SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 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 #include "iwl-agn.h"
  58
  59
  60 /******************************************************************************
  61  *
  62  * module boiler plate
  63  *
  64  ******************************************************************************/
  65
  66 /*
  67  * module name, copyright, version, etc.
  68  */
  69 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  70
  71 #ifdef CONFIG_IWLWIFI_DEBUG
  72 #define VD "d"
  73 #else
  74 #define VD
  75 #endif
  76
  77 #define DRV_VERSION     IWLWIFI_VERSION VD
  78
  79
  80 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  81 MODULE_VERSION(DRV_VERSION);
  82 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  83 MODULE_LICENSE("GPL");
  84 MODULE_ALIAS("iwl4965");
  85
  86 /*************** STATION TABLE MANAGEMENT ****
  87  * mac80211 should be examined to determine if sta_info is duplicating
  88  * the functionality provided here
  89  */
  90
  91 /**************************************************************/
  92
  93 /**
  94  * iwl_commit_rxon - commit staging_rxon to hardware
  95  *
  96  * The RXON command in staging_rxon is committed to the hardware and
  97  * the active_rxon structure is updated with the new data.  This
  98  * function correctly transitions out of the RXON_ASSOC_MSK state if
  99  * a HW tune is required based on the RXON structure changes.
 100  */
 101 int iwl_commit_rxon(struct iwl_priv *priv)
 102 {
 103         /* cast away the const for active_rxon in this function */
 104         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 105         int ret;
 106         bool new_assoc =
 107                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 108
 109         if (!iwl_is_alive(priv))
 110                 return -EBUSY;
 111
 112         /* always get timestamp with Rx frame */
 113         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 114
 115         ret = iwl_check_rxon_cmd(priv);
 116         if (ret) {
 117                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 118                 return -EINVAL;
 119         }
 120
 121         /*
 122          * receive commit_rxon request
 123          * abort any previous channel switch if still in process
 124          */
 125         if (priv->switch_rxon.switch_in_progress &&
 126             (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
 127                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 128                       le16_to_cpu(priv->switch_rxon.channel));
 129                 priv->switch_rxon.switch_in_progress = false;
 130         }
 131
 132         /* If we don't need to send a full RXON, we can use
 133          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 134          * and other flags for the current radio configuration. */
 135         if (!iwl_full_rxon_required(priv)) {
 136                 ret = iwl_send_rxon_assoc(priv);
 137                 if (ret) {
 138                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 139                         return ret;
 140                 }
 141
 142                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 143                 iwl_print_rx_config_cmd(priv);
 144                 return 0;
 145         }
 146
 147         /* station table will be cleared */
 148         priv->assoc_station_added = 0;
 149
 150         /* If we are currently associated and the new config requires
 151          * an RXON_ASSOC and the new config wants the associated mask enabled,
 152          * we must clear the associated from the active configuration
 153          * before we apply the new config */
 154         if (iwl_is_associated(priv) && new_assoc) {
 155                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 156                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 157
 158                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 159                                       sizeof(struct iwl_rxon_cmd),
 160                                       &priv->active_rxon);
 161
 162                 /* If the mask clearing failed then we set
 163                  * active_rxon back to what it was previously */
 164                 if (ret) {
 165                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 166                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 167                         return ret;
 168                 }
 169                 iwl_clear_ucode_stations(priv, false);
 170                 iwl_restore_stations(priv);
 171         }
 172
 173         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 174                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 175                        "* channel = %d\n"
 176                        "* bssid = %pM\n",
 177                        (new_assoc ? "" : "out"),
 178                        le16_to_cpu(priv->staging_rxon.channel),
 179                        priv->staging_rxon.bssid_addr);
 180
 181         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 182
 183         /* Apply the new configuration
 184          * RXON unassoc clears the station table in uCode so restoration of
 185          * stations is needed after it (the RXON command) completes
 186          */
 187         if (!new_assoc) {
 188                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 189                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 190                 if (ret) {
 191                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 192                         return ret;
 193                 }
 194                 IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON. \n");
 195                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 196                 iwl_clear_ucode_stations(priv, false);
 197                 iwl_restore_stations(priv);
 198         }
 199
 200         priv->start_calib = 0;
 201
 202         /* If we have set the ASSOC_MSK and we are in BSS mode then
 203          * add the IWL_AP_ID to the station rate table */
 204         if (new_assoc) {
 205                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 206                         ret = iwl_rxon_add_station(priv,
 207                                            priv->active_rxon.bssid_addr, 1);
 208                         if (ret == IWL_INVALID_STATION) {
 209                                 IWL_ERR(priv,
 210                                         "Error adding AP address for TX.\n");
 211                                 return -EIO;
 212                         }
 213                         priv->assoc_station_added = 1;
 214                         if (priv->default_wep_key &&
 215                             iwl_send_static_wepkey_cmd(priv, 0))
 216                                 IWL_ERR(priv,
 217                                         "Could not send WEP static key.\n");
 218                 }
 219
 220                 /*
 221                  * allow CTS-to-self if possible for new association.
 222                  * this is relevant only for 5000 series and up,
 223                  * but will not damage 4965
 224                  */
 225                 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 226
 227                 /* Apply the new configuration
 228                  * RXON assoc doesn't clear the station table in uCode,
 229                  */
 230                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 231                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 232                 if (ret) {
 233                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 234                         return ret;
 235                 }
 236                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 237         }
 238         iwl_print_rx_config_cmd(priv);
 239
 240         iwl_init_sensitivity(priv);
 241
 242         /* If we issue a new RXON command which required a tune then we must
 243          * send a new TXPOWER command or we won't be able to Tx any frames */
 244         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 245         if (ret) {
 246                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 247                 return ret;
 248         }
 249
 250         return 0;
 251 }
 252
 253 void iwl_update_chain_flags(struct iwl_priv *priv)
 254 {
 255
 256         if (priv->cfg->ops->hcmd->set_rxon_chain)
 257                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 258         iwlcore_commit_rxon(priv);
 259 }
 260
 261 static void iwl_clear_free_frames(struct iwl_priv *priv)
 262 {
 263         struct list_head *element;
 264
 265         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 266                        priv->frames_count);
 267
 268         while (!list_empty(&priv->free_frames)) {
 269                 element = priv->free_frames.next;
 270                 list_del(element);
 271                 kfree(list_entry(element, struct iwl_frame, list));
 272                 priv->frames_count--;
 273         }
 274
 275         if (priv->frames_count) {
 276                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 277                             priv->frames_count);
 278                 priv->frames_count = 0;
 279         }
 280 }
 281
 282 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 283 {
 284         struct iwl_frame *frame;
 285         struct list_head *element;
 286         if (list_empty(&priv->free_frames)) {
 287                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 288                 if (!frame) {
 289                         IWL_ERR(priv, "Could not allocate frame!\n");
 290                         return NULL;
 291                 }
 292
 293                 priv->frames_count++;
 294                 return frame;
 295         }
 296
 297         element = priv->free_frames.next;
 298         list_del(element);
 299         return list_entry(element, struct iwl_frame, list);
 300 }
 301
 302 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 303 {
 304         memset(frame, 0, sizeof(*frame));
 305         list_add(&frame->list, &priv->free_frames);
 306 }
 307
 308 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
 309                                           struct ieee80211_hdr *hdr,
 310                                           int left)
 311 {
 312         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 313             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 314              (priv->iw_mode != NL80211_IFTYPE_AP)))
 315                 return 0;
 316
 317         if (priv->ibss_beacon->len > left)
 318                 return 0;
 319
 320         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 321
 322         return priv->ibss_beacon->len;
 323 }
 324
 325 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 326 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 327                 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 328                 u8 *beacon, u32 frame_size)
 329 {
 330         u16 tim_idx;
 331         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 332
 333         /*
 334          * The index is relative to frame start but we start looking at the
 335          * variable-length part of the beacon.
 336          */
 337         tim_idx = mgmt->u.beacon.variable - beacon;
 338
 339         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 340         while ((tim_idx < (frame_size - 2)) &&
 341                         (beacon[tim_idx] != WLAN_EID_TIM))
 342                 tim_idx += beacon[tim_idx+1] + 2;
 343
 344         /* If TIM field was found, set variables */
 345         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 346                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 347                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 348         } else
 349                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 350 }
 351
 352 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 353                                        struct iwl_frame *frame)
 354 {
 355         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 356         u32 frame_size;
 357         u32 rate_flags;
 358         u32 rate;
 359         /*
 360          * We have to set up the TX command, the TX Beacon command, and the
 361          * beacon contents.
 362          */
 363
 364         /* Initialize memory */
 365         tx_beacon_cmd = &frame->u.beacon;
 366         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 367
 368         /* Set up TX beacon contents */
 369         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 370                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 371         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
 372                 return 0;
 373
 374         /* Set up TX command fields */
 375         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 376         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 377         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 378         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 379                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 380
 381         /* Set up TX beacon command fields */
 382         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
 383                         frame_size);
 384
 385         /* Set up packet rate and flags */
 386         rate = iwl_rate_get_lowest_plcp(priv);
 387         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
 388         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 389         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
 390                 rate_flags |= RATE_MCS_CCK_MSK;
 391         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
 392                         rate_flags);
 393
 394         return sizeof(*tx_beacon_cmd) + frame_size;
 395 }
 396 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 397 {
 398         struct iwl_frame *frame;
 399         unsigned int frame_size;
 400         int rc;
 401
 402         frame = iwl_get_free_frame(priv);
 403         if (!frame) {
 404                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 405                           "command.\n");
 406                 return -ENOMEM;
 407         }
 408
 409         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
 410         if (!frame_size) {
 411                 IWL_ERR(priv, "Error configuring the beacon command\n");
 412                 iwl_free_frame(priv, frame);
 413                 return -EINVAL;
 414         }
 415
 416         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 417                               &frame->u.cmd[0]);
 418
 419         iwl_free_frame(priv, frame);
 420
 421         return rc;
 422 }
 423
 424 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 425 {
 426         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 427
 428         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 429         if (sizeof(dma_addr_t) > sizeof(u32))
 430                 addr |=
 431                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 432
 433         return addr;
 434 }
 435
 436 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 437 {
 438         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 439
 440         return le16_to_cpu(tb->hi_n_len) >> 4;
 441 }
 442
 443 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 444                                   dma_addr_t addr, u16 len)
 445 {
 446         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 447         u16 hi_n_len = len << 4;
 448
 449         put_unaligned_le32(addr, &tb->lo);
 450         if (sizeof(dma_addr_t) > sizeof(u32))
 451                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 452
 453         tb->hi_n_len = cpu_to_le16(hi_n_len);
 454
 455         tfd->num_tbs = idx + 1;
 456 }
 457
 458 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 459 {
 460         return tfd->num_tbs & 0x1f;
 461 }
 462
 463 /**
 464  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 465  * @priv - driver private data
 466  * @txq - tx queue
 467  *
 468  * Does NOT advance any TFD circular buffer read/write indexes
 469  * Does NOT free the TFD itself (which is within circular buffer)
 470  */
 471 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 472 {
 473         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 474         struct iwl_tfd *tfd;
 475         struct pci_dev *dev = priv->pci_dev;
 476         int index = txq->q.read_ptr;
 477         int i;
 478         int num_tbs;
 479
 480         tfd = &tfd_tmp[index];
 481
 482         /* Sanity check on number of chunks */
 483         num_tbs = iwl_tfd_get_num_tbs(tfd);
 484
 485         if (num_tbs >= IWL_NUM_OF_TBS) {
 486                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 487                 /* @todo issue fatal error, it is quite serious situation */
 488                 return;
 489         }
 490
 491         /* Unmap tx_cmd */
 492         if (num_tbs)
 493                 pci_unmap_single(dev,
 494                                 pci_unmap_addr(&txq->meta[index], mapping),
 495                                 pci_unmap_len(&txq->meta[index], len),
 496                                 PCI_DMA_BIDIRECTIONAL);
 497
 498         /* Unmap chunks, if any. */
 499         for (i = 1; i < num_tbs; i++) {
 500                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 501                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 502
 503                 if (txq->txb) {
 504                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 505                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 506                 }
 507         }
 508 }
 509
 510 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 511                                  struct iwl_tx_queue *txq,
 512                                  dma_addr_t addr, u16 len,
 513                                  u8 reset, u8 pad)
 514 {
 515         struct iwl_queue *q;
 516         struct iwl_tfd *tfd, *tfd_tmp;
 517         u32 num_tbs;
 518
 519         q = &txq->q;
 520         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 521         tfd = &tfd_tmp[q->write_ptr];
 522
 523         if (reset)
 524                 memset(tfd, 0, sizeof(*tfd));
 525
 526         num_tbs = iwl_tfd_get_num_tbs(tfd);
 527
 528         /* Each TFD can point to a maximum 20 Tx buffers */
 529         if (num_tbs >= IWL_NUM_OF_TBS) {
 530                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 531                           IWL_NUM_OF_TBS);
 532                 return -EINVAL;
 533         }
 534
 535         BUG_ON(addr & ~DMA_BIT_MASK(36));
 536         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 537                 IWL_ERR(priv, "Unaligned address = %llx\n",
 538                           (unsigned long long)addr);
 539
 540         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 541
 542         return 0;
 543 }
 544
 545 /*
 546  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 547  * given Tx queue, and enable the DMA channel used for that queue.
 548  *
 549  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 550  * channels supported in hardware.
 551  */
 552 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 553                          struct iwl_tx_queue *txq)
 554 {
 555         int txq_id = txq->q.id;
 556
 557         /* Circular buffer (TFD queue in DRAM) physical base address */
 558         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 559                              txq->q.dma_addr >> 8);
 560
 561         return 0;
 562 }
 563
 564 /******************************************************************************
 565  *
 566  * Generic RX handler implementations
 567  *
 568  ******************************************************************************/
 569 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 570                                 struct iwl_rx_mem_buffer *rxb)
 571 {
 572         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 573         struct iwl_alive_resp *palive;
 574         struct delayed_work *pwork;
 575
 576         palive = &pkt->u.alive_frame;
 577
 578         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 579                        "0x%01X 0x%01X\n",
 580                        palive->is_valid, palive->ver_type,
 581                        palive->ver_subtype);
 582
 583         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 584                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 585                 memcpy(&priv->card_alive_init,
 586                        &pkt->u.alive_frame,
 587                        sizeof(struct iwl_init_alive_resp));
 588                 pwork = &priv->init_alive_start;
 589         } else {
 590                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 591                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 592                        sizeof(struct iwl_alive_resp));
 593                 pwork = &priv->alive_start;
 594         }
 595
 596         /* We delay the ALIVE response by 5ms to
 597          * give the HW RF Kill time to activate... */
 598         if (palive->is_valid == UCODE_VALID_OK)
 599                 queue_delayed_work(priv->workqueue, pwork,
 600                                    msecs_to_jiffies(5));
 601         else
 602                 IWL_WARN(priv, "uCode did not respond OK.\n");
 603 }
 604
 605 static void iwl_bg_beacon_update(struct work_struct *work)
 606 {
 607         struct iwl_priv *priv =
 608                 container_of(work, struct iwl_priv, beacon_update);
 609         struct sk_buff *beacon;
 610
 611         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 612         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 613
 614         if (!beacon) {
 615                 IWL_ERR(priv, "update beacon failed\n");
 616                 return;
 617         }
 618
 619         mutex_lock(&priv->mutex);
 620         /* new beacon skb is allocated every time; dispose previous.*/
 621         if (priv->ibss_beacon)
 622                 dev_kfree_skb(priv->ibss_beacon);
 623
 624         priv->ibss_beacon = beacon;
 625         mutex_unlock(&priv->mutex);
 626
 627         iwl_send_beacon_cmd(priv);
 628 }
 629
 630 /**
 631  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 632  *
 633  * This callback is provided in order to send a statistics request.
 634  *
 635  * This timer function is continually reset to execute within
 636  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 637  * was received.  We need to ensure we receive the statistics in order
 638  * to update the temperature used for calibrating the TXPOWER.
 639  */
 640 static void iwl_bg_statistics_periodic(unsigned long data)
 641 {
 642         struct iwl_priv *priv = (struct iwl_priv *)data;
 643
 644         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 645                 return;
 646
 647         /* dont send host command if rf-kill is on */
 648         if (!iwl_is_ready_rf(priv))
 649                 return;
 650
 651         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 652 }
 653
 654
 655 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 656                                         u32 start_idx, u32 num_events,
 657                                         u32 mode)
 658 {
 659         u32 i;
 660         u32 ptr;        /* SRAM byte address of log data */
 661         u32 ev, time, data; /* event log data */
 662         unsigned long reg_flags;
 663
 664         if (mode == 0)
 665                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 666         else
 667                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 668
 669         /* Make sure device is powered up for SRAM reads */
 670         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 671         if (iwl_grab_nic_access(priv)) {
 672                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 673                 return;
 674         }
 675
 676         /* Set starting address; reads will auto-increment */
 677         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
 678         rmb();
 679
 680         /*
 681          * "time" is actually "data" for mode 0 (no timestamp).
 682          * place event id # at far right for easier visual parsing.
 683          */
 684         for (i = 0; i < num_events; i++) {
 685                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 686                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 687                 if (mode == 0) {
 688                         trace_iwlwifi_dev_ucode_cont_event(priv,
 689                                                         0, time, ev);
 690                 } else {
 691                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 692                         trace_iwlwifi_dev_ucode_cont_event(priv,
 693                                                 time, data, ev);
 694                 }
 695         }
 696         /* Allow device to power down */
 697         iwl_release_nic_access(priv);
 698         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 699 }
 700
 701 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 702 {
 703         u32 capacity;   /* event log capacity in # entries */
 704         u32 base;       /* SRAM byte address of event log header */
 705         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 706         u32 num_wraps;  /* # times uCode wrapped to top of log */
 707         u32 next_entry; /* index of next entry to be written by uCode */
 708
 709         if (priv->ucode_type == UCODE_INIT)
 710                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
 711         else
 712                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 713         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
 714                 capacity = iwl_read_targ_mem(priv, base);
 715                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
 716                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
 717                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
 718         } else
 719                 return;
 720
 721         if (num_wraps == priv->event_log.num_wraps) {
 722                 iwl_print_cont_event_trace(priv,
 723                                        base, priv->event_log.next_entry,
 724                                        next_entry - priv->event_log.next_entry,
 725                                        mode);
 726                 priv->event_log.non_wraps_count++;
 727         } else {
 728                 if ((num_wraps - priv->event_log.num_wraps) > 1)
 729                         priv->event_log.wraps_more_count++;
 730                 else
 731                         priv->event_log.wraps_once_count++;
 732                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 733                                 num_wraps - priv->event_log.num_wraps,
 734                                 next_entry, priv->event_log.next_entry);
 735                 if (next_entry < priv->event_log.next_entry) {
 736                         iwl_print_cont_event_trace(priv, base,
 737                                priv->event_log.next_entry,
 738                                capacity - priv->event_log.next_entry,
 739                                mode);
 740
 741                         iwl_print_cont_event_trace(priv, base, 0,
 742                                 next_entry, mode);
 743                 } else {
 744                         iwl_print_cont_event_trace(priv, base,
 745                                next_entry, capacity - next_entry,
 746                                mode);
 747
 748                         iwl_print_cont_event_trace(priv, base, 0,
 749                                 next_entry, mode);
 750                 }
 751         }
 752         priv->event_log.num_wraps = num_wraps;
 753         priv->event_log.next_entry = next_entry;
 754 }
 755
 756 /**
 757  * iwl_bg_ucode_trace - Timer callback to log ucode event
 758  *
 759  * The timer is continually set to execute every
 760  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 761  * this function is to perform continuous uCode event logging operation
 762  * if enabled
 763  */
 764 static void iwl_bg_ucode_trace(unsigned long data)
 765 {
 766         struct iwl_priv *priv = (struct iwl_priv *)data;
 767
 768         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 769                 return;
 770
 771         if (priv->event_log.ucode_trace) {
 772                 iwl_continuous_event_trace(priv);
 773                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 774                 mod_timer(&priv->ucode_trace,
 775                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 776         }
 777 }
 778
 779 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 780                                 struct iwl_rx_mem_buffer *rxb)
 781 {
 782 #ifdef CONFIG_IWLWIFI_DEBUG
 783         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 784         struct iwl4965_beacon_notif *beacon =
 785                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 786         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 787
 788         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 789                 "tsf %d %d rate %d\n",
 790                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 791                 beacon->beacon_notify_hdr.failure_frame,
 792                 le32_to_cpu(beacon->ibss_mgr_status),
 793                 le32_to_cpu(beacon->high_tsf),
 794                 le32_to_cpu(beacon->low_tsf), rate);
 795 #endif
 796
 797         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 798             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 799                 queue_work(priv->workqueue, &priv->beacon_update);
 800 }
 801
 802 /* Handle notification from uCode that card's power state is changing
 803  * due to software, hardware, or critical temperature RFKILL */
 804 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 805                                     struct iwl_rx_mem_buffer *rxb)
 806 {
 807         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 808         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 809         unsigned long status = priv->status;
 810
 811         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 812                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 813                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 814                           (flags & CT_CARD_DISABLED) ?
 815                           "Reached" : "Not reached");
 816
 817         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 818                      CT_CARD_DISABLED)) {
 819
 820                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 821                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 822
 823                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 824                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 825
 826                 if (!(flags & RXON_CARD_DISABLED)) {
 827                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 828                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 829                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 830                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 831                 }
 832                 if (flags & CT_CARD_DISABLED)
 833                         iwl_tt_enter_ct_kill(priv);
 834         }
 835         if (!(flags & CT_CARD_DISABLED))
 836                 iwl_tt_exit_ct_kill(priv);
 837
 838         if (flags & HW_CARD_DISABLED)
 839                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 840         else
 841                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 842
 843
 844         if (!(flags & RXON_CARD_DISABLED))
 845                 iwl_scan_cancel(priv);
 846
 847         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 848              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 849                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 850                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 851         else
 852                 wake_up_interruptible(&priv->wait_command_queue);
 853 }
 854
 855 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 856 {
 857         if (src == IWL_PWR_SRC_VAUX) {
 858                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 859                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 860                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 861                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 862         } else {
 863                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 864                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 865                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 866         }
 867
 868         return 0;
 869 }
 870
 871 /**
 872  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 873  *
 874  * Setup the RX handlers for each of the reply types sent from the uCode
 875  * to the host.
 876  *
 877  * This function chains into the hardware specific files for them to setup
 878  * any hardware specific handlers as well.
 879  */
 880 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 881 {
 882         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 883         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 884         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 885         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 886                         iwl_rx_spectrum_measure_notif;
 887         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 888         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 889             iwl_rx_pm_debug_statistics_notif;
 890         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 891
 892         /*
 893          * The same handler is used for both the REPLY to a discrete
 894          * statistics request from the host as well as for the periodic
 895          * statistics notifications (after received beacons) from the uCode.
 896          */
 897         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
 898         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 899
 900         iwl_setup_rx_scan_handlers(priv);
 901
 902         /* status change handler */
 903         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 904
 905         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 906             iwl_rx_missed_beacon_notif;
 907         /* Rx handlers */
 908         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 909         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 910         /* block ack */
 911         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 912         /* Set up hardware specific Rx handlers */
 913         priv->cfg->ops->lib->rx_handler_setup(priv);
 914 }
 915
 916 /**
 917  * iwl_rx_handle - Main entry function for receiving responses from uCode
 918  *
 919  * Uses the priv->rx_handlers callback function array to invoke
 920  * the appropriate handlers, including command responses,
 921  * frame-received notifications, and other notifications.
 922  */
 923 void iwl_rx_handle(struct iwl_priv *priv)
 924 {
 925         struct iwl_rx_mem_buffer *rxb;
 926         struct iwl_rx_packet *pkt;
 927         struct iwl_rx_queue *rxq = &priv->rxq;
 928         u32 r, i;
 929         int reclaim;
 930         unsigned long flags;
 931         u8 fill_rx = 0;
 932         u32 count = 8;
 933         int total_empty;
 934
 935         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 936          * buffer that the driver may process (last buffer filled by ucode). */
 937         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 938         i = rxq->read;
 939
 940         /* Rx interrupt, but nothing sent from uCode */
 941         if (i == r)
 942                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 943
 944         /* calculate total frames need to be restock after handling RX */
 945         total_empty = r - rxq->write_actual;
 946         if (total_empty < 0)
 947                 total_empty += RX_QUEUE_SIZE;
 948
 949         if (total_empty > (RX_QUEUE_SIZE / 2))
 950                 fill_rx = 1;
 951
 952         while (i != r) {
 953                 rxb = rxq->queue[i];
 954
 955                 /* If an RXB doesn't have a Rx queue slot associated with it,
 956                  * then a bug has been introduced in the queue refilling
 957                  * routines -- catch it here */
 958                 BUG_ON(rxb == NULL);
 959
 960                 rxq->queue[i] = NULL;
 961
 962                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
 963                                PAGE_SIZE << priv->hw_params.rx_page_order,
 964                                PCI_DMA_FROMDEVICE);
 965                 pkt = rxb_addr(rxb);
 966
 967                 trace_iwlwifi_dev_rx(priv, pkt,
 968                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
 969
 970                 /* Reclaim a command buffer only if this packet is a response
 971                  *   to a (driver-originated) command.
 972                  * If the packet (e.g. Rx frame) originated from uCode,
 973                  *   there is no command buffer to reclaim.
 974                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 975                  *   but apparently a few don't get set; catch them here. */
 976                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 977                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 978                         (pkt->hdr.cmd != REPLY_RX) &&
 979                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 980                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 981                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 982                         (pkt->hdr.cmd != REPLY_TX);
 983
 984                 /* Based on type of command response or notification,
 985                  *   handle those that need handling via function in
 986                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 987                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 988                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 989                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 990                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 991                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 992                 } else {
 993                         /* No handling needed */
 994                         IWL_DEBUG_RX(priv,
 995                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 996                                 r, i, get_cmd_string(pkt->hdr.cmd),
 997                                 pkt->hdr.cmd);
 998                 }
 999
1000                 /*
1001                  * XXX: After here, we should always check rxb->page
1002                  * against NULL before touching it or its virtual
1003                  * memory (pkt). Because some rx_handler might have
1004                  * already taken or freed the pages.
1005                  */
1006
1007                 if (reclaim) {
1008                         /* Invoke any callbacks, transfer the buffer to caller,
1009                          * and fire off the (possibly) blocking iwl_send_cmd()
1010                          * as we reclaim the driver command queue */
1011                         if (rxb->page)
1012                                 iwl_tx_cmd_complete(priv, rxb);
1013                         else
1014                                 IWL_WARN(priv, "Claim null rxb?\n");
1015                 }
1016
1017                 /* Reuse the page if possible. For notification packets and
1018                  * SKBs that fail to Rx correctly, add them back into the
1019                  * rx_free list for reuse later. */
1020                 spin_lock_irqsave(&rxq->lock, flags);
1021                 if (rxb->page != NULL) {
1022                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1023                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1024                                 PCI_DMA_FROMDEVICE);
1025                         list_add_tail(&rxb->list, &rxq->rx_free);
1026                         rxq->free_count++;
1027                 } else
1028                         list_add_tail(&rxb->list, &rxq->rx_used);
1029
1030                 spin_unlock_irqrestore(&rxq->lock, flags);
1031
1032                 i = (i + 1) & RX_QUEUE_MASK;
1033                 /* If there are a lot of unused frames,
1034                  * restock the Rx queue so ucode wont assert. */
1035                 if (fill_rx) {
1036                         count++;
1037                         if (count >= 8) {
1038                                 rxq->read = i;
1039                                 iwl_rx_replenish_now(priv);
1040                                 count = 0;
1041                         }
1042                 }
1043         }
1044
1045         /* Backtrack one entry */
1046         rxq->read = i;
1047         if (fill_rx)
1048                 iwl_rx_replenish_now(priv);
1049         else
1050                 iwl_rx_queue_restock(priv);
1051 }
1052
1053 /* call this function to flush any scheduled tasklet */
1054 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1055 {
1056         /* wait to make sure we flush pending tasklet*/
1057         synchronize_irq(priv->pci_dev->irq);
1058         tasklet_kill(&priv->irq_tasklet);
1059 }
1060
1061 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
1062 {
1063         u32 inta, handled = 0;
1064         u32 inta_fh;
1065         unsigned long flags;
1066         u32 i;
1067 #ifdef CONFIG_IWLWIFI_DEBUG
1068         u32 inta_mask;
1069 #endif
1070
1071         spin_lock_irqsave(&priv->lock, flags);
1072
1073         /* Ack/clear/reset pending uCode interrupts.
1074          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1075          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1076         inta = iwl_read32(priv, CSR_INT);
1077         iwl_write32(priv, CSR_INT, inta);
1078
1079         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1080          * Any new interrupts that happen after this, either while we're
1081          * in this tasklet, or later, will show up in next ISR/tasklet. */
1082         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1083         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1084
1085 #ifdef CONFIG_IWLWIFI_DEBUG
1086         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1087                 /* just for debug */
1088                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1089                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1090                               inta, inta_mask, inta_fh);
1091         }
1092 #endif
1093
1094         spin_unlock_irqrestore(&priv->lock, flags);
1095
1096         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1097          * atomic, make sure that inta covers all the interrupts that
1098          * we've discovered, even if FH interrupt came in just after
1099          * reading CSR_INT. */
1100         if (inta_fh & CSR49_FH_INT_RX_MASK)
1101                 inta |= CSR_INT_BIT_FH_RX;
1102         if (inta_fh & CSR49_FH_INT_TX_MASK)
1103                 inta |= CSR_INT_BIT_FH_TX;
1104
1105         /* Now service all interrupt bits discovered above. */
1106         if (inta & CSR_INT_BIT_HW_ERR) {
1107                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1108
1109                 /* Tell the device to stop sending interrupts */
1110                 iwl_disable_interrupts(priv);
1111
1112                 priv->isr_stats.hw++;
1113                 iwl_irq_handle_error(priv);
1114
1115                 handled |= CSR_INT_BIT_HW_ERR;
1116
1117                 return;
1118         }
1119
1120 #ifdef CONFIG_IWLWIFI_DEBUG
1121         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1122                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1123                 if (inta & CSR_INT_BIT_SCD) {
1124                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1125                                       "the frame/frames.\n");
1126                         priv->isr_stats.sch++;
1127                 }
1128
1129                 /* Alive notification via Rx interrupt will do the real work */
1130                 if (inta & CSR_INT_BIT_ALIVE) {
1131                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1132                         priv->isr_stats.alive++;
1133                 }
1134         }
1135 #endif
1136         /* Safely ignore these bits for debug checks below */
1137         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1138
1139         /* HW RF KILL switch toggled */
1140         if (inta & CSR_INT_BIT_RF_KILL) {
1141                 int hw_rf_kill = 0;
1142                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1143                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1144                         hw_rf_kill = 1;
1145
1146                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1147                                 hw_rf_kill ? "disable radio" : "enable radio");
1148
1149                 priv->isr_stats.rfkill++;
1150
1151                 /* driver only loads ucode once setting the interface up.
1152                  * the driver allows loading the ucode even if the radio
1153                  * is killed. Hence update the killswitch state here. The
1154                  * rfkill handler will care about restarting if needed.
1155                  */
1156                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1157                         if (hw_rf_kill)
1158                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1159                         else
1160                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1161                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1162                 }
1163
1164                 handled |= CSR_INT_BIT_RF_KILL;
1165         }
1166
1167         /* Chip got too hot and stopped itself */
1168         if (inta & CSR_INT_BIT_CT_KILL) {
1169                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1170                 priv->isr_stats.ctkill++;
1171                 handled |= CSR_INT_BIT_CT_KILL;
1172         }
1173
1174         /* Error detected by uCode */
1175         if (inta & CSR_INT_BIT_SW_ERR) {
1176                 IWL_ERR(priv, "Microcode SW error detected. "
1177                         " Restarting 0x%X.\n", inta);
1178                 priv->isr_stats.sw++;
1179                 priv->isr_stats.sw_err = inta;
1180                 iwl_irq_handle_error(priv);
1181                 handled |= CSR_INT_BIT_SW_ERR;
1182         }
1183
1184         /*
1185          * uCode wakes up after power-down sleep.
1186          * Tell device about any new tx or host commands enqueued,
1187          * and about any Rx buffers made available while asleep.
1188          */
1189         if (inta & CSR_INT_BIT_WAKEUP) {
1190                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1191                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1192                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1193                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1194                 priv->isr_stats.wakeup++;
1195                 handled |= CSR_INT_BIT_WAKEUP;
1196         }
1197
1198         /* All uCode command responses, including Tx command responses,
1199          * Rx "responses" (frame-received notification), and other
1200          * notifications from uCode come through here*/
1201         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1202                 iwl_rx_handle(priv);
1203                 priv->isr_stats.rx++;
1204                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1205         }
1206
1207         /* This "Tx" DMA channel is used only for loading uCode */
1208         if (inta & CSR_INT_BIT_FH_TX) {
1209                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1210                 priv->isr_stats.tx++;
1211                 handled |= CSR_INT_BIT_FH_TX;
1212                 /* Wake up uCode load routine, now that load is complete */
1213                 priv->ucode_write_complete = 1;
1214                 wake_up_interruptible(&priv->wait_command_queue);
1215         }
1216
1217         if (inta & ~handled) {
1218                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1219                 priv->isr_stats.unhandled++;
1220         }
1221
1222         if (inta & ~(priv->inta_mask)) {
1223                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1224                          inta & ~priv->inta_mask);
1225                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1226         }
1227
1228         /* Re-enable all interrupts */
1229         /* only Re-enable if diabled by irq */
1230         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1231                 iwl_enable_interrupts(priv);
1232
1233 #ifdef CONFIG_IWLWIFI_DEBUG
1234         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1235                 inta = iwl_read32(priv, CSR_INT);
1236                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1237                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1238                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1239                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1240         }
1241 #endif
1242 }
1243
1244 /* tasklet for iwlagn interrupt */
1245 static void iwl_irq_tasklet(struct iwl_priv *priv)
1246 {
1247         u32 inta = 0;
1248         u32 handled = 0;
1249         unsigned long flags;
1250         u32 i;
1251 #ifdef CONFIG_IWLWIFI_DEBUG
1252         u32 inta_mask;
1253 #endif
1254
1255         spin_lock_irqsave(&priv->lock, flags);
1256
1257         /* Ack/clear/reset pending uCode interrupts.
1258          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1259          */
1260         iwl_write32(priv, CSR_INT, priv->_agn.inta);
1261
1262         inta = priv->_agn.inta;
1263
1264 #ifdef CONFIG_IWLWIFI_DEBUG
1265         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1266                 /* just for debug */
1267                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1268                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1269                                 inta, inta_mask);
1270         }
1271 #endif
1272
1273         spin_unlock_irqrestore(&priv->lock, flags);
1274
1275         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
1276         priv->_agn.inta = 0;
1277
1278         /* Now service all interrupt bits discovered above. */
1279         if (inta & CSR_INT_BIT_HW_ERR) {
1280                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1281
1282                 /* Tell the device to stop sending interrupts */
1283                 iwl_disable_interrupts(priv);
1284
1285                 priv->isr_stats.hw++;
1286                 iwl_irq_handle_error(priv);
1287
1288                 handled |= CSR_INT_BIT_HW_ERR;
1289
1290                 return;
1291         }
1292
1293 #ifdef CONFIG_IWLWIFI_DEBUG
1294         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1295                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1296                 if (inta & CSR_INT_BIT_SCD) {
1297                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1298                                       "the frame/frames.\n");
1299                         priv->isr_stats.sch++;
1300                 }
1301
1302                 /* Alive notification via Rx interrupt will do the real work */
1303                 if (inta & CSR_INT_BIT_ALIVE) {
1304                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1305                         priv->isr_stats.alive++;
1306                 }
1307         }
1308 #endif
1309         /* Safely ignore these bits for debug checks below */
1310         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1311
1312         /* HW RF KILL switch toggled */
1313         if (inta & CSR_INT_BIT_RF_KILL) {
1314                 int hw_rf_kill = 0;
1315                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1316                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1317                         hw_rf_kill = 1;
1318
1319                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1320                                 hw_rf_kill ? "disable radio" : "enable radio");
1321
1322                 priv->isr_stats.rfkill++;
1323
1324                 /* driver only loads ucode once setting the interface up.
1325                  * the driver allows loading the ucode even if the radio
1326                  * is killed. Hence update the killswitch state here. The
1327                  * rfkill handler will care about restarting if needed.
1328                  */
1329                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1330                         if (hw_rf_kill)
1331                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1332                         else
1333                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1334                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1335                 }
1336
1337                 handled |= CSR_INT_BIT_RF_KILL;
1338         }
1339
1340         /* Chip got too hot and stopped itself */
1341         if (inta & CSR_INT_BIT_CT_KILL) {
1342                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1343                 priv->isr_stats.ctkill++;
1344                 handled |= CSR_INT_BIT_CT_KILL;
1345         }
1346
1347         /* Error detected by uCode */
1348         if (inta & CSR_INT_BIT_SW_ERR) {
1349                 IWL_ERR(priv, "Microcode SW error detected. "
1350                         " Restarting 0x%X.\n", inta);
1351                 priv->isr_stats.sw++;
1352                 priv->isr_stats.sw_err = inta;
1353                 iwl_irq_handle_error(priv);
1354                 handled |= CSR_INT_BIT_SW_ERR;
1355         }
1356
1357         /* uCode wakes up after power-down sleep */
1358         if (inta & CSR_INT_BIT_WAKEUP) {
1359                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1360                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1361                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1362                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1363
1364                 priv->isr_stats.wakeup++;
1365
1366                 handled |= CSR_INT_BIT_WAKEUP;
1367         }
1368
1369         /* All uCode command responses, including Tx command responses,
1370          * Rx "responses" (frame-received notification), and other
1371          * notifications from uCode come through here*/
1372         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1373                         CSR_INT_BIT_RX_PERIODIC)) {
1374                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1375                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1376                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1377                         iwl_write32(priv, CSR_FH_INT_STATUS,
1378                                         CSR49_FH_INT_RX_MASK);
1379                 }
1380                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1381                         handled |= CSR_INT_BIT_RX_PERIODIC;
1382                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1383                 }
1384                 /* Sending RX interrupt require many steps to be done in the
1385                  * the device:
1386                  * 1- write interrupt to current index in ICT table.
1387                  * 2- dma RX frame.
1388                  * 3- update RX shared data to indicate last write index.
1389                  * 4- send interrupt.
1390                  * This could lead to RX race, driver could receive RX interrupt
1391                  * but the shared data changes does not reflect this;
1392                  * periodic interrupt will detect any dangling Rx activity.
1393                  */
1394
1395                 /* Disable periodic interrupt; we use it as just a one-shot. */
1396                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1397                             CSR_INT_PERIODIC_DIS);
1398                 iwl_rx_handle(priv);
1399
1400                 /*
1401                  * Enable periodic interrupt in 8 msec only if we received
1402                  * real RX interrupt (instead of just periodic int), to catch
1403                  * any dangling Rx interrupt.  If it was just the periodic
1404                  * interrupt, there was no dangling Rx activity, and no need
1405                  * to extend the periodic interrupt; one-shot is enough.
1406                  */
1407                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1408                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1409                                     CSR_INT_PERIODIC_ENA);
1410
1411                 priv->isr_stats.rx++;
1412         }
1413
1414         /* This "Tx" DMA channel is used only for loading uCode */
1415         if (inta & CSR_INT_BIT_FH_TX) {
1416                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1417                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1418                 priv->isr_stats.tx++;
1419                 handled |= CSR_INT_BIT_FH_TX;
1420                 /* Wake up uCode load routine, now that load is complete */
1421                 priv->ucode_write_complete = 1;
1422                 wake_up_interruptible(&priv->wait_command_queue);
1423         }
1424
1425         if (inta & ~handled) {
1426                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1427                 priv->isr_stats.unhandled++;
1428         }
1429
1430         if (inta & ~(priv->inta_mask)) {
1431                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1432                          inta & ~priv->inta_mask);
1433         }
1434
1435         /* Re-enable all interrupts */
1436         /* only Re-enable if diabled by irq */
1437         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1438                 iwl_enable_interrupts(priv);
1439 }
1440
1441
1442 /******************************************************************************
1443  *
1444  * uCode download functions
1445  *
1446  ******************************************************************************/
1447
1448 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1449 {
1450         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1451         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1452         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1453         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1454         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1455         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1456 }
1457
1458 static void iwl_nic_start(struct iwl_priv *priv)
1459 {
1460         /* Remove all resets to allow NIC to operate */
1461         iwl_write32(priv, CSR_RESET, 0);
1462 }
1463
1464
1465 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1466 static int iwl_mac_setup_register(struct iwl_priv *priv);
1467
1468 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1469 {
1470         const char *name_pre = priv->cfg->fw_name_pre;
1471
1472         if (first)
1473                 priv->fw_index = priv->cfg->ucode_api_max;
1474         else
1475                 priv->fw_index--;
1476
1477         if (priv->fw_index < priv->cfg->ucode_api_min) {
1478                 IWL_ERR(priv, "no suitable firmware found!\n");
1479                 return -ENOENT;
1480         }
1481
1482         sprintf(priv->firmware_name, "%s%d%s",
1483                 name_pre, priv->fw_index, ".ucode");
1484
1485         IWL_DEBUG_INFO(priv, "attempting to load firmware '%s'\n",
1486                        priv->firmware_name);
1487
1488         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1489                                        &priv->pci_dev->dev, GFP_KERNEL, priv,
1490                                        iwl_ucode_callback);
1491 }
1492
1493 /**
1494  * iwl_ucode_callback - callback when firmware was loaded
1495  *
1496  * If loaded successfully, copies the firmware into buffers
1497  * for the card to fetch (via DMA).
1498  */
1499 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1500 {
1501         struct iwl_priv *priv = context;
1502         struct iwl_ucode_header *ucode;
1503         const unsigned int api_max = priv->cfg->ucode_api_max;
1504         const unsigned int api_min = priv->cfg->ucode_api_min;
1505         u8 *src;
1506         size_t len;
1507         u32 api_ver, build;
1508         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1509         int err;
1510         u16 eeprom_ver;
1511
1512         if (!ucode_raw) {
1513                 IWL_ERR(priv, "request for firmware file '%s' failed.\n",
1514                         priv->firmware_name);
1515                 goto try_again;
1516         }
1517
1518         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1519                        priv->firmware_name, ucode_raw->size);
1520
1521         /* Make sure that we got at least the v1 header! */
1522         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1523                 IWL_ERR(priv, "File size way too small!\n");
1524                 goto try_again;
1525         }
1526
1527         /* Data from ucode file:  header followed by uCode images */
1528         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1529
1530         priv->ucode_ver = le32_to_cpu(ucode->ver);
1531         api_ver = IWL_UCODE_API(priv->ucode_ver);
1532         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1533         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1534         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1535         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1536         init_data_size =
1537                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1538         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1539         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1540
1541         /* api_ver should match the api version forming part of the
1542          * firmware filename ... but we don't check for that and only rely
1543          * on the API version read from firmware header from here on forward */
1544
1545         if (api_ver < api_min || api_ver > api_max) {
1546                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1547                           "Driver supports v%u, firmware is v%u.\n",
1548                           api_max, api_ver);
1549                 goto try_again;
1550         }
1551
1552         if (api_ver != api_max)
1553                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1554                           "got v%u. New firmware can be obtained "
1555                           "from http://www.intellinuxwireless.org.\n",
1556                           api_max, api_ver);
1557
1558         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1559                IWL_UCODE_MAJOR(priv->ucode_ver),
1560                IWL_UCODE_MINOR(priv->ucode_ver),
1561                IWL_UCODE_API(priv->ucode_ver),
1562                IWL_UCODE_SERIAL(priv->ucode_ver));
1563
1564         snprintf(priv->hw->wiphy->fw_version,
1565                  sizeof(priv->hw->wiphy->fw_version),
1566                  "%u.%u.%u.%u",
1567                  IWL_UCODE_MAJOR(priv->ucode_ver),
1568                  IWL_UCODE_MINOR(priv->ucode_ver),
1569                  IWL_UCODE_API(priv->ucode_ver),
1570                  IWL_UCODE_SERIAL(priv->ucode_ver));
1571
1572         if (build)
1573                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1574
1575         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1576         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1577                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1578                        ? "OTP" : "EEPROM", eeprom_ver);
1579
1580         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1581                        priv->ucode_ver);
1582         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1583                        inst_size);
1584         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1585                        data_size);
1586         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1587                        init_size);
1588         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1589                        init_data_size);
1590         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1591                        boot_size);
1592
1593         /*
1594          * For any of the failures below (before allocating pci memory)
1595          * we will try to load a version with a smaller API -- maybe the
1596          * user just got a corrupted version of the latest API.
1597          */
1598
1599         /* Verify size of file vs. image size info in file's header */
1600         if (ucode_raw->size !=
1601                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1602                 inst_size + data_size + init_size +
1603                 init_data_size + boot_size) {
1604
1605                 IWL_DEBUG_INFO(priv,
1606                         "uCode file size %d does not match expected size\n",
1607                         (int)ucode_raw->size);
1608                 goto try_again;
1609         }
1610
1611         /* Verify that uCode images will fit in card's SRAM */
1612         if (inst_size > priv->hw_params.max_inst_size) {
1613                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1614                                inst_size);
1615                 goto try_again;
1616         }
1617
1618         if (data_size > priv->hw_params.max_data_size) {
1619                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1620                                 data_size);
1621                 goto try_again;
1622         }
1623         if (init_size > priv->hw_params.max_inst_size) {
1624                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1625                         init_size);
1626                 goto try_again;
1627         }
1628         if (init_data_size > priv->hw_params.max_data_size) {
1629                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1630                       init_data_size);
1631                 goto try_again;
1632         }
1633         if (boot_size > priv->hw_params.max_bsm_size) {
1634                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1635                         boot_size);
1636                 goto try_again;
1637         }
1638
1639         /* Allocate ucode buffers for card's bus-master loading ... */
1640
1641         /* Runtime instructions and 2 copies of data:
1642          * 1) unmodified from disk
1643          * 2) backup cache for save/restore during power-downs */
1644         priv->ucode_code.len = inst_size;
1645         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1646
1647         priv->ucode_data.len = data_size;
1648         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1649
1650         priv->ucode_data_backup.len = data_size;
1651         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1652
1653         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1654             !priv->ucode_data_backup.v_addr)
1655                 goto err_pci_alloc;
1656
1657         /* Initialization instructions and data */
1658         if (init_size && init_data_size) {
1659                 priv->ucode_init.len = init_size;
1660                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1661
1662                 priv->ucode_init_data.len = init_data_size;
1663                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1664
1665                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1666                         goto err_pci_alloc;
1667         }
1668
1669         /* Bootstrap (instructions only, no data) */
1670         if (boot_size) {
1671                 priv->ucode_boot.len = boot_size;
1672                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1673
1674                 if (!priv->ucode_boot.v_addr)
1675                         goto err_pci_alloc;
1676         }
1677
1678         /* Copy images into buffers for card's bus-master reads ... */
1679
1680         /* Runtime instructions (first block of data in file) */
1681         len = inst_size;
1682         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1683         memcpy(priv->ucode_code.v_addr, src, len);
1684         src += len;
1685
1686         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1687                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1688
1689         /* Runtime data (2nd block)
1690          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1691         len = data_size;
1692         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1693         memcpy(priv->ucode_data.v_addr, src, len);
1694         memcpy(priv->ucode_data_backup.v_addr, src, len);
1695         src += len;
1696
1697         /* Initialization instructions (3rd block) */
1698         if (init_size) {
1699                 len = init_size;
1700                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1701                                 len);
1702                 memcpy(priv->ucode_init.v_addr, src, len);
1703                 src += len;
1704         }
1705
1706         /* Initialization data (4th block) */
1707         if (init_data_size) {
1708                 len = init_data_size;
1709                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1710                                len);
1711                 memcpy(priv->ucode_init_data.v_addr, src, len);
1712                 src += len;
1713         }
1714
1715         /* Bootstrap instructions (5th block) */
1716         len = boot_size;
1717         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1718         memcpy(priv->ucode_boot.v_addr, src, len);
1719
1720         /**************************************************
1721          * This is still part of probe() in a sense...
1722          *
1723          * 9. Setup and register with mac80211 and debugfs
1724          **************************************************/
1725         err = iwl_mac_setup_register(priv);
1726         if (err)
1727                 goto out_unbind;
1728
1729         err = iwl_dbgfs_register(priv, DRV_NAME);
1730         if (err)
1731                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1732
1733         /* We have our copies now, allow OS release its copies */
1734         release_firmware(ucode_raw);
1735         return;
1736
1737  try_again:
1738         /* try next, if any */
1739         if (iwl_request_firmware(priv, false))
1740                 goto out_unbind;
1741         release_firmware(ucode_raw);
1742         return;
1743
1744  err_pci_alloc:
1745         IWL_ERR(priv, "failed to allocate pci memory\n");
1746         iwl_dealloc_ucode_pci(priv);
1747  out_unbind:
1748         device_release_driver(&priv->pci_dev->dev);
1749         release_firmware(ucode_raw);
1750 }
1751
1752 static const char *desc_lookup_text[] = {
1753         "OK",
1754         "FAIL",
1755         "BAD_PARAM",
1756         "BAD_CHECKSUM",
1757         "NMI_INTERRUPT_WDG",
1758         "SYSASSERT",
1759         "FATAL_ERROR",
1760         "BAD_COMMAND",
1761         "HW_ERROR_TUNE_LOCK",
1762         "HW_ERROR_TEMPERATURE",
1763         "ILLEGAL_CHAN_FREQ",
1764         "VCC_NOT_STABLE",
1765         "FH_ERROR",
1766         "NMI_INTERRUPT_HOST",
1767         "NMI_INTERRUPT_ACTION_PT",
1768         "NMI_INTERRUPT_UNKNOWN",
1769         "UCODE_VERSION_MISMATCH",
1770         "HW_ERROR_ABS_LOCK",
1771         "HW_ERROR_CAL_LOCK_FAIL",
1772         "NMI_INTERRUPT_INST_ACTION_PT",
1773         "NMI_INTERRUPT_DATA_ACTION_PT",
1774         "NMI_TRM_HW_ER",
1775         "NMI_INTERRUPT_TRM",
1776         "NMI_INTERRUPT_BREAK_POINT"
1777         "DEBUG_0",
1778         "DEBUG_1",
1779         "DEBUG_2",
1780         "DEBUG_3",
1781         "ADVANCED SYSASSERT"
1782 };
1783
1784 static const char *desc_lookup(int i)
1785 {
1786         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1787
1788         if (i < 0 || i > max)
1789                 i = max;
1790
1791         return desc_lookup_text[i];
1792 }
1793
1794 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1795 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1796
1797 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1798 {
1799         u32 data2, line;
1800         u32 desc, time, count, base, data1;
1801         u32 blink1, blink2, ilink1, ilink2;
1802
1803         if (priv->ucode_type == UCODE_INIT)
1804                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1805         else
1806                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1807
1808         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1809                 IWL_ERR(priv,
1810                         "Not valid error log pointer 0x%08X for %s uCode\n",
1811                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1812                 return;
1813         }
1814
1815         count = iwl_read_targ_mem(priv, base);
1816
1817         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1818                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1819                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1820                         priv->status, count);
1821         }
1822
1823         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1824         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1825         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1826         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1827         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1828         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1829         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1830         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1831         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1832
1833         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1834                                       blink1, blink2, ilink1, ilink2);
1835
1836         IWL_ERR(priv, "Desc                               Time       "
1837                 "data1      data2      line\n");
1838         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1839                 desc_lookup(desc), desc, time, data1, data2, line);
1840         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1841         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1842                 ilink1, ilink2);
1843
1844 }
1845
1846 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1847
1848 /**
1849  * iwl_print_event_log - Dump error event log to syslog
1850  *
1851  */
1852 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1853                                u32 num_events, u32 mode,
1854                                int pos, char **buf, size_t bufsz)
1855 {
1856         u32 i;
1857         u32 base;       /* SRAM byte address of event log header */
1858         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1859         u32 ptr;        /* SRAM byte address of log data */
1860         u32 ev, time, data; /* event log data */
1861         unsigned long reg_flags;
1862
1863         if (num_events == 0)
1864                 return pos;
1865         if (priv->ucode_type == UCODE_INIT)
1866                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1867         else
1868                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1869
1870         if (mode == 0)
1871                 event_size = 2 * sizeof(u32);
1872         else
1873                 event_size = 3 * sizeof(u32);
1874
1875         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1876
1877         /* Make sure device is powered up for SRAM reads */
1878         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1879         iwl_grab_nic_access(priv);
1880
1881         /* Set starting address; reads will auto-increment */
1882         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1883         rmb();
1884
1885         /* "time" is actually "data" for mode 0 (no timestamp).
1886         * place event id # at far right for easier visual parsing. */
1887         for (i = 0; i < num_events; i++) {
1888                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1889                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1890                 if (mode == 0) {
1891                         /* data, ev */
1892                         if (bufsz) {
1893                                 pos += scnprintf(*buf + pos, bufsz - pos,
1894                                                 "EVT_LOG:0x%08x:%04u\n",
1895                                                 time, ev);
1896                         } else {
1897                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1898                                         time, ev);
1899                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1900                                         time, ev);
1901                         }
1902                 } else {
1903                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1904                         if (bufsz) {
1905                                 pos += scnprintf(*buf + pos, bufsz - pos,
1906                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1907                                                  time, data, ev);
1908                         } else {
1909                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1910                                         time, data, ev);
1911                                 trace_iwlwifi_dev_ucode_event(priv, time,
1912                                         data, ev);
1913                         }
1914                 }
1915         }
1916
1917         /* Allow device to power down */
1918         iwl_release_nic_access(priv);
1919         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1920         return pos;
1921 }
1922
1923 /**
1924  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1925  */
1926 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1927                                     u32 num_wraps, u32 next_entry,
1928                                     u32 size, u32 mode,
1929                                     int pos, char **buf, size_t bufsz)
1930 {
1931         /*
1932          * display the newest DEFAULT_LOG_ENTRIES entries
1933          * i.e the entries just before the next ont that uCode would fill.
1934          */
1935         if (num_wraps) {
1936                 if (next_entry < size) {
1937                         pos = iwl_print_event_log(priv,
1938                                                 capacity - (size - next_entry),
1939                                                 size - next_entry, mode,
1940                                                 pos, buf, bufsz);
1941                         pos = iwl_print_event_log(priv, 0,
1942                                                   next_entry, mode,
1943                                                   pos, buf, bufsz);
1944                 } else
1945                         pos = iwl_print_event_log(priv, next_entry - size,
1946                                                   size, mode, pos, buf, bufsz);
1947         } else {
1948                 if (next_entry < size) {
1949                         pos = iwl_print_event_log(priv, 0, next_entry,
1950                                                   mode, pos, buf, bufsz);
1951                 } else {
1952                         pos = iwl_print_event_log(priv, next_entry - size,
1953                                                   size, mode, pos, buf, bufsz);
1954                 }
1955         }
1956         return pos;
1957 }
1958
1959 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1960 #define MAX_EVENT_LOG_SIZE (512)
1961
1962 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1963
1964 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1965                             char **buf, bool display)
1966 {
1967         u32 base;       /* SRAM byte address of event log header */
1968         u32 capacity;   /* event log capacity in # entries */
1969         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1970         u32 num_wraps;  /* # times uCode wrapped to top of log */
1971         u32 next_entry; /* index of next entry to be written by uCode */
1972         u32 size;       /* # entries that we'll print */
1973         int pos = 0;
1974         size_t bufsz = 0;
1975
1976         if (priv->ucode_type == UCODE_INIT)
1977                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1978         else
1979                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1980
1981         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1982                 IWL_ERR(priv,
1983                         "Invalid event log pointer 0x%08X for %s uCode\n",
1984                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
1985                 return -EINVAL;
1986         }
1987
1988         /* event log header */
1989         capacity = iwl_read_targ_mem(priv, base);
1990         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1991         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1992         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1993
1994         if (capacity > MAX_EVENT_LOG_SIZE) {
1995                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1996                         capacity, MAX_EVENT_LOG_SIZE);
1997                 capacity = MAX_EVENT_LOG_SIZE;
1998         }
1999
2000         if (next_entry > MAX_EVENT_LOG_SIZE) {
2001                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
2002                         next_entry, MAX_EVENT_LOG_SIZE);
2003                 next_entry = MAX_EVENT_LOG_SIZE;
2004         }
2005
2006         size = num_wraps ? capacity : next_entry;
2007
2008         /* bail out if nothing in log */
2009         if (size == 0) {
2010                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2011                 return pos;
2012         }
2013
2014 #ifdef CONFIG_IWLWIFI_DEBUG
2015         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
2016                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2017                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2018 #else
2019         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2020                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2021 #endif
2022         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2023                 size);
2024
2025 #ifdef CONFIG_IWLWIFI_DEBUG
2026         if (display) {
2027                 if (full_log)
2028                         bufsz = capacity * 48;
2029                 else
2030                         bufsz = size * 48;
2031                 *buf = kmalloc(bufsz, GFP_KERNEL);
2032                 if (!*buf)
2033                         return -ENOMEM;
2034         }
2035         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2036                 /*
2037                  * if uCode has wrapped back to top of log,
2038                  * start at the oldest entry,
2039                  * i.e the next one that uCode would fill.
2040                  */
2041                 if (num_wraps)
2042                         pos = iwl_print_event_log(priv, next_entry,
2043                                                 capacity - next_entry, mode,
2044                                                 pos, buf, bufsz);
2045                 /* (then/else) start at top of log */
2046                 pos = iwl_print_event_log(priv, 0,
2047                                           next_entry, mode, pos, buf, bufsz);
2048         } else
2049                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2050                                                 next_entry, size, mode,
2051                                                 pos, buf, bufsz);
2052 #else
2053         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2054                                         next_entry, size, mode,
2055                                         pos, buf, bufsz);
2056 #endif
2057         return pos;
2058 }
2059
2060 /**
2061  * iwl_alive_start - called after REPLY_ALIVE notification received
2062  *                   from protocol/runtime uCode (initialization uCode's
2063  *                   Alive gets handled by iwl_init_alive_start()).
2064  */
2065 static void iwl_alive_start(struct iwl_priv *priv)
2066 {
2067         int ret = 0;
2068
2069         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2070
2071         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2072                 /* We had an error bringing up the hardware, so take it
2073                  * all the way back down so we can try again */
2074                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2075                 goto restart;
2076         }
2077
2078         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2079          * This is a paranoid check, because we would not have gotten the
2080          * "runtime" alive if code weren't properly loaded.  */
2081         if (iwl_verify_ucode(priv)) {
2082                 /* Runtime instruction load was bad;
2083                  * take it all the way back down so we can try again */
2084                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2085                 goto restart;
2086         }
2087
2088         ret = priv->cfg->ops->lib->alive_notify(priv);
2089         if (ret) {
2090                 IWL_WARN(priv,
2091                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
2092                 goto restart;
2093         }
2094
2095         /* After the ALIVE response, we can send host commands to the uCode */
2096         set_bit(STATUS_ALIVE, &priv->status);
2097
2098         if (iwl_is_rfkill(priv))
2099                 return;
2100
2101         ieee80211_wake_queues(priv->hw);
2102
2103         priv->active_rate = IWL_RATES_MASK;
2104
2105         /* Configure Tx antenna selection based on H/W config */
2106         if (priv->cfg->ops->hcmd->set_tx_ant)
2107                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2108
2109         if (iwl_is_associated(priv)) {
2110                 struct iwl_rxon_cmd *active_rxon =
2111                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
2112                 /* apply any changes in staging */
2113                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2114                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2115         } else {
2116                 /* Initialize our rx_config data */
2117                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2118
2119                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2120                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2121
2122                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2123         }
2124
2125         /* Configure Bluetooth device coexistence support */
2126         iwl_send_bt_config(priv);
2127
2128         iwl_reset_run_time_calib(priv);
2129
2130         /* Configure the adapter for unassociated operation */
2131         iwlcore_commit_rxon(priv);
2132
2133         /* At this point, the NIC is initialized and operational */
2134         iwl_rf_kill_ct_config(priv);
2135
2136         iwl_leds_init(priv);
2137
2138         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2139         set_bit(STATUS_READY, &priv->status);
2140         wake_up_interruptible(&priv->wait_command_queue);
2141
2142         iwl_power_update_mode(priv, true);
2143         IWL_DEBUG_INFO(priv, "Updated power mode\n");
2144
2145
2146         return;
2147
2148  restart:
2149         queue_work(priv->workqueue, &priv->restart);
2150 }
2151
2152 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2153
2154 static void __iwl_down(struct iwl_priv *priv)
2155 {
2156         unsigned long flags;
2157         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2158
2159         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2160
2161         if (!exit_pending)
2162                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2163
2164         iwl_clear_ucode_stations(priv, true);
2165
2166         /* Unblock any waiting calls */
2167         wake_up_interruptible_all(&priv->wait_command_queue);
2168
2169         /* Wipe out the EXIT_PENDING status bit if we are not actually
2170          * exiting the module */
2171         if (!exit_pending)
2172                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2173
2174         /* stop and reset the on-board processor */
2175         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2176
2177         /* tell the device to stop sending interrupts */
2178         spin_lock_irqsave(&priv->lock, flags);
2179         iwl_disable_interrupts(priv);
2180         spin_unlock_irqrestore(&priv->lock, flags);
2181         iwl_synchronize_irq(priv);
2182
2183         if (priv->mac80211_registered)
2184                 ieee80211_stop_queues(priv->hw);
2185
2186         /* If we have not previously called iwl_init() then
2187          * clear all bits but the RF Kill bit and return */
2188         if (!iwl_is_init(priv)) {
2189                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2190                                         STATUS_RF_KILL_HW |
2191                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2192                                         STATUS_GEO_CONFIGURED |
2193                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2194                                         STATUS_EXIT_PENDING;
2195                 goto exit;
2196         }
2197
2198         /* ...otherwise clear out all the status bits but the RF Kill
2199          * bit and continue taking the NIC down. */
2200         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2201                                 STATUS_RF_KILL_HW |
2202                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2203                                 STATUS_GEO_CONFIGURED |
2204                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2205                                 STATUS_FW_ERROR |
2206                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2207                                 STATUS_EXIT_PENDING;
2208
2209         /* device going down, Stop using ICT table */
2210         iwl_disable_ict(priv);
2211
2212         iwl_txq_ctx_stop(priv);
2213         iwl_rxq_stop(priv);
2214
2215         /* Power-down device's busmaster DMA clocks */
2216         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2217         udelay(5);
2218
2219         /* Make sure (redundant) we've released our request to stay awake */
2220         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2221
2222         /* Stop the device, and put it in low power state */
2223         priv->cfg->ops->lib->apm_ops.stop(priv);
2224
2225  exit:
2226         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2227
2228         if (priv->ibss_beacon)
2229                 dev_kfree_skb(priv->ibss_beacon);
2230         priv->ibss_beacon = NULL;
2231
2232         /* clear out any free frames */
2233         iwl_clear_free_frames(priv);
2234 }
2235
2236 static void iwl_down(struct iwl_priv *priv)
2237 {
2238         mutex_lock(&priv->mutex);
2239         __iwl_down(priv);
2240         mutex_unlock(&priv->mutex);
2241
2242         iwl_cancel_deferred_work(priv);
2243 }
2244
2245 #define HW_READY_TIMEOUT (50)
2246
2247 static int iwl_set_hw_ready(struct iwl_priv *priv)
2248 {
2249         int ret = 0;
2250
2251         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2252                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2253
2254         /* See if we got it */
2255         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2256                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2257                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2258                                 HW_READY_TIMEOUT);
2259         if (ret != -ETIMEDOUT)
2260                 priv->hw_ready = true;
2261         else
2262                 priv->hw_ready = false;
2263
2264         IWL_DEBUG_INFO(priv, "hardware %s\n",
2265                       (priv->hw_ready == 1) ? "ready" : "not ready");
2266         return ret;
2267 }
2268
2269 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2270 {
2271         int ret = 0;
2272
2273         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2274
2275         ret = iwl_set_hw_ready(priv);
2276         if (priv->hw_ready)
2277                 return ret;
2278
2279         /* If HW is not ready, prepare the conditions to check again */
2280         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2281                         CSR_HW_IF_CONFIG_REG_PREPARE);
2282
2283         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2284                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2285                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2286
2287         /* HW should be ready by now, check again. */
2288         if (ret != -ETIMEDOUT)
2289                 iwl_set_hw_ready(priv);
2290
2291         return ret;
2292 }
2293
2294 #define MAX_HW_RESTARTS 5
2295
2296 static int __iwl_up(struct iwl_priv *priv)
2297 {
2298         int i;
2299         int ret;
2300
2301         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2302                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2303                 return -EIO;
2304         }
2305
2306         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2307                 IWL_ERR(priv, "ucode not available for device bringup\n");
2308                 return -EIO;
2309         }
2310
2311         iwl_prepare_card_hw(priv);
2312
2313         if (!priv->hw_ready) {
2314                 IWL_WARN(priv, "Exit HW not ready\n");
2315                 return -EIO;
2316         }
2317
2318         /* If platform's RF_KILL switch is NOT set to KILL */
2319         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2320                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2321         else
2322                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2323
2324         if (iwl_is_rfkill(priv)) {
2325                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2326
2327                 iwl_enable_interrupts(priv);
2328                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2329                 return 0;
2330         }
2331
2332         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2333
2334         ret = iwl_hw_nic_init(priv);
2335         if (ret) {
2336                 IWL_ERR(priv, "Unable to init nic\n");
2337                 return ret;
2338         }
2339
2340         /* make sure rfkill handshake bits are cleared */
2341         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2342         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2343                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2344
2345         /* clear (again), then enable host interrupts */
2346         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2347         iwl_enable_interrupts(priv);
2348
2349         /* really make sure rfkill handshake bits are cleared */
2350         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2351         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2352
2353         /* Copy original ucode data image from disk into backup cache.
2354          * This will be used to initialize the on-board processor's
2355          * data SRAM for a clean start when the runtime program first loads. */
2356         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2357                priv->ucode_data.len);
2358
2359         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2360
2361                 /* load bootstrap state machine,
2362                  * load bootstrap program into processor's memory,
2363                  * prepare to load the "initialize" uCode */
2364                 ret = priv->cfg->ops->lib->load_ucode(priv);
2365
2366                 if (ret) {
2367                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2368                                 ret);
2369                         continue;
2370                 }
2371
2372                 /* start card; "initialize" will load runtime ucode */
2373                 iwl_nic_start(priv);
2374
2375                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2376
2377                 return 0;
2378         }
2379
2380         set_bit(STATUS_EXIT_PENDING, &priv->status);
2381         __iwl_down(priv);
2382         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2383
2384         /* tried to restart and config the device for as long as our
2385          * patience could withstand */
2386         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2387         return -EIO;
2388 }
2389
2390
2391 /*****************************************************************************
2392  *
2393  * Workqueue callbacks
2394  *
2395  *****************************************************************************/
2396
2397 static void iwl_bg_init_alive_start(struct work_struct *data)
2398 {
2399         struct iwl_priv *priv =
2400             container_of(data, struct iwl_priv, init_alive_start.work);
2401
2402         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2403                 return;
2404
2405         mutex_lock(&priv->mutex);
2406         priv->cfg->ops->lib->init_alive_start(priv);
2407         mutex_unlock(&priv->mutex);
2408 }
2409
2410 static void iwl_bg_alive_start(struct work_struct *data)
2411 {
2412         struct iwl_priv *priv =
2413             container_of(data, struct iwl_priv, alive_start.work);
2414
2415         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2416                 return;
2417
2418         /* enable dram interrupt */
2419         iwl_reset_ict(priv);
2420
2421         mutex_lock(&priv->mutex);
2422         iwl_alive_start(priv);
2423         mutex_unlock(&priv->mutex);
2424 }
2425
2426 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2427 {
2428         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2429                         run_time_calib_work);
2430
2431         mutex_lock(&priv->mutex);
2432
2433         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2434             test_bit(STATUS_SCANNING, &priv->status)) {
2435                 mutex_unlock(&priv->mutex);
2436                 return;
2437         }
2438
2439         if (priv->start_calib) {
2440                 iwl_chain_noise_calibration(priv, &priv->statistics);
2441
2442                 iwl_sensitivity_calibration(priv, &priv->statistics);
2443         }
2444
2445         mutex_unlock(&priv->mutex);
2446         return;
2447 }
2448
2449 static void iwl_bg_restart(struct work_struct *data)
2450 {
2451         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2452
2453         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2454                 return;
2455
2456         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2457                 mutex_lock(&priv->mutex);
2458                 priv->vif = NULL;
2459                 priv->is_open = 0;
2460                 mutex_unlock(&priv->mutex);
2461                 iwl_down(priv);
2462                 ieee80211_restart_hw(priv->hw);
2463         } else {
2464                 iwl_down(priv);
2465
2466                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2467                         return;
2468
2469                 mutex_lock(&priv->mutex);
2470                 __iwl_up(priv);
2471                 mutex_unlock(&priv->mutex);
2472         }
2473 }
2474
2475 static void iwl_bg_rx_replenish(struct work_struct *data)
2476 {
2477         struct iwl_priv *priv =
2478             container_of(data, struct iwl_priv, rx_replenish);
2479
2480         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2481                 return;
2482
2483         mutex_lock(&priv->mutex);
2484         iwl_rx_replenish(priv);
2485         mutex_unlock(&priv->mutex);
2486 }
2487
2488 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2489
2490 void iwl_post_associate(struct iwl_priv *priv)
2491 {
2492         struct ieee80211_conf *conf = NULL;
2493         int ret = 0;
2494         unsigned long flags;
2495
2496         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2497                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2498                 return;
2499         }
2500
2501         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2502                         priv->assoc_id, priv->active_rxon.bssid_addr);
2503
2504
2505         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2506                 return;
2507
2508
2509         if (!priv->vif || !priv->is_open)
2510                 return;
2511
2512         iwl_scan_cancel_timeout(priv, 200);
2513
2514         conf = ieee80211_get_hw_conf(priv->hw);
2515
2516         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2517         iwlcore_commit_rxon(priv);
2518
2519         iwl_setup_rxon_timing(priv);
2520         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2521                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2522         if (ret)
2523                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2524                             "Attempting to continue.\n");
2525
2526         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2527
2528         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2529
2530         if (priv->cfg->ops->hcmd->set_rxon_chain)
2531                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2532
2533         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2534
2535         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2536                         priv->assoc_id, priv->beacon_int);
2537
2538         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2539                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2540         else
2541                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2542
2543         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2544                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2545                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2546                 else
2547                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2548
2549                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2550                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2551
2552         }
2553
2554         iwlcore_commit_rxon(priv);
2555
2556         switch (priv->iw_mode) {
2557         case NL80211_IFTYPE_STATION:
2558                 break;
2559
2560         case NL80211_IFTYPE_ADHOC:
2561
2562                 /* assume default assoc id */
2563                 priv->assoc_id = 1;
2564
2565                 iwl_rxon_add_station(priv, priv->bssid, 0);
2566                 iwl_send_beacon_cmd(priv);
2567
2568                 break;
2569
2570         default:
2571                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2572                           __func__, priv->iw_mode);
2573                 break;
2574         }
2575
2576         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2577                 priv->assoc_station_added = 1;
2578
2579         spin_lock_irqsave(&priv->lock, flags);
2580         iwl_activate_qos(priv, 0);
2581         spin_unlock_irqrestore(&priv->lock, flags);
2582
2583         /* the chain noise calibration will enabled PM upon completion
2584          * If chain noise has already been run, then we need to enable
2585          * power management here */
2586         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2587                 iwl_power_update_mode(priv, false);
2588
2589         /* Enable Rx differential gain and sensitivity calibrations */
2590         iwl_chain_noise_reset(priv);
2591         priv->start_calib = 1;
2592
2593 }
2594
2595 /*****************************************************************************
2596  *
2597  * mac80211 entry point functions
2598  *
2599  *****************************************************************************/
2600
2601 #define UCODE_READY_TIMEOUT     (4 * HZ)
2602
2603 /*
2604  * Not a mac80211 entry point function, but it fits in with all the
2605  * other mac80211 functions grouped here.
2606  */
2607 static int iwl_mac_setup_register(struct iwl_priv *priv)
2608 {
2609         int ret;
2610         struct ieee80211_hw *hw = priv->hw;
2611         hw->rate_control_algorithm = "iwl-agn-rs";
2612
2613         /* Tell mac80211 our characteristics */
2614         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2615                     IEEE80211_HW_NOISE_DBM |
2616                     IEEE80211_HW_AMPDU_AGGREGATION |
2617                     IEEE80211_HW_SPECTRUM_MGMT;
2618
2619         if (!priv->cfg->broken_powersave)
2620                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2621                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2622
2623         if (priv->cfg->sku & IWL_SKU_N)
2624                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2625                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2626
2627         hw->sta_data_size = sizeof(struct iwl_station_priv);
2628         hw->wiphy->interface_modes =
2629                 BIT(NL80211_IFTYPE_STATION) |
2630                 BIT(NL80211_IFTYPE_ADHOC);
2631
2632         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
2633                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
2634
2635         /*
2636          * For now, disable PS by default because it affects
2637          * RX performance significantly.
2638          */
2639         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2640
2641         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX + 1;
2642         /* we create the 802.11 header and a zero-length SSID element */
2643         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2644
2645         /* Default value; 4 EDCA QOS priorities */
2646         hw->queues = 4;
2647
2648         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2649
2650         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2651                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2652                         &priv->bands[IEEE80211_BAND_2GHZ];
2653         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2654                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2655                         &priv->bands[IEEE80211_BAND_5GHZ];
2656
2657         ret = ieee80211_register_hw(priv->hw);
2658         if (ret) {
2659                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2660                 return ret;
2661         }
2662         priv->mac80211_registered = 1;
2663
2664         return 0;
2665 }
2666
2667
2668 static int iwl_mac_start(struct ieee80211_hw *hw)
2669 {
2670         struct iwl_priv *priv = hw->priv;
2671         int ret;
2672
2673         IWL_DEBUG_MAC80211(priv, "enter\n");
2674
2675         /* we should be verifying the device is ready to be opened */
2676         mutex_lock(&priv->mutex);
2677         ret = __iwl_up(priv);
2678         mutex_unlock(&priv->mutex);
2679
2680         if (ret)
2681                 return ret;
2682
2683         if (iwl_is_rfkill(priv))
2684                 goto out;
2685
2686         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2687
2688         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2689          * mac80211 will not be run successfully. */
2690         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2691                         test_bit(STATUS_READY, &priv->status),
2692                         UCODE_READY_TIMEOUT);
2693         if (!ret) {
2694                 if (!test_bit(STATUS_READY, &priv->status)) {
2695                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2696                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2697                         return -ETIMEDOUT;
2698                 }
2699         }
2700
2701         iwl_led_start(priv);
2702
2703 out:
2704         priv->is_open = 1;
2705         IWL_DEBUG_MAC80211(priv, "leave\n");
2706         return 0;
2707 }
2708
2709 static void iwl_mac_stop(struct ieee80211_hw *hw)
2710 {
2711         struct iwl_priv *priv = hw->priv;
2712
2713         IWL_DEBUG_MAC80211(priv, "enter\n");
2714
2715         if (!priv->is_open)
2716                 return;
2717
2718         priv->is_open = 0;
2719
2720         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2721                 /* stop mac, cancel any scan request and clear
2722                  * RXON_FILTER_ASSOC_MSK BIT
2723                  */
2724                 mutex_lock(&priv->mutex);
2725                 iwl_scan_cancel_timeout(priv, 100);
2726                 mutex_unlock(&priv->mutex);
2727         }
2728
2729         iwl_down(priv);
2730
2731         flush_workqueue(priv->workqueue);
2732
2733         /* enable interrupts again in order to receive rfkill changes */
2734         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2735         iwl_enable_interrupts(priv);
2736
2737         IWL_DEBUG_MAC80211(priv, "leave\n");
2738 }
2739
2740 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2741 {
2742         struct iwl_priv *priv = hw->priv;
2743
2744         IWL_DEBUG_MACDUMP(priv, "enter\n");
2745
2746         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2747                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2748
2749         if (iwl_tx_skb(priv, skb))
2750                 dev_kfree_skb_any(skb);
2751
2752         IWL_DEBUG_MACDUMP(priv, "leave\n");
2753         return NETDEV_TX_OK;
2754 }
2755
2756 void iwl_config_ap(struct iwl_priv *priv)
2757 {
2758         int ret = 0;
2759         unsigned long flags;
2760
2761         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2762                 return;
2763
2764         /* The following should be done only at AP bring up */
2765         if (!iwl_is_associated(priv)) {
2766
2767                 /* RXON - unassoc (to set timing command) */
2768                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2769                 iwlcore_commit_rxon(priv);
2770
2771                 /* RXON Timing */
2772                 iwl_setup_rxon_timing(priv);
2773                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2774                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2775                 if (ret)
2776                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2777                                         "Attempting to continue.\n");
2778
2779                 /* AP has all antennas */
2780                 priv->chain_noise_data.active_chains =
2781                         priv->hw_params.valid_rx_ant;
2782                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2783                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2784                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2785
2786                 /* FIXME: what should be the assoc_id for AP? */
2787                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2788                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2789                         priv->staging_rxon.flags |=
2790                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2791                 else
2792                         priv->staging_rxon.flags &=
2793                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2794
2795                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2796                         if (priv->assoc_capability &
2797                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2798                                 priv->staging_rxon.flags |=
2799                                         RXON_FLG_SHORT_SLOT_MSK;
2800                         else
2801                                 priv->staging_rxon.flags &=
2802                                         ~RXON_FLG_SHORT_SLOT_MSK;
2803
2804                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2805                                 priv->staging_rxon.flags &=
2806                                         ~RXON_FLG_SHORT_SLOT_MSK;
2807                 }
2808                 /* restore RXON assoc */
2809                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2810                 iwlcore_commit_rxon(priv);
2811                 iwl_reset_qos(priv);
2812                 spin_lock_irqsave(&priv->lock, flags);
2813                 iwl_activate_qos(priv, 1);
2814                 spin_unlock_irqrestore(&priv->lock, flags);
2815                 iwl_add_bcast_station(priv);
2816         }
2817         iwl_send_beacon_cmd(priv);
2818
2819         /* FIXME - we need to add code here to detect a totally new
2820          * configuration, reset the AP, unassoc, rxon timing, assoc,
2821          * clear sta table, add BCAST sta... */
2822 }
2823
2824 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2825                                     struct ieee80211_vif *vif,
2826                                     struct ieee80211_key_conf *keyconf,
2827                                     struct ieee80211_sta *sta,
2828                                     u32 iv32, u16 *phase1key)
2829 {
2830
2831         struct iwl_priv *priv = hw->priv;
2832         IWL_DEBUG_MAC80211(priv, "enter\n");
2833
2834         iwl_update_tkip_key(priv, keyconf,
2835                             sta ? sta->addr : iwl_bcast_addr,
2836                             iv32, phase1key);
2837
2838         IWL_DEBUG_MAC80211(priv, "leave\n");
2839 }
2840
2841 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2842                            struct ieee80211_vif *vif,
2843                            struct ieee80211_sta *sta,
2844                            struct ieee80211_key_conf *key)
2845 {
2846         struct iwl_priv *priv = hw->priv;
2847         const u8 *addr;
2848         int ret;
2849         u8 sta_id;
2850         bool is_default_wep_key = false;
2851
2852         IWL_DEBUG_MAC80211(priv, "enter\n");
2853
2854         if (priv->cfg->mod_params->sw_crypto) {
2855                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2856                 return -EOPNOTSUPP;
2857         }
2858         addr = sta ? sta->addr : iwl_bcast_addr;
2859         sta_id = iwl_find_station(priv, addr);
2860         if (sta_id == IWL_INVALID_STATION) {
2861                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2862                                    addr);
2863                 return -EINVAL;
2864
2865         }
2866
2867         mutex_lock(&priv->mutex);
2868         iwl_scan_cancel_timeout(priv, 100);
2869
2870         /* If we are getting WEP group key and we didn't receive any key mapping
2871          * so far, we are in legacy wep mode (group key only), otherwise we are
2872          * in 1X mode.
2873          * In legacy wep mode, we use another host command to the uCode */
2874         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2875                 priv->iw_mode != NL80211_IFTYPE_AP) {
2876                 if (cmd == SET_KEY)
2877                         is_default_wep_key = !priv->key_mapping_key;
2878                 else
2879                         is_default_wep_key =
2880                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2881         }
2882
2883         switch (cmd) {
2884         case SET_KEY:
2885                 if (is_default_wep_key)
2886                         ret = iwl_set_default_wep_key(priv, key);
2887                 else
2888                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2889
2890                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2891                 break;
2892         case DISABLE_KEY:
2893                 if (is_default_wep_key)
2894                         ret = iwl_remove_default_wep_key(priv, key);
2895                 else
2896                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2897
2898                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2899                 break;
2900         default:
2901                 ret = -EINVAL;
2902         }
2903
2904         mutex_unlock(&priv->mutex);
2905         IWL_DEBUG_MAC80211(priv, "leave\n");
2906
2907         return ret;
2908 }
2909
2910 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2911                                 struct ieee80211_vif *vif,
2912                              enum ieee80211_ampdu_mlme_action action,
2913                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2914 {
2915         struct iwl_priv *priv = hw->priv;
2916         int ret;
2917
2918         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2919                      sta->addr, tid);
2920
2921         if (!(priv->cfg->sku & IWL_SKU_N))
2922                 return -EACCES;
2923
2924         switch (action) {
2925         case IEEE80211_AMPDU_RX_START:
2926                 IWL_DEBUG_HT(priv, "start Rx\n");
2927                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2928         case IEEE80211_AMPDU_RX_STOP:
2929                 IWL_DEBUG_HT(priv, "stop Rx\n");
2930                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2931                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2932                         return 0;
2933                 else
2934                         return ret;
2935         case IEEE80211_AMPDU_TX_START:
2936                 IWL_DEBUG_HT(priv, "start Tx\n");
2937                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2938         case IEEE80211_AMPDU_TX_STOP:
2939                 IWL_DEBUG_HT(priv, "stop Tx\n");
2940                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2941                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2942                         return 0;
2943                 else
2944                         return ret;
2945         case IEEE80211_AMPDU_TX_OPERATIONAL:
2946                 /* do nothing */
2947                 return -EOPNOTSUPP;
2948         default:
2949                 IWL_DEBUG_HT(priv, "unknown\n");
2950                 return -EINVAL;
2951                 break;
2952         }
2953         return 0;
2954 }
2955
2956 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2957                              struct ieee80211_low_level_stats *stats)
2958 {
2959         struct iwl_priv *priv = hw->priv;
2960
2961         priv = hw->priv;
2962         IWL_DEBUG_MAC80211(priv, "enter\n");
2963         IWL_DEBUG_MAC80211(priv, "leave\n");
2964
2965         return 0;
2966 }
2967
2968 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2969                                struct ieee80211_vif *vif,
2970                                enum sta_notify_cmd cmd,
2971                                struct ieee80211_sta *sta)
2972 {
2973         struct iwl_priv *priv = hw->priv;
2974         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2975         int sta_id;
2976
2977         /*
2978          * TODO: We really should use this callback to
2979          *       actually maintain the station table in
2980          *       the device.
2981          */
2982
2983         switch (cmd) {
2984         case STA_NOTIFY_ADD:
2985                 atomic_set(&sta_priv->pending_frames, 0);
2986                 if (vif->type == NL80211_IFTYPE_AP)
2987                         sta_priv->client = true;
2988                 break;
2989         case STA_NOTIFY_SLEEP:
2990                 WARN_ON(!sta_priv->client);
2991                 sta_priv->asleep = true;
2992                 if (atomic_read(&sta_priv->pending_frames) > 0)
2993                         ieee80211_sta_block_awake(hw, sta, true);
2994                 break;
2995         case STA_NOTIFY_AWAKE:
2996                 WARN_ON(!sta_priv->client);
2997                 if (!sta_priv->asleep)
2998                         break;
2999                 sta_priv->asleep = false;
3000                 sta_id = iwl_find_station(priv, sta->addr);
3001                 if (sta_id != IWL_INVALID_STATION)
3002                         iwl_sta_modify_ps_wake(priv, sta_id);
3003                 break;
3004         default:
3005                 break;
3006         }
3007 }
3008
3009 /*****************************************************************************
3010  *
3011  * sysfs attributes
3012  *
3013  *****************************************************************************/
3014
3015 #ifdef CONFIG_IWLWIFI_DEBUG
3016
3017 /*
3018  * The following adds a new attribute to the sysfs representation
3019  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3020  * used for controlling the debug level.
3021  *
3022  * See the level definitions in iwl for details.
3023  *
3024  * The debug_level being managed using sysfs below is a per device debug
3025  * level that is used instead of the global debug level if it (the per
3026  * device debug level) is set.
3027  */
3028 static ssize_t show_debug_level(struct device *d,
3029                                 struct device_attribute *attr, char *buf)
3030 {
3031         struct iwl_priv *priv = dev_get_drvdata(d);
3032         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3033 }
3034 static ssize_t store_debug_level(struct device *d,
3035                                 struct device_attribute *attr,
3036                                  const char *buf, size_t count)
3037 {
3038         struct iwl_priv *priv = dev_get_drvdata(d);
3039         unsigned long val;
3040         int ret;
3041
3042         ret = strict_strtoul(buf, 0, &val);
3043         if (ret)
3044                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3045         else {
3046                 priv->debug_level = val;
3047                 if (iwl_alloc_traffic_mem(priv))
3048                         IWL_ERR(priv,
3049                                 "Not enough memory to generate traffic log\n");
3050         }
3051         return strnlen(buf, count);
3052 }
3053
3054 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3055                         show_debug_level, store_debug_level);
3056
3057
3058 #endif /* CONFIG_IWLWIFI_DEBUG */
3059
3060
3061 static ssize_t show_temperature(struct device *d,
3062                                 struct device_attribute *attr, char *buf)
3063 {
3064         struct iwl_priv *priv = dev_get_drvdata(d);
3065
3066         if (!iwl_is_alive(priv))
3067                 return -EAGAIN;
3068
3069         return sprintf(buf, "%d\n", priv->temperature);
3070 }
3071
3072 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3073
3074 static ssize_t show_tx_power(struct device *d,
3075                              struct device_attribute *attr, char *buf)
3076 {
3077         struct iwl_priv *priv = dev_get_drvdata(d);
3078
3079         if (!iwl_is_ready_rf(priv))
3080                 return sprintf(buf, "off\n");
3081         else
3082                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3083 }
3084
3085 static ssize_t store_tx_power(struct device *d,
3086                               struct device_attribute *attr,
3087                               const char *buf, size_t count)
3088 {
3089         struct iwl_priv *priv = dev_get_drvdata(d);
3090         unsigned long val;
3091         int ret;
3092
3093         ret = strict_strtoul(buf, 10, &val);
3094         if (ret)
3095                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3096         else {
3097                 ret = iwl_set_tx_power(priv, val, false);
3098                 if (ret)
3099                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
3100                                 ret);
3101                 else
3102                         ret = count;
3103         }
3104         return ret;
3105 }
3106
3107 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3108
3109 static ssize_t show_statistics(struct device *d,
3110                                struct device_attribute *attr, char *buf)
3111 {
3112         struct iwl_priv *priv = dev_get_drvdata(d);
3113         u32 size = sizeof(struct iwl_notif_statistics);
3114         u32 len = 0, ofs = 0;
3115         u8 *data = (u8 *)&priv->statistics;
3116         int rc = 0;
3117
3118         if (!iwl_is_alive(priv))
3119                 return -EAGAIN;
3120
3121         mutex_lock(&priv->mutex);
3122         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3123         mutex_unlock(&priv->mutex);
3124
3125         if (rc) {
3126                 len = sprintf(buf,
3127                               "Error sending statistics request: 0x%08X\n", rc);
3128                 return len;
3129         }
3130
3131         while (size && (PAGE_SIZE - len)) {
3132                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3133                                    PAGE_SIZE - len, 1);
3134                 len = strlen(buf);
3135                 if (PAGE_SIZE - len)
3136                         buf[len++] = '\n';
3137
3138                 ofs += 16;
3139                 size -= min(size, 16U);
3140         }
3141
3142         return len;
3143 }
3144
3145 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3146
3147 static ssize_t show_rts_ht_protection(struct device *d,
3148                              struct device_attribute *attr, char *buf)
3149 {
3150         struct iwl_priv *priv = dev_get_drvdata(d);
3151
3152         return sprintf(buf, "%s\n",
3153                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3154 }
3155
3156 static ssize_t store_rts_ht_protection(struct device *d,
3157                               struct device_attribute *attr,
3158                               const char *buf, size_t count)
3159 {
3160         struct iwl_priv *priv = dev_get_drvdata(d);
3161         unsigned long val;
3162         int ret;
3163
3164         ret = strict_strtoul(buf, 10, &val);
3165         if (ret)
3166                 IWL_INFO(priv, "Input is not in decimal form.\n");
3167         else {
3168                 if (!iwl_is_associated(priv))
3169                         priv->cfg->use_rts_for_ht = val ? true : false;
3170                 else
3171                         IWL_ERR(priv, "Sta associated with AP - "
3172                                 "Change protection mechanism is not allowed\n");
3173                 ret = count;
3174         }
3175         return ret;
3176 }
3177
3178 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3179                         show_rts_ht_protection, store_rts_ht_protection);
3180
3181
3182 /*****************************************************************************
3183  *
3184  * driver setup and teardown
3185  *
3186  *****************************************************************************/
3187
3188 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3189 {
3190         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3191
3192         init_waitqueue_head(&priv->wait_command_queue);
3193
3194         INIT_WORK(&priv->restart, iwl_bg_restart);
3195         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3196         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3197         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3198         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3199         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3200
3201         iwl_setup_scan_deferred_work(priv);
3202
3203         if (priv->cfg->ops->lib->setup_deferred_work)
3204                 priv->cfg->ops->lib->setup_deferred_work(priv);
3205
3206         init_timer(&priv->statistics_periodic);
3207         priv->statistics_periodic.data = (unsigned long)priv;
3208         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3209
3210         init_timer(&priv->ucode_trace);
3211         priv->ucode_trace.data = (unsigned long)priv;
3212         priv->ucode_trace.function = iwl_bg_ucode_trace;
3213
3214         if (!priv->cfg->use_isr_legacy)
3215                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3216                         iwl_irq_tasklet, (unsigned long)priv);
3217         else
3218                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3219                         iwl_irq_tasklet_legacy, (unsigned long)priv);
3220 }
3221
3222 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3223 {
3224         if (priv->cfg->ops->lib->cancel_deferred_work)
3225                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3226
3227         cancel_delayed_work_sync(&priv->init_alive_start);
3228         cancel_delayed_work(&priv->scan_check);
3229         cancel_delayed_work(&priv->alive_start);
3230         cancel_work_sync(&priv->beacon_update);
3231         del_timer_sync(&priv->statistics_periodic);
3232         del_timer_sync(&priv->ucode_trace);
3233 }
3234
3235 static void iwl_init_hw_rates(struct iwl_priv *priv,
3236                               struct ieee80211_rate *rates)
3237 {
3238         int i;
3239
3240         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3241                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3242                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3243                 rates[i].hw_value_short = i;
3244                 rates[i].flags = 0;
3245                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3246                         /*
3247                          * If CCK != 1M then set short preamble rate flag.
3248                          */
3249                         rates[i].flags |=
3250                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3251                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3252                 }
3253         }
3254 }
3255
3256 static int iwl_init_drv(struct iwl_priv *priv)
3257 {
3258         int ret;
3259
3260         priv->ibss_beacon = NULL;
3261
3262         spin_lock_init(&priv->sta_lock);
3263         spin_lock_init(&priv->hcmd_lock);
3264
3265         INIT_LIST_HEAD(&priv->free_frames);
3266
3267         mutex_init(&priv->mutex);
3268         mutex_init(&priv->sync_cmd_mutex);
3269
3270         priv->ieee_channels = NULL;
3271         priv->ieee_rates = NULL;
3272         priv->band = IEEE80211_BAND_2GHZ;
3273
3274         priv->iw_mode = NL80211_IFTYPE_STATION;
3275         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3276         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3277
3278         /* initialize force reset */
3279         priv->force_reset[IWL_RF_RESET].reset_duration =
3280                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3281         priv->force_reset[IWL_FW_RESET].reset_duration =
3282                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3283
3284         /* Choose which receivers/antennas to use */
3285         if (priv->cfg->ops->hcmd->set_rxon_chain)
3286                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3287
3288         iwl_init_scan_params(priv);
3289
3290         iwl_reset_qos(priv);
3291
3292         priv->qos_data.qos_active = 0;
3293         priv->qos_data.qos_cap.val = 0;
3294
3295         /* Set the tx_power_user_lmt to the lowest power level
3296          * this value will get overwritten by channel max power avg
3297          * from eeprom */
3298         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
3299
3300         ret = iwl_init_channel_map(priv);
3301         if (ret) {
3302                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3303                 goto err;
3304         }
3305
3306         ret = iwlcore_init_geos(priv);
3307         if (ret) {
3308                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3309                 goto err_free_channel_map;
3310         }
3311         iwl_init_hw_rates(priv, priv->ieee_rates);
3312
3313         return 0;
3314
3315 err_free_channel_map:
3316         iwl_free_channel_map(priv);
3317 err:
3318         return ret;
3319 }
3320
3321 static void iwl_uninit_drv(struct iwl_priv *priv)
3322 {
3323         iwl_calib_free_results(priv);
3324         iwlcore_free_geos(priv);
3325         iwl_free_channel_map(priv);
3326         kfree(priv->scan);
3327 }
3328
3329 static struct attribute *iwl_sysfs_entries[] = {
3330         &dev_attr_statistics.attr,
3331         &dev_attr_temperature.attr,
3332         &dev_attr_tx_power.attr,
3333         &dev_attr_rts_ht_protection.attr,
3334 #ifdef CONFIG_IWLWIFI_DEBUG
3335         &dev_attr_debug_level.attr,
3336 #endif
3337         NULL
3338 };
3339
3340 static struct attribute_group iwl_attribute_group = {
3341         .name = NULL,           /* put in device directory */
3342         .attrs = iwl_sysfs_entries,
3343 };
3344
3345 static struct ieee80211_ops iwl_hw_ops = {
3346         .tx = iwl_mac_tx,
3347         .start = iwl_mac_start,
3348         .stop = iwl_mac_stop,
3349         .add_interface = iwl_mac_add_interface,
3350         .remove_interface = iwl_mac_remove_interface,
3351         .config = iwl_mac_config,
3352         .configure_filter = iwl_configure_filter,
3353         .set_key = iwl_mac_set_key,
3354         .update_tkip_key = iwl_mac_update_tkip_key,
3355         .get_stats = iwl_mac_get_stats,
3356         .conf_tx = iwl_mac_conf_tx,
3357         .reset_tsf = iwl_mac_reset_tsf,
3358         .bss_info_changed = iwl_bss_info_changed,
3359         .ampdu_action = iwl_mac_ampdu_action,
3360         .hw_scan = iwl_mac_hw_scan,
3361         .sta_notify = iwl_mac_sta_notify,
3362 };
3363
3364 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3365 {
3366         int err = 0;
3367         struct iwl_priv *priv;
3368         struct ieee80211_hw *hw;
3369         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3370         unsigned long flags;
3371         u16 pci_cmd;
3372
3373         /************************
3374          * 1. Allocating HW data
3375          ************************/
3376
3377         /* Disabling hardware scan means that mac80211 will perform scans
3378          * "the hard way", rather than using device's scan. */
3379         if (cfg->mod_params->disable_hw_scan) {
3380                 if (iwl_debug_level & IWL_DL_INFO)
3381                         dev_printk(KERN_DEBUG, &(pdev->dev),
3382                                    "Disabling hw_scan\n");
3383                 iwl_hw_ops.hw_scan = NULL;
3384         }
3385
3386         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3387         if (!hw) {
3388                 err = -ENOMEM;
3389                 goto out;
3390         }
3391         priv = hw->priv;
3392         /* At this point both hw and priv are allocated. */
3393
3394         SET_IEEE80211_DEV(hw, &pdev->dev);
3395
3396         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3397         priv->cfg = cfg;
3398         priv->pci_dev = pdev;
3399         priv->inta_mask = CSR_INI_SET_MASK;
3400
3401 #ifdef CONFIG_IWLWIFI_DEBUG
3402         atomic_set(&priv->restrict_refcnt, 0);
3403 #endif
3404         if (iwl_alloc_traffic_mem(priv))
3405                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3406
3407         /**************************
3408          * 2. Initializing PCI bus
3409          **************************/
3410         if (pci_enable_device(pdev)) {
3411                 err = -ENODEV;
3412                 goto out_ieee80211_free_hw;
3413         }
3414
3415         pci_set_master(pdev);
3416
3417         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3418         if (!err)
3419                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3420         if (err) {
3421                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3422                 if (!err)
3423                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3424                 /* both attempts failed: */
3425                 if (err) {
3426                         IWL_WARN(priv, "No suitable DMA available.\n");
3427                         goto out_pci_disable_device;
3428                 }
3429         }
3430
3431         err = pci_request_regions(pdev, DRV_NAME);
3432         if (err)
3433                 goto out_pci_disable_device;
3434
3435         pci_set_drvdata(pdev, priv);
3436
3437
3438         /***********************
3439          * 3. Read REV register
3440          ***********************/
3441         priv->hw_base = pci_iomap(pdev, 0, 0);
3442         if (!priv->hw_base) {
3443                 err = -ENODEV;
3444                 goto out_pci_release_regions;
3445         }
3446
3447         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3448                 (unsigned long long) pci_resource_len(pdev, 0));
3449         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3450
3451         /* these spin locks will be used in apm_ops.init and EEPROM access
3452          * we should init now
3453          */
3454         spin_lock_init(&priv->reg_lock);
3455         spin_lock_init(&priv->lock);
3456
3457         /*
3458          * stop and reset the on-board processor just in case it is in a
3459          * strange state ... like being left stranded by a primary kernel
3460          * and this is now the kdump kernel trying to start up
3461          */
3462         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3463
3464         iwl_hw_detect(priv);
3465         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3466                 priv->cfg->name, priv->hw_rev);
3467
3468         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3469          * PCI Tx retries from interfering with C3 CPU state */
3470         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3471
3472         iwl_prepare_card_hw(priv);
3473         if (!priv->hw_ready) {
3474                 IWL_WARN(priv, "Failed, HW not ready\n");
3475                 goto out_iounmap;
3476         }
3477
3478         /*****************
3479          * 4. Read EEPROM
3480          *****************/
3481         /* Read the EEPROM */
3482         err = iwl_eeprom_init(priv);
3483         if (err) {
3484                 IWL_ERR(priv, "Unable to init EEPROM\n");
3485                 goto out_iounmap;
3486         }
3487         err = iwl_eeprom_check_version(priv);
3488         if (err)
3489                 goto out_free_eeprom;
3490
3491         /* extract MAC Address */
3492         iwl_eeprom_get_mac(priv, priv->mac_addr);
3493         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3494         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3495
3496         /************************
3497          * 5. Setup HW constants
3498          ************************/
3499         if (iwl_set_hw_params(priv)) {
3500                 IWL_ERR(priv, "failed to set hw parameters\n");
3501                 goto out_free_eeprom;
3502         }
3503
3504         /*******************
3505          * 6. Setup priv
3506          *******************/
3507
3508         err = iwl_init_drv(priv);
3509         if (err)
3510                 goto out_free_eeprom;
3511         /* At this point both hw and priv are initialized. */
3512
3513         /********************
3514          * 7. Setup services
3515          ********************/
3516         spin_lock_irqsave(&priv->lock, flags);
3517         iwl_disable_interrupts(priv);
3518         spin_unlock_irqrestore(&priv->lock, flags);
3519
3520         pci_enable_msi(priv->pci_dev);
3521
3522         iwl_alloc_isr_ict(priv);
3523         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3524                           IRQF_SHARED, DRV_NAME, priv);
3525         if (err) {
3526                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3527                 goto out_disable_msi;
3528         }
3529         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3530         if (err) {
3531                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3532                 goto out_free_irq;
3533         }
3534
3535         iwl_setup_deferred_work(priv);
3536         iwl_setup_rx_handlers(priv);
3537
3538         /*********************************************
3539          * 8. Enable interrupts and read RFKILL state
3540          *********************************************/
3541
3542         /* enable interrupts if needed: hw bug w/a */
3543         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3544         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3545                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3546                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3547         }
3548
3549         iwl_enable_interrupts(priv);
3550
3551         /* If platform's RF_KILL switch is NOT set to KILL */
3552         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3553                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3554         else
3555                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3556
3557         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3558                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3559
3560         iwl_power_initialize(priv);
3561         iwl_tt_initialize(priv);
3562
3563         err = iwl_request_firmware(priv, true);
3564         if (err)
3565                 goto out_remove_sysfs;
3566
3567         return 0;
3568
3569  out_remove_sysfs:
3570         destroy_workqueue(priv->workqueue);
3571         priv->workqueue = NULL;
3572         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3573  out_free_irq:
3574         free_irq(priv->pci_dev->irq, priv);
3575         iwl_free_isr_ict(priv);
3576  out_disable_msi:
3577         pci_disable_msi(priv->pci_dev);
3578         iwl_uninit_drv(priv);
3579  out_free_eeprom:
3580         iwl_eeprom_free(priv);
3581  out_iounmap:
3582         pci_iounmap(pdev, priv->hw_base);
3583  out_pci_release_regions:
3584         pci_set_drvdata(pdev, NULL);
3585         pci_release_regions(pdev);
3586  out_pci_disable_device:
3587         pci_disable_device(pdev);
3588  out_ieee80211_free_hw:
3589         iwl_free_traffic_mem(priv);
3590         ieee80211_free_hw(priv->hw);
3591  out:
3592         return err;
3593 }
3594
3595 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3596 {
3597         struct iwl_priv *priv = pci_get_drvdata(pdev);
3598         unsigned long flags;
3599
3600         if (!priv)
3601                 return;
3602
3603         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3604
3605         iwl_dbgfs_unregister(priv);
3606         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3607
3608         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3609          * to be called and iwl_down since we are removing the device
3610          * we need to set STATUS_EXIT_PENDING bit.
3611          */
3612         set_bit(STATUS_EXIT_PENDING, &priv->status);
3613         if (priv->mac80211_registered) {
3614                 ieee80211_unregister_hw(priv->hw);
3615                 priv->mac80211_registered = 0;
3616         } else {
3617                 iwl_down(priv);
3618         }
3619
3620         /*
3621          * Make sure device is reset to low power before unloading driver.
3622          * This may be redundant with iwl_down(), but there are paths to
3623          * run iwl_down() without calling apm_ops.stop(), and there are
3624          * paths to avoid running iwl_down() at all before leaving driver.
3625          * This (inexpensive) call *makes sure* device is reset.
3626          */
3627         priv->cfg->ops->lib->apm_ops.stop(priv);
3628
3629         iwl_tt_exit(priv);
3630
3631         /* make sure we flush any pending irq or
3632          * tasklet for the driver
3633          */
3634         spin_lock_irqsave(&priv->lock, flags);
3635         iwl_disable_interrupts(priv);
3636         spin_unlock_irqrestore(&priv->lock, flags);
3637
3638         iwl_synchronize_irq(priv);
3639
3640         iwl_dealloc_ucode_pci(priv);
3641
3642         if (priv->rxq.bd)
3643                 iwl_rx_queue_free(priv, &priv->rxq);
3644         iwl_hw_txq_ctx_free(priv);
3645
3646         iwl_eeprom_free(priv);
3647
3648
3649         /*netif_stop_queue(dev); */
3650         flush_workqueue(priv->workqueue);
3651
3652         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3653          * priv->workqueue... so we can't take down the workqueue
3654          * until now... */
3655         destroy_workqueue(priv->workqueue);
3656         priv->workqueue = NULL;
3657         iwl_free_traffic_mem(priv);
3658
3659         free_irq(priv->pci_dev->irq, priv);
3660         pci_disable_msi(priv->pci_dev);
3661         pci_iounmap(pdev, priv->hw_base);
3662         pci_release_regions(pdev);
3663         pci_disable_device(pdev);
3664         pci_set_drvdata(pdev, NULL);
3665
3666         iwl_uninit_drv(priv);
3667
3668         iwl_free_isr_ict(priv);
3669
3670         if (priv->ibss_beacon)
3671                 dev_kfree_skb(priv->ibss_beacon);
3672
3673         ieee80211_free_hw(priv->hw);
3674 }
3675
3676
3677 /*****************************************************************************
3678  *
3679  * driver and module entry point
3680  *
3681  *****************************************************************************/
3682
3683 /* Hardware specific file defines the PCI IDs table for that hardware module */
3684 static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
3685 #ifdef CONFIG_IWL4965
3686         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3687         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3688 #endif /* CONFIG_IWL4965 */
3689 #ifdef CONFIG_IWL5000
3690 /* 5100 Series WiFi */
3691         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
3692         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
3693         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
3694         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
3695         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
3696         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
3697         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
3698         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
3699         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
3700         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
3701         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
3702         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
3703         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
3704         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
3705         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
3706         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
3707         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
3708         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
3709         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
3710         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
3711         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
3712         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
3713         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
3714         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
3715
3716 /* 5300 Series WiFi */
3717         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
3718         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
3719         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
3720         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
3721         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
3722         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
3723         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
3724         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
3725         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
3726         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
3727         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
3728         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
3729
3730 /* 5350 Series WiFi/WiMax */
3731         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
3732         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
3733         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
3734
3735 /* 5150 Series Wifi/WiMax */
3736         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
3737         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
3738         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
3739         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
3740         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
3741         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
3742
3743         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
3744         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
3745         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
3746         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
3747
3748 /* 6x00 Series */
3749         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3750         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3751         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3752         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3753         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3754         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3755         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3756         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3757         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3758         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3759
3760 /* 6x50 WiFi/WiMax Series */
3761         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3762         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3763         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3764         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3765         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3766         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3767
3768 /* 1000 Series WiFi */
3769         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3770         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3771         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3772         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3773         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3774         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3775         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3776         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3777         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3778         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3779         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3780         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3781 #endif /* CONFIG_IWL5000 */
3782
3783         {0}
3784 };
3785 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3786
3787 static struct pci_driver iwl_driver = {
3788         .name = DRV_NAME,
3789         .id_table = iwl_hw_card_ids,
3790         .probe = iwl_pci_probe,
3791         .remove = __devexit_p(iwl_pci_remove),
3792 #ifdef CONFIG_PM
3793         .suspend = iwl_pci_suspend,
3794         .resume = iwl_pci_resume,
3795 #endif
3796 };
3797
3798 static int __init iwl_init(void)
3799 {
3800
3801         int ret;
3802         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3803         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3804
3805         ret = iwlagn_rate_control_register();
3806         if (ret) {
3807                 printk(KERN_ERR DRV_NAME
3808                        "Unable to register rate control algorithm: %d\n", ret);
3809                 return ret;
3810         }
3811
3812         ret = pci_register_driver(&iwl_driver);
3813         if (ret) {
3814                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3815                 goto error_register;
3816         }
3817
3818         return ret;
3819
3820 error_register:
3821         iwlagn_rate_control_unregister();
3822         return ret;
3823 }
3824
3825 static void __exit iwl_exit(void)
3826 {
3827         pci_unregister_driver(&iwl_driver);
3828         iwlagn_rate_control_unregister();
3829 }
3830
3831 module_exit(iwl_exit);
3832 module_init(iwl_init);
3833
3834 #ifdef CONFIG_IWLWIFI_DEBUG
3835 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3836 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3837 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3838 MODULE_PARM_DESC(debug, "debug output mask");
3839 #endif
3840