drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 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  *  Intel Linux Wireless <ilw@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/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #define DRV_NAME        "iwlagn"
  48
  49 #include "iwl-eeprom.h"
  50 #include "iwl-dev.h"
  51 #include "iwl-core.h"
  52 #include "iwl-io.h"
  53 #include "iwl-helpers.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-calib.h"
  56
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  76 #define VS "s"
  77 #else
  78 #define VS
  79 #endif
  80
  81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("iwl4965");
  89
  90 /*************** STATION TABLE MANAGEMENT ****
  91  * mac80211 should be examined to determine if sta_info is duplicating
  92  * the functionality provided here
  93  */
  94
  95 /**************************************************************/
  96
  97 /**
  98  * iwl_commit_rxon - commit staging_rxon to hardware
  99  *
 100  * The RXON command in staging_rxon is committed to the hardware and
 101  * the active_rxon structure is updated with the new data.  This
 102  * function correctly transitions out of the RXON_ASSOC_MSK state if
 103  * a HW tune is required based on the RXON structure changes.
 104  */
 105 int iwl_commit_rxon(struct iwl_priv *priv)
 106 {
 107         /* cast away the const for active_rxon in this function */
 108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 109         int ret;
 110         bool new_assoc =
 111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 112
 113         if (!iwl_is_alive(priv))
 114                 return -EBUSY;
 115
 116         /* always get timestamp with Rx frame */
 117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 118         /* allow CTS-to-self if possible. this is relevant only for
 119          * 5000, but will not damage 4965 */
 120         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 121
 122         ret = iwl_check_rxon_cmd(priv);
 123         if (ret) {
 124                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 125                 return -EINVAL;
 126         }
 127
 128         /* If we don't need to send a full RXON, we can use
 129          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 130          * and other flags for the current radio configuration. */
 131         if (!iwl_full_rxon_required(priv)) {
 132                 ret = iwl_send_rxon_assoc(priv);
 133                 if (ret) {
 134                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 135                         return ret;
 136                 }
 137
 138                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 139                 return 0;
 140         }
 141
 142         /* station table will be cleared */
 143         priv->assoc_station_added = 0;
 144
 145         /* If we are currently associated and the new config requires
 146          * an RXON_ASSOC and the new config wants the associated mask enabled,
 147          * we must clear the associated from the active configuration
 148          * before we apply the new config */
 149         if (iwl_is_associated(priv) && new_assoc) {
 150                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 151                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 152
 153                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 154                                       sizeof(struct iwl_rxon_cmd),
 155                                       &priv->active_rxon);
 156
 157                 /* If the mask clearing failed then we set
 158                  * active_rxon back to what it was previously */
 159                 if (ret) {
 160                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 161                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 162                         return ret;
 163                 }
 164         }
 165
 166         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 167                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 168                        "* channel = %d\n"
 169                        "* bssid = %pM\n",
 170                        (new_assoc ? "" : "out"),
 171                        le16_to_cpu(priv->staging_rxon.channel),
 172                        priv->staging_rxon.bssid_addr);
 173
 174         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 175
 176         /* Apply the new configuration
 177          * RXON unassoc clears the station table in uCode, send it before
 178          * we add the bcast station. If assoc bit is set, we will send RXON
 179          * after having added the bcast and bssid station.
 180          */
 181         if (!new_assoc) {
 182                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 183                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 184                 if (ret) {
 185                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 186                         return ret;
 187                 }
 188                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 189         }
 190
 191         priv->cfg->ops->smgmt->clear_station_table(priv);
 192
 193         if (!priv->error_recovering)
 194                 priv->start_calib = 0;
 195
 196         /* Add the broadcast address so we can send broadcast frames */
 197         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 198                                                 IWL_INVALID_STATION) {
 199                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 200                 return -EIO;
 201         }
 202
 203         /* If we have set the ASSOC_MSK and we are in BSS mode then
 204          * add the IWL_AP_ID to the station rate table */
 205         if (new_assoc) {
 206                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 207                         ret = iwl_rxon_add_station(priv,
 208                                            priv->active_rxon.bssid_addr, 1);
 209                         if (ret == IWL_INVALID_STATION) {
 210                                 IWL_ERR(priv,
 211                                         "Error adding AP address for TX.\n");
 212                                 return -EIO;
 213                         }
 214                         priv->assoc_station_added = 1;
 215                         if (priv->default_wep_key &&
 216                             iwl_send_static_wepkey_cmd(priv, 0))
 217                                 IWL_ERR(priv,
 218                                         "Could not send WEP static key.\n");
 219                 }
 220
 221                 /* Apply the new configuration
 222                  * RXON assoc doesn't clear the station table in uCode,
 223                  */
 224                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 225                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 226                 if (ret) {
 227                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 228                         return ret;
 229                 }
 230                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 231         }
 232
 233         iwl_init_sensitivity(priv);
 234
 235         /* If we issue a new RXON command which required a tune then we must
 236          * send a new TXPOWER command or we won't be able to Tx any frames */
 237         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 238         if (ret) {
 239                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 240                 return ret;
 241         }
 242
 243         return 0;
 244 }
 245
 246 void iwl_update_chain_flags(struct iwl_priv *priv)
 247 {
 248
 249         if (priv->cfg->ops->hcmd->set_rxon_chain)
 250                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 251         iwlcore_commit_rxon(priv);
 252 }
 253
 254 static void iwl_clear_free_frames(struct iwl_priv *priv)
 255 {
 256         struct list_head *element;
 257
 258         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 259                        priv->frames_count);
 260
 261         while (!list_empty(&priv->free_frames)) {
 262                 element = priv->free_frames.next;
 263                 list_del(element);
 264                 kfree(list_entry(element, struct iwl_frame, list));
 265                 priv->frames_count--;
 266         }
 267
 268         if (priv->frames_count) {
 269                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 270                             priv->frames_count);
 271                 priv->frames_count = 0;
 272         }
 273 }
 274
 275 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 276 {
 277         struct iwl_frame *frame;
 278         struct list_head *element;
 279         if (list_empty(&priv->free_frames)) {
 280                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 281                 if (!frame) {
 282                         IWL_ERR(priv, "Could not allocate frame!\n");
 283                         return NULL;
 284                 }
 285
 286                 priv->frames_count++;
 287                 return frame;
 288         }
 289
 290         element = priv->free_frames.next;
 291         list_del(element);
 292         return list_entry(element, struct iwl_frame, list);
 293 }
 294
 295 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 296 {
 297         memset(frame, 0, sizeof(*frame));
 298         list_add(&frame->list, &priv->free_frames);
 299 }
 300
 301 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 302                                           struct ieee80211_hdr *hdr,
 303                                           int left)
 304 {
 305         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 306             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 307              (priv->iw_mode != NL80211_IFTYPE_AP)))
 308                 return 0;
 309
 310         if (priv->ibss_beacon->len > left)
 311                 return 0;
 312
 313         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 314
 315         return priv->ibss_beacon->len;
 316 }
 317
 318 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 319                                        struct iwl_frame *frame, u8 rate)
 320 {
 321         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 322         unsigned int frame_size;
 323
 324         tx_beacon_cmd = &frame->u.beacon;
 325         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 326
 327         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 328         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 329
 330         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 331                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 332
 333         BUG_ON(frame_size > MAX_MPDU_SIZE);
 334         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 335
 336         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 337                 tx_beacon_cmd->tx.rate_n_flags =
 338                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 339         else
 340                 tx_beacon_cmd->tx.rate_n_flags =
 341                         iwl_hw_set_rate_n_flags(rate, 0);
 342
 343         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 344                                      TX_CMD_FLG_TSF_MSK |
 345                                      TX_CMD_FLG_STA_RATE_MSK;
 346
 347         return sizeof(*tx_beacon_cmd) + frame_size;
 348 }
 349 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 350 {
 351         struct iwl_frame *frame;
 352         unsigned int frame_size;
 353         int rc;
 354         u8 rate;
 355
 356         frame = iwl_get_free_frame(priv);
 357
 358         if (!frame) {
 359                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 360                           "command.\n");
 361                 return -ENOMEM;
 362         }
 363
 364         rate = iwl_rate_get_lowest_plcp(priv);
 365
 366         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 367
 368         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 369                               &frame->u.cmd[0]);
 370
 371         iwl_free_frame(priv, frame);
 372
 373         return rc;
 374 }
 375
 376 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 377 {
 378         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 379
 380         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 381         if (sizeof(dma_addr_t) > sizeof(u32))
 382                 addr |=
 383                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 384
 385         return addr;
 386 }
 387
 388 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 389 {
 390         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 391
 392         return le16_to_cpu(tb->hi_n_len) >> 4;
 393 }
 394
 395 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 396                                   dma_addr_t addr, u16 len)
 397 {
 398         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 399         u16 hi_n_len = len << 4;
 400
 401         put_unaligned_le32(addr, &tb->lo);
 402         if (sizeof(dma_addr_t) > sizeof(u32))
 403                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 404
 405         tb->hi_n_len = cpu_to_le16(hi_n_len);
 406
 407         tfd->num_tbs = idx + 1;
 408 }
 409
 410 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 411 {
 412         return tfd->num_tbs & 0x1f;
 413 }
 414
 415 /**
 416  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 417  * @priv - driver private data
 418  * @txq - tx queue
 419  *
 420  * Does NOT advance any TFD circular buffer read/write indexes
 421  * Does NOT free the TFD itself (which is within circular buffer)
 422  */
 423 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 424 {
 425         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 426         struct iwl_tfd *tfd;
 427         struct pci_dev *dev = priv->pci_dev;
 428         int index = txq->q.read_ptr;
 429         int i;
 430         int num_tbs;
 431
 432         tfd = &tfd_tmp[index];
 433
 434         /* Sanity check on number of chunks */
 435         num_tbs = iwl_tfd_get_num_tbs(tfd);
 436
 437         if (num_tbs >= IWL_NUM_OF_TBS) {
 438                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 439                 /* @todo issue fatal error, it is quite serious situation */
 440                 return;
 441         }
 442
 443         /* Unmap tx_cmd */
 444         if (num_tbs)
 445                 pci_unmap_single(dev,
 446                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
 447                                 pci_unmap_len(&txq->cmd[index]->meta, len),
 448                                 PCI_DMA_BIDIRECTIONAL);
 449
 450         /* Unmap chunks, if any. */
 451         for (i = 1; i < num_tbs; i++) {
 452                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 453                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 454
 455                 if (txq->txb) {
 456                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 457                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 458                 }
 459         }
 460 }
 461
 462 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 463                                  struct iwl_tx_queue *txq,
 464                                  dma_addr_t addr, u16 len,
 465                                  u8 reset, u8 pad)
 466 {
 467         struct iwl_queue *q;
 468         struct iwl_tfd *tfd, *tfd_tmp;
 469         u32 num_tbs;
 470
 471         q = &txq->q;
 472         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 473         tfd = &tfd_tmp[q->write_ptr];
 474
 475         if (reset)
 476                 memset(tfd, 0, sizeof(*tfd));
 477
 478         num_tbs = iwl_tfd_get_num_tbs(tfd);
 479
 480         /* Each TFD can point to a maximum 20 Tx buffers */
 481         if (num_tbs >= IWL_NUM_OF_TBS) {
 482                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 483                           IWL_NUM_OF_TBS);
 484                 return -EINVAL;
 485         }
 486
 487         BUG_ON(addr & ~DMA_BIT_MASK(36));
 488         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 489                 IWL_ERR(priv, "Unaligned address = %llx\n",
 490                           (unsigned long long)addr);
 491
 492         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 493
 494         return 0;
 495 }
 496
 497 /*
 498  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 499  * given Tx queue, and enable the DMA channel used for that queue.
 500  *
 501  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 502  * channels supported in hardware.
 503  */
 504 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 505                          struct iwl_tx_queue *txq)
 506 {
 507         int ret;
 508         unsigned long flags;
 509         int txq_id = txq->q.id;
 510
 511         spin_lock_irqsave(&priv->lock, flags);
 512         ret = iwl_grab_nic_access(priv);
 513         if (ret) {
 514                 spin_unlock_irqrestore(&priv->lock, flags);
 515                 return ret;
 516         }
 517
 518         /* Circular buffer (TFD queue in DRAM) physical base address */
 519         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 520                              txq->q.dma_addr >> 8);
 521
 522         iwl_release_nic_access(priv);
 523         spin_unlock_irqrestore(&priv->lock, flags);
 524
 525         return 0;
 526 }
 527
 528
 529 /******************************************************************************
 530  *
 531  * Misc. internal state and helper functions
 532  *
 533  ******************************************************************************/
 534
 535 #define MAX_UCODE_BEACON_INTERVAL       4096
 536
 537 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 538 {
 539         u16 new_val = 0;
 540         u16 beacon_factor = 0;
 541
 542         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 543                                         / MAX_UCODE_BEACON_INTERVAL;
 544         new_val = beacon_val / beacon_factor;
 545
 546         if (!new_val)
 547                 new_val = MAX_UCODE_BEACON_INTERVAL;
 548
 549         return new_val;
 550 }
 551
 552 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 553 {
 554         u64 tsf;
 555         s32 interval_tm, rem;
 556         unsigned long flags;
 557         struct ieee80211_conf *conf = NULL;
 558         u16 beacon_int = 0;
 559
 560         conf = ieee80211_get_hw_conf(priv->hw);
 561
 562         spin_lock_irqsave(&priv->lock, flags);
 563         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 564         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 565
 566         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 567                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 568                 priv->rxon_timing.atim_window = 0;
 569         } else {
 570                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 571
 572                 /* TODO: we need to get atim_window from upper stack
 573                  * for now we set to 0 */
 574                 priv->rxon_timing.atim_window = 0;
 575         }
 576
 577         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 578
 579         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 580         interval_tm = beacon_int * 1024;
 581         rem = do_div(tsf, interval_tm);
 582         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 583
 584         spin_unlock_irqrestore(&priv->lock, flags);
 585         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
 586                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 587                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 588                         le16_to_cpu(priv->rxon_timing.atim_window));
 589 }
 590
 591 /******************************************************************************
 592  *
 593  * Generic RX handler implementations
 594  *
 595  ******************************************************************************/
 596 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 597                                 struct iwl_rx_mem_buffer *rxb)
 598 {
 599         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 600         struct iwl_alive_resp *palive;
 601         struct delayed_work *pwork;
 602
 603         palive = &pkt->u.alive_frame;
 604
 605         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 606                        "0x%01X 0x%01X\n",
 607                        palive->is_valid, palive->ver_type,
 608                        palive->ver_subtype);
 609
 610         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 611                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 612                 memcpy(&priv->card_alive_init,
 613                        &pkt->u.alive_frame,
 614                        sizeof(struct iwl_init_alive_resp));
 615                 pwork = &priv->init_alive_start;
 616         } else {
 617                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 618                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 619                        sizeof(struct iwl_alive_resp));
 620                 pwork = &priv->alive_start;
 621         }
 622
 623         /* We delay the ALIVE response by 5ms to
 624          * give the HW RF Kill time to activate... */
 625         if (palive->is_valid == UCODE_VALID_OK)
 626                 queue_delayed_work(priv->workqueue, pwork,
 627                                    msecs_to_jiffies(5));
 628         else
 629                 IWL_WARN(priv, "uCode did not respond OK.\n");
 630 }
 631
 632 static void iwl_bg_beacon_update(struct work_struct *work)
 633 {
 634         struct iwl_priv *priv =
 635                 container_of(work, struct iwl_priv, beacon_update);
 636         struct sk_buff *beacon;
 637
 638         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 639         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 640
 641         if (!beacon) {
 642                 IWL_ERR(priv, "update beacon failed\n");
 643                 return;
 644         }
 645
 646         mutex_lock(&priv->mutex);
 647         /* new beacon skb is allocated every time; dispose previous.*/
 648         if (priv->ibss_beacon)
 649                 dev_kfree_skb(priv->ibss_beacon);
 650
 651         priv->ibss_beacon = beacon;
 652         mutex_unlock(&priv->mutex);
 653
 654         iwl_send_beacon_cmd(priv);
 655 }
 656
 657 /**
 658  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 659  *
 660  * This callback is provided in order to send a statistics request.
 661  *
 662  * This timer function is continually reset to execute within
 663  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 664  * was received.  We need to ensure we receive the statistics in order
 665  * to update the temperature used for calibrating the TXPOWER.
 666  */
 667 static void iwl_bg_statistics_periodic(unsigned long data)
 668 {
 669         struct iwl_priv *priv = (struct iwl_priv *)data;
 670
 671         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 672                 return;
 673
 674         /* dont send host command if rf-kill is on */
 675         if (!iwl_is_ready_rf(priv))
 676                 return;
 677
 678         iwl_send_statistics_request(priv, CMD_ASYNC);
 679 }
 680
 681 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 682                                 struct iwl_rx_mem_buffer *rxb)
 683 {
 684 #ifdef CONFIG_IWLWIFI_DEBUG
 685         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 686         struct iwl4965_beacon_notif *beacon =
 687                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 688         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 689
 690         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 691                 "tsf %d %d rate %d\n",
 692                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 693                 beacon->beacon_notify_hdr.failure_frame,
 694                 le32_to_cpu(beacon->ibss_mgr_status),
 695                 le32_to_cpu(beacon->high_tsf),
 696                 le32_to_cpu(beacon->low_tsf), rate);
 697 #endif
 698
 699         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 700             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 701                 queue_work(priv->workqueue, &priv->beacon_update);
 702 }
 703
 704 /* Handle notification from uCode that card's power state is changing
 705  * due to software, hardware, or critical temperature RFKILL */
 706 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 707                                     struct iwl_rx_mem_buffer *rxb)
 708 {
 709         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 710         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 711         unsigned long status = priv->status;
 712
 713         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 714                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 715                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 716
 717         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 718                      RF_CARD_DISABLED)) {
 719
 720                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 721                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 722
 723                 if (!iwl_grab_nic_access(priv)) {
 724                         iwl_write_direct32(
 725                                 priv, HBUS_TARG_MBX_C,
 726                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 727
 728                         iwl_release_nic_access(priv);
 729                 }
 730
 731                 if (!(flags & RXON_CARD_DISABLED)) {
 732                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 733                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 734                         if (!iwl_grab_nic_access(priv)) {
 735                                 iwl_write_direct32(
 736                                         priv, HBUS_TARG_MBX_C,
 737                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 738
 739                                 iwl_release_nic_access(priv);
 740                         }
 741                 }
 742
 743                 if (flags & RF_CARD_DISABLED) {
 744                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 745                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 746                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 747                         if (!iwl_grab_nic_access(priv))
 748                                 iwl_release_nic_access(priv);
 749                 }
 750         }
 751
 752         if (flags & HW_CARD_DISABLED)
 753                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 754         else
 755                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 756
 757
 758         if (flags & SW_CARD_DISABLED)
 759                 set_bit(STATUS_RF_KILL_SW, &priv->status);
 760         else
 761                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
 762
 763         if (!(flags & RXON_CARD_DISABLED))
 764                 iwl_scan_cancel(priv);
 765
 766         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 767              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
 768             (test_bit(STATUS_RF_KILL_SW, &status) !=
 769              test_bit(STATUS_RF_KILL_SW, &priv->status)))
 770                 queue_work(priv->workqueue, &priv->rf_kill);
 771         else
 772                 wake_up_interruptible(&priv->wait_command_queue);
 773 }
 774
 775 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 776 {
 777         int ret;
 778         unsigned long flags;
 779
 780         spin_lock_irqsave(&priv->lock, flags);
 781         ret = iwl_grab_nic_access(priv);
 782         if (ret)
 783                 goto err;
 784
 785         if (src == IWL_PWR_SRC_VAUX) {
 786                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 787                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 788                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 789                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 790         } else {
 791                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 792                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 793                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 794         }
 795
 796         iwl_release_nic_access(priv);
 797 err:
 798         spin_unlock_irqrestore(&priv->lock, flags);
 799         return ret;
 800 }
 801
 802 /**
 803  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 804  *
 805  * Setup the RX handlers for each of the reply types sent from the uCode
 806  * to the host.
 807  *
 808  * This function chains into the hardware specific files for them to setup
 809  * any hardware specific handlers as well.
 810  */
 811 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 812 {
 813         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 814         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 815         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 816         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 817         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 818             iwl_rx_pm_debug_statistics_notif;
 819         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 820
 821         /*
 822          * The same handler is used for both the REPLY to a discrete
 823          * statistics request from the host as well as for the periodic
 824          * statistics notifications (after received beacons) from the uCode.
 825          */
 826         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 827         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 828
 829         iwl_setup_spectrum_handlers(priv);
 830         iwl_setup_rx_scan_handlers(priv);
 831
 832         /* status change handler */
 833         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 834
 835         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 836             iwl_rx_missed_beacon_notif;
 837         /* Rx handlers */
 838         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 839         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 840         /* block ack */
 841         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 842         /* Set up hardware specific Rx handlers */
 843         priv->cfg->ops->lib->rx_handler_setup(priv);
 844 }
 845
 846 /**
 847  * iwl_rx_handle - Main entry function for receiving responses from uCode
 848  *
 849  * Uses the priv->rx_handlers callback function array to invoke
 850  * the appropriate handlers, including command responses,
 851  * frame-received notifications, and other notifications.
 852  */
 853 void iwl_rx_handle(struct iwl_priv *priv)
 854 {
 855         struct iwl_rx_mem_buffer *rxb;
 856         struct iwl_rx_packet *pkt;
 857         struct iwl_rx_queue *rxq = &priv->rxq;
 858         u32 r, i;
 859         int reclaim;
 860         unsigned long flags;
 861         u8 fill_rx = 0;
 862         u32 count = 8;
 863
 864         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 865          * buffer that the driver may process (last buffer filled by ucode). */
 866         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 867         i = rxq->read;
 868
 869         /* Rx interrupt, but nothing sent from uCode */
 870         if (i == r)
 871                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 872
 873         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
 874                 fill_rx = 1;
 875
 876         while (i != r) {
 877                 rxb = rxq->queue[i];
 878
 879                 /* If an RXB doesn't have a Rx queue slot associated with it,
 880                  * then a bug has been introduced in the queue refilling
 881                  * routines -- catch it here */
 882                 BUG_ON(rxb == NULL);
 883
 884                 rxq->queue[i] = NULL;
 885
 886                 dma_sync_single_range_for_cpu(
 887                                 &priv->pci_dev->dev, rxb->real_dma_addr,
 888                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
 889                                 priv->hw_params.rx_buf_size,
 890                                 PCI_DMA_FROMDEVICE);
 891                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 892
 893                 /* Reclaim a command buffer only if this packet is a response
 894                  *   to a (driver-originated) command.
 895                  * If the packet (e.g. Rx frame) originated from uCode,
 896                  *   there is no command buffer to reclaim.
 897                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 898                  *   but apparently a few don't get set; catch them here. */
 899                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 900                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 901                         (pkt->hdr.cmd != REPLY_RX) &&
 902                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 903                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 904                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 905                         (pkt->hdr.cmd != REPLY_TX);
 906
 907                 /* Based on type of command response or notification,
 908                  *   handle those that need handling via function in
 909                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 910                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 911                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 912                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 913                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 914                 } else {
 915                         /* No handling needed */
 916                         IWL_DEBUG_RX(priv,
 917                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 918                                 r, i, get_cmd_string(pkt->hdr.cmd),
 919                                 pkt->hdr.cmd);
 920                 }
 921
 922                 if (reclaim) {
 923                         /* Invoke any callbacks, transfer the skb to caller, and
 924                          * fire off the (possibly) blocking iwl_send_cmd()
 925                          * as we reclaim the driver command queue */
 926                         if (rxb && rxb->skb)
 927                                 iwl_tx_cmd_complete(priv, rxb);
 928                         else
 929                                 IWL_WARN(priv, "Claim null rxb?\n");
 930                 }
 931
 932                 /* For now we just don't re-use anything.  We can tweak this
 933                  * later to try and re-use notification packets and SKBs that
 934                  * fail to Rx correctly */
 935                 if (rxb->skb != NULL) {
 936                         priv->alloc_rxb_skb--;
 937                         dev_kfree_skb_any(rxb->skb);
 938                         rxb->skb = NULL;
 939                 }
 940
 941                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
 942                                  priv->hw_params.rx_buf_size + 256,
 943                                  PCI_DMA_FROMDEVICE);
 944                 spin_lock_irqsave(&rxq->lock, flags);
 945                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
 946                 spin_unlock_irqrestore(&rxq->lock, flags);
 947                 i = (i + 1) & RX_QUEUE_MASK;
 948                 /* If there are a lot of unused frames,
 949                  * restock the Rx queue so ucode wont assert. */
 950                 if (fill_rx) {
 951                         count++;
 952                         if (count >= 8) {
 953                                 priv->rxq.read = i;
 954                                 iwl_rx_queue_restock(priv);
 955                                 count = 0;
 956                         }
 957                 }
 958         }
 959
 960         /* Backtrack one entry */
 961         priv->rxq.read = i;
 962         iwl_rx_queue_restock(priv);
 963 }
 964
 965 /* call this function to flush any scheduled tasklet */
 966 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 967 {
 968         /* wait to make sure we flush pending tasklet*/
 969         synchronize_irq(priv->pci_dev->irq);
 970         tasklet_kill(&priv->irq_tasklet);
 971 }
 972
 973 static void iwl_error_recovery(struct iwl_priv *priv)
 974 {
 975         unsigned long flags;
 976
 977         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
 978                sizeof(priv->staging_rxon));
 979         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 980         iwlcore_commit_rxon(priv);
 981
 982         iwl_rxon_add_station(priv, priv->bssid, 1);
 983
 984         spin_lock_irqsave(&priv->lock, flags);
 985         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
 986         priv->error_recovering = 0;
 987         spin_unlock_irqrestore(&priv->lock, flags);
 988 }
 989
 990 static void iwl_irq_tasklet(struct iwl_priv *priv)
 991 {
 992         u32 inta, handled = 0;
 993         u32 inta_fh;
 994         unsigned long flags;
 995 #ifdef CONFIG_IWLWIFI_DEBUG
 996         u32 inta_mask;
 997 #endif
 998
 999         spin_lock_irqsave(&priv->lock, flags);
1000
1001         /* Ack/clear/reset pending uCode interrupts.
1002          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1003          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1004         inta = iwl_read32(priv, CSR_INT);
1005         iwl_write32(priv, CSR_INT, inta);
1006
1007         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1008          * Any new interrupts that happen after this, either while we're
1009          * in this tasklet, or later, will show up in next ISR/tasklet. */
1010         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1011         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1012
1013 #ifdef CONFIG_IWLWIFI_DEBUG
1014         if (priv->debug_level & IWL_DL_ISR) {
1015                 /* just for debug */
1016                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1017                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1018                               inta, inta_mask, inta_fh);
1019         }
1020 #endif
1021
1022         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1023          * atomic, make sure that inta covers all the interrupts that
1024          * we've discovered, even if FH interrupt came in just after
1025          * reading CSR_INT. */
1026         if (inta_fh & CSR49_FH_INT_RX_MASK)
1027                 inta |= CSR_INT_BIT_FH_RX;
1028         if (inta_fh & CSR49_FH_INT_TX_MASK)
1029                 inta |= CSR_INT_BIT_FH_TX;
1030
1031         /* Now service all interrupt bits discovered above. */
1032         if (inta & CSR_INT_BIT_HW_ERR) {
1033                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1034
1035                 /* Tell the device to stop sending interrupts */
1036                 iwl_disable_interrupts(priv);
1037
1038                 iwl_irq_handle_error(priv);
1039
1040                 handled |= CSR_INT_BIT_HW_ERR;
1041
1042                 spin_unlock_irqrestore(&priv->lock, flags);
1043
1044                 return;
1045         }
1046
1047 #ifdef CONFIG_IWLWIFI_DEBUG
1048         if (priv->debug_level & (IWL_DL_ISR)) {
1049                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1050                 if (inta & CSR_INT_BIT_SCD)
1051                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1052                                       "the frame/frames.\n");
1053
1054                 /* Alive notification via Rx interrupt will do the real work */
1055                 if (inta & CSR_INT_BIT_ALIVE)
1056                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1057         }
1058 #endif
1059         /* Safely ignore these bits for debug checks below */
1060         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1061
1062         /* HW RF KILL switch toggled */
1063         if (inta & CSR_INT_BIT_RF_KILL) {
1064                 int hw_rf_kill = 0;
1065                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1066                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1067                         hw_rf_kill = 1;
1068
1069                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1070                                 hw_rf_kill ? "disable radio" : "enable radio");
1071
1072                 /* driver only loads ucode once setting the interface up.
1073                  * the driver allows loading the ucode even if the radio
1074                  * is killed. Hence update the killswitch state here. The
1075                  * rfkill handler will care about restarting if needed.
1076                  */
1077                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1078                         if (hw_rf_kill)
1079                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1080                         else
1081                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1082                         queue_work(priv->workqueue, &priv->rf_kill);
1083                 }
1084
1085                 handled |= CSR_INT_BIT_RF_KILL;
1086         }
1087
1088         /* Chip got too hot and stopped itself */
1089         if (inta & CSR_INT_BIT_CT_KILL) {
1090                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1091                 handled |= CSR_INT_BIT_CT_KILL;
1092         }
1093
1094         /* Error detected by uCode */
1095         if (inta & CSR_INT_BIT_SW_ERR) {
1096                 IWL_ERR(priv, "Microcode SW error detected. "
1097                         " Restarting 0x%X.\n", inta);
1098                 iwl_irq_handle_error(priv);
1099                 handled |= CSR_INT_BIT_SW_ERR;
1100         }
1101
1102         /* uCode wakes up after power-down sleep */
1103         if (inta & CSR_INT_BIT_WAKEUP) {
1104                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1105                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1106                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1107                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1108                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1109                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1110                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1111                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1112
1113                 handled |= CSR_INT_BIT_WAKEUP;
1114         }
1115
1116         /* All uCode command responses, including Tx command responses,
1117          * Rx "responses" (frame-received notification), and other
1118          * notifications from uCode come through here*/
1119         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1120                 iwl_rx_handle(priv);
1121                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1122         }
1123
1124         if (inta & CSR_INT_BIT_FH_TX) {
1125                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1126                 handled |= CSR_INT_BIT_FH_TX;
1127                 /* FH finished to write, send event */
1128                 priv->ucode_write_complete = 1;
1129                 wake_up_interruptible(&priv->wait_command_queue);
1130         }
1131
1132         if (inta & ~handled)
1133                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1134
1135         if (inta & ~CSR_INI_SET_MASK) {
1136                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1137                          inta & ~CSR_INI_SET_MASK);
1138                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1139         }
1140
1141         /* Re-enable all interrupts */
1142         /* only Re-enable if diabled by irq */
1143         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1144                 iwl_enable_interrupts(priv);
1145
1146 #ifdef CONFIG_IWLWIFI_DEBUG
1147         if (priv->debug_level & (IWL_DL_ISR)) {
1148                 inta = iwl_read32(priv, CSR_INT);
1149                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1150                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1151                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1152                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1153         }
1154 #endif
1155         spin_unlock_irqrestore(&priv->lock, flags);
1156 }
1157
1158 /******************************************************************************
1159  *
1160  * uCode download functions
1161  *
1162  ******************************************************************************/
1163
1164 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1165 {
1166         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1167         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1168         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1169         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1170         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1171         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1172 }
1173
1174 static void iwl_nic_start(struct iwl_priv *priv)
1175 {
1176         /* Remove all resets to allow NIC to operate */
1177         iwl_write32(priv, CSR_RESET, 0);
1178 }
1179
1180
1181 /**
1182  * iwl_read_ucode - Read uCode images from disk file.
1183  *
1184  * Copy into buffers for card to fetch via bus-mastering
1185  */
1186 static int iwl_read_ucode(struct iwl_priv *priv)
1187 {
1188         struct iwl_ucode *ucode;
1189         int ret = -EINVAL, index;
1190         const struct firmware *ucode_raw;
1191         const char *name_pre = priv->cfg->fw_name_pre;
1192         const unsigned int api_max = priv->cfg->ucode_api_max;
1193         const unsigned int api_min = priv->cfg->ucode_api_min;
1194         char buf[25];
1195         u8 *src;
1196         size_t len;
1197         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1198
1199         /* Ask kernel firmware_class module to get the boot firmware off disk.
1200          * request_firmware() is synchronous, file is in memory on return. */
1201         for (index = api_max; index >= api_min; index--) {
1202                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1203                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1204                 if (ret < 0) {
1205                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1206                                   buf, ret);
1207                         if (ret == -ENOENT)
1208                                 continue;
1209                         else
1210                                 goto error;
1211                 } else {
1212                         if (index < api_max)
1213                                 IWL_ERR(priv, "Loaded firmware %s, "
1214                                         "which is deprecated. "
1215                                         "Please use API v%u instead.\n",
1216                                           buf, api_max);
1217
1218                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1219                                        buf, ucode_raw->size);
1220                         break;
1221                 }
1222         }
1223
1224         if (ret < 0)
1225                 goto error;
1226
1227         /* Make sure that we got at least our header! */
1228         if (ucode_raw->size < sizeof(*ucode)) {
1229                 IWL_ERR(priv, "File size way too small!\n");
1230                 ret = -EINVAL;
1231                 goto err_release;
1232         }
1233
1234         /* Data from ucode file:  header followed by uCode images */
1235         ucode = (void *)ucode_raw->data;
1236
1237         priv->ucode_ver = le32_to_cpu(ucode->ver);
1238         api_ver = IWL_UCODE_API(priv->ucode_ver);
1239         inst_size = le32_to_cpu(ucode->inst_size);
1240         data_size = le32_to_cpu(ucode->data_size);
1241         init_size = le32_to_cpu(ucode->init_size);
1242         init_data_size = le32_to_cpu(ucode->init_data_size);
1243         boot_size = le32_to_cpu(ucode->boot_size);
1244
1245         /* api_ver should match the api version forming part of the
1246          * firmware filename ... but we don't check for that and only rely
1247          * on the API version read from firmware header from here on forward */
1248
1249         if (api_ver < api_min || api_ver > api_max) {
1250                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1251                           "Driver supports v%u, firmware is v%u.\n",
1252                           api_max, api_ver);
1253                 priv->ucode_ver = 0;
1254                 ret = -EINVAL;
1255                 goto err_release;
1256         }
1257         if (api_ver != api_max)
1258                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1259                           "got v%u. New firmware can be obtained "
1260                           "from http://www.intellinuxwireless.org.\n",
1261                           api_max, api_ver);
1262
1263         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1264                IWL_UCODE_MAJOR(priv->ucode_ver),
1265                IWL_UCODE_MINOR(priv->ucode_ver),
1266                IWL_UCODE_API(priv->ucode_ver),
1267                IWL_UCODE_SERIAL(priv->ucode_ver));
1268
1269         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1270                        priv->ucode_ver);
1271         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1272                        inst_size);
1273         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1274                        data_size);
1275         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1276                        init_size);
1277         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1278                        init_data_size);
1279         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1280                        boot_size);
1281
1282         /* Verify size of file vs. image size info in file's header */
1283         if (ucode_raw->size < sizeof(*ucode) +
1284                 inst_size + data_size + init_size +
1285                 init_data_size + boot_size) {
1286
1287                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1288                                (int)ucode_raw->size);
1289                 ret = -EINVAL;
1290                 goto err_release;
1291         }
1292
1293         /* Verify that uCode images will fit in card's SRAM */
1294         if (inst_size > priv->hw_params.max_inst_size) {
1295                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1296                                inst_size);
1297                 ret = -EINVAL;
1298                 goto err_release;
1299         }
1300
1301         if (data_size > priv->hw_params.max_data_size) {
1302                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1303                                 data_size);
1304                 ret = -EINVAL;
1305                 goto err_release;
1306         }
1307         if (init_size > priv->hw_params.max_inst_size) {
1308                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1309                         init_size);
1310                 ret = -EINVAL;
1311                 goto err_release;
1312         }
1313         if (init_data_size > priv->hw_params.max_data_size) {
1314                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1315                       init_data_size);
1316                 ret = -EINVAL;
1317                 goto err_release;
1318         }
1319         if (boot_size > priv->hw_params.max_bsm_size) {
1320                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1321                         boot_size);
1322                 ret = -EINVAL;
1323                 goto err_release;
1324         }
1325
1326         /* Allocate ucode buffers for card's bus-master loading ... */
1327
1328         /* Runtime instructions and 2 copies of data:
1329          * 1) unmodified from disk
1330          * 2) backup cache for save/restore during power-downs */
1331         priv->ucode_code.len = inst_size;
1332         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1333
1334         priv->ucode_data.len = data_size;
1335         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1336
1337         priv->ucode_data_backup.len = data_size;
1338         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1339
1340         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1341             !priv->ucode_data_backup.v_addr)
1342                 goto err_pci_alloc;
1343
1344         /* Initialization instructions and data */
1345         if (init_size && init_data_size) {
1346                 priv->ucode_init.len = init_size;
1347                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1348
1349                 priv->ucode_init_data.len = init_data_size;
1350                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1351
1352                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1353                         goto err_pci_alloc;
1354         }
1355
1356         /* Bootstrap (instructions only, no data) */
1357         if (boot_size) {
1358                 priv->ucode_boot.len = boot_size;
1359                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1360
1361                 if (!priv->ucode_boot.v_addr)
1362                         goto err_pci_alloc;
1363         }
1364
1365         /* Copy images into buffers for card's bus-master reads ... */
1366
1367         /* Runtime instructions (first block of data in file) */
1368         src = &ucode->data[0];
1369         len = priv->ucode_code.len;
1370         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1371         memcpy(priv->ucode_code.v_addr, src, len);
1372         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1373                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1374
1375         /* Runtime data (2nd block)
1376          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1377         src = &ucode->data[inst_size];
1378         len = priv->ucode_data.len;
1379         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1380         memcpy(priv->ucode_data.v_addr, src, len);
1381         memcpy(priv->ucode_data_backup.v_addr, src, len);
1382
1383         /* Initialization instructions (3rd block) */
1384         if (init_size) {
1385                 src = &ucode->data[inst_size + data_size];
1386                 len = priv->ucode_init.len;
1387                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1388                                 len);
1389                 memcpy(priv->ucode_init.v_addr, src, len);
1390         }
1391
1392         /* Initialization data (4th block) */
1393         if (init_data_size) {
1394                 src = &ucode->data[inst_size + data_size + init_size];
1395                 len = priv->ucode_init_data.len;
1396                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1397                                len);
1398                 memcpy(priv->ucode_init_data.v_addr, src, len);
1399         }
1400
1401         /* Bootstrap instructions (5th block) */
1402         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1403         len = priv->ucode_boot.len;
1404         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1405         memcpy(priv->ucode_boot.v_addr, src, len);
1406
1407         /* We have our copies now, allow OS release its copies */
1408         release_firmware(ucode_raw);
1409         return 0;
1410
1411  err_pci_alloc:
1412         IWL_ERR(priv, "failed to allocate pci memory\n");
1413         ret = -ENOMEM;
1414         iwl_dealloc_ucode_pci(priv);
1415
1416  err_release:
1417         release_firmware(ucode_raw);
1418
1419  error:
1420         return ret;
1421 }
1422
1423 /**
1424  * iwl_alive_start - called after REPLY_ALIVE notification received
1425  *                   from protocol/runtime uCode (initialization uCode's
1426  *                   Alive gets handled by iwl_init_alive_start()).
1427  */
1428 static void iwl_alive_start(struct iwl_priv *priv)
1429 {
1430         int ret = 0;
1431
1432         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1433
1434         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1435                 /* We had an error bringing up the hardware, so take it
1436                  * all the way back down so we can try again */
1437                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1438                 goto restart;
1439         }
1440
1441         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1442          * This is a paranoid check, because we would not have gotten the
1443          * "runtime" alive if code weren't properly loaded.  */
1444         if (iwl_verify_ucode(priv)) {
1445                 /* Runtime instruction load was bad;
1446                  * take it all the way back down so we can try again */
1447                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1448                 goto restart;
1449         }
1450
1451         priv->cfg->ops->smgmt->clear_station_table(priv);
1452         ret = priv->cfg->ops->lib->alive_notify(priv);
1453         if (ret) {
1454                 IWL_WARN(priv,
1455                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1456                 goto restart;
1457         }
1458
1459         /* After the ALIVE response, we can send host commands to the uCode */
1460         set_bit(STATUS_ALIVE, &priv->status);
1461
1462         if (iwl_is_rfkill(priv))
1463                 return;
1464
1465         ieee80211_wake_queues(priv->hw);
1466
1467         priv->active_rate = priv->rates_mask;
1468         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1469
1470         if (iwl_is_associated(priv)) {
1471                 struct iwl_rxon_cmd *active_rxon =
1472                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1473                 /* apply any changes in staging */
1474                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1475                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1476         } else {
1477                 /* Initialize our rx_config data */
1478                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1479
1480                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1481                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1482
1483                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1484         }
1485
1486         /* Configure Bluetooth device coexistence support */
1487         iwl_send_bt_config(priv);
1488
1489         iwl_reset_run_time_calib(priv);
1490
1491         /* Configure the adapter for unassociated operation */
1492         iwlcore_commit_rxon(priv);
1493
1494         /* At this point, the NIC is initialized and operational */
1495         iwl_rf_kill_ct_config(priv);
1496
1497         iwl_leds_register(priv);
1498
1499         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1500         set_bit(STATUS_READY, &priv->status);
1501         wake_up_interruptible(&priv->wait_command_queue);
1502
1503         if (priv->error_recovering)
1504                 iwl_error_recovery(priv);
1505
1506         iwl_power_update_mode(priv, 1);
1507
1508         /* reassociate for ADHOC mode */
1509         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1510                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1511                                                                 priv->vif);
1512                 if (beacon)
1513                         iwl_mac_beacon_update(priv->hw, beacon);
1514         }
1515
1516
1517         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1518                 iwl_set_mode(priv, priv->iw_mode);
1519
1520         return;
1521
1522  restart:
1523         queue_work(priv->workqueue, &priv->restart);
1524 }
1525
1526 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1527
1528 static void __iwl_down(struct iwl_priv *priv)
1529 {
1530         unsigned long flags;
1531         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1532
1533         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1534
1535         if (!exit_pending)
1536                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1537
1538         iwl_leds_unregister(priv);
1539
1540         priv->cfg->ops->smgmt->clear_station_table(priv);
1541
1542         /* Unblock any waiting calls */
1543         wake_up_interruptible_all(&priv->wait_command_queue);
1544
1545         /* Wipe out the EXIT_PENDING status bit if we are not actually
1546          * exiting the module */
1547         if (!exit_pending)
1548                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1549
1550         /* stop and reset the on-board processor */
1551         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1552
1553         /* tell the device to stop sending interrupts */
1554         spin_lock_irqsave(&priv->lock, flags);
1555         iwl_disable_interrupts(priv);
1556         spin_unlock_irqrestore(&priv->lock, flags);
1557         iwl_synchronize_irq(priv);
1558
1559         if (priv->mac80211_registered)
1560                 ieee80211_stop_queues(priv->hw);
1561
1562         /* If we have not previously called iwl_init() then
1563          * clear all bits but the RF Kill bits and return */
1564         if (!iwl_is_init(priv)) {
1565                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1566                                         STATUS_RF_KILL_HW |
1567                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1568                                         STATUS_RF_KILL_SW |
1569                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1570                                         STATUS_GEO_CONFIGURED |
1571                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1572                                         STATUS_EXIT_PENDING;
1573                 goto exit;
1574         }
1575
1576         /* ...otherwise clear out all the status bits but the RF Kill
1577          * bits and continue taking the NIC down. */
1578         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1579                                 STATUS_RF_KILL_HW |
1580                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1581                                 STATUS_RF_KILL_SW |
1582                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1583                                 STATUS_GEO_CONFIGURED |
1584                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1585                                 STATUS_FW_ERROR |
1586                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1587                                 STATUS_EXIT_PENDING;
1588
1589         spin_lock_irqsave(&priv->lock, flags);
1590         iwl_clear_bit(priv, CSR_GP_CNTRL,
1591                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1592         spin_unlock_irqrestore(&priv->lock, flags);
1593
1594         iwl_txq_ctx_stop(priv);
1595         iwl_rxq_stop(priv);
1596
1597         spin_lock_irqsave(&priv->lock, flags);
1598         if (!iwl_grab_nic_access(priv)) {
1599                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1600                                          APMG_CLK_VAL_DMA_CLK_RQT);
1601                 iwl_release_nic_access(priv);
1602         }
1603         spin_unlock_irqrestore(&priv->lock, flags);
1604
1605         udelay(5);
1606
1607         /* FIXME: apm_ops.suspend(priv) */
1608         if (exit_pending)
1609                 priv->cfg->ops->lib->apm_ops.stop(priv);
1610         else
1611                 priv->cfg->ops->lib->apm_ops.reset(priv);
1612  exit:
1613         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1614
1615         if (priv->ibss_beacon)
1616                 dev_kfree_skb(priv->ibss_beacon);
1617         priv->ibss_beacon = NULL;
1618
1619         /* clear out any free frames */
1620         iwl_clear_free_frames(priv);
1621 }
1622
1623 static void iwl_down(struct iwl_priv *priv)
1624 {
1625         mutex_lock(&priv->mutex);
1626         __iwl_down(priv);
1627         mutex_unlock(&priv->mutex);
1628
1629         iwl_cancel_deferred_work(priv);
1630 }
1631
1632 #define MAX_HW_RESTARTS 5
1633
1634 static int __iwl_up(struct iwl_priv *priv)
1635 {
1636         int i;
1637         int ret;
1638
1639         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1640                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1641                 return -EIO;
1642         }
1643
1644         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1645                 IWL_ERR(priv, "ucode not available for device bringup\n");
1646                 return -EIO;
1647         }
1648
1649         /* If platform's RF_KILL switch is NOT set to KILL */
1650         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1651                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1652         else
1653                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1654
1655         if (iwl_is_rfkill(priv)) {
1656                 iwl_enable_interrupts(priv);
1657                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1658                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1659                 return 0;
1660         }
1661
1662         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1663
1664         ret = iwl_hw_nic_init(priv);
1665         if (ret) {
1666                 IWL_ERR(priv, "Unable to init nic\n");
1667                 return ret;
1668         }
1669
1670         /* make sure rfkill handshake bits are cleared */
1671         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1672         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1673                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1674
1675         /* clear (again), then enable host interrupts */
1676         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1677         iwl_enable_interrupts(priv);
1678
1679         /* really make sure rfkill handshake bits are cleared */
1680         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1681         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1682
1683         /* Copy original ucode data image from disk into backup cache.
1684          * This will be used to initialize the on-board processor's
1685          * data SRAM for a clean start when the runtime program first loads. */
1686         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1687                priv->ucode_data.len);
1688
1689         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1690
1691                 priv->cfg->ops->smgmt->clear_station_table(priv);
1692
1693                 /* load bootstrap state machine,
1694                  * load bootstrap program into processor's memory,
1695                  * prepare to load the "initialize" uCode */
1696                 ret = priv->cfg->ops->lib->load_ucode(priv);
1697
1698                 if (ret) {
1699                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1700                                 ret);
1701                         continue;
1702                 }
1703
1704                 /* Clear out the uCode error bit if it is set */
1705                 clear_bit(STATUS_FW_ERROR, &priv->status);
1706
1707                 /* start card; "initialize" will load runtime ucode */
1708                 iwl_nic_start(priv);
1709
1710                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1711
1712                 return 0;
1713         }
1714
1715         set_bit(STATUS_EXIT_PENDING, &priv->status);
1716         __iwl_down(priv);
1717         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1718
1719         /* tried to restart and config the device for as long as our
1720          * patience could withstand */
1721         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1722         return -EIO;
1723 }
1724
1725
1726 /*****************************************************************************
1727  *
1728  * Workqueue callbacks
1729  *
1730  *****************************************************************************/
1731
1732 static void iwl_bg_init_alive_start(struct work_struct *data)
1733 {
1734         struct iwl_priv *priv =
1735             container_of(data, struct iwl_priv, init_alive_start.work);
1736
1737         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1738                 return;
1739
1740         mutex_lock(&priv->mutex);
1741         priv->cfg->ops->lib->init_alive_start(priv);
1742         mutex_unlock(&priv->mutex);
1743 }
1744
1745 static void iwl_bg_alive_start(struct work_struct *data)
1746 {
1747         struct iwl_priv *priv =
1748             container_of(data, struct iwl_priv, alive_start.work);
1749
1750         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1751                 return;
1752
1753         mutex_lock(&priv->mutex);
1754         iwl_alive_start(priv);
1755         mutex_unlock(&priv->mutex);
1756 }
1757
1758 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1759 {
1760         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1761                         run_time_calib_work);
1762
1763         mutex_lock(&priv->mutex);
1764
1765         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1766             test_bit(STATUS_SCANNING, &priv->status)) {
1767                 mutex_unlock(&priv->mutex);
1768                 return;
1769         }
1770
1771         if (priv->start_calib) {
1772                 iwl_chain_noise_calibration(priv, &priv->statistics);
1773
1774                 iwl_sensitivity_calibration(priv, &priv->statistics);
1775         }
1776
1777         mutex_unlock(&priv->mutex);
1778         return;
1779 }
1780
1781 static void iwl_bg_up(struct work_struct *data)
1782 {
1783         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1784
1785         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1786                 return;
1787
1788         mutex_lock(&priv->mutex);
1789         __iwl_up(priv);
1790         mutex_unlock(&priv->mutex);
1791         iwl_rfkill_set_hw_state(priv);
1792 }
1793
1794 static void iwl_bg_restart(struct work_struct *data)
1795 {
1796         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1797
1798         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1799                 return;
1800
1801         iwl_down(priv);
1802         queue_work(priv->workqueue, &priv->up);
1803 }
1804
1805 static void iwl_bg_rx_replenish(struct work_struct *data)
1806 {
1807         struct iwl_priv *priv =
1808             container_of(data, struct iwl_priv, rx_replenish);
1809
1810         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1811                 return;
1812
1813         mutex_lock(&priv->mutex);
1814         iwl_rx_replenish(priv);
1815         mutex_unlock(&priv->mutex);
1816 }
1817
1818 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1819
1820 void iwl_post_associate(struct iwl_priv *priv)
1821 {
1822         struct ieee80211_conf *conf = NULL;
1823         int ret = 0;
1824         unsigned long flags;
1825
1826         if (priv->iw_mode == NL80211_IFTYPE_AP) {
1827                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1828                 return;
1829         }
1830
1831         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1832                         priv->assoc_id, priv->active_rxon.bssid_addr);
1833
1834
1835         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1836                 return;
1837
1838
1839         if (!priv->vif || !priv->is_open)
1840                 return;
1841
1842         iwl_power_cancel_timeout(priv);
1843         iwl_scan_cancel_timeout(priv, 200);
1844
1845         conf = ieee80211_get_hw_conf(priv->hw);
1846
1847         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1848         iwlcore_commit_rxon(priv);
1849
1850         iwl_setup_rxon_timing(priv);
1851         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
1852                               sizeof(priv->rxon_timing), &priv->rxon_timing);
1853         if (ret)
1854                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
1855                             "Attempting to continue.\n");
1856
1857         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1858
1859         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1860
1861         if (priv->cfg->ops->hcmd->set_rxon_chain)
1862                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1863
1864         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
1865
1866         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1867                         priv->assoc_id, priv->beacon_int);
1868
1869         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1870                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1871         else
1872                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1873
1874         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
1875                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1876                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1877                 else
1878                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1879
1880                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1881                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1882
1883         }
1884
1885         iwlcore_commit_rxon(priv);
1886
1887         switch (priv->iw_mode) {
1888         case NL80211_IFTYPE_STATION:
1889                 break;
1890
1891         case NL80211_IFTYPE_ADHOC:
1892
1893                 /* assume default assoc id */
1894                 priv->assoc_id = 1;
1895
1896                 iwl_rxon_add_station(priv, priv->bssid, 0);
1897                 iwl_send_beacon_cmd(priv);
1898
1899                 break;
1900
1901         default:
1902                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1903                           __func__, priv->iw_mode);
1904                 break;
1905         }
1906
1907         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1908                 priv->assoc_station_added = 1;
1909
1910         spin_lock_irqsave(&priv->lock, flags);
1911         iwl_activate_qos(priv, 0);
1912         spin_unlock_irqrestore(&priv->lock, flags);
1913
1914         /* the chain noise calibration will enabled PM upon completion
1915          * If chain noise has already been run, then we need to enable
1916          * power management here */
1917         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1918                 iwl_power_enable_management(priv);
1919
1920         /* Enable Rx differential gain and sensitivity calibrations */
1921         iwl_chain_noise_reset(priv);
1922         priv->start_calib = 1;
1923
1924 }
1925
1926 /*****************************************************************************
1927  *
1928  * mac80211 entry point functions
1929  *
1930  *****************************************************************************/
1931
1932 #define UCODE_READY_TIMEOUT     (4 * HZ)
1933
1934 static int iwl_mac_start(struct ieee80211_hw *hw)
1935 {
1936         struct iwl_priv *priv = hw->priv;
1937         int ret;
1938
1939         IWL_DEBUG_MAC80211(priv, "enter\n");
1940
1941         /* we should be verifying the device is ready to be opened */
1942         mutex_lock(&priv->mutex);
1943
1944         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
1945         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
1946          * ucode filename and max sizes are card-specific. */
1947
1948         if (!priv->ucode_code.len) {
1949                 ret = iwl_read_ucode(priv);
1950                 if (ret) {
1951                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
1952                         mutex_unlock(&priv->mutex);
1953                         return ret;
1954                 }
1955         }
1956
1957         ret = __iwl_up(priv);
1958
1959         mutex_unlock(&priv->mutex);
1960
1961         iwl_rfkill_set_hw_state(priv);
1962
1963         if (ret)
1964                 return ret;
1965
1966         if (iwl_is_rfkill(priv))
1967                 goto out;
1968
1969         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
1970
1971         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
1972          * mac80211 will not be run successfully. */
1973         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
1974                         test_bit(STATUS_READY, &priv->status),
1975                         UCODE_READY_TIMEOUT);
1976         if (!ret) {
1977                 if (!test_bit(STATUS_READY, &priv->status)) {
1978                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
1979                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
1980                         return -ETIMEDOUT;
1981                 }
1982         }
1983
1984 out:
1985         priv->is_open = 1;
1986         IWL_DEBUG_MAC80211(priv, "leave\n");
1987         return 0;
1988 }
1989
1990 static void iwl_mac_stop(struct ieee80211_hw *hw)
1991 {
1992         struct iwl_priv *priv = hw->priv;
1993
1994         IWL_DEBUG_MAC80211(priv, "enter\n");
1995
1996         if (!priv->is_open) {
1997                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
1998                 return;
1999         }
2000
2001         priv->is_open = 0;
2002
2003         if (iwl_is_ready_rf(priv)) {
2004                 /* stop mac, cancel any scan request and clear
2005                  * RXON_FILTER_ASSOC_MSK BIT
2006                  */
2007                 mutex_lock(&priv->mutex);
2008                 iwl_scan_cancel_timeout(priv, 100);
2009                 mutex_unlock(&priv->mutex);
2010         }
2011
2012         iwl_down(priv);
2013
2014         flush_workqueue(priv->workqueue);
2015
2016         /* enable interrupts again in order to receive rfkill changes */
2017         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2018         iwl_enable_interrupts(priv);
2019
2020         IWL_DEBUG_MAC80211(priv, "leave\n");
2021 }
2022
2023 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2024 {
2025         struct iwl_priv *priv = hw->priv;
2026
2027         IWL_DEBUG_MACDUMP(priv, "enter\n");
2028
2029         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2030                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2031
2032         if (iwl_tx_skb(priv, skb))
2033                 dev_kfree_skb_any(skb);
2034
2035         IWL_DEBUG_MACDUMP(priv, "leave\n");
2036         return NETDEV_TX_OK;
2037 }
2038
2039 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2040                                  struct ieee80211_if_init_conf *conf)
2041 {
2042         struct iwl_priv *priv = hw->priv;
2043         unsigned long flags;
2044
2045         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2046
2047         if (priv->vif) {
2048                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2049                 return -EOPNOTSUPP;
2050         }
2051
2052         spin_lock_irqsave(&priv->lock, flags);
2053         priv->vif = conf->vif;
2054         priv->iw_mode = conf->type;
2055
2056         spin_unlock_irqrestore(&priv->lock, flags);
2057
2058         mutex_lock(&priv->mutex);
2059
2060         if (conf->mac_addr) {
2061                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2062                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2063         }
2064
2065         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2066                 /* we are not ready, will run again when ready */
2067                 set_bit(STATUS_MODE_PENDING, &priv->status);
2068
2069         mutex_unlock(&priv->mutex);
2070
2071         IWL_DEBUG_MAC80211(priv, "leave\n");
2072         return 0;
2073 }
2074
2075 /**
2076  * iwl_mac_config - mac80211 config callback
2077  *
2078  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2079  * be set inappropriately and the driver currently sets the hardware up to
2080  * use it whenever needed.
2081  */
2082 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2083 {
2084         struct iwl_priv *priv = hw->priv;
2085         const struct iwl_channel_info *ch_info;
2086         struct ieee80211_conf *conf = &hw->conf;
2087         unsigned long flags = 0;
2088         int ret = 0;
2089         u16 ch;
2090         int scan_active = 0;
2091
2092         mutex_lock(&priv->mutex);
2093         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2094                                         conf->channel->hw_value, changed);
2095
2096         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2097                         test_bit(STATUS_SCANNING, &priv->status))) {
2098                 scan_active = 1;
2099                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2100         }
2101
2102
2103         /* during scanning mac80211 will delay channel setting until
2104          * scan finish with changed = 0
2105          */
2106         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2107                 if (scan_active)
2108                         goto set_ch_out;
2109
2110                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2111                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2112                 if (!is_channel_valid(ch_info)) {
2113                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2114                         ret = -EINVAL;
2115                         goto set_ch_out;
2116                 }
2117
2118                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2119                         !is_channel_ibss(ch_info)) {
2120                         IWL_ERR(priv, "channel %d in band %d not "
2121                                 "IBSS channel\n",
2122                                 conf->channel->hw_value, conf->channel->band);
2123                         ret = -EINVAL;
2124                         goto set_ch_out;
2125                 }
2126
2127                 priv->current_ht_config.is_ht = conf_is_ht(conf);
2128
2129                 spin_lock_irqsave(&priv->lock, flags);
2130
2131
2132                 /* if we are switching from ht to 2.4 clear flags
2133                  * from any ht related info since 2.4 does not
2134                  * support ht */
2135                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2136                         priv->staging_rxon.flags = 0;
2137
2138                 iwl_set_rxon_channel(priv, conf->channel);
2139
2140                 iwl_set_flags_for_band(priv, conf->channel->band);
2141                 spin_unlock_irqrestore(&priv->lock, flags);
2142  set_ch_out:
2143                 /* The list of supported rates and rate mask can be different
2144                  * for each band; since the band may have changed, reset
2145                  * the rate mask to what mac80211 lists */
2146                 iwl_set_rate(priv);
2147         }
2148
2149         if (changed & IEEE80211_CONF_CHANGE_PS) {
2150                 if (conf->flags & IEEE80211_CONF_PS)
2151                         ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2152                 else
2153                         ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2154                 if (ret)
2155                         IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2156
2157         }
2158
2159         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2160                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2161                         priv->tx_power_user_lmt, conf->power_level);
2162
2163                 iwl_set_tx_power(priv, conf->power_level, false);
2164         }
2165
2166         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2167         if (priv->cfg->ops->hcmd->set_rxon_chain)
2168                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2169
2170         if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
2171                 if (conf->radio_enabled &&
2172                         iwl_radio_kill_sw_enable_radio(priv)) {
2173                         IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
2174                                                 "waiting for uCode\n");
2175                         goto out;
2176                 }
2177
2178                 if (!conf->radio_enabled)
2179                         iwl_radio_kill_sw_disable_radio(priv);
2180         }
2181
2182         if (!conf->radio_enabled) {
2183                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2184                 goto out;
2185         }
2186
2187         if (!iwl_is_ready(priv)) {
2188                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2189                 goto out;
2190         }
2191
2192         if (scan_active)
2193                 goto out;
2194
2195         if (memcmp(&priv->active_rxon,
2196                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2197                 iwlcore_commit_rxon(priv);
2198         else
2199                 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2200
2201
2202 out:
2203         IWL_DEBUG_MAC80211(priv, "leave\n");
2204         mutex_unlock(&priv->mutex);
2205         return ret;
2206 }
2207
2208 static void iwl_config_ap(struct iwl_priv *priv)
2209 {
2210         int ret = 0;
2211         unsigned long flags;
2212
2213         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2214                 return;
2215
2216         /* The following should be done only at AP bring up */
2217         if (!iwl_is_associated(priv)) {
2218
2219                 /* RXON - unassoc (to set timing command) */
2220                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2221                 iwlcore_commit_rxon(priv);
2222
2223                 /* RXON Timing */
2224                 iwl_setup_rxon_timing(priv);
2225                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2226                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2227                 if (ret)
2228                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2229                                         "Attempting to continue.\n");
2230
2231                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2232                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2233
2234                 /* FIXME: what should be the assoc_id for AP? */
2235                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2236                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2237                         priv->staging_rxon.flags |=
2238                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2239                 else
2240                         priv->staging_rxon.flags &=
2241                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2242
2243                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2244                         if (priv->assoc_capability &
2245                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2246                                 priv->staging_rxon.flags |=
2247                                         RXON_FLG_SHORT_SLOT_MSK;
2248                         else
2249                                 priv->staging_rxon.flags &=
2250                                         ~RXON_FLG_SHORT_SLOT_MSK;
2251
2252                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2253                                 priv->staging_rxon.flags &=
2254                                         ~RXON_FLG_SHORT_SLOT_MSK;
2255                 }
2256                 /* restore RXON assoc */
2257                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2258                 iwlcore_commit_rxon(priv);
2259                 spin_lock_irqsave(&priv->lock, flags);
2260                 iwl_activate_qos(priv, 1);
2261                 spin_unlock_irqrestore(&priv->lock, flags);
2262                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2263         }
2264         iwl_send_beacon_cmd(priv);
2265
2266         /* FIXME - we need to add code here to detect a totally new
2267          * configuration, reset the AP, unassoc, rxon timing, assoc,
2268          * clear sta table, add BCAST sta... */
2269 }
2270
2271
2272 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2273                                         struct ieee80211_vif *vif,
2274                                     struct ieee80211_if_conf *conf)
2275 {
2276         struct iwl_priv *priv = hw->priv;
2277         int rc;
2278
2279         if (conf == NULL)
2280                 return -EIO;
2281
2282         if (priv->vif != vif) {
2283                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2284                 return 0;
2285         }
2286
2287         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2288             conf->changed & IEEE80211_IFCC_BEACON) {
2289                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2290                 if (!beacon)
2291                         return -ENOMEM;
2292                 mutex_lock(&priv->mutex);
2293                 rc = iwl_mac_beacon_update(hw, beacon);
2294                 mutex_unlock(&priv->mutex);
2295                 if (rc)
2296                         return rc;
2297         }
2298
2299         if (!iwl_is_alive(priv))
2300                 return -EAGAIN;
2301
2302         mutex_lock(&priv->mutex);
2303
2304         if (conf->bssid)
2305                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2306
2307 /*
2308  * very dubious code was here; the probe filtering flag is never set:
2309  *
2310         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2311             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2312  */
2313
2314         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2315                 if (!conf->bssid) {
2316                         conf->bssid = priv->mac_addr;
2317                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2318                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2319                                            conf->bssid);
2320                 }
2321                 if (priv->ibss_beacon)
2322                         dev_kfree_skb(priv->ibss_beacon);
2323
2324                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2325         }
2326
2327         if (iwl_is_rfkill(priv))
2328                 goto done;
2329
2330         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2331             !is_multicast_ether_addr(conf->bssid)) {
2332                 /* If there is currently a HW scan going on in the background
2333                  * then we need to cancel it else the RXON below will fail. */
2334                 if (iwl_scan_cancel_timeout(priv, 100)) {
2335                         IWL_WARN(priv, "Aborted scan still in progress "
2336                                     "after 100ms\n");
2337                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2338                         mutex_unlock(&priv->mutex);
2339                         return -EAGAIN;
2340                 }
2341                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2342
2343                 /* TODO: Audit driver for usage of these members and see
2344                  * if mac80211 deprecates them (priv->bssid looks like it
2345                  * shouldn't be there, but I haven't scanned the IBSS code
2346                  * to verify) - jpk */
2347                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2348
2349                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2350                         iwl_config_ap(priv);
2351                 else {
2352                         rc = iwlcore_commit_rxon(priv);
2353                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2354                                 iwl_rxon_add_station(
2355                                         priv, priv->active_rxon.bssid_addr, 1);
2356                 }
2357
2358         } else {
2359                 iwl_scan_cancel_timeout(priv, 100);
2360                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2361                 iwlcore_commit_rxon(priv);
2362         }
2363
2364  done:
2365         IWL_DEBUG_MAC80211(priv, "leave\n");
2366         mutex_unlock(&priv->mutex);
2367
2368         return 0;
2369 }
2370
2371 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2372                                      struct ieee80211_if_init_conf *conf)
2373 {
2374         struct iwl_priv *priv = hw->priv;
2375
2376         IWL_DEBUG_MAC80211(priv, "enter\n");
2377
2378         mutex_lock(&priv->mutex);
2379
2380         if (iwl_is_ready_rf(priv)) {
2381                 iwl_scan_cancel_timeout(priv, 100);
2382                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2383                 iwlcore_commit_rxon(priv);
2384         }
2385         if (priv->vif == conf->vif) {
2386                 priv->vif = NULL;
2387                 memset(priv->bssid, 0, ETH_ALEN);
2388         }
2389         mutex_unlock(&priv->mutex);
2390
2391         IWL_DEBUG_MAC80211(priv, "leave\n");
2392
2393 }
2394
2395 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2396                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2397                         u32 iv32, u16 *phase1key)
2398 {
2399
2400         struct iwl_priv *priv = hw->priv;
2401         IWL_DEBUG_MAC80211(priv, "enter\n");
2402
2403         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2404
2405         IWL_DEBUG_MAC80211(priv, "leave\n");
2406 }
2407
2408 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2409                            struct ieee80211_vif *vif,
2410                            struct ieee80211_sta *sta,
2411                            struct ieee80211_key_conf *key)
2412 {
2413         struct iwl_priv *priv = hw->priv;
2414         const u8 *addr;
2415         int ret;
2416         u8 sta_id;
2417         bool is_default_wep_key = false;
2418
2419         IWL_DEBUG_MAC80211(priv, "enter\n");
2420
2421         if (priv->hw_params.sw_crypto) {
2422                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2423                 return -EOPNOTSUPP;
2424         }
2425         addr = sta ? sta->addr : iwl_bcast_addr;
2426         sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
2427         if (sta_id == IWL_INVALID_STATION) {
2428                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2429                                    addr);
2430                 return -EINVAL;
2431
2432         }
2433
2434         mutex_lock(&priv->mutex);
2435         iwl_scan_cancel_timeout(priv, 100);
2436         mutex_unlock(&priv->mutex);
2437
2438         /* If we are getting WEP group key and we didn't receive any key mapping
2439          * so far, we are in legacy wep mode (group key only), otherwise we are
2440          * in 1X mode.
2441          * In legacy wep mode, we use another host command to the uCode */
2442         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2443                 priv->iw_mode != NL80211_IFTYPE_AP) {
2444                 if (cmd == SET_KEY)
2445                         is_default_wep_key = !priv->key_mapping_key;
2446                 else
2447                         is_default_wep_key =
2448                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2449         }
2450
2451         switch (cmd) {
2452         case SET_KEY:
2453                 if (is_default_wep_key)
2454                         ret = iwl_set_default_wep_key(priv, key);
2455                 else
2456                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2457
2458                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2459                 break;
2460         case DISABLE_KEY:
2461                 if (is_default_wep_key)
2462                         ret = iwl_remove_default_wep_key(priv, key);
2463                 else
2464                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2465
2466                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2467                 break;
2468         default:
2469                 ret = -EINVAL;
2470         }
2471
2472         IWL_DEBUG_MAC80211(priv, "leave\n");
2473
2474         return ret;
2475 }
2476
2477 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2478                              enum ieee80211_ampdu_mlme_action action,
2479                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2480 {
2481         struct iwl_priv *priv = hw->priv;
2482         int ret;
2483
2484         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2485                      sta->addr, tid);
2486
2487         if (!(priv->cfg->sku & IWL_SKU_N))
2488                 return -EACCES;
2489
2490         switch (action) {
2491         case IEEE80211_AMPDU_RX_START:
2492                 IWL_DEBUG_HT(priv, "start Rx\n");
2493                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2494         case IEEE80211_AMPDU_RX_STOP:
2495                 IWL_DEBUG_HT(priv, "stop Rx\n");
2496                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2497                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2498                         return 0;
2499                 else
2500                         return ret;
2501         case IEEE80211_AMPDU_TX_START:
2502                 IWL_DEBUG_HT(priv, "start Tx\n");
2503                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2504         case IEEE80211_AMPDU_TX_STOP:
2505                 IWL_DEBUG_HT(priv, "stop Tx\n");
2506                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2507                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2508                         return 0;
2509                 else
2510                         return ret;
2511         default:
2512                 IWL_DEBUG_HT(priv, "unknown\n");
2513                 return -EINVAL;
2514                 break;
2515         }
2516         return 0;
2517 }
2518
2519 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2520                                 struct ieee80211_tx_queue_stats *stats)
2521 {
2522         struct iwl_priv *priv = hw->priv;
2523         int i, avail;
2524         struct iwl_tx_queue *txq;
2525         struct iwl_queue *q;
2526         unsigned long flags;
2527
2528         IWL_DEBUG_MAC80211(priv, "enter\n");
2529
2530         if (!iwl_is_ready_rf(priv)) {
2531                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2532                 return -EIO;
2533         }
2534
2535         spin_lock_irqsave(&priv->lock, flags);
2536
2537         for (i = 0; i < AC_NUM; i++) {
2538                 txq = &priv->txq[i];
2539                 q = &txq->q;
2540                 avail = iwl_queue_space(q);
2541
2542                 stats[i].len = q->n_window - avail;
2543                 stats[i].limit = q->n_window - q->high_mark;
2544                 stats[i].count = q->n_window;
2545
2546         }
2547         spin_unlock_irqrestore(&priv->lock, flags);
2548
2549         IWL_DEBUG_MAC80211(priv, "leave\n");
2550
2551         return 0;
2552 }
2553
2554 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2555                              struct ieee80211_low_level_stats *stats)
2556 {
2557         struct iwl_priv *priv = hw->priv;
2558
2559         priv = hw->priv;
2560         IWL_DEBUG_MAC80211(priv, "enter\n");
2561         IWL_DEBUG_MAC80211(priv, "leave\n");
2562
2563         return 0;
2564 }
2565
2566 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2567 {
2568         struct iwl_priv *priv = hw->priv;
2569         unsigned long flags;
2570
2571         mutex_lock(&priv->mutex);
2572         IWL_DEBUG_MAC80211(priv, "enter\n");
2573
2574         spin_lock_irqsave(&priv->lock, flags);
2575         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2576         spin_unlock_irqrestore(&priv->lock, flags);
2577
2578         iwl_reset_qos(priv);
2579
2580         spin_lock_irqsave(&priv->lock, flags);
2581         priv->assoc_id = 0;
2582         priv->assoc_capability = 0;
2583         priv->assoc_station_added = 0;
2584
2585         /* new association get rid of ibss beacon skb */
2586         if (priv->ibss_beacon)
2587                 dev_kfree_skb(priv->ibss_beacon);
2588
2589         priv->ibss_beacon = NULL;
2590
2591         priv->beacon_int = priv->hw->conf.beacon_int;
2592         priv->timestamp = 0;
2593         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2594                 priv->beacon_int = 0;
2595
2596         spin_unlock_irqrestore(&priv->lock, flags);
2597
2598         if (!iwl_is_ready_rf(priv)) {
2599                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2600                 mutex_unlock(&priv->mutex);
2601                 return;
2602         }
2603
2604         /* we are restarting association process
2605          * clear RXON_FILTER_ASSOC_MSK bit
2606          */
2607         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2608                 iwl_scan_cancel_timeout(priv, 100);
2609                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2610                 iwlcore_commit_rxon(priv);
2611         }
2612
2613         iwl_power_update_mode(priv, 0);
2614
2615         /* Per mac80211.h: This is only used in IBSS mode... */
2616         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2617
2618                 /* switch to CAM during association period.
2619                  * the ucode will block any association/authentication
2620                  * frome during assiciation period if it can not hear
2621                  * the AP because of PM. the timer enable PM back is
2622                  * association do not complete
2623                  */
2624                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
2625                                                      IEEE80211_CHAN_RADAR))
2626                                 iwl_power_disable_management(priv, 3000);
2627
2628                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2629                 mutex_unlock(&priv->mutex);
2630                 return;
2631         }
2632
2633         iwl_set_rate(priv);
2634
2635         mutex_unlock(&priv->mutex);
2636
2637         IWL_DEBUG_MAC80211(priv, "leave\n");
2638 }
2639
2640
2641 /*****************************************************************************
2642  *
2643  * sysfs attributes
2644  *
2645  *****************************************************************************/
2646
2647 #ifdef CONFIG_IWLWIFI_DEBUG
2648
2649 /*
2650  * The following adds a new attribute to the sysfs representation
2651  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2652  * used for controlling the debug level.
2653  *
2654  * See the level definitions in iwl for details.
2655  */
2656
2657 static ssize_t show_debug_level(struct device *d,
2658                                 struct device_attribute *attr, char *buf)
2659 {
2660         struct iwl_priv *priv = d->driver_data;
2661
2662         return sprintf(buf, "0x%08X\n", priv->debug_level);
2663 }
2664 static ssize_t store_debug_level(struct device *d,
2665                                 struct device_attribute *attr,
2666                                  const char *buf, size_t count)
2667 {
2668         struct iwl_priv *priv = d->driver_data;
2669         unsigned long val;
2670         int ret;
2671
2672         ret = strict_strtoul(buf, 0, &val);
2673         if (ret)
2674                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2675         else
2676                 priv->debug_level = val;
2677
2678         return strnlen(buf, count);
2679 }
2680
2681 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2682                         show_debug_level, store_debug_level);
2683
2684
2685 #endif /* CONFIG_IWLWIFI_DEBUG */
2686
2687
2688 static ssize_t show_version(struct device *d,
2689                                 struct device_attribute *attr, char *buf)
2690 {
2691         struct iwl_priv *priv = d->driver_data;
2692         struct iwl_alive_resp *palive = &priv->card_alive;
2693         ssize_t pos = 0;
2694         u16 eeprom_ver;
2695
2696         if (palive->is_valid)
2697                 pos += sprintf(buf + pos,
2698                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2699                                 "fw type: 0x%01X 0x%01X\n",
2700                                 palive->ucode_major, palive->ucode_minor,
2701                                 palive->sw_rev[0], palive->sw_rev[1],
2702                                 palive->ver_type, palive->ver_subtype);
2703         else
2704                 pos += sprintf(buf + pos, "fw not loaded\n");
2705
2706         if (priv->eeprom) {
2707                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2708                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
2709                                  eeprom_ver);
2710         } else {
2711                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2712         }
2713
2714         return pos;
2715 }
2716
2717 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2718
2719 static ssize_t show_temperature(struct device *d,
2720                                 struct device_attribute *attr, char *buf)
2721 {
2722         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2723
2724         if (!iwl_is_alive(priv))
2725                 return -EAGAIN;
2726
2727         return sprintf(buf, "%d\n", priv->temperature);
2728 }
2729
2730 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2731
2732 static ssize_t show_tx_power(struct device *d,
2733                              struct device_attribute *attr, char *buf)
2734 {
2735         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2736
2737         if (!iwl_is_ready_rf(priv))
2738                 return sprintf(buf, "off\n");
2739         else
2740                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2741 }
2742
2743 static ssize_t store_tx_power(struct device *d,
2744                               struct device_attribute *attr,
2745                               const char *buf, size_t count)
2746 {
2747         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2748         unsigned long val;
2749         int ret;
2750
2751         ret = strict_strtoul(buf, 10, &val);
2752         if (ret)
2753                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2754         else
2755                 iwl_set_tx_power(priv, val, false);
2756
2757         return count;
2758 }
2759
2760 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2761
2762 static ssize_t show_flags(struct device *d,
2763                           struct device_attribute *attr, char *buf)
2764 {
2765         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2766
2767         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2768 }
2769
2770 static ssize_t store_flags(struct device *d,
2771                            struct device_attribute *attr,
2772                            const char *buf, size_t count)
2773 {
2774         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2775         unsigned long val;
2776         u32 flags;
2777         int ret = strict_strtoul(buf, 0, &val);
2778         if (ret)
2779                 return ret;
2780         flags = (u32)val;
2781
2782         mutex_lock(&priv->mutex);
2783         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2784                 /* Cancel any currently running scans... */
2785                 if (iwl_scan_cancel_timeout(priv, 100))
2786                         IWL_WARN(priv, "Could not cancel scan.\n");
2787                 else {
2788                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2789                         priv->staging_rxon.flags = cpu_to_le32(flags);
2790                         iwlcore_commit_rxon(priv);
2791                 }
2792         }
2793         mutex_unlock(&priv->mutex);
2794
2795         return count;
2796 }
2797
2798 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2799
2800 static ssize_t show_filter_flags(struct device *d,
2801                                  struct device_attribute *attr, char *buf)
2802 {
2803         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2804
2805         return sprintf(buf, "0x%04X\n",
2806                 le32_to_cpu(priv->active_rxon.filter_flags));
2807 }
2808
2809 static ssize_t store_filter_flags(struct device *d,
2810                                   struct device_attribute *attr,
2811                                   const char *buf, size_t count)
2812 {
2813         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2814         unsigned long val;
2815         u32 filter_flags;
2816         int ret = strict_strtoul(buf, 0, &val);
2817         if (ret)
2818                 return ret;
2819         filter_flags = (u32)val;
2820
2821         mutex_lock(&priv->mutex);
2822         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2823                 /* Cancel any currently running scans... */
2824                 if (iwl_scan_cancel_timeout(priv, 100))
2825                         IWL_WARN(priv, "Could not cancel scan.\n");
2826                 else {
2827                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2828                                        "0x%04X\n", filter_flags);
2829                         priv->staging_rxon.filter_flags =
2830                                 cpu_to_le32(filter_flags);
2831                         iwlcore_commit_rxon(priv);
2832                 }
2833         }
2834         mutex_unlock(&priv->mutex);
2835
2836         return count;
2837 }
2838
2839 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2840                    store_filter_flags);
2841
2842 static ssize_t store_power_level(struct device *d,
2843                                  struct device_attribute *attr,
2844                                  const char *buf, size_t count)
2845 {
2846         struct iwl_priv *priv = dev_get_drvdata(d);
2847         int ret;
2848         unsigned long mode;
2849
2850
2851         mutex_lock(&priv->mutex);
2852
2853         ret = strict_strtoul(buf, 10, &mode);
2854         if (ret)
2855                 goto out;
2856
2857         ret = iwl_power_set_user_mode(priv, mode);
2858         if (ret) {
2859                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
2860                 goto out;
2861         }
2862         ret = count;
2863
2864  out:
2865         mutex_unlock(&priv->mutex);
2866         return ret;
2867 }
2868
2869 static ssize_t show_power_level(struct device *d,
2870                                 struct device_attribute *attr, char *buf)
2871 {
2872         struct iwl_priv *priv = dev_get_drvdata(d);
2873         int mode = priv->power_data.user_power_setting;
2874         int system = priv->power_data.system_power_setting;
2875         int level = priv->power_data.power_mode;
2876         char *p = buf;
2877
2878         switch (system) {
2879         case IWL_POWER_SYS_AUTO:
2880                 p += sprintf(p, "SYSTEM:auto");
2881                 break;
2882         case IWL_POWER_SYS_AC:
2883                 p += sprintf(p, "SYSTEM:ac");
2884                 break;
2885         case IWL_POWER_SYS_BATTERY:
2886                 p += sprintf(p, "SYSTEM:battery");
2887                 break;
2888         }
2889
2890         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
2891                         "fixed" : "auto");
2892         p += sprintf(p, "\tINDEX:%d", level);
2893         p += sprintf(p, "\n");
2894         return p - buf + 1;
2895 }
2896
2897 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
2898                    store_power_level);
2899
2900
2901 static ssize_t show_statistics(struct device *d,
2902                                struct device_attribute *attr, char *buf)
2903 {
2904         struct iwl_priv *priv = dev_get_drvdata(d);
2905         u32 size = sizeof(struct iwl_notif_statistics);
2906         u32 len = 0, ofs = 0;
2907         u8 *data = (u8 *)&priv->statistics;
2908         int rc = 0;
2909
2910         if (!iwl_is_alive(priv))
2911                 return -EAGAIN;
2912
2913         mutex_lock(&priv->mutex);
2914         rc = iwl_send_statistics_request(priv, 0);
2915         mutex_unlock(&priv->mutex);
2916
2917         if (rc) {
2918                 len = sprintf(buf,
2919                               "Error sending statistics request: 0x%08X\n", rc);
2920                 return len;
2921         }
2922
2923         while (size && (PAGE_SIZE - len)) {
2924                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2925                                    PAGE_SIZE - len, 1);
2926                 len = strlen(buf);
2927                 if (PAGE_SIZE - len)
2928                         buf[len++] = '\n';
2929
2930                 ofs += 16;
2931                 size -= min(size, 16U);
2932         }
2933
2934         return len;
2935 }
2936
2937 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
2938
2939
2940 /*****************************************************************************
2941  *
2942  * driver setup and teardown
2943  *
2944  *****************************************************************************/
2945
2946 static void iwl_setup_deferred_work(struct iwl_priv *priv)
2947 {
2948         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
2949
2950         init_waitqueue_head(&priv->wait_command_queue);
2951
2952         INIT_WORK(&priv->up, iwl_bg_up);
2953         INIT_WORK(&priv->restart, iwl_bg_restart);
2954         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
2955         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
2956         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
2957         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
2958         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
2959         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
2960
2961         iwl_setup_scan_deferred_work(priv);
2962         iwl_setup_power_deferred_work(priv);
2963
2964         if (priv->cfg->ops->lib->setup_deferred_work)
2965                 priv->cfg->ops->lib->setup_deferred_work(priv);
2966
2967         init_timer(&priv->statistics_periodic);
2968         priv->statistics_periodic.data = (unsigned long)priv;
2969         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
2970
2971         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2972                      iwl_irq_tasklet, (unsigned long)priv);
2973 }
2974
2975 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
2976 {
2977         if (priv->cfg->ops->lib->cancel_deferred_work)
2978                 priv->cfg->ops->lib->cancel_deferred_work(priv);
2979
2980         cancel_delayed_work_sync(&priv->init_alive_start);
2981         cancel_delayed_work(&priv->scan_check);
2982         cancel_delayed_work_sync(&priv->set_power_save);
2983         cancel_delayed_work(&priv->alive_start);
2984         cancel_work_sync(&priv->beacon_update);
2985         del_timer_sync(&priv->statistics_periodic);
2986 }
2987
2988 static struct attribute *iwl_sysfs_entries[] = {
2989         &dev_attr_flags.attr,
2990         &dev_attr_filter_flags.attr,
2991         &dev_attr_power_level.attr,
2992         &dev_attr_statistics.attr,
2993         &dev_attr_temperature.attr,
2994         &dev_attr_tx_power.attr,
2995 #ifdef CONFIG_IWLWIFI_DEBUG
2996         &dev_attr_debug_level.attr,
2997 #endif
2998         &dev_attr_version.attr,
2999
3000         NULL
3001 };
3002
3003 static struct attribute_group iwl_attribute_group = {
3004         .name = NULL,           /* put in device directory */
3005         .attrs = iwl_sysfs_entries,
3006 };
3007
3008 static struct ieee80211_ops iwl_hw_ops = {
3009         .tx = iwl_mac_tx,
3010         .start = iwl_mac_start,
3011         .stop = iwl_mac_stop,
3012         .add_interface = iwl_mac_add_interface,
3013         .remove_interface = iwl_mac_remove_interface,
3014         .config = iwl_mac_config,
3015         .config_interface = iwl_mac_config_interface,
3016         .configure_filter = iwl_configure_filter,
3017         .set_key = iwl_mac_set_key,
3018         .update_tkip_key = iwl_mac_update_tkip_key,
3019         .get_stats = iwl_mac_get_stats,
3020         .get_tx_stats = iwl_mac_get_tx_stats,
3021         .conf_tx = iwl_mac_conf_tx,
3022         .reset_tsf = iwl_mac_reset_tsf,
3023         .bss_info_changed = iwl_bss_info_changed,
3024         .ampdu_action = iwl_mac_ampdu_action,
3025         .hw_scan = iwl_mac_hw_scan
3026 };
3027
3028 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3029 {
3030         int err = 0;
3031         struct iwl_priv *priv;
3032         struct ieee80211_hw *hw;
3033         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3034         unsigned long flags;
3035         u16 pci_cmd;
3036
3037         /************************
3038          * 1. Allocating HW data
3039          ************************/
3040
3041         /* Disabling hardware scan means that mac80211 will perform scans
3042          * "the hard way", rather than using device's scan. */
3043         if (cfg->mod_params->disable_hw_scan) {
3044                 if (cfg->mod_params->debug & IWL_DL_INFO)
3045                         dev_printk(KERN_DEBUG, &(pdev->dev),
3046                                    "Disabling hw_scan\n");
3047                 iwl_hw_ops.hw_scan = NULL;
3048         }
3049
3050         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3051         if (!hw) {
3052                 err = -ENOMEM;
3053                 goto out;
3054         }
3055         priv = hw->priv;
3056         /* At this point both hw and priv are allocated. */
3057
3058         SET_IEEE80211_DEV(hw, &pdev->dev);
3059
3060         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3061         priv->cfg = cfg;
3062         priv->pci_dev = pdev;
3063
3064 #ifdef CONFIG_IWLWIFI_DEBUG
3065         priv->debug_level = priv->cfg->mod_params->debug;
3066         atomic_set(&priv->restrict_refcnt, 0);
3067 #endif
3068
3069         /**************************
3070          * 2. Initializing PCI bus
3071          **************************/
3072         if (pci_enable_device(pdev)) {
3073                 err = -ENODEV;
3074                 goto out_ieee80211_free_hw;
3075         }
3076
3077         pci_set_master(pdev);
3078
3079         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3080         if (!err)
3081                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3082         if (err) {
3083                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3084                 if (!err)
3085                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3086                 /* both attempts failed: */
3087                 if (err) {
3088                         IWL_WARN(priv, "No suitable DMA available.\n");
3089                         goto out_pci_disable_device;
3090                 }
3091         }
3092
3093         err = pci_request_regions(pdev, DRV_NAME);
3094         if (err)
3095                 goto out_pci_disable_device;
3096
3097         pci_set_drvdata(pdev, priv);
3098
3099
3100         /***********************
3101          * 3. Read REV register
3102          ***********************/
3103         priv->hw_base = pci_iomap(pdev, 0, 0);
3104         if (!priv->hw_base) {
3105                 err = -ENODEV;
3106                 goto out_pci_release_regions;
3107         }
3108
3109         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3110                 (unsigned long long) pci_resource_len(pdev, 0));
3111         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3112
3113         iwl_hw_detect(priv);
3114         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3115                 priv->cfg->name, priv->hw_rev);
3116
3117         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3118          * PCI Tx retries from interfering with C3 CPU state */
3119         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3120
3121         /* amp init */
3122         err = priv->cfg->ops->lib->apm_ops.init(priv);
3123         if (err < 0) {
3124                 IWL_ERR(priv, "Failed to init APMG\n");
3125                 goto out_iounmap;
3126         }
3127         /*****************
3128          * 4. Read EEPROM
3129          *****************/
3130         /* Read the EEPROM */
3131         err = iwl_eeprom_init(priv);
3132         if (err) {
3133                 IWL_ERR(priv, "Unable to init EEPROM\n");
3134                 goto out_iounmap;
3135         }
3136         err = iwl_eeprom_check_version(priv);
3137         if (err)
3138                 goto out_free_eeprom;
3139
3140         /* extract MAC Address */
3141         iwl_eeprom_get_mac(priv, priv->mac_addr);
3142         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3143         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3144
3145         /************************
3146          * 5. Setup HW constants
3147          ************************/
3148         if (iwl_set_hw_params(priv)) {
3149                 IWL_ERR(priv, "failed to set hw parameters\n");
3150                 goto out_free_eeprom;
3151         }
3152
3153         /*******************
3154          * 6. Setup priv
3155          *******************/
3156
3157         err = iwl_init_drv(priv);
3158         if (err)
3159                 goto out_free_eeprom;
3160         /* At this point both hw and priv are initialized. */
3161
3162         /**********************************
3163          * 7. Initialize module parameters
3164          **********************************/
3165
3166         /* Disable radio (SW RF KILL) via parameter when loading driver */
3167         if (priv->cfg->mod_params->disable) {
3168                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3169                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
3170         }
3171
3172         /********************
3173          * 8. Setup services
3174          ********************/
3175         spin_lock_irqsave(&priv->lock, flags);
3176         iwl_disable_interrupts(priv);
3177         spin_unlock_irqrestore(&priv->lock, flags);
3178
3179         pci_enable_msi(priv->pci_dev);
3180
3181         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3182                           DRV_NAME, priv);
3183         if (err) {
3184                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3185                 goto out_disable_msi;
3186         }
3187         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3188         if (err) {
3189                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3190                 goto out_free_irq;
3191         }
3192
3193         iwl_setup_deferred_work(priv);
3194         iwl_setup_rx_handlers(priv);
3195
3196         /**********************************
3197          * 9. Setup and register mac80211
3198          **********************************/
3199
3200         /* enable interrupts if needed: hw bug w/a */
3201         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3202         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3203                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3204                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3205         }
3206
3207         iwl_enable_interrupts(priv);
3208
3209         err = iwl_setup_mac(priv);
3210         if (err)
3211                 goto out_remove_sysfs;
3212
3213         err = iwl_dbgfs_register(priv, DRV_NAME);
3214         if (err)
3215                 IWL_ERR(priv, "failed to create debugfs files\n");
3216
3217         /* If platform's RF_KILL switch is NOT set to KILL */
3218         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3219                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3220         else
3221                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3222
3223         err = iwl_rfkill_init(priv);
3224         if (err)
3225                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3226                                   "Ignoring error: %d\n", err);
3227         else
3228                 iwl_rfkill_set_hw_state(priv);
3229
3230         iwl_power_initialize(priv);
3231         return 0;
3232
3233  out_remove_sysfs:
3234         destroy_workqueue(priv->workqueue);
3235         priv->workqueue = NULL;
3236         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3237  out_free_irq:
3238         free_irq(priv->pci_dev->irq, priv);
3239  out_disable_msi:
3240         pci_disable_msi(priv->pci_dev);
3241         iwl_uninit_drv(priv);
3242  out_free_eeprom:
3243         iwl_eeprom_free(priv);
3244  out_iounmap:
3245         pci_iounmap(pdev, priv->hw_base);
3246  out_pci_release_regions:
3247         pci_set_drvdata(pdev, NULL);
3248         pci_release_regions(pdev);
3249  out_pci_disable_device:
3250         pci_disable_device(pdev);
3251  out_ieee80211_free_hw:
3252         ieee80211_free_hw(priv->hw);
3253  out:
3254         return err;
3255 }
3256
3257 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3258 {
3259         struct iwl_priv *priv = pci_get_drvdata(pdev);
3260         unsigned long flags;
3261
3262         if (!priv)
3263                 return;
3264
3265         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3266
3267         iwl_dbgfs_unregister(priv);
3268         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3269
3270         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3271          * to be called and iwl_down since we are removing the device
3272          * we need to set STATUS_EXIT_PENDING bit.
3273          */
3274         set_bit(STATUS_EXIT_PENDING, &priv->status);
3275         if (priv->mac80211_registered) {
3276                 ieee80211_unregister_hw(priv->hw);
3277                 priv->mac80211_registered = 0;
3278         } else {
3279                 iwl_down(priv);
3280         }
3281
3282         /* make sure we flush any pending irq or
3283          * tasklet for the driver
3284          */
3285         spin_lock_irqsave(&priv->lock, flags);
3286         iwl_disable_interrupts(priv);
3287         spin_unlock_irqrestore(&priv->lock, flags);
3288
3289         iwl_synchronize_irq(priv);
3290
3291         iwl_rfkill_unregister(priv);
3292         iwl_dealloc_ucode_pci(priv);
3293
3294         if (priv->rxq.bd)
3295                 iwl_rx_queue_free(priv, &priv->rxq);
3296         iwl_hw_txq_ctx_free(priv);
3297
3298         priv->cfg->ops->smgmt->clear_station_table(priv);
3299         iwl_eeprom_free(priv);
3300
3301
3302         /*netif_stop_queue(dev); */
3303         flush_workqueue(priv->workqueue);
3304
3305         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3306          * priv->workqueue... so we can't take down the workqueue
3307          * until now... */
3308         destroy_workqueue(priv->workqueue);
3309         priv->workqueue = NULL;
3310
3311         free_irq(priv->pci_dev->irq, priv);
3312         pci_disable_msi(priv->pci_dev);
3313         pci_iounmap(pdev, priv->hw_base);
3314         pci_release_regions(pdev);
3315         pci_disable_device(pdev);
3316         pci_set_drvdata(pdev, NULL);
3317
3318         iwl_uninit_drv(priv);
3319
3320         if (priv->ibss_beacon)
3321                 dev_kfree_skb(priv->ibss_beacon);
3322
3323         ieee80211_free_hw(priv->hw);
3324 }
3325
3326
3327 /*****************************************************************************
3328  *
3329  * driver and module entry point
3330  *
3331  *****************************************************************************/
3332
3333 /* Hardware specific file defines the PCI IDs table for that hardware module */
3334 static struct pci_device_id iwl_hw_card_ids[] = {
3335 #ifdef CONFIG_IWL4965
3336         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3337         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3338 #endif /* CONFIG_IWL4965 */
3339 #ifdef CONFIG_IWL5000
3340         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3341         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3342         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3343         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3344         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3345         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3346         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3347         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3348         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3349         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3350 /* 5350 WiFi/WiMax */
3351         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3352         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3353         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3354 /* 5150 Wifi/WiMax */
3355         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3356         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3357 /* 6000/6050 Series */
3358         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3359         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3360         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3361         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3362         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3363         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3364         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3365         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3366         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3367         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3368         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3369 /* 1000 Series WiFi */
3370         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
3371         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
3372 #endif /* CONFIG_IWL5000 */
3373
3374         {0}
3375 };
3376 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3377
3378 static struct pci_driver iwl_driver = {
3379         .name = DRV_NAME,
3380         .id_table = iwl_hw_card_ids,
3381         .probe = iwl_pci_probe,
3382         .remove = __devexit_p(iwl_pci_remove),
3383 #ifdef CONFIG_PM
3384         .suspend = iwl_pci_suspend,
3385         .resume = iwl_pci_resume,
3386 #endif
3387 };
3388
3389 static int __init iwl_init(void)
3390 {
3391
3392         int ret;
3393         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3394         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3395
3396         ret = iwlagn_rate_control_register();
3397         if (ret) {
3398                 printk(KERN_ERR DRV_NAME
3399                        "Unable to register rate control algorithm: %d\n", ret);
3400                 return ret;
3401         }
3402
3403         ret = pci_register_driver(&iwl_driver);
3404         if (ret) {
3405                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3406                 goto error_register;
3407         }
3408
3409         return ret;
3410
3411 error_register:
3412         iwlagn_rate_control_unregister();
3413         return ret;
3414 }
3415
3416 static void __exit iwl_exit(void)
3417 {
3418         pci_unregister_driver(&iwl_driver);
3419         iwlagn_rate_control_unregister();
3420 }
3421
3422 module_exit(iwl_exit);
3423 module_init(iwl_init);