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/sched.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #define DRV_NAME        "iwlagn"
  49
  50 #include "iwl-eeprom.h"
  51 #include "iwl-dev.h"
  52 #include "iwl-core.h"
  53 #include "iwl-io.h"
  54 #include "iwl-helpers.h"
  55 #include "iwl-sta.h"
  56 #include "iwl-calib.h"
  57
  58
  59 /******************************************************************************
  60  *
  61  * module boiler plate
  62  *
  63  ******************************************************************************/
  64
  65 /*
  66  * module name, copyright, version, etc.
  67  */
  68 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  69
  70 #ifdef CONFIG_IWLWIFI_DEBUG
  71 #define VD "d"
  72 #else
  73 #define VD
  74 #endif
  75
  76 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  77 #define VS "s"
  78 #else
  79 #define VS
  80 #endif
  81
  82 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89 MODULE_ALIAS("iwl4965");
  90
  91 /*************** STATION TABLE MANAGEMENT ****
  92  * mac80211 should be examined to determine if sta_info is duplicating
  93  * the functionality provided here
  94  */
  95
  96 /**************************************************************/
  97
  98 /**
  99  * iwl_commit_rxon - commit staging_rxon to hardware
 100  *
 101  * The RXON command in staging_rxon is committed to the hardware and
 102  * the active_rxon structure is updated with the new data.  This
 103  * function correctly transitions out of the RXON_ASSOC_MSK state if
 104  * a HW tune is required based on the RXON structure changes.
 105  */
 106 int iwl_commit_rxon(struct iwl_priv *priv)
 107 {
 108         /* cast away the const for active_rxon in this function */
 109         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 110         int ret;
 111         bool new_assoc =
 112                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 113
 114         if (!iwl_is_alive(priv))
 115                 return -EBUSY;
 116
 117         /* always get timestamp with Rx frame */
 118         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 119
 120         ret = iwl_check_rxon_cmd(priv);
 121         if (ret) {
 122                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 123                 return -EINVAL;
 124         }
 125
 126         /*
 127          * receive commit_rxon request
 128          * abort any previous channel switch if still in process
 129          */
 130         if (priv->switch_rxon.switch_in_progress &&
 131             (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
 132                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 133                       le16_to_cpu(priv->switch_rxon.channel));
 134                 priv->switch_rxon.switch_in_progress = false;
 135         }
 136
 137         /* If we don't need to send a full RXON, we can use
 138          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 139          * and other flags for the current radio configuration. */
 140         if (!iwl_full_rxon_required(priv)) {
 141                 ret = iwl_send_rxon_assoc(priv);
 142                 if (ret) {
 143                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 144                         return ret;
 145                 }
 146
 147                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 148                 iwl_print_rx_config_cmd(priv);
 149                 return 0;
 150         }
 151
 152         /* station table will be cleared */
 153         priv->assoc_station_added = 0;
 154
 155         /* If we are currently associated and the new config requires
 156          * an RXON_ASSOC and the new config wants the associated mask enabled,
 157          * we must clear the associated from the active configuration
 158          * before we apply the new config */
 159         if (iwl_is_associated(priv) && new_assoc) {
 160                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 161                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 162
 163                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 164                                       sizeof(struct iwl_rxon_cmd),
 165                                       &priv->active_rxon);
 166
 167                 /* If the mask clearing failed then we set
 168                  * active_rxon back to what it was previously */
 169                 if (ret) {
 170                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 171                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 172                         return ret;
 173                 }
 174         }
 175
 176         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 177                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 178                        "* channel = %d\n"
 179                        "* bssid = %pM\n",
 180                        (new_assoc ? "" : "out"),
 181                        le16_to_cpu(priv->staging_rxon.channel),
 182                        priv->staging_rxon.bssid_addr);
 183
 184         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 185
 186         /* Apply the new configuration
 187          * RXON unassoc clears the station table in uCode, send it before
 188          * we add the bcast station. If assoc bit is set, we will send RXON
 189          * after having added the bcast and bssid station.
 190          */
 191         if (!new_assoc) {
 192                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 193                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 194                 if (ret) {
 195                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 196                         return ret;
 197                 }
 198                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 199         }
 200
 201         iwl_clear_stations_table(priv);
 202
 203         priv->start_calib = 0;
 204
 205         /* Add the broadcast address so we can send broadcast frames */
 206         iwl_add_bcast_station(priv);
 207
 208         /* If we have set the ASSOC_MSK and we are in BSS mode then
 209          * add the IWL_AP_ID to the station rate table */
 210         if (new_assoc) {
 211                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 212                         ret = iwl_rxon_add_station(priv,
 213                                            priv->active_rxon.bssid_addr, 1);
 214                         if (ret == IWL_INVALID_STATION) {
 215                                 IWL_ERR(priv,
 216                                         "Error adding AP address for TX.\n");
 217                                 return -EIO;
 218                         }
 219                         priv->assoc_station_added = 1;
 220                         if (priv->default_wep_key &&
 221                             iwl_send_static_wepkey_cmd(priv, 0))
 222                                 IWL_ERR(priv,
 223                                         "Could not send WEP static key.\n");
 224                 }
 225
 226                 /*
 227                  * allow CTS-to-self if possible for new association.
 228                  * this is relevant only for 5000 series and up,
 229                  * but will not damage 4965
 230                  */
 231                 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 232
 233                 /* Apply the new configuration
 234                  * RXON assoc doesn't clear the station table in uCode,
 235                  */
 236                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 237                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 238                 if (ret) {
 239                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 240                         return ret;
 241                 }
 242                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 243         }
 244         iwl_print_rx_config_cmd(priv);
 245
 246         iwl_init_sensitivity(priv);
 247
 248         /* If we issue a new RXON command which required a tune then we must
 249          * send a new TXPOWER command or we won't be able to Tx any frames */
 250         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 251         if (ret) {
 252                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 253                 return ret;
 254         }
 255
 256         return 0;
 257 }
 258
 259 void iwl_update_chain_flags(struct iwl_priv *priv)
 260 {
 261
 262         if (priv->cfg->ops->hcmd->set_rxon_chain)
 263                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 264         iwlcore_commit_rxon(priv);
 265 }
 266
 267 static void iwl_clear_free_frames(struct iwl_priv *priv)
 268 {
 269         struct list_head *element;
 270
 271         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 272                        priv->frames_count);
 273
 274         while (!list_empty(&priv->free_frames)) {
 275                 element = priv->free_frames.next;
 276                 list_del(element);
 277                 kfree(list_entry(element, struct iwl_frame, list));
 278                 priv->frames_count--;
 279         }
 280
 281         if (priv->frames_count) {
 282                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 283                             priv->frames_count);
 284                 priv->frames_count = 0;
 285         }
 286 }
 287
 288 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 289 {
 290         struct iwl_frame *frame;
 291         struct list_head *element;
 292         if (list_empty(&priv->free_frames)) {
 293                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 294                 if (!frame) {
 295                         IWL_ERR(priv, "Could not allocate frame!\n");
 296                         return NULL;
 297                 }
 298
 299                 priv->frames_count++;
 300                 return frame;
 301         }
 302
 303         element = priv->free_frames.next;
 304         list_del(element);
 305         return list_entry(element, struct iwl_frame, list);
 306 }
 307
 308 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 309 {
 310         memset(frame, 0, sizeof(*frame));
 311         list_add(&frame->list, &priv->free_frames);
 312 }
 313
 314 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
 315                                           struct ieee80211_hdr *hdr,
 316                                           int left)
 317 {
 318         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 319             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 320              (priv->iw_mode != NL80211_IFTYPE_AP)))
 321                 return 0;
 322
 323         if (priv->ibss_beacon->len > left)
 324                 return 0;
 325
 326         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 327
 328         return priv->ibss_beacon->len;
 329 }
 330
 331 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 332 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 333                 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 334                 u8 *beacon, u32 frame_size)
 335 {
 336         u16 tim_idx;
 337         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 338
 339         /*
 340          * The index is relative to frame start but we start looking at the
 341          * variable-length part of the beacon.
 342          */
 343         tim_idx = mgmt->u.beacon.variable - beacon;
 344
 345         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 346         while ((tim_idx < (frame_size - 2)) &&
 347                         (beacon[tim_idx] != WLAN_EID_TIM))
 348                 tim_idx += beacon[tim_idx+1] + 2;
 349
 350         /* If TIM field was found, set variables */
 351         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 352                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 353                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 354         } else
 355                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 356 }
 357
 358 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 359                                        struct iwl_frame *frame)
 360 {
 361         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 362         u32 frame_size;
 363         u32 rate_flags;
 364         u32 rate;
 365         /*
 366          * We have to set up the TX command, the TX Beacon command, and the
 367          * beacon contents.
 368          */
 369
 370         /* Initialize memory */
 371         tx_beacon_cmd = &frame->u.beacon;
 372         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 373
 374         /* Set up TX beacon contents */
 375         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 376                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 377         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
 378                 return 0;
 379
 380         /* Set up TX command fields */
 381         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 382         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 383         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 384         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 385                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 386
 387         /* Set up TX beacon command fields */
 388         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
 389                         frame_size);
 390
 391         /* Set up packet rate and flags */
 392         rate = iwl_rate_get_lowest_plcp(priv);
 393         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
 394         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 395         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
 396                 rate_flags |= RATE_MCS_CCK_MSK;
 397         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
 398                         rate_flags);
 399
 400         return sizeof(*tx_beacon_cmd) + frame_size;
 401 }
 402 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 403 {
 404         struct iwl_frame *frame;
 405         unsigned int frame_size;
 406         int rc;
 407
 408         frame = iwl_get_free_frame(priv);
 409         if (!frame) {
 410                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 411                           "command.\n");
 412                 return -ENOMEM;
 413         }
 414
 415         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
 416         if (!frame_size) {
 417                 IWL_ERR(priv, "Error configuring the beacon command\n");
 418                 iwl_free_frame(priv, frame);
 419                 return -EINVAL;
 420         }
 421
 422         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 423                               &frame->u.cmd[0]);
 424
 425         iwl_free_frame(priv, frame);
 426
 427         return rc;
 428 }
 429
 430 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 431 {
 432         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 433
 434         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 435         if (sizeof(dma_addr_t) > sizeof(u32))
 436                 addr |=
 437                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 438
 439         return addr;
 440 }
 441
 442 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 443 {
 444         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 445
 446         return le16_to_cpu(tb->hi_n_len) >> 4;
 447 }
 448
 449 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 450                                   dma_addr_t addr, u16 len)
 451 {
 452         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 453         u16 hi_n_len = len << 4;
 454
 455         put_unaligned_le32(addr, &tb->lo);
 456         if (sizeof(dma_addr_t) > sizeof(u32))
 457                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 458
 459         tb->hi_n_len = cpu_to_le16(hi_n_len);
 460
 461         tfd->num_tbs = idx + 1;
 462 }
 463
 464 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 465 {
 466         return tfd->num_tbs & 0x1f;
 467 }
 468
 469 /**
 470  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 471  * @priv - driver private data
 472  * @txq - tx queue
 473  *
 474  * Does NOT advance any TFD circular buffer read/write indexes
 475  * Does NOT free the TFD itself (which is within circular buffer)
 476  */
 477 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 478 {
 479         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 480         struct iwl_tfd *tfd;
 481         struct pci_dev *dev = priv->pci_dev;
 482         int index = txq->q.read_ptr;
 483         int i;
 484         int num_tbs;
 485
 486         tfd = &tfd_tmp[index];
 487
 488         /* Sanity check on number of chunks */
 489         num_tbs = iwl_tfd_get_num_tbs(tfd);
 490
 491         if (num_tbs >= IWL_NUM_OF_TBS) {
 492                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 493                 /* @todo issue fatal error, it is quite serious situation */
 494                 return;
 495         }
 496
 497         /* Unmap tx_cmd */
 498         if (num_tbs)
 499                 pci_unmap_single(dev,
 500                                 pci_unmap_addr(&txq->meta[index], mapping),
 501                                 pci_unmap_len(&txq->meta[index], len),
 502                                 PCI_DMA_BIDIRECTIONAL);
 503
 504         /* Unmap chunks, if any. */
 505         for (i = 1; i < num_tbs; i++) {
 506                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 507                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 508
 509                 if (txq->txb) {
 510                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 511                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 512                 }
 513         }
 514 }
 515
 516 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 517                                  struct iwl_tx_queue *txq,
 518                                  dma_addr_t addr, u16 len,
 519                                  u8 reset, u8 pad)
 520 {
 521         struct iwl_queue *q;
 522         struct iwl_tfd *tfd, *tfd_tmp;
 523         u32 num_tbs;
 524
 525         q = &txq->q;
 526         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 527         tfd = &tfd_tmp[q->write_ptr];
 528
 529         if (reset)
 530                 memset(tfd, 0, sizeof(*tfd));
 531
 532         num_tbs = iwl_tfd_get_num_tbs(tfd);
 533
 534         /* Each TFD can point to a maximum 20 Tx buffers */
 535         if (num_tbs >= IWL_NUM_OF_TBS) {
 536                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 537                           IWL_NUM_OF_TBS);
 538                 return -EINVAL;
 539         }
 540
 541         BUG_ON(addr & ~DMA_BIT_MASK(36));
 542         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 543                 IWL_ERR(priv, "Unaligned address = %llx\n",
 544                           (unsigned long long)addr);
 545
 546         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 547
 548         return 0;
 549 }
 550
 551 /*
 552  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 553  * given Tx queue, and enable the DMA channel used for that queue.
 554  *
 555  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 556  * channels supported in hardware.
 557  */
 558 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 559                          struct iwl_tx_queue *txq)
 560 {
 561         int txq_id = txq->q.id;
 562
 563         /* Circular buffer (TFD queue in DRAM) physical base address */
 564         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 565                              txq->q.dma_addr >> 8);
 566
 567         return 0;
 568 }
 569
 570 /******************************************************************************
 571  *
 572  * Generic RX handler implementations
 573  *
 574  ******************************************************************************/
 575 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 576                                 struct iwl_rx_mem_buffer *rxb)
 577 {
 578         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 579         struct iwl_alive_resp *palive;
 580         struct delayed_work *pwork;
 581
 582         palive = &pkt->u.alive_frame;
 583
 584         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 585                        "0x%01X 0x%01X\n",
 586                        palive->is_valid, palive->ver_type,
 587                        palive->ver_subtype);
 588
 589         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 590                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 591                 memcpy(&priv->card_alive_init,
 592                        &pkt->u.alive_frame,
 593                        sizeof(struct iwl_init_alive_resp));
 594                 pwork = &priv->init_alive_start;
 595         } else {
 596                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 597                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 598                        sizeof(struct iwl_alive_resp));
 599                 pwork = &priv->alive_start;
 600         }
 601
 602         /* We delay the ALIVE response by 5ms to
 603          * give the HW RF Kill time to activate... */
 604         if (palive->is_valid == UCODE_VALID_OK)
 605                 queue_delayed_work(priv->workqueue, pwork,
 606                                    msecs_to_jiffies(5));
 607         else
 608                 IWL_WARN(priv, "uCode did not respond OK.\n");
 609 }
 610
 611 static void iwl_bg_beacon_update(struct work_struct *work)
 612 {
 613         struct iwl_priv *priv =
 614                 container_of(work, struct iwl_priv, beacon_update);
 615         struct sk_buff *beacon;
 616
 617         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 618         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 619
 620         if (!beacon) {
 621                 IWL_ERR(priv, "update beacon failed\n");
 622                 return;
 623         }
 624
 625         mutex_lock(&priv->mutex);
 626         /* new beacon skb is allocated every time; dispose previous.*/
 627         if (priv->ibss_beacon)
 628                 dev_kfree_skb(priv->ibss_beacon);
 629
 630         priv->ibss_beacon = beacon;
 631         mutex_unlock(&priv->mutex);
 632
 633         iwl_send_beacon_cmd(priv);
 634 }
 635
 636 /**
 637  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 638  *
 639  * This callback is provided in order to send a statistics request.
 640  *
 641  * This timer function is continually reset to execute within
 642  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 643  * was received.  We need to ensure we receive the statistics in order
 644  * to update the temperature used for calibrating the TXPOWER.
 645  */
 646 static void iwl_bg_statistics_periodic(unsigned long data)
 647 {
 648         struct iwl_priv *priv = (struct iwl_priv *)data;
 649
 650         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 651                 return;
 652
 653         /* dont send host command if rf-kill is on */
 654         if (!iwl_is_ready_rf(priv))
 655                 return;
 656
 657         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 658 }
 659
 660
 661 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 662                                         u32 start_idx, u32 num_events,
 663                                         u32 mode)
 664 {
 665         u32 i;
 666         u32 ptr;        /* SRAM byte address of log data */
 667         u32 ev, time, data; /* event log data */
 668         unsigned long reg_flags;
 669
 670         if (mode == 0)
 671                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 672         else
 673                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 674
 675         /* Make sure device is powered up for SRAM reads */
 676         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 677         if (iwl_grab_nic_access(priv)) {
 678                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 679                 return;
 680         }
 681
 682         /* Set starting address; reads will auto-increment */
 683         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
 684         rmb();
 685
 686         /*
 687          * "time" is actually "data" for mode 0 (no timestamp).
 688          * place event id # at far right for easier visual parsing.
 689          */
 690         for (i = 0; i < num_events; i++) {
 691                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 692                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 693                 if (mode == 0) {
 694                         trace_iwlwifi_dev_ucode_cont_event(priv,
 695                                                         0, time, ev);
 696                 } else {
 697                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 698                         trace_iwlwifi_dev_ucode_cont_event(priv,
 699                                                 time, data, ev);
 700                 }
 701         }
 702         /* Allow device to power down */
 703         iwl_release_nic_access(priv);
 704         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 705 }
 706
 707 void iwl_continuous_event_trace(struct iwl_priv *priv)
 708 {
 709         u32 capacity;   /* event log capacity in # entries */
 710         u32 base;       /* SRAM byte address of event log header */
 711         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 712         u32 num_wraps;  /* # times uCode wrapped to top of log */
 713         u32 next_entry; /* index of next entry to be written by uCode */
 714
 715         if (priv->ucode_type == UCODE_INIT)
 716                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
 717         else
 718                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 719         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
 720                 capacity = iwl_read_targ_mem(priv, base);
 721                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
 722                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
 723                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
 724         } else
 725                 return;
 726
 727         if (num_wraps == priv->event_log.num_wraps) {
 728                 iwl_print_cont_event_trace(priv,
 729                                        base, priv->event_log.next_entry,
 730                                        next_entry - priv->event_log.next_entry,
 731                                        mode);
 732                 priv->event_log.non_wraps_count++;
 733         } else {
 734                 if ((num_wraps - priv->event_log.num_wraps) > 1)
 735                         priv->event_log.wraps_more_count++;
 736                 else
 737                         priv->event_log.wraps_once_count++;
 738                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 739                                 num_wraps - priv->event_log.num_wraps,
 740                                 next_entry, priv->event_log.next_entry);
 741                 if (next_entry < priv->event_log.next_entry) {
 742                         iwl_print_cont_event_trace(priv, base,
 743                                priv->event_log.next_entry,
 744                                capacity - priv->event_log.next_entry,
 745                                mode);
 746
 747                         iwl_print_cont_event_trace(priv, base, 0,
 748                                 next_entry, mode);
 749                 } else {
 750                         iwl_print_cont_event_trace(priv, base,
 751                                next_entry, capacity - next_entry,
 752                                mode);
 753
 754                         iwl_print_cont_event_trace(priv, base, 0,
 755                                 next_entry, mode);
 756                 }
 757         }
 758         priv->event_log.num_wraps = num_wraps;
 759         priv->event_log.next_entry = next_entry;
 760 }
 761
 762 /**
 763  * iwl_bg_ucode_trace - Timer callback to log ucode event
 764  *
 765  * The timer is continually set to execute every
 766  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 767  * this function is to perform continuous uCode event logging operation
 768  * if enabled
 769  */
 770 static void iwl_bg_ucode_trace(unsigned long data)
 771 {
 772         struct iwl_priv *priv = (struct iwl_priv *)data;
 773
 774         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 775                 return;
 776
 777         if (priv->event_log.ucode_trace) {
 778                 iwl_continuous_event_trace(priv);
 779                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 780                 mod_timer(&priv->ucode_trace,
 781                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 782         }
 783 }
 784
 785 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 786                                 struct iwl_rx_mem_buffer *rxb)
 787 {
 788 #ifdef CONFIG_IWLWIFI_DEBUG
 789         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 790         struct iwl4965_beacon_notif *beacon =
 791                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 792         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 793
 794         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 795                 "tsf %d %d rate %d\n",
 796                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 797                 beacon->beacon_notify_hdr.failure_frame,
 798                 le32_to_cpu(beacon->ibss_mgr_status),
 799                 le32_to_cpu(beacon->high_tsf),
 800                 le32_to_cpu(beacon->low_tsf), rate);
 801 #endif
 802
 803         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 804             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 805                 queue_work(priv->workqueue, &priv->beacon_update);
 806 }
 807
 808 /* Handle notification from uCode that card's power state is changing
 809  * due to software, hardware, or critical temperature RFKILL */
 810 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 811                                     struct iwl_rx_mem_buffer *rxb)
 812 {
 813         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 814         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 815         unsigned long status = priv->status;
 816
 817         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 818                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 819                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 820                           (flags & CT_CARD_DISABLED) ?
 821                           "Reached" : "Not reached");
 822
 823         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 824                      CT_CARD_DISABLED)) {
 825
 826                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 827                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 828
 829                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 830                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 831
 832                 if (!(flags & RXON_CARD_DISABLED)) {
 833                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 834                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 835                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 836                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 837                 }
 838                 if (flags & CT_CARD_DISABLED)
 839                         iwl_tt_enter_ct_kill(priv);
 840         }
 841         if (!(flags & CT_CARD_DISABLED))
 842                 iwl_tt_exit_ct_kill(priv);
 843
 844         if (flags & HW_CARD_DISABLED)
 845                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 846         else
 847                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 848
 849
 850         if (!(flags & RXON_CARD_DISABLED))
 851                 iwl_scan_cancel(priv);
 852
 853         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 854              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 855                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 856                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 857         else
 858                 wake_up_interruptible(&priv->wait_command_queue);
 859 }
 860
 861 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 862 {
 863         if (src == IWL_PWR_SRC_VAUX) {
 864                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 865                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 866                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 867                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 868         } else {
 869                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 870                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 871                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 872         }
 873
 874         return 0;
 875 }
 876
 877 /**
 878  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 879  *
 880  * Setup the RX handlers for each of the reply types sent from the uCode
 881  * to the host.
 882  *
 883  * This function chains into the hardware specific files for them to setup
 884  * any hardware specific handlers as well.
 885  */
 886 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 887 {
 888         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 889         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 890         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 891         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 892         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 893             iwl_rx_pm_debug_statistics_notif;
 894         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 895
 896         /*
 897          * The same handler is used for both the REPLY to a discrete
 898          * statistics request from the host as well as for the periodic
 899          * statistics notifications (after received beacons) from the uCode.
 900          */
 901         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
 902         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 903
 904         iwl_setup_spectrum_handlers(priv);
 905         iwl_setup_rx_scan_handlers(priv);
 906
 907         /* status change handler */
 908         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 909
 910         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 911             iwl_rx_missed_beacon_notif;
 912         /* Rx handlers */
 913         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 914         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 915         /* block ack */
 916         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 917         /* Set up hardware specific Rx handlers */
 918         priv->cfg->ops->lib->rx_handler_setup(priv);
 919 }
 920
 921 /**
 922  * iwl_rx_handle - Main entry function for receiving responses from uCode
 923  *
 924  * Uses the priv->rx_handlers callback function array to invoke
 925  * the appropriate handlers, including command responses,
 926  * frame-received notifications, and other notifications.
 927  */
 928 void iwl_rx_handle(struct iwl_priv *priv)
 929 {
 930         struct iwl_rx_mem_buffer *rxb;
 931         struct iwl_rx_packet *pkt;
 932         struct iwl_rx_queue *rxq = &priv->rxq;
 933         u32 r, i;
 934         int reclaim;
 935         unsigned long flags;
 936         u8 fill_rx = 0;
 937         u32 count = 8;
 938         int total_empty;
 939
 940         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 941          * buffer that the driver may process (last buffer filled by ucode). */
 942         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 943         i = rxq->read;
 944
 945         /* Rx interrupt, but nothing sent from uCode */
 946         if (i == r)
 947                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 948
 949         /* calculate total frames need to be restock after handling RX */
 950         total_empty = r - rxq->write_actual;
 951         if (total_empty < 0)
 952                 total_empty += RX_QUEUE_SIZE;
 953
 954         if (total_empty > (RX_QUEUE_SIZE / 2))
 955                 fill_rx = 1;
 956
 957         while (i != r) {
 958                 rxb = rxq->queue[i];
 959
 960                 /* If an RXB doesn't have a Rx queue slot associated with it,
 961                  * then a bug has been introduced in the queue refilling
 962                  * routines -- catch it here */
 963                 BUG_ON(rxb == NULL);
 964
 965                 rxq->queue[i] = NULL;
 966
 967                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
 968                                PAGE_SIZE << priv->hw_params.rx_page_order,
 969                                PCI_DMA_FROMDEVICE);
 970                 pkt = rxb_addr(rxb);
 971
 972                 trace_iwlwifi_dev_rx(priv, pkt,
 973                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
 974
 975                 /* Reclaim a command buffer only if this packet is a response
 976                  *   to a (driver-originated) command.
 977                  * If the packet (e.g. Rx frame) originated from uCode,
 978                  *   there is no command buffer to reclaim.
 979                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 980                  *   but apparently a few don't get set; catch them here. */
 981                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 982                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 983                         (pkt->hdr.cmd != REPLY_RX) &&
 984                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 985                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 986                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 987                         (pkt->hdr.cmd != REPLY_TX);
 988
 989                 /* Based on type of command response or notification,
 990                  *   handle those that need handling via function in
 991                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 992                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 993                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 994                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 995                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 996                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 997                 } else {
 998                         /* No handling needed */
 999                         IWL_DEBUG_RX(priv,
1000                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1001                                 r, i, get_cmd_string(pkt->hdr.cmd),
1002                                 pkt->hdr.cmd);
1003                 }
1004
1005                 /*
1006                  * XXX: After here, we should always check rxb->page
1007                  * against NULL before touching it or its virtual
1008                  * memory (pkt). Because some rx_handler might have
1009                  * already taken or freed the pages.
1010                  */
1011
1012                 if (reclaim) {
1013                         /* Invoke any callbacks, transfer the buffer to caller,
1014                          * and fire off the (possibly) blocking iwl_send_cmd()
1015                          * as we reclaim the driver command queue */
1016                         if (rxb->page)
1017                                 iwl_tx_cmd_complete(priv, rxb);
1018                         else
1019                                 IWL_WARN(priv, "Claim null rxb?\n");
1020                 }
1021
1022                 /* Reuse the page if possible. For notification packets and
1023                  * SKBs that fail to Rx correctly, add them back into the
1024                  * rx_free list for reuse later. */
1025                 spin_lock_irqsave(&rxq->lock, flags);
1026                 if (rxb->page != NULL) {
1027                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1028                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1029                                 PCI_DMA_FROMDEVICE);
1030                         list_add_tail(&rxb->list, &rxq->rx_free);
1031                         rxq->free_count++;
1032                 } else
1033                         list_add_tail(&rxb->list, &rxq->rx_used);
1034
1035                 spin_unlock_irqrestore(&rxq->lock, flags);
1036
1037                 i = (i + 1) & RX_QUEUE_MASK;
1038                 /* If there are a lot of unused frames,
1039                  * restock the Rx queue so ucode wont assert. */
1040                 if (fill_rx) {
1041                         count++;
1042                         if (count >= 8) {
1043                                 rxq->read = i;
1044                                 iwl_rx_replenish_now(priv);
1045                                 count = 0;
1046                         }
1047                 }
1048         }
1049
1050         /* Backtrack one entry */
1051         rxq->read = i;
1052         if (fill_rx)
1053                 iwl_rx_replenish_now(priv);
1054         else
1055                 iwl_rx_queue_restock(priv);
1056 }
1057
1058 /* call this function to flush any scheduled tasklet */
1059 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1060 {
1061         /* wait to make sure we flush pending tasklet*/
1062         synchronize_irq(priv->pci_dev->irq);
1063         tasklet_kill(&priv->irq_tasklet);
1064 }
1065
1066 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
1067 {
1068         u32 inta, handled = 0;
1069         u32 inta_fh;
1070         unsigned long flags;
1071         u32 i;
1072 #ifdef CONFIG_IWLWIFI_DEBUG
1073         u32 inta_mask;
1074 #endif
1075
1076         spin_lock_irqsave(&priv->lock, flags);
1077
1078         /* Ack/clear/reset pending uCode interrupts.
1079          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1080          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1081         inta = iwl_read32(priv, CSR_INT);
1082         iwl_write32(priv, CSR_INT, inta);
1083
1084         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1085          * Any new interrupts that happen after this, either while we're
1086          * in this tasklet, or later, will show up in next ISR/tasklet. */
1087         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1088         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1089
1090 #ifdef CONFIG_IWLWIFI_DEBUG
1091         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1092                 /* just for debug */
1093                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1094                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1095                               inta, inta_mask, inta_fh);
1096         }
1097 #endif
1098
1099         spin_unlock_irqrestore(&priv->lock, flags);
1100
1101         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1102          * atomic, make sure that inta covers all the interrupts that
1103          * we've discovered, even if FH interrupt came in just after
1104          * reading CSR_INT. */
1105         if (inta_fh & CSR49_FH_INT_RX_MASK)
1106                 inta |= CSR_INT_BIT_FH_RX;
1107         if (inta_fh & CSR49_FH_INT_TX_MASK)
1108                 inta |= CSR_INT_BIT_FH_TX;
1109
1110         /* Now service all interrupt bits discovered above. */
1111         if (inta & CSR_INT_BIT_HW_ERR) {
1112                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1113
1114                 /* Tell the device to stop sending interrupts */
1115                 iwl_disable_interrupts(priv);
1116
1117                 priv->isr_stats.hw++;
1118                 iwl_irq_handle_error(priv);
1119
1120                 handled |= CSR_INT_BIT_HW_ERR;
1121
1122                 return;
1123         }
1124
1125 #ifdef CONFIG_IWLWIFI_DEBUG
1126         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1127                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1128                 if (inta & CSR_INT_BIT_SCD) {
1129                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1130                                       "the frame/frames.\n");
1131                         priv->isr_stats.sch++;
1132                 }
1133
1134                 /* Alive notification via Rx interrupt will do the real work */
1135                 if (inta & CSR_INT_BIT_ALIVE) {
1136                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1137                         priv->isr_stats.alive++;
1138                 }
1139         }
1140 #endif
1141         /* Safely ignore these bits for debug checks below */
1142         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1143
1144         /* HW RF KILL switch toggled */
1145         if (inta & CSR_INT_BIT_RF_KILL) {
1146                 int hw_rf_kill = 0;
1147                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1148                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1149                         hw_rf_kill = 1;
1150
1151                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1152                                 hw_rf_kill ? "disable radio" : "enable radio");
1153
1154                 priv->isr_stats.rfkill++;
1155
1156                 /* driver only loads ucode once setting the interface up.
1157                  * the driver allows loading the ucode even if the radio
1158                  * is killed. Hence update the killswitch state here. The
1159                  * rfkill handler will care about restarting if needed.
1160                  */
1161                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1162                         if (hw_rf_kill)
1163                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1164                         else
1165                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1166                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1167                 }
1168
1169                 handled |= CSR_INT_BIT_RF_KILL;
1170         }
1171
1172         /* Chip got too hot and stopped itself */
1173         if (inta & CSR_INT_BIT_CT_KILL) {
1174                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1175                 priv->isr_stats.ctkill++;
1176                 handled |= CSR_INT_BIT_CT_KILL;
1177         }
1178
1179         /* Error detected by uCode */
1180         if (inta & CSR_INT_BIT_SW_ERR) {
1181                 IWL_ERR(priv, "Microcode SW error detected. "
1182                         " Restarting 0x%X.\n", inta);
1183                 priv->isr_stats.sw++;
1184                 priv->isr_stats.sw_err = inta;
1185                 iwl_irq_handle_error(priv);
1186                 handled |= CSR_INT_BIT_SW_ERR;
1187         }
1188
1189         /*
1190          * uCode wakes up after power-down sleep.
1191          * Tell device about any new tx or host commands enqueued,
1192          * and about any Rx buffers made available while asleep.
1193          */
1194         if (inta & CSR_INT_BIT_WAKEUP) {
1195                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1196                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1197                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1198                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1199                 priv->isr_stats.wakeup++;
1200                 handled |= CSR_INT_BIT_WAKEUP;
1201         }
1202
1203         /* All uCode command responses, including Tx command responses,
1204          * Rx "responses" (frame-received notification), and other
1205          * notifications from uCode come through here*/
1206         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1207                 iwl_rx_handle(priv);
1208                 priv->isr_stats.rx++;
1209                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1210         }
1211
1212         /* This "Tx" DMA channel is used only for loading uCode */
1213         if (inta & CSR_INT_BIT_FH_TX) {
1214                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1215                 priv->isr_stats.tx++;
1216                 handled |= CSR_INT_BIT_FH_TX;
1217                 /* Wake up uCode load routine, now that load is complete */
1218                 priv->ucode_write_complete = 1;
1219                 wake_up_interruptible(&priv->wait_command_queue);
1220         }
1221
1222         if (inta & ~handled) {
1223                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1224                 priv->isr_stats.unhandled++;
1225         }
1226
1227         if (inta & ~(priv->inta_mask)) {
1228                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1229                          inta & ~priv->inta_mask);
1230                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1231         }
1232
1233         /* Re-enable all interrupts */
1234         /* only Re-enable if diabled by irq */
1235         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1236                 iwl_enable_interrupts(priv);
1237
1238 #ifdef CONFIG_IWLWIFI_DEBUG
1239         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1240                 inta = iwl_read32(priv, CSR_INT);
1241                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1242                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1243                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1244                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1245         }
1246 #endif
1247 }
1248
1249 /* tasklet for iwlagn interrupt */
1250 static void iwl_irq_tasklet(struct iwl_priv *priv)
1251 {
1252         u32 inta = 0;
1253         u32 handled = 0;
1254         unsigned long flags;
1255         u32 i;
1256 #ifdef CONFIG_IWLWIFI_DEBUG
1257         u32 inta_mask;
1258 #endif
1259
1260         spin_lock_irqsave(&priv->lock, flags);
1261
1262         /* Ack/clear/reset pending uCode interrupts.
1263          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1264          */
1265         iwl_write32(priv, CSR_INT, priv->inta);
1266
1267         inta = priv->inta;
1268
1269 #ifdef CONFIG_IWLWIFI_DEBUG
1270         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1271                 /* just for debug */
1272                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1273                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1274                                 inta, inta_mask);
1275         }
1276 #endif
1277
1278         spin_unlock_irqrestore(&priv->lock, flags);
1279
1280         /* saved interrupt in inta variable now we can reset priv->inta */
1281         priv->inta = 0;
1282
1283         /* Now service all interrupt bits discovered above. */
1284         if (inta & CSR_INT_BIT_HW_ERR) {
1285                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1286
1287                 /* Tell the device to stop sending interrupts */
1288                 iwl_disable_interrupts(priv);
1289
1290                 priv->isr_stats.hw++;
1291                 iwl_irq_handle_error(priv);
1292
1293                 handled |= CSR_INT_BIT_HW_ERR;
1294
1295                 return;
1296         }
1297
1298 #ifdef CONFIG_IWLWIFI_DEBUG
1299         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1300                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1301                 if (inta & CSR_INT_BIT_SCD) {
1302                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1303                                       "the frame/frames.\n");
1304                         priv->isr_stats.sch++;
1305                 }
1306
1307                 /* Alive notification via Rx interrupt will do the real work */
1308                 if (inta & CSR_INT_BIT_ALIVE) {
1309                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1310                         priv->isr_stats.alive++;
1311                 }
1312         }
1313 #endif
1314         /* Safely ignore these bits for debug checks below */
1315         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1316
1317         /* HW RF KILL switch toggled */
1318         if (inta & CSR_INT_BIT_RF_KILL) {
1319                 int hw_rf_kill = 0;
1320                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1321                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1322                         hw_rf_kill = 1;
1323
1324                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1325                                 hw_rf_kill ? "disable radio" : "enable radio");
1326
1327                 priv->isr_stats.rfkill++;
1328
1329                 /* driver only loads ucode once setting the interface up.
1330                  * the driver allows loading the ucode even if the radio
1331                  * is killed. Hence update the killswitch state here. The
1332                  * rfkill handler will care about restarting if needed.
1333                  */
1334                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1335                         if (hw_rf_kill)
1336                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1337                         else
1338                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1339                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1340                 }
1341
1342                 handled |= CSR_INT_BIT_RF_KILL;
1343         }
1344
1345         /* Chip got too hot and stopped itself */
1346         if (inta & CSR_INT_BIT_CT_KILL) {
1347                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1348                 priv->isr_stats.ctkill++;
1349                 handled |= CSR_INT_BIT_CT_KILL;
1350         }
1351
1352         /* Error detected by uCode */
1353         if (inta & CSR_INT_BIT_SW_ERR) {
1354                 IWL_ERR(priv, "Microcode SW error detected. "
1355                         " Restarting 0x%X.\n", inta);
1356                 priv->isr_stats.sw++;
1357                 priv->isr_stats.sw_err = inta;
1358                 iwl_irq_handle_error(priv);
1359                 handled |= CSR_INT_BIT_SW_ERR;
1360         }
1361
1362         /* uCode wakes up after power-down sleep */
1363         if (inta & CSR_INT_BIT_WAKEUP) {
1364                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1365                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1366                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1367                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1368
1369                 priv->isr_stats.wakeup++;
1370
1371                 handled |= CSR_INT_BIT_WAKEUP;
1372         }
1373
1374         /* All uCode command responses, including Tx command responses,
1375          * Rx "responses" (frame-received notification), and other
1376          * notifications from uCode come through here*/
1377         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1378                         CSR_INT_BIT_RX_PERIODIC)) {
1379                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1380                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1381                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1382                         iwl_write32(priv, CSR_FH_INT_STATUS,
1383                                         CSR49_FH_INT_RX_MASK);
1384                 }
1385                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1386                         handled |= CSR_INT_BIT_RX_PERIODIC;
1387                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1388                 }
1389                 /* Sending RX interrupt require many steps to be done in the
1390                  * the device:
1391                  * 1- write interrupt to current index in ICT table.
1392                  * 2- dma RX frame.
1393                  * 3- update RX shared data to indicate last write index.
1394                  * 4- send interrupt.
1395                  * This could lead to RX race, driver could receive RX interrupt
1396                  * but the shared data changes does not reflect this;
1397                  * periodic interrupt will detect any dangling Rx activity.
1398                  */
1399
1400                 /* Disable periodic interrupt; we use it as just a one-shot. */
1401                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1402                             CSR_INT_PERIODIC_DIS);
1403                 iwl_rx_handle(priv);
1404
1405                 /*
1406                  * Enable periodic interrupt in 8 msec only if we received
1407                  * real RX interrupt (instead of just periodic int), to catch
1408                  * any dangling Rx interrupt.  If it was just the periodic
1409                  * interrupt, there was no dangling Rx activity, and no need
1410                  * to extend the periodic interrupt; one-shot is enough.
1411                  */
1412                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1413                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1414                                     CSR_INT_PERIODIC_ENA);
1415
1416                 priv->isr_stats.rx++;
1417         }
1418
1419         /* This "Tx" DMA channel is used only for loading uCode */
1420         if (inta & CSR_INT_BIT_FH_TX) {
1421                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1422                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1423                 priv->isr_stats.tx++;
1424                 handled |= CSR_INT_BIT_FH_TX;
1425                 /* Wake up uCode load routine, now that load is complete */
1426                 priv->ucode_write_complete = 1;
1427                 wake_up_interruptible(&priv->wait_command_queue);
1428         }
1429
1430         if (inta & ~handled) {
1431                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1432                 priv->isr_stats.unhandled++;
1433         }
1434
1435         if (inta & ~(priv->inta_mask)) {
1436                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1437                          inta & ~priv->inta_mask);
1438         }
1439
1440         /* Re-enable all interrupts */
1441         /* only Re-enable if diabled by irq */
1442         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1443                 iwl_enable_interrupts(priv);
1444 }
1445
1446
1447 /******************************************************************************
1448  *
1449  * uCode download functions
1450  *
1451  ******************************************************************************/
1452
1453 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1454 {
1455         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1456         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1457         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1458         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1459         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1460         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1461 }
1462
1463 static void iwl_nic_start(struct iwl_priv *priv)
1464 {
1465         /* Remove all resets to allow NIC to operate */
1466         iwl_write32(priv, CSR_RESET, 0);
1467 }
1468
1469
1470 /**
1471  * iwl_read_ucode - Read uCode images from disk file.
1472  *
1473  * Copy into buffers for card to fetch via bus-mastering
1474  */
1475 static int iwl_read_ucode(struct iwl_priv *priv)
1476 {
1477         struct iwl_ucode_header *ucode;
1478         int ret = -EINVAL, index;
1479         const struct firmware *ucode_raw;
1480         const char *name_pre = priv->cfg->fw_name_pre;
1481         const unsigned int api_max = priv->cfg->ucode_api_max;
1482         const unsigned int api_min = priv->cfg->ucode_api_min;
1483         char buf[25];
1484         u8 *src;
1485         size_t len;
1486         u32 api_ver, build;
1487         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1488         u16 eeprom_ver;
1489
1490         /* Ask kernel firmware_class module to get the boot firmware off disk.
1491          * request_firmware() is synchronous, file is in memory on return. */
1492         for (index = api_max; index >= api_min; index--) {
1493                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1494                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1495                 if (ret < 0) {
1496                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1497                                   buf, ret);
1498                         if (ret == -ENOENT)
1499                                 continue;
1500                         else
1501                                 goto error;
1502                 } else {
1503                         if (index < api_max)
1504                                 IWL_ERR(priv, "Loaded firmware %s, "
1505                                         "which is deprecated. "
1506                                         "Please use API v%u instead.\n",
1507                                           buf, api_max);
1508
1509                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1510                                        buf, ucode_raw->size);
1511                         break;
1512                 }
1513         }
1514
1515         if (ret < 0)
1516                 goto error;
1517
1518         /* Make sure that we got at least the v1 header! */
1519         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1520                 IWL_ERR(priv, "File size way too small!\n");
1521                 ret = -EINVAL;
1522                 goto err_release;
1523         }
1524
1525         /* Data from ucode file:  header followed by uCode images */
1526         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1527
1528         priv->ucode_ver = le32_to_cpu(ucode->ver);
1529         api_ver = IWL_UCODE_API(priv->ucode_ver);
1530         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1531         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1532         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1533         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1534         init_data_size =
1535                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1536         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1537         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1538
1539         /* api_ver should match the api version forming part of the
1540          * firmware filename ... but we don't check for that and only rely
1541          * on the API version read from firmware header from here on forward */
1542
1543         if (api_ver < api_min || api_ver > api_max) {
1544                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1545                           "Driver supports v%u, firmware is v%u.\n",
1546                           api_max, api_ver);
1547                 priv->ucode_ver = 0;
1548                 ret = -EINVAL;
1549                 goto err_release;
1550         }
1551         if (api_ver != api_max)
1552                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1553                           "got v%u. New firmware can be obtained "
1554                           "from http://www.intellinuxwireless.org.\n",
1555                           api_max, api_ver);
1556
1557         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1558                IWL_UCODE_MAJOR(priv->ucode_ver),
1559                IWL_UCODE_MINOR(priv->ucode_ver),
1560                IWL_UCODE_API(priv->ucode_ver),
1561                IWL_UCODE_SERIAL(priv->ucode_ver));
1562
1563         snprintf(priv->hw->wiphy->fw_version,
1564                  sizeof(priv->hw->wiphy->fw_version),
1565                  "%u.%u.%u.%u",
1566                  IWL_UCODE_MAJOR(priv->ucode_ver),
1567                  IWL_UCODE_MINOR(priv->ucode_ver),
1568                  IWL_UCODE_API(priv->ucode_ver),
1569                  IWL_UCODE_SERIAL(priv->ucode_ver));
1570
1571         if (build)
1572                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1573
1574         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1575         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1576                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1577                        ? "OTP" : "EEPROM", eeprom_ver);
1578
1579         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1580                        priv->ucode_ver);
1581         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1582                        inst_size);
1583         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1584                        data_size);
1585         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1586                        init_size);
1587         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1588                        init_data_size);
1589         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1590                        boot_size);
1591
1592         /* Verify size of file vs. image size info in file's header */
1593         if (ucode_raw->size !=
1594                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1595                 inst_size + data_size + init_size +
1596                 init_data_size + boot_size) {
1597
1598                 IWL_DEBUG_INFO(priv,
1599                         "uCode file size %d does not match expected size\n",
1600                         (int)ucode_raw->size);
1601                 ret = -EINVAL;
1602                 goto err_release;
1603         }
1604
1605         /* Verify that uCode images will fit in card's SRAM */
1606         if (inst_size > priv->hw_params.max_inst_size) {
1607                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1608                                inst_size);
1609                 ret = -EINVAL;
1610                 goto err_release;
1611         }
1612
1613         if (data_size > priv->hw_params.max_data_size) {
1614                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1615                                 data_size);
1616                 ret = -EINVAL;
1617                 goto err_release;
1618         }
1619         if (init_size > priv->hw_params.max_inst_size) {
1620                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1621                         init_size);
1622                 ret = -EINVAL;
1623                 goto err_release;
1624         }
1625         if (init_data_size > priv->hw_params.max_data_size) {
1626                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1627                       init_data_size);
1628                 ret = -EINVAL;
1629                 goto err_release;
1630         }
1631         if (boot_size > priv->hw_params.max_bsm_size) {
1632                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1633                         boot_size);
1634                 ret = -EINVAL;
1635                 goto err_release;
1636         }
1637
1638         /* Allocate ucode buffers for card's bus-master loading ... */
1639
1640         /* Runtime instructions and 2 copies of data:
1641          * 1) unmodified from disk
1642          * 2) backup cache for save/restore during power-downs */
1643         priv->ucode_code.len = inst_size;
1644         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1645
1646         priv->ucode_data.len = data_size;
1647         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1648
1649         priv->ucode_data_backup.len = data_size;
1650         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1651
1652         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1653             !priv->ucode_data_backup.v_addr)
1654                 goto err_pci_alloc;
1655
1656         /* Initialization instructions and data */
1657         if (init_size && init_data_size) {
1658                 priv->ucode_init.len = init_size;
1659                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1660
1661                 priv->ucode_init_data.len = init_data_size;
1662                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1663
1664                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1665                         goto err_pci_alloc;
1666         }
1667
1668         /* Bootstrap (instructions only, no data) */
1669         if (boot_size) {
1670                 priv->ucode_boot.len = boot_size;
1671                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1672
1673                 if (!priv->ucode_boot.v_addr)
1674                         goto err_pci_alloc;
1675         }
1676
1677         /* Copy images into buffers for card's bus-master reads ... */
1678
1679         /* Runtime instructions (first block of data in file) */
1680         len = inst_size;
1681         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1682         memcpy(priv->ucode_code.v_addr, src, len);
1683         src += len;
1684
1685         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1686                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1687
1688         /* Runtime data (2nd block)
1689          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1690         len = data_size;
1691         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1692         memcpy(priv->ucode_data.v_addr, src, len);
1693         memcpy(priv->ucode_data_backup.v_addr, src, len);
1694         src += len;
1695
1696         /* Initialization instructions (3rd block) */
1697         if (init_size) {
1698                 len = init_size;
1699                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1700                                 len);
1701                 memcpy(priv->ucode_init.v_addr, src, len);
1702                 src += len;
1703         }
1704
1705         /* Initialization data (4th block) */
1706         if (init_data_size) {
1707                 len = init_data_size;
1708                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1709                                len);
1710                 memcpy(priv->ucode_init_data.v_addr, src, len);
1711                 src += len;
1712         }
1713
1714         /* Bootstrap instructions (5th block) */
1715         len = boot_size;
1716         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1717         memcpy(priv->ucode_boot.v_addr, src, len);
1718
1719         /* We have our copies now, allow OS release its copies */
1720         release_firmware(ucode_raw);
1721         return 0;
1722
1723  err_pci_alloc:
1724         IWL_ERR(priv, "failed to allocate pci memory\n");
1725         ret = -ENOMEM;
1726         iwl_dealloc_ucode_pci(priv);
1727
1728  err_release:
1729         release_firmware(ucode_raw);
1730
1731  error:
1732         return ret;
1733 }
1734
1735 static const char *desc_lookup_text[] = {
1736         "OK",
1737         "FAIL",
1738         "BAD_PARAM",
1739         "BAD_CHECKSUM",
1740         "NMI_INTERRUPT_WDG",
1741         "SYSASSERT",
1742         "FATAL_ERROR",
1743         "BAD_COMMAND",
1744         "HW_ERROR_TUNE_LOCK",
1745         "HW_ERROR_TEMPERATURE",
1746         "ILLEGAL_CHAN_FREQ",
1747         "VCC_NOT_STABLE",
1748         "FH_ERROR",
1749         "NMI_INTERRUPT_HOST",
1750         "NMI_INTERRUPT_ACTION_PT",
1751         "NMI_INTERRUPT_UNKNOWN",
1752         "UCODE_VERSION_MISMATCH",
1753         "HW_ERROR_ABS_LOCK",
1754         "HW_ERROR_CAL_LOCK_FAIL",
1755         "NMI_INTERRUPT_INST_ACTION_PT",
1756         "NMI_INTERRUPT_DATA_ACTION_PT",
1757         "NMI_TRM_HW_ER",
1758         "NMI_INTERRUPT_TRM",
1759         "NMI_INTERRUPT_BREAK_POINT"
1760         "DEBUG_0",
1761         "DEBUG_1",
1762         "DEBUG_2",
1763         "DEBUG_3",
1764         "UNKNOWN"
1765 };
1766
1767 static const char *desc_lookup(int i)
1768 {
1769         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1770
1771         if (i < 0 || i > max)
1772                 i = max;
1773
1774         return desc_lookup_text[i];
1775 }
1776
1777 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1778 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1779
1780 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1781 {
1782         u32 data2, line;
1783         u32 desc, time, count, base, data1;
1784         u32 blink1, blink2, ilink1, ilink2;
1785
1786         if (priv->ucode_type == UCODE_INIT)
1787                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1788         else
1789                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1790
1791         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1792                 IWL_ERR(priv,
1793                         "Not valid error log pointer 0x%08X for %s uCode\n",
1794                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1795                 return;
1796         }
1797
1798         count = iwl_read_targ_mem(priv, base);
1799
1800         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1801                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1802                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1803                         priv->status, count);
1804         }
1805
1806         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1807         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1808         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1809         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1810         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1811         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1812         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1813         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1814         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1815
1816         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1817                                       blink1, blink2, ilink1, ilink2);
1818
1819         IWL_ERR(priv, "Desc                               Time       "
1820                 "data1      data2      line\n");
1821         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1822                 desc_lookup(desc), desc, time, data1, data2, line);
1823         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1824         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1825                 ilink1, ilink2);
1826
1827 }
1828
1829 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1830
1831 /**
1832  * iwl_print_event_log - Dump error event log to syslog
1833  *
1834  */
1835 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1836                                u32 num_events, u32 mode,
1837                                int pos, char **buf, size_t bufsz)
1838 {
1839         u32 i;
1840         u32 base;       /* SRAM byte address of event log header */
1841         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1842         u32 ptr;        /* SRAM byte address of log data */
1843         u32 ev, time, data; /* event log data */
1844         unsigned long reg_flags;
1845
1846         if (num_events == 0)
1847                 return pos;
1848         if (priv->ucode_type == UCODE_INIT)
1849                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1850         else
1851                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1852
1853         if (mode == 0)
1854                 event_size = 2 * sizeof(u32);
1855         else
1856                 event_size = 3 * sizeof(u32);
1857
1858         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1859
1860         /* Make sure device is powered up for SRAM reads */
1861         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1862         iwl_grab_nic_access(priv);
1863
1864         /* Set starting address; reads will auto-increment */
1865         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1866         rmb();
1867
1868         /* "time" is actually "data" for mode 0 (no timestamp).
1869         * place event id # at far right for easier visual parsing. */
1870         for (i = 0; i < num_events; i++) {
1871                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1872                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1873                 if (mode == 0) {
1874                         /* data, ev */
1875                         if (bufsz) {
1876                                 pos += scnprintf(*buf + pos, bufsz - pos,
1877                                                 "EVT_LOG:0x%08x:%04u\n",
1878                                                 time, ev);
1879                         } else {
1880                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1881                                         time, ev);
1882                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1883                                         time, ev);
1884                         }
1885                 } else {
1886                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1887                         if (bufsz) {
1888                                 pos += scnprintf(*buf + pos, bufsz - pos,
1889                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1890                                                  time, data, ev);
1891                         } else {
1892                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1893                                         time, data, ev);
1894                                 trace_iwlwifi_dev_ucode_event(priv, time,
1895                                         data, ev);
1896                         }
1897                 }
1898         }
1899
1900         /* Allow device to power down */
1901         iwl_release_nic_access(priv);
1902         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1903         return pos;
1904 }
1905
1906 /**
1907  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1908  */
1909 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1910                                     u32 num_wraps, u32 next_entry,
1911                                     u32 size, u32 mode,
1912                                     int pos, char **buf, size_t bufsz)
1913 {
1914         /*
1915          * display the newest DEFAULT_LOG_ENTRIES entries
1916          * i.e the entries just before the next ont that uCode would fill.
1917          */
1918         if (num_wraps) {
1919                 if (next_entry < size) {
1920                         pos = iwl_print_event_log(priv,
1921                                                 capacity - (size - next_entry),
1922                                                 size - next_entry, mode,
1923                                                 pos, buf, bufsz);
1924                         pos = iwl_print_event_log(priv, 0,
1925                                                   next_entry, mode,
1926                                                   pos, buf, bufsz);
1927                 } else
1928                         pos = iwl_print_event_log(priv, next_entry - size,
1929                                                   size, mode, pos, buf, bufsz);
1930         } else {
1931                 if (next_entry < size) {
1932                         pos = iwl_print_event_log(priv, 0, next_entry,
1933                                                   mode, pos, buf, bufsz);
1934                 } else {
1935                         pos = iwl_print_event_log(priv, next_entry - size,
1936                                                   size, mode, pos, buf, bufsz);
1937                 }
1938         }
1939         return pos;
1940 }
1941
1942 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1943 #define MAX_EVENT_LOG_SIZE (512)
1944
1945 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1946
1947 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1948                             char **buf, bool display)
1949 {
1950         u32 base;       /* SRAM byte address of event log header */
1951         u32 capacity;   /* event log capacity in # entries */
1952         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1953         u32 num_wraps;  /* # times uCode wrapped to top of log */
1954         u32 next_entry; /* index of next entry to be written by uCode */
1955         u32 size;       /* # entries that we'll print */
1956         int pos = 0;
1957         size_t bufsz = 0;
1958
1959         if (priv->ucode_type == UCODE_INIT)
1960                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1961         else
1962                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1963
1964         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1965                 IWL_ERR(priv,
1966                         "Invalid event log pointer 0x%08X for %s uCode\n",
1967                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1968                 return pos;
1969         }
1970
1971         /* event log header */
1972         capacity = iwl_read_targ_mem(priv, base);
1973         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1974         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1975         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1976
1977         if (capacity > MAX_EVENT_LOG_SIZE) {
1978                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1979                         capacity, MAX_EVENT_LOG_SIZE);
1980                 capacity = MAX_EVENT_LOG_SIZE;
1981         }
1982
1983         if (next_entry > MAX_EVENT_LOG_SIZE) {
1984                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1985                         next_entry, MAX_EVENT_LOG_SIZE);
1986                 next_entry = MAX_EVENT_LOG_SIZE;
1987         }
1988
1989         size = num_wraps ? capacity : next_entry;
1990
1991         /* bail out if nothing in log */
1992         if (size == 0) {
1993                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1994                 return pos;
1995         }
1996
1997 #ifdef CONFIG_IWLWIFI_DEBUG
1998         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1999                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2000                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2001 #else
2002         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2003                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2004 #endif
2005         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2006                 size);
2007
2008 #ifdef CONFIG_IWLWIFI_DEBUG
2009         if (display) {
2010                 if (full_log)
2011                         bufsz = capacity * 48;
2012                 else
2013                         bufsz = size * 48;
2014                 *buf = kmalloc(bufsz, GFP_KERNEL);
2015                 if (!*buf)
2016                         return pos;
2017         }
2018         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2019                 /*
2020                  * if uCode has wrapped back to top of log,
2021                  * start at the oldest entry,
2022                  * i.e the next one that uCode would fill.
2023                  */
2024                 if (num_wraps)
2025                         pos = iwl_print_event_log(priv, next_entry,
2026                                                 capacity - next_entry, mode,
2027                                                 pos, buf, bufsz);
2028                 /* (then/else) start at top of log */
2029                 pos = iwl_print_event_log(priv, 0,
2030                                           next_entry, mode, pos, buf, bufsz);
2031         } else
2032                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2033                                                 next_entry, size, mode,
2034                                                 pos, buf, bufsz);
2035 #else
2036         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2037                                         next_entry, size, mode,
2038                                         pos, buf, bufsz);
2039 #endif
2040         return pos;
2041 }
2042
2043 /**
2044  * iwl_alive_start - called after REPLY_ALIVE notification received
2045  *                   from protocol/runtime uCode (initialization uCode's
2046  *                   Alive gets handled by iwl_init_alive_start()).
2047  */
2048 static void iwl_alive_start(struct iwl_priv *priv)
2049 {
2050         int ret = 0;
2051
2052         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2053
2054         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2055                 /* We had an error bringing up the hardware, so take it
2056                  * all the way back down so we can try again */
2057                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2058                 goto restart;
2059         }
2060
2061         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2062          * This is a paranoid check, because we would not have gotten the
2063          * "runtime" alive if code weren't properly loaded.  */
2064         if (iwl_verify_ucode(priv)) {
2065                 /* Runtime instruction load was bad;
2066                  * take it all the way back down so we can try again */
2067                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2068                 goto restart;
2069         }
2070
2071         iwl_clear_stations_table(priv);
2072         ret = priv->cfg->ops->lib->alive_notify(priv);
2073         if (ret) {
2074                 IWL_WARN(priv,
2075                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
2076                 goto restart;
2077         }
2078
2079         /* After the ALIVE response, we can send host commands to the uCode */
2080         set_bit(STATUS_ALIVE, &priv->status);
2081
2082         if (iwl_is_rfkill(priv))
2083                 return;
2084
2085         ieee80211_wake_queues(priv->hw);
2086
2087         priv->active_rate = priv->rates_mask;
2088         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2089
2090         /* Configure Tx antenna selection based on H/W config */
2091         if (priv->cfg->ops->hcmd->set_tx_ant)
2092                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2093
2094         if (iwl_is_associated(priv)) {
2095                 struct iwl_rxon_cmd *active_rxon =
2096                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
2097                 /* apply any changes in staging */
2098                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2099                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2100         } else {
2101                 /* Initialize our rx_config data */
2102                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2103
2104                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2105                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2106
2107                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2108         }
2109
2110         /* Configure Bluetooth device coexistence support */
2111         iwl_send_bt_config(priv);
2112
2113         iwl_reset_run_time_calib(priv);
2114
2115         /* Configure the adapter for unassociated operation */
2116         iwlcore_commit_rxon(priv);
2117
2118         /* At this point, the NIC is initialized and operational */
2119         iwl_rf_kill_ct_config(priv);
2120
2121         iwl_leds_init(priv);
2122
2123         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2124         set_bit(STATUS_READY, &priv->status);
2125         wake_up_interruptible(&priv->wait_command_queue);
2126
2127         iwl_power_update_mode(priv, true);
2128
2129         /* reassociate for ADHOC mode */
2130         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2131                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2132                                                                 priv->vif);
2133                 if (beacon)
2134                         iwl_mac_beacon_update(priv->hw, beacon);
2135         }
2136
2137
2138         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2139                 iwl_set_mode(priv, priv->iw_mode);
2140
2141         return;
2142
2143  restart:
2144         queue_work(priv->workqueue, &priv->restart);
2145 }
2146
2147 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2148
2149 static void __iwl_down(struct iwl_priv *priv)
2150 {
2151         unsigned long flags;
2152         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2153
2154         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2155
2156         if (!exit_pending)
2157                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2158
2159         iwl_clear_stations_table(priv);
2160
2161         /* Unblock any waiting calls */
2162         wake_up_interruptible_all(&priv->wait_command_queue);
2163
2164         /* Wipe out the EXIT_PENDING status bit if we are not actually
2165          * exiting the module */
2166         if (!exit_pending)
2167                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2168
2169         /* stop and reset the on-board processor */
2170         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2171
2172         /* tell the device to stop sending interrupts */
2173         spin_lock_irqsave(&priv->lock, flags);
2174         iwl_disable_interrupts(priv);
2175         spin_unlock_irqrestore(&priv->lock, flags);
2176         iwl_synchronize_irq(priv);
2177
2178         if (priv->mac80211_registered)
2179                 ieee80211_stop_queues(priv->hw);
2180
2181         /* If we have not previously called iwl_init() then
2182          * clear all bits but the RF Kill bit and return */
2183         if (!iwl_is_init(priv)) {
2184                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2185                                         STATUS_RF_KILL_HW |
2186                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2187                                         STATUS_GEO_CONFIGURED |
2188                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2189                                         STATUS_EXIT_PENDING;
2190                 goto exit;
2191         }
2192
2193         /* ...otherwise clear out all the status bits but the RF Kill
2194          * bit and continue taking the NIC down. */
2195         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2196                                 STATUS_RF_KILL_HW |
2197                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2198                                 STATUS_GEO_CONFIGURED |
2199                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2200                                 STATUS_FW_ERROR |
2201                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2202                                 STATUS_EXIT_PENDING;
2203
2204         /* device going down, Stop using ICT table */
2205         iwl_disable_ict(priv);
2206
2207         iwl_txq_ctx_stop(priv);
2208         iwl_rxq_stop(priv);
2209
2210         /* Power-down device's busmaster DMA clocks */
2211         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2212         udelay(5);
2213
2214         /* Make sure (redundant) we've released our request to stay awake */
2215         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2216
2217         /* Stop the device, and put it in low power state */
2218         priv->cfg->ops->lib->apm_ops.stop(priv);
2219
2220  exit:
2221         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2222
2223         if (priv->ibss_beacon)
2224                 dev_kfree_skb(priv->ibss_beacon);
2225         priv->ibss_beacon = NULL;
2226
2227         /* clear out any free frames */
2228         iwl_clear_free_frames(priv);
2229 }
2230
2231 static void iwl_down(struct iwl_priv *priv)
2232 {
2233         mutex_lock(&priv->mutex);
2234         __iwl_down(priv);
2235         mutex_unlock(&priv->mutex);
2236
2237         iwl_cancel_deferred_work(priv);
2238 }
2239
2240 #define HW_READY_TIMEOUT (50)
2241
2242 static int iwl_set_hw_ready(struct iwl_priv *priv)
2243 {
2244         int ret = 0;
2245
2246         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2247                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2248
2249         /* See if we got it */
2250         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2251                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2252                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2253                                 HW_READY_TIMEOUT);
2254         if (ret != -ETIMEDOUT)
2255                 priv->hw_ready = true;
2256         else
2257                 priv->hw_ready = false;
2258
2259         IWL_DEBUG_INFO(priv, "hardware %s\n",
2260                       (priv->hw_ready == 1) ? "ready" : "not ready");
2261         return ret;
2262 }
2263
2264 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2265 {
2266         int ret = 0;
2267
2268         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2269
2270         ret = iwl_set_hw_ready(priv);
2271         if (priv->hw_ready)
2272                 return ret;
2273
2274         /* If HW is not ready, prepare the conditions to check again */
2275         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2276                         CSR_HW_IF_CONFIG_REG_PREPARE);
2277
2278         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2279                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2280                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2281
2282         /* HW should be ready by now, check again. */
2283         if (ret != -ETIMEDOUT)
2284                 iwl_set_hw_ready(priv);
2285
2286         return ret;
2287 }
2288
2289 #define MAX_HW_RESTARTS 5
2290
2291 static int __iwl_up(struct iwl_priv *priv)
2292 {
2293         int i;
2294         int ret;
2295
2296         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2297                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2298                 return -EIO;
2299         }
2300
2301         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2302                 IWL_ERR(priv, "ucode not available for device bringup\n");
2303                 return -EIO;
2304         }
2305
2306         iwl_prepare_card_hw(priv);
2307
2308         if (!priv->hw_ready) {
2309                 IWL_WARN(priv, "Exit HW not ready\n");
2310                 return -EIO;
2311         }
2312
2313         /* If platform's RF_KILL switch is NOT set to KILL */
2314         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2315                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2316         else
2317                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2318
2319         if (iwl_is_rfkill(priv)) {
2320                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2321
2322                 iwl_enable_interrupts(priv);
2323                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2324                 return 0;
2325         }
2326
2327         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2328
2329         ret = iwl_hw_nic_init(priv);
2330         if (ret) {
2331                 IWL_ERR(priv, "Unable to init nic\n");
2332                 return ret;
2333         }
2334
2335         /* make sure rfkill handshake bits are cleared */
2336         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2337         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2338                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2339
2340         /* clear (again), then enable host interrupts */
2341         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2342         iwl_enable_interrupts(priv);
2343
2344         /* really make sure rfkill handshake bits are cleared */
2345         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2346         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2347
2348         /* Copy original ucode data image from disk into backup cache.
2349          * This will be used to initialize the on-board processor's
2350          * data SRAM for a clean start when the runtime program first loads. */
2351         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2352                priv->ucode_data.len);
2353
2354         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2355
2356                 iwl_clear_stations_table(priv);
2357
2358                 /* load bootstrap state machine,
2359                  * load bootstrap program into processor's memory,
2360                  * prepare to load the "initialize" uCode */
2361                 ret = priv->cfg->ops->lib->load_ucode(priv);
2362
2363                 if (ret) {
2364                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2365                                 ret);
2366                         continue;
2367                 }
2368
2369                 /* start card; "initialize" will load runtime ucode */
2370                 iwl_nic_start(priv);
2371
2372                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2373
2374                 return 0;
2375         }
2376
2377         set_bit(STATUS_EXIT_PENDING, &priv->status);
2378         __iwl_down(priv);
2379         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2380
2381         /* tried to restart and config the device for as long as our
2382          * patience could withstand */
2383         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2384         return -EIO;
2385 }
2386
2387
2388 /*****************************************************************************
2389  *
2390  * Workqueue callbacks
2391  *
2392  *****************************************************************************/
2393
2394 static void iwl_bg_init_alive_start(struct work_struct *data)
2395 {
2396         struct iwl_priv *priv =
2397             container_of(data, struct iwl_priv, init_alive_start.work);
2398
2399         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2400                 return;
2401
2402         mutex_lock(&priv->mutex);
2403         priv->cfg->ops->lib->init_alive_start(priv);
2404         mutex_unlock(&priv->mutex);
2405 }
2406
2407 static void iwl_bg_alive_start(struct work_struct *data)
2408 {
2409         struct iwl_priv *priv =
2410             container_of(data, struct iwl_priv, alive_start.work);
2411
2412         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2413                 return;
2414
2415         /* enable dram interrupt */
2416         iwl_reset_ict(priv);
2417
2418         mutex_lock(&priv->mutex);
2419         iwl_alive_start(priv);
2420         mutex_unlock(&priv->mutex);
2421 }
2422
2423 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2424 {
2425         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2426                         run_time_calib_work);
2427
2428         mutex_lock(&priv->mutex);
2429
2430         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2431             test_bit(STATUS_SCANNING, &priv->status)) {
2432                 mutex_unlock(&priv->mutex);
2433                 return;
2434         }
2435
2436         if (priv->start_calib) {
2437                 iwl_chain_noise_calibration(priv, &priv->statistics);
2438
2439                 iwl_sensitivity_calibration(priv, &priv->statistics);
2440         }
2441
2442         mutex_unlock(&priv->mutex);
2443         return;
2444 }
2445
2446 static void iwl_bg_up(struct work_struct *data)
2447 {
2448         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2449
2450         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2451                 return;
2452
2453         mutex_lock(&priv->mutex);
2454         __iwl_up(priv);
2455         mutex_unlock(&priv->mutex);
2456 }
2457
2458 static void iwl_bg_restart(struct work_struct *data)
2459 {
2460         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2461
2462         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2463                 return;
2464
2465         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2466                 mutex_lock(&priv->mutex);
2467                 priv->vif = NULL;
2468                 priv->is_open = 0;
2469                 mutex_unlock(&priv->mutex);
2470                 iwl_down(priv);
2471                 ieee80211_restart_hw(priv->hw);
2472         } else {
2473                 iwl_down(priv);
2474                 queue_work(priv->workqueue, &priv->up);
2475         }
2476 }
2477
2478 static void iwl_bg_rx_replenish(struct work_struct *data)
2479 {
2480         struct iwl_priv *priv =
2481             container_of(data, struct iwl_priv, rx_replenish);
2482
2483         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2484                 return;
2485
2486         mutex_lock(&priv->mutex);
2487         iwl_rx_replenish(priv);
2488         mutex_unlock(&priv->mutex);
2489 }
2490
2491 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2492
2493 void iwl_post_associate(struct iwl_priv *priv)
2494 {
2495         struct ieee80211_conf *conf = NULL;
2496         int ret = 0;
2497         unsigned long flags;
2498
2499         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2500                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2501                 return;
2502         }
2503
2504         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2505                         priv->assoc_id, priv->active_rxon.bssid_addr);
2506
2507
2508         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2509                 return;
2510
2511
2512         if (!priv->vif || !priv->is_open)
2513                 return;
2514
2515         iwl_scan_cancel_timeout(priv, 200);
2516
2517         conf = ieee80211_get_hw_conf(priv->hw);
2518
2519         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2520         iwlcore_commit_rxon(priv);
2521
2522         iwl_setup_rxon_timing(priv);
2523         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2524                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2525         if (ret)
2526                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2527                             "Attempting to continue.\n");
2528
2529         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2530
2531         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2532
2533         if (priv->cfg->ops->hcmd->set_rxon_chain)
2534                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2535
2536         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2537
2538         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2539                         priv->assoc_id, priv->beacon_int);
2540
2541         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2542                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2543         else
2544                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2545
2546         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2547                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2548                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2549                 else
2550                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2551
2552                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2553                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2554
2555         }
2556
2557         iwlcore_commit_rxon(priv);
2558
2559         switch (priv->iw_mode) {
2560         case NL80211_IFTYPE_STATION:
2561                 break;
2562
2563         case NL80211_IFTYPE_ADHOC:
2564
2565                 /* assume default assoc id */
2566                 priv->assoc_id = 1;
2567
2568                 iwl_rxon_add_station(priv, priv->bssid, 0);
2569                 iwl_send_beacon_cmd(priv);
2570
2571                 break;
2572
2573         default:
2574                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2575                           __func__, priv->iw_mode);
2576                 break;
2577         }
2578
2579         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2580                 priv->assoc_station_added = 1;
2581
2582         spin_lock_irqsave(&priv->lock, flags);
2583         iwl_activate_qos(priv, 0);
2584         spin_unlock_irqrestore(&priv->lock, flags);
2585
2586         /* the chain noise calibration will enabled PM upon completion
2587          * If chain noise has already been run, then we need to enable
2588          * power management here */
2589         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2590                 iwl_power_update_mode(priv, false);
2591
2592         /* Enable Rx differential gain and sensitivity calibrations */
2593         iwl_chain_noise_reset(priv);
2594         priv->start_calib = 1;
2595
2596 }
2597
2598 /*****************************************************************************
2599  *
2600  * mac80211 entry point functions
2601  *
2602  *****************************************************************************/
2603
2604 #define UCODE_READY_TIMEOUT     (4 * HZ)
2605
2606 /*
2607  * Not a mac80211 entry point function, but it fits in with all the
2608  * other mac80211 functions grouped here.
2609  */
2610 static int iwl_setup_mac(struct iwl_priv *priv)
2611 {
2612         int ret;
2613         struct ieee80211_hw *hw = priv->hw;
2614         hw->rate_control_algorithm = "iwl-agn-rs";
2615
2616         /* Tell mac80211 our characteristics */
2617         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2618                     IEEE80211_HW_NOISE_DBM |
2619                     IEEE80211_HW_AMPDU_AGGREGATION |
2620                     IEEE80211_HW_SPECTRUM_MGMT;
2621
2622         if (!priv->cfg->broken_powersave)
2623                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2624                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2625
2626         if (priv->cfg->sku & IWL_SKU_N)
2627                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2628                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2629
2630         hw->sta_data_size = sizeof(struct iwl_station_priv);
2631         hw->wiphy->interface_modes =
2632                 BIT(NL80211_IFTYPE_STATION) |
2633                 BIT(NL80211_IFTYPE_ADHOC);
2634
2635         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
2636                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
2637
2638         /*
2639          * For now, disable PS by default because it affects
2640          * RX performance significantly.
2641          */
2642         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2643
2644         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2645         /* we create the 802.11 header and a zero-length SSID element */
2646         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2647
2648         /* Default value; 4 EDCA QOS priorities */
2649         hw->queues = 4;
2650
2651         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2652
2653         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2654                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2655                         &priv->bands[IEEE80211_BAND_2GHZ];
2656         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2657                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2658                         &priv->bands[IEEE80211_BAND_5GHZ];
2659
2660         ret = ieee80211_register_hw(priv->hw);
2661         if (ret) {
2662                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2663                 return ret;
2664         }
2665         priv->mac80211_registered = 1;
2666
2667         return 0;
2668 }
2669
2670
2671 static int iwl_mac_start(struct ieee80211_hw *hw)
2672 {
2673         struct iwl_priv *priv = hw->priv;
2674         int ret;
2675
2676         IWL_DEBUG_MAC80211(priv, "enter\n");
2677
2678         /* we should be verifying the device is ready to be opened */
2679         mutex_lock(&priv->mutex);
2680
2681         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2682          * ucode filename and max sizes are card-specific. */
2683
2684         if (!priv->ucode_code.len) {
2685                 ret = iwl_read_ucode(priv);
2686                 if (ret) {
2687                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2688                         mutex_unlock(&priv->mutex);
2689                         return ret;
2690                 }
2691         }
2692
2693         ret = __iwl_up(priv);
2694
2695         mutex_unlock(&priv->mutex);
2696
2697         if (ret)
2698                 return ret;
2699
2700         if (iwl_is_rfkill(priv))
2701                 goto out;
2702
2703         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2704
2705         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2706          * mac80211 will not be run successfully. */
2707         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2708                         test_bit(STATUS_READY, &priv->status),
2709                         UCODE_READY_TIMEOUT);
2710         if (!ret) {
2711                 if (!test_bit(STATUS_READY, &priv->status)) {
2712                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2713                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2714                         return -ETIMEDOUT;
2715                 }
2716         }
2717
2718         iwl_led_start(priv);
2719
2720 out:
2721         priv->is_open = 1;
2722         IWL_DEBUG_MAC80211(priv, "leave\n");
2723         return 0;
2724 }
2725
2726 static void iwl_mac_stop(struct ieee80211_hw *hw)
2727 {
2728         struct iwl_priv *priv = hw->priv;
2729
2730         IWL_DEBUG_MAC80211(priv, "enter\n");
2731
2732         if (!priv->is_open)
2733                 return;
2734
2735         priv->is_open = 0;
2736
2737         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2738                 /* stop mac, cancel any scan request and clear
2739                  * RXON_FILTER_ASSOC_MSK BIT
2740                  */
2741                 mutex_lock(&priv->mutex);
2742                 iwl_scan_cancel_timeout(priv, 100);
2743                 mutex_unlock(&priv->mutex);
2744         }
2745
2746         iwl_down(priv);
2747
2748         flush_workqueue(priv->workqueue);
2749
2750         /* enable interrupts again in order to receive rfkill changes */
2751         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2752         iwl_enable_interrupts(priv);
2753
2754         IWL_DEBUG_MAC80211(priv, "leave\n");
2755 }
2756
2757 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2758 {
2759         struct iwl_priv *priv = hw->priv;
2760
2761         IWL_DEBUG_MACDUMP(priv, "enter\n");
2762
2763         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2764                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2765
2766         if (iwl_tx_skb(priv, skb))
2767                 dev_kfree_skb_any(skb);
2768
2769         IWL_DEBUG_MACDUMP(priv, "leave\n");
2770         return NETDEV_TX_OK;
2771 }
2772
2773 void iwl_config_ap(struct iwl_priv *priv)
2774 {
2775         int ret = 0;
2776         unsigned long flags;
2777
2778         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2779                 return;
2780
2781         /* The following should be done only at AP bring up */
2782         if (!iwl_is_associated(priv)) {
2783
2784                 /* RXON - unassoc (to set timing command) */
2785                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2786                 iwlcore_commit_rxon(priv);
2787
2788                 /* RXON Timing */
2789                 iwl_setup_rxon_timing(priv);
2790                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2791                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2792                 if (ret)
2793                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2794                                         "Attempting to continue.\n");
2795
2796                 /* AP has all antennas */
2797                 priv->chain_noise_data.active_chains =
2798                         priv->hw_params.valid_rx_ant;
2799                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2800                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2801                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2802
2803                 /* FIXME: what should be the assoc_id for AP? */
2804                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2805                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2806                         priv->staging_rxon.flags |=
2807                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2808                 else
2809                         priv->staging_rxon.flags &=
2810                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2811
2812                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2813                         if (priv->assoc_capability &
2814                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2815                                 priv->staging_rxon.flags |=
2816                                         RXON_FLG_SHORT_SLOT_MSK;
2817                         else
2818                                 priv->staging_rxon.flags &=
2819                                         ~RXON_FLG_SHORT_SLOT_MSK;
2820
2821                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2822                                 priv->staging_rxon.flags &=
2823                                         ~RXON_FLG_SHORT_SLOT_MSK;
2824                 }
2825                 /* restore RXON assoc */
2826                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2827                 iwlcore_commit_rxon(priv);
2828                 iwl_reset_qos(priv);
2829                 spin_lock_irqsave(&priv->lock, flags);
2830                 iwl_activate_qos(priv, 1);
2831                 spin_unlock_irqrestore(&priv->lock, flags);
2832                 iwl_add_bcast_station(priv);
2833         }
2834         iwl_send_beacon_cmd(priv);
2835
2836         /* FIXME - we need to add code here to detect a totally new
2837          * configuration, reset the AP, unassoc, rxon timing, assoc,
2838          * clear sta table, add BCAST sta... */
2839 }
2840
2841 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2842                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2843                         u32 iv32, u16 *phase1key)
2844 {
2845
2846         struct iwl_priv *priv = hw->priv;
2847         IWL_DEBUG_MAC80211(priv, "enter\n");
2848
2849         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2850
2851         IWL_DEBUG_MAC80211(priv, "leave\n");
2852 }
2853
2854 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2855                            struct ieee80211_vif *vif,
2856                            struct ieee80211_sta *sta,
2857                            struct ieee80211_key_conf *key)
2858 {
2859         struct iwl_priv *priv = hw->priv;
2860         const u8 *addr;
2861         int ret;
2862         u8 sta_id;
2863         bool is_default_wep_key = false;
2864
2865         IWL_DEBUG_MAC80211(priv, "enter\n");
2866
2867         if (priv->cfg->mod_params->sw_crypto) {
2868                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2869                 return -EOPNOTSUPP;
2870         }
2871         addr = sta ? sta->addr : iwl_bcast_addr;
2872         sta_id = iwl_find_station(priv, addr);
2873         if (sta_id == IWL_INVALID_STATION) {
2874                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2875                                    addr);
2876                 return -EINVAL;
2877
2878         }
2879
2880         mutex_lock(&priv->mutex);
2881         iwl_scan_cancel_timeout(priv, 100);
2882         mutex_unlock(&priv->mutex);
2883
2884         /* If we are getting WEP group key and we didn't receive any key mapping
2885          * so far, we are in legacy wep mode (group key only), otherwise we are
2886          * in 1X mode.
2887          * In legacy wep mode, we use another host command to the uCode */
2888         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2889                 priv->iw_mode != NL80211_IFTYPE_AP) {
2890                 if (cmd == SET_KEY)
2891                         is_default_wep_key = !priv->key_mapping_key;
2892                 else
2893                         is_default_wep_key =
2894                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2895         }
2896
2897         switch (cmd) {
2898         case SET_KEY:
2899                 if (is_default_wep_key)
2900                         ret = iwl_set_default_wep_key(priv, key);
2901                 else
2902                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2903
2904                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2905                 break;
2906         case DISABLE_KEY:
2907                 if (is_default_wep_key)
2908                         ret = iwl_remove_default_wep_key(priv, key);
2909                 else
2910                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2911
2912                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2913                 break;
2914         default:
2915                 ret = -EINVAL;
2916         }
2917
2918         IWL_DEBUG_MAC80211(priv, "leave\n");
2919
2920         return ret;
2921 }
2922
2923 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2924                                 struct ieee80211_vif *vif,
2925                              enum ieee80211_ampdu_mlme_action action,
2926                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2927 {
2928         struct iwl_priv *priv = hw->priv;
2929         int ret;
2930
2931         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2932                      sta->addr, tid);
2933
2934         if (!(priv->cfg->sku & IWL_SKU_N))
2935                 return -EACCES;
2936
2937         switch (action) {
2938         case IEEE80211_AMPDU_RX_START:
2939                 IWL_DEBUG_HT(priv, "start Rx\n");
2940                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2941         case IEEE80211_AMPDU_RX_STOP:
2942                 IWL_DEBUG_HT(priv, "stop Rx\n");
2943                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2944                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2945                         return 0;
2946                 else
2947                         return ret;
2948         case IEEE80211_AMPDU_TX_START:
2949                 IWL_DEBUG_HT(priv, "start Tx\n");
2950                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2951         case IEEE80211_AMPDU_TX_STOP:
2952                 IWL_DEBUG_HT(priv, "stop Tx\n");
2953                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2954                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2955                         return 0;
2956                 else
2957                         return ret;
2958         default:
2959                 IWL_DEBUG_HT(priv, "unknown\n");
2960                 return -EINVAL;
2961                 break;
2962         }
2963         return 0;
2964 }
2965
2966 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2967                              struct ieee80211_low_level_stats *stats)
2968 {
2969         struct iwl_priv *priv = hw->priv;
2970
2971         priv = hw->priv;
2972         IWL_DEBUG_MAC80211(priv, "enter\n");
2973         IWL_DEBUG_MAC80211(priv, "leave\n");
2974
2975         return 0;
2976 }
2977
2978 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2979                                struct ieee80211_vif *vif,
2980                                enum sta_notify_cmd cmd,
2981                                struct ieee80211_sta *sta)
2982 {
2983         struct iwl_priv *priv = hw->priv;
2984         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2985         int sta_id;
2986
2987         /*
2988          * TODO: We really should use this callback to
2989          *       actually maintain the station table in
2990          *       the device.
2991          */
2992
2993         switch (cmd) {
2994         case STA_NOTIFY_ADD:
2995                 atomic_set(&sta_priv->pending_frames, 0);
2996                 if (vif->type == NL80211_IFTYPE_AP)
2997                         sta_priv->client = true;
2998                 break;
2999         case STA_NOTIFY_SLEEP:
3000                 WARN_ON(!sta_priv->client);
3001                 sta_priv->asleep = true;
3002                 if (atomic_read(&sta_priv->pending_frames) > 0)
3003                         ieee80211_sta_block_awake(hw, sta, true);
3004                 break;
3005         case STA_NOTIFY_AWAKE:
3006                 WARN_ON(!sta_priv->client);
3007                 sta_priv->asleep = false;
3008                 sta_id = iwl_find_station(priv, sta->addr);
3009                 if (sta_id != IWL_INVALID_STATION)
3010                         iwl_sta_modify_ps_wake(priv, sta_id);
3011                 break;
3012         default:
3013                 break;
3014         }
3015 }
3016
3017 /*****************************************************************************
3018  *
3019  * sysfs attributes
3020  *
3021  *****************************************************************************/
3022
3023 #ifdef CONFIG_IWLWIFI_DEBUG
3024
3025 /*
3026  * The following adds a new attribute to the sysfs representation
3027  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3028  * used for controlling the debug level.
3029  *
3030  * See the level definitions in iwl for details.
3031  *
3032  * The debug_level being managed using sysfs below is a per device debug
3033  * level that is used instead of the global debug level if it (the per
3034  * device debug level) is set.
3035  */
3036 static ssize_t show_debug_level(struct device *d,
3037                                 struct device_attribute *attr, char *buf)
3038 {
3039         struct iwl_priv *priv = dev_get_drvdata(d);
3040         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3041 }
3042 static ssize_t store_debug_level(struct device *d,
3043                                 struct device_attribute *attr,
3044                                  const char *buf, size_t count)
3045 {
3046         struct iwl_priv *priv = dev_get_drvdata(d);
3047         unsigned long val;
3048         int ret;
3049
3050         ret = strict_strtoul(buf, 0, &val);
3051         if (ret)
3052                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3053         else {
3054                 priv->debug_level = val;
3055                 if (iwl_alloc_traffic_mem(priv))
3056                         IWL_ERR(priv,
3057                                 "Not enough memory to generate traffic log\n");
3058         }
3059         return strnlen(buf, count);
3060 }
3061
3062 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3063                         show_debug_level, store_debug_level);
3064
3065
3066 #endif /* CONFIG_IWLWIFI_DEBUG */
3067
3068
3069 static ssize_t show_temperature(struct device *d,
3070                                 struct device_attribute *attr, char *buf)
3071 {
3072         struct iwl_priv *priv = dev_get_drvdata(d);
3073
3074         if (!iwl_is_alive(priv))
3075                 return -EAGAIN;
3076
3077         return sprintf(buf, "%d\n", priv->temperature);
3078 }
3079
3080 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3081
3082 static ssize_t show_tx_power(struct device *d,
3083                              struct device_attribute *attr, char *buf)
3084 {
3085         struct iwl_priv *priv = dev_get_drvdata(d);
3086
3087         if (!iwl_is_ready_rf(priv))
3088                 return sprintf(buf, "off\n");
3089         else
3090                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3091 }
3092
3093 static ssize_t store_tx_power(struct device *d,
3094                               struct device_attribute *attr,
3095                               const char *buf, size_t count)
3096 {
3097         struct iwl_priv *priv = dev_get_drvdata(d);
3098         unsigned long val;
3099         int ret;
3100
3101         ret = strict_strtoul(buf, 10, &val);
3102         if (ret)
3103                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3104         else {
3105                 ret = iwl_set_tx_power(priv, val, false);
3106                 if (ret)
3107                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
3108                                 ret);
3109                 else
3110                         ret = count;
3111         }
3112         return ret;
3113 }
3114
3115 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3116
3117 static ssize_t show_flags(struct device *d,
3118                           struct device_attribute *attr, char *buf)
3119 {
3120         struct iwl_priv *priv = dev_get_drvdata(d);
3121
3122         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3123 }
3124
3125 static ssize_t store_flags(struct device *d,
3126                            struct device_attribute *attr,
3127                            const char *buf, size_t count)
3128 {
3129         struct iwl_priv *priv = dev_get_drvdata(d);
3130         unsigned long val;
3131         u32 flags;
3132         int ret = strict_strtoul(buf, 0, &val);
3133         if (ret)
3134                 return ret;
3135         flags = (u32)val;
3136
3137         mutex_lock(&priv->mutex);
3138         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3139                 /* Cancel any currently running scans... */
3140                 if (iwl_scan_cancel_timeout(priv, 100))
3141                         IWL_WARN(priv, "Could not cancel scan.\n");
3142                 else {
3143                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3144                         priv->staging_rxon.flags = cpu_to_le32(flags);
3145                         iwlcore_commit_rxon(priv);
3146                 }
3147         }
3148         mutex_unlock(&priv->mutex);
3149
3150         return count;
3151 }
3152
3153 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3154
3155 static ssize_t show_filter_flags(struct device *d,
3156                                  struct device_attribute *attr, char *buf)
3157 {
3158         struct iwl_priv *priv = dev_get_drvdata(d);
3159
3160         return sprintf(buf, "0x%04X\n",
3161                 le32_to_cpu(priv->active_rxon.filter_flags));
3162 }
3163
3164 static ssize_t store_filter_flags(struct device *d,
3165                                   struct device_attribute *attr,
3166                                   const char *buf, size_t count)
3167 {
3168         struct iwl_priv *priv = dev_get_drvdata(d);
3169         unsigned long val;
3170         u32 filter_flags;
3171         int ret = strict_strtoul(buf, 0, &val);
3172         if (ret)
3173                 return ret;
3174         filter_flags = (u32)val;
3175
3176         mutex_lock(&priv->mutex);
3177         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3178                 /* Cancel any currently running scans... */
3179                 if (iwl_scan_cancel_timeout(priv, 100))
3180                         IWL_WARN(priv, "Could not cancel scan.\n");
3181                 else {
3182                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3183                                        "0x%04X\n", filter_flags);
3184                         priv->staging_rxon.filter_flags =
3185                                 cpu_to_le32(filter_flags);
3186                         iwlcore_commit_rxon(priv);
3187                 }
3188         }
3189         mutex_unlock(&priv->mutex);
3190
3191         return count;
3192 }
3193
3194 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3195                    store_filter_flags);
3196
3197
3198 static ssize_t show_statistics(struct device *d,
3199                                struct device_attribute *attr, char *buf)
3200 {
3201         struct iwl_priv *priv = dev_get_drvdata(d);
3202         u32 size = sizeof(struct iwl_notif_statistics);
3203         u32 len = 0, ofs = 0;
3204         u8 *data = (u8 *)&priv->statistics;
3205         int rc = 0;
3206
3207         if (!iwl_is_alive(priv))
3208                 return -EAGAIN;
3209
3210         mutex_lock(&priv->mutex);
3211         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3212         mutex_unlock(&priv->mutex);
3213
3214         if (rc) {
3215                 len = sprintf(buf,
3216                               "Error sending statistics request: 0x%08X\n", rc);
3217                 return len;
3218         }
3219
3220         while (size && (PAGE_SIZE - len)) {
3221                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3222                                    PAGE_SIZE - len, 1);
3223                 len = strlen(buf);
3224                 if (PAGE_SIZE - len)
3225                         buf[len++] = '\n';
3226
3227                 ofs += 16;
3228                 size -= min(size, 16U);
3229         }
3230
3231         return len;
3232 }
3233
3234 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3235
3236 static ssize_t show_rts_ht_protection(struct device *d,
3237                              struct device_attribute *attr, char *buf)
3238 {
3239         struct iwl_priv *priv = dev_get_drvdata(d);
3240
3241         return sprintf(buf, "%s\n",
3242                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3243 }
3244
3245 static ssize_t store_rts_ht_protection(struct device *d,
3246                               struct device_attribute *attr,
3247                               const char *buf, size_t count)
3248 {
3249         struct iwl_priv *priv = dev_get_drvdata(d);
3250         unsigned long val;
3251         int ret;
3252
3253         ret = strict_strtoul(buf, 10, &val);
3254         if (ret)
3255                 IWL_INFO(priv, "Input is not in decimal form.\n");
3256         else {
3257                 if (!iwl_is_associated(priv))
3258                         priv->cfg->use_rts_for_ht = val ? true : false;
3259                 else
3260                         IWL_ERR(priv, "Sta associated with AP - "
3261                                 "Change protection mechanism is not allowed\n");
3262                 ret = count;
3263         }
3264         return ret;
3265 }
3266
3267 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3268                         show_rts_ht_protection, store_rts_ht_protection);
3269
3270
3271 /*****************************************************************************
3272  *
3273  * driver setup and teardown
3274  *
3275  *****************************************************************************/
3276
3277 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3278 {
3279         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3280
3281         init_waitqueue_head(&priv->wait_command_queue);
3282
3283         INIT_WORK(&priv->up, iwl_bg_up);
3284         INIT_WORK(&priv->restart, iwl_bg_restart);
3285         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3286         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3287         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3288         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3289         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3290
3291         iwl_setup_scan_deferred_work(priv);
3292
3293         if (priv->cfg->ops->lib->setup_deferred_work)
3294                 priv->cfg->ops->lib->setup_deferred_work(priv);
3295
3296         init_timer(&priv->statistics_periodic);
3297         priv->statistics_periodic.data = (unsigned long)priv;
3298         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3299
3300         init_timer(&priv->ucode_trace);
3301         priv->ucode_trace.data = (unsigned long)priv;
3302         priv->ucode_trace.function = iwl_bg_ucode_trace;
3303
3304         if (!priv->cfg->use_isr_legacy)
3305                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3306                         iwl_irq_tasklet, (unsigned long)priv);
3307         else
3308                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3309                         iwl_irq_tasklet_legacy, (unsigned long)priv);
3310 }
3311
3312 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3313 {
3314         if (priv->cfg->ops->lib->cancel_deferred_work)
3315                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3316
3317         cancel_delayed_work_sync(&priv->init_alive_start);
3318         cancel_delayed_work(&priv->scan_check);
3319         cancel_delayed_work(&priv->alive_start);
3320         cancel_work_sync(&priv->beacon_update);
3321         del_timer_sync(&priv->statistics_periodic);
3322         del_timer_sync(&priv->ucode_trace);
3323 }
3324
3325 static void iwl_init_hw_rates(struct iwl_priv *priv,
3326                               struct ieee80211_rate *rates)
3327 {
3328         int i;
3329
3330         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3331                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3332                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3333                 rates[i].hw_value_short = i;
3334                 rates[i].flags = 0;
3335                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3336                         /*
3337                          * If CCK != 1M then set short preamble rate flag.
3338                          */
3339                         rates[i].flags |=
3340                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3341                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3342                 }
3343         }
3344 }
3345
3346 static int iwl_init_drv(struct iwl_priv *priv)
3347 {
3348         int ret;
3349
3350         priv->ibss_beacon = NULL;
3351
3352         spin_lock_init(&priv->sta_lock);
3353         spin_lock_init(&priv->hcmd_lock);
3354
3355         INIT_LIST_HEAD(&priv->free_frames);
3356
3357         mutex_init(&priv->mutex);
3358
3359         /* Clear the driver's (not device's) station table */
3360         iwl_clear_stations_table(priv);
3361
3362         priv->ieee_channels = NULL;
3363         priv->ieee_rates = NULL;
3364         priv->band = IEEE80211_BAND_2GHZ;
3365
3366         priv->iw_mode = NL80211_IFTYPE_STATION;
3367         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3368
3369         /* Choose which receivers/antennas to use */
3370         if (priv->cfg->ops->hcmd->set_rxon_chain)
3371                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3372
3373         iwl_init_scan_params(priv);
3374
3375         iwl_reset_qos(priv);
3376
3377         priv->qos_data.qos_active = 0;
3378         priv->qos_data.qos_cap.val = 0;
3379
3380         priv->rates_mask = IWL_RATES_MASK;
3381         /* Set the tx_power_user_lmt to the lowest power level
3382          * this value will get overwritten by channel max power avg
3383          * from eeprom */
3384         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
3385
3386         ret = iwl_init_channel_map(priv);
3387         if (ret) {
3388                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3389                 goto err;
3390         }
3391
3392         ret = iwlcore_init_geos(priv);
3393         if (ret) {
3394                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3395                 goto err_free_channel_map;
3396         }
3397         iwl_init_hw_rates(priv, priv->ieee_rates);
3398
3399         return 0;
3400
3401 err_free_channel_map:
3402         iwl_free_channel_map(priv);
3403 err:
3404         return ret;
3405 }
3406
3407 static void iwl_uninit_drv(struct iwl_priv *priv)
3408 {
3409         iwl_calib_free_results(priv);
3410         iwlcore_free_geos(priv);
3411         iwl_free_channel_map(priv);
3412         kfree(priv->scan);
3413 }
3414
3415 static struct attribute *iwl_sysfs_entries[] = {
3416         &dev_attr_flags.attr,
3417         &dev_attr_filter_flags.attr,
3418         &dev_attr_statistics.attr,
3419         &dev_attr_temperature.attr,
3420         &dev_attr_tx_power.attr,
3421         &dev_attr_rts_ht_protection.attr,
3422 #ifdef CONFIG_IWLWIFI_DEBUG
3423         &dev_attr_debug_level.attr,
3424 #endif
3425         NULL
3426 };
3427
3428 static struct attribute_group iwl_attribute_group = {
3429         .name = NULL,           /* put in device directory */
3430         .attrs = iwl_sysfs_entries,
3431 };
3432
3433 static struct ieee80211_ops iwl_hw_ops = {
3434         .tx = iwl_mac_tx,
3435         .start = iwl_mac_start,
3436         .stop = iwl_mac_stop,
3437         .add_interface = iwl_mac_add_interface,
3438         .remove_interface = iwl_mac_remove_interface,
3439         .config = iwl_mac_config,
3440         .configure_filter = iwl_configure_filter,
3441         .set_key = iwl_mac_set_key,
3442         .update_tkip_key = iwl_mac_update_tkip_key,
3443         .get_stats = iwl_mac_get_stats,
3444         .get_tx_stats = iwl_mac_get_tx_stats,
3445         .conf_tx = iwl_mac_conf_tx,
3446         .reset_tsf = iwl_mac_reset_tsf,
3447         .bss_info_changed = iwl_bss_info_changed,
3448         .ampdu_action = iwl_mac_ampdu_action,
3449         .hw_scan = iwl_mac_hw_scan,
3450         .sta_notify = iwl_mac_sta_notify,
3451 };
3452
3453 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3454 {
3455         int err = 0;
3456         struct iwl_priv *priv;
3457         struct ieee80211_hw *hw;
3458         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3459         unsigned long flags;
3460         u16 pci_cmd;
3461
3462         /************************
3463          * 1. Allocating HW data
3464          ************************/
3465
3466         /* Disabling hardware scan means that mac80211 will perform scans
3467          * "the hard way", rather than using device's scan. */
3468         if (cfg->mod_params->disable_hw_scan) {
3469                 if (iwl_debug_level & IWL_DL_INFO)
3470                         dev_printk(KERN_DEBUG, &(pdev->dev),
3471                                    "Disabling hw_scan\n");
3472                 iwl_hw_ops.hw_scan = NULL;
3473         }
3474
3475         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3476         if (!hw) {
3477                 err = -ENOMEM;
3478                 goto out;
3479         }
3480         priv = hw->priv;
3481         /* At this point both hw and priv are allocated. */
3482
3483         SET_IEEE80211_DEV(hw, &pdev->dev);
3484
3485         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3486         priv->cfg = cfg;
3487         priv->pci_dev = pdev;
3488         priv->inta_mask = CSR_INI_SET_MASK;
3489
3490 #ifdef CONFIG_IWLWIFI_DEBUG
3491         atomic_set(&priv->restrict_refcnt, 0);
3492 #endif
3493         if (iwl_alloc_traffic_mem(priv))
3494                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3495
3496         /**************************
3497          * 2. Initializing PCI bus
3498          **************************/
3499         if (pci_enable_device(pdev)) {
3500                 err = -ENODEV;
3501                 goto out_ieee80211_free_hw;
3502         }
3503
3504         pci_set_master(pdev);
3505
3506         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3507         if (!err)
3508                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3509         if (err) {
3510                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3511                 if (!err)
3512                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3513                 /* both attempts failed: */
3514                 if (err) {
3515                         IWL_WARN(priv, "No suitable DMA available.\n");
3516                         goto out_pci_disable_device;
3517                 }
3518         }
3519
3520         err = pci_request_regions(pdev, DRV_NAME);
3521         if (err)
3522                 goto out_pci_disable_device;
3523
3524         pci_set_drvdata(pdev, priv);
3525
3526
3527         /***********************
3528          * 3. Read REV register
3529          ***********************/
3530         priv->hw_base = pci_iomap(pdev, 0, 0);
3531         if (!priv->hw_base) {
3532                 err = -ENODEV;
3533                 goto out_pci_release_regions;
3534         }
3535
3536         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3537                 (unsigned long long) pci_resource_len(pdev, 0));
3538         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3539
3540         /* these spin locks will be used in apm_ops.init and EEPROM access
3541          * we should init now
3542          */
3543         spin_lock_init(&priv->reg_lock);
3544         spin_lock_init(&priv->lock);
3545         iwl_hw_detect(priv);
3546         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3547                 priv->cfg->name, priv->hw_rev);
3548
3549         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3550          * PCI Tx retries from interfering with C3 CPU state */
3551         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3552
3553         iwl_prepare_card_hw(priv);
3554         if (!priv->hw_ready) {
3555                 IWL_WARN(priv, "Failed, HW not ready\n");
3556                 goto out_iounmap;
3557         }
3558
3559         /*****************
3560          * 4. Read EEPROM
3561          *****************/
3562         /* Read the EEPROM */
3563         err = iwl_eeprom_init(priv);
3564         if (err) {
3565                 IWL_ERR(priv, "Unable to init EEPROM\n");
3566                 goto out_iounmap;
3567         }
3568         err = iwl_eeprom_check_version(priv);
3569         if (err)
3570                 goto out_free_eeprom;
3571
3572         /* extract MAC Address */
3573         iwl_eeprom_get_mac(priv, priv->mac_addr);
3574         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3575         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3576
3577         /************************
3578          * 5. Setup HW constants
3579          ************************/
3580         if (iwl_set_hw_params(priv)) {
3581                 IWL_ERR(priv, "failed to set hw parameters\n");
3582                 goto out_free_eeprom;
3583         }
3584
3585         /*******************
3586          * 6. Setup priv
3587          *******************/
3588
3589         err = iwl_init_drv(priv);
3590         if (err)
3591                 goto out_free_eeprom;
3592         /* At this point both hw and priv are initialized. */
3593
3594         /********************
3595          * 7. Setup services
3596          ********************/
3597         spin_lock_irqsave(&priv->lock, flags);
3598         iwl_disable_interrupts(priv);
3599         spin_unlock_irqrestore(&priv->lock, flags);
3600
3601         pci_enable_msi(priv->pci_dev);
3602
3603         iwl_alloc_isr_ict(priv);
3604         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3605                           IRQF_SHARED, DRV_NAME, priv);
3606         if (err) {
3607                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3608                 goto out_disable_msi;
3609         }
3610         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3611         if (err) {
3612                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3613                 goto out_free_irq;
3614         }
3615
3616         iwl_setup_deferred_work(priv);
3617         iwl_setup_rx_handlers(priv);
3618
3619         /**********************************
3620          * 8. Setup and register mac80211
3621          **********************************/
3622
3623         /* enable interrupts if needed: hw bug w/a */
3624         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3625         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3626                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3627                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3628         }
3629
3630         iwl_enable_interrupts(priv);
3631
3632         err = iwl_setup_mac(priv);
3633         if (err)
3634                 goto out_remove_sysfs;
3635
3636         err = iwl_dbgfs_register(priv, DRV_NAME);
3637         if (err)
3638                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3639
3640         /* If platform's RF_KILL switch is NOT set to KILL */
3641         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3642                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3643         else
3644                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3645
3646         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3647                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3648
3649         iwl_power_initialize(priv);
3650         iwl_tt_initialize(priv);
3651         return 0;
3652
3653  out_remove_sysfs:
3654         destroy_workqueue(priv->workqueue);
3655         priv->workqueue = NULL;
3656         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3657  out_free_irq:
3658         free_irq(priv->pci_dev->irq, priv);
3659         iwl_free_isr_ict(priv);
3660  out_disable_msi:
3661         pci_disable_msi(priv->pci_dev);
3662         iwl_uninit_drv(priv);
3663  out_free_eeprom:
3664         iwl_eeprom_free(priv);
3665  out_iounmap:
3666         pci_iounmap(pdev, priv->hw_base);
3667  out_pci_release_regions:
3668         pci_set_drvdata(pdev, NULL);
3669         pci_release_regions(pdev);
3670  out_pci_disable_device:
3671         pci_disable_device(pdev);
3672  out_ieee80211_free_hw:
3673         iwl_free_traffic_mem(priv);
3674         ieee80211_free_hw(priv->hw);
3675  out:
3676         return err;
3677 }
3678
3679 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3680 {
3681         struct iwl_priv *priv = pci_get_drvdata(pdev);
3682         unsigned long flags;
3683
3684         if (!priv)
3685                 return;
3686
3687         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3688
3689         iwl_dbgfs_unregister(priv);
3690         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3691
3692         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3693          * to be called and iwl_down since we are removing the device
3694          * we need to set STATUS_EXIT_PENDING bit.
3695          */
3696         set_bit(STATUS_EXIT_PENDING, &priv->status);
3697         if (priv->mac80211_registered) {
3698                 ieee80211_unregister_hw(priv->hw);
3699                 priv->mac80211_registered = 0;
3700         } else {
3701                 iwl_down(priv);
3702         }
3703
3704         /*
3705          * Make sure device is reset to low power before unloading driver.
3706          * This may be redundant with iwl_down(), but there are paths to
3707          * run iwl_down() without calling apm_ops.stop(), and there are
3708          * paths to avoid running iwl_down() at all before leaving driver.
3709          * This (inexpensive) call *makes sure* device is reset.
3710          */
3711         priv->cfg->ops->lib->apm_ops.stop(priv);
3712
3713         iwl_tt_exit(priv);
3714
3715         /* make sure we flush any pending irq or
3716          * tasklet for the driver
3717          */
3718         spin_lock_irqsave(&priv->lock, flags);
3719         iwl_disable_interrupts(priv);
3720         spin_unlock_irqrestore(&priv->lock, flags);
3721
3722         iwl_synchronize_irq(priv);
3723
3724         iwl_dealloc_ucode_pci(priv);
3725
3726         if (priv->rxq.bd)
3727                 iwl_rx_queue_free(priv, &priv->rxq);
3728         iwl_hw_txq_ctx_free(priv);
3729
3730         iwl_clear_stations_table(priv);
3731         iwl_eeprom_free(priv);
3732
3733
3734         /*netif_stop_queue(dev); */
3735         flush_workqueue(priv->workqueue);
3736
3737         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3738          * priv->workqueue... so we can't take down the workqueue
3739          * until now... */
3740         destroy_workqueue(priv->workqueue);
3741         priv->workqueue = NULL;
3742         iwl_free_traffic_mem(priv);
3743
3744         free_irq(priv->pci_dev->irq, priv);
3745         pci_disable_msi(priv->pci_dev);
3746         pci_iounmap(pdev, priv->hw_base);
3747         pci_release_regions(pdev);
3748         pci_disable_device(pdev);
3749         pci_set_drvdata(pdev, NULL);
3750
3751         iwl_uninit_drv(priv);
3752
3753         iwl_free_isr_ict(priv);
3754
3755         if (priv->ibss_beacon)
3756                 dev_kfree_skb(priv->ibss_beacon);
3757
3758         ieee80211_free_hw(priv->hw);
3759 }
3760
3761
3762 /*****************************************************************************
3763  *
3764  * driver and module entry point
3765  *
3766  *****************************************************************************/
3767
3768 /* Hardware specific file defines the PCI IDs table for that hardware module */
3769 static struct pci_device_id iwl_hw_card_ids[] = {
3770 #ifdef CONFIG_IWL4965
3771         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3772         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3773 #endif /* CONFIG_IWL4965 */
3774 #ifdef CONFIG_IWL5000
3775 /* 5100 Series WiFi */
3776         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
3777         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
3778         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
3779         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
3780         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
3781         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
3782         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
3783         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
3784         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
3785         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
3786         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
3787         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
3788         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
3789         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
3790         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
3791         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
3792         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
3793         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
3794         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
3795         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
3796         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
3797         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
3798         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
3799         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
3800
3801 /* 5300 Series WiFi */
3802         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
3803         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
3804         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
3805         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
3806         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
3807         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
3808         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
3809         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
3810         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
3811         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
3812         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
3813         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
3814
3815 /* 5350 Series WiFi/WiMax */
3816         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
3817         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
3818         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
3819
3820 /* 5150 Series Wifi/WiMax */
3821         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
3822         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
3823         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
3824         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
3825         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
3826         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
3827
3828         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
3829         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
3830         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
3831         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
3832
3833 /* 6x00 Series */
3834         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3835         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3836         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3837         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3838         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3839         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3840         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3841         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3842         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3843         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3844
3845 /* 6x50 WiFi/WiMax Series */
3846         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3847         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3848         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3849         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3850         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3851         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3852
3853 /* 1000 Series WiFi */
3854         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3855         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3856         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3857         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3858         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3859         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3860         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3861         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3862         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3863         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3864         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3865         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3866 #endif /* CONFIG_IWL5000 */
3867
3868         {0}
3869 };
3870 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3871
3872 static struct pci_driver iwl_driver = {
3873         .name = DRV_NAME,
3874         .id_table = iwl_hw_card_ids,
3875         .probe = iwl_pci_probe,
3876         .remove = __devexit_p(iwl_pci_remove),
3877 #ifdef CONFIG_PM
3878         .suspend = iwl_pci_suspend,
3879         .resume = iwl_pci_resume,
3880 #endif
3881 };
3882
3883 static int __init iwl_init(void)
3884 {
3885
3886         int ret;
3887         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3888         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3889
3890         ret = iwlagn_rate_control_register();
3891         if (ret) {
3892                 printk(KERN_ERR DRV_NAME
3893                        "Unable to register rate control algorithm: %d\n", ret);
3894                 return ret;
3895         }
3896
3897         ret = pci_register_driver(&iwl_driver);
3898         if (ret) {
3899                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3900                 goto error_register;
3901         }
3902
3903         return ret;
3904
3905 error_register:
3906         iwlagn_rate_control_unregister();
3907         return ret;
3908 }
3909
3910 static void __exit iwl_exit(void)
3911 {
3912         pci_unregister_driver(&iwl_driver);
3913         iwlagn_rate_control_unregister();
3914 }
3915
3916 module_exit(iwl_exit);
3917 module_init(iwl_init);
3918
3919 #ifdef CONFIG_IWLWIFI_DEBUG
3920 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3921 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3922 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3923 MODULE_PARM_DESC(debug, "debug output mask");
3924 #endif
3925