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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #define DRV_NAME        "iwlagn"
  48
  49 #include "iwl-eeprom.h"
  50 #include "iwl-dev.h"
  51 #include "iwl-core.h"
  52 #include "iwl-io.h"
  53 #include "iwl-helpers.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-calib.h"
  56
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  76 #define VS "s"
  77 #else
  78 #define VS
  79 #endif
  80
  81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("iwl4965");
  89
  90 /*************** STATION TABLE MANAGEMENT ****
  91  * mac80211 should be examined to determine if sta_info is duplicating
  92  * the functionality provided here
  93  */
  94
  95 /**************************************************************/
  96
  97 /**
  98  * iwl_commit_rxon - commit staging_rxon to hardware
  99  *
 100  * The RXON command in staging_rxon is committed to the hardware and
 101  * the active_rxon structure is updated with the new data.  This
 102  * function correctly transitions out of the RXON_ASSOC_MSK state if
 103  * a HW tune is required based on the RXON structure changes.
 104  */
 105 int iwl_commit_rxon(struct iwl_priv *priv)
 106 {
 107         /* cast away the const for active_rxon in this function */
 108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 109         int ret;
 110         bool new_assoc =
 111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 112
 113         if (!iwl_is_alive(priv))
 114                 return -EBUSY;
 115
 116         /* always get timestamp with Rx frame */
 117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 118
 119         ret = iwl_check_rxon_cmd(priv);
 120         if (ret) {
 121                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 122                 return -EINVAL;
 123         }
 124
 125         /*
 126          * receive commit_rxon request
 127          * abort any previous channel switch if still in process
 128          */
 129         if (priv->switch_rxon.switch_in_progress &&
 130             (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
 131                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 132                       le16_to_cpu(priv->switch_rxon.channel));
 133                 priv->switch_rxon.switch_in_progress = false;
 134         }
 135
 136         /* If we don't need to send a full RXON, we can use
 137          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 138          * and other flags for the current radio configuration. */
 139         if (!iwl_full_rxon_required(priv)) {
 140                 ret = iwl_send_rxon_assoc(priv);
 141                 if (ret) {
 142                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 143                         return ret;
 144                 }
 145
 146                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 147                 iwl_print_rx_config_cmd(priv);
 148                 return 0;
 149         }
 150
 151         /* station table will be cleared */
 152         priv->assoc_station_added = 0;
 153
 154         /* If we are currently associated and the new config requires
 155          * an RXON_ASSOC and the new config wants the associated mask enabled,
 156          * we must clear the associated from the active configuration
 157          * before we apply the new config */
 158         if (iwl_is_associated(priv) && new_assoc) {
 159                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 160                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 161
 162                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 163                                       sizeof(struct iwl_rxon_cmd),
 164                                       &priv->active_rxon);
 165
 166                 /* If the mask clearing failed then we set
 167                  * active_rxon back to what it was previously */
 168                 if (ret) {
 169                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 170                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 171                         return ret;
 172                 }
 173         }
 174
 175         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 176                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 177                        "* channel = %d\n"
 178                        "* bssid = %pM\n",
 179                        (new_assoc ? "" : "out"),
 180                        le16_to_cpu(priv->staging_rxon.channel),
 181                        priv->staging_rxon.bssid_addr);
 182
 183         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 184
 185         /* Apply the new configuration
 186          * RXON unassoc clears the station table in uCode, send it before
 187          * we add the bcast station. If assoc bit is set, we will send RXON
 188          * after having added the bcast and bssid station.
 189          */
 190         if (!new_assoc) {
 191                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 192                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 193                 if (ret) {
 194                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 195                         return ret;
 196                 }
 197                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 198         }
 199
 200         iwl_clear_stations_table(priv);
 201
 202         priv->start_calib = 0;
 203
 204         /* Add the broadcast address so we can send broadcast frames */
 205         iwl_add_bcast_station(priv);
 206
 207         /* If we have set the ASSOC_MSK and we are in BSS mode then
 208          * add the IWL_AP_ID to the station rate table */
 209         if (new_assoc) {
 210                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 211                         ret = iwl_rxon_add_station(priv,
 212                                            priv->active_rxon.bssid_addr, 1);
 213                         if (ret == IWL_INVALID_STATION) {
 214                                 IWL_ERR(priv,
 215                                         "Error adding AP address for TX.\n");
 216                                 return -EIO;
 217                         }
 218                         priv->assoc_station_added = 1;
 219                         if (priv->default_wep_key &&
 220                             iwl_send_static_wepkey_cmd(priv, 0))
 221                                 IWL_ERR(priv,
 222                                         "Could not send WEP static key.\n");
 223                 }
 224
 225                 /*
 226                  * allow CTS-to-self if possible for new association.
 227                  * this is relevant only for 5000 series and up,
 228                  * but will not damage 4965
 229                  */
 230                 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 231
 232                 /* Apply the new configuration
 233                  * RXON assoc doesn't clear the station table in uCode,
 234                  */
 235                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 236                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 237                 if (ret) {
 238                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 239                         return ret;
 240                 }
 241                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 242         }
 243         iwl_print_rx_config_cmd(priv);
 244
 245         iwl_init_sensitivity(priv);
 246
 247         /* If we issue a new RXON command which required a tune then we must
 248          * send a new TXPOWER command or we won't be able to Tx any frames */
 249         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 250         if (ret) {
 251                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 252                 return ret;
 253         }
 254
 255         return 0;
 256 }
 257
 258 void iwl_update_chain_flags(struct iwl_priv *priv)
 259 {
 260
 261         if (priv->cfg->ops->hcmd->set_rxon_chain)
 262                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 263         iwlcore_commit_rxon(priv);
 264 }
 265
 266 static void iwl_clear_free_frames(struct iwl_priv *priv)
 267 {
 268         struct list_head *element;
 269
 270         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 271                        priv->frames_count);
 272
 273         while (!list_empty(&priv->free_frames)) {
 274                 element = priv->free_frames.next;
 275                 list_del(element);
 276                 kfree(list_entry(element, struct iwl_frame, list));
 277                 priv->frames_count--;
 278         }
 279
 280         if (priv->frames_count) {
 281                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 282                             priv->frames_count);
 283                 priv->frames_count = 0;
 284         }
 285 }
 286
 287 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 288 {
 289         struct iwl_frame *frame;
 290         struct list_head *element;
 291         if (list_empty(&priv->free_frames)) {
 292                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 293                 if (!frame) {
 294                         IWL_ERR(priv, "Could not allocate frame!\n");
 295                         return NULL;
 296                 }
 297
 298                 priv->frames_count++;
 299                 return frame;
 300         }
 301
 302         element = priv->free_frames.next;
 303         list_del(element);
 304         return list_entry(element, struct iwl_frame, list);
 305 }
 306
 307 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 308 {
 309         memset(frame, 0, sizeof(*frame));
 310         list_add(&frame->list, &priv->free_frames);
 311 }
 312
 313 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
 314                                           struct ieee80211_hdr *hdr,
 315                                           int left)
 316 {
 317         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 318             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 319              (priv->iw_mode != NL80211_IFTYPE_AP)))
 320                 return 0;
 321
 322         if (priv->ibss_beacon->len > left)
 323                 return 0;
 324
 325         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 326
 327         return priv->ibss_beacon->len;
 328 }
 329
 330 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 331 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 332                 struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 333                 u8 *beacon, u32 frame_size)
 334 {
 335         u16 tim_idx;
 336         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 337
 338         /*
 339          * The index is relative to frame start but we start looking at the
 340          * variable-length part of the beacon.
 341          */
 342         tim_idx = mgmt->u.beacon.variable - beacon;
 343
 344         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 345         while ((tim_idx < (frame_size - 2)) &&
 346                         (beacon[tim_idx] != WLAN_EID_TIM))
 347                 tim_idx += beacon[tim_idx+1] + 2;
 348
 349         /* If TIM field was found, set variables */
 350         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 351                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 352                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 353         } else
 354                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 355 }
 356
 357 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 358                                        struct iwl_frame *frame)
 359 {
 360         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 361         u32 frame_size;
 362         u32 rate_flags;
 363         u32 rate;
 364         /*
 365          * We have to set up the TX command, the TX Beacon command, and the
 366          * beacon contents.
 367          */
 368
 369         /* Initialize memory */
 370         tx_beacon_cmd = &frame->u.beacon;
 371         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 372
 373         /* Set up TX beacon contents */
 374         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 375                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 376         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
 377                 return 0;
 378
 379         /* Set up TX command fields */
 380         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 381         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 382         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 383         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 384                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 385
 386         /* Set up TX beacon command fields */
 387         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
 388                         frame_size);
 389
 390         /* Set up packet rate and flags */
 391         rate = iwl_rate_get_lowest_plcp(priv);
 392         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant);
 393         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 394         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
 395                 rate_flags |= RATE_MCS_CCK_MSK;
 396         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
 397                         rate_flags);
 398
 399         return sizeof(*tx_beacon_cmd) + frame_size;
 400 }
 401 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 402 {
 403         struct iwl_frame *frame;
 404         unsigned int frame_size;
 405         int rc;
 406
 407         frame = iwl_get_free_frame(priv);
 408         if (!frame) {
 409                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 410                           "command.\n");
 411                 return -ENOMEM;
 412         }
 413
 414         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
 415         if (!frame_size) {
 416                 IWL_ERR(priv, "Error configuring the beacon command\n");
 417                 iwl_free_frame(priv, frame);
 418                 return -EINVAL;
 419         }
 420
 421         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 422                               &frame->u.cmd[0]);
 423
 424         iwl_free_frame(priv, frame);
 425
 426         return rc;
 427 }
 428
 429 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 430 {
 431         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 432
 433         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 434         if (sizeof(dma_addr_t) > sizeof(u32))
 435                 addr |=
 436                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 437
 438         return addr;
 439 }
 440
 441 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 442 {
 443         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 444
 445         return le16_to_cpu(tb->hi_n_len) >> 4;
 446 }
 447
 448 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 449                                   dma_addr_t addr, u16 len)
 450 {
 451         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 452         u16 hi_n_len = len << 4;
 453
 454         put_unaligned_le32(addr, &tb->lo);
 455         if (sizeof(dma_addr_t) > sizeof(u32))
 456                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 457
 458         tb->hi_n_len = cpu_to_le16(hi_n_len);
 459
 460         tfd->num_tbs = idx + 1;
 461 }
 462
 463 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 464 {
 465         return tfd->num_tbs & 0x1f;
 466 }
 467
 468 /**
 469  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 470  * @priv - driver private data
 471  * @txq - tx queue
 472  *
 473  * Does NOT advance any TFD circular buffer read/write indexes
 474  * Does NOT free the TFD itself (which is within circular buffer)
 475  */
 476 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 477 {
 478         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 479         struct iwl_tfd *tfd;
 480         struct pci_dev *dev = priv->pci_dev;
 481         int index = txq->q.read_ptr;
 482         int i;
 483         int num_tbs;
 484
 485         tfd = &tfd_tmp[index];
 486
 487         /* Sanity check on number of chunks */
 488         num_tbs = iwl_tfd_get_num_tbs(tfd);
 489
 490         if (num_tbs >= IWL_NUM_OF_TBS) {
 491                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 492                 /* @todo issue fatal error, it is quite serious situation */
 493                 return;
 494         }
 495
 496         /* Unmap tx_cmd */
 497         if (num_tbs)
 498                 pci_unmap_single(dev,
 499                                 pci_unmap_addr(&txq->meta[index], mapping),
 500                                 pci_unmap_len(&txq->meta[index], len),
 501                                 PCI_DMA_BIDIRECTIONAL);
 502
 503         /* Unmap chunks, if any. */
 504         for (i = 1; i < num_tbs; i++) {
 505                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 506                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 507
 508                 if (txq->txb) {
 509                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 510                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 511                 }
 512         }
 513 }
 514
 515 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 516                                  struct iwl_tx_queue *txq,
 517                                  dma_addr_t addr, u16 len,
 518                                  u8 reset, u8 pad)
 519 {
 520         struct iwl_queue *q;
 521         struct iwl_tfd *tfd, *tfd_tmp;
 522         u32 num_tbs;
 523
 524         q = &txq->q;
 525         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 526         tfd = &tfd_tmp[q->write_ptr];
 527
 528         if (reset)
 529                 memset(tfd, 0, sizeof(*tfd));
 530
 531         num_tbs = iwl_tfd_get_num_tbs(tfd);
 532
 533         /* Each TFD can point to a maximum 20 Tx buffers */
 534         if (num_tbs >= IWL_NUM_OF_TBS) {
 535                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 536                           IWL_NUM_OF_TBS);
 537                 return -EINVAL;
 538         }
 539
 540         BUG_ON(addr & ~DMA_BIT_MASK(36));
 541         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 542                 IWL_ERR(priv, "Unaligned address = %llx\n",
 543                           (unsigned long long)addr);
 544
 545         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 546
 547         return 0;
 548 }
 549
 550 /*
 551  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 552  * given Tx queue, and enable the DMA channel used for that queue.
 553  *
 554  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 555  * channels supported in hardware.
 556  */
 557 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 558                          struct iwl_tx_queue *txq)
 559 {
 560         int txq_id = txq->q.id;
 561
 562         /* Circular buffer (TFD queue in DRAM) physical base address */
 563         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 564                              txq->q.dma_addr >> 8);
 565
 566         return 0;
 567 }
 568
 569 /******************************************************************************
 570  *
 571  * Generic RX handler implementations
 572  *
 573  ******************************************************************************/
 574 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 575                                 struct iwl_rx_mem_buffer *rxb)
 576 {
 577         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 578         struct iwl_alive_resp *palive;
 579         struct delayed_work *pwork;
 580
 581         palive = &pkt->u.alive_frame;
 582
 583         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 584                        "0x%01X 0x%01X\n",
 585                        palive->is_valid, palive->ver_type,
 586                        palive->ver_subtype);
 587
 588         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 589                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 590                 memcpy(&priv->card_alive_init,
 591                        &pkt->u.alive_frame,
 592                        sizeof(struct iwl_init_alive_resp));
 593                 pwork = &priv->init_alive_start;
 594         } else {
 595                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 596                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 597                        sizeof(struct iwl_alive_resp));
 598                 pwork = &priv->alive_start;
 599         }
 600
 601         /* We delay the ALIVE response by 5ms to
 602          * give the HW RF Kill time to activate... */
 603         if (palive->is_valid == UCODE_VALID_OK)
 604                 queue_delayed_work(priv->workqueue, pwork,
 605                                    msecs_to_jiffies(5));
 606         else
 607                 IWL_WARN(priv, "uCode did not respond OK.\n");
 608 }
 609
 610 static void iwl_bg_beacon_update(struct work_struct *work)
 611 {
 612         struct iwl_priv *priv =
 613                 container_of(work, struct iwl_priv, beacon_update);
 614         struct sk_buff *beacon;
 615
 616         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 617         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 618
 619         if (!beacon) {
 620                 IWL_ERR(priv, "update beacon failed\n");
 621                 return;
 622         }
 623
 624         mutex_lock(&priv->mutex);
 625         /* new beacon skb is allocated every time; dispose previous.*/
 626         if (priv->ibss_beacon)
 627                 dev_kfree_skb(priv->ibss_beacon);
 628
 629         priv->ibss_beacon = beacon;
 630         mutex_unlock(&priv->mutex);
 631
 632         iwl_send_beacon_cmd(priv);
 633 }
 634
 635 /**
 636  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 637  *
 638  * This callback is provided in order to send a statistics request.
 639  *
 640  * This timer function is continually reset to execute within
 641  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 642  * was received.  We need to ensure we receive the statistics in order
 643  * to update the temperature used for calibrating the TXPOWER.
 644  */
 645 static void iwl_bg_statistics_periodic(unsigned long data)
 646 {
 647         struct iwl_priv *priv = (struct iwl_priv *)data;
 648
 649         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 650                 return;
 651
 652         /* dont send host command if rf-kill is on */
 653         if (!iwl_is_ready_rf(priv))
 654                 return;
 655
 656         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 657 }
 658
 659 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 660                                 struct iwl_rx_mem_buffer *rxb)
 661 {
 662 #ifdef CONFIG_IWLWIFI_DEBUG
 663         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 664         struct iwl4965_beacon_notif *beacon =
 665                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 666         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 667
 668         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 669                 "tsf %d %d rate %d\n",
 670                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 671                 beacon->beacon_notify_hdr.failure_frame,
 672                 le32_to_cpu(beacon->ibss_mgr_status),
 673                 le32_to_cpu(beacon->high_tsf),
 674                 le32_to_cpu(beacon->low_tsf), rate);
 675 #endif
 676
 677         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 678             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 679                 queue_work(priv->workqueue, &priv->beacon_update);
 680 }
 681
 682 /* Handle notification from uCode that card's power state is changing
 683  * due to software, hardware, or critical temperature RFKILL */
 684 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 685                                     struct iwl_rx_mem_buffer *rxb)
 686 {
 687         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 688         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 689         unsigned long status = priv->status;
 690
 691         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 692                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 693                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 694
 695         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 696                      RF_CARD_DISABLED)) {
 697
 698                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 699                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 700
 701                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 702                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 703
 704                 if (!(flags & RXON_CARD_DISABLED)) {
 705                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 706                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 707                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 708                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 709                 }
 710                 if (flags & RF_CARD_DISABLED)
 711                         iwl_tt_enter_ct_kill(priv);
 712         }
 713         if (!(flags & RF_CARD_DISABLED))
 714                 iwl_tt_exit_ct_kill(priv);
 715
 716         if (flags & HW_CARD_DISABLED)
 717                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 718         else
 719                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 720
 721
 722         if (!(flags & RXON_CARD_DISABLED))
 723                 iwl_scan_cancel(priv);
 724
 725         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 726              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 727                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 728                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 729         else
 730                 wake_up_interruptible(&priv->wait_command_queue);
 731 }
 732
 733 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 734 {
 735         if (src == IWL_PWR_SRC_VAUX) {
 736                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 737                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 738                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 739                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 740         } else {
 741                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 742                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 743                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 744         }
 745
 746         return 0;
 747 }
 748
 749 /**
 750  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 751  *
 752  * Setup the RX handlers for each of the reply types sent from the uCode
 753  * to the host.
 754  *
 755  * This function chains into the hardware specific files for them to setup
 756  * any hardware specific handlers as well.
 757  */
 758 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 759 {
 760         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 761         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 762         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 763         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 764         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 765             iwl_rx_pm_debug_statistics_notif;
 766         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 767
 768         /*
 769          * The same handler is used for both the REPLY to a discrete
 770          * statistics request from the host as well as for the periodic
 771          * statistics notifications (after received beacons) from the uCode.
 772          */
 773         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
 774         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 775
 776         iwl_setup_spectrum_handlers(priv);
 777         iwl_setup_rx_scan_handlers(priv);
 778
 779         /* status change handler */
 780         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 781
 782         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 783             iwl_rx_missed_beacon_notif;
 784         /* Rx handlers */
 785         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 786         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 787         /* block ack */
 788         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 789         /* Set up hardware specific Rx handlers */
 790         priv->cfg->ops->lib->rx_handler_setup(priv);
 791 }
 792
 793 /**
 794  * iwl_rx_handle - Main entry function for receiving responses from uCode
 795  *
 796  * Uses the priv->rx_handlers callback function array to invoke
 797  * the appropriate handlers, including command responses,
 798  * frame-received notifications, and other notifications.
 799  */
 800 void iwl_rx_handle(struct iwl_priv *priv)
 801 {
 802         struct iwl_rx_mem_buffer *rxb;
 803         struct iwl_rx_packet *pkt;
 804         struct iwl_rx_queue *rxq = &priv->rxq;
 805         u32 r, i;
 806         int reclaim;
 807         unsigned long flags;
 808         u8 fill_rx = 0;
 809         u32 count = 8;
 810         int total_empty;
 811
 812         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 813          * buffer that the driver may process (last buffer filled by ucode). */
 814         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 815         i = rxq->read;
 816
 817         /* Rx interrupt, but nothing sent from uCode */
 818         if (i == r)
 819                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 820
 821         /* calculate total frames need to be restock after handling RX */
 822         total_empty = r - rxq->write_actual;
 823         if (total_empty < 0)
 824                 total_empty += RX_QUEUE_SIZE;
 825
 826         if (total_empty > (RX_QUEUE_SIZE / 2))
 827                 fill_rx = 1;
 828
 829         while (i != r) {
 830                 rxb = rxq->queue[i];
 831
 832                 /* If an RXB doesn't have a Rx queue slot associated with it,
 833                  * then a bug has been introduced in the queue refilling
 834                  * routines -- catch it here */
 835                 BUG_ON(rxb == NULL);
 836
 837                 rxq->queue[i] = NULL;
 838
 839                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
 840                                PAGE_SIZE << priv->hw_params.rx_page_order,
 841                                PCI_DMA_FROMDEVICE);
 842                 pkt = rxb_addr(rxb);
 843
 844                 trace_iwlwifi_dev_rx(priv, pkt,
 845                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
 846
 847                 /* Reclaim a command buffer only if this packet is a response
 848                  *   to a (driver-originated) command.
 849                  * If the packet (e.g. Rx frame) originated from uCode,
 850                  *   there is no command buffer to reclaim.
 851                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 852                  *   but apparently a few don't get set; catch them here. */
 853                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 854                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 855                         (pkt->hdr.cmd != REPLY_RX) &&
 856                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 857                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 858                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 859                         (pkt->hdr.cmd != REPLY_TX);
 860
 861                 /* Based on type of command response or notification,
 862                  *   handle those that need handling via function in
 863                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 864                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 865                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 866                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 867                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 868                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 869                 } else {
 870                         /* No handling needed */
 871                         IWL_DEBUG_RX(priv,
 872                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 873                                 r, i, get_cmd_string(pkt->hdr.cmd),
 874                                 pkt->hdr.cmd);
 875                 }
 876
 877                 /*
 878                  * XXX: After here, we should always check rxb->page
 879                  * against NULL before touching it or its virtual
 880                  * memory (pkt). Because some rx_handler might have
 881                  * already taken or freed the pages.
 882                  */
 883
 884                 if (reclaim) {
 885                         /* Invoke any callbacks, transfer the buffer to caller,
 886                          * and fire off the (possibly) blocking iwl_send_cmd()
 887                          * as we reclaim the driver command queue */
 888                         if (rxb->page)
 889                                 iwl_tx_cmd_complete(priv, rxb);
 890                         else
 891                                 IWL_WARN(priv, "Claim null rxb?\n");
 892                 }
 893
 894                 /* Reuse the page if possible. For notification packets and
 895                  * SKBs that fail to Rx correctly, add them back into the
 896                  * rx_free list for reuse later. */
 897                 spin_lock_irqsave(&rxq->lock, flags);
 898                 if (rxb->page != NULL) {
 899                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
 900                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
 901                                 PCI_DMA_FROMDEVICE);
 902                         list_add_tail(&rxb->list, &rxq->rx_free);
 903                         rxq->free_count++;
 904                 } else
 905                         list_add_tail(&rxb->list, &rxq->rx_used);
 906
 907                 spin_unlock_irqrestore(&rxq->lock, flags);
 908
 909                 i = (i + 1) & RX_QUEUE_MASK;
 910                 /* If there are a lot of unused frames,
 911                  * restock the Rx queue so ucode wont assert. */
 912                 if (fill_rx) {
 913                         count++;
 914                         if (count >= 8) {
 915                                 rxq->read = i;
 916                                 iwl_rx_replenish_now(priv);
 917                                 count = 0;
 918                         }
 919                 }
 920         }
 921
 922         /* Backtrack one entry */
 923         rxq->read = i;
 924         if (fill_rx)
 925                 iwl_rx_replenish_now(priv);
 926         else
 927                 iwl_rx_queue_restock(priv);
 928 }
 929
 930 /* call this function to flush any scheduled tasklet */
 931 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 932 {
 933         /* wait to make sure we flush pending tasklet*/
 934         synchronize_irq(priv->pci_dev->irq);
 935         tasklet_kill(&priv->irq_tasklet);
 936 }
 937
 938 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
 939 {
 940         u32 inta, handled = 0;
 941         u32 inta_fh;
 942         unsigned long flags;
 943         u32 i;
 944 #ifdef CONFIG_IWLWIFI_DEBUG
 945         u32 inta_mask;
 946 #endif
 947
 948         spin_lock_irqsave(&priv->lock, flags);
 949
 950         /* Ack/clear/reset pending uCode interrupts.
 951          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 952          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
 953         inta = iwl_read32(priv, CSR_INT);
 954         iwl_write32(priv, CSR_INT, inta);
 955
 956         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
 957          * Any new interrupts that happen after this, either while we're
 958          * in this tasklet, or later, will show up in next ISR/tasklet. */
 959         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
 960         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
 961
 962 #ifdef CONFIG_IWLWIFI_DEBUG
 963         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
 964                 /* just for debug */
 965                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 966                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
 967                               inta, inta_mask, inta_fh);
 968         }
 969 #endif
 970
 971         spin_unlock_irqrestore(&priv->lock, flags);
 972
 973         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
 974          * atomic, make sure that inta covers all the interrupts that
 975          * we've discovered, even if FH interrupt came in just after
 976          * reading CSR_INT. */
 977         if (inta_fh & CSR49_FH_INT_RX_MASK)
 978                 inta |= CSR_INT_BIT_FH_RX;
 979         if (inta_fh & CSR49_FH_INT_TX_MASK)
 980                 inta |= CSR_INT_BIT_FH_TX;
 981
 982         /* Now service all interrupt bits discovered above. */
 983         if (inta & CSR_INT_BIT_HW_ERR) {
 984                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 985
 986                 /* Tell the device to stop sending interrupts */
 987                 iwl_disable_interrupts(priv);
 988
 989                 priv->isr_stats.hw++;
 990                 iwl_irq_handle_error(priv);
 991
 992                 handled |= CSR_INT_BIT_HW_ERR;
 993
 994                 return;
 995         }
 996
 997 #ifdef CONFIG_IWLWIFI_DEBUG
 998         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
 999                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1000                 if (inta & CSR_INT_BIT_SCD) {
1001                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1002                                       "the frame/frames.\n");
1003                         priv->isr_stats.sch++;
1004                 }
1005
1006                 /* Alive notification via Rx interrupt will do the real work */
1007                 if (inta & CSR_INT_BIT_ALIVE) {
1008                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1009                         priv->isr_stats.alive++;
1010                 }
1011         }
1012 #endif
1013         /* Safely ignore these bits for debug checks below */
1014         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1015
1016         /* HW RF KILL switch toggled */
1017         if (inta & CSR_INT_BIT_RF_KILL) {
1018                 int hw_rf_kill = 0;
1019                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1020                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1021                         hw_rf_kill = 1;
1022
1023                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1024                                 hw_rf_kill ? "disable radio" : "enable radio");
1025
1026                 priv->isr_stats.rfkill++;
1027
1028                 /* driver only loads ucode once setting the interface up.
1029                  * the driver allows loading the ucode even if the radio
1030                  * is killed. Hence update the killswitch state here. The
1031                  * rfkill handler will care about restarting if needed.
1032                  */
1033                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1034                         if (hw_rf_kill)
1035                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1036                         else
1037                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1038                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1039                 }
1040
1041                 handled |= CSR_INT_BIT_RF_KILL;
1042         }
1043
1044         /* Chip got too hot and stopped itself */
1045         if (inta & CSR_INT_BIT_CT_KILL) {
1046                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1047                 priv->isr_stats.ctkill++;
1048                 handled |= CSR_INT_BIT_CT_KILL;
1049         }
1050
1051         /* Error detected by uCode */
1052         if (inta & CSR_INT_BIT_SW_ERR) {
1053                 IWL_ERR(priv, "Microcode SW error detected. "
1054                         " Restarting 0x%X.\n", inta);
1055                 priv->isr_stats.sw++;
1056                 priv->isr_stats.sw_err = inta;
1057                 iwl_irq_handle_error(priv);
1058                 handled |= CSR_INT_BIT_SW_ERR;
1059         }
1060
1061         /*
1062          * uCode wakes up after power-down sleep.
1063          * Tell device about any new tx or host commands enqueued,
1064          * and about any Rx buffers made available while asleep.
1065          */
1066         if (inta & CSR_INT_BIT_WAKEUP) {
1067                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1068                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1069                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1070                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1071                 priv->isr_stats.wakeup++;
1072                 handled |= CSR_INT_BIT_WAKEUP;
1073         }
1074
1075         /* All uCode command responses, including Tx command responses,
1076          * Rx "responses" (frame-received notification), and other
1077          * notifications from uCode come through here*/
1078         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1079                 iwl_rx_handle(priv);
1080                 priv->isr_stats.rx++;
1081                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1082         }
1083
1084         /* This "Tx" DMA channel is used only for loading uCode */
1085         if (inta & CSR_INT_BIT_FH_TX) {
1086                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1087                 priv->isr_stats.tx++;
1088                 handled |= CSR_INT_BIT_FH_TX;
1089                 /* Wake up uCode load routine, now that load is complete */
1090                 priv->ucode_write_complete = 1;
1091                 wake_up_interruptible(&priv->wait_command_queue);
1092         }
1093
1094         if (inta & ~handled) {
1095                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1096                 priv->isr_stats.unhandled++;
1097         }
1098
1099         if (inta & ~(priv->inta_mask)) {
1100                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1101                          inta & ~priv->inta_mask);
1102                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1103         }
1104
1105         /* Re-enable all interrupts */
1106         /* only Re-enable if diabled by irq */
1107         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1108                 iwl_enable_interrupts(priv);
1109
1110 #ifdef CONFIG_IWLWIFI_DEBUG
1111         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1112                 inta = iwl_read32(priv, CSR_INT);
1113                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1114                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1115                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1116                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1117         }
1118 #endif
1119 }
1120
1121 /* tasklet for iwlagn interrupt */
1122 static void iwl_irq_tasklet(struct iwl_priv *priv)
1123 {
1124         u32 inta = 0;
1125         u32 handled = 0;
1126         unsigned long flags;
1127         u32 i;
1128 #ifdef CONFIG_IWLWIFI_DEBUG
1129         u32 inta_mask;
1130 #endif
1131
1132         spin_lock_irqsave(&priv->lock, flags);
1133
1134         /* Ack/clear/reset pending uCode interrupts.
1135          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1136          */
1137         iwl_write32(priv, CSR_INT, priv->inta);
1138
1139         inta = priv->inta;
1140
1141 #ifdef CONFIG_IWLWIFI_DEBUG
1142         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1143                 /* just for debug */
1144                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1145                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1146                                 inta, inta_mask);
1147         }
1148 #endif
1149
1150         spin_unlock_irqrestore(&priv->lock, flags);
1151
1152         /* saved interrupt in inta variable now we can reset priv->inta */
1153         priv->inta = 0;
1154
1155         /* Now service all interrupt bits discovered above. */
1156         if (inta & CSR_INT_BIT_HW_ERR) {
1157                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1158
1159                 /* Tell the device to stop sending interrupts */
1160                 iwl_disable_interrupts(priv);
1161
1162                 priv->isr_stats.hw++;
1163                 iwl_irq_handle_error(priv);
1164
1165                 handled |= CSR_INT_BIT_HW_ERR;
1166
1167                 return;
1168         }
1169
1170 #ifdef CONFIG_IWLWIFI_DEBUG
1171         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1172                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1173                 if (inta & CSR_INT_BIT_SCD) {
1174                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1175                                       "the frame/frames.\n");
1176                         priv->isr_stats.sch++;
1177                 }
1178
1179                 /* Alive notification via Rx interrupt will do the real work */
1180                 if (inta & CSR_INT_BIT_ALIVE) {
1181                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1182                         priv->isr_stats.alive++;
1183                 }
1184         }
1185 #endif
1186         /* Safely ignore these bits for debug checks below */
1187         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1188
1189         /* HW RF KILL switch toggled */
1190         if (inta & CSR_INT_BIT_RF_KILL) {
1191                 int hw_rf_kill = 0;
1192                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1193                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1194                         hw_rf_kill = 1;
1195
1196                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1197                                 hw_rf_kill ? "disable radio" : "enable radio");
1198
1199                 priv->isr_stats.rfkill++;
1200
1201                 /* driver only loads ucode once setting the interface up.
1202                  * the driver allows loading the ucode even if the radio
1203                  * is killed. Hence update the killswitch state here. The
1204                  * rfkill handler will care about restarting if needed.
1205                  */
1206                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1207                         if (hw_rf_kill)
1208                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1209                         else
1210                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1211                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1212                 }
1213
1214                 handled |= CSR_INT_BIT_RF_KILL;
1215         }
1216
1217         /* Chip got too hot and stopped itself */
1218         if (inta & CSR_INT_BIT_CT_KILL) {
1219                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1220                 priv->isr_stats.ctkill++;
1221                 handled |= CSR_INT_BIT_CT_KILL;
1222         }
1223
1224         /* Error detected by uCode */
1225         if (inta & CSR_INT_BIT_SW_ERR) {
1226                 IWL_ERR(priv, "Microcode SW error detected. "
1227                         " Restarting 0x%X.\n", inta);
1228                 priv->isr_stats.sw++;
1229                 priv->isr_stats.sw_err = inta;
1230                 iwl_irq_handle_error(priv);
1231                 handled |= CSR_INT_BIT_SW_ERR;
1232         }
1233
1234         /* uCode wakes up after power-down sleep */
1235         if (inta & CSR_INT_BIT_WAKEUP) {
1236                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1237                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1238                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1239                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1240
1241                 priv->isr_stats.wakeup++;
1242
1243                 handled |= CSR_INT_BIT_WAKEUP;
1244         }
1245
1246         /* All uCode command responses, including Tx command responses,
1247          * Rx "responses" (frame-received notification), and other
1248          * notifications from uCode come through here*/
1249         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1250                         CSR_INT_BIT_RX_PERIODIC)) {
1251                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1252                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1253                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1254                         iwl_write32(priv, CSR_FH_INT_STATUS,
1255                                         CSR49_FH_INT_RX_MASK);
1256                 }
1257                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1258                         handled |= CSR_INT_BIT_RX_PERIODIC;
1259                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1260                 }
1261                 /* Sending RX interrupt require many steps to be done in the
1262                  * the device:
1263                  * 1- write interrupt to current index in ICT table.
1264                  * 2- dma RX frame.
1265                  * 3- update RX shared data to indicate last write index.
1266                  * 4- send interrupt.
1267                  * This could lead to RX race, driver could receive RX interrupt
1268                  * but the shared data changes does not reflect this;
1269                  * periodic interrupt will detect any dangling Rx activity.
1270                  */
1271
1272                 /* Disable periodic interrupt; we use it as just a one-shot. */
1273                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1274                             CSR_INT_PERIODIC_DIS);
1275                 iwl_rx_handle(priv);
1276
1277                 /*
1278                  * Enable periodic interrupt in 8 msec only if we received
1279                  * real RX interrupt (instead of just periodic int), to catch
1280                  * any dangling Rx interrupt.  If it was just the periodic
1281                  * interrupt, there was no dangling Rx activity, and no need
1282                  * to extend the periodic interrupt; one-shot is enough.
1283                  */
1284                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1285                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1286                                     CSR_INT_PERIODIC_ENA);
1287
1288                 priv->isr_stats.rx++;
1289         }
1290
1291         /* This "Tx" DMA channel is used only for loading uCode */
1292         if (inta & CSR_INT_BIT_FH_TX) {
1293                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1294                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1295                 priv->isr_stats.tx++;
1296                 handled |= CSR_INT_BIT_FH_TX;
1297                 /* Wake up uCode load routine, now that load is complete */
1298                 priv->ucode_write_complete = 1;
1299                 wake_up_interruptible(&priv->wait_command_queue);
1300         }
1301
1302         if (inta & ~handled) {
1303                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1304                 priv->isr_stats.unhandled++;
1305         }
1306
1307         if (inta & ~(priv->inta_mask)) {
1308                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1309                          inta & ~priv->inta_mask);
1310         }
1311
1312         /* Re-enable all interrupts */
1313         /* only Re-enable if diabled by irq */
1314         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1315                 iwl_enable_interrupts(priv);
1316 }
1317
1318
1319 /******************************************************************************
1320  *
1321  * uCode download functions
1322  *
1323  ******************************************************************************/
1324
1325 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1326 {
1327         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1328         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1329         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1330         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1331         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1332         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1333 }
1334
1335 static void iwl_nic_start(struct iwl_priv *priv)
1336 {
1337         /* Remove all resets to allow NIC to operate */
1338         iwl_write32(priv, CSR_RESET, 0);
1339 }
1340
1341
1342 /**
1343  * iwl_read_ucode - Read uCode images from disk file.
1344  *
1345  * Copy into buffers for card to fetch via bus-mastering
1346  */
1347 static int iwl_read_ucode(struct iwl_priv *priv)
1348 {
1349         struct iwl_ucode_header *ucode;
1350         int ret = -EINVAL, index;
1351         const struct firmware *ucode_raw;
1352         const char *name_pre = priv->cfg->fw_name_pre;
1353         const unsigned int api_max = priv->cfg->ucode_api_max;
1354         const unsigned int api_min = priv->cfg->ucode_api_min;
1355         char buf[25];
1356         u8 *src;
1357         size_t len;
1358         u32 api_ver, build;
1359         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1360         u16 eeprom_ver;
1361
1362         /* Ask kernel firmware_class module to get the boot firmware off disk.
1363          * request_firmware() is synchronous, file is in memory on return. */
1364         for (index = api_max; index >= api_min; index--) {
1365                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1366                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1367                 if (ret < 0) {
1368                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1369                                   buf, ret);
1370                         if (ret == -ENOENT)
1371                                 continue;
1372                         else
1373                                 goto error;
1374                 } else {
1375                         if (index < api_max)
1376                                 IWL_ERR(priv, "Loaded firmware %s, "
1377                                         "which is deprecated. "
1378                                         "Please use API v%u instead.\n",
1379                                           buf, api_max);
1380
1381                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1382                                        buf, ucode_raw->size);
1383                         break;
1384                 }
1385         }
1386
1387         if (ret < 0)
1388                 goto error;
1389
1390         /* Make sure that we got at least the v1 header! */
1391         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1392                 IWL_ERR(priv, "File size way too small!\n");
1393                 ret = -EINVAL;
1394                 goto err_release;
1395         }
1396
1397         /* Data from ucode file:  header followed by uCode images */
1398         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1399
1400         priv->ucode_ver = le32_to_cpu(ucode->ver);
1401         api_ver = IWL_UCODE_API(priv->ucode_ver);
1402         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1403         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1404         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1405         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1406         init_data_size =
1407                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1408         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1409         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1410
1411         /* api_ver should match the api version forming part of the
1412          * firmware filename ... but we don't check for that and only rely
1413          * on the API version read from firmware header from here on forward */
1414
1415         if (api_ver < api_min || api_ver > api_max) {
1416                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1417                           "Driver supports v%u, firmware is v%u.\n",
1418                           api_max, api_ver);
1419                 priv->ucode_ver = 0;
1420                 ret = -EINVAL;
1421                 goto err_release;
1422         }
1423         if (api_ver != api_max)
1424                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1425                           "got v%u. New firmware can be obtained "
1426                           "from http://www.intellinuxwireless.org.\n",
1427                           api_max, api_ver);
1428
1429         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1430                IWL_UCODE_MAJOR(priv->ucode_ver),
1431                IWL_UCODE_MINOR(priv->ucode_ver),
1432                IWL_UCODE_API(priv->ucode_ver),
1433                IWL_UCODE_SERIAL(priv->ucode_ver));
1434
1435         snprintf(priv->hw->wiphy->fw_version,
1436                  sizeof(priv->hw->wiphy->fw_version),
1437                  "%u.%u.%u.%u",
1438                  IWL_UCODE_MAJOR(priv->ucode_ver),
1439                  IWL_UCODE_MINOR(priv->ucode_ver),
1440                  IWL_UCODE_API(priv->ucode_ver),
1441                  IWL_UCODE_SERIAL(priv->ucode_ver));
1442
1443         if (build)
1444                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1445
1446         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1447         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1448                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1449                        ? "OTP" : "EEPROM", eeprom_ver);
1450
1451         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1452                        priv->ucode_ver);
1453         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1454                        inst_size);
1455         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1456                        data_size);
1457         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1458                        init_size);
1459         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1460                        init_data_size);
1461         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1462                        boot_size);
1463
1464         /* Verify size of file vs. image size info in file's header */
1465         if (ucode_raw->size !=
1466                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1467                 inst_size + data_size + init_size +
1468                 init_data_size + boot_size) {
1469
1470                 IWL_DEBUG_INFO(priv,
1471                         "uCode file size %d does not match expected size\n",
1472                         (int)ucode_raw->size);
1473                 ret = -EINVAL;
1474                 goto err_release;
1475         }
1476
1477         /* Verify that uCode images will fit in card's SRAM */
1478         if (inst_size > priv->hw_params.max_inst_size) {
1479                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1480                                inst_size);
1481                 ret = -EINVAL;
1482                 goto err_release;
1483         }
1484
1485         if (data_size > priv->hw_params.max_data_size) {
1486                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1487                                 data_size);
1488                 ret = -EINVAL;
1489                 goto err_release;
1490         }
1491         if (init_size > priv->hw_params.max_inst_size) {
1492                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1493                         init_size);
1494                 ret = -EINVAL;
1495                 goto err_release;
1496         }
1497         if (init_data_size > priv->hw_params.max_data_size) {
1498                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1499                       init_data_size);
1500                 ret = -EINVAL;
1501                 goto err_release;
1502         }
1503         if (boot_size > priv->hw_params.max_bsm_size) {
1504                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1505                         boot_size);
1506                 ret = -EINVAL;
1507                 goto err_release;
1508         }
1509
1510         /* Allocate ucode buffers for card's bus-master loading ... */
1511
1512         /* Runtime instructions and 2 copies of data:
1513          * 1) unmodified from disk
1514          * 2) backup cache for save/restore during power-downs */
1515         priv->ucode_code.len = inst_size;
1516         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1517
1518         priv->ucode_data.len = data_size;
1519         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1520
1521         priv->ucode_data_backup.len = data_size;
1522         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1523
1524         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1525             !priv->ucode_data_backup.v_addr)
1526                 goto err_pci_alloc;
1527
1528         /* Initialization instructions and data */
1529         if (init_size && init_data_size) {
1530                 priv->ucode_init.len = init_size;
1531                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1532
1533                 priv->ucode_init_data.len = init_data_size;
1534                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1535
1536                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1537                         goto err_pci_alloc;
1538         }
1539
1540         /* Bootstrap (instructions only, no data) */
1541         if (boot_size) {
1542                 priv->ucode_boot.len = boot_size;
1543                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1544
1545                 if (!priv->ucode_boot.v_addr)
1546                         goto err_pci_alloc;
1547         }
1548
1549         /* Copy images into buffers for card's bus-master reads ... */
1550
1551         /* Runtime instructions (first block of data in file) */
1552         len = inst_size;
1553         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1554         memcpy(priv->ucode_code.v_addr, src, len);
1555         src += len;
1556
1557         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1558                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1559
1560         /* Runtime data (2nd block)
1561          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1562         len = data_size;
1563         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1564         memcpy(priv->ucode_data.v_addr, src, len);
1565         memcpy(priv->ucode_data_backup.v_addr, src, len);
1566         src += len;
1567
1568         /* Initialization instructions (3rd block) */
1569         if (init_size) {
1570                 len = init_size;
1571                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1572                                 len);
1573                 memcpy(priv->ucode_init.v_addr, src, len);
1574                 src += len;
1575         }
1576
1577         /* Initialization data (4th block) */
1578         if (init_data_size) {
1579                 len = init_data_size;
1580                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1581                                len);
1582                 memcpy(priv->ucode_init_data.v_addr, src, len);
1583                 src += len;
1584         }
1585
1586         /* Bootstrap instructions (5th block) */
1587         len = boot_size;
1588         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1589         memcpy(priv->ucode_boot.v_addr, src, len);
1590
1591         /* We have our copies now, allow OS release its copies */
1592         release_firmware(ucode_raw);
1593         return 0;
1594
1595  err_pci_alloc:
1596         IWL_ERR(priv, "failed to allocate pci memory\n");
1597         ret = -ENOMEM;
1598         iwl_dealloc_ucode_pci(priv);
1599
1600  err_release:
1601         release_firmware(ucode_raw);
1602
1603  error:
1604         return ret;
1605 }
1606
1607 #ifdef CONFIG_IWLWIFI_DEBUG
1608 static const char *desc_lookup_text[] = {
1609         "OK",
1610         "FAIL",
1611         "BAD_PARAM",
1612         "BAD_CHECKSUM",
1613         "NMI_INTERRUPT_WDG",
1614         "SYSASSERT",
1615         "FATAL_ERROR",
1616         "BAD_COMMAND",
1617         "HW_ERROR_TUNE_LOCK",
1618         "HW_ERROR_TEMPERATURE",
1619         "ILLEGAL_CHAN_FREQ",
1620         "VCC_NOT_STABLE",
1621         "FH_ERROR",
1622         "NMI_INTERRUPT_HOST",
1623         "NMI_INTERRUPT_ACTION_PT",
1624         "NMI_INTERRUPT_UNKNOWN",
1625         "UCODE_VERSION_MISMATCH",
1626         "HW_ERROR_ABS_LOCK",
1627         "HW_ERROR_CAL_LOCK_FAIL",
1628         "NMI_INTERRUPT_INST_ACTION_PT",
1629         "NMI_INTERRUPT_DATA_ACTION_PT",
1630         "NMI_TRM_HW_ER",
1631         "NMI_INTERRUPT_TRM",
1632         "NMI_INTERRUPT_BREAK_POINT"
1633         "DEBUG_0",
1634         "DEBUG_1",
1635         "DEBUG_2",
1636         "DEBUG_3",
1637         "UNKNOWN"
1638 };
1639
1640 static const char *desc_lookup(int i)
1641 {
1642         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1643
1644         if (i < 0 || i > max)
1645                 i = max;
1646
1647         return desc_lookup_text[i];
1648 }
1649
1650 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1651 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1652
1653 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1654 {
1655         u32 data2, line;
1656         u32 desc, time, count, base, data1;
1657         u32 blink1, blink2, ilink1, ilink2;
1658
1659         if (priv->ucode_type == UCODE_INIT)
1660                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1661         else
1662                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1663
1664         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1665                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1666                 return;
1667         }
1668
1669         count = iwl_read_targ_mem(priv, base);
1670
1671         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1672                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1673                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1674                         priv->status, count);
1675         }
1676
1677         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1678         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1679         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1680         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1681         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1682         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1683         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1684         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1685         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1686
1687         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1688                                       blink1, blink2, ilink1, ilink2);
1689
1690         IWL_ERR(priv, "Desc                               Time       "
1691                 "data1      data2      line\n");
1692         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1693                 desc_lookup(desc), desc, time, data1, data2, line);
1694         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1695         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1696                 ilink1, ilink2);
1697
1698 }
1699
1700 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1701
1702 /**
1703  * iwl_print_event_log - Dump error event log to syslog
1704  *
1705  */
1706 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1707                                 u32 num_events, u32 mode)
1708 {
1709         u32 i;
1710         u32 base;       /* SRAM byte address of event log header */
1711         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1712         u32 ptr;        /* SRAM byte address of log data */
1713         u32 ev, time, data; /* event log data */
1714         unsigned long reg_flags;
1715
1716         if (num_events == 0)
1717                 return;
1718         if (priv->ucode_type == UCODE_INIT)
1719                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1720         else
1721                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1722
1723         if (mode == 0)
1724                 event_size = 2 * sizeof(u32);
1725         else
1726                 event_size = 3 * sizeof(u32);
1727
1728         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1729
1730         /* Make sure device is powered up for SRAM reads */
1731         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1732         iwl_grab_nic_access(priv);
1733
1734         /* Set starting address; reads will auto-increment */
1735         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1736         rmb();
1737
1738         /* "time" is actually "data" for mode 0 (no timestamp).
1739         * place event id # at far right for easier visual parsing. */
1740         for (i = 0; i < num_events; i++) {
1741                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1742                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1743                 if (mode == 0) {
1744                         /* data, ev */
1745                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1746                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1747                 } else {
1748                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1749                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1750                                         time, data, ev);
1751                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1752                 }
1753         }
1754
1755         /* Allow device to power down */
1756         iwl_release_nic_access(priv);
1757         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1758 }
1759
1760 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1761 #define MAX_EVENT_LOG_SIZE (512)
1762
1763 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1764 {
1765         u32 base;       /* SRAM byte address of event log header */
1766         u32 capacity;   /* event log capacity in # entries */
1767         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1768         u32 num_wraps;  /* # times uCode wrapped to top of log */
1769         u32 next_entry; /* index of next entry to be written by uCode */
1770         u32 size;       /* # entries that we'll print */
1771
1772         if (priv->ucode_type == UCODE_INIT)
1773                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1774         else
1775                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1776
1777         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1778                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1779                 return;
1780         }
1781
1782         /* event log header */
1783         capacity = iwl_read_targ_mem(priv, base);
1784         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1785         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1786         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1787
1788         if (capacity > MAX_EVENT_LOG_SIZE) {
1789                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1790                         capacity, MAX_EVENT_LOG_SIZE);
1791                 capacity = MAX_EVENT_LOG_SIZE;
1792         }
1793
1794         if (next_entry > MAX_EVENT_LOG_SIZE) {
1795                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1796                         next_entry, MAX_EVENT_LOG_SIZE);
1797                 next_entry = MAX_EVENT_LOG_SIZE;
1798         }
1799
1800         size = num_wraps ? capacity : next_entry;
1801
1802         /* bail out if nothing in log */
1803         if (size == 0) {
1804                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1805                 return;
1806         }
1807
1808         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1809                         size, num_wraps);
1810
1811         /* if uCode has wrapped back to top of log, start at the oldest entry,
1812          * i.e the next one that uCode would fill. */
1813         if (num_wraps)
1814                 iwl_print_event_log(priv, next_entry,
1815                                         capacity - next_entry, mode);
1816         /* (then/else) start at top of log */
1817         iwl_print_event_log(priv, 0, next_entry, mode);
1818
1819 }
1820 #endif
1821
1822 /**
1823  * iwl_alive_start - called after REPLY_ALIVE notification received
1824  *                   from protocol/runtime uCode (initialization uCode's
1825  *                   Alive gets handled by iwl_init_alive_start()).
1826  */
1827 static void iwl_alive_start(struct iwl_priv *priv)
1828 {
1829         int ret = 0;
1830
1831         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1832
1833         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1834                 /* We had an error bringing up the hardware, so take it
1835                  * all the way back down so we can try again */
1836                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1837                 goto restart;
1838         }
1839
1840         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1841          * This is a paranoid check, because we would not have gotten the
1842          * "runtime" alive if code weren't properly loaded.  */
1843         if (iwl_verify_ucode(priv)) {
1844                 /* Runtime instruction load was bad;
1845                  * take it all the way back down so we can try again */
1846                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1847                 goto restart;
1848         }
1849
1850         iwl_clear_stations_table(priv);
1851         ret = priv->cfg->ops->lib->alive_notify(priv);
1852         if (ret) {
1853                 IWL_WARN(priv,
1854                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1855                 goto restart;
1856         }
1857
1858         /* After the ALIVE response, we can send host commands to the uCode */
1859         set_bit(STATUS_ALIVE, &priv->status);
1860
1861         if (iwl_is_rfkill(priv))
1862                 return;
1863
1864         ieee80211_wake_queues(priv->hw);
1865
1866         priv->active_rate = priv->rates_mask;
1867         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1868
1869         /* Configure Tx antenna selection based on H/W config */
1870         if (priv->cfg->ops->hcmd->set_tx_ant)
1871                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
1872
1873         if (iwl_is_associated(priv)) {
1874                 struct iwl_rxon_cmd *active_rxon =
1875                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1876                 /* apply any changes in staging */
1877                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1878                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1879         } else {
1880                 /* Initialize our rx_config data */
1881                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1882
1883                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1884                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1885
1886                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1887         }
1888
1889         /* Configure Bluetooth device coexistence support */
1890         iwl_send_bt_config(priv);
1891
1892         iwl_reset_run_time_calib(priv);
1893
1894         /* Configure the adapter for unassociated operation */
1895         iwlcore_commit_rxon(priv);
1896
1897         /* At this point, the NIC is initialized and operational */
1898         iwl_rf_kill_ct_config(priv);
1899
1900         iwl_leds_init(priv);
1901
1902         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1903         set_bit(STATUS_READY, &priv->status);
1904         wake_up_interruptible(&priv->wait_command_queue);
1905
1906         iwl_power_update_mode(priv, true);
1907
1908         /* reassociate for ADHOC mode */
1909         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1910                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1911                                                                 priv->vif);
1912                 if (beacon)
1913                         iwl_mac_beacon_update(priv->hw, beacon);
1914         }
1915
1916
1917         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1918                 iwl_set_mode(priv, priv->iw_mode);
1919
1920         return;
1921
1922  restart:
1923         queue_work(priv->workqueue, &priv->restart);
1924 }
1925
1926 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1927
1928 static void __iwl_down(struct iwl_priv *priv)
1929 {
1930         unsigned long flags;
1931         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1932
1933         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1934
1935         if (!exit_pending)
1936                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1937
1938         iwl_clear_stations_table(priv);
1939
1940         /* Unblock any waiting calls */
1941         wake_up_interruptible_all(&priv->wait_command_queue);
1942
1943         /* Wipe out the EXIT_PENDING status bit if we are not actually
1944          * exiting the module */
1945         if (!exit_pending)
1946                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1947
1948         /* stop and reset the on-board processor */
1949         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1950
1951         /* tell the device to stop sending interrupts */
1952         spin_lock_irqsave(&priv->lock, flags);
1953         iwl_disable_interrupts(priv);
1954         spin_unlock_irqrestore(&priv->lock, flags);
1955         iwl_synchronize_irq(priv);
1956
1957         if (priv->mac80211_registered)
1958                 ieee80211_stop_queues(priv->hw);
1959
1960         /* If we have not previously called iwl_init() then
1961          * clear all bits but the RF Kill bit and return */
1962         if (!iwl_is_init(priv)) {
1963                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1964                                         STATUS_RF_KILL_HW |
1965                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1966                                         STATUS_GEO_CONFIGURED |
1967                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1968                                         STATUS_EXIT_PENDING;
1969                 goto exit;
1970         }
1971
1972         /* ...otherwise clear out all the status bits but the RF Kill
1973          * bit and continue taking the NIC down. */
1974         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1975                                 STATUS_RF_KILL_HW |
1976                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1977                                 STATUS_GEO_CONFIGURED |
1978                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1979                                 STATUS_FW_ERROR |
1980                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1981                                 STATUS_EXIT_PENDING;
1982
1983         /* device going down, Stop using ICT table */
1984         iwl_disable_ict(priv);
1985
1986         iwl_txq_ctx_stop(priv);
1987         iwl_rxq_stop(priv);
1988
1989         /* Power-down device's busmaster DMA clocks */
1990         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1991         udelay(5);
1992
1993         /* Make sure (redundant) we've released our request to stay awake */
1994         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1995
1996         /* Stop the device, and put it in low power state */
1997         priv->cfg->ops->lib->apm_ops.stop(priv);
1998
1999  exit:
2000         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2001
2002         if (priv->ibss_beacon)
2003                 dev_kfree_skb(priv->ibss_beacon);
2004         priv->ibss_beacon = NULL;
2005
2006         /* clear out any free frames */
2007         iwl_clear_free_frames(priv);
2008 }
2009
2010 static void iwl_down(struct iwl_priv *priv)
2011 {
2012         mutex_lock(&priv->mutex);
2013         __iwl_down(priv);
2014         mutex_unlock(&priv->mutex);
2015
2016         iwl_cancel_deferred_work(priv);
2017 }
2018
2019 #define HW_READY_TIMEOUT (50)
2020
2021 static int iwl_set_hw_ready(struct iwl_priv *priv)
2022 {
2023         int ret = 0;
2024
2025         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2026                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2027
2028         /* See if we got it */
2029         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2030                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2031                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2032                                 HW_READY_TIMEOUT);
2033         if (ret != -ETIMEDOUT)
2034                 priv->hw_ready = true;
2035         else
2036                 priv->hw_ready = false;
2037
2038         IWL_DEBUG_INFO(priv, "hardware %s\n",
2039                       (priv->hw_ready == 1) ? "ready" : "not ready");
2040         return ret;
2041 }
2042
2043 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2044 {
2045         int ret = 0;
2046
2047         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
2048
2049         ret = iwl_set_hw_ready(priv);
2050         if (priv->hw_ready)
2051                 return ret;
2052
2053         /* If HW is not ready, prepare the conditions to check again */
2054         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2055                         CSR_HW_IF_CONFIG_REG_PREPARE);
2056
2057         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2058                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2059                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2060
2061         /* HW should be ready by now, check again. */
2062         if (ret != -ETIMEDOUT)
2063                 iwl_set_hw_ready(priv);
2064
2065         return ret;
2066 }
2067
2068 #define MAX_HW_RESTARTS 5
2069
2070 static int __iwl_up(struct iwl_priv *priv)
2071 {
2072         int i;
2073         int ret;
2074
2075         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2076                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2077                 return -EIO;
2078         }
2079
2080         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2081                 IWL_ERR(priv, "ucode not available for device bringup\n");
2082                 return -EIO;
2083         }
2084
2085         iwl_prepare_card_hw(priv);
2086
2087         if (!priv->hw_ready) {
2088                 IWL_WARN(priv, "Exit HW not ready\n");
2089                 return -EIO;
2090         }
2091
2092         /* If platform's RF_KILL switch is NOT set to KILL */
2093         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2094                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2095         else
2096                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2097
2098         if (iwl_is_rfkill(priv)) {
2099                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2100
2101                 iwl_enable_interrupts(priv);
2102                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2103                 return 0;
2104         }
2105
2106         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2107
2108         ret = iwl_hw_nic_init(priv);
2109         if (ret) {
2110                 IWL_ERR(priv, "Unable to init nic\n");
2111                 return ret;
2112         }
2113
2114         /* make sure rfkill handshake bits are cleared */
2115         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2116         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2117                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2118
2119         /* clear (again), then enable host interrupts */
2120         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2121         iwl_enable_interrupts(priv);
2122
2123         /* really make sure rfkill handshake bits are cleared */
2124         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2125         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2126
2127         /* Copy original ucode data image from disk into backup cache.
2128          * This will be used to initialize the on-board processor's
2129          * data SRAM for a clean start when the runtime program first loads. */
2130         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2131                priv->ucode_data.len);
2132
2133         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2134
2135                 iwl_clear_stations_table(priv);
2136
2137                 /* load bootstrap state machine,
2138                  * load bootstrap program into processor's memory,
2139                  * prepare to load the "initialize" uCode */
2140                 ret = priv->cfg->ops->lib->load_ucode(priv);
2141
2142                 if (ret) {
2143                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2144                                 ret);
2145                         continue;
2146                 }
2147
2148                 /* start card; "initialize" will load runtime ucode */
2149                 iwl_nic_start(priv);
2150
2151                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2152
2153                 return 0;
2154         }
2155
2156         set_bit(STATUS_EXIT_PENDING, &priv->status);
2157         __iwl_down(priv);
2158         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2159
2160         /* tried to restart and config the device for as long as our
2161          * patience could withstand */
2162         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2163         return -EIO;
2164 }
2165
2166
2167 /*****************************************************************************
2168  *
2169  * Workqueue callbacks
2170  *
2171  *****************************************************************************/
2172
2173 static void iwl_bg_init_alive_start(struct work_struct *data)
2174 {
2175         struct iwl_priv *priv =
2176             container_of(data, struct iwl_priv, init_alive_start.work);
2177
2178         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2179                 return;
2180
2181         mutex_lock(&priv->mutex);
2182         priv->cfg->ops->lib->init_alive_start(priv);
2183         mutex_unlock(&priv->mutex);
2184 }
2185
2186 static void iwl_bg_alive_start(struct work_struct *data)
2187 {
2188         struct iwl_priv *priv =
2189             container_of(data, struct iwl_priv, alive_start.work);
2190
2191         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2192                 return;
2193
2194         /* enable dram interrupt */
2195         iwl_reset_ict(priv);
2196
2197         mutex_lock(&priv->mutex);
2198         iwl_alive_start(priv);
2199         mutex_unlock(&priv->mutex);
2200 }
2201
2202 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2203 {
2204         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2205                         run_time_calib_work);
2206
2207         mutex_lock(&priv->mutex);
2208
2209         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2210             test_bit(STATUS_SCANNING, &priv->status)) {
2211                 mutex_unlock(&priv->mutex);
2212                 return;
2213         }
2214
2215         if (priv->start_calib) {
2216                 iwl_chain_noise_calibration(priv, &priv->statistics);
2217
2218                 iwl_sensitivity_calibration(priv, &priv->statistics);
2219         }
2220
2221         mutex_unlock(&priv->mutex);
2222         return;
2223 }
2224
2225 static void iwl_bg_up(struct work_struct *data)
2226 {
2227         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2228
2229         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2230                 return;
2231
2232         mutex_lock(&priv->mutex);
2233         __iwl_up(priv);
2234         mutex_unlock(&priv->mutex);
2235 }
2236
2237 static void iwl_bg_restart(struct work_struct *data)
2238 {
2239         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2240
2241         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2242                 return;
2243
2244         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2245                 mutex_lock(&priv->mutex);
2246                 priv->vif = NULL;
2247                 priv->is_open = 0;
2248                 mutex_unlock(&priv->mutex);
2249                 iwl_down(priv);
2250                 ieee80211_restart_hw(priv->hw);
2251         } else {
2252                 iwl_down(priv);
2253                 queue_work(priv->workqueue, &priv->up);
2254         }
2255 }
2256
2257 static void iwl_bg_rx_replenish(struct work_struct *data)
2258 {
2259         struct iwl_priv *priv =
2260             container_of(data, struct iwl_priv, rx_replenish);
2261
2262         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2263                 return;
2264
2265         mutex_lock(&priv->mutex);
2266         iwl_rx_replenish(priv);
2267         mutex_unlock(&priv->mutex);
2268 }
2269
2270 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2271
2272 void iwl_post_associate(struct iwl_priv *priv)
2273 {
2274         struct ieee80211_conf *conf = NULL;
2275         int ret = 0;
2276         unsigned long flags;
2277
2278         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2279                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2280                 return;
2281         }
2282
2283         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2284                         priv->assoc_id, priv->active_rxon.bssid_addr);
2285
2286
2287         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2288                 return;
2289
2290
2291         if (!priv->vif || !priv->is_open)
2292                 return;
2293
2294         iwl_scan_cancel_timeout(priv, 200);
2295
2296         conf = ieee80211_get_hw_conf(priv->hw);
2297
2298         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2299         iwlcore_commit_rxon(priv);
2300
2301         iwl_setup_rxon_timing(priv);
2302         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2303                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2304         if (ret)
2305                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2306                             "Attempting to continue.\n");
2307
2308         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2309
2310         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2311
2312         if (priv->cfg->ops->hcmd->set_rxon_chain)
2313                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2314
2315         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2316
2317         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2318                         priv->assoc_id, priv->beacon_int);
2319
2320         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2321                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2322         else
2323                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2324
2325         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2326                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2327                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2328                 else
2329                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2330
2331                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2332                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2333
2334         }
2335
2336         iwlcore_commit_rxon(priv);
2337
2338         switch (priv->iw_mode) {
2339         case NL80211_IFTYPE_STATION:
2340                 break;
2341
2342         case NL80211_IFTYPE_ADHOC:
2343
2344                 /* assume default assoc id */
2345                 priv->assoc_id = 1;
2346
2347                 iwl_rxon_add_station(priv, priv->bssid, 0);
2348                 iwl_send_beacon_cmd(priv);
2349
2350                 break;
2351
2352         default:
2353                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2354                           __func__, priv->iw_mode);
2355                 break;
2356         }
2357
2358         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2359                 priv->assoc_station_added = 1;
2360
2361         spin_lock_irqsave(&priv->lock, flags);
2362         iwl_activate_qos(priv, 0);
2363         spin_unlock_irqrestore(&priv->lock, flags);
2364
2365         /* the chain noise calibration will enabled PM upon completion
2366          * If chain noise has already been run, then we need to enable
2367          * power management here */
2368         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2369                 iwl_power_update_mode(priv, false);
2370
2371         /* Enable Rx differential gain and sensitivity calibrations */
2372         iwl_chain_noise_reset(priv);
2373         priv->start_calib = 1;
2374
2375 }
2376
2377 /*****************************************************************************
2378  *
2379  * mac80211 entry point functions
2380  *
2381  *****************************************************************************/
2382
2383 #define UCODE_READY_TIMEOUT     (4 * HZ)
2384
2385 /*
2386  * Not a mac80211 entry point function, but it fits in with all the
2387  * other mac80211 functions grouped here.
2388  */
2389 static int iwl_setup_mac(struct iwl_priv *priv)
2390 {
2391         int ret;
2392         struct ieee80211_hw *hw = priv->hw;
2393         hw->rate_control_algorithm = "iwl-agn-rs";
2394
2395         /* Tell mac80211 our characteristics */
2396         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2397                     IEEE80211_HW_NOISE_DBM |
2398                     IEEE80211_HW_AMPDU_AGGREGATION |
2399                     IEEE80211_HW_SPECTRUM_MGMT;
2400
2401         if (!priv->cfg->broken_powersave)
2402                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2403                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2404
2405         hw->sta_data_size = sizeof(struct iwl_station_priv);
2406         hw->wiphy->interface_modes =
2407                 BIT(NL80211_IFTYPE_STATION) |
2408                 BIT(NL80211_IFTYPE_ADHOC);
2409
2410         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
2411                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
2412
2413         /*
2414          * For now, disable PS by default because it affects
2415          * RX performance significantly.
2416          */
2417         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2418
2419         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2420         /* we create the 802.11 header and a zero-length SSID element */
2421         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
2422
2423         /* Default value; 4 EDCA QOS priorities */
2424         hw->queues = 4;
2425
2426         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2427
2428         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2429                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2430                         &priv->bands[IEEE80211_BAND_2GHZ];
2431         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2432                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2433                         &priv->bands[IEEE80211_BAND_5GHZ];
2434
2435         ret = ieee80211_register_hw(priv->hw);
2436         if (ret) {
2437                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2438                 return ret;
2439         }
2440         priv->mac80211_registered = 1;
2441
2442         return 0;
2443 }
2444
2445
2446 static int iwl_mac_start(struct ieee80211_hw *hw)
2447 {
2448         struct iwl_priv *priv = hw->priv;
2449         int ret;
2450
2451         IWL_DEBUG_MAC80211(priv, "enter\n");
2452
2453         /* we should be verifying the device is ready to be opened */
2454         mutex_lock(&priv->mutex);
2455
2456         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2457          * ucode filename and max sizes are card-specific. */
2458
2459         if (!priv->ucode_code.len) {
2460                 ret = iwl_read_ucode(priv);
2461                 if (ret) {
2462                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2463                         mutex_unlock(&priv->mutex);
2464                         return ret;
2465                 }
2466         }
2467
2468         ret = __iwl_up(priv);
2469
2470         mutex_unlock(&priv->mutex);
2471
2472         if (ret)
2473                 return ret;
2474
2475         if (iwl_is_rfkill(priv))
2476                 goto out;
2477
2478         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2479
2480         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2481          * mac80211 will not be run successfully. */
2482         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2483                         test_bit(STATUS_READY, &priv->status),
2484                         UCODE_READY_TIMEOUT);
2485         if (!ret) {
2486                 if (!test_bit(STATUS_READY, &priv->status)) {
2487                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2488                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2489                         return -ETIMEDOUT;
2490                 }
2491         }
2492
2493         iwl_led_start(priv);
2494
2495 out:
2496         priv->is_open = 1;
2497         IWL_DEBUG_MAC80211(priv, "leave\n");
2498         return 0;
2499 }
2500
2501 static void iwl_mac_stop(struct ieee80211_hw *hw)
2502 {
2503         struct iwl_priv *priv = hw->priv;
2504
2505         IWL_DEBUG_MAC80211(priv, "enter\n");
2506
2507         if (!priv->is_open)
2508                 return;
2509
2510         priv->is_open = 0;
2511
2512         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2513                 /* stop mac, cancel any scan request and clear
2514                  * RXON_FILTER_ASSOC_MSK BIT
2515                  */
2516                 mutex_lock(&priv->mutex);
2517                 iwl_scan_cancel_timeout(priv, 100);
2518                 mutex_unlock(&priv->mutex);
2519         }
2520
2521         iwl_down(priv);
2522
2523         flush_workqueue(priv->workqueue);
2524
2525         /* enable interrupts again in order to receive rfkill changes */
2526         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2527         iwl_enable_interrupts(priv);
2528
2529         IWL_DEBUG_MAC80211(priv, "leave\n");
2530 }
2531
2532 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2533 {
2534         struct iwl_priv *priv = hw->priv;
2535
2536         IWL_DEBUG_MACDUMP(priv, "enter\n");
2537
2538         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2539                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2540
2541         if (iwl_tx_skb(priv, skb))
2542                 dev_kfree_skb_any(skb);
2543
2544         IWL_DEBUG_MACDUMP(priv, "leave\n");
2545         return NETDEV_TX_OK;
2546 }
2547
2548 void iwl_config_ap(struct iwl_priv *priv)
2549 {
2550         int ret = 0;
2551         unsigned long flags;
2552
2553         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2554                 return;
2555
2556         /* The following should be done only at AP bring up */
2557         if (!iwl_is_associated(priv)) {
2558
2559                 /* RXON - unassoc (to set timing command) */
2560                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2561                 iwlcore_commit_rxon(priv);
2562
2563                 /* RXON Timing */
2564                 iwl_setup_rxon_timing(priv);
2565                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2566                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2567                 if (ret)
2568                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2569                                         "Attempting to continue.\n");
2570
2571                 /* AP has all antennas */
2572                 priv->chain_noise_data.active_chains =
2573                         priv->hw_params.valid_rx_ant;
2574                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
2575                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2576                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2577
2578                 /* FIXME: what should be the assoc_id for AP? */
2579                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2580                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2581                         priv->staging_rxon.flags |=
2582                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2583                 else
2584                         priv->staging_rxon.flags &=
2585                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2586
2587                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2588                         if (priv->assoc_capability &
2589                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2590                                 priv->staging_rxon.flags |=
2591                                         RXON_FLG_SHORT_SLOT_MSK;
2592                         else
2593                                 priv->staging_rxon.flags &=
2594                                         ~RXON_FLG_SHORT_SLOT_MSK;
2595
2596                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2597                                 priv->staging_rxon.flags &=
2598                                         ~RXON_FLG_SHORT_SLOT_MSK;
2599                 }
2600                 /* restore RXON assoc */
2601                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2602                 iwlcore_commit_rxon(priv);
2603                 iwl_reset_qos(priv);
2604                 spin_lock_irqsave(&priv->lock, flags);
2605                 iwl_activate_qos(priv, 1);
2606                 spin_unlock_irqrestore(&priv->lock, flags);
2607                 iwl_add_bcast_station(priv);
2608         }
2609         iwl_send_beacon_cmd(priv);
2610
2611         /* FIXME - we need to add code here to detect a totally new
2612          * configuration, reset the AP, unassoc, rxon timing, assoc,
2613          * clear sta table, add BCAST sta... */
2614 }
2615
2616 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2617                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2618                         u32 iv32, u16 *phase1key)
2619 {
2620
2621         struct iwl_priv *priv = hw->priv;
2622         IWL_DEBUG_MAC80211(priv, "enter\n");
2623
2624         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2625
2626         IWL_DEBUG_MAC80211(priv, "leave\n");
2627 }
2628
2629 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2630                            struct ieee80211_vif *vif,
2631                            struct ieee80211_sta *sta,
2632                            struct ieee80211_key_conf *key)
2633 {
2634         struct iwl_priv *priv = hw->priv;
2635         const u8 *addr;
2636         int ret;
2637         u8 sta_id;
2638         bool is_default_wep_key = false;
2639
2640         IWL_DEBUG_MAC80211(priv, "enter\n");
2641
2642         if (priv->cfg->mod_params->sw_crypto) {
2643                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2644                 return -EOPNOTSUPP;
2645         }
2646         addr = sta ? sta->addr : iwl_bcast_addr;
2647         sta_id = iwl_find_station(priv, addr);
2648         if (sta_id == IWL_INVALID_STATION) {
2649                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2650                                    addr);
2651                 return -EINVAL;
2652
2653         }
2654
2655         mutex_lock(&priv->mutex);
2656         iwl_scan_cancel_timeout(priv, 100);
2657         mutex_unlock(&priv->mutex);
2658
2659         /* If we are getting WEP group key and we didn't receive any key mapping
2660          * so far, we are in legacy wep mode (group key only), otherwise we are
2661          * in 1X mode.
2662          * In legacy wep mode, we use another host command to the uCode */
2663         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2664                 priv->iw_mode != NL80211_IFTYPE_AP) {
2665                 if (cmd == SET_KEY)
2666                         is_default_wep_key = !priv->key_mapping_key;
2667                 else
2668                         is_default_wep_key =
2669                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2670         }
2671
2672         switch (cmd) {
2673         case SET_KEY:
2674                 if (is_default_wep_key)
2675                         ret = iwl_set_default_wep_key(priv, key);
2676                 else
2677                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2678
2679                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2680                 break;
2681         case DISABLE_KEY:
2682                 if (is_default_wep_key)
2683                         ret = iwl_remove_default_wep_key(priv, key);
2684                 else
2685                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2686
2687                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2688                 break;
2689         default:
2690                 ret = -EINVAL;
2691         }
2692
2693         IWL_DEBUG_MAC80211(priv, "leave\n");
2694
2695         return ret;
2696 }
2697
2698 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2699                                 struct ieee80211_vif *vif,
2700                              enum ieee80211_ampdu_mlme_action action,
2701                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2702 {
2703         struct iwl_priv *priv = hw->priv;
2704         int ret;
2705
2706         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2707                      sta->addr, tid);
2708
2709         if (!(priv->cfg->sku & IWL_SKU_N))
2710                 return -EACCES;
2711
2712         switch (action) {
2713         case IEEE80211_AMPDU_RX_START:
2714                 IWL_DEBUG_HT(priv, "start Rx\n");
2715                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2716         case IEEE80211_AMPDU_RX_STOP:
2717                 IWL_DEBUG_HT(priv, "stop Rx\n");
2718                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2719                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2720                         return 0;
2721                 else
2722                         return ret;
2723         case IEEE80211_AMPDU_TX_START:
2724                 IWL_DEBUG_HT(priv, "start Tx\n");
2725                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2726         case IEEE80211_AMPDU_TX_STOP:
2727                 IWL_DEBUG_HT(priv, "stop Tx\n");
2728                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2729                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2730                         return 0;
2731                 else
2732                         return ret;
2733         default:
2734                 IWL_DEBUG_HT(priv, "unknown\n");
2735                 return -EINVAL;
2736                 break;
2737         }
2738         return 0;
2739 }
2740
2741 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2742                              struct ieee80211_low_level_stats *stats)
2743 {
2744         struct iwl_priv *priv = hw->priv;
2745
2746         priv = hw->priv;
2747         IWL_DEBUG_MAC80211(priv, "enter\n");
2748         IWL_DEBUG_MAC80211(priv, "leave\n");
2749
2750         return 0;
2751 }
2752
2753 static void iwl_mac_sta_notify(struct ieee80211_hw *hw,
2754                                struct ieee80211_vif *vif,
2755                                enum sta_notify_cmd cmd,
2756                                struct ieee80211_sta *sta)
2757 {
2758         struct iwl_priv *priv = hw->priv;
2759         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2760         int sta_id;
2761
2762         /*
2763          * TODO: We really should use this callback to
2764          *       actually maintain the station table in
2765          *       the device.
2766          */
2767
2768         switch (cmd) {
2769         case STA_NOTIFY_ADD:
2770                 atomic_set(&sta_priv->pending_frames, 0);
2771                 if (vif->type == NL80211_IFTYPE_AP)
2772                         sta_priv->client = true;
2773                 break;
2774         case STA_NOTIFY_SLEEP:
2775                 WARN_ON(!sta_priv->client);
2776                 sta_priv->asleep = true;
2777                 if (atomic_read(&sta_priv->pending_frames) > 0)
2778                         ieee80211_sta_block_awake(hw, sta, true);
2779                 break;
2780         case STA_NOTIFY_AWAKE:
2781                 WARN_ON(!sta_priv->client);
2782                 sta_priv->asleep = false;
2783                 sta_id = iwl_find_station(priv, sta->addr);
2784                 if (sta_id != IWL_INVALID_STATION)
2785                         iwl_sta_modify_ps_wake(priv, sta_id);
2786                 break;
2787         default:
2788                 break;
2789         }
2790 }
2791
2792 /*****************************************************************************
2793  *
2794  * sysfs attributes
2795  *
2796  *****************************************************************************/
2797
2798 #ifdef CONFIG_IWLWIFI_DEBUG
2799
2800 /*
2801  * The following adds a new attribute to the sysfs representation
2802  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2803  * used for controlling the debug level.
2804  *
2805  * See the level definitions in iwl for details.
2806  *
2807  * The debug_level being managed using sysfs below is a per device debug
2808  * level that is used instead of the global debug level if it (the per
2809  * device debug level) is set.
2810  */
2811 static ssize_t show_debug_level(struct device *d,
2812                                 struct device_attribute *attr, char *buf)
2813 {
2814         struct iwl_priv *priv = dev_get_drvdata(d);
2815         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
2816 }
2817 static ssize_t store_debug_level(struct device *d,
2818                                 struct device_attribute *attr,
2819                                  const char *buf, size_t count)
2820 {
2821         struct iwl_priv *priv = dev_get_drvdata(d);
2822         unsigned long val;
2823         int ret;
2824
2825         ret = strict_strtoul(buf, 0, &val);
2826         if (ret)
2827                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2828         else {
2829                 priv->debug_level = val;
2830                 if (iwl_alloc_traffic_mem(priv))
2831                         IWL_ERR(priv,
2832                                 "Not enough memory to generate traffic log\n");
2833         }
2834         return strnlen(buf, count);
2835 }
2836
2837 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2838                         show_debug_level, store_debug_level);
2839
2840
2841 #endif /* CONFIG_IWLWIFI_DEBUG */
2842
2843
2844 static ssize_t show_temperature(struct device *d,
2845                                 struct device_attribute *attr, char *buf)
2846 {
2847         struct iwl_priv *priv = dev_get_drvdata(d);
2848
2849         if (!iwl_is_alive(priv))
2850                 return -EAGAIN;
2851
2852         return sprintf(buf, "%d\n", priv->temperature);
2853 }
2854
2855 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2856
2857 static ssize_t show_tx_power(struct device *d,
2858                              struct device_attribute *attr, char *buf)
2859 {
2860         struct iwl_priv *priv = dev_get_drvdata(d);
2861
2862         if (!iwl_is_ready_rf(priv))
2863                 return sprintf(buf, "off\n");
2864         else
2865                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2866 }
2867
2868 static ssize_t store_tx_power(struct device *d,
2869                               struct device_attribute *attr,
2870                               const char *buf, size_t count)
2871 {
2872         struct iwl_priv *priv = dev_get_drvdata(d);
2873         unsigned long val;
2874         int ret;
2875
2876         ret = strict_strtoul(buf, 10, &val);
2877         if (ret)
2878                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2879         else {
2880                 ret = iwl_set_tx_power(priv, val, false);
2881                 if (ret)
2882                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
2883                                 ret);
2884                 else
2885                         ret = count;
2886         }
2887         return ret;
2888 }
2889
2890 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2891
2892 static ssize_t show_flags(struct device *d,
2893                           struct device_attribute *attr, char *buf)
2894 {
2895         struct iwl_priv *priv = dev_get_drvdata(d);
2896
2897         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2898 }
2899
2900 static ssize_t store_flags(struct device *d,
2901                            struct device_attribute *attr,
2902                            const char *buf, size_t count)
2903 {
2904         struct iwl_priv *priv = dev_get_drvdata(d);
2905         unsigned long val;
2906         u32 flags;
2907         int ret = strict_strtoul(buf, 0, &val);
2908         if (ret)
2909                 return ret;
2910         flags = (u32)val;
2911
2912         mutex_lock(&priv->mutex);
2913         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2914                 /* Cancel any currently running scans... */
2915                 if (iwl_scan_cancel_timeout(priv, 100))
2916                         IWL_WARN(priv, "Could not cancel scan.\n");
2917                 else {
2918                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2919                         priv->staging_rxon.flags = cpu_to_le32(flags);
2920                         iwlcore_commit_rxon(priv);
2921                 }
2922         }
2923         mutex_unlock(&priv->mutex);
2924
2925         return count;
2926 }
2927
2928 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2929
2930 static ssize_t show_filter_flags(struct device *d,
2931                                  struct device_attribute *attr, char *buf)
2932 {
2933         struct iwl_priv *priv = dev_get_drvdata(d);
2934
2935         return sprintf(buf, "0x%04X\n",
2936                 le32_to_cpu(priv->active_rxon.filter_flags));
2937 }
2938
2939 static ssize_t store_filter_flags(struct device *d,
2940                                   struct device_attribute *attr,
2941                                   const char *buf, size_t count)
2942 {
2943         struct iwl_priv *priv = dev_get_drvdata(d);
2944         unsigned long val;
2945         u32 filter_flags;
2946         int ret = strict_strtoul(buf, 0, &val);
2947         if (ret)
2948                 return ret;
2949         filter_flags = (u32)val;
2950
2951         mutex_lock(&priv->mutex);
2952         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2953                 /* Cancel any currently running scans... */
2954                 if (iwl_scan_cancel_timeout(priv, 100))
2955                         IWL_WARN(priv, "Could not cancel scan.\n");
2956                 else {
2957                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2958                                        "0x%04X\n", filter_flags);
2959                         priv->staging_rxon.filter_flags =
2960                                 cpu_to_le32(filter_flags);
2961                         iwlcore_commit_rxon(priv);
2962                 }
2963         }
2964         mutex_unlock(&priv->mutex);
2965
2966         return count;
2967 }
2968
2969 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2970                    store_filter_flags);
2971
2972
2973 static ssize_t show_statistics(struct device *d,
2974                                struct device_attribute *attr, char *buf)
2975 {
2976         struct iwl_priv *priv = dev_get_drvdata(d);
2977         u32 size = sizeof(struct iwl_notif_statistics);
2978         u32 len = 0, ofs = 0;
2979         u8 *data = (u8 *)&priv->statistics;
2980         int rc = 0;
2981
2982         if (!iwl_is_alive(priv))
2983                 return -EAGAIN;
2984
2985         mutex_lock(&priv->mutex);
2986         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
2987         mutex_unlock(&priv->mutex);
2988
2989         if (rc) {
2990                 len = sprintf(buf,
2991                               "Error sending statistics request: 0x%08X\n", rc);
2992                 return len;
2993         }
2994
2995         while (size && (PAGE_SIZE - len)) {
2996                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2997                                    PAGE_SIZE - len, 1);
2998                 len = strlen(buf);
2999                 if (PAGE_SIZE - len)
3000                         buf[len++] = '\n';
3001
3002                 ofs += 16;
3003                 size -= min(size, 16U);
3004         }
3005
3006         return len;
3007 }
3008
3009 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3010
3011 static ssize_t show_rts_ht_protection(struct device *d,
3012                              struct device_attribute *attr, char *buf)
3013 {
3014         struct iwl_priv *priv = dev_get_drvdata(d);
3015
3016         return sprintf(buf, "%s\n",
3017                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
3018 }
3019
3020 static ssize_t store_rts_ht_protection(struct device *d,
3021                               struct device_attribute *attr,
3022                               const char *buf, size_t count)
3023 {
3024         struct iwl_priv *priv = dev_get_drvdata(d);
3025         unsigned long val;
3026         int ret;
3027
3028         ret = strict_strtoul(buf, 10, &val);
3029         if (ret)
3030                 IWL_INFO(priv, "Input is not in decimal form.\n");
3031         else {
3032                 if (!iwl_is_associated(priv))
3033                         priv->cfg->use_rts_for_ht = val ? true : false;
3034                 else
3035                         IWL_ERR(priv, "Sta associated with AP - "
3036                                 "Change protection mechanism is not allowed\n");
3037                 ret = count;
3038         }
3039         return ret;
3040 }
3041
3042 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
3043                         show_rts_ht_protection, store_rts_ht_protection);
3044
3045
3046 /*****************************************************************************
3047  *
3048  * driver setup and teardown
3049  *
3050  *****************************************************************************/
3051
3052 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3053 {
3054         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3055
3056         init_waitqueue_head(&priv->wait_command_queue);
3057
3058         INIT_WORK(&priv->up, iwl_bg_up);
3059         INIT_WORK(&priv->restart, iwl_bg_restart);
3060         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3061         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3062         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3063         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3064         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3065
3066         iwl_setup_scan_deferred_work(priv);
3067
3068         if (priv->cfg->ops->lib->setup_deferred_work)
3069                 priv->cfg->ops->lib->setup_deferred_work(priv);
3070
3071         init_timer(&priv->statistics_periodic);
3072         priv->statistics_periodic.data = (unsigned long)priv;
3073         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3074
3075         if (!priv->cfg->use_isr_legacy)
3076                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3077                         iwl_irq_tasklet, (unsigned long)priv);
3078         else
3079                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3080                         iwl_irq_tasklet_legacy, (unsigned long)priv);
3081 }
3082
3083 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3084 {
3085         if (priv->cfg->ops->lib->cancel_deferred_work)
3086                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3087
3088         cancel_delayed_work_sync(&priv->init_alive_start);
3089         cancel_delayed_work(&priv->scan_check);
3090         cancel_delayed_work(&priv->alive_start);
3091         cancel_work_sync(&priv->beacon_update);
3092         del_timer_sync(&priv->statistics_periodic);
3093 }
3094
3095 static void iwl_init_hw_rates(struct iwl_priv *priv,
3096                               struct ieee80211_rate *rates)
3097 {
3098         int i;
3099
3100         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3101                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3102                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3103                 rates[i].hw_value_short = i;
3104                 rates[i].flags = 0;
3105                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3106                         /*
3107                          * If CCK != 1M then set short preamble rate flag.
3108                          */
3109                         rates[i].flags |=
3110                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3111                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3112                 }
3113         }
3114 }
3115
3116 static int iwl_init_drv(struct iwl_priv *priv)
3117 {
3118         int ret;
3119
3120         priv->ibss_beacon = NULL;
3121
3122         spin_lock_init(&priv->lock);
3123         spin_lock_init(&priv->sta_lock);
3124         spin_lock_init(&priv->hcmd_lock);
3125
3126         INIT_LIST_HEAD(&priv->free_frames);
3127
3128         mutex_init(&priv->mutex);
3129
3130         /* Clear the driver's (not device's) station table */
3131         iwl_clear_stations_table(priv);
3132
3133         priv->ieee_channels = NULL;
3134         priv->ieee_rates = NULL;
3135         priv->band = IEEE80211_BAND_2GHZ;
3136
3137         priv->iw_mode = NL80211_IFTYPE_STATION;
3138         if (priv->cfg->support_sm_ps)
3139                 priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DYNAMIC;
3140         else
3141                 priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
3142
3143         /* Choose which receivers/antennas to use */
3144         if (priv->cfg->ops->hcmd->set_rxon_chain)
3145                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
3146
3147         iwl_init_scan_params(priv);
3148
3149         iwl_reset_qos(priv);
3150
3151         priv->qos_data.qos_active = 0;
3152         priv->qos_data.qos_cap.val = 0;
3153
3154         priv->rates_mask = IWL_RATES_MASK;
3155         /* Set the tx_power_user_lmt to the lowest power level
3156          * this value will get overwritten by channel max power avg
3157          * from eeprom */
3158         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
3159
3160         ret = iwl_init_channel_map(priv);
3161         if (ret) {
3162                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3163                 goto err;
3164         }
3165
3166         ret = iwlcore_init_geos(priv);
3167         if (ret) {
3168                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3169                 goto err_free_channel_map;
3170         }
3171         iwl_init_hw_rates(priv, priv->ieee_rates);
3172
3173         return 0;
3174
3175 err_free_channel_map:
3176         iwl_free_channel_map(priv);
3177 err:
3178         return ret;
3179 }
3180
3181 static void iwl_uninit_drv(struct iwl_priv *priv)
3182 {
3183         iwl_calib_free_results(priv);
3184         iwlcore_free_geos(priv);
3185         iwl_free_channel_map(priv);
3186         kfree(priv->scan);
3187 }
3188
3189 static struct attribute *iwl_sysfs_entries[] = {
3190         &dev_attr_flags.attr,
3191         &dev_attr_filter_flags.attr,
3192         &dev_attr_statistics.attr,
3193         &dev_attr_temperature.attr,
3194         &dev_attr_tx_power.attr,
3195         &dev_attr_rts_ht_protection.attr,
3196 #ifdef CONFIG_IWLWIFI_DEBUG
3197         &dev_attr_debug_level.attr,
3198 #endif
3199         NULL
3200 };
3201
3202 static struct attribute_group iwl_attribute_group = {
3203         .name = NULL,           /* put in device directory */
3204         .attrs = iwl_sysfs_entries,
3205 };
3206
3207 static struct ieee80211_ops iwl_hw_ops = {
3208         .tx = iwl_mac_tx,
3209         .start = iwl_mac_start,
3210         .stop = iwl_mac_stop,
3211         .add_interface = iwl_mac_add_interface,
3212         .remove_interface = iwl_mac_remove_interface,
3213         .config = iwl_mac_config,
3214         .configure_filter = iwl_configure_filter,
3215         .set_key = iwl_mac_set_key,
3216         .update_tkip_key = iwl_mac_update_tkip_key,
3217         .get_stats = iwl_mac_get_stats,
3218         .get_tx_stats = iwl_mac_get_tx_stats,
3219         .conf_tx = iwl_mac_conf_tx,
3220         .reset_tsf = iwl_mac_reset_tsf,
3221         .bss_info_changed = iwl_bss_info_changed,
3222         .ampdu_action = iwl_mac_ampdu_action,
3223         .hw_scan = iwl_mac_hw_scan,
3224         .sta_notify = iwl_mac_sta_notify,
3225 };
3226
3227 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3228 {
3229         int err = 0;
3230         struct iwl_priv *priv;
3231         struct ieee80211_hw *hw;
3232         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3233         unsigned long flags;
3234         u16 pci_cmd;
3235
3236         /************************
3237          * 1. Allocating HW data
3238          ************************/
3239
3240         /* Disabling hardware scan means that mac80211 will perform scans
3241          * "the hard way", rather than using device's scan. */
3242         if (cfg->mod_params->disable_hw_scan) {
3243                 if (iwl_debug_level & IWL_DL_INFO)
3244                         dev_printk(KERN_DEBUG, &(pdev->dev),
3245                                    "Disabling hw_scan\n");
3246                 iwl_hw_ops.hw_scan = NULL;
3247         }
3248
3249         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3250         if (!hw) {
3251                 err = -ENOMEM;
3252                 goto out;
3253         }
3254         priv = hw->priv;
3255         /* At this point both hw and priv are allocated. */
3256
3257         SET_IEEE80211_DEV(hw, &pdev->dev);
3258
3259         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3260         priv->cfg = cfg;
3261         priv->pci_dev = pdev;
3262         priv->inta_mask = CSR_INI_SET_MASK;
3263
3264 #ifdef CONFIG_IWLWIFI_DEBUG
3265         atomic_set(&priv->restrict_refcnt, 0);
3266 #endif
3267         if (iwl_alloc_traffic_mem(priv))
3268                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3269
3270         /**************************
3271          * 2. Initializing PCI bus
3272          **************************/
3273         if (pci_enable_device(pdev)) {
3274                 err = -ENODEV;
3275                 goto out_ieee80211_free_hw;
3276         }
3277
3278         pci_set_master(pdev);
3279
3280         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3281         if (!err)
3282                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3283         if (err) {
3284                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3285                 if (!err)
3286                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3287                 /* both attempts failed: */
3288                 if (err) {
3289                         IWL_WARN(priv, "No suitable DMA available.\n");
3290                         goto out_pci_disable_device;
3291                 }
3292         }
3293
3294         err = pci_request_regions(pdev, DRV_NAME);
3295         if (err)
3296                 goto out_pci_disable_device;
3297
3298         pci_set_drvdata(pdev, priv);
3299
3300
3301         /***********************
3302          * 3. Read REV register
3303          ***********************/
3304         priv->hw_base = pci_iomap(pdev, 0, 0);
3305         if (!priv->hw_base) {
3306                 err = -ENODEV;
3307                 goto out_pci_release_regions;
3308         }
3309
3310         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3311                 (unsigned long long) pci_resource_len(pdev, 0));
3312         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3313
3314         /* this spin lock will be used in apm_ops.init and EEPROM access
3315          * we should init now
3316          */
3317         spin_lock_init(&priv->reg_lock);
3318         iwl_hw_detect(priv);
3319         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3320                 priv->cfg->name, priv->hw_rev);
3321
3322         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3323          * PCI Tx retries from interfering with C3 CPU state */
3324         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3325
3326         iwl_prepare_card_hw(priv);
3327         if (!priv->hw_ready) {
3328                 IWL_WARN(priv, "Failed, HW not ready\n");
3329                 goto out_iounmap;
3330         }
3331
3332         /*****************
3333          * 4. Read EEPROM
3334          *****************/
3335         /* Read the EEPROM */
3336         err = iwl_eeprom_init(priv);
3337         if (err) {
3338                 IWL_ERR(priv, "Unable to init EEPROM\n");
3339                 goto out_iounmap;
3340         }
3341         err = iwl_eeprom_check_version(priv);
3342         if (err)
3343                 goto out_free_eeprom;
3344
3345         /* extract MAC Address */
3346         iwl_eeprom_get_mac(priv, priv->mac_addr);
3347         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3348         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3349
3350         /************************
3351          * 5. Setup HW constants
3352          ************************/
3353         if (iwl_set_hw_params(priv)) {
3354                 IWL_ERR(priv, "failed to set hw parameters\n");
3355                 goto out_free_eeprom;
3356         }
3357
3358         /*******************
3359          * 6. Setup priv
3360          *******************/
3361
3362         err = iwl_init_drv(priv);
3363         if (err)
3364                 goto out_free_eeprom;
3365         /* At this point both hw and priv are initialized. */
3366
3367         /********************
3368          * 7. Setup services
3369          ********************/
3370         spin_lock_irqsave(&priv->lock, flags);
3371         iwl_disable_interrupts(priv);
3372         spin_unlock_irqrestore(&priv->lock, flags);
3373
3374         pci_enable_msi(priv->pci_dev);
3375
3376         iwl_alloc_isr_ict(priv);
3377         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3378                           IRQF_SHARED, DRV_NAME, priv);
3379         if (err) {
3380                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3381                 goto out_disable_msi;
3382         }
3383         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3384         if (err) {
3385                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3386                 goto out_free_irq;
3387         }
3388
3389         iwl_setup_deferred_work(priv);
3390         iwl_setup_rx_handlers(priv);
3391
3392         /**********************************
3393          * 8. Setup and register mac80211
3394          **********************************/
3395
3396         /* enable interrupts if needed: hw bug w/a */
3397         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3398         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3399                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3400                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3401         }
3402
3403         iwl_enable_interrupts(priv);
3404
3405         err = iwl_setup_mac(priv);
3406         if (err)
3407                 goto out_remove_sysfs;
3408
3409         err = iwl_dbgfs_register(priv, DRV_NAME);
3410         if (err)
3411                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3412
3413         /* If platform's RF_KILL switch is NOT set to KILL */
3414         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3415                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3416         else
3417                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3418
3419         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3420                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3421
3422         iwl_power_initialize(priv);
3423         iwl_tt_initialize(priv);
3424         return 0;
3425
3426  out_remove_sysfs:
3427         destroy_workqueue(priv->workqueue);
3428         priv->workqueue = NULL;
3429         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3430  out_free_irq:
3431         free_irq(priv->pci_dev->irq, priv);
3432         iwl_free_isr_ict(priv);
3433  out_disable_msi:
3434         pci_disable_msi(priv->pci_dev);
3435         iwl_uninit_drv(priv);
3436  out_free_eeprom:
3437         iwl_eeprom_free(priv);
3438  out_iounmap:
3439         pci_iounmap(pdev, priv->hw_base);
3440  out_pci_release_regions:
3441         pci_set_drvdata(pdev, NULL);
3442         pci_release_regions(pdev);
3443  out_pci_disable_device:
3444         pci_disable_device(pdev);
3445  out_ieee80211_free_hw:
3446         iwl_free_traffic_mem(priv);
3447         ieee80211_free_hw(priv->hw);
3448  out:
3449         return err;
3450 }
3451
3452 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3453 {
3454         struct iwl_priv *priv = pci_get_drvdata(pdev);
3455         unsigned long flags;
3456
3457         if (!priv)
3458                 return;
3459
3460         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3461
3462         iwl_dbgfs_unregister(priv);
3463         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3464
3465         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3466          * to be called and iwl_down since we are removing the device
3467          * we need to set STATUS_EXIT_PENDING bit.
3468          */
3469         set_bit(STATUS_EXIT_PENDING, &priv->status);
3470         if (priv->mac80211_registered) {
3471                 ieee80211_unregister_hw(priv->hw);
3472                 priv->mac80211_registered = 0;
3473         } else {
3474                 iwl_down(priv);
3475         }
3476
3477         /*
3478          * Make sure device is reset to low power before unloading driver.
3479          * This may be redundant with iwl_down(), but there are paths to
3480          * run iwl_down() without calling apm_ops.stop(), and there are
3481          * paths to avoid running iwl_down() at all before leaving driver.
3482          * This (inexpensive) call *makes sure* device is reset.
3483          */
3484         priv->cfg->ops->lib->apm_ops.stop(priv);
3485
3486         iwl_tt_exit(priv);
3487
3488         /* make sure we flush any pending irq or
3489          * tasklet for the driver
3490          */
3491         spin_lock_irqsave(&priv->lock, flags);
3492         iwl_disable_interrupts(priv);
3493         spin_unlock_irqrestore(&priv->lock, flags);
3494
3495         iwl_synchronize_irq(priv);
3496
3497         iwl_dealloc_ucode_pci(priv);
3498
3499         if (priv->rxq.bd)
3500                 iwl_rx_queue_free(priv, &priv->rxq);
3501         iwl_hw_txq_ctx_free(priv);
3502
3503         iwl_clear_stations_table(priv);
3504         iwl_eeprom_free(priv);
3505
3506
3507         /*netif_stop_queue(dev); */
3508         flush_workqueue(priv->workqueue);
3509
3510         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3511          * priv->workqueue... so we can't take down the workqueue
3512          * until now... */
3513         destroy_workqueue(priv->workqueue);
3514         priv->workqueue = NULL;
3515         iwl_free_traffic_mem(priv);
3516
3517         free_irq(priv->pci_dev->irq, priv);
3518         pci_disable_msi(priv->pci_dev);
3519         pci_iounmap(pdev, priv->hw_base);
3520         pci_release_regions(pdev);
3521         pci_disable_device(pdev);
3522         pci_set_drvdata(pdev, NULL);
3523
3524         iwl_uninit_drv(priv);
3525
3526         iwl_free_isr_ict(priv);
3527
3528         if (priv->ibss_beacon)
3529                 dev_kfree_skb(priv->ibss_beacon);
3530
3531         ieee80211_free_hw(priv->hw);
3532 }
3533
3534
3535 /*****************************************************************************
3536  *
3537  * driver and module entry point
3538  *
3539  *****************************************************************************/
3540
3541 /* Hardware specific file defines the PCI IDs table for that hardware module */
3542 static struct pci_device_id iwl_hw_card_ids[] = {
3543 #ifdef CONFIG_IWL4965
3544         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3545         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3546 #endif /* CONFIG_IWL4965 */
3547 #ifdef CONFIG_IWL5000
3548         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3549         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3550         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3551         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3552         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3553         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3554         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3555         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3556         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3557         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3558 /* 5350 WiFi/WiMax */
3559         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3560         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3561         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3562 /* 5150 Wifi/WiMax */
3563         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3564         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3565
3566 /* 6x00 Series */
3567         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3568         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3569         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3570         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3571         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3572         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3573         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3574         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3575         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3576         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3577
3578 /* 6x50 WiFi/WiMax Series */
3579         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3580         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3581         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3582         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3583         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3584         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3585
3586 /* 1000 Series WiFi */
3587         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3588         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3589         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3590         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3591         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3592         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3593         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3594         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3595         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3596         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3597         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3598         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3599 #endif /* CONFIG_IWL5000 */
3600
3601         {0}
3602 };
3603 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3604
3605 static struct pci_driver iwl_driver = {
3606         .name = DRV_NAME,
3607         .id_table = iwl_hw_card_ids,
3608         .probe = iwl_pci_probe,
3609         .remove = __devexit_p(iwl_pci_remove),
3610 #ifdef CONFIG_PM
3611         .suspend = iwl_pci_suspend,
3612         .resume = iwl_pci_resume,
3613 #endif
3614 };
3615
3616 static int __init iwl_init(void)
3617 {
3618
3619         int ret;
3620         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3621         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3622
3623         ret = iwlagn_rate_control_register();
3624         if (ret) {
3625                 printk(KERN_ERR DRV_NAME
3626                        "Unable to register rate control algorithm: %d\n", ret);
3627                 return ret;
3628         }
3629
3630         ret = pci_register_driver(&iwl_driver);
3631         if (ret) {
3632                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3633                 goto error_register;
3634         }
3635
3636         return ret;
3637
3638 error_register:
3639         iwlagn_rate_control_unregister();
3640         return ret;
3641 }
3642
3643 static void __exit iwl_exit(void)
3644 {
3645         pci_unregister_driver(&iwl_driver);
3646         iwlagn_rate_control_unregister();
3647 }
3648
3649 module_exit(iwl_exit);
3650 module_init(iwl_init);
3651
3652 #ifdef CONFIG_IWLWIFI_DEBUG
3653 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3654 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3655 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3656 MODULE_PARM_DESC(debug, "debug output mask");
3657 #endif
3658