SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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->cfg->mod_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         iwl_clear_stations_table(priv);
 192
 193         priv->start_calib = 0;
 194
 195         /* Add the broadcast address so we can send broadcast frames */
 196         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 197                                                 IWL_INVALID_STATION) {
 198                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 199                 return -EIO;
 200         }
 201
 202         /* If we have set the ASSOC_MSK and we are in BSS mode then
 203          * add the IWL_AP_ID to the station rate table */
 204         if (new_assoc) {
 205                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 206                         ret = iwl_rxon_add_station(priv,
 207                                            priv->active_rxon.bssid_addr, 1);
 208                         if (ret == IWL_INVALID_STATION) {
 209                                 IWL_ERR(priv,
 210                                         "Error adding AP address for TX.\n");
 211                                 return -EIO;
 212                         }
 213                         priv->assoc_station_added = 1;
 214                         if (priv->default_wep_key &&
 215                             iwl_send_static_wepkey_cmd(priv, 0))
 216                                 IWL_ERR(priv,
 217                                         "Could not send WEP static key.\n");
 218                 }
 219
 220                 /* Apply the new configuration
 221                  * RXON assoc doesn't clear the station table in uCode,
 222                  */
 223                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 224                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 225                 if (ret) {
 226                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 227                         return ret;
 228                 }
 229                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 230         }
 231
 232         iwl_init_sensitivity(priv);
 233
 234         /* If we issue a new RXON command which required a tune then we must
 235          * send a new TXPOWER command or we won't be able to Tx any frames */
 236         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 237         if (ret) {
 238                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 239                 return ret;
 240         }
 241
 242         return 0;
 243 }
 244
 245 void iwl_update_chain_flags(struct iwl_priv *priv)
 246 {
 247
 248         if (priv->cfg->ops->hcmd->set_rxon_chain)
 249                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 250         iwlcore_commit_rxon(priv);
 251 }
 252
 253 static void iwl_clear_free_frames(struct iwl_priv *priv)
 254 {
 255         struct list_head *element;
 256
 257         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 258                        priv->frames_count);
 259
 260         while (!list_empty(&priv->free_frames)) {
 261                 element = priv->free_frames.next;
 262                 list_del(element);
 263                 kfree(list_entry(element, struct iwl_frame, list));
 264                 priv->frames_count--;
 265         }
 266
 267         if (priv->frames_count) {
 268                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 269                             priv->frames_count);
 270                 priv->frames_count = 0;
 271         }
 272 }
 273
 274 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 275 {
 276         struct iwl_frame *frame;
 277         struct list_head *element;
 278         if (list_empty(&priv->free_frames)) {
 279                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 280                 if (!frame) {
 281                         IWL_ERR(priv, "Could not allocate frame!\n");
 282                         return NULL;
 283                 }
 284
 285                 priv->frames_count++;
 286                 return frame;
 287         }
 288
 289         element = priv->free_frames.next;
 290         list_del(element);
 291         return list_entry(element, struct iwl_frame, list);
 292 }
 293
 294 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 295 {
 296         memset(frame, 0, sizeof(*frame));
 297         list_add(&frame->list, &priv->free_frames);
 298 }
 299
 300 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 301                                           struct ieee80211_hdr *hdr,
 302                                           int left)
 303 {
 304         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 305             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 306              (priv->iw_mode != NL80211_IFTYPE_AP)))
 307                 return 0;
 308
 309         if (priv->ibss_beacon->len > left)
 310                 return 0;
 311
 312         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 313
 314         return priv->ibss_beacon->len;
 315 }
 316
 317 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 318                                        struct iwl_frame *frame, u8 rate)
 319 {
 320         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 321         unsigned int frame_size;
 322
 323         tx_beacon_cmd = &frame->u.beacon;
 324         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 325
 326         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 327         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 328
 329         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 330                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 331
 332         BUG_ON(frame_size > MAX_MPDU_SIZE);
 333         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 334
 335         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 336                 tx_beacon_cmd->tx.rate_n_flags =
 337                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 338         else
 339                 tx_beacon_cmd->tx.rate_n_flags =
 340                         iwl_hw_set_rate_n_flags(rate, 0);
 341
 342         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 343                                      TX_CMD_FLG_TSF_MSK |
 344                                      TX_CMD_FLG_STA_RATE_MSK;
 345
 346         return sizeof(*tx_beacon_cmd) + frame_size;
 347 }
 348 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 349 {
 350         struct iwl_frame *frame;
 351         unsigned int frame_size;
 352         int rc;
 353         u8 rate;
 354
 355         frame = iwl_get_free_frame(priv);
 356
 357         if (!frame) {
 358                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 359                           "command.\n");
 360                 return -ENOMEM;
 361         }
 362
 363         rate = iwl_rate_get_lowest_plcp(priv);
 364
 365         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 366
 367         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 368                               &frame->u.cmd[0]);
 369
 370         iwl_free_frame(priv, frame);
 371
 372         return rc;
 373 }
 374
 375 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 376 {
 377         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 378
 379         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 380         if (sizeof(dma_addr_t) > sizeof(u32))
 381                 addr |=
 382                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 383
 384         return addr;
 385 }
 386
 387 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 388 {
 389         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 390
 391         return le16_to_cpu(tb->hi_n_len) >> 4;
 392 }
 393
 394 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 395                                   dma_addr_t addr, u16 len)
 396 {
 397         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 398         u16 hi_n_len = len << 4;
 399
 400         put_unaligned_le32(addr, &tb->lo);
 401         if (sizeof(dma_addr_t) > sizeof(u32))
 402                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 403
 404         tb->hi_n_len = cpu_to_le16(hi_n_len);
 405
 406         tfd->num_tbs = idx + 1;
 407 }
 408
 409 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 410 {
 411         return tfd->num_tbs & 0x1f;
 412 }
 413
 414 /**
 415  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 416  * @priv - driver private data
 417  * @txq - tx queue
 418  *
 419  * Does NOT advance any TFD circular buffer read/write indexes
 420  * Does NOT free the TFD itself (which is within circular buffer)
 421  */
 422 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 423 {
 424         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 425         struct iwl_tfd *tfd;
 426         struct pci_dev *dev = priv->pci_dev;
 427         int index = txq->q.read_ptr;
 428         int i;
 429         int num_tbs;
 430
 431         tfd = &tfd_tmp[index];
 432
 433         /* Sanity check on number of chunks */
 434         num_tbs = iwl_tfd_get_num_tbs(tfd);
 435
 436         if (num_tbs >= IWL_NUM_OF_TBS) {
 437                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 438                 /* @todo issue fatal error, it is quite serious situation */
 439                 return;
 440         }
 441
 442         /* Unmap tx_cmd */
 443         if (num_tbs)
 444                 pci_unmap_single(dev,
 445                                 pci_unmap_addr(&txq->meta[index], mapping),
 446                                 pci_unmap_len(&txq->meta[index], len),
 447                                 PCI_DMA_BIDIRECTIONAL);
 448
 449         /* Unmap chunks, if any. */
 450         for (i = 1; i < num_tbs; i++) {
 451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 453
 454                 if (txq->txb) {
 455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 457                 }
 458         }
 459 }
 460
 461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 462                                  struct iwl_tx_queue *txq,
 463                                  dma_addr_t addr, u16 len,
 464                                  u8 reset, u8 pad)
 465 {
 466         struct iwl_queue *q;
 467         struct iwl_tfd *tfd, *tfd_tmp;
 468         u32 num_tbs;
 469
 470         q = &txq->q;
 471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 472         tfd = &tfd_tmp[q->write_ptr];
 473
 474         if (reset)
 475                 memset(tfd, 0, sizeof(*tfd));
 476
 477         num_tbs = iwl_tfd_get_num_tbs(tfd);
 478
 479         /* Each TFD can point to a maximum 20 Tx buffers */
 480         if (num_tbs >= IWL_NUM_OF_TBS) {
 481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 482                           IWL_NUM_OF_TBS);
 483                 return -EINVAL;
 484         }
 485
 486         BUG_ON(addr & ~DMA_BIT_MASK(36));
 487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 488                 IWL_ERR(priv, "Unaligned address = %llx\n",
 489                           (unsigned long long)addr);
 490
 491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 498  * given Tx queue, and enable the DMA channel used for that queue.
 499  *
 500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 501  * channels supported in hardware.
 502  */
 503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 504                          struct iwl_tx_queue *txq)
 505 {
 506         int txq_id = txq->q.id;
 507
 508         /* Circular buffer (TFD queue in DRAM) physical base address */
 509         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 510                              txq->q.dma_addr >> 8);
 511
 512         return 0;
 513 }
 514
 515 /******************************************************************************
 516  *
 517  * Generic RX handler implementations
 518  *
 519  ******************************************************************************/
 520 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 521                                 struct iwl_rx_mem_buffer *rxb)
 522 {
 523         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 524         struct iwl_alive_resp *palive;
 525         struct delayed_work *pwork;
 526
 527         palive = &pkt->u.alive_frame;
 528
 529         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 530                        "0x%01X 0x%01X\n",
 531                        palive->is_valid, palive->ver_type,
 532                        palive->ver_subtype);
 533
 534         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 535                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 536                 set_bit(STATUS_INIT_UCODE_ALIVE, &priv->status);
 537                 wake_up_interruptible(&priv->wait_command_queue);
 538                 memcpy(&priv->card_alive_init,
 539                        &pkt->u.alive_frame,
 540                        sizeof(struct iwl_init_alive_resp));
 541                 pwork = &priv->init_alive_start;
 542         } else {
 543                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 544                 set_bit(STATUS_RT_UCODE_ALIVE, &priv->status);
 545                 wake_up_interruptible(&priv->wait_command_queue);
 546                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 547                        sizeof(struct iwl_alive_resp));
 548                 pwork = &priv->alive_start;
 549         }
 550
 551         /* We delay the ALIVE response by 5ms to
 552          * give the HW RF Kill time to activate... */
 553         if (palive->is_valid == UCODE_VALID_OK)
 554                 queue_delayed_work(priv->workqueue, pwork,
 555                                    msecs_to_jiffies(5));
 556         else
 557                 IWL_WARN(priv, "uCode did not respond OK.\n");
 558 }
 559
 560 static void iwl_bg_beacon_update(struct work_struct *work)
 561 {
 562         struct iwl_priv *priv =
 563                 container_of(work, struct iwl_priv, beacon_update);
 564         struct sk_buff *beacon;
 565
 566         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 567         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 568
 569         if (!beacon) {
 570                 IWL_ERR(priv, "update beacon failed\n");
 571                 return;
 572         }
 573
 574         mutex_lock(&priv->mutex);
 575         /* new beacon skb is allocated every time; dispose previous.*/
 576         if (priv->ibss_beacon)
 577                 dev_kfree_skb(priv->ibss_beacon);
 578
 579         priv->ibss_beacon = beacon;
 580         mutex_unlock(&priv->mutex);
 581
 582         iwl_send_beacon_cmd(priv);
 583 }
 584
 585 /**
 586  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 587  *
 588  * This callback is provided in order to send a statistics request.
 589  *
 590  * This timer function is continually reset to execute within
 591  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 592  * was received.  We need to ensure we receive the statistics in order
 593  * to update the temperature used for calibrating the TXPOWER.
 594  */
 595 static void iwl_bg_statistics_periodic(unsigned long data)
 596 {
 597         struct iwl_priv *priv = (struct iwl_priv *)data;
 598
 599         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 600                 return;
 601
 602         /* dont send host command if rf-kill is on */
 603         if (!iwl_is_ready_rf(priv))
 604                 return;
 605
 606         iwl_send_statistics_request(priv, CMD_ASYNC);
 607 }
 608
 609 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 610                                 struct iwl_rx_mem_buffer *rxb)
 611 {
 612 #ifdef CONFIG_IWLWIFI_DEBUG
 613         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 614         struct iwl4965_beacon_notif *beacon =
 615                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 616         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 617
 618         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 619                 "tsf %d %d rate %d\n",
 620                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 621                 beacon->beacon_notify_hdr.failure_frame,
 622                 le32_to_cpu(beacon->ibss_mgr_status),
 623                 le32_to_cpu(beacon->high_tsf),
 624                 le32_to_cpu(beacon->low_tsf), rate);
 625 #endif
 626
 627         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 628             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 629                 queue_work(priv->workqueue, &priv->beacon_update);
 630 }
 631
 632 /* Handle notification from uCode that card's power state is changing
 633  * due to software, hardware, or critical temperature RFKILL */
 634 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 635                                     struct iwl_rx_mem_buffer *rxb)
 636 {
 637         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 638         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 639         unsigned long status = priv->status;
 640
 641         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 642                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 643                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 644
 645         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 646                      RF_CARD_DISABLED)) {
 647
 648                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 649                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 650
 651                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 652                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 653
 654                 if (!(flags & RXON_CARD_DISABLED)) {
 655                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 656                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 657                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 658                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 659                 }
 660                 if (flags & RF_CARD_DISABLED)
 661                         iwl_tt_enter_ct_kill(priv);
 662         }
 663         if (!(flags & RF_CARD_DISABLED))
 664                 iwl_tt_exit_ct_kill(priv);
 665
 666         if (flags & HW_CARD_DISABLED)
 667                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 668         else
 669                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 670
 671
 672         if (!(flags & RXON_CARD_DISABLED))
 673                 iwl_scan_cancel(priv);
 674
 675         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 676              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 677                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 678                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 679         else
 680                 wake_up_interruptible(&priv->wait_command_queue);
 681 }
 682
 683 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 684 {
 685         if (src == IWL_PWR_SRC_VAUX) {
 686                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 687                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 688                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 689                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 690         } else {
 691                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 692                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 693                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 694         }
 695
 696         return 0;
 697 }
 698
 699 /**
 700  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 701  *
 702  * Setup the RX handlers for each of the reply types sent from the uCode
 703  * to the host.
 704  *
 705  * This function chains into the hardware specific files for them to setup
 706  * any hardware specific handlers as well.
 707  */
 708 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 709 {
 710         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 711         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 712         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 713         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 714         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 715             iwl_rx_pm_debug_statistics_notif;
 716         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 717
 718         /*
 719          * The same handler is used for both the REPLY to a discrete
 720          * statistics request from the host as well as for the periodic
 721          * statistics notifications (after received beacons) from the uCode.
 722          */
 723         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 724         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 725
 726         iwl_setup_spectrum_handlers(priv);
 727         iwl_setup_rx_scan_handlers(priv);
 728
 729         /* status change handler */
 730         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 731
 732         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 733             iwl_rx_missed_beacon_notif;
 734         /* Rx handlers */
 735         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 736         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 737         /* block ack */
 738         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 739         /* Set up hardware specific Rx handlers */
 740         priv->cfg->ops->lib->rx_handler_setup(priv);
 741 }
 742
 743 /**
 744  * iwl_rx_handle - Main entry function for receiving responses from uCode
 745  *
 746  * Uses the priv->rx_handlers callback function array to invoke
 747  * the appropriate handlers, including command responses,
 748  * frame-received notifications, and other notifications.
 749  */
 750 void iwl_rx_handle(struct iwl_priv *priv)
 751 {
 752         struct iwl_rx_mem_buffer *rxb;
 753         struct iwl_rx_packet *pkt;
 754         struct iwl_rx_queue *rxq = &priv->rxq;
 755         u32 r, i;
 756         int reclaim;
 757         unsigned long flags;
 758         u8 fill_rx = 0;
 759         u32 count = 8;
 760         int total_empty;
 761
 762         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 763          * buffer that the driver may process (last buffer filled by ucode). */
 764         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 765         i = rxq->read;
 766
 767         /* Rx interrupt, but nothing sent from uCode */
 768         if (i == r)
 769                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 770
 771         /* calculate total frames need to be restock after handling RX */
 772         total_empty = r - priv->rxq.write_actual;
 773         if (total_empty < 0)
 774                 total_empty += RX_QUEUE_SIZE;
 775
 776         if (total_empty > (RX_QUEUE_SIZE / 2))
 777                 fill_rx = 1;
 778
 779         while (i != r) {
 780                 rxb = rxq->queue[i];
 781
 782                 /* If an RXB doesn't have a Rx queue slot associated with it,
 783                  * then a bug has been introduced in the queue refilling
 784                  * routines -- catch it here */
 785                 BUG_ON(rxb == NULL);
 786
 787                 rxq->queue[i] = NULL;
 788
 789                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
 790                                  priv->hw_params.rx_buf_size + 256,
 791                                  PCI_DMA_FROMDEVICE);
 792                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 793
 794                 /* Reclaim a command buffer only if this packet is a response
 795                  *   to a (driver-originated) command.
 796                  * If the packet (e.g. Rx frame) originated from uCode,
 797                  *   there is no command buffer to reclaim.
 798                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 799                  *   but apparently a few don't get set; catch them here. */
 800                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 801                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 802                         (pkt->hdr.cmd != REPLY_RX) &&
 803                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 804                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 805                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 806                         (pkt->hdr.cmd != REPLY_TX);
 807
 808                 /* Based on type of command response or notification,
 809                  *   handle those that need handling via function in
 810                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 811                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 812                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 813                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 814                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 815                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 816                 } else {
 817                         /* No handling needed */
 818                         IWL_DEBUG_RX(priv,
 819                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 820                                 r, i, get_cmd_string(pkt->hdr.cmd),
 821                                 pkt->hdr.cmd);
 822                 }
 823
 824                 if (reclaim) {
 825                         /* Invoke any callbacks, transfer the skb to caller, and
 826                          * fire off the (possibly) blocking iwl_send_cmd()
 827                          * as we reclaim the driver command queue */
 828                         if (rxb && rxb->skb)
 829                                 iwl_tx_cmd_complete(priv, rxb);
 830                         else
 831                                 IWL_WARN(priv, "Claim null rxb?\n");
 832                 }
 833
 834                 /* For now we just don't re-use anything.  We can tweak this
 835                  * later to try and re-use notification packets and SKBs that
 836                  * fail to Rx correctly */
 837                 if (rxb->skb != NULL) {
 838                         priv->alloc_rxb_skb--;
 839                         dev_kfree_skb_any(rxb->skb);
 840                         rxb->skb = NULL;
 841                 }
 842
 843                 spin_lock_irqsave(&rxq->lock, flags);
 844                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
 845                 spin_unlock_irqrestore(&rxq->lock, flags);
 846                 i = (i + 1) & RX_QUEUE_MASK;
 847                 /* If there are a lot of unused frames,
 848                  * restock the Rx queue so ucode wont assert. */
 849                 if (fill_rx) {
 850                         count++;
 851                         if (count >= 8) {
 852                                 priv->rxq.read = i;
 853                                 iwl_rx_replenish_now(priv);
 854                                 count = 0;
 855                         }
 856                 }
 857         }
 858
 859         /* Backtrack one entry */
 860         priv->rxq.read = i;
 861         if (fill_rx)
 862                 iwl_rx_replenish_now(priv);
 863         else
 864                 iwl_rx_queue_restock(priv);
 865 }
 866
 867 /* call this function to flush any scheduled tasklet */
 868 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 869 {
 870         /* wait to make sure we flush pending tasklet*/
 871         synchronize_irq(priv->pci_dev->irq);
 872         tasklet_kill(&priv->irq_tasklet);
 873 }
 874
 875 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
 876 {
 877         u32 inta, handled = 0;
 878         u32 inta_fh;
 879         unsigned long flags;
 880 #ifdef CONFIG_IWLWIFI_DEBUG
 881         u32 inta_mask;
 882 #endif
 883
 884         spin_lock_irqsave(&priv->lock, flags);
 885
 886         /* Ack/clear/reset pending uCode interrupts.
 887          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 888          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
 889         inta = iwl_read32(priv, CSR_INT);
 890         iwl_write32(priv, CSR_INT, inta);
 891
 892         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
 893          * Any new interrupts that happen after this, either while we're
 894          * in this tasklet, or later, will show up in next ISR/tasklet. */
 895         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
 896         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
 897
 898 #ifdef CONFIG_IWLWIFI_DEBUG
 899         if (iwl_debug_level & IWL_DL_ISR) {
 900                 /* just for debug */
 901                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 902                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
 903                               inta, inta_mask, inta_fh);
 904         }
 905 #endif
 906
 907         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
 908          * atomic, make sure that inta covers all the interrupts that
 909          * we've discovered, even if FH interrupt came in just after
 910          * reading CSR_INT. */
 911         if (inta_fh & CSR49_FH_INT_RX_MASK)
 912                 inta |= CSR_INT_BIT_FH_RX;
 913         if (inta_fh & CSR49_FH_INT_TX_MASK)
 914                 inta |= CSR_INT_BIT_FH_TX;
 915
 916         /* Now service all interrupt bits discovered above. */
 917         if (inta & CSR_INT_BIT_HW_ERR) {
 918                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 919
 920                 /* Tell the device to stop sending interrupts */
 921                 iwl_disable_interrupts(priv);
 922
 923                 priv->isr_stats.hw++;
 924                 iwl_irq_handle_error(priv);
 925
 926                 handled |= CSR_INT_BIT_HW_ERR;
 927
 928                 spin_unlock_irqrestore(&priv->lock, flags);
 929
 930                 return;
 931         }
 932
 933 #ifdef CONFIG_IWLWIFI_DEBUG
 934         if (iwl_debug_level & (IWL_DL_ISR)) {
 935                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
 936                 if (inta & CSR_INT_BIT_SCD) {
 937                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
 938                                       "the frame/frames.\n");
 939                         priv->isr_stats.sch++;
 940                 }
 941
 942                 /* Alive notification via Rx interrupt will do the real work */
 943                 if (inta & CSR_INT_BIT_ALIVE) {
 944                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
 945                         priv->isr_stats.alive++;
 946                 }
 947         }
 948 #endif
 949         /* Safely ignore these bits for debug checks below */
 950         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
 951
 952         /* HW RF KILL switch toggled */
 953         if (inta & CSR_INT_BIT_RF_KILL) {
 954                 int hw_rf_kill = 0;
 955                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
 956                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
 957                         hw_rf_kill = 1;
 958
 959                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
 960                                 hw_rf_kill ? "disable radio" : "enable radio");
 961
 962                 priv->isr_stats.rfkill++;
 963
 964                 /* driver only loads ucode once setting the interface up.
 965                  * the driver allows loading the ucode even if the radio
 966                  * is killed. Hence update the killswitch state here. The
 967                  * rfkill handler will care about restarting if needed.
 968                  */
 969                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
 970                         if (hw_rf_kill)
 971                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 972                         else
 973                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 974                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
 975                 }
 976
 977                 handled |= CSR_INT_BIT_RF_KILL;
 978         }
 979
 980         /* Chip got too hot and stopped itself */
 981         if (inta & CSR_INT_BIT_CT_KILL) {
 982                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
 983                 priv->isr_stats.ctkill++;
 984                 handled |= CSR_INT_BIT_CT_KILL;
 985         }
 986
 987         /* Error detected by uCode */
 988         if (inta & CSR_INT_BIT_SW_ERR) {
 989                 IWL_ERR(priv, "Microcode SW error detected. "
 990                         " Restarting 0x%X.\n", inta);
 991                 priv->isr_stats.sw++;
 992                 priv->isr_stats.sw_err = inta;
 993                 iwl_irq_handle_error(priv);
 994                 handled |= CSR_INT_BIT_SW_ERR;
 995         }
 996
 997         /* uCode wakes up after power-down sleep */
 998         if (inta & CSR_INT_BIT_WAKEUP) {
 999                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1000                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1001                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1002                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1003                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1004                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1005                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1006                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1007
1008                 priv->isr_stats.wakeup++;
1009
1010                 handled |= CSR_INT_BIT_WAKEUP;
1011         }
1012
1013         /* All uCode command responses, including Tx command responses,
1014          * Rx "responses" (frame-received notification), and other
1015          * notifications from uCode come through here*/
1016         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1017                 iwl_rx_handle(priv);
1018                 priv->isr_stats.rx++;
1019                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1020         }
1021
1022         if (inta & CSR_INT_BIT_FH_TX) {
1023                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1024                 priv->isr_stats.tx++;
1025                 handled |= CSR_INT_BIT_FH_TX;
1026                 /* FH finished to write, send event */
1027                 priv->ucode_write_complete = 1;
1028                 wake_up_interruptible(&priv->wait_command_queue);
1029         }
1030
1031         if (inta & ~handled) {
1032                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1033                 priv->isr_stats.unhandled++;
1034         }
1035
1036         if (inta & ~(priv->inta_mask)) {
1037                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1038                          inta & ~priv->inta_mask);
1039                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1040         }
1041
1042         /* Re-enable all interrupts */
1043         /* only Re-enable if diabled by irq */
1044         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1045                 iwl_enable_interrupts(priv);
1046
1047 #ifdef CONFIG_IWLWIFI_DEBUG
1048         if (iwl_debug_level & (IWL_DL_ISR)) {
1049                 inta = iwl_read32(priv, CSR_INT);
1050                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1051                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1052                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1053                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1054         }
1055 #endif
1056         spin_unlock_irqrestore(&priv->lock, flags);
1057 }
1058
1059 /* tasklet for iwlagn interrupt */
1060 static void iwl_irq_tasklet(struct iwl_priv *priv)
1061 {
1062         u32 inta = 0;
1063         u32 handled = 0;
1064         unsigned long flags;
1065 #ifdef CONFIG_IWLWIFI_DEBUG
1066         u32 inta_mask;
1067 #endif
1068
1069         spin_lock_irqsave(&priv->lock, flags);
1070
1071         /* Ack/clear/reset pending uCode interrupts.
1072          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1073          */
1074         iwl_write32(priv, CSR_INT, priv->inta);
1075
1076         inta = priv->inta;
1077
1078 #ifdef CONFIG_IWLWIFI_DEBUG
1079         if (iwl_debug_level & IWL_DL_ISR) {
1080                 /* just for debug */
1081                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1082                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1083                                 inta, inta_mask);
1084         }
1085 #endif
1086         /* saved interrupt in inta variable now we can reset priv->inta */
1087         priv->inta = 0;
1088
1089         /* Now service all interrupt bits discovered above. */
1090         if (inta & CSR_INT_BIT_HW_ERR) {
1091                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1092
1093                 /* Tell the device to stop sending interrupts */
1094                 iwl_disable_interrupts(priv);
1095
1096                 priv->isr_stats.hw++;
1097                 iwl_irq_handle_error(priv);
1098
1099                 handled |= CSR_INT_BIT_HW_ERR;
1100
1101                 spin_unlock_irqrestore(&priv->lock, flags);
1102
1103                 return;
1104         }
1105
1106 #ifdef CONFIG_IWLWIFI_DEBUG
1107         if (iwl_debug_level & (IWL_DL_ISR)) {
1108                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1109                 if (inta & CSR_INT_BIT_SCD) {
1110                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1111                                       "the frame/frames.\n");
1112                         priv->isr_stats.sch++;
1113                 }
1114
1115                 /* Alive notification via Rx interrupt will do the real work */
1116                 if (inta & CSR_INT_BIT_ALIVE) {
1117                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1118                         priv->isr_stats.alive++;
1119                 }
1120         }
1121 #endif
1122         /* Safely ignore these bits for debug checks below */
1123         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1124
1125         /* HW RF KILL switch toggled */
1126         if (inta & CSR_INT_BIT_RF_KILL) {
1127                 int hw_rf_kill = 0;
1128                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1129                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1130                         hw_rf_kill = 1;
1131
1132                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1133                                 hw_rf_kill ? "disable radio" : "enable radio");
1134
1135                 priv->isr_stats.rfkill++;
1136
1137                 /* driver only loads ucode once setting the interface up.
1138                  * the driver allows loading the ucode even if the radio
1139                  * is killed. Hence update the killswitch state here. The
1140                  * rfkill handler will care about restarting if needed.
1141                  */
1142                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1143                         if (hw_rf_kill)
1144                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1145                         else
1146                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1147                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1148                 }
1149
1150                 handled |= CSR_INT_BIT_RF_KILL;
1151         }
1152
1153         /* Chip got too hot and stopped itself */
1154         if (inta & CSR_INT_BIT_CT_KILL) {
1155                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1156                 priv->isr_stats.ctkill++;
1157                 handled |= CSR_INT_BIT_CT_KILL;
1158         }
1159
1160         /* Error detected by uCode */
1161         if (inta & CSR_INT_BIT_SW_ERR) {
1162                 IWL_ERR(priv, "Microcode SW error detected. "
1163                         " Restarting 0x%X.\n", inta);
1164                 priv->isr_stats.sw++;
1165                 priv->isr_stats.sw_err = inta;
1166                 iwl_irq_handle_error(priv);
1167                 handled |= CSR_INT_BIT_SW_ERR;
1168         }
1169
1170         /* uCode wakes up after power-down sleep */
1171         if (inta & CSR_INT_BIT_WAKEUP) {
1172                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1173                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1174                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1175                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1176                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1177                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1178                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1179                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1180
1181                 priv->isr_stats.wakeup++;
1182
1183                 handled |= CSR_INT_BIT_WAKEUP;
1184         }
1185
1186         /* All uCode command responses, including Tx command responses,
1187          * Rx "responses" (frame-received notification), and other
1188          * notifications from uCode come through here*/
1189         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1190                         CSR_INT_BIT_RX_PERIODIC)) {
1191                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1192                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1193                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1194                         iwl_write32(priv, CSR_FH_INT_STATUS,
1195                                         CSR49_FH_INT_RX_MASK);
1196                 }
1197                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1198                         handled |= CSR_INT_BIT_RX_PERIODIC;
1199                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1200                 }
1201                 /* Sending RX interrupt require many steps to be done in the
1202                  * the device:
1203                  * 1- write interrupt to current index in ICT table.
1204                  * 2- dma RX frame.
1205                  * 3- update RX shared data to indicate last write index.
1206                  * 4- send interrupt.
1207                  * This could lead to RX race, driver could receive RX interrupt
1208                  * but the shared data changes does not reflect this.
1209                  * this could lead to RX race, RX periodic will solve this race
1210                  */
1211                 iwl_write32(priv, CSR_INT_PERIODIC_REG,
1212                             CSR_INT_PERIODIC_DIS);
1213                 iwl_rx_handle(priv);
1214                 /* Only set RX periodic if real RX is received. */
1215                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1216                         iwl_write32(priv, CSR_INT_PERIODIC_REG,
1217                                     CSR_INT_PERIODIC_ENA);
1218
1219                 priv->isr_stats.rx++;
1220         }
1221
1222         if (inta & CSR_INT_BIT_FH_TX) {
1223                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1224                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1225                 priv->isr_stats.tx++;
1226                 handled |= CSR_INT_BIT_FH_TX;
1227                 /* FH finished to write, send event */
1228                 priv->ucode_write_complete = 1;
1229                 wake_up_interruptible(&priv->wait_command_queue);
1230         }
1231
1232         if (inta & ~handled) {
1233                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1234                 priv->isr_stats.unhandled++;
1235         }
1236
1237         if (inta & ~(priv->inta_mask)) {
1238                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1239                          inta & ~priv->inta_mask);
1240         }
1241
1242
1243         /* Re-enable all interrupts */
1244         /* only Re-enable if diabled by irq */
1245         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1246                 iwl_enable_interrupts(priv);
1247
1248         spin_unlock_irqrestore(&priv->lock, flags);
1249
1250 }
1251
1252
1253 /******************************************************************************
1254  *
1255  * uCode download functions
1256  *
1257  ******************************************************************************/
1258
1259 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1260 {
1261         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1262         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1263         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1264         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1265         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1266         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1267 }
1268
1269 static void iwl_nic_start(struct iwl_priv *priv)
1270 {
1271         /* Remove all resets to allow NIC to operate */
1272         iwl_write32(priv, CSR_RESET, 0);
1273 }
1274
1275
1276 /**
1277  * iwl_read_ucode - Read uCode images from disk file.
1278  *
1279  * Copy into buffers for card to fetch via bus-mastering
1280  */
1281 static int iwl_read_ucode(struct iwl_priv *priv)
1282 {
1283         struct iwl_ucode_header *ucode;
1284         int ret = -EINVAL, index;
1285         const struct firmware *ucode_raw;
1286         const char *name_pre = priv->cfg->fw_name_pre;
1287         const unsigned int api_max = priv->cfg->ucode_api_max;
1288         const unsigned int api_min = priv->cfg->ucode_api_min;
1289         char buf[25];
1290         u8 *src;
1291         size_t len;
1292         u32 api_ver, build;
1293         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1294
1295         /* Ask kernel firmware_class module to get the boot firmware off disk.
1296          * request_firmware() is synchronous, file is in memory on return. */
1297         for (index = api_max; index >= api_min; index--) {
1298                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1299                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1300                 if (ret < 0) {
1301                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1302                                   buf, ret);
1303                         if (ret == -ENOENT)
1304                                 continue;
1305                         else
1306                                 goto error;
1307                 } else {
1308                         if (index < api_max)
1309                                 IWL_ERR(priv, "Loaded firmware %s, "
1310                                         "which is deprecated. "
1311                                         "Please use API v%u instead.\n",
1312                                           buf, api_max);
1313
1314                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1315                                        buf, ucode_raw->size);
1316                         break;
1317                 }
1318         }
1319
1320         if (ret < 0)
1321                 goto error;
1322
1323         /* Make sure that we got at least the v1 header! */
1324         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1325                 IWL_ERR(priv, "File size way too small!\n");
1326                 ret = -EINVAL;
1327                 goto err_release;
1328         }
1329
1330         /* Data from ucode file:  header followed by uCode images */
1331         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1332
1333         priv->ucode_ver = le32_to_cpu(ucode->ver);
1334         api_ver = IWL_UCODE_API(priv->ucode_ver);
1335         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1336         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1337         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1338         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1339         init_data_size =
1340                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1341         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1342         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1343
1344         /* api_ver should match the api version forming part of the
1345          * firmware filename ... but we don't check for that and only rely
1346          * on the API version read from firmware header from here on forward */
1347
1348         if (api_ver < api_min || api_ver > api_max) {
1349                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1350                           "Driver supports v%u, firmware is v%u.\n",
1351                           api_max, api_ver);
1352                 priv->ucode_ver = 0;
1353                 ret = -EINVAL;
1354                 goto err_release;
1355         }
1356         if (api_ver != api_max)
1357                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1358                           "got v%u. New firmware can be obtained "
1359                           "from http://www.intellinuxwireless.org.\n",
1360                           api_max, api_ver);
1361
1362         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1363                IWL_UCODE_MAJOR(priv->ucode_ver),
1364                IWL_UCODE_MINOR(priv->ucode_ver),
1365                IWL_UCODE_API(priv->ucode_ver),
1366                IWL_UCODE_SERIAL(priv->ucode_ver));
1367
1368         if (build)
1369                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1370
1371         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1372                        priv->ucode_ver);
1373         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1374                        inst_size);
1375         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1376                        data_size);
1377         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1378                        init_size);
1379         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1380                        init_data_size);
1381         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1382                        boot_size);
1383
1384         /* Verify size of file vs. image size info in file's header */
1385         if (ucode_raw->size !=
1386                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1387                 inst_size + data_size + init_size +
1388                 init_data_size + boot_size) {
1389
1390                 IWL_DEBUG_INFO(priv,
1391                         "uCode file size %d does not match expected size\n",
1392                         (int)ucode_raw->size);
1393                 ret = -EINVAL;
1394                 goto err_release;
1395         }
1396
1397         /* Verify that uCode images will fit in card's SRAM */
1398         if (inst_size > priv->hw_params.max_inst_size) {
1399                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1400                                inst_size);
1401                 ret = -EINVAL;
1402                 goto err_release;
1403         }
1404
1405         if (data_size > priv->hw_params.max_data_size) {
1406                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1407                                 data_size);
1408                 ret = -EINVAL;
1409                 goto err_release;
1410         }
1411         if (init_size > priv->hw_params.max_inst_size) {
1412                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1413                         init_size);
1414                 ret = -EINVAL;
1415                 goto err_release;
1416         }
1417         if (init_data_size > priv->hw_params.max_data_size) {
1418                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1419                       init_data_size);
1420                 ret = -EINVAL;
1421                 goto err_release;
1422         }
1423         if (boot_size > priv->hw_params.max_bsm_size) {
1424                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1425                         boot_size);
1426                 ret = -EINVAL;
1427                 goto err_release;
1428         }
1429
1430         /* Allocate ucode buffers for card's bus-master loading ... */
1431
1432         /* Runtime instructions and 2 copies of data:
1433          * 1) unmodified from disk
1434          * 2) backup cache for save/restore during power-downs */
1435         priv->ucode_code.len = inst_size;
1436         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1437
1438         priv->ucode_data.len = data_size;
1439         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1440
1441         priv->ucode_data_backup.len = data_size;
1442         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1443
1444         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1445             !priv->ucode_data_backup.v_addr)
1446                 goto err_pci_alloc;
1447
1448         /* Initialization instructions and data */
1449         if (init_size && init_data_size) {
1450                 priv->ucode_init.len = init_size;
1451                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1452
1453                 priv->ucode_init_data.len = init_data_size;
1454                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1455
1456                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1457                         goto err_pci_alloc;
1458         }
1459
1460         /* Bootstrap (instructions only, no data) */
1461         if (boot_size) {
1462                 priv->ucode_boot.len = boot_size;
1463                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1464
1465                 if (!priv->ucode_boot.v_addr)
1466                         goto err_pci_alloc;
1467         }
1468
1469         /* Copy images into buffers for card's bus-master reads ... */
1470
1471         /* Runtime instructions (first block of data in file) */
1472         len = inst_size;
1473         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1474         memcpy(priv->ucode_code.v_addr, src, len);
1475         src += len;
1476
1477         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1478                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1479
1480         /* Runtime data (2nd block)
1481          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1482         len = data_size;
1483         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1484         memcpy(priv->ucode_data.v_addr, src, len);
1485         memcpy(priv->ucode_data_backup.v_addr, src, len);
1486         src += len;
1487
1488         /* Initialization instructions (3rd block) */
1489         if (init_size) {
1490                 len = init_size;
1491                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1492                                 len);
1493                 memcpy(priv->ucode_init.v_addr, src, len);
1494                 src += len;
1495         }
1496
1497         /* Initialization data (4th block) */
1498         if (init_data_size) {
1499                 len = init_data_size;
1500                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1501                                len);
1502                 memcpy(priv->ucode_init_data.v_addr, src, len);
1503                 src += len;
1504         }
1505
1506         /* Bootstrap instructions (5th block) */
1507         len = boot_size;
1508         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1509         memcpy(priv->ucode_boot.v_addr, src, len);
1510
1511         /* We have our copies now, allow OS release its copies */
1512         release_firmware(ucode_raw);
1513         return 0;
1514
1515  err_pci_alloc:
1516         IWL_ERR(priv, "failed to allocate pci memory\n");
1517         ret = -ENOMEM;
1518         iwl_dealloc_ucode_pci(priv);
1519
1520  err_release:
1521         release_firmware(ucode_raw);
1522
1523  error:
1524         return ret;
1525 }
1526
1527 /**
1528  * iwl_alive_start - called after REPLY_ALIVE notification received
1529  *                   from protocol/runtime uCode (initialization uCode's
1530  *                   Alive gets handled by iwl_init_alive_start()).
1531  */
1532 static void iwl_alive_start(struct iwl_priv *priv)
1533 {
1534         int ret = 0;
1535
1536         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1537
1538         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1539                 /* We had an error bringing up the hardware, so take it
1540                  * all the way back down so we can try again */
1541                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1542                 goto restart;
1543         }
1544
1545         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1546          * This is a paranoid check, because we would not have gotten the
1547          * "runtime" alive if code weren't properly loaded.  */
1548         if (iwl_verify_ucode(priv)) {
1549                 /* Runtime instruction load was bad;
1550                  * take it all the way back down so we can try again */
1551                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1552                 goto restart;
1553         }
1554
1555         iwl_clear_stations_table(priv);
1556         ret = priv->cfg->ops->lib->alive_notify(priv);
1557         if (ret) {
1558                 IWL_WARN(priv,
1559                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1560                 goto restart;
1561         }
1562
1563         /* After the ALIVE response, we can send host commands to the uCode */
1564         set_bit(STATUS_ALIVE, &priv->status);
1565
1566         if (iwl_is_rfkill(priv))
1567                 return;
1568
1569         ieee80211_wake_queues(priv->hw);
1570
1571         priv->active_rate = priv->rates_mask;
1572         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1573
1574         if (iwl_is_associated(priv)) {
1575                 struct iwl_rxon_cmd *active_rxon =
1576                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1577                 /* apply any changes in staging */
1578                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1579                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1580         } else {
1581                 /* Initialize our rx_config data */
1582                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1583
1584                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1585                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1586
1587                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1588         }
1589
1590         /* Configure Bluetooth device coexistence support */
1591         iwl_send_bt_config(priv);
1592
1593         iwl_reset_run_time_calib(priv);
1594
1595         /* Configure the adapter for unassociated operation */
1596         iwlcore_commit_rxon(priv);
1597
1598         /* At this point, the NIC is initialized and operational */
1599         iwl_rf_kill_ct_config(priv);
1600
1601         iwl_leds_register(priv);
1602
1603         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1604         set_bit(STATUS_READY, &priv->status);
1605         wake_up_interruptible(&priv->wait_command_queue);
1606
1607         iwl_power_update_mode(priv, 1);
1608
1609         /* reassociate for ADHOC mode */
1610         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1611                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1612                                                                 priv->vif);
1613                 if (beacon)
1614                         iwl_mac_beacon_update(priv->hw, beacon);
1615         }
1616
1617
1618         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1619                 iwl_set_mode(priv, priv->iw_mode);
1620
1621         return;
1622
1623  restart:
1624         queue_work(priv->workqueue, &priv->restart);
1625 }
1626
1627 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1628
1629 static void __iwl_down(struct iwl_priv *priv)
1630 {
1631         unsigned long flags;
1632         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1633
1634         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1635
1636         if (!exit_pending)
1637                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1638
1639         iwl_leds_unregister(priv);
1640
1641         iwl_clear_stations_table(priv);
1642
1643         /* Unblock any waiting calls */
1644         wake_up_interruptible_all(&priv->wait_command_queue);
1645
1646         /* Wipe out the EXIT_PENDING status bit if we are not actually
1647          * exiting the module */
1648         if (!exit_pending)
1649                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1650
1651         /* stop and reset the on-board processor */
1652         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1653
1654         /* tell the device to stop sending interrupts */
1655         spin_lock_irqsave(&priv->lock, flags);
1656         iwl_disable_interrupts(priv);
1657         spin_unlock_irqrestore(&priv->lock, flags);
1658         iwl_synchronize_irq(priv);
1659
1660         if (priv->mac80211_registered)
1661                 ieee80211_stop_queues(priv->hw);
1662
1663         /* If we have not previously called iwl_init() then
1664          * clear all bits but the RF Kill bit and return */
1665         if (!iwl_is_init(priv)) {
1666                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1667                                         STATUS_RF_KILL_HW |
1668                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1669                                         STATUS_GEO_CONFIGURED |
1670                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1671                                         STATUS_EXIT_PENDING;
1672                 goto exit;
1673         }
1674
1675         /* ...otherwise clear out all the status bits but the RF Kill
1676          * bit and continue taking the NIC down. */
1677         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1678                                 STATUS_RF_KILL_HW |
1679                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1680                                 STATUS_GEO_CONFIGURED |
1681                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1682                                 STATUS_FW_ERROR |
1683                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1684                                 STATUS_EXIT_PENDING;
1685
1686         /* device going down, Stop using ICT table */
1687         iwl_disable_ict(priv);
1688         spin_lock_irqsave(&priv->lock, flags);
1689         iwl_clear_bit(priv, CSR_GP_CNTRL,
1690                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1691         spin_unlock_irqrestore(&priv->lock, flags);
1692
1693         iwl_txq_ctx_stop(priv);
1694         iwl_rxq_stop(priv);
1695
1696         iwl_write_prph(priv, APMG_CLK_DIS_REG,
1697                                 APMG_CLK_VAL_DMA_CLK_RQT);
1698
1699         udelay(5);
1700
1701         /* FIXME: apm_ops.suspend(priv) */
1702         if (exit_pending)
1703                 priv->cfg->ops->lib->apm_ops.stop(priv);
1704         else
1705                 priv->cfg->ops->lib->apm_ops.reset(priv);
1706  exit:
1707         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1708
1709         if (priv->ibss_beacon)
1710                 dev_kfree_skb(priv->ibss_beacon);
1711         priv->ibss_beacon = NULL;
1712
1713         /* clear out any free frames */
1714         iwl_clear_free_frames(priv);
1715 }
1716
1717 static void iwl_down(struct iwl_priv *priv)
1718 {
1719         mutex_lock(&priv->mutex);
1720         __iwl_down(priv);
1721         mutex_unlock(&priv->mutex);
1722
1723         iwl_cancel_deferred_work(priv);
1724 }
1725
1726 #define HW_READY_TIMEOUT (50)
1727
1728 static int iwl_set_hw_ready(struct iwl_priv *priv)
1729 {
1730         int ret = 0;
1731
1732         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1733                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
1734
1735         /* See if we got it */
1736         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1737                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1738                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1739                                 HW_READY_TIMEOUT);
1740         if (ret != -ETIMEDOUT)
1741                 priv->hw_ready = true;
1742         else
1743                 priv->hw_ready = false;
1744
1745         IWL_DEBUG_INFO(priv, "hardware %s\n",
1746                       (priv->hw_ready == 1) ? "ready" : "not ready");
1747         return ret;
1748 }
1749
1750 static int iwl_prepare_card_hw(struct iwl_priv *priv)
1751 {
1752         int ret = 0;
1753
1754         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
1755
1756         ret = iwl_set_hw_ready(priv);
1757         if (priv->hw_ready)
1758                 return ret;
1759
1760         /* If HW is not ready, prepare the conditions to check again */
1761         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1762                         CSR_HW_IF_CONFIG_REG_PREPARE);
1763
1764         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1765                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
1766                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
1767
1768         /* HW should be ready by now, check again. */
1769         if (ret != -ETIMEDOUT)
1770                 iwl_set_hw_ready(priv);
1771
1772         return ret;
1773 }
1774
1775 #define MAX_HW_RESTARTS 5
1776
1777 static int __iwl_up(struct iwl_priv *priv)
1778 {
1779         int i;
1780         int ret;
1781         unsigned long status;
1782
1783         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1784                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1785                 return -EIO;
1786         }
1787
1788         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1789                 IWL_ERR(priv, "ucode not available for device bringup\n");
1790                 return -EIO;
1791         }
1792
1793         iwl_prepare_card_hw(priv);
1794
1795         if (!priv->hw_ready) {
1796                 IWL_WARN(priv, "Exit HW not ready\n");
1797                 return -EIO;
1798         }
1799
1800         /* If platform's RF_KILL switch is NOT set to KILL */
1801         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1802                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1803         else
1804                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1805
1806         if (iwl_is_rfkill(priv)) {
1807                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
1808
1809                 iwl_enable_interrupts(priv);
1810                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
1811                 return 0;
1812         }
1813
1814         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1815
1816         ret = iwl_hw_nic_init(priv);
1817         if (ret) {
1818                 IWL_ERR(priv, "Unable to init nic\n");
1819                 return ret;
1820         }
1821
1822         /* make sure rfkill handshake bits are cleared */
1823         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1824         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1825                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1826
1827         /* clear (again), then enable host interrupts */
1828         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1829         iwl_enable_interrupts(priv);
1830
1831         /* really make sure rfkill handshake bits are cleared */
1832         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1833         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1834
1835         /* Copy original ucode data image from disk into backup cache.
1836          * This will be used to initialize the on-board processor's
1837          * data SRAM for a clean start when the runtime program first loads. */
1838         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1839                priv->ucode_data.len);
1840
1841         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1842
1843                 iwl_clear_stations_table(priv);
1844
1845                 /* load bootstrap state machine,
1846                  * load bootstrap program into processor's memory,
1847                  * prepare to load the "initialize" uCode */
1848                 ret = priv->cfg->ops->lib->load_ucode(priv);
1849
1850                 if (ret) {
1851                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1852                                 ret);
1853                         continue;
1854                 }
1855
1856                 /* start card; "initialize" will load runtime ucode */
1857                 iwl_nic_start(priv);
1858
1859                 /* Just finish download Init or Runtime uCode image to device
1860                  * now we wait here for uCode send REPLY_ALIVE notification
1861                  * to indicate uCode is ready.
1862                  * 1) For Init uCode image, all iwlagn devices should wait here
1863                  * on STATUS_INIT_UCODE_ALIVE status bit; if timeout before
1864                  * receive the REPLY_ALIVE notification, go back and try to
1865                  * download the Init uCode image again.
1866                  * 2) For Runtime uCode image, all iwlagn devices except 4965
1867                  * wait here on STATUS_RT_UCODE_ALIVE status bit; if
1868                  * timeout before receive the REPLY_ALIVE notification, go back
1869                  * and download the Runtime uCode image again.
1870                  * 3) For 4965 Runtime uCode, it will not go through this path,
1871                  * need to wait for STATUS_RT_UCODE_ALIVE status bit in
1872                  * iwl4965_init_alive_start() function; if timeout, need to
1873                  * restart and download Init uCode image.
1874                  */
1875                 if (priv->ucode_type == UCODE_INIT)
1876                         status = STATUS_INIT_UCODE_ALIVE;
1877                 else
1878                         status = STATUS_RT_UCODE_ALIVE;
1879                 if (test_bit(status, &priv->status)) {
1880                         IWL_WARN(priv,
1881                                 "%s uCode already alive? "
1882                                 "Waiting for alive anyway\n",
1883                                 (status == STATUS_INIT_UCODE_ALIVE)
1884                                 ? "INIT" : "Runtime");
1885                         clear_bit(status, &priv->status);
1886                 }
1887                 ret = wait_event_interruptible_timeout(
1888                                 priv->wait_command_queue,
1889                                 test_bit(status, &priv->status),
1890                                 UCODE_ALIVE_TIMEOUT);
1891                 if (!ret) {
1892                         if (!test_bit(status, &priv->status)) {
1893                                 priv->ucode_type =
1894                                         (status == STATUS_INIT_UCODE_ALIVE)
1895                                         ? UCODE_NONE : UCODE_INIT;
1896                                 IWL_ERR(priv,
1897                                         "%s timeout after %dms\n",
1898                                         (status == STATUS_INIT_UCODE_ALIVE)
1899                                         ? "INIT" : "Runtime",
1900                                         jiffies_to_msecs(UCODE_ALIVE_TIMEOUT));
1901                                 continue;
1902                         }
1903                 }
1904                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1905
1906                 return 0;
1907         }
1908
1909         set_bit(STATUS_EXIT_PENDING, &priv->status);
1910         __iwl_down(priv);
1911         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1912
1913         /* tried to restart and config the device for as long as our
1914          * patience could withstand */
1915         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1916         return -EIO;
1917 }
1918
1919
1920 /*****************************************************************************
1921  *
1922  * Workqueue callbacks
1923  *
1924  *****************************************************************************/
1925
1926 static void iwl_bg_init_alive_start(struct work_struct *data)
1927 {
1928         struct iwl_priv *priv =
1929             container_of(data, struct iwl_priv, init_alive_start.work);
1930
1931         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1932                 return;
1933
1934         mutex_lock(&priv->mutex);
1935         priv->cfg->ops->lib->init_alive_start(priv);
1936         mutex_unlock(&priv->mutex);
1937 }
1938
1939 static void iwl_bg_alive_start(struct work_struct *data)
1940 {
1941         struct iwl_priv *priv =
1942             container_of(data, struct iwl_priv, alive_start.work);
1943
1944         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1945                 return;
1946
1947         /* enable dram interrupt */
1948         iwl_reset_ict(priv);
1949
1950         mutex_lock(&priv->mutex);
1951         iwl_alive_start(priv);
1952         mutex_unlock(&priv->mutex);
1953 }
1954
1955 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1956 {
1957         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1958                         run_time_calib_work);
1959
1960         mutex_lock(&priv->mutex);
1961
1962         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1963             test_bit(STATUS_SCANNING, &priv->status)) {
1964                 mutex_unlock(&priv->mutex);
1965                 return;
1966         }
1967
1968         if (priv->start_calib) {
1969                 iwl_chain_noise_calibration(priv, &priv->statistics);
1970
1971                 iwl_sensitivity_calibration(priv, &priv->statistics);
1972         }
1973
1974         mutex_unlock(&priv->mutex);
1975         return;
1976 }
1977
1978 static void iwl_bg_up(struct work_struct *data)
1979 {
1980         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1981
1982         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1983                 return;
1984
1985         mutex_lock(&priv->mutex);
1986         __iwl_up(priv);
1987         mutex_unlock(&priv->mutex);
1988 }
1989
1990 static void iwl_bg_restart(struct work_struct *data)
1991 {
1992         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1993
1994         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1995                 return;
1996
1997         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
1998                 mutex_lock(&priv->mutex);
1999                 priv->vif = NULL;
2000                 priv->is_open = 0;
2001                 mutex_unlock(&priv->mutex);
2002                 iwl_down(priv);
2003                 ieee80211_restart_hw(priv->hw);
2004         } else {
2005                 iwl_down(priv);
2006                 queue_work(priv->workqueue, &priv->up);
2007         }
2008 }
2009
2010 static void iwl_bg_rx_replenish(struct work_struct *data)
2011 {
2012         struct iwl_priv *priv =
2013             container_of(data, struct iwl_priv, rx_replenish);
2014
2015         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2016                 return;
2017
2018         mutex_lock(&priv->mutex);
2019         iwl_rx_replenish(priv);
2020         mutex_unlock(&priv->mutex);
2021 }
2022
2023 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2024
2025 void iwl_post_associate(struct iwl_priv *priv)
2026 {
2027         struct ieee80211_conf *conf = NULL;
2028         int ret = 0;
2029         unsigned long flags;
2030
2031         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2032                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2033                 return;
2034         }
2035
2036         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2037                         priv->assoc_id, priv->active_rxon.bssid_addr);
2038
2039
2040         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2041                 return;
2042
2043
2044         if (!priv->vif || !priv->is_open)
2045                 return;
2046
2047         iwl_scan_cancel_timeout(priv, 200);
2048
2049         conf = ieee80211_get_hw_conf(priv->hw);
2050
2051         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2052         iwlcore_commit_rxon(priv);
2053
2054         iwl_setup_rxon_timing(priv);
2055         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2056                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2057         if (ret)
2058                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2059                             "Attempting to continue.\n");
2060
2061         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2062
2063         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2064
2065         if (priv->cfg->ops->hcmd->set_rxon_chain)
2066                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2067
2068         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2069
2070         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2071                         priv->assoc_id, priv->beacon_int);
2072
2073         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2074                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2075         else
2076                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2077
2078         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2079                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2080                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2081                 else
2082                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2083
2084                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2085                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2086
2087         }
2088
2089         iwlcore_commit_rxon(priv);
2090
2091         switch (priv->iw_mode) {
2092         case NL80211_IFTYPE_STATION:
2093                 break;
2094
2095         case NL80211_IFTYPE_ADHOC:
2096
2097                 /* assume default assoc id */
2098                 priv->assoc_id = 1;
2099
2100                 iwl_rxon_add_station(priv, priv->bssid, 0);
2101                 iwl_send_beacon_cmd(priv);
2102
2103                 break;
2104
2105         default:
2106                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2107                           __func__, priv->iw_mode);
2108                 break;
2109         }
2110
2111         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2112                 priv->assoc_station_added = 1;
2113
2114         spin_lock_irqsave(&priv->lock, flags);
2115         iwl_activate_qos(priv, 0);
2116         spin_unlock_irqrestore(&priv->lock, flags);
2117
2118         /* the chain noise calibration will enabled PM upon completion
2119          * If chain noise has already been run, then we need to enable
2120          * power management here */
2121         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2122                 iwl_power_update_mode(priv, 0);
2123
2124         /* Enable Rx differential gain and sensitivity calibrations */
2125         iwl_chain_noise_reset(priv);
2126         priv->start_calib = 1;
2127
2128 }
2129
2130 /*****************************************************************************
2131  *
2132  * mac80211 entry point functions
2133  *
2134  *****************************************************************************/
2135
2136 #define UCODE_READY_TIMEOUT     (4 * HZ)
2137
2138 static int iwl_mac_start(struct ieee80211_hw *hw)
2139 {
2140         struct iwl_priv *priv = hw->priv;
2141         int ret;
2142
2143         IWL_DEBUG_MAC80211(priv, "enter\n");
2144
2145         /* we should be verifying the device is ready to be opened */
2146         mutex_lock(&priv->mutex);
2147
2148         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2149          * ucode filename and max sizes are card-specific. */
2150
2151         if (!priv->ucode_code.len) {
2152                 ret = iwl_read_ucode(priv);
2153                 if (ret) {
2154                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2155                         mutex_unlock(&priv->mutex);
2156                         return ret;
2157                 }
2158         }
2159
2160         ret = __iwl_up(priv);
2161
2162         mutex_unlock(&priv->mutex);
2163
2164         if (ret)
2165                 return ret;
2166
2167         if (iwl_is_rfkill(priv))
2168                 goto out;
2169
2170         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2171
2172         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2173          * mac80211 will not be run successfully. */
2174         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2175                         test_bit(STATUS_READY, &priv->status),
2176                         UCODE_READY_TIMEOUT);
2177         if (!ret) {
2178                 if (!test_bit(STATUS_READY, &priv->status)) {
2179                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2180                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2181                         return -ETIMEDOUT;
2182                 }
2183         }
2184
2185 out:
2186         priv->is_open = 1;
2187         IWL_DEBUG_MAC80211(priv, "leave\n");
2188         return 0;
2189 }
2190
2191 static void iwl_mac_stop(struct ieee80211_hw *hw)
2192 {
2193         struct iwl_priv *priv = hw->priv;
2194
2195         IWL_DEBUG_MAC80211(priv, "enter\n");
2196
2197         if (!priv->is_open)
2198                 return;
2199
2200         priv->is_open = 0;
2201
2202         if (iwl_is_ready_rf(priv)) {
2203                 /* stop mac, cancel any scan request and clear
2204                  * RXON_FILTER_ASSOC_MSK BIT
2205                  */
2206                 mutex_lock(&priv->mutex);
2207                 iwl_scan_cancel_timeout(priv, 100);
2208                 mutex_unlock(&priv->mutex);
2209         }
2210
2211         iwl_down(priv);
2212
2213         flush_workqueue(priv->workqueue);
2214
2215         /* enable interrupts again in order to receive rfkill changes */
2216         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2217         iwl_enable_interrupts(priv);
2218
2219         IWL_DEBUG_MAC80211(priv, "leave\n");
2220 }
2221
2222 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2223 {
2224         struct iwl_priv *priv = hw->priv;
2225
2226         IWL_DEBUG_MACDUMP(priv, "enter\n");
2227
2228         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2229                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2230
2231         if (iwl_tx_skb(priv, skb))
2232                 dev_kfree_skb_any(skb);
2233
2234         IWL_DEBUG_MACDUMP(priv, "leave\n");
2235         return NETDEV_TX_OK;
2236 }
2237
2238 void iwl_config_ap(struct iwl_priv *priv)
2239 {
2240         int ret = 0;
2241         unsigned long flags;
2242
2243         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2244                 return;
2245
2246         /* The following should be done only at AP bring up */
2247         if (!iwl_is_associated(priv)) {
2248
2249                 /* RXON - unassoc (to set timing command) */
2250                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2251                 iwlcore_commit_rxon(priv);
2252
2253                 /* RXON Timing */
2254                 iwl_setup_rxon_timing(priv);
2255                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2256                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2257                 if (ret)
2258                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2259                                         "Attempting to continue.\n");
2260
2261                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2262                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2263
2264                 /* FIXME: what should be the assoc_id for AP? */
2265                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2266                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2267                         priv->staging_rxon.flags |=
2268                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2269                 else
2270                         priv->staging_rxon.flags &=
2271                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2272
2273                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2274                         if (priv->assoc_capability &
2275                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2276                                 priv->staging_rxon.flags |=
2277                                         RXON_FLG_SHORT_SLOT_MSK;
2278                         else
2279                                 priv->staging_rxon.flags &=
2280                                         ~RXON_FLG_SHORT_SLOT_MSK;
2281
2282                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2283                                 priv->staging_rxon.flags &=
2284                                         ~RXON_FLG_SHORT_SLOT_MSK;
2285                 }
2286                 /* restore RXON assoc */
2287                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2288                 iwlcore_commit_rxon(priv);
2289                 spin_lock_irqsave(&priv->lock, flags);
2290                 iwl_activate_qos(priv, 1);
2291                 spin_unlock_irqrestore(&priv->lock, flags);
2292                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2293         }
2294         iwl_send_beacon_cmd(priv);
2295
2296         /* FIXME - we need to add code here to detect a totally new
2297          * configuration, reset the AP, unassoc, rxon timing, assoc,
2298          * clear sta table, add BCAST sta... */
2299 }
2300
2301 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2302                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2303                         u32 iv32, u16 *phase1key)
2304 {
2305
2306         struct iwl_priv *priv = hw->priv;
2307         IWL_DEBUG_MAC80211(priv, "enter\n");
2308
2309         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2310
2311         IWL_DEBUG_MAC80211(priv, "leave\n");
2312 }
2313
2314 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2315                            struct ieee80211_vif *vif,
2316                            struct ieee80211_sta *sta,
2317                            struct ieee80211_key_conf *key)
2318 {
2319         struct iwl_priv *priv = hw->priv;
2320         const u8 *addr;
2321         int ret;
2322         u8 sta_id;
2323         bool is_default_wep_key = false;
2324
2325         IWL_DEBUG_MAC80211(priv, "enter\n");
2326
2327         if (priv->cfg->mod_params->sw_crypto) {
2328                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2329                 return -EOPNOTSUPP;
2330         }
2331         addr = sta ? sta->addr : iwl_bcast_addr;
2332         sta_id = iwl_find_station(priv, addr);
2333         if (sta_id == IWL_INVALID_STATION) {
2334                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2335                                    addr);
2336                 return -EINVAL;
2337
2338         }
2339
2340         mutex_lock(&priv->mutex);
2341         iwl_scan_cancel_timeout(priv, 100);
2342         mutex_unlock(&priv->mutex);
2343
2344         /* If we are getting WEP group key and we didn't receive any key mapping
2345          * so far, we are in legacy wep mode (group key only), otherwise we are
2346          * in 1X mode.
2347          * In legacy wep mode, we use another host command to the uCode */
2348         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2349                 priv->iw_mode != NL80211_IFTYPE_AP) {
2350                 if (cmd == SET_KEY)
2351                         is_default_wep_key = !priv->key_mapping_key;
2352                 else
2353                         is_default_wep_key =
2354                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2355         }
2356
2357         switch (cmd) {
2358         case SET_KEY:
2359                 if (is_default_wep_key)
2360                         ret = iwl_set_default_wep_key(priv, key);
2361                 else
2362                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2363
2364                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2365                 break;
2366         case DISABLE_KEY:
2367                 if (is_default_wep_key)
2368                         ret = iwl_remove_default_wep_key(priv, key);
2369                 else
2370                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2371
2372                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2373                 break;
2374         default:
2375                 ret = -EINVAL;
2376         }
2377
2378         IWL_DEBUG_MAC80211(priv, "leave\n");
2379
2380         return ret;
2381 }
2382
2383 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2384                              enum ieee80211_ampdu_mlme_action action,
2385                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2386 {
2387         struct iwl_priv *priv = hw->priv;
2388         int ret;
2389
2390         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2391                      sta->addr, tid);
2392
2393         if (!(priv->cfg->sku & IWL_SKU_N))
2394                 return -EACCES;
2395
2396         switch (action) {
2397         case IEEE80211_AMPDU_RX_START:
2398                 IWL_DEBUG_HT(priv, "start Rx\n");
2399                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2400         case IEEE80211_AMPDU_RX_STOP:
2401                 IWL_DEBUG_HT(priv, "stop Rx\n");
2402                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2403                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2404                         return 0;
2405                 else
2406                         return ret;
2407         case IEEE80211_AMPDU_TX_START:
2408                 IWL_DEBUG_HT(priv, "start Tx\n");
2409                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2410         case IEEE80211_AMPDU_TX_STOP:
2411                 IWL_DEBUG_HT(priv, "stop Tx\n");
2412                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2413                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2414                         return 0;
2415                 else
2416                         return ret;
2417         default:
2418                 IWL_DEBUG_HT(priv, "unknown\n");
2419                 return -EINVAL;
2420                 break;
2421         }
2422         return 0;
2423 }
2424
2425 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2426                              struct ieee80211_low_level_stats *stats)
2427 {
2428         struct iwl_priv *priv = hw->priv;
2429
2430         priv = hw->priv;
2431         IWL_DEBUG_MAC80211(priv, "enter\n");
2432         IWL_DEBUG_MAC80211(priv, "leave\n");
2433
2434         return 0;
2435 }
2436
2437 /*****************************************************************************
2438  *
2439  * sysfs attributes
2440  *
2441  *****************************************************************************/
2442
2443 #ifdef CONFIG_IWLWIFI_DEBUG
2444
2445 /*
2446  * The following adds a new attribute to the sysfs representation
2447  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2448  * used for controlling the debug level.
2449  *
2450  * See the level definitions in iwl for details.
2451  *
2452  * FIXME This file can be deprecated as the module parameter is
2453  * writable and users can thus also change the debug level
2454  * using the /sys/module/iwl3945/parameters/debug file.
2455  */
2456
2457 static ssize_t show_debug_level(struct device *d,
2458                                 struct device_attribute *attr, char *buf)
2459 {
2460         return sprintf(buf, "0x%08X\n", iwl_debug_level);
2461 }
2462 static ssize_t store_debug_level(struct device *d,
2463                                 struct device_attribute *attr,
2464                                  const char *buf, size_t count)
2465 {
2466         struct iwl_priv *priv = dev_get_drvdata(d);
2467         unsigned long val;
2468         int ret;
2469
2470         ret = strict_strtoul(buf, 0, &val);
2471         if (ret)
2472                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2473         else
2474                 iwl_debug_level = val;
2475
2476         return strnlen(buf, count);
2477 }
2478
2479 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2480                         show_debug_level, store_debug_level);
2481
2482
2483 #endif /* CONFIG_IWLWIFI_DEBUG */
2484
2485
2486 static ssize_t show_version(struct device *d,
2487                                 struct device_attribute *attr, char *buf)
2488 {
2489         struct iwl_priv *priv = dev_get_drvdata(d);
2490         struct iwl_alive_resp *palive = &priv->card_alive;
2491         ssize_t pos = 0;
2492         u16 eeprom_ver;
2493
2494         if (palive->is_valid)
2495                 pos += sprintf(buf + pos,
2496                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2497                                 "fw type: 0x%01X 0x%01X\n",
2498                                 palive->ucode_major, palive->ucode_minor,
2499                                 palive->sw_rev[0], palive->sw_rev[1],
2500                                 palive->ver_type, palive->ver_subtype);
2501         else
2502                 pos += sprintf(buf + pos, "fw not loaded\n");
2503
2504         if (priv->eeprom) {
2505                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2506                 pos += sprintf(buf + pos, "NVM Type: %s, version: 0x%x\n",
2507                                (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
2508                                ? "OTP" : "EEPROM", eeprom_ver);
2509
2510         } else {
2511                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2512         }
2513
2514         return pos;
2515 }
2516
2517 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2518
2519 static ssize_t show_temperature(struct device *d,
2520                                 struct device_attribute *attr, char *buf)
2521 {
2522         struct iwl_priv *priv = dev_get_drvdata(d);
2523
2524         if (!iwl_is_alive(priv))
2525                 return -EAGAIN;
2526
2527         return sprintf(buf, "%d\n", priv->temperature);
2528 }
2529
2530 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2531
2532 static ssize_t show_tx_power(struct device *d,
2533                              struct device_attribute *attr, char *buf)
2534 {
2535         struct iwl_priv *priv = dev_get_drvdata(d);
2536
2537         if (!iwl_is_ready_rf(priv))
2538                 return sprintf(buf, "off\n");
2539         else
2540                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2541 }
2542
2543 static ssize_t store_tx_power(struct device *d,
2544                               struct device_attribute *attr,
2545                               const char *buf, size_t count)
2546 {
2547         struct iwl_priv *priv = dev_get_drvdata(d);
2548         unsigned long val;
2549         int ret;
2550
2551         ret = strict_strtoul(buf, 10, &val);
2552         if (ret)
2553                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2554         else
2555                 iwl_set_tx_power(priv, val, false);
2556
2557         return count;
2558 }
2559
2560 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2561
2562 static ssize_t show_flags(struct device *d,
2563                           struct device_attribute *attr, char *buf)
2564 {
2565         struct iwl_priv *priv = dev_get_drvdata(d);
2566
2567         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2568 }
2569
2570 static ssize_t store_flags(struct device *d,
2571                            struct device_attribute *attr,
2572                            const char *buf, size_t count)
2573 {
2574         struct iwl_priv *priv = dev_get_drvdata(d);
2575         unsigned long val;
2576         u32 flags;
2577         int ret = strict_strtoul(buf, 0, &val);
2578         if (ret)
2579                 return ret;
2580         flags = (u32)val;
2581
2582         mutex_lock(&priv->mutex);
2583         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2584                 /* Cancel any currently running scans... */
2585                 if (iwl_scan_cancel_timeout(priv, 100))
2586                         IWL_WARN(priv, "Could not cancel scan.\n");
2587                 else {
2588                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2589                         priv->staging_rxon.flags = cpu_to_le32(flags);
2590                         iwlcore_commit_rxon(priv);
2591                 }
2592         }
2593         mutex_unlock(&priv->mutex);
2594
2595         return count;
2596 }
2597
2598 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2599
2600 static ssize_t show_filter_flags(struct device *d,
2601                                  struct device_attribute *attr, char *buf)
2602 {
2603         struct iwl_priv *priv = dev_get_drvdata(d);
2604
2605         return sprintf(buf, "0x%04X\n",
2606                 le32_to_cpu(priv->active_rxon.filter_flags));
2607 }
2608
2609 static ssize_t store_filter_flags(struct device *d,
2610                                   struct device_attribute *attr,
2611                                   const char *buf, size_t count)
2612 {
2613         struct iwl_priv *priv = dev_get_drvdata(d);
2614         unsigned long val;
2615         u32 filter_flags;
2616         int ret = strict_strtoul(buf, 0, &val);
2617         if (ret)
2618                 return ret;
2619         filter_flags = (u32)val;
2620
2621         mutex_lock(&priv->mutex);
2622         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2623                 /* Cancel any currently running scans... */
2624                 if (iwl_scan_cancel_timeout(priv, 100))
2625                         IWL_WARN(priv, "Could not cancel scan.\n");
2626                 else {
2627                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2628                                        "0x%04X\n", filter_flags);
2629                         priv->staging_rxon.filter_flags =
2630                                 cpu_to_le32(filter_flags);
2631                         iwlcore_commit_rxon(priv);
2632                 }
2633         }
2634         mutex_unlock(&priv->mutex);
2635
2636         return count;
2637 }
2638
2639 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2640                    store_filter_flags);
2641
2642 static ssize_t store_power_level(struct device *d,
2643                                  struct device_attribute *attr,
2644                                  const char *buf, size_t count)
2645 {
2646         struct iwl_priv *priv = dev_get_drvdata(d);
2647         int ret;
2648         unsigned long mode;
2649
2650
2651         mutex_lock(&priv->mutex);
2652
2653         ret = strict_strtoul(buf, 10, &mode);
2654         if (ret)
2655                 goto out;
2656
2657         ret = iwl_power_set_user_mode(priv, mode);
2658         if (ret) {
2659                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
2660                 goto out;
2661         }
2662         ret = count;
2663
2664  out:
2665         mutex_unlock(&priv->mutex);
2666         return ret;
2667 }
2668
2669 static ssize_t show_power_level(struct device *d,
2670                                 struct device_attribute *attr, char *buf)
2671 {
2672         struct iwl_priv *priv = dev_get_drvdata(d);
2673         int level = priv->power_data.power_mode;
2674         char *p = buf;
2675
2676         p += sprintf(p, "%d\n", level);
2677         return p - buf + 1;
2678 }
2679
2680 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
2681                    store_power_level);
2682
2683
2684 static ssize_t show_statistics(struct device *d,
2685                                struct device_attribute *attr, char *buf)
2686 {
2687         struct iwl_priv *priv = dev_get_drvdata(d);
2688         u32 size = sizeof(struct iwl_notif_statistics);
2689         u32 len = 0, ofs = 0;
2690         u8 *data = (u8 *)&priv->statistics;
2691         int rc = 0;
2692
2693         if (!iwl_is_alive(priv))
2694                 return -EAGAIN;
2695
2696         mutex_lock(&priv->mutex);
2697         rc = iwl_send_statistics_request(priv, 0);
2698         mutex_unlock(&priv->mutex);
2699
2700         if (rc) {
2701                 len = sprintf(buf,
2702                               "Error sending statistics request: 0x%08X\n", rc);
2703                 return len;
2704         }
2705
2706         while (size && (PAGE_SIZE - len)) {
2707                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2708                                    PAGE_SIZE - len, 1);
2709                 len = strlen(buf);
2710                 if (PAGE_SIZE - len)
2711                         buf[len++] = '\n';
2712
2713                 ofs += 16;
2714                 size -= min(size, 16U);
2715         }
2716
2717         return len;
2718 }
2719
2720 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
2721
2722
2723 /*****************************************************************************
2724  *
2725  * driver setup and teardown
2726  *
2727  *****************************************************************************/
2728
2729 static void iwl_setup_deferred_work(struct iwl_priv *priv)
2730 {
2731         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
2732
2733         init_waitqueue_head(&priv->wait_command_queue);
2734
2735         INIT_WORK(&priv->up, iwl_bg_up);
2736         INIT_WORK(&priv->restart, iwl_bg_restart);
2737         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
2738         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
2739         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
2740         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
2741         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
2742
2743         iwl_setup_scan_deferred_work(priv);
2744
2745         if (priv->cfg->ops->lib->setup_deferred_work)
2746                 priv->cfg->ops->lib->setup_deferred_work(priv);
2747
2748         init_timer(&priv->statistics_periodic);
2749         priv->statistics_periodic.data = (unsigned long)priv;
2750         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
2751
2752         if (!priv->cfg->use_isr_legacy)
2753                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2754                         iwl_irq_tasklet, (unsigned long)priv);
2755         else
2756                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2757                         iwl_irq_tasklet_legacy, (unsigned long)priv);
2758 }
2759
2760 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
2761 {
2762         if (priv->cfg->ops->lib->cancel_deferred_work)
2763                 priv->cfg->ops->lib->cancel_deferred_work(priv);
2764
2765         cancel_delayed_work_sync(&priv->init_alive_start);
2766         cancel_delayed_work(&priv->scan_check);
2767         cancel_delayed_work(&priv->alive_start);
2768         cancel_work_sync(&priv->beacon_update);
2769         del_timer_sync(&priv->statistics_periodic);
2770 }
2771
2772 static struct attribute *iwl_sysfs_entries[] = {
2773         &dev_attr_flags.attr,
2774         &dev_attr_filter_flags.attr,
2775         &dev_attr_power_level.attr,
2776         &dev_attr_statistics.attr,
2777         &dev_attr_temperature.attr,
2778         &dev_attr_tx_power.attr,
2779 #ifdef CONFIG_IWLWIFI_DEBUG
2780         &dev_attr_debug_level.attr,
2781 #endif
2782         &dev_attr_version.attr,
2783         NULL
2784 };
2785
2786 static struct attribute_group iwl_attribute_group = {
2787         .name = NULL,           /* put in device directory */
2788         .attrs = iwl_sysfs_entries,
2789 };
2790
2791 static struct ieee80211_ops iwl_hw_ops = {
2792         .tx = iwl_mac_tx,
2793         .start = iwl_mac_start,
2794         .stop = iwl_mac_stop,
2795         .add_interface = iwl_mac_add_interface,
2796         .remove_interface = iwl_mac_remove_interface,
2797         .config = iwl_mac_config,
2798         .configure_filter = iwl_configure_filter,
2799         .set_key = iwl_mac_set_key,
2800         .update_tkip_key = iwl_mac_update_tkip_key,
2801         .get_stats = iwl_mac_get_stats,
2802         .get_tx_stats = iwl_mac_get_tx_stats,
2803         .conf_tx = iwl_mac_conf_tx,
2804         .reset_tsf = iwl_mac_reset_tsf,
2805         .bss_info_changed = iwl_bss_info_changed,
2806         .ampdu_action = iwl_mac_ampdu_action,
2807         .hw_scan = iwl_mac_hw_scan
2808 };
2809
2810 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2811 {
2812         int err = 0;
2813         struct iwl_priv *priv;
2814         struct ieee80211_hw *hw;
2815         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
2816         unsigned long flags;
2817         u16 pci_cmd;
2818
2819         /************************
2820          * 1. Allocating HW data
2821          ************************/
2822
2823         /* Disabling hardware scan means that mac80211 will perform scans
2824          * "the hard way", rather than using device's scan. */
2825         if (cfg->mod_params->disable_hw_scan) {
2826                 if (iwl_debug_level & IWL_DL_INFO)
2827                         dev_printk(KERN_DEBUG, &(pdev->dev),
2828                                    "Disabling hw_scan\n");
2829                 iwl_hw_ops.hw_scan = NULL;
2830         }
2831
2832         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
2833         if (!hw) {
2834                 err = -ENOMEM;
2835                 goto out;
2836         }
2837         priv = hw->priv;
2838         /* At this point both hw and priv are allocated. */
2839
2840         SET_IEEE80211_DEV(hw, &pdev->dev);
2841
2842         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
2843         priv->cfg = cfg;
2844         priv->pci_dev = pdev;
2845         priv->inta_mask = CSR_INI_SET_MASK;
2846
2847 #ifdef CONFIG_IWLWIFI_DEBUG
2848         atomic_set(&priv->restrict_refcnt, 0);
2849 #endif
2850
2851         /**************************
2852          * 2. Initializing PCI bus
2853          **************************/
2854         if (pci_enable_device(pdev)) {
2855                 err = -ENODEV;
2856                 goto out_ieee80211_free_hw;
2857         }
2858
2859         pci_set_master(pdev);
2860
2861         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2862         if (!err)
2863                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2864         if (err) {
2865                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2866                 if (!err)
2867                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2868                 /* both attempts failed: */
2869                 if (err) {
2870                         IWL_WARN(priv, "No suitable DMA available.\n");
2871                         goto out_pci_disable_device;
2872                 }
2873         }
2874
2875         err = pci_request_regions(pdev, DRV_NAME);
2876         if (err)
2877                 goto out_pci_disable_device;
2878
2879         pci_set_drvdata(pdev, priv);
2880
2881
2882         /***********************
2883          * 3. Read REV register
2884          ***********************/
2885         priv->hw_base = pci_iomap(pdev, 0, 0);
2886         if (!priv->hw_base) {
2887                 err = -ENODEV;
2888                 goto out_pci_release_regions;
2889         }
2890
2891         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
2892                 (unsigned long long) pci_resource_len(pdev, 0));
2893         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
2894
2895         /* this spin lock will be used in apm_ops.init and EEPROM access
2896          * we should init now
2897          */
2898         spin_lock_init(&priv->reg_lock);
2899         iwl_hw_detect(priv);
2900         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
2901                 priv->cfg->name, priv->hw_rev);
2902
2903         /* We disable the RETRY_TIMEOUT register (0x41) to keep
2904          * PCI Tx retries from interfering with C3 CPU state */
2905         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2906
2907         iwl_prepare_card_hw(priv);
2908         if (!priv->hw_ready) {
2909                 IWL_WARN(priv, "Failed, HW not ready\n");
2910                 goto out_iounmap;
2911         }
2912
2913         /* amp init */
2914         err = priv->cfg->ops->lib->apm_ops.init(priv);
2915         if (err < 0) {
2916                 IWL_ERR(priv, "Failed to init APMG\n");
2917                 goto out_iounmap;
2918         }
2919         /*****************
2920          * 4. Read EEPROM
2921          *****************/
2922         /* Read the EEPROM */
2923         err = iwl_eeprom_init(priv);
2924         if (err) {
2925                 IWL_ERR(priv, "Unable to init EEPROM\n");
2926                 goto out_iounmap;
2927         }
2928         err = iwl_eeprom_check_version(priv);
2929         if (err)
2930                 goto out_free_eeprom;
2931
2932         /* extract MAC Address */
2933         iwl_eeprom_get_mac(priv, priv->mac_addr);
2934         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
2935         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
2936
2937         /************************
2938          * 5. Setup HW constants
2939          ************************/
2940         if (iwl_set_hw_params(priv)) {
2941                 IWL_ERR(priv, "failed to set hw parameters\n");
2942                 goto out_free_eeprom;
2943         }
2944
2945         /*******************
2946          * 6. Setup priv
2947          *******************/
2948
2949         err = iwl_init_drv(priv);
2950         if (err)
2951                 goto out_free_eeprom;
2952         /* At this point both hw and priv are initialized. */
2953
2954         /********************
2955          * 7. Setup services
2956          ********************/
2957         spin_lock_irqsave(&priv->lock, flags);
2958         iwl_disable_interrupts(priv);
2959         spin_unlock_irqrestore(&priv->lock, flags);
2960
2961         pci_enable_msi(priv->pci_dev);
2962
2963         iwl_alloc_isr_ict(priv);
2964         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
2965                           IRQF_SHARED, DRV_NAME, priv);
2966         if (err) {
2967                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
2968                 goto out_disable_msi;
2969         }
2970         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
2971         if (err) {
2972                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
2973                 goto out_free_irq;
2974         }
2975
2976         iwl_setup_deferred_work(priv);
2977         iwl_setup_rx_handlers(priv);
2978
2979         /**********************************
2980          * 8. Setup and register mac80211
2981          **********************************/
2982
2983         /* enable interrupts if needed: hw bug w/a */
2984         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
2985         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2986                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2987                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
2988         }
2989
2990         iwl_enable_interrupts(priv);
2991
2992         err = iwl_setup_mac(priv);
2993         if (err)
2994                 goto out_remove_sysfs;
2995
2996         err = iwl_dbgfs_register(priv, DRV_NAME);
2997         if (err)
2998                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
2999
3000         /* If platform's RF_KILL switch is NOT set to KILL */
3001         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3002                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3003         else
3004                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3005
3006         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3007                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3008
3009         iwl_power_initialize(priv);
3010         iwl_tt_initialize(priv);
3011         return 0;
3012
3013  out_remove_sysfs:
3014         destroy_workqueue(priv->workqueue);
3015         priv->workqueue = NULL;
3016         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3017  out_free_irq:
3018         free_irq(priv->pci_dev->irq, priv);
3019         iwl_free_isr_ict(priv);
3020  out_disable_msi:
3021         pci_disable_msi(priv->pci_dev);
3022         iwl_uninit_drv(priv);
3023  out_free_eeprom:
3024         iwl_eeprom_free(priv);
3025  out_iounmap:
3026         pci_iounmap(pdev, priv->hw_base);
3027  out_pci_release_regions:
3028         pci_set_drvdata(pdev, NULL);
3029         pci_release_regions(pdev);
3030  out_pci_disable_device:
3031         pci_disable_device(pdev);
3032  out_ieee80211_free_hw:
3033         ieee80211_free_hw(priv->hw);
3034  out:
3035         return err;
3036 }
3037
3038 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3039 {
3040         struct iwl_priv *priv = pci_get_drvdata(pdev);
3041         unsigned long flags;
3042
3043         if (!priv)
3044                 return;
3045
3046         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3047
3048         iwl_dbgfs_unregister(priv);
3049         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3050
3051         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3052          * to be called and iwl_down since we are removing the device
3053          * we need to set STATUS_EXIT_PENDING bit.
3054          */
3055         set_bit(STATUS_EXIT_PENDING, &priv->status);
3056         if (priv->mac80211_registered) {
3057                 ieee80211_unregister_hw(priv->hw);
3058                 priv->mac80211_registered = 0;
3059         } else {
3060                 iwl_down(priv);
3061         }
3062
3063         iwl_tt_exit(priv);
3064
3065         /* make sure we flush any pending irq or
3066          * tasklet for the driver
3067          */
3068         spin_lock_irqsave(&priv->lock, flags);
3069         iwl_disable_interrupts(priv);
3070         spin_unlock_irqrestore(&priv->lock, flags);
3071
3072         iwl_synchronize_irq(priv);
3073
3074         iwl_dealloc_ucode_pci(priv);
3075
3076         if (priv->rxq.bd)
3077                 iwl_rx_queue_free(priv, &priv->rxq);
3078         iwl_hw_txq_ctx_free(priv);
3079
3080         iwl_clear_stations_table(priv);
3081         iwl_eeprom_free(priv);
3082
3083
3084         /*netif_stop_queue(dev); */
3085         flush_workqueue(priv->workqueue);
3086
3087         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3088          * priv->workqueue... so we can't take down the workqueue
3089          * until now... */
3090         destroy_workqueue(priv->workqueue);
3091         priv->workqueue = NULL;
3092
3093         free_irq(priv->pci_dev->irq, priv);
3094         pci_disable_msi(priv->pci_dev);
3095         pci_iounmap(pdev, priv->hw_base);
3096         pci_release_regions(pdev);
3097         pci_disable_device(pdev);
3098         pci_set_drvdata(pdev, NULL);
3099
3100         iwl_uninit_drv(priv);
3101
3102         iwl_free_isr_ict(priv);
3103
3104         if (priv->ibss_beacon)
3105                 dev_kfree_skb(priv->ibss_beacon);
3106
3107         ieee80211_free_hw(priv->hw);
3108 }
3109
3110
3111 /*****************************************************************************
3112  *
3113  * driver and module entry point
3114  *
3115  *****************************************************************************/
3116
3117 /* Hardware specific file defines the PCI IDs table for that hardware module */
3118 static struct pci_device_id iwl_hw_card_ids[] = {
3119 #ifdef CONFIG_IWL4965
3120         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3121         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3122 #endif /* CONFIG_IWL4965 */
3123 #ifdef CONFIG_IWL5000
3124         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3125         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3126         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3127         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3128         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3129         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3130         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3131         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3132         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3133         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3134 /* 5350 WiFi/WiMax */
3135         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3136         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3137         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3138 /* 5150 Wifi/WiMax */
3139         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3140         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3141 /* 6000/6050 Series */
3142         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3143         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3144         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3145         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3146         {IWL_PCI_DEVICE(0x422C, PCI_ANY_ID, iwl6000_2agn_cfg)},
3147         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3148         {IWL_PCI_DEVICE(0x4239, PCI_ANY_ID, iwl6000_2agn_cfg)},
3149         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3150         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3151         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3152         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3153         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3154         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3155 /* 1000 Series WiFi */
3156         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
3157         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
3158 #endif /* CONFIG_IWL5000 */
3159
3160         {0}
3161 };
3162 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3163
3164 static struct pci_driver iwl_driver = {
3165         .name = DRV_NAME,
3166         .id_table = iwl_hw_card_ids,
3167         .probe = iwl_pci_probe,
3168         .remove = __devexit_p(iwl_pci_remove),
3169 #ifdef CONFIG_PM
3170         .suspend = iwl_pci_suspend,
3171         .resume = iwl_pci_resume,
3172 #endif
3173 };
3174
3175 static int __init iwl_init(void)
3176 {
3177
3178         int ret;
3179         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3180         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3181
3182         ret = iwlagn_rate_control_register();
3183         if (ret) {
3184                 printk(KERN_ERR DRV_NAME
3185                        "Unable to register rate control algorithm: %d\n", ret);
3186                 return ret;
3187         }
3188
3189         ret = pci_register_driver(&iwl_driver);
3190         if (ret) {
3191                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3192                 goto error_register;
3193         }
3194
3195         return ret;
3196
3197 error_register:
3198         iwlagn_rate_control_unregister();
3199         return ret;
3200 }
3201
3202 static void __exit iwl_exit(void)
3203 {
3204         pci_unregister_driver(&iwl_driver);
3205         iwlagn_rate_control_unregister();
3206 }
3207
3208 module_exit(iwl_exit);
3209 module_init(iwl_init);
3210
3211 #ifdef CONFIG_IWLWIFI_DEBUG
3212 module_param_named(debug50, iwl_debug_level, uint, 0444);
3213 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3214 module_param_named(debug, iwl_debug_level, uint, 0644);
3215 MODULE_PARM_DESC(debug, "debug output mask");
3216 #endif
3217