->hw_params.bcast_sta_id;
1872
1873         /* If this frame is going out to an IBSS network, find the station,
1874          * or create a new station table entry */
1875         case IEEE80211_IF_TYPE_IBSS:
1876                 sta_id = iwl_find_station(priv, hdr->addr1);
1877                 if (sta_id != IWL_INVALID_STATION)
1878                         return sta_id;
1879
1880                 /* Create new station table entry */
1881                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
1882                                                    0, CMD_ASYNC, NULL);
1883
1884                 if (sta_id != IWL_INVALID_STATION)
1885                         return sta_id;
1886
1887                 IWL_DEBUG_DROP("Station %s not in station map. "
1888                                "Defaulting to broadcast...\n",
1889                                print_mac(mac, hdr->addr1));
1890                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1891                 return priv->hw_params.bcast_sta_id;
1892
1893         default:
1894                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
1895                 return priv->hw_params.bcast_sta_id;
1896         }
1897 }
1898
1899 /*
1900  * start REPLY_TX command process
1901  */
1902 static int iwl4965_tx_skb(struct iwl_priv *priv,
1903                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
1904 {
1905         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1906         struct iwl4965_tfd_frame *tfd;
1907         u32 *control_flags;
1908         int txq_id = ctl->queue;
1909         struct iwl4965_tx_queue *txq = NULL;
1910         struct iwl4965_queue *q = NULL;
1911         dma_addr_t phys_addr;
1912         dma_addr_t txcmd_phys;
1913         dma_addr_t scratch_phys;
1914         struct iwl_cmd *out_cmd = NULL;
1915         u16 len, idx, len_org;
1916         u8 id, hdr_len, unicast;
1917         u8 sta_id;
1918         u16 seq_number = 0;
1919         u16 fc;
1920         __le16 *qc;
1921         u8 wait_write_ptr = 0;
1922         unsigned long flags;
1923         int rc;
1924
1925         spin_lock_irqsave(&priv->lock, flags);
1926         if (iwl_is_rfkill(priv)) {
1927                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
1928                 goto drop_unlock;
1929         }
1930
1931         if (!priv->vif) {
1932                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
1933                 goto drop_unlock;
1934         }
1935
1936         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
1937                 IWL_ERROR("ERROR: No TX rate available.\n");
1938                 goto drop_unlock;
1939         }
1940
1941         unicast = !is_multicast_ether_addr(hdr->addr1);
1942         id = 0;
1943
1944         fc = le16_to_cpu(hdr->frame_control);
1945
1946 #ifdef CONFIG_IWLWIFI_DEBUG
1947         if (ieee80211_is_auth(fc))
1948                 IWL_DEBUG_TX("Sending AUTH frame\n");
1949         else if (ieee80211_is_assoc_request(fc))
1950                 IWL_DEBUG_TX("Sending ASSOC frame\n");
1951         else if (ieee80211_is_reassoc_request(fc))
1952                 IWL_DEBUG_TX("Sending REASSOC frame\n");
1953 #endif
1954
1955         /* drop all data frame if we are not associated */
1956         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
1957            (!iwl_is_associated(priv) ||
1958             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
1959             !priv->assoc_station_added)) {
1960                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
1961                 goto drop_unlock;
1962         }
1963
1964         spin_unlock_irqrestore(&priv->lock, flags);
1965
1966         hdr_len = ieee80211_get_hdrlen(fc);
1967
1968         /* Find (or create) index into station table for destination station */
1969         sta_id = iwl4965_get_sta_id(priv, hdr);
1970         if (sta_id == IWL_INVALID_STATION) {
1971                 DECLARE_MAC_BUF(mac);
1972
1973                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
1974                                print_mac(mac, hdr->addr1));
1975                 goto drop;
1976         }
1977
1978         IWL_DEBUG_RATE("station Id %d\n", sta_id);
1979
1980         qc = ieee80211_get_qos_ctrl(hdr);
1981         if (qc) {
1982                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
1983                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
1984                                 IEEE80211_SCTL_SEQ;
1985                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
1986                         (hdr->seq_ctrl &
1987                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
1988                 seq_number += 0x10;
1989 #ifdef CONFIG_IWL4965_HT
1990                 /* aggregation is on for this <sta,tid> */
1991                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
1992                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
1993                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
1994 #endif /* CONFIG_IWL4965_HT */
1995         }
1996
1997         /* Descriptor for chosen Tx queue */
1998         txq = &priv->txq[txq_id];
1999         q = &txq->q;
2000
2001         spin_lock_irqsave(&priv->lock, flags);
2002
2003         /* Set up first empty TFD within this queue's circular TFD buffer */
2004         tfd = &txq->bd[q->write_ptr];
2005         memset(tfd, 0, sizeof(*tfd));
2006         control_flags = (u32 *) tfd;
2007         idx = get_cmd_index(q, q->write_ptr, 0);
2008
2009         /* Set up driver data for this TFD */
2010         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2011         txq->txb[q->write_ptr].skb[0] = skb;
2012         memcpy(&(txq->txb[q->write_ptr].status.control),
2013                ctl, sizeof(struct ieee80211_tx_control));
2014
2015         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2016         out_cmd = &txq->cmd[idx];
2017         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2018         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2019
2020         /*
2021          * Set up the Tx-command (not MAC!) header.
2022          * Store the chosen Tx queue and TFD index within the sequence field;
2023          * after Tx, uCode's Tx response will return this value so driver can
2024          * locate the frame within the tx queue and do post-tx processing.
2025          */
2026         out_cmd->hdr.cmd = REPLY_TX;
2027         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2028                                 INDEX_TO_SEQ(q->write_ptr)));
2029
2030         /* Copy MAC header from skb into command buffer */
2031         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2032
2033         /*
2034          * Use the first empty entry in this queue's command buffer array
2035          * to contain the Tx command and MAC header concatenated together
2036          * (payload data will be in another buffer).
2037          * Size of this varies, due to varying MAC header length.
2038          * If end is not dword aligned, we'll have 2 extra bytes at the end
2039          * of the MAC header (device reads on dword boundaries).
2040          * We'll tell device about this padding later.
2041          */
2042         len = priv->hw_params.tx_cmd_len +
2043                 sizeof(struct iwl_cmd_header) + hdr_len;
2044
2045         len_org = len;
2046         len = (len + 3) & ~3;
2047
2048         if (len_org != len)
2049                 len_org = 1;
2050         else
2051                 len_org = 0;
2052
2053         /* Physical address of this Tx command's header (not MAC header!),
2054          * within command buffer array. */
2055         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2056                      offsetof(struct iwl_cmd, hdr);
2057
2058         /* Add buffer containing Tx command and MAC(!) header to TFD's
2059          * first entry */
2060         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2061
2062         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2063                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2064
2065         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2066          * if any (802.11 null frames have no payload). */
2067         len = skb->len - hdr_len;
2068         if (len) {
2069                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2070                                            len, PCI_DMA_TODEVICE);
2071                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2072         }
2073
2074         /* Tell 4965 about any 2-byte padding after MAC header */
2075         if (len_org)
2076                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2077
2078         /* Total # bytes to be transmitted */
2079         len = (u16)skb->len;
2080         out_cmd->cmd.tx.len = cpu_to_le16(len);
2081
2082         /* TODO need this for burst mode later on */
2083         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2084
2085         /* set is_hcca to 0; it probably will never be implemented */
2086         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2087
2088         iwl_update_tx_stats(priv, fc, len);
2089
2090         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2091                 offsetof(struct iwl4965_tx_cmd, scratch);
2092         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2093         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2094
2095         if (!ieee80211_get_morefrag(hdr)) {
2096                 txq->need_update = 1;
2097                 if (qc) {
2098                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2099                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2100                 }
2101         } else {
2102                 wait_write_ptr = 1;
2103                 txq->need_update = 0;
2104         }
2105
2106         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2107                            sizeof(out_cmd->cmd.tx));
2108
2109         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2110                            ieee80211_get_hdrlen(fc));
2111
2112         /* Set up entry for this TFD in Tx byte-count array */
2113         priv->cfg->ops->lib->txq_update_byte_cnt_tbl(priv, txq, len);
2114
2115         /* Tell device the write index *just past* this latest filled TFD */
2116         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2117         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2118         spin_unlock_irqrestore(&priv->lock, flags);
2119
2120         if (rc)
2121                 return rc;
2122
2123         if ((iwl4965_queue_space(q) < q->high_mark)
2124             && priv->mac80211_registered) {
2125                 if (wait_write_ptr) {
2126                         spin_lock_irqsave(&priv->lock, flags);
2127                         txq->need_update = 1;
2128                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2129                         spin_unlock_irqrestore(&priv->lock, flags);
2130                 }
2131
2132                 ieee80211_stop_queue(priv->hw, ctl->queue);
2133         }
2134
2135         return 0;
2136
2137 drop_unlock:
2138         spin_unlock_irqrestore(&priv->lock, flags);
2139 drop:
2140         return -1;
2141 }
2142
2143 static void iwl4965_set_rate(struct iwl_priv *priv)
2144 {
2145         const struct ieee80211_supported_band *hw = NULL;
2146         struct ieee80211_rate *rate;
2147         int i;
2148
2149         hw = iwl4965_get_hw_mode(priv, priv->band);
2150         if (!hw) {
2151                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2152                 return;
2153         }
2154
2155         priv->active_rate = 0;
2156         priv->active_rate_basic = 0;
2157
2158         for (i = 0; i < hw->n_bitrates; i++) {
2159                 rate = &(hw->bitrates[i]);
2160                 if (rate->hw_value < IWL_RATE_COUNT)
2161                         priv->active_rate |= (1 << rate->hw_value);
2162         }
2163
2164         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2165                        priv->active_rate, priv->active_rate_basic);
2166
2167         /*
2168          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2169          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2170          * OFDM
2171          */
2172         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2173                 priv->staging_rxon.cck_basic_rates =
2174                     ((priv->active_rate_basic &
2175                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2176         else
2177                 priv->staging_rxon.cck_basic_rates =
2178                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2179
2180         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2181                 priv->staging_rxon.ofdm_basic_rates =
2182                     ((priv->active_rate_basic &
2183                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2184                       IWL_FIRST_OFDM_RATE) & 0xFF;
2185         else
2186                 priv->staging_rxon.ofdm_basic_rates =
2187                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2188 }
2189
2190 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2191 {
2192         unsigned long flags;
2193
2194         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2195                 return;
2196
2197         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2198                           disable_radio ? "OFF" : "ON");
2199
2200         if (disable_radio) {
2201                 iwl4965_scan_cancel(priv);
2202                 /* FIXME: This is a workaround for AP */
2203                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2204                         spin_lock_irqsave(&priv->lock, flags);
2205                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2206                                     CSR_UCODE_SW_BIT_RFKILL);
2207                         spin_unlock_irqrestore(&priv->lock, flags);
2208                         /* call the host command only if no hw rf-kill set */
2209                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
2210                             iwl_is_ready(priv))
2211                                 iwl4965_send_card_state(priv,
2212                                                         CARD_STATE_CMD_DISABLE,
2213                                                         0);
2214                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2215
2216                         /* make sure mac80211 stop sending Tx frame */
2217                         if (priv->mac80211_registered)
2218                                 ieee80211_stop_queues(priv->hw);
2219                 }
2220                 return;
2221         }
2222
2223         spin_lock_irqsave(&priv->lock, flags);
2224         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2225
2226         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2227         spin_unlock_irqrestore(&priv->lock, flags);
2228
2229         /* wake up ucode */
2230         msleep(10);
2231
2232         spin_lock_irqsave(&priv->lock, flags);
2233         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2234         if (!iwl_grab_nic_access(priv))
2235                 iwl_release_nic_access(priv);
2236         spin_unlock_irqrestore(&priv->lock, flags);
2237
2238         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2239                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2240                                   "disabled by HW switch\n");
2241                 return;
2242         }
2243
2244         queue_work(priv->workqueue, &priv->restart);
2245         return;
2246 }
2247
2248 #define IWL_PACKET_RETRY_TIME HZ
2249
2250 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2251 {
2252         u16 sc = le16_to_cpu(header->seq_ctrl);
2253         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2254         u16 frag = sc & IEEE80211_SCTL_FRAG;
2255         u16 *last_seq, *last_frag;
2256         unsigned long *last_time;
2257
2258         switch (priv->iw_mode) {
2259         case IEEE80211_IF_TYPE_IBSS:{
2260                 struct list_head *p;
2261                 struct iwl4965_ibss_seq *entry = NULL;
2262                 u8 *mac = header->addr2;
2263                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2264
2265                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2266                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2267                         if (!compare_ether_addr(entry->mac, mac))
2268                                 break;
2269                 }
2270                 if (p == &priv->ibss_mac_hash[index]) {
2271                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2272                         if (!entry) {
2273                                 IWL_ERROR("Cannot malloc new mac entry\n");
2274                                 return 0;
2275                         }
2276                         memcpy(entry->mac, mac, ETH_ALEN);
2277                         entry->seq_num = seq;
2278                         entry->frag_num = frag;
2279                         entry->packet_time = jiffies;
2280                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2281                         return 0;
2282                 }
2283                 last_seq = &entry->seq_num;
2284                 last_frag = &entry->frag_num;
2285                 last_time = &entry->packet_time;
2286                 break;
2287         }
2288         case IEEE80211_IF_TYPE_STA:
2289                 last_seq = &priv->last_seq_num;
2290                 last_frag = &priv->last_frag_num;
2291                 last_time = &priv->last_packet_time;
2292                 break;
2293         default:
2294                 return 0;
2295         }
2296         if ((*last_seq == seq) &&
2297             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2298                 if (*last_frag == frag)
2299                         goto drop;
2300                 if (*last_frag + 1 != frag)
2301                         /* out-of-order fragment */
2302                         goto drop;
2303         } else
2304                 *last_seq = seq;
2305
2306         *last_frag = frag;
2307         *last_time = jiffies;
2308         return 0;
2309
2310  drop:
2311         return 1;
2312 }
2313
2314 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2315
2316 #include "iwl-spectrum.h"
2317
2318 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2319 #define BEACON_TIME_MASK_HIGH   0xFF000000
2320 #define TIME_UNIT               1024
2321
2322 /*
2323  * extended beacon time format
2324  * time in usec will be changed into a 32-bit value in 8:24 format
2325  * the high 1 byte is the beacon counts
2326  * the lower 3 bytes is the time in usec within one beacon interval
2327  */
2328
2329 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2330 {
2331         u32 quot;
2332         u32 rem;
2333         u32 interval = beacon_interval * 1024;
2334
2335         if (!interval || !usec)
2336                 return 0;
2337
2338         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2339         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2340
2341         return (quot << 24) + rem;
2342 }
2343
2344 /* base is usually what we get from ucode with each received frame,
2345  * the same as HW timer counter counting down
2346  */
2347
2348 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2349 {
2350         u32 base_low = base & BEACON_TIME_MASK_LOW;
2351         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2352         u32 interval = beacon_interval * TIME_UNIT;
2353         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2354             (addon & BEACON_TIME_MASK_HIGH);
2355
2356         if (base_low > addon_low)
2357                 res += base_low - addon_low;
2358         else if (base_low < addon_low) {
2359                 res += interval + base_low - addon_low;
2360                 res += (1 << 24);
2361         } else
2362                 res += (1 << 24);
2363
2364         return cpu_to_le32(res);
2365 }
2366
2367 static int iwl4965_get_measurement(struct iwl_priv *priv,
2368                                struct ieee80211_measurement_params *params,
2369                                u8 type)
2370 {
2371         struct iwl4965_spectrum_cmd spectrum;
2372         struct iwl4965_rx_packet *res;
2373         struct iwl_host_cmd cmd = {
2374                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2375                 .data = (void *)&spectrum,
2376                 .meta.flags = CMD_WANT_SKB,
2377         };
2378         u32 add_time = le64_to_cpu(params->start_time);
2379         int rc;
2380         int spectrum_resp_status;
2381         int duration = le16_to_cpu(params->duration);
2382
2383         if (iwl_is_associated(priv))
2384                 add_time =
2385                     iwl4965_usecs_to_beacons(
2386                         le64_to_cpu(params->start_time) - priv->last_tsf,
2387                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2388
2389         memset(&spectrum, 0, sizeof(spectrum));
2390
2391         spectrum.channel_count = cpu_to_le16(1);
2392         spectrum.flags =
2393             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2394         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2395         cmd.len = sizeof(spectrum);
2396         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2397
2398         if (iwl_is_associated(priv))
2399                 spectrum.start_time =
2400                     iwl4965_add_beacon_time(priv->last_beacon_time,
2401                                 add_time,
2402                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2403         else
2404                 spectrum.start_time = 0;
2405
2406         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2407         spectrum.channels[0].channel = params->channel;
2408         spectrum.channels[0].type = type;
2409         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2410                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2411                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2412
2413         rc = iwl_send_cmd_sync(priv, &cmd);
2414         if (rc)
2415                 return rc;
2416
2417         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2418         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2419                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2420                 rc = -EIO;
2421         }
2422
2423         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2424         switch (spectrum_resp_status) {
2425         case 0:         /* Command will be handled */
2426                 if (res->u.spectrum.id != 0xff) {
2427                         IWL_DEBUG_INFO
2428                             ("Replaced existing measurement: %d\n",
2429                              res->u.spectrum.id);
2430                         priv->measurement_status &= ~MEASUREMENT_READY;
2431                 }
2432                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2433                 rc = 0;
2434                 break;
2435
2436         case 1:         /* Command will not be handled */
2437                 rc = -EAGAIN;
2438                 break;
2439         }
2440
2441         dev_kfree_skb_any(cmd.meta.u.skb);
2442
2443         return rc;
2444 }
2445 #endif
2446
2447 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2448                                  struct iwl4965_tx_info *tx_sta)
2449 {
2450
2451         tx_sta->status.ack_signal = 0;
2452         tx_sta->status.excessive_retries = 0;
2453         tx_sta->status.queue_length = 0;
2454         tx_sta->status.queue_number = 0;
2455
2456         if (in_interrupt())
2457                 ieee80211_tx_status_irqsafe(priv->hw,
2458                                             tx_sta->skb[0], &(tx_sta->status));
2459         else
2460                 ieee80211_tx_status(priv->hw,
2461                                     tx_sta->skb[0], &(tx_sta->status));
2462
2463         tx_sta->skb[0] = NULL;
2464 }
2465
2466 /**
2467  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2468  *
2469  * When FW advances 'R' index, all entries between old and new 'R' index
2470  * need to be reclaimed. As result, some free space forms.  If there is
2471  * enough free space (> low mark), wake the stack that feeds us.
2472  */
2473 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2474 {
2475         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2476         struct iwl4965_queue *q = &txq->q;
2477         int nfreed = 0;
2478
2479         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2480                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2481                           "is out of range [0-%d] %d %d.\n", txq_id,
2482                           index, q->n_bd, q->write_ptr, q->read_ptr);
2483                 return 0;
2484         }
2485
2486         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2487                 q->read_ptr != index;
2488                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2489                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2490                         iwl4965_txstatus_to_ieee(priv,
2491                                         &(txq->txb[txq->q.read_ptr]));
2492                         iwl4965_hw_txq_free_tfd(priv, txq);
2493                 } else if (nfreed > 1) {
2494                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2495                                         q->write_ptr, q->read_ptr);
2496                         queue_work(priv->workqueue, &priv->restart);
2497                 }
2498                 nfreed++;
2499         }
2500
2501 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2502                         (txq_id != IWL_CMD_QUEUE_NUM) &&
2503                         priv->mac80211_registered)
2504                 ieee80211_wake_queue(priv->hw, txq_id); */
2505
2506
2507         return nfreed;
2508 }
2509
2510 static int iwl4965_is_tx_success(u32 status)
2511 {
2512         status &= TX_STATUS_MSK;
2513         return (status == TX_STATUS_SUCCESS)
2514             || (status == TX_STATUS_DIRECT_DONE);
2515 }
2516
2517 /******************************************************************************
2518  *
2519  * Generic RX handler implementations
2520  *
2521  ******************************************************************************/
2522 #ifdef CONFIG_IWL4965_HT
2523
2524 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2525                                     struct ieee80211_hdr *hdr)
2526 {
2527         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2528                 return IWL_AP_ID;
2529         else {
2530                 u8 *da = ieee80211_get_DA(hdr);
2531                 return iwl_find_station(priv, da);
2532         }
2533 }
2534
2535 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2536         struct iwl_priv *priv, int txq_id, int idx)
2537 {
2538         if (priv->txq[txq_id].txb[idx].skb[0])
2539                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2540                                 txb[idx].skb[0]->data;
2541         return NULL;
2542 }
2543
2544 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2545 {
2546         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2547                                 tx_resp->frame_count);
2548         return le32_to_cpu(*scd_ssn) & MAX_SN;
2549
2550 }
2551
2552 /**
2553  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2554  */
2555 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2556                                       struct iwl4965_ht_agg *agg,
2557                                       struct iwl4965_tx_resp_agg *tx_resp,
2558                                       u16 start_idx)
2559 {
2560         u16 status;
2561         struct agg_tx_status *frame_status = &tx_resp->status;
2562         struct ieee80211_tx_status *tx_status = NULL;
2563         struct ieee80211_hdr *hdr = NULL;
2564         int i, sh;
2565         int txq_id, idx;
2566         u16 seq;
2567
2568         if (agg->wait_for_ba)
2569                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2570
2571         agg->frame_count = tx_resp->frame_count;
2572         agg->start_idx = start_idx;
2573         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2574         agg->bitmap = 0;
2575
2576         /* # frames attempted by Tx command */
2577         if (agg->frame_count == 1) {
2578                 /* Only one frame was attempted; no block-ack will arrive */
2579                 status = le16_to_cpu(frame_status[0].status);
2580                 seq  = le16_to_cpu(frame_status[0].sequence);
2581                 idx = SEQ_TO_INDEX(seq);
2582                 txq_id = SEQ_TO_QUEUE(seq);
2583
2584                 /* FIXME: code repetition */
2585                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
2586                                    agg->frame_count, agg->start_idx, idx);
2587
2588                 tx_status = &(priv->txq[txq_id].txb[idx].status);
2589                 tx_status->retry_count = tx_resp->failure_frame;
2590                 tx_status->queue_number = status & 0xff;
2591                 tx_status->queue_length = tx_resp->failure_rts;
2592                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
2593                 tx_status->flags = iwl4965_is_tx_success(status)?
2594                         IEEE80211_TX_STATUS_ACK : 0;
2595                 iwl4965_hwrate_to_tx_control(priv,
2596                                              le32_to_cpu(tx_resp->rate_n_flags),
2597                                              &tx_status->control);
2598                 /* FIXME: code repetition end */
2599
2600                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
2601                                     status & 0xff, tx_resp->failure_frame);
2602                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
2603                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
2604
2605                 agg->wait_for_ba = 0;
2606         } else {
2607                 /* Two or more frames were attempted; expect block-ack */
2608                 u64 bitmap = 0;
2609                 int start = agg->start_idx;
2610
2611                 /* Construct bit-map of pending frames within Tx window */
2612                 for (i = 0; i < agg->frame_count; i++) {
2613                         u16 sc;
2614                         status = le16_to_cpu(frame_status[i].status);
2615                         seq  = le16_to_cpu(frame_status[i].sequence);
2616                         idx = SEQ_TO_INDEX(seq);
2617                         txq_id = SEQ_TO_QUEUE(seq);
2618
2619                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
2620                                       AGG_TX_STATE_ABORT_MSK))
2621                                 continue;
2622
2623                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
2624                                            agg->frame_count, txq_id, idx);
2625
2626                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
2627
2628                         sc = le16_to_cpu(hdr->seq_ctrl);
2629                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
2630                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
2631                                           " idx=%d, seq_idx=%d, seq=%d\n",
2632                                           idx, SEQ_TO_SN(sc),
2633                                           hdr->seq_ctrl);
2634                                 return -1;
2635                         }
2636
2637                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
2638                                            i, idx, SEQ_TO_SN(sc));
2639
2640                         sh = idx - start;
2641                         if (sh > 64) {
2642                                 sh = (start - idx) + 0xff;
2643                                 bitmap = bitmap << sh;
2644                                 sh = 0;
2645                                 start = idx;
2646                         } else if (sh < -64)
2647                                 sh  = 0xff - (start - idx);
2648                         else if (sh < 0) {
2649                                 sh = start - idx;
2650                                 start = idx;
2651                                 bitmap = bitmap << sh;
2652                                 sh = 0;
2653                         }
2654                         bitmap |= (1 << sh);
2655                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
2656                                            start, (u32)(bitmap & 0xFFFFFFFF));
2657                 }
2658
2659                 agg->bitmap = bitmap;
2660                 agg->start_idx = start;
2661                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2662                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
2663                                    agg->frame_count, agg->start_idx,
2664                                    (unsigned long long)agg->bitmap);
2665
2666                 if (bitmap)
2667                         agg->wait_for_ba = 1;
2668         }
2669         return 0;
2670 }
2671 #endif
2672
2673 /**
2674  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
2675  */
2676 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
2677                             struct iwl4965_rx_mem_buffer *rxb)
2678 {
2679         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2680         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2681         int txq_id = SEQ_TO_QUEUE(sequence);
2682         int index = SEQ_TO_INDEX(sequence);
2683         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2684         struct ieee80211_tx_status *tx_status;
2685         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
2686         u32  status = le32_to_cpu(tx_resp->status);
2687 #ifdef CONFIG_IWL4965_HT
2688         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
2689         struct ieee80211_hdr *hdr;
2690         __le16 *qc;
2691 #endif
2692
2693         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
2694                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
2695                           "is out of range [0-%d] %d %d\n", txq_id,
2696                           index, txq->q.n_bd, txq->q.write_ptr,
2697                           txq->q.read_ptr);
2698                 return;
2699         }
2700
2701 #ifdef CONFIG_IWL4965_HT
2702         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
2703         qc = ieee80211_get_qos_ctrl(hdr);
2704
2705         if (qc)
2706                 tid = le16_to_cpu(*qc) & 0xf;
2707
2708         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
2709         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
2710                 IWL_ERROR("Station not known\n");
2711                 return;
2712         }
2713
2714         if (txq->sched_retry) {
2715                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
2716                 struct iwl4965_ht_agg *agg = NULL;
2717
2718                 if (!qc)
2719                         return;
2720
2721                 agg = &priv->stations[sta_id].tid[tid].agg;
2722
2723                 iwl4965_tx_status_reply_tx(priv, agg,
2724                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
2725
2726                 if ((tx_resp->frame_count == 1) &&
2727                     !iwl4965_is_tx_success(status)) {
2728                         /* TODO: send BAR */
2729                 }
2730
2731                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
2732                         int freed;
2733                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
2734                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
2735                                            "%d index %d\n", scd_ssn , index);
2736                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2737                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2738
2739                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2740                             txq_id >= 0 && priv->mac80211_registered &&
2741                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2742                                 ieee80211_wake_queue(priv->hw, txq_id);
2743
2744                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2745                 }
2746         } else {
2747 #endif /* CONFIG_IWL4965_HT */
2748         tx_status = &(txq->txb[txq->q.read_ptr].status);
2749
2750         tx_status->retry_count = tx_resp->failure_frame;
2751         tx_status->queue_number = status;
2752         tx_status->queue_length = tx_resp->bt_kill_count;
2753         tx_status->queue_length |= tx_resp->failure_rts;
2754         tx_status->flags =
2755             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
2756         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
2757                                      &tx_status->control);
2758
2759         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
2760                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
2761                      status, le32_to_cpu(tx_resp->rate_n_flags),
2762                      tx_resp->failure_frame);
2763
2764         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
2765         if (index != -1) {
2766                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
2767 #ifdef CONFIG_IWL4965_HT
2768                 if (tid != MAX_TID_COUNT)
2769                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
2770                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
2771                         (txq_id >= 0) &&
2772                         priv->mac80211_registered)
2773                         ieee80211_wake_queue(priv->hw, txq_id);
2774                 if (tid != MAX_TID_COUNT)
2775                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
2776 #endif
2777         }
2778 #ifdef CONFIG_IWL4965_HT
2779         }
2780 #endif /* CONFIG_IWL4965_HT */
2781
2782         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
2783                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
2784 }
2785
2786
2787 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
2788                                struct iwl4965_rx_mem_buffer *rxb)
2789 {
2790         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2791         struct iwl4965_alive_resp *palive;
2792         struct delayed_work *pwork;
2793
2794         palive = &pkt->u.alive_frame;
2795
2796         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2797                        "0x%01X 0x%01X\n",
2798                        palive->is_valid, palive->ver_type,
2799                        palive->ver_subtype);
2800
2801         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2802                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2803                 memcpy(&priv->card_alive_init,
2804                        &pkt->u.alive_frame,
2805                        sizeof(struct iwl4965_init_alive_resp));
2806                 pwork = &priv->init_alive_start;
2807         } else {
2808                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2809                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2810                        sizeof(struct iwl4965_alive_resp));
2811                 pwork = &priv->alive_start;
2812         }
2813
2814         /* We delay the ALIVE response by 5ms to
2815          * give the HW RF Kill time to activate... */
2816         if (palive->is_valid == UCODE_VALID_OK)
2817                 queue_delayed_work(priv->workqueue, pwork,
2818                                    msecs_to_jiffies(5));
2819         else
2820                 IWL_WARNING("uCode did not respond OK.\n");
2821 }
2822
2823 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
2824                                  struct iwl4965_rx_mem_buffer *rxb)
2825 {
2826         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2827
2828         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2829         return;
2830 }
2831
2832 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
2833                                struct iwl4965_rx_mem_buffer *rxb)
2834 {
2835         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2836
2837         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2838                 "seq 0x%04X ser 0x%08X\n",
2839                 le32_to_cpu(pkt->u.err_resp.error_type),
2840                 get_cmd_string(pkt->u.err_resp.cmd_id),
2841                 pkt->u.err_resp.cmd_id,
2842                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2843                 le32_to_cpu(pkt->u.err_resp.error_info));
2844 }
2845
2846 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2847
2848 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
2849 {
2850         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2851         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
2852         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
2853         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2854                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2855         rxon->channel = csa->channel;
2856         priv->staging_rxon.channel = csa->channel;
2857 }
2858
2859 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
2860                                           struct iwl4965_rx_mem_buffer *rxb)
2861 {
2862 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2863         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2864         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
2865
2866         if (!report->state) {
2867                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2868                           "Spectrum Measure Notification: Start\n");
2869                 return;
2870         }
2871
2872         memcpy(&priv->measure_report, report, sizeof(*report));
2873         priv->measurement_status |= MEASUREMENT_READY;
2874 #endif
2875 }
2876
2877 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
2878                                   struct iwl4965_rx_mem_buffer *rxb)
2879 {
2880 #ifdef CONFIG_IWLWIFI_DEBUG
2881         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2882         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
2883         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2884                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2885 #endif
2886 }
2887
2888 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2889                                              struct iwl4965_rx_mem_buffer *rxb)
2890 {
2891         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2892         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2893                         "notification for %s:\n",
2894                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2895         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2896 }
2897
2898 static void iwl4965_bg_beacon_update(struct work_struct *work)
2899 {
2900         struct iwl_priv *priv =
2901                 container_of(work, struct iwl_priv, beacon_update);
2902         struct sk_buff *beacon;
2903
2904         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2905         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
2906
2907         if (!beacon) {
2908                 IWL_ERROR("update beacon failed\n");
2909                 return;
2910         }
2911
2912         mutex_lock(&priv->mutex);
2913         /* new beacon skb is allocated every time; dispose previous.*/
2914         if (priv->ibss_beacon)
2915                 dev_kfree_skb(priv->ibss_beacon);
2916
2917         priv->ibss_beacon = beacon;
2918         mutex_unlock(&priv->mutex);
2919
2920         iwl4965_send_beacon_cmd(priv);
2921 }
2922
2923 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
2924                                 struct iwl4965_rx_mem_buffer *rxb)
2925 {
2926 #ifdef CONFIG_IWLWIFI_DEBUG
2927         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2928         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
2929         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
2930
2931         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
2932                 "tsf %d %d rate %d\n",
2933                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
2934                 beacon->beacon_notify_hdr.failure_frame,
2935                 le32_to_cpu(beacon->ibss_mgr_status),
2936                 le32_to_cpu(beacon->high_tsf),
2937                 le32_to_cpu(beacon->low_tsf), rate);
2938 #endif
2939
2940         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
2941             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
2942                 queue_work(priv->workqueue, &priv->beacon_update);
2943 }
2944
2945 /* Service response to REPLY_SCAN_CMD (0x80) */
2946 static void iwl4965_rx_reply_scan(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_scanreq_notification *notif =
2952             (struct iwl4965_scanreq_notification *)pkt->u.raw;
2953
2954         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
2955 #endif
2956 }
2957
2958 /* Service SCAN_START_NOTIFICATION (0x82) */
2959 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
2960                                     struct iwl4965_rx_mem_buffer *rxb)
2961 {
2962         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2963         struct iwl4965_scanstart_notification *notif =
2964             (struct iwl4965_scanstart_notification *)pkt->u.raw;
2965         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
2966         IWL_DEBUG_SCAN("Scan start: "
2967                        "%d [802.11%s] "
2968                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
2969                        notif->channel,
2970                        notif->band ? "bg" : "a",
2971                        notif->tsf_high,
2972                        notif->tsf_low, notif->status, notif->beacon_timer);
2973 }
2974
2975 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
2976 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
2977                                       struct iwl4965_rx_mem_buffer *rxb)
2978 {
2979         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
2980         struct iwl4965_scanresults_notification *notif =
2981             (struct iwl4965_scanresults_notification *)pkt->u.raw;
2982
2983         IWL_DEBUG_SCAN("Scan ch.res: "
2984                        "%d [802.11%s] "
2985                        "(TSF: 0x%08X:%08X) - %d "
2986                        "elapsed=%lu usec (%dms since last)\n",
2987                        notif->channel,
2988                        notif->band ? "bg" : "a",
2989                        le32_to_cpu(notif->tsf_high),
2990                        le32_to_cpu(notif->tsf_low),
2991                        le32_to_cpu(notif->statistics[0]),
2992                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
2993                        jiffies_to_msecs(elapsed_jiffies
2994                                         (priv->last_scan_jiffies, jiffies)));
2995
2996         priv->last_scan_jiffies = jiffies;
2997         priv->next_scan_jiffies = 0;
2998 }
2999
3000 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3001 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3002                                        struct iwl4965_rx_mem_buffer *rxb)
3003 {
3004         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3005         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3006
3007         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3008                        scan_notif->scanned_channels,
3009                        scan_notif->tsf_low,
3010                        scan_notif->tsf_high, scan_notif->status);
3011
3012         /* The HW is no longer scanning */
3013         clear_bit(STATUS_SCAN_HW, &priv->status);
3014
3015         /* The scan completion notification came in, so kill that timer... */
3016         cancel_delayed_work(&priv->scan_check);
3017
3018         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3019                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3020                        jiffies_to_msecs(elapsed_jiffies
3021                                         (priv->scan_pass_start, jiffies)));
3022
3023         /* Remove this scanned band from the list
3024          * of pending bands to scan */
3025         priv->scan_bands--;
3026
3027         /* If a request to abort was given, or the scan did not succeed
3028          * then we reset the scan state machine and terminate,
3029          * re-queuing another scan if one has been requested */
3030         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3031                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3032                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3033         } else {
3034                 /* If there are more bands on this scan pass reschedule */
3035                 if (priv->scan_bands > 0)
3036                         goto reschedule;
3037         }
3038
3039         priv->last_scan_jiffies = jiffies;
3040         priv->next_scan_jiffies = 0;
3041         IWL_DEBUG_INFO("Setting scan to off\n");
3042
3043         clear_bit(STATUS_SCANNING, &priv->status);
3044
3045         IWL_DEBUG_INFO("Scan took %dms\n",
3046                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3047
3048         queue_work(priv->workqueue, &priv->scan_completed);
3049
3050         return;
3051
3052 reschedule:
3053         priv->scan_pass_start = jiffies;
3054         queue_work(priv->workqueue, &priv->request_scan);
3055 }
3056
3057 /* Handle notification from uCode that card's power state is changing
3058  * due to software, hardware, or critical temperature RFKILL */
3059 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3060                                     struct iwl4965_rx_mem_buffer *rxb)
3061 {
3062         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3063         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3064         unsigned long status = priv->status;
3065
3066         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3067                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3068                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3069
3070         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3071                      RF_CARD_DISABLED)) {
3072
3073                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3074                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3075
3076                 if (!iwl_grab_nic_access(priv)) {
3077                         iwl_write_direct32(
3078                                 priv, HBUS_TARG_MBX_C,
3079                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3080
3081                         iwl_release_nic_access(priv);
3082                 }
3083
3084                 if (!(flags & RXON_CARD_DISABLED)) {
3085                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3086                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3087                         if (!iwl_grab_nic_access(priv)) {
3088                                 iwl_write_direct32(
3089                                         priv, HBUS_TARG_MBX_C,
3090                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3091
3092                                 iwl_release_nic_access(priv);
3093                         }
3094                 }
3095
3096                 if (flags & RF_CARD_DISABLED) {
3097                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3098                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3099                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3100                         if (!iwl_grab_nic_access(priv))
3101                                 iwl_release_nic_access(priv);
3102                 }
3103         }
3104
3105         if (flags & HW_CARD_DISABLED)
3106                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3107         else
3108                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3109
3110
3111         if (flags & SW_CARD_DISABLED)
3112                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3113         else
3114                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3115
3116         if (!(flags & RXON_CARD_DISABLED))
3117                 iwl4965_scan_cancel(priv);
3118
3119         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3120              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3121             (test_bit(STATUS_RF_KILL_SW, &status) !=
3122              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3123                 queue_work(priv->workqueue, &priv->rf_kill);
3124         else
3125                 wake_up_interruptible(&priv->wait_command_queue);
3126 }
3127
3128 /**
3129  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3130  *
3131  * Setup the RX handlers for each of the reply types sent from the uCode
3132  * to the host.
3133  *
3134  * This function chains into the hardware specific files for them to setup
3135  * any hardware specific handlers as well.
3136  */
3137 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3138 {
3139         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3140         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3141         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3142         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3143         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3144             iwl4965_rx_spectrum_measure_notif;
3145         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3146         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3147             iwl4965_rx_pm_debug_statistics_notif;
3148         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3149
3150         /*
3151          * The same handler is used for both the REPLY to a discrete
3152          * statistics request from the host as well as for the periodic
3153          * statistics notifications (after received beacons) from the uCode.
3154          */
3155         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3156         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3157
3158         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3159         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3160         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3161             iwl4965_rx_scan_results_notif;
3162         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3163             iwl4965_rx_scan_complete_notif;
3164         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3165         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3166
3167         /* Set up hardware specific Rx handlers */
3168         iwl4965_hw_rx_handler_setup(priv);
3169 }
3170
3171 /**
3172  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3173  * @rxb: Rx buffer to reclaim
3174  *
3175  * If an Rx buffer has an async callback associated with it the callback
3176  * will be executed.  The attached skb (if present) will only be freed
3177  * if the callback returns 1
3178  */
3179 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3180                                 struct iwl4965_rx_mem_buffer *rxb)
3181 {
3182         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3183         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3184         int txq_id = SEQ_TO_QUEUE(sequence);
3185         int index = SEQ_TO_INDEX(sequence);
3186         int huge = sequence & SEQ_HUGE_FRAME;
3187         int cmd_index;
3188         struct iwl_cmd *cmd;
3189
3190         /* If a Tx command is being handled and it isn't in the actual
3191          * command queue then there a command routing bug has been introduced
3192          * in the queue management code. */
3193         if (txq_id != IWL_CMD_QUEUE_NUM)
3194                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3195                           txq_id, pkt->hdr.cmd);
3196         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3197
3198         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3199         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3200
3201         /* Input error checking is done when commands are added to queue. */
3202         if (cmd->meta.flags & CMD_WANT_SKB) {
3203                 cmd->meta.source->u.skb = rxb->skb;
3204                 rxb->skb = NULL;
3205         } else if (cmd->meta.u.callback &&
3206                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3207                 rxb->skb = NULL;
3208
3209         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3210
3211         if (!(cmd->meta.flags & CMD_ASYNC)) {
3212                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3213                 wake_up_interruptible(&priv->wait_command_queue);
3214         }
3215 }
3216
3217 /************************** RX-FUNCTIONS ****************************/
3218 /*
3219  * Rx theory of operation
3220  *
3221  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3222  * each of which point to Receive Buffers to be filled by 4965.  These get
3223  * used not only for Rx frames, but for any command response or notification
3224  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3225  * of indexes into the circular buffer.
3226  *
3227  * Rx Queue Indexes
3228  * The host/firmware share two index registers for managing the Rx buffers.
3229  *
3230  * The READ index maps to the first position that the firmware may be writing
3231  * to -- the driver can read up to (but not including) this position and get
3232  * good data.
3233  * The READ index is managed by the firmware once the card is enabled.
3234  *
3235  * The WRITE index maps to the last position the driver has read from -- the
3236  * position preceding WRITE is the last slot the firmware can place a packet.
3237  *
3238  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3239  * WRITE = READ.
3240  *
3241  * During initialization, the host sets up the READ queue position to the first
3242  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3243  *
3244  * When the firmware places a packet in a buffer, it will advance the READ index
3245  * and fire the RX interrupt.  The driver can then query the READ index and
3246  * process as many packets as possible, moving the WRITE index forward as it
3247  * resets the Rx queue buffers with new memory.
3248  *
3249  * The management in the driver is as follows:
3250  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3251  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3252  *   to replenish the iwl->rxq->rx_free.
3253  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3254  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3255  *   'processed' and 'read' driver indexes as well)
3256  * + A received packet is processed and handed to the kernel network stack,
3257  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3258  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3259  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3260  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3261  *   were enough free buffers and RX_STALLED is set it is cleared.
3262  *
3263  *
3264  * Driver sequence:
3265  *
3266  * iwl4965_rx_queue_alloc()   Allocates rx_free
3267  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3268  *                            iwl4965_rx_queue_restock
3269  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3270  *                            queue, updates firmware pointers, and updates
3271  *                            the WRITE index.  If insufficient rx_free buffers
3272  *                            are available, schedules iwl4965_rx_replenish
3273  *
3274  * -- enable interrupts --
3275  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3276  *                            READ INDEX, detaching the SKB from the pool.
3277  *                            Moves the packet buffer from queue to rx_used.
3278  *                            Calls iwl4965_rx_queue_restock to refill any empty
3279  *                            slots.
3280  * ...
3281  *
3282  */
3283
3284 /**
3285  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3286  */
3287 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3288 {
3289         int s = q->read - q->write;
3290         if (s <= 0)
3291                 s += RX_QUEUE_SIZE;
3292         /* keep some buffer to not confuse full and empty queue */
3293         s -= 2;
3294         if (s < 0)
3295                 s = 0;
3296         return s;
3297 }
3298
3299 /**
3300  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3301  */
3302 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3303 {
3304         u32 reg = 0;
3305         int rc = 0;
3306         unsigned long flags;
3307
3308         spin_lock_irqsave(&q->lock, flags);
3309
3310         if (q->need_update == 0)
3311                 goto exit_unlock;
3312
3313         /* If power-saving is in use, make sure device is awake */
3314         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3315                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3316
3317                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3318                         iwl_set_bit(priv, CSR_GP_CNTRL,
3319                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3320                         goto exit_unlock;
3321                 }
3322
3323                 rc = iwl_grab_nic_access(priv);
3324                 if (rc)
3325                         goto exit_unlock;
3326
3327                 /* Device expects a multiple of 8 */
3328                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3329                                      q->write & ~0x7);
3330                 iwl_release_nic_access(priv);
3331
3332         /* Else device is assumed to be awake */
3333         } else
3334                 /* Device expects a multiple of 8 */
3335                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3336
3337
3338         q->need_update = 0;
3339
3340  exit_unlock:
3341         spin_unlock_irqrestore(&q->lock, flags);
3342         return rc;
3343 }
3344
3345 /**
3346  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3347  */
3348 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3349                                           dma_addr_t dma_addr)
3350 {
3351         return cpu_to_le32((u32)(dma_addr >> 8));
3352 }
3353
3354
3355 /**
3356  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3357  *
3358  * If there are slots in the RX queue that need to be restocked,
3359  * and we have free pre-allocated buffers, fill the ranks as much
3360  * as we can, pulling from rx_free.
3361  *
3362  * This moves the 'write' index forward to catch up with 'processed', and
3363  * also updates the memory address in the firmware to reference the new
3364  * target buffer.
3365  */
3366 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3367 {
3368         struct iwl4965_rx_queue *rxq = &priv->rxq;
3369         struct list_head *element;
3370         struct iwl4965_rx_mem_buffer *rxb;
3371         unsigned long flags;
3372         int write, rc;
3373
3374         spin_lock_irqsave(&rxq->lock, flags);
3375         write = rxq->write & ~0x7;
3376         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3377                 /* Get next free Rx buffer, remove from free list */
3378                 element = rxq->rx_free.next;
3379                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3380                 list_del(element);
3381
3382                 /* Point to Rx buffer via next RBD in circular buffer */
3383                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3384                 rxq->queue[rxq->write] = rxb;
3385                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3386                 rxq->free_count--;
3387         }
3388         spin_unlock_irqrestore(&rxq->lock, flags);
3389         /* If the pre-allocated buffer pool is dropping low, schedule to
3390          * refill it */
3391         if (rxq->free_count <= RX_LOW_WATERMARK)
3392                 queue_work(priv->workqueue, &priv->rx_replenish);
3393
3394
3395         /* If we've added more space for the firmware to place data, tell it.
3396          * Increment device's write pointer in multiples of 8. */
3397         if ((write != (rxq->write & ~0x7))
3398             || (abs(rxq->write - rxq->read) > 7)) {
3399                 spin_lock_irqsave(&rxq->lock, flags);
3400                 rxq->need_update = 1;
3401                 spin_unlock_irqrestore(&rxq->lock, flags);
3402                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3403                 if (rc)
3404                         return rc;
3405         }
3406
3407         return 0;
3408 }
3409
3410 /**
3411  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3412  *
3413  * When moving to rx_free an SKB is allocated for the slot.
3414  *
3415  * Also restock the Rx queue via iwl4965_rx_queue_restock.
3416  * This is called as a scheduled work item (except for during initialization)
3417  */
3418 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3419 {
3420         struct iwl4965_rx_queue *rxq = &priv->rxq;
3421         struct list_head *element;
3422         struct iwl4965_rx_mem_buffer *rxb;
3423         unsigned long flags;
3424         spin_lock_irqsave(&rxq->lock, flags);
3425         while (!list_empty(&rxq->rx_used)) {
3426                 element = rxq->rx_used.next;
3427                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3428
3429                 /* Alloc a new receive buffer */
3430                 rxb->skb =
3431                     alloc_skb(priv->hw_params.rx_buf_size,
3432                                 __GFP_NOWARN | GFP_ATOMIC);
3433                 if (!rxb->skb) {
3434                         if (net_ratelimit())
3435                                 printk(KERN_CRIT DRV_NAME
3436                                        ": Can not allocate SKB buffers\n");
3437                         /* We don't reschedule replenish work here -- we will
3438                          * call the restock method and if it still needs
3439                          * more buffers it will schedule replenish */
3440                         break;
3441                 }
3442                 priv->alloc_rxb_skb++;
3443                 list_del(element);
3444
3445                 /* Get physical address of RB/SKB */
3446                 rxb->dma_addr =
3447                     pci_map_single(priv->pci_dev, rxb->skb->data,
3448                            priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE);
3449                 list_add_tail(&rxb->list, &rxq->rx_free);
3450                 rxq->free_count++;
3451         }
3452         spin_unlock_irqrestore(&rxq->lock, flags);
3453 }
3454
3455 /*
3456  * this should be called while priv->lock is locked
3457 */
3458 static void __iwl4965_rx_replenish(void *data)
3459 {
3460         struct iwl_priv *priv = data;
3461
3462         iwl4965_rx_allocate(priv);
3463         iwl4965_rx_queue_restock(priv);
3464 }
3465
3466
3467 void iwl4965_rx_replenish(void *data)
3468 {
3469         struct iwl_priv *priv = data;
3470         unsigned long flags;
3471
3472         iwl4965_rx_allocate(priv);
3473
3474         spin_lock_irqsave(&priv->lock, flags);
3475         iwl4965_rx_queue_restock(priv);
3476         spin_unlock_irqrestore(&priv->lock, flags);
3477 }
3478
3479 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3480  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3481  * This free routine walks the list of POOL entries and if SKB is set to
3482  * non NULL it is unmapped and freed
3483  */
3484 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3485 {
3486         int i;
3487         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3488                 if (rxq->pool[i].skb != NULL) {
3489                         pci_unmap_single(priv->pci_dev,
3490                                          rxq->pool[i].dma_addr,
3491                                          priv->hw_params.rx_buf_size,
3492                                          PCI_DMA_FROMDEVICE);
3493                         dev_kfree_skb(rxq->pool[i].skb);
3494                 }
3495         }
3496
3497         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3498                             rxq->dma_addr);
3499         rxq->bd = NULL;
3500 }
3501
3502 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3503 {
3504         struct iwl4965_rx_queue *rxq = &priv->rxq;
3505         struct pci_dev *dev = priv->pci_dev;
3506         int i;
3507
3508         spin_lock_init(&rxq->lock);
3509         INIT_LIST_HEAD(&rxq->rx_free);
3510         INIT_LIST_HEAD(&rxq->rx_used);
3511
3512         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3513         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3514         if (!rxq->bd)
3515                 return -ENOMEM;
3516
3517         /* Fill the rx_used queue with _all_ of the Rx buffers */
3518         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3519                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3520
3521         /* Set us so that we have processed and used all buffers, but have
3522          * not restocked the Rx queue with fresh buffers */
3523         rxq->read = rxq->write = 0;
3524         rxq->free_count = 0;
3525         rxq->need_update = 0;
3526         return 0;
3527 }
3528
3529 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3530 {
3531         unsigned long flags;
3532         int i;
3533         spin_lock_irqsave(&rxq->lock, flags);
3534         INIT_LIST_HEAD(&rxq->rx_free);
3535         INIT_LIST_HEAD(&rxq->rx_used);
3536         /* Fill the rx_used queue with _all_ of the Rx buffers */
3537         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3538                 /* In the reset function, these buffers may have been allocated
3539                  * to an SKB, so we need to unmap and free potential storage */
3540                 if (rxq->pool[i].skb != NULL) {
3541                         pci_unmap_single(priv->pci_dev,
3542                                          rxq->pool[i].dma_addr,
3543                                          priv->hw_params.rx_buf_size,
3544                                          PCI_DMA_FROMDEVICE);
3545                         priv->alloc_rxb_skb--;
3546                         dev_kfree_skb(rxq->pool[i].skb);
3547                         rxq->pool[i].skb = NULL;
3548                 }
3549                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3550         }
3551
3552         /* Set us so that we have processed and used all buffers, but have
3553          * not restocked the Rx queue with fresh buffers */
3554         rxq->read = rxq->write = 0;
3555         rxq->free_count = 0;
3556         spin_unlock_irqrestore(&rxq->lock, flags);
3557 }
3558
3559 /* Convert linear signal-to-noise ratio into dB */
3560 static u8 ratio2dB[100] = {
3561 /*       0   1   2   3   4   5   6   7   8   9 */
3562          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3563         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3564         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3565         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3566         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3567         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3568         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3569         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3570         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3571         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3572 };
3573
3574 /* Calculates a relative dB value from a ratio of linear
3575  *   (i.e. not dB) signal levels.
3576  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3577 int iwl4965_calc_db_from_ratio(int sig_ratio)
3578 {
3579         /* 1000:1 or higher just report as 60 dB */
3580         if (sig_ratio >= 1000)
3581                 return 60;
3582
3583         /* 100:1 or higher, divide by 10 and use table,
3584          *   add 20 dB to make up for divide by 10 */
3585         if (sig_ratio >= 100)
3586                 return (20 + (int)ratio2dB[sig_ratio/10]);
3587
3588         /* We shouldn't see this */
3589         if (sig_ratio < 1)
3590                 return 0;
3591
3592         /* Use table for ratios 1:1 - 99:1 */
3593         return (int)ratio2dB[sig_ratio];
3594 }
3595
3596 #define PERFECT_RSSI (-20) /* dBm */
3597 #define WORST_RSSI (-95)   /* dBm */
3598 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3599
3600 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3601  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3602  *   about formulas used below. */
3603 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
3604 {
3605         int sig_qual;
3606         int degradation = PERFECT_RSSI - rssi_dbm;
3607
3608         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3609          * as indicator; formula is (signal dbm - noise dbm).
3610          * SNR at or above 40 is a great signal (100%).
3611          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3612          * Weakest usable signal is usually 10 - 15 dB SNR. */
3613         if (noise_dbm) {
3614                 if (rssi_dbm - noise_dbm >= 40)
3615                         return 100;
3616                 else if (rssi_dbm < noise_dbm)
3617                         return 0;
3618                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3619
3620         /* Else use just the signal level.
3621          * This formula is a least squares fit of data points collected and
3622          *   compared with a reference system that had a percentage (%) display
3623          *   for signal quality. */
3624         } else
3625                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3626                             (15 * RSSI_RANGE + 62 * degradation)) /
3627                            (RSSI_RANGE * RSSI_RANGE);
3628
3629         if (sig_qual > 100)
3630                 sig_qual = 100;
3631         else if (sig_qual < 1)
3632                 sig_qual = 0;
3633
3634         return sig_qual;
3635 }
3636
3637 /**
3638  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
3639  *
3640  * Uses the priv->rx_handlers callback function array to invoke
3641  * the appropriate handlers, including command responses,
3642  * frame-received notifications, and other notifications.
3643  */
3644 static void iwl4965_rx_handle(struct iwl_priv *priv)
3645 {
3646         struct iwl4965_rx_mem_buffer *rxb;
3647         struct iwl4965_rx_packet *pkt;
3648         struct iwl4965_rx_queue *rxq = &priv->rxq;
3649         u32 r, i;
3650         int reclaim;
3651         unsigned long flags;
3652         u8 fill_rx = 0;
3653         u32 count = 8;
3654
3655         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3656          * buffer that the driver may process (last buffer filled by ucode). */
3657         r = iwl4965_hw_get_rx_read(priv);
3658         i = rxq->read;
3659
3660         /* Rx interrupt, but nothing sent from uCode */
3661         if (i == r)
3662                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3663
3664         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3665                 fill_rx = 1;
3666
3667         while (i != r) {
3668                 rxb = rxq->queue[i];
3669
3670                 /* If an RXB doesn't have a Rx queue slot associated with it,
3671                  * then a bug has been introduced in the queue refilling
3672                  * routines -- catch it here */
3673                 BUG_ON(rxb == NULL);
3674
3675                 rxq->queue[i] = NULL;
3676
3677                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3678                                             priv->hw_params.rx_buf_size,
3679                                             PCI_DMA_FROMDEVICE);
3680                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3681
3682                 /* Reclaim a command buffer only if this packet is a response
3683                  *   to a (driver-originated) command.
3684                  * If the packet (e.g. Rx frame) originated from uCode,
3685                  *   there is no command buffer to reclaim.
3686                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3687                  *   but apparently a few don't get set; catch them here. */
3688                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3689                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
3690                         (pkt->hdr.cmd != REPLY_RX) &&
3691                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
3692                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3693                         (pkt->hdr.cmd != REPLY_TX);
3694
3695                 /* Based on type of command response or notification,
3696                  *   handle those that need handling via function in
3697                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
3698                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3699                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3700                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3701                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3702                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3703                 } else {
3704                         /* No handling needed */
3705                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3706                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3707                                 r, i, get_cmd_string(pkt->hdr.cmd),
3708                                 pkt->hdr.cmd);
3709                 }
3710
3711                 if (reclaim) {
3712                         /* Invoke any callbacks, transfer the skb to caller, and
3713                          * fire off the (possibly) blocking iwl_send_cmd()
3714                          * as we reclaim the driver command queue */
3715                         if (rxb && rxb->skb)
3716                                 iwl4965_tx_cmd_complete(priv, rxb);
3717                         else
3718                                 IWL_WARNING("Claim null rxb?\n");
3719                 }
3720
3721                 /* For now we just don't re-use anything.  We can tweak this
3722                  * later to try and re-use notification packets and SKBs that
3723                  * fail to Rx correctly */
3724                 if (rxb->skb != NULL) {
3725                         priv->alloc_rxb_skb--;
3726                         dev_kfree_skb_any(rxb->skb);
3727                         rxb->skb = NULL;
3728                 }
3729
3730                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3731                                  priv->hw_params.rx_buf_size,
3732                                  PCI_DMA_FROMDEVICE);
3733                 spin_lock_irqsave(&rxq->lock, flags);
3734                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3735                 spin_unlock_irqrestore(&rxq->lock, flags);
3736                 i = (i + 1) & RX_QUEUE_MASK;
3737                 /* If there are a lot of unused frames,
3738                  * restock the Rx queue so ucode wont assert. */
3739                 if (fill_rx) {
3740                         count++;
3741                         if (count >= 8) {
3742                                 priv->rxq.read = i;
3743                                 __iwl4965_rx_replenish(priv);
3744                                 count = 0;
3745                         }
3746                 }
3747         }
3748
3749         /* Backtrack one entry */
3750         priv->rxq.read = i;
3751         iwl4965_rx_queue_restock(priv);
3752 }
3753
3754 /**
3755  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
3756  */
3757 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
3758                                   struct iwl4965_tx_queue *txq)
3759 {
3760         u32 reg = 0;
3761         int rc = 0;
3762         int txq_id = txq->q.id;
3763
3764         if (txq->need_update == 0)
3765                 return rc;
3766
3767         /* if we're trying to save power */
3768         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3769                 /* wake up nic if it's powered down ...
3770                  * uCode will wake up, and interrupt us again, so next
3771                  * time we'll skip this part. */
3772                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3773
3774                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3775                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3776                         iwl_set_bit(priv, CSR_GP_CNTRL,
3777                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3778                         return rc;
3779                 }
3780
3781                 /* restore this queue's parameters in nic hardware. */
3782                 rc = iwl_grab_nic_access(priv);
3783                 if (rc)
3784                         return rc;
3785                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3786                                      txq->q.write_ptr | (txq_id << 8));
3787                 iwl_release_nic_access(priv);
3788
3789         /* else not in power-save mode, uCode will never sleep when we're
3790          * trying to tx (during RFKILL, we're not trying to tx). */
3791         } else
3792                 iwl_write32(priv, HBUS_TARG_WRPTR,
3793                             txq->q.write_ptr | (txq_id << 8));
3794
3795         txq->need_update = 0;
3796
3797         return rc;
3798 }
3799
3800 #ifdef CONFIG_IWLWIFI_DEBUG
3801 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
3802 {
3803         DECLARE_MAC_BUF(mac);
3804
3805         IWL_DEBUG_RADIO("RX CONFIG:\n");
3806         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3807         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3808         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3809         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3810                         le32_to_cpu(rxon->filter_flags));
3811         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3812         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3813                         rxon->ofdm_basic_rates);
3814         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3815         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
3816                         print_mac(mac, rxon->node_addr));
3817         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
3818                         print_mac(mac, rxon->bssid_addr));
3819         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3820 }
3821 #endif
3822
3823 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
3824 {
3825         IWL_DEBUG_ISR("Enabling interrupts\n");
3826         set_bit(STATUS_INT_ENABLED, &priv->status);
3827         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3828 }
3829
3830 /* call this function to flush any scheduled tasklet */
3831 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3832 {
3833         /* wait to make sure we flush pedding tasklet*/
3834         synchronize_irq(priv->pci_dev->irq);
3835         tasklet_kill(&priv->irq_tasklet);
3836 }
3837
3838 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
3839 {
3840         clear_bit(STATUS_INT_ENABLED, &priv->status);
3841
3842         /* disable interrupts from uCode/NIC to host */
3843         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3844
3845         /* acknowledge/clear/reset any interrupts still pending
3846          * from uCode or flow handler (Rx/Tx DMA) */
3847         iwl_write32(priv, CSR_INT, 0xffffffff);
3848         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3849         IWL_DEBUG_ISR("Disabled interrupts\n");
3850 }
3851
3852 static const char *desc_lookup(int i)
3853 {
3854         switch (i) {
3855         case 1:
3856                 return "FAIL";
3857         case 2:
3858                 return "BAD_PARAM";
3859         case 3:
3860                 return "BAD_CHECKSUM";
3861         case 4:
3862                 return "NMI_INTERRUPT";
3863         case 5:
3864                 return "SYSASSERT";
3865         case 6:
3866                 return "FATAL_ERROR";
3867         }
3868
3869         return "UNKNOWN";
3870 }
3871
3872 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3873 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3874
3875 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
3876 {
3877         u32 data2, line;
3878         u32 desc, time, count, base, data1;
3879         u32 blink1, blink2, ilink1, ilink2;
3880         int rc;
3881
3882         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3883
3884         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3885                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3886                 return;
3887         }
3888
3889         rc = iwl_grab_nic_access(priv);
3890         if (rc) {
3891                 IWL_WARNING("Can not read from adapter at this time.\n");
3892                 return;
3893         }
3894
3895         count = iwl_read_targ_mem(priv, base);
3896
3897         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3898                 IWL_ERROR("Start IWL Error Log Dump:\n");
3899                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3900         }
3901
3902         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
3903         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
3904         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
3905         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
3906         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
3907         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
3908         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
3909         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
3910         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
3911
3912         IWL_ERROR("Desc               Time       "
3913                   "data1      data2      line\n");
3914         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
3915                   desc_lookup(desc), desc, time, data1, data2, line);
3916         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
3917         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
3918                   ilink1, ilink2);
3919
3920         iwl_release_nic_access(priv);
3921 }
3922
3923 #define EVENT_START_OFFSET  (4 * sizeof(u32))
3924
3925 /**
3926  * iwl4965_print_event_log - Dump error event log to syslog
3927  *
3928  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
3929  */
3930 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
3931                                 u32 num_events, u32 mode)
3932 {
3933         u32 i;
3934         u32 base;       /* SRAM byte address of event log header */
3935         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
3936         u32 ptr;        /* SRAM byte address of log data */
3937         u32 ev, time, data; /* event log data */
3938
3939         if (num_events == 0)
3940                 return;
3941
3942         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3943
3944         if (mode == 0)
3945                 event_size = 2 * sizeof(u32);
3946         else
3947                 event_size = 3 * sizeof(u32);
3948
3949         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
3950
3951         /* "time" is actually "data" for mode 0 (no timestamp).
3952          * place event id # at far right for easier visual parsing. */
3953         for (i = 0; i < num_events; i++) {
3954                 ev = iwl_read_targ_mem(priv, ptr);
3955                 ptr += sizeof(u32);
3956                 time = iwl_read_targ_mem(priv, ptr);
3957                 ptr += sizeof(u32);
3958                 if (mode == 0)
3959                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
3960                 else {
3961                         data = iwl_read_targ_mem(priv, ptr);
3962                         ptr += sizeof(u32);
3963                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
3964                 }
3965         }
3966 }
3967
3968 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
3969 {
3970         int rc;
3971         u32 base;       /* SRAM byte address of event log header */
3972         u32 capacity;   /* event log capacity in # entries */
3973         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
3974         u32 num_wraps;  /* # times uCode wrapped to top of log */
3975         u32 next_entry; /* index of next entry to be written by uCode */
3976         u32 size;       /* # entries that we'll print */
3977
3978         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3979         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
3980                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
3981                 return;
3982         }
3983
3984         rc = iwl_grab_nic_access(priv);
3985         if (rc) {
3986                 IWL_WARNING("Can not read from adapter at this time.\n");
3987                 return;
3988         }
3989
3990         /* event log header */
3991         capacity = iwl_read_targ_mem(priv, base);
3992         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
3993         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
3994         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
3995
3996         size = num_wraps ? capacity : next_entry;
3997
3998         /* bail out if nothing in log */
3999         if (size == 0) {
4000                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4001                 iwl_release_nic_access(priv);
4002                 return;
4003         }
4004
4005         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4006                   size, num_wraps);
4007
4008         /* if uCode has wrapped back to top of log, start at the oldest entry,
4009          * i.e the next one that uCode would fill. */
4010         if (num_wraps)
4011                 iwl4965_print_event_log(priv, next_entry,
4012                                     capacity - next_entry, mode);
4013
4014         /* (then/else) start at top of log */
4015         iwl4965_print_event_log(priv, 0, next_entry, mode);
4016
4017         iwl_release_nic_access(priv);
4018 }
4019
4020 /**
4021  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4022  */
4023 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4024 {
4025         /* Set the FW error flag -- cleared on iwl4965_down */
4026         set_bit(STATUS_FW_ERROR, &priv->status);
4027
4028         /* Cancel currently queued command. */
4029         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4030
4031 #ifdef CONFIG_IWLWIFI_DEBUG
4032         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4033                 iwl4965_dump_nic_error_log(priv);
4034                 iwl4965_dump_nic_event_log(priv);
4035                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4036         }
4037 #endif
4038
4039         wake_up_interruptible(&priv->wait_command_queue);
4040
4041         /* Keep the restart process from trying to send host
4042          * commands by clearing the INIT status bit */
4043         clear_bit(STATUS_READY, &priv->status);
4044
4045         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4046                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4047                           "Restarting adapter due to uCode error.\n");
4048
4049                 if (iwl_is_associated(priv)) {
4050                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4051                                sizeof(priv->recovery_rxon));
4052                         priv->error_recovering = 1;
4053                 }
4054                 queue_work(priv->workqueue, &priv->restart);
4055         }
4056 }
4057
4058 static void iwl4965_error_recovery(struct iwl_priv *priv)
4059 {
4060         unsigned long flags;
4061
4062         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4063                sizeof(priv->staging_rxon));
4064         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4065         iwl4965_commit_rxon(priv);
4066
4067         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4068
4069         spin_lock_irqsave(&priv->lock, flags);
4070         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4071         priv->error_recovering = 0;
4072         spin_unlock_irqrestore(&priv->lock, flags);
4073 }
4074
4075 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4076 {
4077         u32 inta, handled = 0;
4078         u32 inta_fh;
4079         unsigned long flags;
4080 #ifdef CONFIG_IWLWIFI_DEBUG
4081         u32 inta_mask;
4082 #endif
4083
4084         spin_lock_irqsave(&priv->lock, flags);
4085
4086         /* Ack/clear/reset pending uCode interrupts.
4087          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4088          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4089         inta = iwl_read32(priv, CSR_INT);
4090         iwl_write32(priv, CSR_INT, inta);
4091
4092         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4093          * Any new interrupts that happen after this, either while we're
4094          * in this tasklet, or later, will show up in next ISR/tasklet. */
4095         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4096         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4097
4098 #ifdef CONFIG_IWLWIFI_DEBUG
4099         if (iwl_debug_level & IWL_DL_ISR) {
4100                 /* just for debug */
4101                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4102                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4103                               inta, inta_mask, inta_fh);
4104         }
4105 #endif
4106
4107         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4108          * atomic, make sure that inta covers all the interrupts that
4109          * we've discovered, even if FH interrupt came in just after
4110          * reading CSR_INT. */
4111         if (inta_fh & CSR49_FH_INT_RX_MASK)
4112                 inta |= CSR_INT_BIT_FH_RX;
4113         if (inta_fh & CSR49_FH_INT_TX_MASK)
4114                 inta |= CSR_INT_BIT_FH_TX;
4115
4116         /* Now service all interrupt bits discovered above. */
4117         if (inta & CSR_INT_BIT_HW_ERR) {
4118                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4119
4120                 /* Tell the device to stop sending interrupts */
4121                 iwl4965_disable_interrupts(priv);
4122
4123                 iwl4965_irq_handle_error(priv);
4124
4125                 handled |= CSR_INT_BIT_HW_ERR;
4126
4127                 spin_unlock_irqrestore(&priv->lock, flags);
4128
4129                 return;
4130         }
4131
4132 #ifdef CONFIG_IWLWIFI_DEBUG
4133         if (iwl_debug_level & (IWL_DL_ISR)) {
4134                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4135                 if (inta & CSR_INT_BIT_SCD)
4136                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4137                                       "the frame/frames.\n");
4138
4139                 /* Alive notification via Rx interrupt will do the real work */
4140                 if (inta & CSR_INT_BIT_ALIVE)
4141                         IWL_DEBUG_ISR("Alive interrupt\n");
4142         }
4143 #endif
4144         /* Safely ignore these bits for debug checks below */
4145         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4146
4147         /* HW RF KILL switch toggled */
4148         if (inta & CSR_INT_BIT_RF_KILL) {
4149                 int hw_rf_kill = 0;
4150                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4151                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4152                         hw_rf_kill = 1;
4153
4154                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4155                                 "RF_KILL bit toggled to %s.\n",
4156                                 hw_rf_kill ? "disable radio":"enable radio");
4157
4158                 /* Queue restart only if RF_KILL switch was set to "kill"
4159                  *   when we loaded driver, and is now set to "enable".
4160                  * After we're Alive, RF_KILL gets handled by
4161                  *   iwl4965_rx_card_state_notif() */
4162                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4163                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4164                         queue_work(priv->workqueue, &priv->restart);
4165                 }
4166
4167                 handled |= CSR_INT_BIT_RF_KILL;
4168         }
4169
4170         /* Chip got too hot and stopped itself */
4171         if (inta & CSR_INT_BIT_CT_KILL) {
4172                 IWL_ERROR("Microcode CT kill error detected.\n");
4173                 handled |= CSR_INT_BIT_CT_KILL;
4174         }
4175
4176         /* Error detected by uCode */
4177         if (inta & CSR_INT_BIT_SW_ERR) {
4178                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4179                           inta);
4180                 iwl4965_irq_handle_error(priv);
4181                 handled |= CSR_INT_BIT_SW_ERR;
4182         }
4183
4184         /* uCode wakes up after power-down sleep */
4185         if (inta & CSR_INT_BIT_WAKEUP) {
4186                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4187                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4188                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4189                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4190                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4191                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4192                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4193                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4194
4195                 handled |= CSR_INT_BIT_WAKEUP;
4196         }
4197
4198         /* All uCode command responses, including Tx command responses,
4199          * Rx "responses" (frame-received notification), and other
4200          * notifications from uCode come through here*/
4201         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4202                 iwl4965_rx_handle(priv);
4203                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4204         }
4205
4206         if (inta & CSR_INT_BIT_FH_TX) {
4207                 IWL_DEBUG_ISR("Tx interrupt\n");
4208                 handled |= CSR_INT_BIT_FH_TX;
4209         }
4210
4211         if (inta & ~handled)
4212                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4213
4214         if (inta & ~CSR_INI_SET_MASK) {
4215                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4216                          inta & ~CSR_INI_SET_MASK);
4217                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4218         }
4219
4220         /* Re-enable all interrupts */
4221         /* only Re-enable if diabled by irq */
4222         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4223                 iwl4965_enable_interrupts(priv);
4224
4225 #ifdef CONFIG_IWLWIFI_DEBUG
4226         if (iwl_debug_level & (IWL_DL_ISR)) {
4227                 inta = iwl_read32(priv, CSR_INT);
4228                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4229                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4230                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4231                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4232         }
4233 #endif
4234         spin_unlock_irqrestore(&priv->lock, flags);
4235 }
4236
4237 static irqreturn_t iwl4965_isr(int irq, void *data)
4238 {
4239         struct iwl_priv *priv = data;
4240         u32 inta, inta_mask;
4241         u32 inta_fh;
4242         if (!priv)
4243                 return IRQ_NONE;
4244
4245         spin_lock(&priv->lock);
4246
4247         /* Disable (but don't clear!) interrupts here to avoid
4248          *    back-to-back ISRs and sporadic interrupts from our NIC.
4249          * If we have something to service, the tasklet will re-enable ints.
4250          * If we *don't* have something, we'll re-enable before leaving here. */
4251         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4252         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4253
4254         /* Discover which interrupts are active/pending */
4255         inta = iwl_read32(priv, CSR_INT);
4256         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4257
4258         /* Ignore interrupt if there's nothing in NIC to service.
4259          * This may be due to IRQ shared with another device,
4260          * or due to sporadic interrupts thrown from our NIC. */
4261         if (!inta && !inta_fh) {
4262                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4263                 goto none;
4264         }
4265
4266         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4267                 /* Hardware disappeared. It might have already raised
4268                  * an interrupt */
4269                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4270                 goto unplugged;
4271         }
4272
4273         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4274                       inta, inta_mask, inta_fh);
4275
4276         inta &= ~CSR_INT_BIT_SCD;
4277
4278         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4279         if (likely(inta || inta_fh))
4280                 tasklet_schedule(&priv->irq_tasklet);
4281
4282  unplugged:
4283         spin_unlock(&priv->lock);
4284         return IRQ_HANDLED;
4285
4286  none:
4287         /* re-enable interrupts here since we don't have anything to service. */
4288         /* only Re-enable if diabled by irq */
4289         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4290                 iwl4965_enable_interrupts(priv);
4291         spin_unlock(&priv->lock);
4292         return IRQ_NONE;
4293 }
4294
4295 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4296  * sending probe req.  This should be set long enough to hear probe responses
4297  * from more than one AP.  */
4298 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4299 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4300
4301 /* For faster active scanning, scan will move to the next channel if fewer than
4302  * PLCP_QUIET_THRESH packets are heard on this channel within
4303  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4304  * time if it's a quiet channel (nothing responded to our probe, and there's
4305  * no other traffic).
4306  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4307 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4308 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4309
4310 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4311  * Must be set longer than active dwell time.
4312  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4313 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4314 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4315 #define IWL_PASSIVE_DWELL_BASE      (100)
4316 #define IWL_CHANNEL_TUNE_TIME       5
4317
4318 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4319                                                 enum ieee80211_band band)
4320 {
4321         if (band == IEEE80211_BAND_5GHZ)
4322                 return IWL_ACTIVE_DWELL_TIME_52;
4323         else
4324                 return IWL_ACTIVE_DWELL_TIME_24;
4325 }
4326
4327 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4328                                           enum ieee80211_band band)
4329 {
4330         u16 active = iwl4965_get_active_dwell_time(priv, band);
4331         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4332             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4333             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4334
4335         if (iwl_is_associated(priv)) {
4336                 /* If we're associated, we clamp the maximum passive
4337                  * dwell time to be 98% of the beacon interval (minus
4338                  * 2 * channel tune time) */
4339                 passive = priv->beacon_int;
4340                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4341                         passive = IWL_PASSIVE_DWELL_BASE;
4342                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4343         }
4344
4345         if (passive <= active)
4346                 passive = active + 1;
4347
4348         return passive;
4349 }
4350
4351 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4352                                          enum ieee80211_band band,
4353                                      u8 is_active, u8 direct_mask,
4354                                      struct iwl4965_scan_channel *scan_ch)
4355 {
4356         const struct ieee80211_channel *channels = NULL;
4357         const struct ieee80211_supported_band *sband;
4358         const struct iwl_channel_info *ch_info;
4359         u16 passive_dwell = 0;
4360         u16 active_dwell = 0;
4361         int added, i;
4362
4363         sband = iwl4965_get_hw_mode(priv, band);
4364         if (!sband)
4365                 return 0;
4366
4367         channels = sband->channels;
4368
4369         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4370         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4371
4372         for (i = 0, added = 0; i < sband->n_channels; i++) {
4373                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4374                         continue;
4375
4376                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4377
4378                 ch_info = iwl_get_channel_info(priv, band,
4379                                          scan_ch->channel);
4380                 if (!is_channel_valid(ch_info)) {
4381                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4382                                        scan_ch->channel);
4383                         continue;
4384                 }
4385
4386                 if (!is_active || is_channel_passive(ch_info) ||
4387                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4388                         scan_ch->type = 0;      /* passive */
4389                 else
4390                         scan_ch->type = 1;      /* active */
4391
4392                 if (scan_ch->type & 1)
4393                         scan_ch->type |= (direct_mask << 1);
4394
4395                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4396                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4397
4398                 /* Set txpower levels to defaults */
4399                 scan_ch->tpc.dsp_atten = 110;
4400                 /* scan_pwr_info->tpc.dsp_atten; */
4401
4402                 /*scan_pwr_info->tpc.tx_gain; */
4403                 if (band == IEEE80211_BAND_5GHZ)
4404                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4405                 else {
4406                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4407                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4408                          * power level:
4409                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4410                          */
4411                 }
4412
4413                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4414                                scan_ch->channel,
4415                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4416                                (scan_ch->type & 1) ?
4417                                active_dwell : passive_dwell);
4418
4419                 scan_ch++;
4420                 added++;
4421         }
4422
4423         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4424         return added;
4425 }
4426
4427 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4428                               struct ieee80211_rate *rates)
4429 {
4430         int i;
4431
4432         for (i = 0; i < IWL_RATE_COUNT; i++) {
4433                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4434                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4435                 rates[i].hw_value_short = i;
4436                 rates[i].flags = 0;
4437                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4438                         /*
4439                          * If CCK != 1M then set short preamble rate flag.
4440                          */
4441                         rates[i].flags |=
4442                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4443                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
4444                 }
4445         }
4446 }
4447
4448 /**
4449  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4450  */
4451 int iwl4965_init_geos(struct iwl_priv *priv)
4452 {
4453         struct iwl_channel_info *ch;
4454         struct ieee80211_supported_band *sband;
4455         struct ieee80211_channel *channels;
4456         struct ieee80211_channel *geo_ch;
4457         struct ieee80211_rate *rates;
4458         int i = 0;
4459
4460         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4461             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4462                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4463                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4464                 return 0;
4465         }
4466
4467         channels = kzalloc(sizeof(struct ieee80211_channel) *
4468                            priv->channel_count, GFP_KERNEL);
4469         if (!channels)
4470                 return -ENOMEM;
4471
4472         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4473                         GFP_KERNEL);
4474         if (!rates) {
4475                 kfree(channels);
4476                 return -ENOMEM;
4477         }
4478
4479         /* 5.2GHz channels start after the 2.4GHz channels */
4480         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4481         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4482         /* just OFDM */
4483         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4484         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4485
4486         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4487
4488         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4489         sband->channels = channels;
4490         /* OFDM & CCK */
4491         sband->bitrates = rates;
4492         sband->n_bitrates = IWL_RATE_COUNT;
4493
4494         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4495
4496         priv->ieee_channels = channels;
4497         priv->ieee_rates = rates;
4498
4499         iwl4965_init_hw_rates(priv, rates);
4500
4501         for (i = 0;  i < priv->channel_count; i++) {
4502                 ch = &priv->channel_info[i];
4503
4504                 /* FIXME: might be removed if scan is OK */
4505                 if (!is_channel_valid(ch))
4506                         continue;
4507
4508                 if (is_channel_a_band(ch))
4509                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4510                 else
4511                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4512
4513                 geo_ch = &sband->channels[sband->n_channels++];
4514
4515                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4516                 geo_ch->max_power = ch->max_power_avg;
4517                 geo_ch->max_antenna_gain = 0xff;
4518                 geo_ch->hw_value = ch->channel;
4519
4520                 if (is_channel_valid(ch)) {
4521                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4522                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4523
4524                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4525                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4526
4527                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4528                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4529
4530                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4531                                 priv->max_channel_txpower_limit =
4532                                     ch->max_power_avg;
4533                 } else {
4534                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4535                 }
4536
4537                 /* Save flags for reg domain usage */
4538                 geo_ch->orig_flags = geo_ch->flags;
4539
4540                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4541                                 ch->channel, geo_ch->center_freq,
4542                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4543                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4544                                 "restricted" : "valid",
4545                                  geo_ch->flags);
4546         }
4547
4548         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4549              priv->cfg->sku & IWL_SKU_A) {
4550                 printk(KERN_INFO DRV_NAME
4551                        ": Incorrectly detected BG card as ABG.  Please send "
4552                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4553                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4554                 priv->cfg->sku &= ~IWL_SKU_A;
4555         }
4556
4557         printk(KERN_INFO DRV_NAME
4558                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4559                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4560                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4561
4562         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4563                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4564                         &priv->bands[IEEE80211_BAND_2GHZ];
4565         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4566                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4567                         &priv->bands[IEEE80211_BAND_5GHZ];
4568
4569         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4570
4571         return 0;
4572 }
4573
4574 /*
4575  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
4576  */
4577 void iwl4965_free_geos(struct iwl_priv *priv)
4578 {
4579         kfree(priv->ieee_channels);
4580         kfree(priv->ieee_rates);
4581         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4582 }
4583
4584 /******************************************************************************
4585  *
4586  * uCode download functions
4587  *
4588  ******************************************************************************/
4589
4590 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
4591 {
4592         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4593         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4594         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4595         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4596         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4597         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4598 }
4599
4600 /**
4601  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
4602  *     looking at all data.
4603  */
4604 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
4605                                  u32 len)
4606 {
4607         u32 val;
4608         u32 save_len = len;
4609         int rc = 0;
4610         u32 errcnt;
4611
4612         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4613
4614         rc = iwl_grab_nic_access(priv);
4615         if (rc)
4616                 return rc;
4617
4618         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
4619
4620         errcnt = 0;
4621         for (; len > 0; len -= sizeof(u32), image++) {
4622                 /* read data comes through single port, auto-incr addr */
4623                 /* NOTE: Use the debugless read so we don't flood kernel log
4624                  * if IWL_DL_IO is set */
4625                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4626                 if (val != le32_to_cpu(*image)) {
4627                         IWL_ERROR("uCode INST section is invalid at "
4628                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4629                                   save_len - len, val, le32_to_cpu(*image));
4630                         rc = -EIO;
4631                         errcnt++;
4632                         if (errcnt >= 20)
4633                                 break;
4634                 }
4635         }
4636
4637         iwl_release_nic_access(priv);
4638
4639         if (!errcnt)
4640                 IWL_DEBUG_INFO
4641                     ("ucode image in INSTRUCTION memory is good\n");
4642
4643         return rc;
4644 }
4645
4646
4647 /**
4648  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
4649  *   using sample data 100 bytes apart.  If these sample points are good,
4650  *   it's a pretty good bet that everything between them is good, too.
4651  */
4652 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4653 {
4654         u32 val;
4655         int rc = 0;
4656         u32 errcnt = 0;
4657         u32 i;
4658
4659         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4660
4661         rc = iwl_grab_nic_access(priv);
4662         if (rc)
4663                 return rc;
4664
4665         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4666                 /* read data comes through single port, auto-incr addr */
4667                 /* NOTE: Use the debugless read so we don't flood kernel log
4668                  * if IWL_DL_IO is set */
4669                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4670                         i + RTC_INST_LOWER_BOUND);
4671                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4672                 if (val != le32_to_cpu(*image)) {
4673 #if 0 /* Enable this if you want to see details */
4674                         IWL_ERROR("uCode INST section is invalid at "
4675                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4676                                   i, val, *image);
4677 #endif
4678                         rc = -EIO;
4679                         errcnt++;
4680                         if (errcnt >= 3)
4681                                 break;
4682                 }
4683         }
4684
4685         iwl_release_nic_access(priv);
4686
4687         return rc;
4688 }
4689
4690
4691 /**
4692  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
4693  *    and verify its contents
4694  */
4695 static int iwl4965_verify_ucode(struct iwl_priv *priv)
4696 {
4697         __le32 *image;
4698         u32 len;
4699         int rc = 0;
4700
4701         /* Try bootstrap */
4702         image = (__le32 *)priv->ucode_boot.v_addr;
4703         len = priv->ucode_boot.len;
4704         rc = iwl4965_verify_inst_sparse(priv, image, len);
4705         if (rc == 0) {
4706                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
4707                 return 0;
4708         }
4709
4710         /* Try initialize */
4711         image = (__le32 *)priv->ucode_init.v_addr;
4712         len = priv->ucode_init.len;
4713         rc = iwl4965_verify_inst_sparse(priv, image, len);
4714         if (rc == 0) {
4715                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
4716                 return 0;
4717         }
4718
4719         /* Try runtime/protocol */
4720         image = (__le32 *)priv->ucode_code.v_addr;
4721         len = priv->ucode_code.len;
4722         rc = iwl4965_verify_inst_sparse(priv, image, len);
4723         if (rc == 0) {
4724                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
4725                 return 0;
4726         }
4727
4728         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
4729
4730         /* Since nothing seems to match, show first several data entries in
4731          * instruction SRAM, so maybe visual inspection will give a clue.
4732          * Selection of bootstrap image (vs. other images) is arbitrary. */
4733         image = (__le32 *)priv->ucode_boot.v_addr;
4734         len = priv->ucode_boot.len;
4735         rc = iwl4965_verify_inst_full(priv, image, len);
4736
4737         return rc;
4738 }
4739
4740 static void iwl4965_nic_start(struct iwl_priv *priv)
4741 {
4742         /* Remove all resets to allow NIC to operate */
4743         iwl_write32(priv, CSR_RESET, 0);
4744 }
4745
4746
4747 /**
4748  * iwl4965_read_ucode - Read uCode images from disk file.
4749  *
4750  * Copy into buffers for card to fetch via bus-mastering
4751  */
4752 static int iwl4965_read_ucode(struct iwl_priv *priv)
4753 {
4754         struct iwl4965_ucode *ucode;
4755         int ret;
4756         const struct firmware *ucode_raw;
4757         const char *name = priv->cfg->fw_name;
4758         u8 *src;
4759         size_t len;
4760         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
4761
4762         /* Ask kernel firmware_class module to get the boot firmware off disk.
4763          * request_firmware() is synchronous, file is in memory on return. */
4764         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
4765         if (ret < 0) {
4766                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
4767                                         name, ret);
4768                 goto error;
4769         }
4770
4771         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4772                        name, ucode_raw->size);
4773
4774         /* Make sure that we got at least our header! */
4775         if (ucode_raw->size < sizeof(*ucode)) {
4776                 IWL_ERROR("File size way too small!\n");
4777                 ret = -EINVAL;
4778                 goto err_release;
4779         }
4780
4781         /* Data from ucode file:  header followed by uCode images */
4782         ucode = (void *)ucode_raw->data;
4783
4784         ver = le32_to_cpu(ucode->ver);
4785         inst_size = le32_to_cpu(ucode->inst_size);
4786         data_size = le32_to_cpu(ucode->data_size);
4787         init_size = le32_to_cpu(ucode->init_size);
4788         init_data_size = le32_to_cpu(ucode->init_data_size);
4789         boot_size = le32_to_cpu(ucode->boot_size);
4790
4791         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
4792         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
4793                        inst_size);
4794         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
4795                        data_size);
4796         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
4797                        init_size);
4798         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
4799                        init_data_size);
4800         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
4801                        boot_size);
4802
4803         /* Verify size of file vs. image size info in file's header */
4804         if (ucode_raw->size < sizeof(*ucode) +
4805                 inst_size + data_size + init_size +
4806                 init_data_size + boot_size) {
4807
4808                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4809                                (int)ucode_raw->size);
4810                 ret = -EINVAL;
4811                 goto err_release;
4812         }
4813
4814         /* Verify that uCode images will fit in card's SRAM */
4815         if (inst_size > priv->hw_params.max_inst_size) {
4816                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4817                                inst_size);
4818                 ret = -EINVAL;
4819                 goto err_release;
4820         }
4821
4822         if (data_size > priv->hw_params.max_data_size) {
4823                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4824                                 data_size);
4825                 ret = -EINVAL;
4826                 goto err_release;
4827         }
4828         if (init_size > priv->hw_params.max_inst_size) {
4829                 IWL_DEBUG_INFO
4830                     ("uCode init instr len %d too large to fit in\n",
4831                       init_size);
4832                 ret = -EINVAL;
4833                 goto err_release;
4834         }
4835         if (init_data_size > priv->hw_params.max_data_size) {
4836                 IWL_DEBUG_INFO
4837                     ("uCode init data len %d too large to fit in\n",
4838                       init_data_size);
4839                 ret = -EINVAL;
4840                 goto err_release;
4841         }
4842         if (boot_size > priv->hw_params.max_bsm_size) {
4843                 IWL_DEBUG_INFO
4844                     ("uCode boot instr len %d too large to fit in\n",
4845                       boot_size);
4846                 ret = -EINVAL;
4847                 goto err_release;
4848         }
4849
4850         /* Allocate ucode buffers for card's bus-master loading ... */
4851
4852         /* Runtime instructions and 2 copies of data:
4853          * 1) unmodified from disk
4854          * 2) backup cache for save/restore during power-downs */
4855         priv->ucode_code.len = inst_size;
4856         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4857
4858         priv->ucode_data.len = data_size;
4859         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4860
4861         priv->ucode_data_backup.len = data_size;
4862         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4863
4864         /* Initialization instructions and data */
4865         if (init_size && init_data_size) {
4866                 priv->ucode_init.len = init_size;
4867                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4868
4869                 priv->ucode_init_data.len = init_data_size;
4870                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4871
4872                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4873                         goto err_pci_alloc;
4874         }
4875
4876         /* Bootstrap (instructions only, no data) */
4877         if (boot_size) {
4878                 priv->ucode_boot.len = boot_size;
4879                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4880
4881                 if (!priv->ucode_boot.v_addr)
4882                         goto err_pci_alloc;
4883         }
4884
4885         /* Copy images into buffers for card's bus-master reads ... */
4886
4887         /* Runtime instructions (first block of data in file) */
4888         src = &ucode->data[0];
4889         len = priv->ucode_code.len;
4890         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4891         memcpy(priv->ucode_code.v_addr, src, len);
4892         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4893                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4894
4895         /* Runtime data (2nd block)
4896          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
4897         src = &ucode->data[inst_size];
4898         len = priv->ucode_data.len;
4899         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4900         memcpy(priv->ucode_data.v_addr, src, len);
4901         memcpy(priv->ucode_data_backup.v_addr, src, len);
4902
4903         /* Initialization instructions (3rd block) */
4904         if (init_size) {
4905                 src = &ucode->data[inst_size + data_size];
4906                 len = priv->ucode_init.len;
4907                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4908                                 len);
4909                 memcpy(priv->ucode_init.v_addr, src, len);
4910         }
4911
4912         /* Initialization data (4th block) */
4913         if (init_data_size) {
4914                 src = &ucode->data[inst_size + data_size + init_size];
4915                 len = priv->ucode_init_data.len;
4916                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
4917                                len);
4918                 memcpy(priv->ucode_init_data.v_addr, src, len);
4919         }
4920
4921         /* Bootstrap instructions (5th block) */
4922         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4923         len = priv->ucode_boot.len;
4924         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
4925         memcpy(priv->ucode_boot.v_addr, src, len);
4926
4927         /* We have our copies now, allow OS release its copies */
4928         release_firmware(ucode_raw);
4929         return 0;
4930
4931  err_pci_alloc:
4932         IWL_ERROR("failed to allocate pci memory\n");
4933         ret = -ENOMEM;
4934         iwl4965_dealloc_ucode_pci(priv);
4935
4936  err_release:
4937         release_firmware(ucode_raw);
4938
4939  error:
4940         return ret;
4941 }
4942
4943
4944 /**
4945  * iwl4965_set_ucode_ptrs - Set uCode address location
4946  *
4947  * Tell initialization uCode where to find runtime uCode.
4948  *
4949  * BSM registers initially contain pointers to initialization uCode.
4950  * We need to replace them to load runtime uCode inst and data,
4951  * and to save runtime data when powering down.
4952  */
4953 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
4954 {
4955         dma_addr_t pinst;
4956         dma_addr_t pdata;
4957         int rc = 0;
4958         unsigned long flags;
4959
4960         /* bits 35:4 for 4965 */
4961         pinst = priv->ucode_code.p_addr >> 4;
4962         pdata = priv->ucode_data_backup.p_addr >> 4;
4963
4964         spin_lock_irqsave(&priv->lock, flags);
4965         rc = iwl_grab_nic_access(priv);
4966         if (rc) {
4967                 spin_unlock_irqrestore(&priv->lock, flags);
4968                 return rc;
4969         }
4970
4971         /* Tell bootstrap uCode where to find image to load */
4972         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4973         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4974         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4975                                  priv->ucode_data.len);
4976
4977         /* Inst bytecount must be last to set up, bit 31 signals uCode
4978          *   that all new ptr/size info is in place */
4979         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4980                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4981
4982         iwl_release_nic_access(priv);
4983
4984         spin_unlock_irqrestore(&priv->lock, flags);
4985
4986         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4987
4988         return rc;
4989 }
4990
4991 /**
4992  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
4993  *
4994  * Called after REPLY_ALIVE notification received from "initialize" uCode.
4995  *
4996  * The 4965 "initialize" ALIVE reply contains calibration data for:
4997  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
4998  *   (3945 does not contain this data).
4999  *
5000  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5001 */
5002 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5003 {
5004         /* Check alive response for "valid" sign from uCode */
5005         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5006                 /* We had an error bringing up the hardware, so take it
5007                  * all the way back down so we can try again */
5008                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5009                 goto restart;
5010         }
5011
5012         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5013          * This is a paranoid check, because we would not have gotten the
5014          * "initialize" alive if code weren't properly loaded.  */
5015         if (iwl4965_verify_ucode(priv)) {
5016                 /* Runtime instruction load was bad;
5017                  * take it all the way back down so we can try again */
5018                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5019                 goto restart;
5020         }
5021
5022         /* Calculate temperature */
5023         priv->temperature = iwl4965_get_temperature(priv);
5024
5025         /* Send pointers to protocol/runtime uCode image ... init code will
5026          * load and launch runtime uCode, which will send us another "Alive"
5027          * notification. */
5028         IWL_DEBUG_INFO("Initialization Alive received.\n");
5029         if (iwl4965_set_ucode_ptrs(priv)) {
5030                 /* Runtime instruction load won't happen;
5031                  * take it all the way back down so we can try again */
5032                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5033                 goto restart;
5034         }
5035         return;
5036
5037  restart:
5038         queue_work(priv->workqueue, &priv->restart);
5039 }
5040
5041
5042 /**
5043  * iwl4965_alive_start - called after REPLY_ALIVE notification received
5044  *                   from protocol/runtime uCode (initialization uCode's
5045  *                   Alive gets handled by iwl4965_init_alive_start()).
5046  */
5047 static void iwl4965_alive_start(struct iwl_priv *priv)
5048 {
5049         int ret = 0;
5050
5051         IWL_DEBUG_INFO("Runtime Alive received.\n");
5052
5053         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5054                 /* We had an error bringing up the hardware, so take it
5055                  * all the way back down so we can try again */
5056                 IWL_DEBUG_INFO("Alive failed.\n");
5057                 goto restart;
5058         }
5059
5060         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5061          * This is a paranoid check, because we would not have gotten the
5062          * "runtime" alive if code weren't properly loaded.  */
5063         if (iwl4965_verify_ucode(priv)) {
5064                 /* Runtime instruction load was bad;
5065                  * take it all the way back down so we can try again */
5066                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5067                 goto restart;
5068         }
5069
5070         iwlcore_clear_stations_table(priv);
5071
5072         ret = priv->cfg->ops->lib->alive_notify(priv);
5073         if (ret) {
5074                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5075                             ret);
5076                 goto restart;
5077         }
5078
5079         /* After the ALIVE response, we can send host commands to 4965 uCode */
5080         set_bit(STATUS_ALIVE, &priv->status);
5081
5082         /* Clear out the uCode error bit if it is set */
5083         clear_bit(STATUS_FW_ERROR, &priv->status);
5084
5085         if (iwl_is_rfkill(priv))
5086                 return;
5087
5088         ieee80211_start_queues(priv->hw);
5089
5090         priv->active_rate = priv->rates_mask;
5091         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5092
5093         if (iwl_is_associated(priv)) {
5094                 struct iwl4965_rxon_cmd *active_rxon =
5095                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5096
5097                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5098                        sizeof(priv->staging_rxon));
5099                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5100         } else {
5101                 /* Initialize our rx_config data */
5102                 iwl4965_connection_init_rx_config(priv);
5103                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5104         }
5105
5106         /* Configure Bluetooth device coexistence support */
5107         iwl4965_send_bt_config(priv);
5108
5109         /* Configure the adapter for unassociated operation */
5110         iwl4965_commit_rxon(priv);
5111
5112         /* At this point, the NIC is initialized and operational */
5113         priv->notif_missed_beacons = 0;
5114
5115         iwl4965_rf_kill_ct_config(priv);
5116
5117         iwl_leds_register(priv);
5118
5119         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5120         set_bit(STATUS_READY, &priv->status);
5121         wake_up_interruptible(&priv->wait_command_queue);
5122
5123         if (priv->error_recovering)
5124                 iwl4965_error_recovery(priv);
5125
5126         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5127         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5128         return;
5129
5130  restart:
5131         queue_work(priv->workqueue, &priv->restart);
5132 }
5133
5134 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5135
5136 static void __iwl4965_down(struct iwl_priv *priv)
5137 {
5138         unsigned long flags;
5139         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5140         struct ieee80211_conf *conf = NULL;
5141
5142         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5143
5144         conf = ieee80211_get_hw_conf(priv->hw);
5145
5146         if (!exit_pending)
5147                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5148
5149         iwl_leds_unregister(priv);
5150
5151         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5152
5153         iwlcore_clear_stations_table(priv);
5154
5155         /* Unblock any waiting calls */
5156         wake_up_interruptible_all(&priv->wait_command_queue);
5157
5158         /* Wipe out the EXIT_PENDING status bit if we are not actually
5159          * exiting the module */
5160         if (!exit_pending)
5161                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5162
5163         /* stop and reset the on-board processor */
5164         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5165
5166         /* tell the device to stop sending interrupts */
5167         spin_lock_irqsave(&priv->lock, flags);
5168         iwl4965_disable_interrupts(priv);
5169         spin_unlock_irqrestore(&priv->lock, flags);
5170         iwl_synchronize_irq(priv);
5171
5172         if (priv->mac80211_registered)
5173                 ieee80211_stop_queues(priv->hw);
5174
5175         /* If we have not previously called iwl4965_init() then
5176          * clear all bits but the RF Kill and SUSPEND bits and return */
5177         if (!iwl_is_init(priv)) {
5178                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5179                                         STATUS_RF_KILL_HW |
5180                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5181                                         STATUS_RF_KILL_SW |
5182                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5183                                         STATUS_GEO_CONFIGURED |
5184                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5185                                         STATUS_IN_SUSPEND;
5186                 goto exit;
5187         }
5188
5189         /* ...otherwise clear out all the status bits but the RF Kill and
5190          * SUSPEND bits and continue taking the NIC down. */
5191         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5192                                 STATUS_RF_KILL_HW |
5193                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5194                                 STATUS_RF_KILL_SW |
5195                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5196                                 STATUS_GEO_CONFIGURED |
5197                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5198                                 STATUS_IN_SUSPEND |
5199                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5200                                 STATUS_FW_ERROR;
5201
5202         spin_lock_irqsave(&priv->lock, flags);
5203         iwl_clear_bit(priv, CSR_GP_CNTRL,
5204                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5205         spin_unlock_irqrestore(&priv->lock, flags);
5206
5207         iwl4965_hw_txq_ctx_stop(priv);
5208         iwl4965_hw_rxq_stop(priv);
5209
5210         spin_lock_irqsave(&priv->lock, flags);
5211         if (!iwl_grab_nic_access(priv)) {
5212                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5213                                          APMG_CLK_VAL_DMA_CLK_RQT);
5214                 iwl_release_nic_access(priv);
5215         }
5216         spin_unlock_irqrestore(&priv->lock, flags);
5217
5218         udelay(5);
5219
5220         iwl4965_hw_nic_stop_master(priv);
5221         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5222         iwl4965_hw_nic_reset(priv);
5223
5224  exit:
5225         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5226
5227         if (priv->ibss_beacon)
5228                 dev_kfree_skb(priv->ibss_beacon);
5229         priv->ibss_beacon = NULL;
5230
5231         /* clear out any free frames */
5232         iwl4965_clear_free_frames(priv);
5233 }
5234
5235 static void iwl4965_down(struct iwl_priv *priv)
5236 {
5237         mutex_lock(&priv->mutex);
5238         __iwl4965_down(priv);
5239         mutex_unlock(&priv->mutex);
5240
5241         iwl4965_cancel_deferred_work(priv);
5242 }
5243
5244 #define MAX_HW_RESTARTS 5
5245
5246 static int __iwl4965_up(struct iwl_priv *priv)
5247 {
5248         int i;
5249         int ret;
5250
5251         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5252                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5253                 return -EIO;
5254         }
5255
5256         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5257                 IWL_WARNING("Radio disabled by SW RF kill (module "
5258                             "parameter)\n");
5259                 iwl_rfkill_set_hw_state(priv);
5260                 return -ENODEV;
5261         }
5262
5263         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5264                 IWL_ERROR("ucode not available for device bringup\n");
5265                 return -EIO;
5266         }
5267
5268         /* If platform's RF_KILL switch is NOT set to KILL */
5269         if (iwl_read32(priv, CSR_GP_CNTRL) &
5270                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5271                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5272         else {
5273                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5274                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5275                         iwl_rfkill_set_hw_state(priv);
5276                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5277                         return -ENODEV;
5278                 }
5279         }
5280
5281         iwl_rfkill_set_hw_state(priv);
5282         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5283
5284         ret = priv->cfg->ops->lib->hw_nic_init(priv);
5285         if (ret) {
5286                 IWL_ERROR("Unable to init nic\n");
5287                 return ret;
5288         }
5289
5290         /* make sure rfkill handshake bits are cleared */
5291         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5292         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5293                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5294
5295         /* clear (again), then enable host interrupts */
5296         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5297         iwl4965_enable_interrupts(priv);
5298
5299         /* really make sure rfkill handshake bits are cleared */
5300         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5301         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5302
5303         /* Copy original ucode data image from disk into backup cache.
5304          * This will be used to initialize the on-board processor's
5305          * data SRAM for a clean start when the runtime program first loads. */
5306         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5307                priv->ucode_data.len);
5308
5309         /* We return success when we resume from suspend and rf_kill is on. */
5310         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5311                 return 0;
5312
5313         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5314
5315                 iwlcore_clear_stations_table(priv);
5316
5317                 /* load bootstrap state machine,
5318                  * load bootstrap program into processor's memory,
5319                  * prepare to load the "initialize" uCode */
5320                 ret = priv->cfg->ops->lib->load_ucode(priv);
5321
5322                 if (ret) {
5323                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5324                         continue;
5325                 }
5326
5327                 /* start card; "initialize" will load runtime ucode */
5328                 iwl4965_nic_start(priv);
5329
5330                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5331
5332                 return 0;
5333         }
5334
5335         set_bit(STATUS_EXIT_PENDING, &priv->status);
5336         __iwl4965_down(priv);
5337
5338         /* tried to restart and config the device for as long as our
5339          * patience could withstand */
5340         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5341         return -EIO;
5342 }
5343
5344
5345 /*****************************************************************************
5346  *
5347  * Workqueue callbacks
5348  *
5349  *****************************************************************************/
5350
5351 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5352 {
5353         struct iwl_priv *priv =
5354             container_of(data, struct iwl_priv, init_alive_start.work);
5355
5356         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5357                 return;
5358
5359         mutex_lock(&priv->mutex);
5360         iwl4965_init_alive_start(priv);
5361         mutex_unlock(&priv->mutex);
5362 }
5363
5364 static void iwl4965_bg_alive_start(struct work_struct *data)
5365 {
5366         struct iwl_priv *priv =
5367             container_of(data, struct iwl_priv, alive_start.work);
5368
5369         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5370                 return;
5371
5372         mutex_lock(&priv->mutex);
5373         iwl4965_alive_start(priv);
5374         mutex_unlock(&priv->mutex);
5375 }
5376
5377 static void iwl4965_bg_rf_kill(struct work_struct *work)
5378 {
5379         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5380
5381         wake_up_interruptible(&priv->wait_command_queue);
5382
5383         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5384                 return;
5385
5386         mutex_lock(&priv->mutex);
5387
5388         if (!iwl_is_rfkill(priv)) {
5389                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5390                           "HW and/or SW RF Kill no longer active, restarting "
5391                           "device\n");
5392                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5393                         queue_work(priv->workqueue, &priv->restart);
5394         } else {
5395                 /* make sure mac80211 stop sending Tx frame */
5396                 if (priv->mac80211_registered)
5397                         ieee80211_stop_queues(priv->hw);
5398
5399                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5400                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5401                                           "disabled by SW switch\n");
5402                 else
5403                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5404                                     "Kill switch must be turned off for "
5405                                     "wireless networking to work.\n");
5406         }
5407         iwl_rfkill_set_hw_state(priv);
5408
5409         mutex_unlock(&priv->mutex);
5410 }
5411
5412 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5413
5414 static void iwl4965_bg_scan_check(struct work_struct *data)
5415 {
5416         struct iwl_priv *priv =
5417             container_of(data, struct iwl_priv, scan_check.work);
5418
5419         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5420                 return;
5421
5422         mutex_lock(&priv->mutex);
5423         if (test_bit(STATUS_SCANNING, &priv->status) ||
5424             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5425                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5426                           "Scan completion watchdog resetting adapter (%dms)\n",
5427                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5428
5429                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5430                         iwl4965_send_scan_abort(priv);
5431         }
5432         mutex_unlock(&priv->mutex);
5433 }
5434
5435 static void iwl4965_bg_request_scan(struct work_struct *data)
5436 {
5437         struct iwl_priv *priv =
5438             container_of(data, struct iwl_priv, request_scan);
5439         struct iwl_host_cmd cmd = {
5440                 .id = REPLY_SCAN_CMD,
5441                 .len = sizeof(struct iwl4965_scan_cmd),
5442                 .meta.flags = CMD_SIZE_HUGE,
5443         };
5444         struct iwl4965_scan_cmd *scan;
5445         struct ieee80211_conf *conf = NULL;
5446         u16 cmd_len;
5447         enum ieee80211_band band;
5448         u8 direct_mask;
5449         int ret = 0;
5450
5451         conf = ieee80211_get_hw_conf(priv->hw);
5452
5453         mutex_lock(&priv->mutex);
5454
5455         if (!iwl_is_ready(priv)) {
5456                 IWL_WARNING("request scan called when driver not ready.\n");
5457                 goto done;
5458         }
5459
5460         /* Make sure the scan wasn't cancelled before this queued work
5461          * was given the chance to run... */
5462         if (!test_bit(STATUS_SCANNING, &priv->status))
5463                 goto done;
5464
5465         /* This should never be called or scheduled if there is currently
5466          * a scan active in the hardware. */
5467         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5468                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5469                                "Ignoring second request.\n");
5470                 ret = -EIO;
5471                 goto done;
5472         }
5473
5474         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5475                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5476                 goto done;
5477         }
5478
5479         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5480                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5481                 goto done;
5482         }
5483
5484         if (iwl_is_rfkill(priv)) {
5485                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5486                 goto done;
5487         }
5488
5489         if (!test_bit(STATUS_READY, &priv->status)) {
5490                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5491                 goto done;
5492         }
5493
5494         if (!priv->scan_bands) {
5495                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5496                 goto done;
5497         }
5498
5499         if (!priv->scan) {
5500                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5501                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5502                 if (!priv->scan) {
5503                         ret = -ENOMEM;
5504                         goto done;
5505                 }
5506         }
5507         scan = priv->scan;
5508         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5509
5510         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5511         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5512
5513         if (iwl_is_associated(priv)) {
5514                 u16 interval = 0;
5515                 u32 extra;
5516                 u32 suspend_time = 100;
5517                 u32 scan_suspend_time = 100;
5518                 unsigned long flags;
5519
5520                 IWL_DEBUG_INFO("Scanning while associated...\n");
5521
5522                 spin_lock_irqsave(&priv->lock, flags);
5523                 interval = priv->beacon_int;
5524                 spin_unlock_irqrestore(&priv->lock, flags);
5525
5526                 scan->suspend_time = 0;
5527                 scan->max_out_time = cpu_to_le32(200 * 1024);
5528                 if (!interval)
5529                         interval = suspend_time;
5530
5531                 extra = (suspend_time / interval) << 22;
5532                 scan_suspend_time = (extra |
5533                     ((suspend_time % interval) * 1024));
5534                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5535                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5536                                scan_suspend_time, interval);
5537         }
5538
5539         /* We should add the ability for user to lock to PASSIVE ONLY */
5540         if (priv->one_direct_scan) {
5541                 IWL_DEBUG_SCAN
5542                     ("Kicking off one direct scan for '%s'\n",
5543                      iwl4965_escape_essid(priv->direct_ssid,
5544                                       priv->direct_ssid_len));
5545                 scan->direct_scan[0].id = WLAN_EID_SSID;
5546                 scan->direct_scan[0].len = priv->direct_ssid_len;
5547                 memcpy(scan->direct_scan[0].ssid,
5548                        priv->direct_ssid, priv->direct_ssid_len);
5549                 direct_mask = 1;
5550         } else if (!iwl_is_associated(priv) && priv->essid_len) {
5551                 IWL_DEBUG_SCAN
5552                   ("Kicking off one direct scan for '%s' when not associated\n",
5553                    iwl4965_escape_essid(priv->essid, priv->essid_len));
5554                 scan->direct_scan[0].id = WLAN_EID_SSID;
5555                 scan->direct_scan[0].len = priv->essid_len;
5556                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5557                 direct_mask = 1;
5558         } else {
5559                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5560                 direct_mask = 0;
5561         }
5562
5563         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5564         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5565         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5566
5567
5568         switch (priv->scan_bands) {
5569         case 2:
5570                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5571                 scan->tx_cmd.rate_n_flags =
5572                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
5573                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
5574
5575                 scan->good_CRC_th = 0;
5576                 band = IEEE80211_BAND_2GHZ;
5577                 break;
5578
5579         case 1:
5580                 scan->tx_cmd.rate_n_flags =
5581                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
5582                                 RATE_MCS_ANT_B_MSK);
5583                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5584                 band = IEEE80211_BAND_5GHZ;
5585                 break;
5586
5587         default:
5588                 IWL_WARNING("Invalid scan band count\n");
5589                 goto done;
5590         }
5591
5592         /* We don't build a direct scan probe request; the uCode will do
5593          * that based on the direct_mask added to each channel entry */
5594         cmd_len = iwl4965_fill_probe_req(priv, band,
5595                                         (struct ieee80211_mgmt *)scan->data,
5596                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
5597
5598         scan->tx_cmd.len = cpu_to_le16(cmd_len);
5599         /* select Rx chains */
5600
5601         /* Force use of chains B and C (0x6) for scan Rx.
5602          * Avoid A (0x1) because of its off-channel reception on A-band.
5603          * MIMO is not used here, but value is required to make uCode happy. */
5604         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
5605                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
5606                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
5607                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
5608
5609         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
5610                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5611
5612         if (direct_mask)
5613                 scan->channel_count =
5614                         iwl4965_get_channels_for_scan(
5615                                 priv, band, 1, /* active */
5616                                 direct_mask,
5617                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5618         else
5619                 scan->channel_count =
5620                         iwl4965_get_channels_for_scan(
5621                                 priv, band, 0, /* passive */
5622                                 direct_mask,
5623                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5624
5625         scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
5626                                RXON_FILTER_BCON_AWARE_MSK);
5627         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5628             scan->channel_count * sizeof(struct iwl4965_scan_channel);
5629         cmd.data = scan;
5630         scan->len = cpu_to_le16(cmd.len);
5631
5632         set_bit(STATUS_SCAN_HW, &priv->status);
5633         ret = iwl_send_cmd_sync(priv, &cmd);
5634         if (ret)
5635                 goto done;
5636
5637         queue_delayed_work(priv->workqueue, &priv->scan_check,
5638                            IWL_SCAN_CHECK_WATCHDOG);
5639
5640         mutex_unlock(&priv->mutex);
5641         return;
5642
5643  done:
5644         /* inform mac80211 scan aborted */
5645         queue_work(priv->workqueue, &priv->scan_completed);
5646         mutex_unlock(&priv->mutex);
5647 }
5648
5649 static void iwl4965_bg_up(struct work_struct *data)
5650 {
5651         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5652
5653         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5654                 return;
5655
5656         mutex_lock(&priv->mutex);
5657         __iwl4965_up(priv);
5658         mutex_unlock(&priv->mutex);
5659 }
5660
5661 static void iwl4965_bg_restart(struct work_struct *data)
5662 {
5663         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5664
5665         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5666                 return;
5667
5668         iwl4965_down(priv);
5669         queue_work(priv->workqueue, &priv->up);
5670 }
5671
5672 static void iwl4965_bg_rx_replenish(struct work_struct *data)
5673 {
5674         struct iwl_priv *priv =
5675             container_of(data, struct iwl_priv, rx_replenish);
5676
5677         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5678                 return;
5679
5680         mutex_lock(&priv->mutex);
5681         iwl4965_rx_replenish(priv);
5682         mutex_unlock(&priv->mutex);
5683 }
5684
5685 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5686
5687 static void iwl4965_post_associate(struct iwl_priv *priv)
5688 {
5689         struct ieee80211_conf *conf = NULL;
5690         int ret = 0;
5691         DECLARE_MAC_BUF(mac);
5692
5693         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
5694                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
5695                 return;
5696         }
5697
5698         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
5699                         priv->assoc_id,
5700                         print_mac(mac, priv->active_rxon.bssid_addr));
5701
5702
5703         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5704                 return;
5705
5706
5707         if (!priv->vif || !priv->is_open)
5708                 return;
5709
5710         iwl4965_scan_cancel_timeout(priv, 200);
5711
5712         conf = ieee80211_get_hw_conf(priv->hw);
5713
5714         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5715         iwl4965_commit_rxon(priv);
5716
5717         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
5718         iwl4965_setup_rxon_timing(priv);
5719         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5720                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5721         if (ret)
5722                 IWL_WARNING("REPLY_RXON_TIMING failed - "
5723                             "Attempting to continue.\n");
5724
5725         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5726
5727 #ifdef CONFIG_IWL4965_HT
5728         if (priv->current_ht_config.is_ht)
5729                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
5730 #endif /* CONFIG_IWL4965_HT*/
5731         iwl4965_set_rxon_chain(priv);
5732         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5733
5734         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5735                         priv->assoc_id, priv->beacon_int);
5736
5737         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5738                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5739         else
5740                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5741
5742         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5743                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5744                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5745                 else
5746                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5747
5748                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5749                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5750
5751         }
5752
5753         iwl4965_commit_rxon(priv);
5754
5755         switch (priv->iw_mode) {
5756         case IEEE80211_IF_TYPE_STA:
5757                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
5758                 break;
5759
5760         case IEEE80211_IF_TYPE_IBSS:
5761
5762                 /* clear out the station table */
5763                 iwlcore_clear_stations_table(priv);
5764
5765                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
5766                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
5767                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
5768                 iwl4965_send_beacon_cmd(priv);
5769
5770                 break;
5771
5772         default:
5773                 IWL_ERROR("%s Should not be called in %d mode\n",
5774                                 __FUNCTION__, priv->iw_mode);
5775                 break;
5776         }
5777
5778         iwl4965_sequence_reset(priv);
5779
5780         /* Enable Rx differential gain and sensitivity calibrations */
5781         iwl_chain_noise_reset(priv);
5782         priv->start_calib = 1;
5783
5784         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
5785                 priv->assoc_station_added = 1;
5786
5787         iwl4965_activate_qos(priv, 0);
5788
5789         iwl_power_update_mode(priv, 0);
5790         /* we have just associated, don't start scan too early */
5791         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5792 }
5793
5794
5795 static void iwl4965_bg_post_associate(struct work_struct *data)
5796 {
5797         struct iwl_priv *priv = container_of(data, struct iwl_priv,
5798                                              post_associate.work);
5799
5800         mutex_lock(&priv->mutex);
5801         iwl4965_post_associate(priv);
5802         mutex_unlock(&priv->mutex);
5803
5804 }
5805
5806 static void iwl4965_bg_abort_scan(struct work_struct *work)
5807 {
5808         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5809
5810         if (!iwl_is_ready(priv))
5811                 return;
5812
5813         mutex_lock(&priv->mutex);
5814
5815         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5816         iwl4965_send_scan_abort(priv);
5817
5818         mutex_unlock(&priv->mutex);
5819 }
5820
5821 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
5822
5823 static void iwl4965_bg_scan_completed(struct work_struct *work)
5824 {
5825         struct iwl_priv *priv =
5826             container_of(work, struct iwl_priv, scan_completed);
5827
5828         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5829
5830         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5831                 return;
5832
5833         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5834                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
5835
5836         ieee80211_scan_completed(priv->hw);
5837
5838         /* Since setting the TXPOWER may have been deferred while
5839          * performing the scan, fire one off */
5840         mutex_lock(&priv->mutex);
5841         iwl4965_hw_reg_send_txpower(priv);
5842         mutex_unlock(&priv->mutex);
5843 }
5844
5845 /*****************************************************************************
5846  *
5847  * mac80211 entry point functions
5848  *
5849  *****************************************************************************/
5850
5851 #define UCODE_READY_TIMEOUT     (2 * HZ)
5852
5853 static int iwl4965_mac_start(struct ieee80211_hw *hw)
5854 {
5855         struct iwl_priv *priv = hw->priv;
5856         int ret;
5857
5858         IWL_DEBUG_MAC80211("enter\n");
5859
5860         if (pci_enable_device(priv->pci_dev)) {
5861                 IWL_ERROR("Fail to pci_enable_device\n");
5862                 return -ENODEV;
5863         }
5864         pci_restore_state(priv->pci_dev);
5865         pci_enable_msi(priv->pci_dev);
5866
5867         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
5868                           DRV_NAME, priv);
5869         if (ret) {
5870                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
5871                 goto out_disable_msi;
5872         }
5873
5874         /* we should be verifying the device is ready to be opened */
5875         mutex_lock(&priv->mutex);
5876
5877         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
5878         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5879          * ucode filename and max sizes are card-specific. */
5880
5881         if (!priv->ucode_code.len) {
5882                 ret = iwl4965_read_ucode(priv);
5883                 if (ret) {
5884                         IWL_ERROR("Could not read microcode: %d\n", ret);
5885                         mutex_unlock(&priv->mutex);
5886                         goto out_release_irq;
5887                 }
5888         }
5889
5890         ret = __iwl4965_up(priv);
5891
5892         mutex_unlock(&priv->mutex);
5893
5894         if (ret)
5895                 goto out_release_irq;
5896
5897         IWL_DEBUG_INFO("Start UP work done.\n");
5898
5899         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5900                 return 0;
5901
5902         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5903          * mac80211 will not be run successfully. */
5904         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5905                         test_bit(STATUS_READY, &priv->status),
5906                         UCODE_READY_TIMEOUT);
5907         if (!ret) {
5908                 if (!test_bit(STATUS_READY, &priv->status)) {
5909                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
5910                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
5911                         ret = -ETIMEDOUT;
5912                         goto out_release_irq;
5913                 }
5914         }
5915
5916         priv->is_open = 1;
5917         IWL_DEBUG_MAC80211("leave\n");
5918         return 0;
5919
5920 out_release_irq:
5921         free_irq(priv->pci_dev->irq, priv);
5922 out_disable_msi:
5923         pci_disable_msi(priv->pci_dev);
5924         pci_disable_device(priv->pci_dev);
5925         priv->is_open = 0;
5926         IWL_DEBUG_MAC80211("leave - failed\n");
5927         return ret;
5928 }
5929
5930 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
5931 {
5932         struct iwl_priv *priv = hw->priv;
5933
5934         IWL_DEBUG_MAC80211("enter\n");
5935
5936         if (!priv->is_open) {
5937                 IWL_DEBUG_MAC80211("leave - skip\n");
5938                 return;
5939         }
5940
5941         priv->is_open = 0;
5942
5943         if (iwl_is_ready_rf(priv)) {
5944                 /* stop mac, cancel any scan request and clear
5945                  * RXON_FILTER_ASSOC_MSK BIT
5946                  */
5947                 mutex_lock(&priv->mutex);
5948                 iwl4965_scan_cancel_timeout(priv, 100);
5949                 cancel_delayed_work(&priv->post_associate);
5950                 mutex_unlock(&priv->mutex);
5951         }
5952
5953         iwl4965_down(priv);
5954
5955         flush_workqueue(priv->workqueue);
5956         free_irq(priv->pci_dev->irq, priv);
5957         pci_disable_msi(priv->pci_dev);
5958         pci_save_state(priv->pci_dev);
5959         pci_disable_device(priv->pci_dev);
5960
5961         IWL_DEBUG_MAC80211("leave\n");
5962 }
5963
5964 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
5965                       struct ieee80211_tx_control *ctl)
5966 {
5967         struct iwl_priv *priv = hw->priv;
5968
5969         IWL_DEBUG_MAC80211("enter\n");
5970
5971         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
5972                 IWL_DEBUG_MAC80211("leave - monitor\n");
5973                 return -1;
5974         }
5975
5976         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5977                      ctl->tx_rate->bitrate);
5978
5979         if (iwl4965_tx_skb(priv, skb, ctl))
5980                 dev_kfree_skb_any(skb);
5981
5982         IWL_DEBUG_MAC80211("leave\n");
5983         return 0;
5984 }
5985
5986 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
5987                                  struct ieee80211_if_init_conf *conf)
5988 {
5989         struct iwl_priv *priv = hw->priv;
5990         unsigned long flags;
5991         DECLARE_MAC_BUF(mac);
5992
5993         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5994
5995         if (priv->vif) {
5996                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5997                 return -EOPNOTSUPP;
5998         }
5999
6000         spin_lock_irqsave(&priv->lock, flags);
6001         priv->vif = conf->vif;
6002
6003         spin_unlock_irqrestore(&priv->lock, flags);
6004
6005         mutex_lock(&priv->mutex);
6006
6007         if (conf->mac_addr) {
6008                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6009                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6010         }
6011
6012         if (iwl_is_ready(priv))
6013                 iwl4965_set_mode(priv, conf->type);
6014
6015         mutex_unlock(&priv->mutex);
6016
6017         IWL_DEBUG_MAC80211("leave\n");
6018         return 0;
6019 }
6020
6021 /**
6022  * iwl4965_mac_config - mac80211 config callback
6023  *
6024  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6025  * be set inappropriately and the driver currently sets the hardware up to
6026  * use it whenever needed.
6027  */
6028 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6029 {
6030         struct iwl_priv *priv = hw->priv;
6031         const struct iwl_channel_info *ch_info;
6032         unsigned long flags;
6033         int ret = 0;
6034
6035         mutex_lock(&priv->mutex);
6036         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6037
6038         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6039
6040         if (!iwl_is_ready(priv)) {
6041                 IWL_DEBUG_MAC80211("leave - not ready\n");
6042                 ret = -EIO;
6043                 goto out;
6044         }
6045
6046         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6047                      test_bit(STATUS_SCANNING, &priv->status))) {
6048                 IWL_DEBUG_MAC80211("leave - scanning\n");
6049                 set_bit(STATUS_CONF_PENDING, &priv->status);
6050                 mutex_unlock(&priv->mutex);
6051                 return 0;
6052         }
6053
6054         spin_lock_irqsave(&priv->lock, flags);
6055
6056         ch_info = iwl_get_channel_info(priv, conf->channel->band,
6057                         ieee80211_frequency_to_channel(conf->channel->center_freq));
6058         if (!is_channel_valid(ch_info)) {
6059                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6060                 spin_unlock_irqrestore(&priv->lock, flags);
6061                 ret = -EINVAL;
6062                 goto out;
6063         }
6064
6065 #ifdef CONFIG_IWL4965_HT
6066         /* if we are switching from ht to 2.4 clear flags
6067          * from any ht related info since 2.4 does not
6068          * support ht */
6069         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6070 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6071             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6072 #endif
6073         )
6074                 priv->staging_rxon.flags = 0;
6075 #endif /* CONFIG_IWL4965_HT */
6076
6077         iwlcore_set_rxon_channel(priv, conf->channel->band,
6078                 ieee80211_frequency_to_channel(conf->channel->center_freq));
6079
6080         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6081
6082         /* The list of supported rates and rate mask can be different
6083          * for each band; since the band may have changed, reset
6084          * the rate mask to what mac80211 lists */
6085         iwl4965_set_rate(priv);
6086
6087         spin_unlock_irqrestore(&priv->lock, flags);
6088
6089 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6090         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6091                 iwl4965_hw_channel_switch(priv, conf->channel);
6092                 goto out;
6093         }
6094 #endif
6095
6096         if (priv->cfg->ops->lib->radio_kill_sw)
6097                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6098
6099         if (!conf->radio_enabled) {
6100                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6101                 goto out;
6102         }
6103
6104         if (iwl_is_rfkill(priv)) {
6105                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6106                 ret = -EIO;
6107                 goto out;
6108         }
6109
6110         iwl4965_set_rate(priv);
6111
6112         if (memcmp(&priv->active_rxon,
6113                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6114                 iwl4965_commit_rxon(priv);
6115         else
6116                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6117
6118         IWL_DEBUG_MAC80211("leave\n");
6119
6120 out:
6121         clear_bit(STATUS_CONF_PENDING, &priv->status);
6122         mutex_unlock(&priv->mutex);
6123         return ret;
6124 }
6125
6126 static void iwl4965_config_ap(struct iwl_priv *priv)
6127 {
6128         int ret = 0;
6129
6130         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6131                 return;
6132
6133         /* The following should be done only at AP bring up */
6134         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6135
6136                 /* RXON - unassoc (to set timing command) */
6137                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6138                 iwl4965_commit_rxon(priv);
6139
6140                 /* RXON Timing */
6141                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6142                 iwl4965_setup_rxon_timing(priv);
6143                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6144                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6145                 if (ret)
6146                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6147                                         "Attempting to continue.\n");
6148
6149                 iwl4965_set_rxon_chain(priv);
6150
6151                 /* FIXME: what should be the assoc_id for AP? */
6152                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6153                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6154                         priv->staging_rxon.flags |=
6155                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6156                 else
6157                         priv->staging_rxon.flags &=
6158                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6159
6160                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6161                         if (priv->assoc_capability &
6162                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6163                                 priv->staging_rxon.flags |=
6164                                         RXON_FLG_SHORT_SLOT_MSK;
6165                         else
6166                                 priv->staging_rxon.flags &=
6167                                         ~RXON_FLG_SHORT_SLOT_MSK;
6168
6169                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6170                                 priv->staging_rxon.flags &=
6171                                         ~RXON_FLG_SHORT_SLOT_MSK;
6172                 }
6173                 /* restore RXON assoc */
6174                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6175                 iwl4965_commit_rxon(priv);
6176                 iwl4965_activate_qos(priv, 1);
6177                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6178         }
6179         iwl4965_send_beacon_cmd(priv);
6180
6181         /* FIXME - we need to add code here to detect a totally new
6182          * configuration, reset the AP, unassoc, rxon timing, assoc,
6183          * clear sta table, add BCAST sta... */
6184 }
6185
6186 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6187                                         struct ieee80211_vif *vif,
6188                                     struct ieee80211_if_conf *conf)
6189 {
6190         struct iwl_priv *priv = hw->priv;
6191         DECLARE_MAC_BUF(mac);
6192         unsigned long flags;
6193         int rc;
6194
6195         if (conf == NULL)
6196                 return -EIO;
6197
6198         if (priv->vif != vif) {
6199                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6200                 return 0;
6201         }
6202
6203         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6204             (!conf->beacon || !conf->ssid_len)) {
6205                 IWL_DEBUG_MAC80211
6206                     ("Leaving in AP mode because HostAPD is not ready.\n");
6207                 return 0;
6208         }
6209
6210         if (!iwl_is_alive(priv))
6211                 return -EAGAIN;
6212
6213         mutex_lock(&priv->mutex);
6214
6215         if (conf->bssid)
6216                 IWL_DEBUG_MAC80211("bssid: %s\n",
6217                                    print_mac(mac, conf->bssid));
6218
6219 /*
6220  * very dubious code was here; the probe filtering flag is never set:
6221  *
6222         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6223             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6224  */
6225
6226         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6227                 if (!conf->bssid) {
6228                         conf->bssid = priv->mac_addr;
6229                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6230                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6231                                            print_mac(mac, conf->bssid));
6232                 }
6233                 if (priv->ibss_beacon)
6234                         dev_kfree_skb(priv->ibss_beacon);
6235
6236                 priv->ibss_beacon = conf->beacon;
6237         }
6238
6239         if (iwl_is_rfkill(priv))
6240                 goto done;
6241
6242         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6243             !is_multicast_ether_addr(conf->bssid)) {
6244                 /* If there is currently a HW scan going on in the background
6245                  * then we need to cancel it else the RXON below will fail. */
6246                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6247                         IWL_WARNING("Aborted scan still in progress "
6248                                     "after 100ms\n");
6249                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6250                         mutex_unlock(&priv->mutex);
6251                         return -EAGAIN;
6252                 }
6253                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6254
6255                 /* TODO: Audit driver for usage of these members and see
6256                  * if mac80211 deprecates them (priv->bssid looks like it
6257                  * shouldn't be there, but I haven't scanned the IBSS code
6258                  * to verify) - jpk */
6259                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6260
6261                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6262                         iwl4965_config_ap(priv);
6263                 else {
6264                         rc = iwl4965_commit_rxon(priv);
6265                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6266                                 iwl4965_rxon_add_station(
6267                                         priv, priv->active_rxon.bssid_addr, 1);
6268                 }
6269
6270         } else {
6271                 iwl4965_scan_cancel_timeout(priv, 100);
6272                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6273                 iwl4965_commit_rxon(priv);
6274         }
6275
6276  done:
6277         spin_lock_irqsave(&priv->lock, flags);
6278         if (!conf->ssid_len)
6279                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6280         else
6281                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6282
6283         priv->essid_len = conf->ssid_len;
6284         spin_unlock_irqrestore(&priv->lock, flags);
6285
6286         IWL_DEBUG_MAC80211("leave\n");
6287         mutex_unlock(&priv->mutex);
6288
6289         return 0;
6290 }
6291
6292 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6293                                  unsigned int changed_flags,
6294                                  unsigned int *total_flags,
6295                                  int mc_count, struct dev_addr_list *mc_list)
6296 {
6297         /*
6298          * XXX: dummy
6299          * see also iwl4965_connection_init_rx_config
6300          */
6301         *total_flags = 0;
6302 }
6303
6304 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6305                                      struct ieee80211_if_init_conf *conf)
6306 {
6307         struct iwl_priv *priv = hw->priv;
6308
6309         IWL_DEBUG_MAC80211("enter\n");
6310
6311         mutex_lock(&priv->mutex);
6312
6313         if (iwl_is_ready_rf(priv)) {
6314                 iwl4965_scan_cancel_timeout(priv, 100);
6315                 cancel_delayed_work(&priv->post_associate);
6316                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6317                 iwl4965_commit_rxon(priv);
6318         }
6319         if (priv->vif == conf->vif) {
6320                 priv->vif = NULL;
6321                 memset(priv->bssid, 0, ETH_ALEN);
6322                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6323                 priv->essid_len = 0;
6324         }
6325         mutex_unlock(&priv->mutex);
6326
6327         IWL_DEBUG_MAC80211("leave\n");
6328
6329 }
6330
6331
6332 #ifdef CONFIG_IWL4965_HT
6333 static void iwl4965_ht_conf(struct iwl_priv *priv,
6334                             struct ieee80211_bss_conf *bss_conf)
6335 {
6336         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
6337         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
6338         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
6339
6340         IWL_DEBUG_MAC80211("enter: \n");
6341
6342         iwl_conf->is_ht = bss_conf->assoc_ht;
6343
6344         if (!iwl_conf->is_ht)
6345                 return;
6346
6347         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6348
6349         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
6350                 iwl_conf->sgf |= 0x1;
6351         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
6352                 iwl_conf->sgf |= 0x2;
6353
6354         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
6355         iwl_conf->max_amsdu_size =
6356                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
6357
6358         iwl_conf->supported_chan_width =
6359                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
6360         iwl_conf->extension_chan_offset =
6361                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
6362         /* If no above or below channel supplied disable FAT channel */
6363         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
6364             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
6365                 iwl_conf->supported_chan_width = 0;
6366
6367         iwl_conf->tx_mimo_ps_mode =
6368                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6369         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
6370
6371         iwl_conf->control_channel = ht_bss_conf->primary_channel;
6372         iwl_conf->tx_chan_width =
6373                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
6374         iwl_conf->ht_protection =
6375                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
6376         iwl_conf->non_GF_STA_present =
6377                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
6378
6379         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
6380         IWL_DEBUG_MAC80211("leave\n");
6381 }
6382 #else
6383 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
6384                                    struct ieee80211_bss_conf *bss_conf)
6385 {
6386 }
6387 #endif
6388
6389 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6390 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6391                                      struct ieee80211_vif *vif,
6392                                      struct ieee80211_bss_conf *bss_conf,
6393                                      u32 changes)
6394 {
6395         struct iwl_priv *priv = hw->priv;
6396
6397         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6398
6399         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6400                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6401                                    bss_conf->use_short_preamble);
6402                 if (bss_conf->use_short_preamble)
6403                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6404                 else
6405                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6406         }
6407
6408         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6409                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6410                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6411                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6412                 else
6413                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6414         }
6415
6416         if (changes & BSS_CHANGED_HT) {
6417                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6418                 iwl4965_ht_conf(priv, bss_conf);
6419                 iwl4965_set_rxon_chain(priv);
6420         }
6421
6422         if (changes & BSS_CHANGED_ASSOC) {
6423                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6424                 /* This should never happen as this function should
6425                  * never be called from interrupt context. */
6426                 if (WARN_ON_ONCE(in_interrupt()))
6427                         return;
6428                 if (bss_conf->assoc) {
6429                         priv->assoc_id = bss_conf->aid;
6430                         priv->beacon_int = bss_conf->beacon_int;
6431                         priv->timestamp = bss_conf->timestamp;
6432                         priv->assoc_capability = bss_conf->assoc_capability;
6433                         priv->next_scan_jiffies = jiffies +
6434                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6435                         mutex_lock(&priv->mutex);
6436                         iwl4965_post_associate(priv);
6437                         mutex_unlock(&priv->mutex);
6438                 } else {
6439                         priv->assoc_id = 0;
6440                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6441                 }
6442         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6443                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6444                         iwl_send_rxon_assoc(priv);
6445         }
6446
6447 }
6448
6449 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6450 {
6451         int rc = 0;
6452         unsigned long flags;
6453         struct iwl_priv *priv = hw->priv;
6454
6455         IWL_DEBUG_MAC80211("enter\n");
6456
6457         mutex_lock(&priv->mutex);
6458         spin_lock_irqsave(&priv->lock, flags);
6459
6460         if (!iwl_is_ready_rf(priv)) {
6461                 rc = -EIO;
6462                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6463                 goto out_unlock;
6464         }
6465
6466         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6467                 rc = -EIO;
6468                 IWL_ERROR("ERROR: APs don't scan\n");
6469                 goto out_unlock;
6470         }
6471
6472         /* we don't schedule scan within next_scan_jiffies period */
6473         if (priv->next_scan_jiffies &&
6474                         time_after(priv->next_scan_jiffies, jiffies)) {
6475                 rc = -EAGAIN;
6476                 goto out_unlock;
6477         }
6478         /* if we just finished scan ask for delay */
6479         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6480                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
6481                 rc = -EAGAIN;
6482                 goto out_unlock;
6483         }
6484         if (len) {
6485                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6486                                iwl4965_escape_essid(ssid, len), (int)len);
6487
6488                 priv->one_direct_scan = 1;
6489                 priv->direct_ssid_len = (u8)
6490                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6491                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6492         } else
6493                 priv->one_direct_scan = 0;
6494
6495         rc = iwl4965_scan_initiate(priv);
6496
6497         IWL_DEBUG_MAC80211("leave\n");
6498
6499 out_unlock:
6500         spin_unlock_irqrestore(&priv->lock, flags);
6501         mutex_unlock(&priv->mutex);
6502
6503         return rc;
6504 }
6505
6506 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6507                         struct ieee80211_key_conf *keyconf, const u8 *addr,
6508                         u32 iv32, u16 *phase1key)
6509 {
6510         struct iwl_priv *priv = hw->priv;
6511         u8 sta_id = IWL_INVALID_STATION;
6512         unsigned long flags;
6513         __le16 key_flags = 0;
6514         int i;
6515         DECLARE_MAC_BUF(mac);
6516
6517         IWL_DEBUG_MAC80211("enter\n");
6518
6519         sta_id = iwl_find_station(priv, addr);
6520         if (sta_id == IWL_INVALID_STATION) {
6521                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6522                                    print_mac(mac, addr));
6523                 return;
6524         }
6525
6526         iwl4965_scan_cancel_timeout(priv, 100);
6527
6528         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6529         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6530         key_flags &= ~STA_KEY_FLG_INVALID;
6531
6532         if (sta_id == priv->hw_params.bcast_sta_id)
6533                 key_flags |= STA_KEY_MULTICAST_MSK;
6534
6535         spin_lock_irqsave(&priv->sta_lock, flags);
6536
6537         priv->stations[sta_id].sta.key.key_flags = key_flags;
6538         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6539
6540         for (i = 0; i < 5; i++)
6541                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6542                         cpu_to_le16(phase1key[i]);
6543
6544         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6545         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6546
6547         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6548
6549         spin_unlock_irqrestore(&priv->sta_lock, flags);
6550
6551         IWL_DEBUG_MAC80211("leave\n");
6552 }
6553
6554 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6555                            const u8 *local_addr, const u8 *addr,
6556                            struct ieee80211_key_conf *key)
6557 {
6558         struct iwl_priv *priv = hw->priv;
6559         DECLARE_MAC_BUF(mac);
6560         int ret = 0;
6561         u8 sta_id = IWL_INVALID_STATION;
6562         u8 is_default_wep_key = 0;
6563
6564         IWL_DEBUG_MAC80211("enter\n");
6565
6566         if (priv->hw_params.sw_crypto) {
6567                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6568                 return -EOPNOTSUPP;
6569         }
6570
6571         if (is_zero_ether_addr(addr))
6572                 /* only support pairwise keys */
6573                 return -EOPNOTSUPP;
6574
6575         sta_id = iwl_find_station(priv, addr);
6576         if (sta_id == IWL_INVALID_STATION) {
6577                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6578                                    print_mac(mac, addr));
6579                 return -EINVAL;
6580
6581         }
6582
6583         mutex_lock(&priv->mutex);
6584         iwl4965_scan_cancel_timeout(priv, 100);
6585         mutex_unlock(&priv->mutex);
6586
6587         /* If we are getting WEP group key and we didn't receive any key mapping
6588          * so far, we are in legacy wep mode (group key only), otherwise we are
6589          * in 1X mode.
6590          * In legacy wep mode, we use another host command to the uCode */
6591         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
6592                 priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6593                 if (cmd == SET_KEY)
6594                         is_default_wep_key = !priv->key_mapping_key;
6595                 else
6596                         is_default_wep_key = priv->default_wep_key;
6597         }
6598
6599         switch (cmd) {
6600         case SET_KEY:
6601                 if (is_default_wep_key)
6602                         ret = iwl_set_default_wep_key(priv, key);
6603                 else
6604                         ret = iwl_set_dynamic_key(priv, key, sta_id);
6605
6606                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
6607                 break;
6608         case DISABLE_KEY:
6609                 if (is_default_wep_key)
6610                         ret = iwl_remove_default_wep_key(priv, key);
6611                 else
6612                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
6613
6614                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6615                 break;
6616         default:
6617                 ret = -EINVAL;
6618         }
6619
6620         IWL_DEBUG_MAC80211("leave\n");
6621
6622         return ret;
6623 }
6624
6625 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
6626                            const struct ieee80211_tx_queue_params *params)
6627 {
6628         struct iwl_priv *priv = hw->priv;
6629         unsigned long flags;
6630         int q;
6631
6632         IWL_DEBUG_MAC80211("enter\n");
6633
6634         if (!iwl_is_ready_rf(priv)) {
6635                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6636                 return -EIO;
6637         }
6638
6639         if (queue >= AC_NUM) {
6640                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6641                 return 0;
6642         }
6643
6644         if (!priv->qos_data.qos_enable) {
6645                 priv->qos_data.qos_active = 0;
6646                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
6647                 return 0;
6648         }
6649         q = AC_NUM - 1 - queue;
6650
6651         spin_lock_irqsave(&priv->lock, flags);
6652
6653         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6654         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6655         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6656         priv->qos_data.def_qos_parm.ac[q].edca_txop =
6657                         cpu_to_le16((params->txop * 32));
6658
6659         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6660         priv->qos_data.qos_active = 1;
6661
6662         spin_unlock_irqrestore(&priv->lock, flags);
6663
6664         mutex_lock(&priv->mutex);
6665         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6666                 iwl4965_activate_qos(priv, 1);
6667         else if (priv->assoc_id && iwl_is_associated(priv))
6668                 iwl4965_activate_qos(priv, 0);
6669
6670         mutex_unlock(&priv->mutex);
6671
6672         IWL_DEBUG_MAC80211("leave\n");
6673         return 0;
6674 }
6675
6676 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
6677                                 struct ieee80211_tx_queue_stats *stats)
6678 {
6679         struct iwl_priv *priv = hw->priv;
6680         int i, avail;
6681         struct iwl4965_tx_queue *txq;
6682         struct iwl4965_queue *q;
6683         unsigned long flags;
6684
6685         IWL_DEBUG_MAC80211("enter\n");
6686
6687         if (!iwl_is_ready_rf(priv)) {
6688                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6689                 return -EIO;
6690         }
6691
6692         spin_lock_irqsave(&priv->lock, flags);
6693
6694         for (i = 0; i < AC_NUM; i++) {
6695                 txq = &priv->txq[i];
6696                 q = &txq->q;
6697                 avail = iwl4965_queue_space(q);
6698
6699                 stats->data[i].len = q->n_window - avail;
6700                 stats->data[i].limit = q->n_window - q->high_mark;
6701                 stats->data[i].count = q->n_window;
6702
6703         }
6704         spin_unlock_irqrestore(&priv->lock, flags);
6705
6706         IWL_DEBUG_MAC80211("leave\n");
6707
6708         return 0;
6709 }
6710
6711 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
6712                              struct ieee80211_low_level_stats *stats)
6713 {
6714         IWL_DEBUG_MAC80211("enter\n");
6715         IWL_DEBUG_MAC80211("leave\n");
6716
6717         return 0;
6718 }
6719
6720 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
6721 {
6722         IWL_DEBUG_MAC80211("enter\n");
6723         IWL_DEBUG_MAC80211("leave\n");
6724
6725         return 0;
6726 }
6727
6728 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
6729 {
6730         struct iwl_priv *priv = hw->priv;
6731         unsigned long flags;
6732
6733         mutex_lock(&priv->mutex);
6734         IWL_DEBUG_MAC80211("enter\n");
6735
6736         priv->lq_mngr.lq_ready = 0;
6737 #ifdef CONFIG_IWL4965_HT
6738         spin_lock_irqsave(&priv->lock, flags);
6739         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
6740         spin_unlock_irqrestore(&priv->lock, flags);
6741 #endif /* CONFIG_IWL4965_HT */
6742
6743         iwlcore_reset_qos(priv);
6744
6745         cancel_delayed_work(&priv->post_associate);
6746
6747         spin_lock_irqsave(&priv->lock, flags);
6748         priv->assoc_id = 0;
6749         priv->assoc_capability = 0;
6750         priv->assoc_station_added = 0;
6751
6752         /* new association get rid of ibss beacon skb */
6753         if (priv->ibss_beacon)
6754                 dev_kfree_skb(priv->ibss_beacon);
6755
6756         priv->ibss_beacon = NULL;
6757
6758         priv->beacon_int = priv->hw->conf.beacon_int;
6759         priv->timestamp = 0;
6760         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
6761                 priv->beacon_int = 0;
6762
6763         spin_unlock_irqrestore(&priv->lock, flags);
6764
6765         if (!iwl_is_ready_rf(priv)) {
6766                 IWL_DEBUG_MAC80211("leave - not ready\n");
6767                 mutex_unlock(&priv->mutex);
6768                 return;
6769         }
6770
6771         /* we are restarting association process
6772          * clear RXON_FILTER_ASSOC_MSK bit
6773          */
6774         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
6775                 iwl4965_scan_cancel_timeout(priv, 100);
6776                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6777                 iwl4965_commit_rxon(priv);
6778         }
6779
6780         iwl_power_update_mode(priv, 0);
6781
6782         /* Per mac80211.h: This is only used in IBSS mode... */
6783         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6784
6785                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6786                 mutex_unlock(&priv->mutex);
6787                 return;
6788         }
6789
6790         iwl4965_set_rate(priv);
6791
6792         mutex_unlock(&priv->mutex);
6793
6794         IWL_DEBUG_MAC80211("leave\n");
6795 }
6796
6797 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
6798                                  struct ieee80211_tx_control *control)
6799 {
6800         struct iwl_priv *priv = hw->priv;
6801         unsigned long flags;
6802
6803         mutex_lock(&priv->mutex);
6804         IWL_DEBUG_MAC80211("enter\n");
6805
6806         if (!iwl_is_ready_rf(priv)) {
6807                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6808                 mutex_unlock(&priv->mutex);
6809                 return -EIO;
6810         }
6811
6812         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
6813                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6814                 mutex_unlock(&priv->mutex);
6815                 return -EIO;
6816         }
6817
6818         spin_lock_irqsave(&priv->lock, flags);
6819
6820         if (priv->ibss_beacon)
6821                 dev_kfree_skb(priv->ibss_beacon);
6822
6823         priv->ibss_beacon = skb;
6824
6825         priv->assoc_id = 0;
6826
6827         IWL_DEBUG_MAC80211("leave\n");
6828         spin_unlock_irqrestore(&priv->lock, flags);
6829
6830         iwlcore_reset_qos(priv);
6831
6832         queue_work(priv->workqueue, &priv->post_associate.work);
6833
6834         mutex_unlock(&priv->mutex);
6835
6836         return 0;
6837 }
6838
6839 /*****************************************************************************
6840  *
6841  * sysfs attributes
6842  *
6843  *****************************************************************************/
6844
6845 #ifdef CONFIG_IWLWIFI_DEBUG
6846
6847 /*
6848  * The following adds a new attribute to the sysfs representation
6849  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6850  * used for controlling the debug level.
6851  *
6852  * See the level definitions in iwl for details.
6853  */
6854
6855 static ssize_t show_debug_level(struct device_driver *d, char *buf)
6856 {
6857         return sprintf(buf, "0x%08X\n", iwl_debug_level);
6858 }
6859 static ssize_t store_debug_level(struct device_driver *d,
6860                                  const char *buf, size_t count)
6861 {
6862         char *p = (char *)buf;
6863         u32 val;
6864
6865         val = simple_strtoul(p, &p, 0);
6866         if (p == buf)
6867                 printk(KERN_INFO DRV_NAME
6868                        ": %s is not in hex or decimal form.\n", buf);
6869         else
6870                 iwl_debug_level = val;
6871
6872         return strnlen(buf, count);
6873 }
6874
6875 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
6876                    show_debug_level, store_debug_level);
6877
6878 #endif /* CONFIG_IWLWIFI_DEBUG */
6879
6880
6881 static ssize_t show_temperature(struct device *d,
6882                                 struct device_attribute *attr, char *buf)
6883 {
6884         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6885
6886         if (!iwl_is_alive(priv))
6887                 return -EAGAIN;
6888
6889         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
6890 }
6891
6892 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6893
6894 static ssize_t show_rs_window(struct device *d,
6895                               struct device_attribute *attr,
6896                               char *buf)
6897 {
6898         struct iwl_priv *priv = d->driver_data;
6899         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
6900 }
6901 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
6902
6903 static ssize_t show_tx_power(struct device *d,
6904                              struct device_attribute *attr, char *buf)
6905 {
6906         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6907         return sprintf(buf, "%d\n", priv->user_txpower_limit);
6908 }
6909
6910 static ssize_t store_tx_power(struct device *d,
6911                               struct device_attribute *attr,
6912                               const char *buf, size_t count)
6913 {
6914         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6915         char *p = (char *)buf;
6916         u32 val;
6917
6918         val = simple_strtoul(p, &p, 10);
6919         if (p == buf)
6920                 printk(KERN_INFO DRV_NAME
6921                        ": %s is not in decimal form.\n", buf);
6922         else
6923                 iwl4965_hw_reg_set_txpower(priv, val);
6924
6925         return count;
6926 }
6927
6928 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6929
6930 static ssize_t show_flags(struct device *d,
6931                           struct device_attribute *attr, char *buf)
6932 {
6933         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6934
6935         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
6936 }
6937
6938 static ssize_t store_flags(struct device *d,
6939                            struct device_attribute *attr,
6940                            const char *buf, size_t count)
6941 {
6942         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6943         u32 flags = simple_strtoul(buf, NULL, 0);
6944
6945         mutex_lock(&priv->mutex);
6946         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
6947                 /* Cancel any currently running scans... */
6948                 if (iwl4965_scan_cancel_timeout(priv, 100))
6949                         IWL_WARNING("Could not cancel scan.\n");
6950                 else {
6951                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6952                                        flags);
6953                         priv->staging_rxon.flags = cpu_to_le32(flags);
6954                         iwl4965_commit_rxon(priv);
6955                 }
6956         }
6957         mutex_unlock(&priv->mutex);
6958
6959         return count;
6960 }
6961
6962 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6963
6964 static ssize_t show_filter_flags(struct device *d,
6965                                  struct device_attribute *attr, char *buf)
6966 {
6967         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6968
6969         return sprintf(buf, "0x%04X\n",
6970                 le32_to_cpu(priv->active_rxon.filter_flags));
6971 }
6972
6973 static ssize_t store_filter_flags(struct device *d,
6974                                   struct device_attribute *attr,
6975                                   const char *buf, size_t count)
6976 {
6977         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6978         u32 filter_flags = simple_strtoul(buf, NULL, 0);
6979
6980         mutex_lock(&priv->mutex);
6981         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
6982                 /* Cancel any currently running scans... */
6983                 if (iwl4965_scan_cancel_timeout(priv, 100))
6984                         IWL_WARNING("Could not cancel scan.\n");
6985                 else {
6986                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
6987                                        "0x%04X\n", filter_flags);
6988                         priv->staging_rxon.filter_flags =
6989                                 cpu_to_le32(filter_flags);
6990                         iwl4965_commit_rxon(priv);
6991                 }
6992         }
6993         mutex_unlock(&priv->mutex);
6994
6995         return count;
6996 }
6997
6998 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
6999                    store_filter_flags);
7000
7001 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7002
7003 static ssize_t show_measurement(struct device *d,
7004                                 struct device_attribute *attr, char *buf)
7005 {
7006         struct iwl_priv *priv = dev_get_drvdata(d);
7007         struct iwl4965_spectrum_notification measure_report;
7008         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7009         u8 *data = (u8 *) & measure_report;
7010         unsigned long flags;
7011
7012         spin_lock_irqsave(&priv->lock, flags);
7013         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7014                 spin_unlock_irqrestore(&priv->lock, flags);
7015                 return 0;
7016         }
7017         memcpy(&measure_report, &priv->measure_report, size);
7018         priv->measurement_status = 0;
7019         spin_unlock_irqrestore(&priv->lock, flags);
7020
7021         while (size && (PAGE_SIZE - len)) {
7022                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7023                                    PAGE_SIZE - len, 1);
7024                 len = strlen(buf);
7025                 if (PAGE_SIZE - len)
7026                         buf[len++] = '\n';
7027
7028                 ofs += 16;
7029                 size -= min(size, 16U);
7030         }
7031
7032         return len;
7033 }
7034
7035 static ssize_t store_measurement(struct device *d,
7036                                  struct device_attribute *attr,
7037                                  const char *buf, size_t count)
7038 {
7039         struct iwl_priv *priv = dev_get_drvdata(d);
7040         struct ieee80211_measurement_params params = {
7041                 .channel = le16_to_cpu(priv->active_rxon.channel),
7042                 .start_time = cpu_to_le64(priv->last_tsf),
7043                 .duration = cpu_to_le16(1),
7044         };
7045         u8 type = IWL_MEASURE_BASIC;
7046         u8 buffer[32];
7047         u8 channel;
7048
7049         if (count) {
7050                 char *p = buffer;
7051                 strncpy(buffer, buf, min(sizeof(buffer), count));
7052                 channel = simple_strtoul(p, NULL, 0);
7053                 if (channel)
7054                         params.channel = channel;
7055
7056                 p = buffer;
7057                 while (*p && *p != ' ')
7058                         p++;
7059                 if (*p)
7060                         type = simple_strtoul(p + 1, NULL, 0);
7061         }
7062
7063         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7064                        "channel %d (for '%s')\n", type, params.channel, buf);
7065         iwl4965_get_measurement(priv, &params, type);
7066
7067         return count;
7068 }
7069
7070 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7071                    show_measurement, store_measurement);
7072 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7073
7074 static ssize_t store_retry_rate(struct device *d,
7075                                 struct device_attribute *attr,
7076                                 const char *buf, size_t count)
7077 {
7078         struct iwl_priv *priv = dev_get_drvdata(d);
7079
7080         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7081         if (priv->retry_rate <= 0)
7082                 priv->retry_rate = 1;
7083
7084         return count;
7085 }
7086
7087 static ssize_t show_retry_rate(struct device *d,
7088                                struct device_attribute *attr, char *buf)
7089 {
7090         struct iwl_priv *priv = dev_get_drvdata(d);
7091         return sprintf(buf, "%d", priv->retry_rate);
7092 }
7093
7094 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7095                    store_retry_rate);
7096
7097 static ssize_t store_power_level(struct device *d,
7098                                  struct device_attribute *attr,
7099                                  const char *buf, size_t count)
7100 {
7101         struct iwl_priv *priv = dev_get_drvdata(d);
7102         int rc;
7103         int mode;
7104
7105         mode = simple_strtoul(buf, NULL, 0);
7106         mutex_lock(&priv->mutex);
7107
7108         if (!iwl_is_ready(priv)) {
7109                 rc = -EAGAIN;
7110                 goto out;
7111         }
7112
7113         rc = iwl_power_set_user_mode(priv, mode);
7114         if (rc) {
7115                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
7116                 goto out;
7117         }
7118         rc = count;
7119
7120  out:
7121         mutex_unlock(&priv->mutex);
7122         return rc;
7123 }
7124
7125 #define MAX_WX_STRING 80
7126
7127 /* Values are in microsecond */
7128 static const s32 timeout_duration[] = {
7129         350000,
7130         250000,
7131         75000,
7132         37000,
7133         25000,
7134 };
7135 static const s32 period_duration[] = {
7136         400000,
7137         700000,
7138         1000000,
7139         1000000,
7140         1000000
7141 };
7142
7143 static ssize_t show_power_level(struct device *d,
7144                                 struct device_attribute *attr, char *buf)
7145 {
7146         struct iwl_priv *priv = dev_get_drvdata(d);
7147         int level = priv->power_data.power_mode;
7148         char *p = buf;
7149
7150         p += sprintf(p, "%d ", level);
7151         switch (level) {
7152         case IWL_POWER_MODE_CAM:
7153         case IWL_POWER_AC:
7154                 p += sprintf(p, "(AC)");
7155                 break;
7156         case IWL_POWER_BATTERY:
7157                 p += sprintf(p, "(BATTERY)");
7158                 break;
7159         default:
7160                 p += sprintf(p,
7161                              "(Timeout %dms, Period %dms)",
7162                              timeout_duration[level - 1] / 1000,
7163                              period_duration[level - 1] / 1000);
7164         }
7165 /*
7166         if (!(priv->power_mode & IWL_POWER_ENABLED))
7167                 p += sprintf(p, " OFF\n");
7168         else
7169                 p += sprintf(p, " \n");
7170 */
7171         p += sprintf(p, " \n");
7172         return (p - buf + 1);
7173 }
7174
7175 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7176                    store_power_level);
7177
7178 static ssize_t show_channels(struct device *d,
7179                              struct device_attribute *attr, char *buf)
7180 {
7181         /* all this shit doesn't belong into sysfs anyway */
7182         return 0;
7183 }
7184
7185 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7186
7187 static ssize_t show_statistics(struct device *d,
7188                                struct device_attribute *attr, char *buf)
7189 {
7190         struct iwl_priv *priv = dev_get_drvdata(d);
7191         u32 size = sizeof(struct iwl4965_notif_statistics);
7192         u32 len = 0, ofs = 0;
7193         u8 *data = (u8 *) & priv->statistics;
7194         int rc = 0;
7195
7196         if (!iwl_is_alive(priv))
7197                 return -EAGAIN;
7198
7199         mutex_lock(&priv->mutex);
7200         rc = iwl_send_statistics_request(priv, 0);
7201         mutex_unlock(&priv->mutex);
7202
7203         if (rc) {
7204                 len = sprintf(buf,
7205                               "Error sending statistics request: 0x%08X\n", rc);
7206                 return len;
7207         }
7208
7209         while (size && (PAGE_SIZE - len)) {
7210                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7211                                    PAGE_SIZE - len, 1);
7212                 len = strlen(buf);
7213                 if (PAGE_SIZE - len)
7214                         buf[len++] = '\n';
7215
7216                 ofs += 16;
7217                 size -= min(size, 16U);
7218         }
7219
7220         return len;
7221 }
7222
7223 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7224
7225 static ssize_t show_antenna(struct device *d,
7226                             struct device_attribute *attr, char *buf)
7227 {
7228         struct iwl_priv *priv = dev_get_drvdata(d);
7229
7230         if (!iwl_is_alive(priv))
7231                 return -EAGAIN;
7232
7233         return sprintf(buf, "%d\n", priv->antenna);
7234 }
7235
7236 static ssize_t store_antenna(struct device *d,
7237                              struct device_attribute *attr,
7238                              const char *buf, size_t count)
7239 {
7240         int ant;
7241         struct iwl_priv *priv = dev_get_drvdata(d);
7242
7243         if (count == 0)
7244                 return 0;
7245
7246         if (sscanf(buf, "%1i", &ant) != 1) {
7247                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7248                 return count;
7249         }
7250
7251         if ((ant >= 0) && (ant <= 2)) {
7252                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7253                 priv->antenna = (enum iwl4965_antenna)ant;
7254         } else
7255                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7256
7257
7258         return count;
7259 }
7260
7261 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7262
7263 static ssize_t show_status(struct device *d,
7264                            struct device_attribute *attr, char *buf)
7265 {
7266         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7267         if (!iwl_is_alive(priv))
7268                 return -EAGAIN;
7269         return sprintf(buf, "0x%08x\n", (int)priv->status);
7270 }
7271
7272 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7273
7274 static ssize_t dump_error_log(struct device *d,
7275                               struct device_attribute *attr,
7276                               const char *buf, size_t count)
7277 {
7278         char *p = (char *)buf;
7279
7280         if (p[0] == '1')
7281                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7282
7283         return strnlen(buf, count);
7284 }
7285
7286 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7287
7288 static ssize_t dump_event_log(struct device *d,
7289                               struct device_attribute *attr,
7290                               const char *buf, size_t count)
7291 {
7292         char *p = (char *)buf;
7293
7294         if (p[0] == '1')
7295                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7296
7297         return strnlen(buf, count);
7298 }
7299
7300 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7301
7302 /*****************************************************************************
7303  *
7304  * driver setup and teardown
7305  *
7306  *****************************************************************************/
7307
7308 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7309 {
7310         priv->workqueue = create_workqueue(DRV_NAME);
7311
7312         init_waitqueue_head(&priv->wait_command_queue);
7313
7314         INIT_WORK(&priv->up, iwl4965_bg_up);
7315         INIT_WORK(&priv->restart, iwl4965_bg_restart);
7316         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7317         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7318         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7319         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7320         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7321         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7322         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7323         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7324         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7325         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7326
7327         iwl4965_hw_setup_deferred_work(priv);
7328
7329         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7330                      iwl4965_irq_tasklet, (unsigned long)priv);
7331 }
7332
7333 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7334 {
7335         iwl4965_hw_cancel_deferred_work(priv);
7336
7337         cancel_delayed_work_sync(&priv->init_alive_start);
7338         cancel_delayed_work(&priv->scan_check);
7339         cancel_delayed_work(&priv->alive_start);
7340         cancel_delayed_work(&priv->post_associate);
7341         cancel_work_sync(&priv->beacon_update);
7342 }
7343
7344 static struct attribute *iwl4965_sysfs_entries[] = {
7345         &dev_attr_antenna.attr,
7346         &dev_attr_channels.attr,
7347         &dev_attr_dump_errors.attr,
7348         &dev_attr_dump_events.attr,
7349         &dev_attr_flags.attr,
7350         &dev_attr_filter_flags.attr,
7351 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7352         &dev_attr_measurement.attr,
7353 #endif
7354         &dev_attr_power_level.attr,
7355         &dev_attr_retry_rate.attr,
7356         &dev_attr_rs_window.attr,
7357         &dev_attr_statistics.attr,
7358         &dev_attr_status.attr,
7359         &dev_attr_temperature.attr,
7360         &dev_attr_tx_power.attr,
7361
7362         NULL
7363 };
7364
7365 static struct attribute_group iwl4965_attribute_group = {
7366         .name = NULL,           /* put in device directory */
7367         .attrs = iwl4965_sysfs_entries,
7368 };
7369
7370 static struct ieee80211_ops iwl4965_hw_ops = {
7371         .tx = iwl4965_mac_tx,
7372         .start = iwl4965_mac_start,
7373         .stop = iwl4965_mac_stop,
7374         .add_interface = iwl4965_mac_add_interface,
7375         .remove_interface = iwl4965_mac_remove_interface,
7376         .config = iwl4965_mac_config,
7377         .config_interface = iwl4965_mac_config_interface,
7378         .configure_filter = iwl4965_configure_filter,
7379         .set_key = iwl4965_mac_set_key,
7380         .update_tkip_key = iwl4965_mac_update_tkip_key,
7381         .get_stats = iwl4965_mac_get_stats,
7382         .get_tx_stats = iwl4965_mac_get_tx_stats,
7383         .conf_tx = iwl4965_mac_conf_tx,
7384         .get_tsf = iwl4965_mac_get_tsf,
7385         .reset_tsf = iwl4965_mac_reset_tsf,
7386         .beacon_update = iwl4965_mac_beacon_update,
7387         .bss_info_changed = iwl4965_bss_info_changed,
7388 #ifdef CONFIG_IWL4965_HT
7389         .ampdu_action = iwl4965_mac_ampdu_action,
7390 #endif  /* CONFIG_IWL4965_HT */
7391         .hw_scan = iwl4965_mac_hw_scan
7392 };
7393
7394 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7395 {
7396         int err = 0;
7397         struct iwl_priv *priv;
7398         struct ieee80211_hw *hw;
7399         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7400         unsigned long flags;
7401         DECLARE_MAC_BUF(mac);
7402
7403         /************************
7404          * 1. Allocating HW data
7405          ************************/
7406
7407         /* Disabling hardware scan means that mac80211 will perform scans
7408          * "the hard way", rather than using device's scan. */
7409         if (cfg->mod_params->disable_hw_scan) {
7410                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7411                 iwl4965_hw_ops.hw_scan = NULL;
7412         }
7413
7414         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7415         if (!hw) {
7416                 err = -ENOMEM;
7417                 goto out;
7418         }
7419         priv = hw->priv;
7420         /* At this point both hw and priv are allocated. */
7421
7422         SET_IEEE80211_DEV(hw, &pdev->dev);
7423
7424         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7425         priv->cfg = cfg;
7426         priv->pci_dev = pdev;
7427
7428 #ifdef CONFIG_IWLWIFI_DEBUG
7429         iwl_debug_level = priv->cfg->mod_params->debug;
7430         atomic_set(&priv->restrict_refcnt, 0);
7431 #endif
7432
7433         /**************************
7434          * 2. Initializing PCI bus
7435          **************************/
7436         if (pci_enable_device(pdev)) {
7437                 err = -ENODEV;
7438                 goto out_ieee80211_free_hw;
7439         }
7440
7441         pci_set_master(pdev);
7442
7443         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7444         if (!err)
7445                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7446                 if (err) {
7447                         printk(KERN_WARNING DRV_NAME
7448                                 ": No suitable DMA available.\n");
7449                         goto out_pci_disable_device;
7450         }
7451
7452         err = pci_request_regions(pdev, DRV_NAME);
7453         if (err)
7454                 goto out_pci_disable_device;
7455
7456         pci_set_drvdata(pdev, priv);
7457
7458         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7459          * PCI Tx retries from interfering with C3 CPU state */
7460         pci_write_config_byte(pdev, 0x41, 0x00);
7461
7462         /***********************
7463          * 3. Read REV register
7464          ***********************/
7465         priv->hw_base = pci_iomap(pdev, 0, 0);
7466         if (!priv->hw_base) {
7467                 err = -ENODEV;
7468                 goto out_pci_release_regions;
7469         }
7470
7471         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7472                 (unsigned long long) pci_resource_len(pdev, 0));
7473         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7474
7475         printk(KERN_INFO DRV_NAME
7476                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7477
7478         /*****************
7479          * 4. Read EEPROM
7480          *****************/
7481         /* nic init */
7482         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7483                 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7484
7485         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7486         err = iwl_poll_bit(priv, CSR_GP_CNTRL,
7487                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7488                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7489         if (err < 0) {
7490                 IWL_DEBUG_INFO("Failed to init the card\n");
7491                 goto out_iounmap;
7492         }
7493         /* Read the EEPROM */
7494         err = iwl_eeprom_init(priv);
7495         if (err) {
7496                 IWL_ERROR("Unable to init EEPROM\n");
7497                 goto out_iounmap;
7498         }
7499         /* MAC Address location in EEPROM same for 3945/4965 */
7500         iwl_eeprom_get_mac(priv, priv->mac_addr);
7501         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7502         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7503
7504         /************************
7505          * 5. Setup HW constants
7506          ************************/
7507         /* Device-specific setup */
7508         if (priv->cfg->ops->lib->set_hw_params(priv)) {
7509                 IWL_ERROR("failed to set hw parameters\n");
7510                 goto out_free_eeprom;
7511         }
7512
7513         /*******************
7514          * 6. Setup hw/priv
7515          *******************/
7516
7517         err = iwl_setup(priv);
7518         if (err)
7519                 goto out_unset_hw_params;
7520         /* At this point both hw and priv are initialized. */
7521
7522         /**********************************
7523          * 7. Initialize module parameters
7524          **********************************/
7525
7526         /* Disable radio (SW RF KILL) via parameter when loading driver */
7527         if (priv->cfg->mod_params->disable) {
7528                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7529                 IWL_DEBUG_INFO("Radio disabled.\n");
7530         }
7531
7532         if (priv->cfg->mod_params->enable_qos)
7533                 priv->qos_data.qos_enable = 1;
7534
7535         /********************
7536          * 8. Setup services
7537          ********************/
7538         spin_lock_irqsave(&priv->lock, flags);
7539         iwl4965_disable_interrupts(priv);
7540         spin_unlock_irqrestore(&priv->lock, flags);
7541
7542         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7543         if (err) {
7544                 IWL_ERROR("failed to create sysfs device attributes\n");
7545                 goto out_unset_hw_params;
7546         }
7547
7548         err = iwl_dbgfs_register(priv, DRV_NAME);
7549         if (err) {
7550                 IWL_ERROR("failed to create debugfs files\n");
7551                 goto out_remove_sysfs;
7552         }
7553
7554         iwl4965_setup_deferred_work(priv);
7555         iwl4965_setup_rx_handlers(priv);
7556
7557         /********************
7558          * 9. Conclude
7559          ********************/
7560         pci_save_state(pdev);
7561         pci_disable_device(pdev);
7562
7563         /* notify iwlcore to init */
7564         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7565         return 0;
7566
7567  out_remove_sysfs:
7568         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7569  out_unset_hw_params:
7570         iwl4965_unset_hw_params(priv);
7571  out_free_eeprom:
7572         iwl_eeprom_free(priv);
7573  out_iounmap:
7574         pci_iounmap(pdev, priv->hw_base);
7575  out_pci_release_regions:
7576         pci_release_regions(pdev);
7577         pci_set_drvdata(pdev, NULL);
7578  out_pci_disable_device:
7579         pci_disable_device(pdev);
7580  out_ieee80211_free_hw:
7581         ieee80211_free_hw(priv->hw);
7582  out:
7583         return err;
7584 }
7585
7586 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
7587 {
7588         struct iwl_priv *priv = pci_get_drvdata(pdev);
7589         struct list_head *p, *q;
7590         int i;
7591         unsigned long flags;
7592
7593         if (!priv)
7594                 return;
7595
7596         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7597
7598         if (priv->mac80211_registered) {
7599                 ieee80211_unregister_hw(priv->hw);
7600                 priv->mac80211_registered = 0;
7601         }
7602
7603         set_bit(STATUS_EXIT_PENDING, &priv->status);
7604
7605         iwl4965_down(priv);
7606
7607         /* make sure we flush any pending irq or
7608          * tasklet for the driver
7609          */
7610         spin_lock_irqsave(&priv->lock, flags);
7611         iwl4965_disable_interrupts(priv);
7612         spin_unlock_irqrestore(&priv->lock, flags);
7613
7614         iwl_synchronize_irq(priv);
7615
7616         /* Free MAC hash list for ADHOC */
7617         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
7618                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
7619                         list_del(p);
7620                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
7621                 }
7622         }
7623
7624         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
7625         iwl_dbgfs_unregister(priv);
7626         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7627
7628         iwl4965_dealloc_ucode_pci(priv);
7629
7630         if (priv->rxq.bd)
7631                 iwl4965_rx_queue_free(priv, &priv->rxq);
7632         iwl4965_hw_txq_ctx_free(priv);
7633
7634         iwl4965_unset_hw_params(priv);
7635         iwlcore_clear_stations_table(priv);
7636         iwl_eeprom_free(priv);
7637
7638
7639         /*netif_stop_queue(dev); */
7640         flush_workqueue(priv->workqueue);
7641
7642         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
7643          * priv->workqueue... so we can't take down the workqueue
7644          * until now... */
7645         destroy_workqueue(priv->workqueue);
7646         priv->workqueue = NULL;
7647
7648         pci_iounmap(pdev, priv->hw_base);
7649         pci_release_regions(pdev);
7650         pci_disable_device(pdev);
7651         pci_set_drvdata(pdev, NULL);
7652
7653         iwl_free_channel_map(priv);
7654         iwl4965_free_geos(priv);
7655
7656         if (priv->ibss_beacon)
7657                 dev_kfree_skb(priv->ibss_beacon);
7658
7659         ieee80211_free_hw(priv->hw);
7660 }
7661
7662 #ifdef CONFIG_PM
7663
7664 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7665 {
7666         struct iwl_priv *priv = pci_get_drvdata(pdev);
7667
7668         if (priv->is_open) {
7669                 set_bit(STATUS_IN_SUSPEND, &priv->status);
7670                 iwl4965_mac_stop(priv->hw);
7671                 priv->is_open = 1;
7672         }
7673
7674         pci_set_power_state(pdev, PCI_D3hot);
7675
7676         return 0;
7677 }
7678
7679 static int iwl4965_pci_resume(struct pci_dev *pdev)
7680 {
7681         struct iwl_priv *priv = pci_get_drvdata(pdev);
7682
7683         pci_set_power_state(pdev, PCI_D0);
7684
7685         if (priv->is_open)
7686                 iwl4965_mac_start(priv->hw);
7687
7688         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7689         return 0;
7690 }
7691
7692 #endif /* CONFIG_PM */
7693
7694 /*****************************************************************************
7695  *
7696  * driver and module entry point
7697  *
7698  *****************************************************************************/
7699
7700 /* Hardware specific file defines the PCI IDs table for that hardware module */
7701 static struct pci_device_id iwl_hw_card_ids[] = {
7702         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
7703         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
7704         {0}
7705 };
7706 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
7707
7708 static struct pci_driver iwl_driver = {
7709         .name = DRV_NAME,
7710         .id_table = iwl_hw_card_ids,
7711         .probe = iwl4965_pci_probe,
7712         .remove = __devexit_p(iwl4965_pci_remove),
7713 #ifdef CONFIG_PM
7714         .suspend = iwl4965_pci_suspend,
7715         .resume = iwl4965_pci_resume,
7716 #endif
7717 };
7718
7719 static int __init iwl4965_init(void)
7720 {
7721
7722         int ret;
7723         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7724         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7725
7726         ret = iwl4965_rate_control_register();
7727         if (ret) {
7728                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
7729                 return ret;
7730         }
7731
7732         ret = pci_register_driver(&iwl_driver);
7733         if (ret) {
7734                 IWL_ERROR("Unable to initialize PCI module\n");
7735                 goto error_register;
7736         }
7737 #ifdef CONFIG_IWLWIFI_DEBUG
7738         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
7739         if (ret) {
7740                 IWL_ERROR("Unable to create driver sysfs file\n");
7741                 goto error_debug;
7742         }
7743 #endif
7744
7745         return ret;
7746
7747 #ifdef CONFIG_IWLWIFI_DEBUG
7748 error_debug:
7749         pci_unregister_driver(&iwl_driver);
7750 #endif
7751 error_register:
7752         iwl4965_rate_control_unregister();
7753         return ret;
7754 }
7755
7756 static void __exit iwl4965_exit(void)
7757 {
7758 #ifdef CONFIG_IWLWIFI_DEBUG
7759         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
7760 #endif
7761         pci_unregister_driver(&iwl_driver);
7762         iwl4965_rate_control_unregister();
7763 }
7764
7765 module_exit(iwl4965_exit);
7766 module_init(iwl4965_init);