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         /* If we don't need to send a full RXON, we can use
 126          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 127          * and other flags for the current radio configuration. */
 128         if (!iwl_full_rxon_required(priv)) {
 129                 ret = iwl_send_rxon_assoc(priv);
 130                 if (ret) {
 131                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 132                         return ret;
 133                 }
 134
 135                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 136                 return 0;
 137         }
 138
 139         /* station table will be cleared */
 140         priv->assoc_station_added = 0;
 141
 142         /* If we are currently associated and the new config requires
 143          * an RXON_ASSOC and the new config wants the associated mask enabled,
 144          * we must clear the associated from the active configuration
 145          * before we apply the new config */
 146         if (iwl_is_associated(priv) && new_assoc) {
 147                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 148                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 149
 150                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 151                                       sizeof(struct iwl_rxon_cmd),
 152                                       &priv->active_rxon);
 153
 154                 /* If the mask clearing failed then we set
 155                  * active_rxon back to what it was previously */
 156                 if (ret) {
 157                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 158                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 159                         return ret;
 160                 }
 161         }
 162
 163         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 164                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 165                        "* channel = %d\n"
 166                        "* bssid = %pM\n",
 167                        (new_assoc ? "" : "out"),
 168                        le16_to_cpu(priv->staging_rxon.channel),
 169                        priv->staging_rxon.bssid_addr);
 170
 171         iwl_set_rxon_hwcrypto(priv, !priv->cfg->mod_params->sw_crypto);
 172
 173         /* Apply the new configuration
 174          * RXON unassoc clears the station table in uCode, send it before
 175          * we add the bcast station. If assoc bit is set, we will send RXON
 176          * after having added the bcast and bssid station.
 177          */
 178         if (!new_assoc) {
 179                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 180                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 181                 if (ret) {
 182                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 183                         return ret;
 184                 }
 185                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 186         }
 187
 188         iwl_clear_stations_table(priv);
 189
 190         priv->start_calib = 0;
 191
 192         /* Add the broadcast address so we can send broadcast frames */
 193         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 194                                                 IWL_INVALID_STATION) {
 195                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 196                 return -EIO;
 197         }
 198
 199         /* If we have set the ASSOC_MSK and we are in BSS mode then
 200          * add the IWL_AP_ID to the station rate table */
 201         if (new_assoc) {
 202                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 203                         ret = iwl_rxon_add_station(priv,
 204                                            priv->active_rxon.bssid_addr, 1);
 205                         if (ret == IWL_INVALID_STATION) {
 206                                 IWL_ERR(priv,
 207                                         "Error adding AP address for TX.\n");
 208                                 return -EIO;
 209                         }
 210                         priv->assoc_station_added = 1;
 211                         if (priv->default_wep_key &&
 212                             iwl_send_static_wepkey_cmd(priv, 0))
 213                                 IWL_ERR(priv,
 214                                         "Could not send WEP static key.\n");
 215                 }
 216
 217                 /*
 218                  * allow CTS-to-self if possible for new association.
 219                  * this is relevant only for 5000 series and up,
 220                  * but will not damage 4965
 221                  */
 222                 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 223
 224                 /* Apply the new configuration
 225                  * RXON assoc doesn't clear the station table in uCode,
 226                  */
 227                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 228                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 229                 if (ret) {
 230                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 231                         return ret;
 232                 }
 233                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 234         }
 235
 236         iwl_init_sensitivity(priv);
 237
 238         /* If we issue a new RXON command which required a tune then we must
 239          * send a new TXPOWER command or we won't be able to Tx any frames */
 240         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 241         if (ret) {
 242                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 243                 return ret;
 244         }
 245
 246         return 0;
 247 }
 248
 249 void iwl_update_chain_flags(struct iwl_priv *priv)
 250 {
 251
 252         if (priv->cfg->ops->hcmd->set_rxon_chain)
 253                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 254         iwlcore_commit_rxon(priv);
 255 }
 256
 257 static void iwl_clear_free_frames(struct iwl_priv *priv)
 258 {
 259         struct list_head *element;
 260
 261         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 262                        priv->frames_count);
 263
 264         while (!list_empty(&priv->free_frames)) {
 265                 element = priv->free_frames.next;
 266                 list_del(element);
 267                 kfree(list_entry(element, struct iwl_frame, list));
 268                 priv->frames_count--;
 269         }
 270
 271         if (priv->frames_count) {
 272                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 273                             priv->frames_count);
 274                 priv->frames_count = 0;
 275         }
 276 }
 277
 278 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 279 {
 280         struct iwl_frame *frame;
 281         struct list_head *element;
 282         if (list_empty(&priv->free_frames)) {
 283                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 284                 if (!frame) {
 285                         IWL_ERR(priv, "Could not allocate frame!\n");
 286                         return NULL;
 287                 }
 288
 289                 priv->frames_count++;
 290                 return frame;
 291         }
 292
 293         element = priv->free_frames.next;
 294         list_del(element);
 295         return list_entry(element, struct iwl_frame, list);
 296 }
 297
 298 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 299 {
 300         memset(frame, 0, sizeof(*frame));
 301         list_add(&frame->list, &priv->free_frames);
 302 }
 303
 304 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 305                                           struct ieee80211_hdr *hdr,
 306                                           int left)
 307 {
 308         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 309             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 310              (priv->iw_mode != NL80211_IFTYPE_AP)))
 311                 return 0;
 312
 313         if (priv->ibss_beacon->len > left)
 314                 return 0;
 315
 316         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 317
 318         return priv->ibss_beacon->len;
 319 }
 320
 321 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 322                                        struct iwl_frame *frame, u8 rate)
 323 {
 324         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 325         unsigned int frame_size;
 326
 327         tx_beacon_cmd = &frame->u.beacon;
 328         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 329
 330         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 331         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 332
 333         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 334                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 335
 336         BUG_ON(frame_size > MAX_MPDU_SIZE);
 337         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 338
 339         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 340                 tx_beacon_cmd->tx.rate_n_flags =
 341                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 342         else
 343                 tx_beacon_cmd->tx.rate_n_flags =
 344                         iwl_hw_set_rate_n_flags(rate, 0);
 345
 346         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 347                                      TX_CMD_FLG_TSF_MSK |
 348                                      TX_CMD_FLG_STA_RATE_MSK;
 349
 350         return sizeof(*tx_beacon_cmd) + frame_size;
 351 }
 352 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 353 {
 354         struct iwl_frame *frame;
 355         unsigned int frame_size;
 356         int rc;
 357         u8 rate;
 358
 359         frame = iwl_get_free_frame(priv);
 360
 361         if (!frame) {
 362                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 363                           "command.\n");
 364                 return -ENOMEM;
 365         }
 366
 367         rate = iwl_rate_get_lowest_plcp(priv);
 368
 369         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 370
 371         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 372                               &frame->u.cmd[0]);
 373
 374         iwl_free_frame(priv, frame);
 375
 376         return rc;
 377 }
 378
 379 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 380 {
 381         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 382
 383         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 384         if (sizeof(dma_addr_t) > sizeof(u32))
 385                 addr |=
 386                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 387
 388         return addr;
 389 }
 390
 391 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 392 {
 393         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 394
 395         return le16_to_cpu(tb->hi_n_len) >> 4;
 396 }
 397
 398 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 399                                   dma_addr_t addr, u16 len)
 400 {
 401         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 402         u16 hi_n_len = len << 4;
 403
 404         put_unaligned_le32(addr, &tb->lo);
 405         if (sizeof(dma_addr_t) > sizeof(u32))
 406                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 407
 408         tb->hi_n_len = cpu_to_le16(hi_n_len);
 409
 410         tfd->num_tbs = idx + 1;
 411 }
 412
 413 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 414 {
 415         return tfd->num_tbs & 0x1f;
 416 }
 417
 418 /**
 419  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 420  * @priv - driver private data
 421  * @txq - tx queue
 422  *
 423  * Does NOT advance any TFD circular buffer read/write indexes
 424  * Does NOT free the TFD itself (which is within circular buffer)
 425  */
 426 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 427 {
 428         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 429         struct iwl_tfd *tfd;
 430         struct pci_dev *dev = priv->pci_dev;
 431         int index = txq->q.read_ptr;
 432         int i;
 433         int num_tbs;
 434
 435         tfd = &tfd_tmp[index];
 436
 437         /* Sanity check on number of chunks */
 438         num_tbs = iwl_tfd_get_num_tbs(tfd);
 439
 440         if (num_tbs >= IWL_NUM_OF_TBS) {
 441                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 442                 /* @todo issue fatal error, it is quite serious situation */
 443                 return;
 444         }
 445
 446         /* Unmap tx_cmd */
 447         if (num_tbs)
 448                 pci_unmap_single(dev,
 449                                 pci_unmap_addr(&txq->meta[index], mapping),
 450                                 pci_unmap_len(&txq->meta[index], len),
 451                                 PCI_DMA_BIDIRECTIONAL);
 452
 453         /* Unmap chunks, if any. */
 454         for (i = 1; i < num_tbs; i++) {
 455                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 456                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 457
 458                 if (txq->txb) {
 459                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 460                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 461                 }
 462         }
 463 }
 464
 465 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 466                                  struct iwl_tx_queue *txq,
 467                                  dma_addr_t addr, u16 len,
 468                                  u8 reset, u8 pad)
 469 {
 470         struct iwl_queue *q;
 471         struct iwl_tfd *tfd, *tfd_tmp;
 472         u32 num_tbs;
 473
 474         q = &txq->q;
 475         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 476         tfd = &tfd_tmp[q->write_ptr];
 477
 478         if (reset)
 479                 memset(tfd, 0, sizeof(*tfd));
 480
 481         num_tbs = iwl_tfd_get_num_tbs(tfd);
 482
 483         /* Each TFD can point to a maximum 20 Tx buffers */
 484         if (num_tbs >= IWL_NUM_OF_TBS) {
 485                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 486                           IWL_NUM_OF_TBS);
 487                 return -EINVAL;
 488         }
 489
 490         BUG_ON(addr & ~DMA_BIT_MASK(36));
 491         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 492                 IWL_ERR(priv, "Unaligned address = %llx\n",
 493                           (unsigned long long)addr);
 494
 495         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 496
 497         return 0;
 498 }
 499
 500 /*
 501  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 502  * given Tx queue, and enable the DMA channel used for that queue.
 503  *
 504  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 505  * channels supported in hardware.
 506  */
 507 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 508                          struct iwl_tx_queue *txq)
 509 {
 510         int txq_id = txq->q.id;
 511
 512         /* Circular buffer (TFD queue in DRAM) physical base address */
 513         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 514                              txq->q.dma_addr >> 8);
 515
 516         return 0;
 517 }
 518
 519 /******************************************************************************
 520  *
 521  * Generic RX handler implementations
 522  *
 523  ******************************************************************************/
 524 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 525                                 struct iwl_rx_mem_buffer *rxb)
 526 {
 527         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 528         struct iwl_alive_resp *palive;
 529         struct delayed_work *pwork;
 530
 531         palive = &pkt->u.alive_frame;
 532
 533         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 534                        "0x%01X 0x%01X\n",
 535                        palive->is_valid, palive->ver_type,
 536                        palive->ver_subtype);
 537
 538         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 539                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 540                 memcpy(&priv->card_alive_init,
 541                        &pkt->u.alive_frame,
 542                        sizeof(struct iwl_init_alive_resp));
 543                 pwork = &priv->init_alive_start;
 544         } else {
 545                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 546                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 547                        sizeof(struct iwl_alive_resp));
 548                 pwork = &priv->alive_start;
 549         }
 550
 551         /* We delay the ALIVE response by 5ms to
 552          * give the HW RF Kill time to activate... */
 553         if (palive->is_valid == UCODE_VALID_OK)
 554                 queue_delayed_work(priv->workqueue, pwork,
 555                                    msecs_to_jiffies(5));
 556         else
 557                 IWL_WARN(priv, "uCode did not respond OK.\n");
 558 }
 559
 560 static void iwl_bg_beacon_update(struct work_struct *work)
 561 {
 562         struct iwl_priv *priv =
 563                 container_of(work, struct iwl_priv, beacon_update);
 564         struct sk_buff *beacon;
 565
 566         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 567         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 568
 569         if (!beacon) {
 570                 IWL_ERR(priv, "update beacon failed\n");
 571                 return;
 572         }
 573
 574         mutex_lock(&priv->mutex);
 575         /* new beacon skb is allocated every time; dispose previous.*/
 576         if (priv->ibss_beacon)
 577                 dev_kfree_skb(priv->ibss_beacon);
 578
 579         priv->ibss_beacon = beacon;
 580         mutex_unlock(&priv->mutex);
 581
 582         iwl_send_beacon_cmd(priv);
 583 }
 584
 585 /**
 586  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 587  *
 588  * This callback is provided in order to send a statistics request.
 589  *
 590  * This timer function is continually reset to execute within
 591  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 592  * was received.  We need to ensure we receive the statistics in order
 593  * to update the temperature used for calibrating the TXPOWER.
 594  */
 595 static void iwl_bg_statistics_periodic(unsigned long data)
 596 {
 597         struct iwl_priv *priv = (struct iwl_priv *)data;
 598
 599         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 600                 return;
 601
 602         /* dont send host command if rf-kill is on */
 603         if (!iwl_is_ready_rf(priv))
 604                 return;
 605
 606         iwl_send_statistics_request(priv, CMD_ASYNC);
 607 }
 608
 609 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 610                                 struct iwl_rx_mem_buffer *rxb)
 611 {
 612 #ifdef CONFIG_IWLWIFI_DEBUG
 613         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 614         struct iwl4965_beacon_notif *beacon =
 615                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 616         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 617
 618         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 619                 "tsf %d %d rate %d\n",
 620                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 621                 beacon->beacon_notify_hdr.failure_frame,
 622                 le32_to_cpu(beacon->ibss_mgr_status),
 623                 le32_to_cpu(beacon->high_tsf),
 624                 le32_to_cpu(beacon->low_tsf), rate);
 625 #endif
 626
 627         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 628             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 629                 queue_work(priv->workqueue, &priv->beacon_update);
 630 }
 631
 632 /* Handle notification from uCode that card's power state is changing
 633  * due to software, hardware, or critical temperature RFKILL */
 634 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 635                                     struct iwl_rx_mem_buffer *rxb)
 636 {
 637         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 638         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 639         unsigned long status = priv->status;
 640
 641         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 642                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 643                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 644
 645         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 646                      RF_CARD_DISABLED)) {
 647
 648                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 649                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 650
 651                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 652                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 653
 654                 if (!(flags & RXON_CARD_DISABLED)) {
 655                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 656                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 657                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 658                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 659                 }
 660                 if (flags & RF_CARD_DISABLED)
 661                         iwl_tt_enter_ct_kill(priv);
 662         }
 663         if (!(flags & RF_CARD_DISABLED))
 664                 iwl_tt_exit_ct_kill(priv);
 665
 666         if (flags & HW_CARD_DISABLED)
 667                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 668         else
 669                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 670
 671
 672         if (!(flags & RXON_CARD_DISABLED))
 673                 iwl_scan_cancel(priv);
 674
 675         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 676              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 677                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 678                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 679         else
 680                 wake_up_interruptible(&priv->wait_command_queue);
 681 }
 682
 683 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 684 {
 685         if (src == IWL_PWR_SRC_VAUX) {
 686                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 687                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 688                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 689                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 690         } else {
 691                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 692                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 693                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 694         }
 695
 696         return 0;
 697 }
 698
 699 /**
 700  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 701  *
 702  * Setup the RX handlers for each of the reply types sent from the uCode
 703  * to the host.
 704  *
 705  * This function chains into the hardware specific files for them to setup
 706  * any hardware specific handlers as well.
 707  */
 708 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 709 {
 710         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 711         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 712         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 713         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 714         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 715             iwl_rx_pm_debug_statistics_notif;
 716         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 717
 718         /*
 719          * The same handler is used for both the REPLY to a discrete
 720          * statistics request from the host as well as for the periodic
 721          * statistics notifications (after received beacons) from the uCode.
 722          */
 723         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 724         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 725
 726         iwl_setup_spectrum_handlers(priv);
 727         iwl_setup_rx_scan_handlers(priv);
 728
 729         /* status change handler */
 730         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 731
 732         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 733             iwl_rx_missed_beacon_notif;
 734         /* Rx handlers */
 735         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 736         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 737         /* block ack */
 738         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 739         /* Set up hardware specific Rx handlers */
 740         priv->cfg->ops->lib->rx_handler_setup(priv);
 741 }
 742
 743 /**
 744  * iwl_rx_handle - Main entry function for receiving responses from uCode
 745  *
 746  * Uses the priv->rx_handlers callback function array to invoke
 747  * the appropriate handlers, including command responses,
 748  * frame-received notifications, and other notifications.
 749  */
 750 void iwl_rx_handle(struct iwl_priv *priv)
 751 {
 752         struct iwl_rx_mem_buffer *rxb;
 753         struct iwl_rx_packet *pkt;
 754         struct iwl_rx_queue *rxq = &priv->rxq;
 755         u32 r, i;
 756         int reclaim;
 757         unsigned long flags;
 758         u8 fill_rx = 0;
 759         u32 count = 8;
 760         int total_empty;
 761
 762         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 763          * buffer that the driver may process (last buffer filled by ucode). */
 764         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 765         i = rxq->read;
 766
 767         /* Rx interrupt, but nothing sent from uCode */
 768         if (i == r)
 769                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 770
 771         /* calculate total frames need to be restock after handling RX */
 772         total_empty = r - priv->rxq.write_actual;
 773         if (total_empty < 0)
 774                 total_empty += RX_QUEUE_SIZE;
 775
 776         if (total_empty > (RX_QUEUE_SIZE / 2))
 777                 fill_rx = 1;
 778
 779         while (i != r) {
 780                 rxb = rxq->queue[i];
 781
 782                 /* If an RXB doesn't have a Rx queue slot associated with it,
 783                  * then a bug has been introduced in the queue refilling
 784                  * routines -- catch it here */
 785                 BUG_ON(rxb == NULL);
 786
 787                 rxq->queue[i] = NULL;
 788
 789                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
 790                                  priv->hw_params.rx_buf_size + 256,
 791                                  PCI_DMA_FROMDEVICE);
 792                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 793
 794                 trace_iwlwifi_dev_rx(priv, pkt,
 795                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
 796
 797                 /* Reclaim a command buffer only if this packet is a response
 798                  *   to a (driver-originated) command.
 799                  * If the packet (e.g. Rx frame) originated from uCode,
 800                  *   there is no command buffer to reclaim.
 801                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 802                  *   but apparently a few don't get set; catch them here. */
 803                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 804                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 805                         (pkt->hdr.cmd != REPLY_RX) &&
 806                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 807                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 808                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 809                         (pkt->hdr.cmd != REPLY_TX);
 810
 811                 /* Based on type of command response or notification,
 812                  *   handle those that need handling via function in
 813                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 814                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 815                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 816                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 817                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 818                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 819                 } else {
 820                         /* No handling needed */
 821                         IWL_DEBUG_RX(priv,
 822                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 823                                 r, i, get_cmd_string(pkt->hdr.cmd),
 824                                 pkt->hdr.cmd);
 825                 }
 826
 827                 if (reclaim) {
 828                         /* Invoke any callbacks, transfer the skb to caller, and
 829                          * fire off the (possibly) blocking iwl_send_cmd()
 830                          * as we reclaim the driver command queue */
 831                         if (rxb && rxb->skb)
 832                                 iwl_tx_cmd_complete(priv, rxb);
 833                         else
 834                                 IWL_WARN(priv, "Claim null rxb?\n");
 835                 }
 836
 837                 /* For now we just don't re-use anything.  We can tweak this
 838                  * later to try and re-use notification packets and SKBs that
 839                  * fail to Rx correctly */
 840                 if (rxb->skb != NULL) {
 841                         priv->alloc_rxb_skb--;
 842                         dev_kfree_skb_any(rxb->skb);
 843                         rxb->skb = NULL;
 844                 }
 845
 846                 spin_lock_irqsave(&rxq->lock, flags);
 847                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
 848                 spin_unlock_irqrestore(&rxq->lock, flags);
 849                 i = (i + 1) & RX_QUEUE_MASK;
 850                 /* If there are a lot of unused frames,
 851                  * restock the Rx queue so ucode wont assert. */
 852                 if (fill_rx) {
 853                         count++;
 854                         if (count >= 8) {
 855                                 priv->rxq.read = i;
 856                                 iwl_rx_replenish_now(priv);
 857                                 count = 0;
 858                         }
 859                 }
 860         }
 861
 862         /* Backtrack one entry */
 863         priv->rxq.read = i;
 864         if (fill_rx)
 865                 iwl_rx_replenish_now(priv);
 866         else
 867                 iwl_rx_queue_restock(priv);
 868 }
 869
 870 /* call this function to flush any scheduled tasklet */
 871 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 872 {
 873         /* wait to make sure we flush pending tasklet*/
 874         synchronize_irq(priv->pci_dev->irq);
 875         tasklet_kill(&priv->irq_tasklet);
 876 }
 877
 878 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
 879 {
 880         u32 inta, handled = 0;
 881         u32 inta_fh;
 882         unsigned long flags;
 883 #ifdef CONFIG_IWLWIFI_DEBUG
 884         u32 inta_mask;
 885 #endif
 886
 887         spin_lock_irqsave(&priv->lock, flags);
 888
 889         /* Ack/clear/reset pending uCode interrupts.
 890          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 891          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
 892         inta = iwl_read32(priv, CSR_INT);
 893         iwl_write32(priv, CSR_INT, inta);
 894
 895         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
 896          * Any new interrupts that happen after this, either while we're
 897          * in this tasklet, or later, will show up in next ISR/tasklet. */
 898         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
 899         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
 900
 901 #ifdef CONFIG_IWLWIFI_DEBUG
 902         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
 903                 /* just for debug */
 904                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 905                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
 906                               inta, inta_mask, inta_fh);
 907         }
 908 #endif
 909
 910         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
 911          * atomic, make sure that inta covers all the interrupts that
 912          * we've discovered, even if FH interrupt came in just after
 913          * reading CSR_INT. */
 914         if (inta_fh & CSR49_FH_INT_RX_MASK)
 915                 inta |= CSR_INT_BIT_FH_RX;
 916         if (inta_fh & CSR49_FH_INT_TX_MASK)
 917                 inta |= CSR_INT_BIT_FH_TX;
 918
 919         /* Now service all interrupt bits discovered above. */
 920         if (inta & CSR_INT_BIT_HW_ERR) {
 921                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 922
 923                 /* Tell the device to stop sending interrupts */
 924                 iwl_disable_interrupts(priv);
 925
 926                 priv->isr_stats.hw++;
 927                 iwl_irq_handle_error(priv);
 928
 929                 handled |= CSR_INT_BIT_HW_ERR;
 930
 931                 spin_unlock_irqrestore(&priv->lock, flags);
 932
 933                 return;
 934         }
 935
 936 #ifdef CONFIG_IWLWIFI_DEBUG
 937         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
 938                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
 939                 if (inta & CSR_INT_BIT_SCD) {
 940                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
 941                                       "the frame/frames.\n");
 942                         priv->isr_stats.sch++;
 943                 }
 944
 945                 /* Alive notification via Rx interrupt will do the real work */
 946                 if (inta & CSR_INT_BIT_ALIVE) {
 947                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
 948                         priv->isr_stats.alive++;
 949                 }
 950         }
 951 #endif
 952         /* Safely ignore these bits for debug checks below */
 953         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
 954
 955         /* HW RF KILL switch toggled */
 956         if (inta & CSR_INT_BIT_RF_KILL) {
 957                 int hw_rf_kill = 0;
 958                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
 959                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
 960                         hw_rf_kill = 1;
 961
 962                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
 963                                 hw_rf_kill ? "disable radio" : "enable radio");
 964
 965                 priv->isr_stats.rfkill++;
 966
 967                 /* driver only loads ucode once setting the interface up.
 968                  * the driver allows loading the ucode even if the radio
 969                  * is killed. Hence update the killswitch state here. The
 970                  * rfkill handler will care about restarting if needed.
 971                  */
 972                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
 973                         if (hw_rf_kill)
 974                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 975                         else
 976                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 977                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
 978                 }
 979
 980                 handled |= CSR_INT_BIT_RF_KILL;
 981         }
 982
 983         /* Chip got too hot and stopped itself */
 984         if (inta & CSR_INT_BIT_CT_KILL) {
 985                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
 986                 priv->isr_stats.ctkill++;
 987                 handled |= CSR_INT_BIT_CT_KILL;
 988         }
 989
 990         /* Error detected by uCode */
 991         if (inta & CSR_INT_BIT_SW_ERR) {
 992                 IWL_ERR(priv, "Microcode SW error detected. "
 993                         " Restarting 0x%X.\n", inta);
 994                 priv->isr_stats.sw++;
 995                 priv->isr_stats.sw_err = inta;
 996                 iwl_irq_handle_error(priv);
 997                 handled |= CSR_INT_BIT_SW_ERR;
 998         }
 999
1000         /* uCode wakes up after power-down sleep */
1001         if (inta & CSR_INT_BIT_WAKEUP) {
1002                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1003                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1004                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1005                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1006                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1007                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1008                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1009                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1010
1011                 priv->isr_stats.wakeup++;
1012
1013                 handled |= CSR_INT_BIT_WAKEUP;
1014         }
1015
1016         /* All uCode command responses, including Tx command responses,
1017          * Rx "responses" (frame-received notification), and other
1018          * notifications from uCode come through here*/
1019         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1020                 iwl_rx_handle(priv);
1021                 priv->isr_stats.rx++;
1022                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1023         }
1024
1025         if (inta & CSR_INT_BIT_FH_TX) {
1026                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1027                 priv->isr_stats.tx++;
1028                 handled |= CSR_INT_BIT_FH_TX;
1029                 /* FH finished to write, send event */
1030                 priv->ucode_write_complete = 1;
1031                 wake_up_interruptible(&priv->wait_command_queue);
1032         }
1033
1034         if (inta & ~handled) {
1035                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1036                 priv->isr_stats.unhandled++;
1037         }
1038
1039         if (inta & ~(priv->inta_mask)) {
1040                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1041                          inta & ~priv->inta_mask);
1042                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1043         }
1044
1045         /* Re-enable all interrupts */
1046         /* only Re-enable if diabled by irq */
1047         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1048                 iwl_enable_interrupts(priv);
1049
1050 #ifdef CONFIG_IWLWIFI_DEBUG
1051         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1052                 inta = iwl_read32(priv, CSR_INT);
1053                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1054                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1055                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1056                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1057         }
1058 #endif
1059         spin_unlock_irqrestore(&priv->lock, flags);
1060 }
1061
1062 /* tasklet for iwlagn interrupt */
1063 static void iwl_irq_tasklet(struct iwl_priv *priv)
1064 {
1065         u32 inta = 0;
1066         u32 handled = 0;
1067         unsigned long flags;
1068 #ifdef CONFIG_IWLWIFI_DEBUG
1069         u32 inta_mask;
1070 #endif
1071
1072         spin_lock_irqsave(&priv->lock, flags);
1073
1074         /* Ack/clear/reset pending uCode interrupts.
1075          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1076          */
1077         iwl_write32(priv, CSR_INT, priv->inta);
1078
1079         inta = priv->inta;
1080
1081 #ifdef CONFIG_IWLWIFI_DEBUG
1082         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1083                 /* just for debug */
1084                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1085                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1086                                 inta, inta_mask);
1087         }
1088 #endif
1089         /* saved interrupt in inta variable now we can reset priv->inta */
1090         priv->inta = 0;
1091
1092         /* Now service all interrupt bits discovered above. */
1093         if (inta & CSR_INT_BIT_HW_ERR) {
1094                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1095
1096                 /* Tell the device to stop sending interrupts */
1097                 iwl_disable_interrupts(priv);
1098
1099                 priv->isr_stats.hw++;
1100                 iwl_irq_handle_error(priv);
1101
1102                 handled |= CSR_INT_BIT_HW_ERR;
1103
1104                 spin_unlock_irqrestore(&priv->lock, flags);
1105
1106                 return;
1107         }
1108
1109 #ifdef CONFIG_IWLWIFI_DEBUG
1110         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1111                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1112                 if (inta & CSR_INT_BIT_SCD) {
1113                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1114                                       "the frame/frames.\n");
1115                         priv->isr_stats.sch++;
1116                 }
1117
1118                 /* Alive notification via Rx interrupt will do the real work */
1119                 if (inta & CSR_INT_BIT_ALIVE) {
1120                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1121                         priv->isr_stats.alive++;
1122                 }
1123         }
1124 #endif
1125         /* Safely ignore these bits for debug checks below */
1126         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1127
1128         /* HW RF KILL switch toggled */
1129         if (inta & CSR_INT_BIT_RF_KILL) {
1130                 int hw_rf_kill = 0;
1131                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1132                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1133                         hw_rf_kill = 1;
1134
1135                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1136                                 hw_rf_kill ? "disable radio" : "enable radio");
1137
1138                 priv->isr_stats.rfkill++;
1139
1140                 /* driver only loads ucode once setting the interface up.
1141                  * the driver allows loading the ucode even if the radio
1142                  * is killed. Hence update the killswitch state here. The
1143                  * rfkill handler will care about restarting if needed.
1144                  */
1145                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1146                         if (hw_rf_kill)
1147                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1148                         else
1149                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1150                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1151                 }
1152
1153                 handled |= CSR_INT_BIT_RF_KILL;
1154         }
1155
1156         /* Chip got too hot and stopped itself */
1157         if (inta & CSR_INT_BIT_CT_KILL) {
1158                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1159                 priv->isr_stats.ctkill++;
1160                 handled |= CSR_INT_BIT_CT_KILL;
1161         }
1162
1163         /* Error detected by uCode */
1164         if (inta & CSR_INT_BIT_SW_ERR) {
1165                 IWL_ERR(priv, "Microcode SW error detected. "
1166                         " Restarting 0x%X.\n", inta);
1167                 priv->isr_stats.sw++;
1168                 priv->isr_stats.sw_err = inta;
1169                 iwl_irq_handle_error(priv);
1170                 handled |= CSR_INT_BIT_SW_ERR;
1171         }
1172
1173         /* uCode wakes up after power-down sleep */
1174         if (inta & CSR_INT_BIT_WAKEUP) {
1175                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1176                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1177                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1178                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1179                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1180                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1181                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1182                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1183
1184                 priv->isr_stats.wakeup++;
1185
1186                 handled |= CSR_INT_BIT_WAKEUP;
1187         }
1188
1189         /* All uCode command responses, including Tx command responses,
1190          * Rx "responses" (frame-received notification), and other
1191          * notifications from uCode come through here*/
1192         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1193                         CSR_INT_BIT_RX_PERIODIC)) {
1194                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1195                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1196                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1197                         iwl_write32(priv, CSR_FH_INT_STATUS,
1198                                         CSR49_FH_INT_RX_MASK);
1199                 }
1200                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1201                         handled |= CSR_INT_BIT_RX_PERIODIC;
1202                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1203                 }
1204                 /* Sending RX interrupt require many steps to be done in the
1205                  * the device:
1206                  * 1- write interrupt to current index in ICT table.
1207                  * 2- dma RX frame.
1208                  * 3- update RX shared data to indicate last write index.
1209                  * 4- send interrupt.
1210                  * This could lead to RX race, driver could receive RX interrupt
1211                  * but the shared data changes does not reflect this.
1212                  * this could lead to RX race, RX periodic will solve this race
1213                  */
1214                 iwl_write32(priv, CSR_INT_PERIODIC_REG,
1215                             CSR_INT_PERIODIC_DIS);
1216                 iwl_rx_handle(priv);
1217                 /* Only set RX periodic if real RX is received. */
1218                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1219                         iwl_write32(priv, CSR_INT_PERIODIC_REG,
1220                                     CSR_INT_PERIODIC_ENA);
1221
1222                 priv->isr_stats.rx++;
1223         }
1224
1225         if (inta & CSR_INT_BIT_FH_TX) {
1226                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1227                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1228                 priv->isr_stats.tx++;
1229                 handled |= CSR_INT_BIT_FH_TX;
1230                 /* FH finished to write, send event */
1231                 priv->ucode_write_complete = 1;
1232                 wake_up_interruptible(&priv->wait_command_queue);
1233         }
1234
1235         if (inta & ~handled) {
1236                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1237                 priv->isr_stats.unhandled++;
1238         }
1239
1240         if (inta & ~(priv->inta_mask)) {
1241                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1242                          inta & ~priv->inta_mask);
1243         }
1244
1245
1246         /* Re-enable all interrupts */
1247         /* only Re-enable if diabled by irq */
1248         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1249                 iwl_enable_interrupts(priv);
1250
1251         spin_unlock_irqrestore(&priv->lock, flags);
1252
1253 }
1254
1255
1256 /******************************************************************************
1257  *
1258  * uCode download functions
1259  *
1260  ******************************************************************************/
1261
1262 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1263 {
1264         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1265         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1266         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1267         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1268         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1269         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1270 }
1271
1272 static void iwl_nic_start(struct iwl_priv *priv)
1273 {
1274         /* Remove all resets to allow NIC to operate */
1275         iwl_write32(priv, CSR_RESET, 0);
1276 }
1277
1278
1279 /**
1280  * iwl_read_ucode - Read uCode images from disk file.
1281  *
1282  * Copy into buffers for card to fetch via bus-mastering
1283  */
1284 static int iwl_read_ucode(struct iwl_priv *priv)
1285 {
1286         struct iwl_ucode_header *ucode;
1287         int ret = -EINVAL, index;
1288         const struct firmware *ucode_raw;
1289         const char *name_pre = priv->cfg->fw_name_pre;
1290         const unsigned int api_max = priv->cfg->ucode_api_max;
1291         const unsigned int api_min = priv->cfg->ucode_api_min;
1292         char buf[25];
1293         u8 *src;
1294         size_t len;
1295         u32 api_ver, build;
1296         u32 inst_size, data_size, init_size, init_data_size, boot_size;
1297         u16 eeprom_ver;
1298
1299         /* Ask kernel firmware_class module to get the boot firmware off disk.
1300          * request_firmware() is synchronous, file is in memory on return. */
1301         for (index = api_max; index >= api_min; index--) {
1302                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1303                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1304                 if (ret < 0) {
1305                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1306                                   buf, ret);
1307                         if (ret == -ENOENT)
1308                                 continue;
1309                         else
1310                                 goto error;
1311                 } else {
1312                         if (index < api_max)
1313                                 IWL_ERR(priv, "Loaded firmware %s, "
1314                                         "which is deprecated. "
1315                                         "Please use API v%u instead.\n",
1316                                           buf, api_max);
1317
1318                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1319                                        buf, ucode_raw->size);
1320                         break;
1321                 }
1322         }
1323
1324         if (ret < 0)
1325                 goto error;
1326
1327         /* Make sure that we got at least the v1 header! */
1328         if (ucode_raw->size < priv->cfg->ops->ucode->get_header_size(1)) {
1329                 IWL_ERR(priv, "File size way too small!\n");
1330                 ret = -EINVAL;
1331                 goto err_release;
1332         }
1333
1334         /* Data from ucode file:  header followed by uCode images */
1335         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1336
1337         priv->ucode_ver = le32_to_cpu(ucode->ver);
1338         api_ver = IWL_UCODE_API(priv->ucode_ver);
1339         build = priv->cfg->ops->ucode->get_build(ucode, api_ver);
1340         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
1341         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
1342         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
1343         init_data_size =
1344                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
1345         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
1346         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
1347
1348         /* api_ver should match the api version forming part of the
1349          * firmware filename ... but we don't check for that and only rely
1350          * on the API version read from firmware header from here on forward */
1351
1352         if (api_ver < api_min || api_ver > api_max) {
1353                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1354                           "Driver supports v%u, firmware is v%u.\n",
1355                           api_max, api_ver);
1356                 priv->ucode_ver = 0;
1357                 ret = -EINVAL;
1358                 goto err_release;
1359         }
1360         if (api_ver != api_max)
1361                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1362                           "got v%u. New firmware can be obtained "
1363                           "from http://www.intellinuxwireless.org.\n",
1364                           api_max, api_ver);
1365
1366         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1367                IWL_UCODE_MAJOR(priv->ucode_ver),
1368                IWL_UCODE_MINOR(priv->ucode_ver),
1369                IWL_UCODE_API(priv->ucode_ver),
1370                IWL_UCODE_SERIAL(priv->ucode_ver));
1371
1372         if (build)
1373                 IWL_DEBUG_INFO(priv, "Build %u\n", build);
1374
1375         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
1376         IWL_DEBUG_INFO(priv, "NVM Type: %s, version: 0x%x\n",
1377                        (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
1378                        ? "OTP" : "EEPROM", eeprom_ver);
1379
1380         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1381                        priv->ucode_ver);
1382         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1383                        inst_size);
1384         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1385                        data_size);
1386         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1387                        init_size);
1388         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1389                        init_data_size);
1390         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1391                        boot_size);
1392
1393         /* Verify size of file vs. image size info in file's header */
1394         if (ucode_raw->size !=
1395                 priv->cfg->ops->ucode->get_header_size(api_ver) +
1396                 inst_size + data_size + init_size +
1397                 init_data_size + boot_size) {
1398
1399                 IWL_DEBUG_INFO(priv,
1400                         "uCode file size %d does not match expected size\n",
1401                         (int)ucode_raw->size);
1402                 ret = -EINVAL;
1403                 goto err_release;
1404         }
1405
1406         /* Verify that uCode images will fit in card's SRAM */
1407         if (inst_size > priv->hw_params.max_inst_size) {
1408                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1409                                inst_size);
1410                 ret = -EINVAL;
1411                 goto err_release;
1412         }
1413
1414         if (data_size > priv->hw_params.max_data_size) {
1415                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1416                                 data_size);
1417                 ret = -EINVAL;
1418                 goto err_release;
1419         }
1420         if (init_size > priv->hw_params.max_inst_size) {
1421                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1422                         init_size);
1423                 ret = -EINVAL;
1424                 goto err_release;
1425         }
1426         if (init_data_size > priv->hw_params.max_data_size) {
1427                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1428                       init_data_size);
1429                 ret = -EINVAL;
1430                 goto err_release;
1431         }
1432         if (boot_size > priv->hw_params.max_bsm_size) {
1433                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1434                         boot_size);
1435                 ret = -EINVAL;
1436                 goto err_release;
1437         }
1438
1439         /* Allocate ucode buffers for card's bus-master loading ... */
1440
1441         /* Runtime instructions and 2 copies of data:
1442          * 1) unmodified from disk
1443          * 2) backup cache for save/restore during power-downs */
1444         priv->ucode_code.len = inst_size;
1445         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1446
1447         priv->ucode_data.len = data_size;
1448         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1449
1450         priv->ucode_data_backup.len = data_size;
1451         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1452
1453         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1454             !priv->ucode_data_backup.v_addr)
1455                 goto err_pci_alloc;
1456
1457         /* Initialization instructions and data */
1458         if (init_size && init_data_size) {
1459                 priv->ucode_init.len = init_size;
1460                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1461
1462                 priv->ucode_init_data.len = init_data_size;
1463                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1464
1465                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1466                         goto err_pci_alloc;
1467         }
1468
1469         /* Bootstrap (instructions only, no data) */
1470         if (boot_size) {
1471                 priv->ucode_boot.len = boot_size;
1472                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1473
1474                 if (!priv->ucode_boot.v_addr)
1475                         goto err_pci_alloc;
1476         }
1477
1478         /* Copy images into buffers for card's bus-master reads ... */
1479
1480         /* Runtime instructions (first block of data in file) */
1481         len = inst_size;
1482         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1483         memcpy(priv->ucode_code.v_addr, src, len);
1484         src += len;
1485
1486         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1487                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1488
1489         /* Runtime data (2nd block)
1490          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1491         len = data_size;
1492         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1493         memcpy(priv->ucode_data.v_addr, src, len);
1494         memcpy(priv->ucode_data_backup.v_addr, src, len);
1495         src += len;
1496
1497         /* Initialization instructions (3rd block) */
1498         if (init_size) {
1499                 len = init_size;
1500                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1501                                 len);
1502                 memcpy(priv->ucode_init.v_addr, src, len);
1503                 src += len;
1504         }
1505
1506         /* Initialization data (4th block) */
1507         if (init_data_size) {
1508                 len = init_data_size;
1509                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1510                                len);
1511                 memcpy(priv->ucode_init_data.v_addr, src, len);
1512                 src += len;
1513         }
1514
1515         /* Bootstrap instructions (5th block) */
1516         len = boot_size;
1517         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1518         memcpy(priv->ucode_boot.v_addr, src, len);
1519
1520         /* We have our copies now, allow OS release its copies */
1521         release_firmware(ucode_raw);
1522         return 0;
1523
1524  err_pci_alloc:
1525         IWL_ERR(priv, "failed to allocate pci memory\n");
1526         ret = -ENOMEM;
1527         iwl_dealloc_ucode_pci(priv);
1528
1529  err_release:
1530         release_firmware(ucode_raw);
1531
1532  error:
1533         return ret;
1534 }
1535
1536 #ifdef CONFIG_IWLWIFI_DEBUG
1537 static const char *desc_lookup_text[] = {
1538         "OK",
1539         "FAIL",
1540         "BAD_PARAM",
1541         "BAD_CHECKSUM",
1542         "NMI_INTERRUPT_WDG",
1543         "SYSASSERT",
1544         "FATAL_ERROR",
1545         "BAD_COMMAND",
1546         "HW_ERROR_TUNE_LOCK",
1547         "HW_ERROR_TEMPERATURE",
1548         "ILLEGAL_CHAN_FREQ",
1549         "VCC_NOT_STABLE",
1550         "FH_ERROR",
1551         "NMI_INTERRUPT_HOST",
1552         "NMI_INTERRUPT_ACTION_PT",
1553         "NMI_INTERRUPT_UNKNOWN",
1554         "UCODE_VERSION_MISMATCH",
1555         "HW_ERROR_ABS_LOCK",
1556         "HW_ERROR_CAL_LOCK_FAIL",
1557         "NMI_INTERRUPT_INST_ACTION_PT",
1558         "NMI_INTERRUPT_DATA_ACTION_PT",
1559         "NMI_TRM_HW_ER",
1560         "NMI_INTERRUPT_TRM",
1561         "NMI_INTERRUPT_BREAK_POINT"
1562         "DEBUG_0",
1563         "DEBUG_1",
1564         "DEBUG_2",
1565         "DEBUG_3",
1566         "UNKNOWN"
1567 };
1568
1569 static const char *desc_lookup(int i)
1570 {
1571         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1572
1573         if (i < 0 || i > max)
1574                 i = max;
1575
1576         return desc_lookup_text[i];
1577 }
1578
1579 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1580 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1581
1582 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1583 {
1584         u32 data2, line;
1585         u32 desc, time, count, base, data1;
1586         u32 blink1, blink2, ilink1, ilink2;
1587
1588         if (priv->ucode_type == UCODE_INIT)
1589                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1590         else
1591                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1592
1593         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1594                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1595                 return;
1596         }
1597
1598         count = iwl_read_targ_mem(priv, base);
1599
1600         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1601                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1602                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1603                         priv->status, count);
1604         }
1605
1606         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1607         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1608         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1609         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1610         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1611         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1612         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1613         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1614         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1615
1616         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
1617                                       blink1, blink2, ilink1, ilink2);
1618
1619         IWL_ERR(priv, "Desc                               Time       "
1620                 "data1      data2      line\n");
1621         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1622                 desc_lookup(desc), desc, time, data1, data2, line);
1623         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1624         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1625                 ilink1, ilink2);
1626
1627 }
1628
1629 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1630
1631 /**
1632  * iwl_print_event_log - Dump error event log to syslog
1633  *
1634  */
1635 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1636                                 u32 num_events, u32 mode)
1637 {
1638         u32 i;
1639         u32 base;       /* SRAM byte address of event log header */
1640         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1641         u32 ptr;        /* SRAM byte address of log data */
1642         u32 ev, time, data; /* event log data */
1643
1644         if (num_events == 0)
1645                 return;
1646         if (priv->ucode_type == UCODE_INIT)
1647                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1648         else
1649                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1650
1651         if (mode == 0)
1652                 event_size = 2 * sizeof(u32);
1653         else
1654                 event_size = 3 * sizeof(u32);
1655
1656         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1657
1658         /* "time" is actually "data" for mode 0 (no timestamp).
1659         * place event id # at far right for easier visual parsing. */
1660         for (i = 0; i < num_events; i++) {
1661                 ev = iwl_read_targ_mem(priv, ptr);
1662                 ptr += sizeof(u32);
1663                 time = iwl_read_targ_mem(priv, ptr);
1664                 ptr += sizeof(u32);
1665                 if (mode == 0) {
1666                         /* data, ev */
1667                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1668                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1669                 } else {
1670                         data = iwl_read_targ_mem(priv, ptr);
1671                         ptr += sizeof(u32);
1672                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1673                                         time, data, ev);
1674                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1675                 }
1676         }
1677 }
1678
1679 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1680 {
1681         u32 base;       /* SRAM byte address of event log header */
1682         u32 capacity;   /* event log capacity in # entries */
1683         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1684         u32 num_wraps;  /* # times uCode wrapped to top of log */
1685         u32 next_entry; /* index of next entry to be written by uCode */
1686         u32 size;       /* # entries that we'll print */
1687
1688         if (priv->ucode_type == UCODE_INIT)
1689                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1690         else
1691                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1692
1693         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1694                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1695                 return;
1696         }
1697
1698         /* event log header */
1699         capacity = iwl_read_targ_mem(priv, base);
1700         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1701         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1702         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1703
1704         size = num_wraps ? capacity : next_entry;
1705
1706         /* bail out if nothing in log */
1707         if (size == 0) {
1708                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1709                 return;
1710         }
1711
1712         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1713                         size, num_wraps);
1714
1715         /* if uCode has wrapped back to top of log, start at the oldest entry,
1716          * i.e the next one that uCode would fill. */
1717         if (num_wraps)
1718                 iwl_print_event_log(priv, next_entry,
1719                                         capacity - next_entry, mode);
1720         /* (then/else) start at top of log */
1721         iwl_print_event_log(priv, 0, next_entry, mode);
1722
1723 }
1724 #endif
1725
1726 /**
1727  * iwl_alive_start - called after REPLY_ALIVE notification received
1728  *                   from protocol/runtime uCode (initialization uCode's
1729  *                   Alive gets handled by iwl_init_alive_start()).
1730  */
1731 static void iwl_alive_start(struct iwl_priv *priv)
1732 {
1733         int ret = 0;
1734
1735         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1736
1737         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1738                 /* We had an error bringing up the hardware, so take it
1739                  * all the way back down so we can try again */
1740                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1741                 goto restart;
1742         }
1743
1744         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1745          * This is a paranoid check, because we would not have gotten the
1746          * "runtime" alive if code weren't properly loaded.  */
1747         if (iwl_verify_ucode(priv)) {
1748                 /* Runtime instruction load was bad;
1749                  * take it all the way back down so we can try again */
1750                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1751                 goto restart;
1752         }
1753
1754         iwl_clear_stations_table(priv);
1755         ret = priv->cfg->ops->lib->alive_notify(priv);
1756         if (ret) {
1757                 IWL_WARN(priv,
1758                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1759                 goto restart;
1760         }
1761
1762         /* After the ALIVE response, we can send host commands to the uCode */
1763         set_bit(STATUS_ALIVE, &priv->status);
1764
1765         if (iwl_is_rfkill(priv))
1766                 return;
1767
1768         ieee80211_wake_queues(priv->hw);
1769
1770         priv->active_rate = priv->rates_mask;
1771         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1772
1773         /* Configure Tx antenna selection based on H/W config */
1774         if (priv->cfg->ops->hcmd->set_tx_ant)
1775                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
1776
1777         if (iwl_is_associated(priv)) {
1778                 struct iwl_rxon_cmd *active_rxon =
1779                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1780                 /* apply any changes in staging */
1781                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1782                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1783         } else {
1784                 /* Initialize our rx_config data */
1785                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1786
1787                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1788                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1789
1790                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1791         }
1792
1793         /* Configure Bluetooth device coexistence support */
1794         iwl_send_bt_config(priv);
1795
1796         iwl_reset_run_time_calib(priv);
1797
1798         /* Configure the adapter for unassociated operation */
1799         iwlcore_commit_rxon(priv);
1800
1801         /* At this point, the NIC is initialized and operational */
1802         iwl_rf_kill_ct_config(priv);
1803
1804         iwl_leds_register(priv);
1805
1806         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1807         set_bit(STATUS_READY, &priv->status);
1808         wake_up_interruptible(&priv->wait_command_queue);
1809
1810         iwl_power_update_mode(priv, true);
1811
1812         /* reassociate for ADHOC mode */
1813         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1814                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1815                                                                 priv->vif);
1816                 if (beacon)
1817                         iwl_mac_beacon_update(priv->hw, beacon);
1818         }
1819
1820
1821         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1822                 iwl_set_mode(priv, priv->iw_mode);
1823
1824         return;
1825
1826  restart:
1827         queue_work(priv->workqueue, &priv->restart);
1828 }
1829
1830 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1831
1832 static void __iwl_down(struct iwl_priv *priv)
1833 {
1834         unsigned long flags;
1835         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1836
1837         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1838
1839         if (!exit_pending)
1840                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1841
1842         iwl_leds_unregister(priv);
1843
1844         iwl_clear_stations_table(priv);
1845
1846         /* Unblock any waiting calls */
1847         wake_up_interruptible_all(&priv->wait_command_queue);
1848
1849         /* Wipe out the EXIT_PENDING status bit if we are not actually
1850          * exiting the module */
1851         if (!exit_pending)
1852                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1853
1854         /* stop and reset the on-board processor */
1855         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1856
1857         /* tell the device to stop sending interrupts */
1858         spin_lock_irqsave(&priv->lock, flags);
1859         iwl_disable_interrupts(priv);
1860         spin_unlock_irqrestore(&priv->lock, flags);
1861         iwl_synchronize_irq(priv);
1862
1863         if (priv->mac80211_registered)
1864                 ieee80211_stop_queues(priv->hw);
1865
1866         /* If we have not previously called iwl_init() then
1867          * clear all bits but the RF Kill bit and return */
1868         if (!iwl_is_init(priv)) {
1869                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1870                                         STATUS_RF_KILL_HW |
1871                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1872                                         STATUS_GEO_CONFIGURED |
1873                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1874                                         STATUS_EXIT_PENDING;
1875                 goto exit;
1876         }
1877
1878         /* ...otherwise clear out all the status bits but the RF Kill
1879          * bit and continue taking the NIC down. */
1880         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1881                                 STATUS_RF_KILL_HW |
1882                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1883                                 STATUS_GEO_CONFIGURED |
1884                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1885                                 STATUS_FW_ERROR |
1886                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1887                                 STATUS_EXIT_PENDING;
1888
1889         /* device going down, Stop using ICT table */
1890         iwl_disable_ict(priv);
1891         spin_lock_irqsave(&priv->lock, flags);
1892         iwl_clear_bit(priv, CSR_GP_CNTRL,
1893                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1894         spin_unlock_irqrestore(&priv->lock, flags);
1895
1896         iwl_txq_ctx_stop(priv);
1897         iwl_rxq_stop(priv);
1898
1899         iwl_write_prph(priv, APMG_CLK_DIS_REG,
1900                                 APMG_CLK_VAL_DMA_CLK_RQT);
1901
1902         udelay(5);
1903
1904         /* FIXME: apm_ops.suspend(priv) */
1905         if (exit_pending)
1906                 priv->cfg->ops->lib->apm_ops.stop(priv);
1907         else
1908                 priv->cfg->ops->lib->apm_ops.reset(priv);
1909  exit:
1910         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1911
1912         if (priv->ibss_beacon)
1913                 dev_kfree_skb(priv->ibss_beacon);
1914         priv->ibss_beacon = NULL;
1915
1916         /* clear out any free frames */
1917         iwl_clear_free_frames(priv);
1918 }
1919
1920 static void iwl_down(struct iwl_priv *priv)
1921 {
1922         mutex_lock(&priv->mutex);
1923         __iwl_down(priv);
1924         mutex_unlock(&priv->mutex);
1925
1926         iwl_cancel_deferred_work(priv);
1927 }
1928
1929 #define HW_READY_TIMEOUT (50)
1930
1931 static int iwl_set_hw_ready(struct iwl_priv *priv)
1932 {
1933         int ret = 0;
1934
1935         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1936                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
1937
1938         /* See if we got it */
1939         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1940                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1941                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
1942                                 HW_READY_TIMEOUT);
1943         if (ret != -ETIMEDOUT)
1944                 priv->hw_ready = true;
1945         else
1946                 priv->hw_ready = false;
1947
1948         IWL_DEBUG_INFO(priv, "hardware %s\n",
1949                       (priv->hw_ready == 1) ? "ready" : "not ready");
1950         return ret;
1951 }
1952
1953 static int iwl_prepare_card_hw(struct iwl_priv *priv)
1954 {
1955         int ret = 0;
1956
1957         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
1958
1959         ret = iwl_set_hw_ready(priv);
1960         if (priv->hw_ready)
1961                 return ret;
1962
1963         /* If HW is not ready, prepare the conditions to check again */
1964         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1965                         CSR_HW_IF_CONFIG_REG_PREPARE);
1966
1967         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
1968                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
1969                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
1970
1971         /* HW should be ready by now, check again. */
1972         if (ret != -ETIMEDOUT)
1973                 iwl_set_hw_ready(priv);
1974
1975         return ret;
1976 }
1977
1978 #define MAX_HW_RESTARTS 5
1979
1980 static int __iwl_up(struct iwl_priv *priv)
1981 {
1982         int i;
1983         int ret;
1984
1985         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1986                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1987                 return -EIO;
1988         }
1989
1990         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1991                 IWL_ERR(priv, "ucode not available for device bringup\n");
1992                 return -EIO;
1993         }
1994
1995         iwl_prepare_card_hw(priv);
1996
1997         if (!priv->hw_ready) {
1998                 IWL_WARN(priv, "Exit HW not ready\n");
1999                 return -EIO;
2000         }
2001
2002         /* If platform's RF_KILL switch is NOT set to KILL */
2003         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2004                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2005         else
2006                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2007
2008         if (iwl_is_rfkill(priv)) {
2009                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2010
2011                 iwl_enable_interrupts(priv);
2012                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2013                 return 0;
2014         }
2015
2016         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2017
2018         ret = iwl_hw_nic_init(priv);
2019         if (ret) {
2020                 IWL_ERR(priv, "Unable to init nic\n");
2021                 return ret;
2022         }
2023
2024         /* make sure rfkill handshake bits are cleared */
2025         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2026         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2027                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2028
2029         /* clear (again), then enable host interrupts */
2030         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2031         iwl_enable_interrupts(priv);
2032
2033         /* really make sure rfkill handshake bits are cleared */
2034         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2035         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2036
2037         /* Copy original ucode data image from disk into backup cache.
2038          * This will be used to initialize the on-board processor's
2039          * data SRAM for a clean start when the runtime program first loads. */
2040         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2041                priv->ucode_data.len);
2042
2043         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2044
2045                 iwl_clear_stations_table(priv);
2046
2047                 /* load bootstrap state machine,
2048                  * load bootstrap program into processor's memory,
2049                  * prepare to load the "initialize" uCode */
2050                 ret = priv->cfg->ops->lib->load_ucode(priv);
2051
2052                 if (ret) {
2053                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
2054                                 ret);
2055                         continue;
2056                 }
2057
2058                 /* start card; "initialize" will load runtime ucode */
2059                 iwl_nic_start(priv);
2060
2061                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2062
2063                 return 0;
2064         }
2065
2066         set_bit(STATUS_EXIT_PENDING, &priv->status);
2067         __iwl_down(priv);
2068         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2069
2070         /* tried to restart and config the device for as long as our
2071          * patience could withstand */
2072         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2073         return -EIO;
2074 }
2075
2076
2077 /*****************************************************************************
2078  *
2079  * Workqueue callbacks
2080  *
2081  *****************************************************************************/
2082
2083 static void iwl_bg_init_alive_start(struct work_struct *data)
2084 {
2085         struct iwl_priv *priv =
2086             container_of(data, struct iwl_priv, init_alive_start.work);
2087
2088         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2089                 return;
2090
2091         mutex_lock(&priv->mutex);
2092         priv->cfg->ops->lib->init_alive_start(priv);
2093         mutex_unlock(&priv->mutex);
2094 }
2095
2096 static void iwl_bg_alive_start(struct work_struct *data)
2097 {
2098         struct iwl_priv *priv =
2099             container_of(data, struct iwl_priv, alive_start.work);
2100
2101         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2102                 return;
2103
2104         /* enable dram interrupt */
2105         iwl_reset_ict(priv);
2106
2107         mutex_lock(&priv->mutex);
2108         iwl_alive_start(priv);
2109         mutex_unlock(&priv->mutex);
2110 }
2111
2112 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2113 {
2114         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2115                         run_time_calib_work);
2116
2117         mutex_lock(&priv->mutex);
2118
2119         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2120             test_bit(STATUS_SCANNING, &priv->status)) {
2121                 mutex_unlock(&priv->mutex);
2122                 return;
2123         }
2124
2125         if (priv->start_calib) {
2126                 iwl_chain_noise_calibration(priv, &priv->statistics);
2127
2128                 iwl_sensitivity_calibration(priv, &priv->statistics);
2129         }
2130
2131         mutex_unlock(&priv->mutex);
2132         return;
2133 }
2134
2135 static void iwl_bg_up(struct work_struct *data)
2136 {
2137         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2138
2139         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2140                 return;
2141
2142         mutex_lock(&priv->mutex);
2143         __iwl_up(priv);
2144         mutex_unlock(&priv->mutex);
2145 }
2146
2147 static void iwl_bg_restart(struct work_struct *data)
2148 {
2149         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2150
2151         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2152                 return;
2153
2154         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2155                 mutex_lock(&priv->mutex);
2156                 priv->vif = NULL;
2157                 priv->is_open = 0;
2158                 mutex_unlock(&priv->mutex);
2159                 iwl_down(priv);
2160                 ieee80211_restart_hw(priv->hw);
2161         } else {
2162                 iwl_down(priv);
2163                 queue_work(priv->workqueue, &priv->up);
2164         }
2165 }
2166
2167 static void iwl_bg_rx_replenish(struct work_struct *data)
2168 {
2169         struct iwl_priv *priv =
2170             container_of(data, struct iwl_priv, rx_replenish);
2171
2172         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2173                 return;
2174
2175         mutex_lock(&priv->mutex);
2176         iwl_rx_replenish(priv);
2177         mutex_unlock(&priv->mutex);
2178 }
2179
2180 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2181
2182 void iwl_post_associate(struct iwl_priv *priv)
2183 {
2184         struct ieee80211_conf *conf = NULL;
2185         int ret = 0;
2186         unsigned long flags;
2187
2188         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2189                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2190                 return;
2191         }
2192
2193         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2194                         priv->assoc_id, priv->active_rxon.bssid_addr);
2195
2196
2197         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2198                 return;
2199
2200
2201         if (!priv->vif || !priv->is_open)
2202                 return;
2203
2204         iwl_scan_cancel_timeout(priv, 200);
2205
2206         conf = ieee80211_get_hw_conf(priv->hw);
2207
2208         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2209         iwlcore_commit_rxon(priv);
2210
2211         iwl_setup_rxon_timing(priv);
2212         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2213                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2214         if (ret)
2215                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2216                             "Attempting to continue.\n");
2217
2218         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2219
2220         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2221
2222         if (priv->cfg->ops->hcmd->set_rxon_chain)
2223                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2224
2225         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2226
2227         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2228                         priv->assoc_id, priv->beacon_int);
2229
2230         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2231                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2232         else
2233                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2234
2235         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2236                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2237                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2238                 else
2239                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2240
2241                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2242                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2243
2244         }
2245
2246         iwlcore_commit_rxon(priv);
2247
2248         switch (priv->iw_mode) {
2249         case NL80211_IFTYPE_STATION:
2250                 break;
2251
2252         case NL80211_IFTYPE_ADHOC:
2253
2254                 /* assume default assoc id */
2255                 priv->assoc_id = 1;
2256
2257                 iwl_rxon_add_station(priv, priv->bssid, 0);
2258                 iwl_send_beacon_cmd(priv);
2259
2260                 break;
2261
2262         default:
2263                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2264                           __func__, priv->iw_mode);
2265                 break;
2266         }
2267
2268         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2269                 priv->assoc_station_added = 1;
2270
2271         spin_lock_irqsave(&priv->lock, flags);
2272         iwl_activate_qos(priv, 0);
2273         spin_unlock_irqrestore(&priv->lock, flags);
2274
2275         /* the chain noise calibration will enabled PM upon completion
2276          * If chain noise has already been run, then we need to enable
2277          * power management here */
2278         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2279                 iwl_power_update_mode(priv, false);
2280
2281         /* Enable Rx differential gain and sensitivity calibrations */
2282         iwl_chain_noise_reset(priv);
2283         priv->start_calib = 1;
2284
2285 }
2286
2287 /*****************************************************************************
2288  *
2289  * mac80211 entry point functions
2290  *
2291  *****************************************************************************/
2292
2293 #define UCODE_READY_TIMEOUT     (4 * HZ)
2294
2295 static int iwl_mac_start(struct ieee80211_hw *hw)
2296 {
2297         struct iwl_priv *priv = hw->priv;
2298         int ret;
2299
2300         IWL_DEBUG_MAC80211(priv, "enter\n");
2301
2302         /* we should be verifying the device is ready to be opened */
2303         mutex_lock(&priv->mutex);
2304
2305         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2306          * ucode filename and max sizes are card-specific. */
2307
2308         if (!priv->ucode_code.len) {
2309                 ret = iwl_read_ucode(priv);
2310                 if (ret) {
2311                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2312                         mutex_unlock(&priv->mutex);
2313                         return ret;
2314                 }
2315         }
2316
2317         ret = __iwl_up(priv);
2318
2319         mutex_unlock(&priv->mutex);
2320
2321         if (ret)
2322                 return ret;
2323
2324         if (iwl_is_rfkill(priv))
2325                 goto out;
2326
2327         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2328
2329         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2330          * mac80211 will not be run successfully. */
2331         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2332                         test_bit(STATUS_READY, &priv->status),
2333                         UCODE_READY_TIMEOUT);
2334         if (!ret) {
2335                 if (!test_bit(STATUS_READY, &priv->status)) {
2336                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2337                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2338                         return -ETIMEDOUT;
2339                 }
2340         }
2341
2342 out:
2343         priv->is_open = 1;
2344         IWL_DEBUG_MAC80211(priv, "leave\n");
2345         return 0;
2346 }
2347
2348 static void iwl_mac_stop(struct ieee80211_hw *hw)
2349 {
2350         struct iwl_priv *priv = hw->priv;
2351
2352         IWL_DEBUG_MAC80211(priv, "enter\n");
2353
2354         if (!priv->is_open)
2355                 return;
2356
2357         priv->is_open = 0;
2358
2359         if (iwl_is_ready_rf(priv) || test_bit(STATUS_SCAN_HW, &priv->status)) {
2360                 /* stop mac, cancel any scan request and clear
2361                  * RXON_FILTER_ASSOC_MSK BIT
2362                  */
2363                 mutex_lock(&priv->mutex);
2364                 iwl_scan_cancel_timeout(priv, 100);
2365                 mutex_unlock(&priv->mutex);
2366         }
2367
2368         iwl_down(priv);
2369
2370         flush_workqueue(priv->workqueue);
2371
2372         /* enable interrupts again in order to receive rfkill changes */
2373         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2374         iwl_enable_interrupts(priv);
2375
2376         IWL_DEBUG_MAC80211(priv, "leave\n");
2377 }
2378
2379 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2380 {
2381         struct iwl_priv *priv = hw->priv;
2382
2383         IWL_DEBUG_MACDUMP(priv, "enter\n");
2384
2385         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2386                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2387
2388         if (iwl_tx_skb(priv, skb))
2389                 dev_kfree_skb_any(skb);
2390
2391         IWL_DEBUG_MACDUMP(priv, "leave\n");
2392         return NETDEV_TX_OK;
2393 }
2394
2395 void iwl_config_ap(struct iwl_priv *priv)
2396 {
2397         int ret = 0;
2398         unsigned long flags;
2399
2400         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2401                 return;
2402
2403         /* The following should be done only at AP bring up */
2404         if (!iwl_is_associated(priv)) {
2405
2406                 /* RXON - unassoc (to set timing command) */
2407                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2408                 iwlcore_commit_rxon(priv);
2409
2410                 /* RXON Timing */
2411                 iwl_setup_rxon_timing(priv);
2412                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2413                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2414                 if (ret)
2415                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2416                                         "Attempting to continue.\n");
2417
2418                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2419                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2420
2421                 /* FIXME: what should be the assoc_id for AP? */
2422                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2423                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2424                         priv->staging_rxon.flags |=
2425                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2426                 else
2427                         priv->staging_rxon.flags &=
2428                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2429
2430                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2431                         if (priv->assoc_capability &
2432                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2433                                 priv->staging_rxon.flags |=
2434                                         RXON_FLG_SHORT_SLOT_MSK;
2435                         else
2436                                 priv->staging_rxon.flags &=
2437                                         ~RXON_FLG_SHORT_SLOT_MSK;
2438
2439                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2440                                 priv->staging_rxon.flags &=
2441                                         ~RXON_FLG_SHORT_SLOT_MSK;
2442                 }
2443                 /* restore RXON assoc */
2444                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2445                 iwlcore_commit_rxon(priv);
2446                 spin_lock_irqsave(&priv->lock, flags);
2447                 iwl_activate_qos(priv, 1);
2448                 spin_unlock_irqrestore(&priv->lock, flags);
2449                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2450         }
2451         iwl_send_beacon_cmd(priv);
2452
2453         /* FIXME - we need to add code here to detect a totally new
2454          * configuration, reset the AP, unassoc, rxon timing, assoc,
2455          * clear sta table, add BCAST sta... */
2456 }
2457
2458 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2459                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2460                         u32 iv32, u16 *phase1key)
2461 {
2462
2463         struct iwl_priv *priv = hw->priv;
2464         IWL_DEBUG_MAC80211(priv, "enter\n");
2465
2466         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2467
2468         IWL_DEBUG_MAC80211(priv, "leave\n");
2469 }
2470
2471 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2472                            struct ieee80211_vif *vif,
2473                            struct ieee80211_sta *sta,
2474                            struct ieee80211_key_conf *key)
2475 {
2476         struct iwl_priv *priv = hw->priv;
2477         const u8 *addr;
2478         int ret;
2479         u8 sta_id;
2480         bool is_default_wep_key = false;
2481
2482         IWL_DEBUG_MAC80211(priv, "enter\n");
2483
2484         if (priv->cfg->mod_params->sw_crypto) {
2485                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2486                 return -EOPNOTSUPP;
2487         }
2488         addr = sta ? sta->addr : iwl_bcast_addr;
2489         sta_id = iwl_find_station(priv, addr);
2490         if (sta_id == IWL_INVALID_STATION) {
2491                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2492                                    addr);
2493                 return -EINVAL;
2494
2495         }
2496
2497         mutex_lock(&priv->mutex);
2498         iwl_scan_cancel_timeout(priv, 100);
2499         mutex_unlock(&priv->mutex);
2500
2501         /* If we are getting WEP group key and we didn't receive any key mapping
2502          * so far, we are in legacy wep mode (group key only), otherwise we are
2503          * in 1X mode.
2504          * In legacy wep mode, we use another host command to the uCode */
2505         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2506                 priv->iw_mode != NL80211_IFTYPE_AP) {
2507                 if (cmd == SET_KEY)
2508                         is_default_wep_key = !priv->key_mapping_key;
2509                 else
2510                         is_default_wep_key =
2511                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2512         }
2513
2514         switch (cmd) {
2515         case SET_KEY:
2516                 if (is_default_wep_key)
2517                         ret = iwl_set_default_wep_key(priv, key);
2518                 else
2519                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2520
2521                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2522                 break;
2523         case DISABLE_KEY:
2524                 if (is_default_wep_key)
2525                         ret = iwl_remove_default_wep_key(priv, key);
2526                 else
2527                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2528
2529                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2530                 break;
2531         default:
2532                 ret = -EINVAL;
2533         }
2534
2535         IWL_DEBUG_MAC80211(priv, "leave\n");
2536
2537         return ret;
2538 }
2539
2540 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2541                              enum ieee80211_ampdu_mlme_action action,
2542                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2543 {
2544         struct iwl_priv *priv = hw->priv;
2545         int ret;
2546
2547         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2548                      sta->addr, tid);
2549
2550         if (!(priv->cfg->sku & IWL_SKU_N))
2551                 return -EACCES;
2552
2553         switch (action) {
2554         case IEEE80211_AMPDU_RX_START:
2555                 IWL_DEBUG_HT(priv, "start Rx\n");
2556                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2557         case IEEE80211_AMPDU_RX_STOP:
2558                 IWL_DEBUG_HT(priv, "stop Rx\n");
2559                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2560                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2561                         return 0;
2562                 else
2563                         return ret;
2564         case IEEE80211_AMPDU_TX_START:
2565                 IWL_DEBUG_HT(priv, "start Tx\n");
2566                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2567         case IEEE80211_AMPDU_TX_STOP:
2568                 IWL_DEBUG_HT(priv, "stop Tx\n");
2569                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2570                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2571                         return 0;
2572                 else
2573                         return ret;
2574         default:
2575                 IWL_DEBUG_HT(priv, "unknown\n");
2576                 return -EINVAL;
2577                 break;
2578         }
2579         return 0;
2580 }
2581
2582 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2583                              struct ieee80211_low_level_stats *stats)
2584 {
2585         struct iwl_priv *priv = hw->priv;
2586
2587         priv = hw->priv;
2588         IWL_DEBUG_MAC80211(priv, "enter\n");
2589         IWL_DEBUG_MAC80211(priv, "leave\n");
2590
2591         return 0;
2592 }
2593
2594 /*****************************************************************************
2595  *
2596  * sysfs attributes
2597  *
2598  *****************************************************************************/
2599
2600 #ifdef CONFIG_IWLWIFI_DEBUG
2601
2602 /*
2603  * The following adds a new attribute to the sysfs representation
2604  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2605  * used for controlling the debug level.
2606  *
2607  * See the level definitions in iwl for details.
2608  *
2609  * The debug_level being managed using sysfs below is a per device debug
2610  * level that is used instead of the global debug level if it (the per
2611  * device debug level) is set.
2612  */
2613 static ssize_t show_debug_level(struct device *d,
2614                                 struct device_attribute *attr, char *buf)
2615 {
2616         struct iwl_priv *priv = dev_get_drvdata(d);
2617         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
2618 }
2619 static ssize_t store_debug_level(struct device *d,
2620                                 struct device_attribute *attr,
2621                                  const char *buf, size_t count)
2622 {
2623         struct iwl_priv *priv = dev_get_drvdata(d);
2624         unsigned long val;
2625         int ret;
2626
2627         ret = strict_strtoul(buf, 0, &val);
2628         if (ret)
2629                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2630         else {
2631                 priv->debug_level = val;
2632                 if (iwl_alloc_traffic_mem(priv))
2633                         IWL_ERR(priv,
2634                                 "Not enough memory to generate traffic log\n");
2635         }
2636         return strnlen(buf, count);
2637 }
2638
2639 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2640                         show_debug_level, store_debug_level);
2641
2642
2643 #endif /* CONFIG_IWLWIFI_DEBUG */
2644
2645
2646 static ssize_t show_temperature(struct device *d,
2647                                 struct device_attribute *attr, char *buf)
2648 {
2649         struct iwl_priv *priv = dev_get_drvdata(d);
2650
2651         if (!iwl_is_alive(priv))
2652                 return -EAGAIN;
2653
2654         return sprintf(buf, "%d\n", priv->temperature);
2655 }
2656
2657 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2658
2659 static ssize_t show_tx_power(struct device *d,
2660                              struct device_attribute *attr, char *buf)
2661 {
2662         struct iwl_priv *priv = dev_get_drvdata(d);
2663
2664         if (!iwl_is_ready_rf(priv))
2665                 return sprintf(buf, "off\n");
2666         else
2667                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2668 }
2669
2670 static ssize_t store_tx_power(struct device *d,
2671                               struct device_attribute *attr,
2672                               const char *buf, size_t count)
2673 {
2674         struct iwl_priv *priv = dev_get_drvdata(d);
2675         unsigned long val;
2676         int ret;
2677
2678         ret = strict_strtoul(buf, 10, &val);
2679         if (ret)
2680                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2681         else {
2682                 ret = iwl_set_tx_power(priv, val, false);
2683                 if (ret)
2684                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
2685                                 ret);
2686                 else
2687                         ret = count;
2688         }
2689         return ret;
2690 }
2691
2692 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2693
2694 static ssize_t show_flags(struct device *d,
2695                           struct device_attribute *attr, char *buf)
2696 {
2697         struct iwl_priv *priv = dev_get_drvdata(d);
2698
2699         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2700 }
2701
2702 static ssize_t store_flags(struct device *d,
2703                            struct device_attribute *attr,
2704                            const char *buf, size_t count)
2705 {
2706         struct iwl_priv *priv = dev_get_drvdata(d);
2707         unsigned long val;
2708         u32 flags;
2709         int ret = strict_strtoul(buf, 0, &val);
2710         if (ret)
2711                 return ret;
2712         flags = (u32)val;
2713
2714         mutex_lock(&priv->mutex);
2715         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2716                 /* Cancel any currently running scans... */
2717                 if (iwl_scan_cancel_timeout(priv, 100))
2718                         IWL_WARN(priv, "Could not cancel scan.\n");
2719                 else {
2720                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2721                         priv->staging_rxon.flags = cpu_to_le32(flags);
2722                         iwlcore_commit_rxon(priv);
2723                 }
2724         }
2725         mutex_unlock(&priv->mutex);
2726
2727         return count;
2728 }
2729
2730 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2731
2732 static ssize_t show_filter_flags(struct device *d,
2733                                  struct device_attribute *attr, char *buf)
2734 {
2735         struct iwl_priv *priv = dev_get_drvdata(d);
2736
2737         return sprintf(buf, "0x%04X\n",
2738                 le32_to_cpu(priv->active_rxon.filter_flags));
2739 }
2740
2741 static ssize_t store_filter_flags(struct device *d,
2742                                   struct device_attribute *attr,
2743                                   const char *buf, size_t count)
2744 {
2745         struct iwl_priv *priv = dev_get_drvdata(d);
2746         unsigned long val;
2747         u32 filter_flags;
2748         int ret = strict_strtoul(buf, 0, &val);
2749         if (ret)
2750                 return ret;
2751         filter_flags = (u32)val;
2752
2753         mutex_lock(&priv->mutex);
2754         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2755                 /* Cancel any currently running scans... */
2756                 if (iwl_scan_cancel_timeout(priv, 100))
2757                         IWL_WARN(priv, "Could not cancel scan.\n");
2758                 else {
2759                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2760                                        "0x%04X\n", filter_flags);
2761                         priv->staging_rxon.filter_flags =
2762                                 cpu_to_le32(filter_flags);
2763                         iwlcore_commit_rxon(priv);
2764                 }
2765         }
2766         mutex_unlock(&priv->mutex);
2767
2768         return count;
2769 }
2770
2771 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2772                    store_filter_flags);
2773
2774
2775 static ssize_t show_statistics(struct device *d,
2776                                struct device_attribute *attr, char *buf)
2777 {
2778         struct iwl_priv *priv = dev_get_drvdata(d);
2779         u32 size = sizeof(struct iwl_notif_statistics);
2780         u32 len = 0, ofs = 0;
2781         u8 *data = (u8 *)&priv->statistics;
2782         int rc = 0;
2783
2784         if (!iwl_is_alive(priv))
2785                 return -EAGAIN;
2786
2787         mutex_lock(&priv->mutex);
2788         rc = iwl_send_statistics_request(priv, 0);
2789         mutex_unlock(&priv->mutex);
2790
2791         if (rc) {
2792                 len = sprintf(buf,
2793                               "Error sending statistics request: 0x%08X\n", rc);
2794                 return len;
2795         }
2796
2797         while (size && (PAGE_SIZE - len)) {
2798                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2799                                    PAGE_SIZE - len, 1);
2800                 len = strlen(buf);
2801                 if (PAGE_SIZE - len)
2802                         buf[len++] = '\n';
2803
2804                 ofs += 16;
2805                 size -= min(size, 16U);
2806         }
2807
2808         return len;
2809 }
2810
2811 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
2812
2813 static ssize_t show_rts_ht_protection(struct device *d,
2814                              struct device_attribute *attr, char *buf)
2815 {
2816         struct iwl_priv *priv = dev_get_drvdata(d);
2817
2818         return sprintf(buf, "%s\n",
2819                 priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
2820 }
2821
2822 static ssize_t store_rts_ht_protection(struct device *d,
2823                               struct device_attribute *attr,
2824                               const char *buf, size_t count)
2825 {
2826         struct iwl_priv *priv = dev_get_drvdata(d);
2827         unsigned long val;
2828         int ret;
2829
2830         ret = strict_strtoul(buf, 10, &val);
2831         if (ret)
2832                 IWL_INFO(priv, "Input is not in decimal form.\n");
2833         else {
2834                 if (!iwl_is_associated(priv))
2835                         priv->cfg->use_rts_for_ht = val ? true : false;
2836                 else
2837                         IWL_ERR(priv, "Sta associated with AP - "
2838                                 "Change protection mechanism is not allowed\n");
2839                 ret = count;
2840         }
2841         return ret;
2842 }
2843
2844 static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
2845                         show_rts_ht_protection, store_rts_ht_protection);
2846
2847
2848 /*****************************************************************************
2849  *
2850  * driver setup and teardown
2851  *
2852  *****************************************************************************/
2853
2854 static void iwl_setup_deferred_work(struct iwl_priv *priv)
2855 {
2856         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
2857
2858         init_waitqueue_head(&priv->wait_command_queue);
2859
2860         INIT_WORK(&priv->up, iwl_bg_up);
2861         INIT_WORK(&priv->restart, iwl_bg_restart);
2862         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
2863         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
2864         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
2865         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
2866         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
2867
2868         iwl_setup_scan_deferred_work(priv);
2869
2870         if (priv->cfg->ops->lib->setup_deferred_work)
2871                 priv->cfg->ops->lib->setup_deferred_work(priv);
2872
2873         init_timer(&priv->statistics_periodic);
2874         priv->statistics_periodic.data = (unsigned long)priv;
2875         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
2876
2877         if (!priv->cfg->use_isr_legacy)
2878                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2879                         iwl_irq_tasklet, (unsigned long)priv);
2880         else
2881                 tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2882                         iwl_irq_tasklet_legacy, (unsigned long)priv);
2883 }
2884
2885 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
2886 {
2887         if (priv->cfg->ops->lib->cancel_deferred_work)
2888                 priv->cfg->ops->lib->cancel_deferred_work(priv);
2889
2890         cancel_delayed_work_sync(&priv->init_alive_start);
2891         cancel_delayed_work(&priv->scan_check);
2892         cancel_delayed_work(&priv->alive_start);
2893         cancel_work_sync(&priv->beacon_update);
2894         del_timer_sync(&priv->statistics_periodic);
2895 }
2896
2897 static struct attribute *iwl_sysfs_entries[] = {
2898         &dev_attr_flags.attr,
2899         &dev_attr_filter_flags.attr,
2900         &dev_attr_statistics.attr,
2901         &dev_attr_temperature.attr,
2902         &dev_attr_tx_power.attr,
2903         &dev_attr_rts_ht_protection.attr,
2904 #ifdef CONFIG_IWLWIFI_DEBUG
2905         &dev_attr_debug_level.attr,
2906 #endif
2907         NULL
2908 };
2909
2910 static struct attribute_group iwl_attribute_group = {
2911         .name = NULL,           /* put in device directory */
2912         .attrs = iwl_sysfs_entries,
2913 };
2914
2915 static struct ieee80211_ops iwl_hw_ops = {
2916         .tx = iwl_mac_tx,
2917         .start = iwl_mac_start,
2918         .stop = iwl_mac_stop,
2919         .add_interface = iwl_mac_add_interface,
2920         .remove_interface = iwl_mac_remove_interface,
2921         .config = iwl_mac_config,
2922         .configure_filter = iwl_configure_filter,
2923         .set_key = iwl_mac_set_key,
2924         .update_tkip_key = iwl_mac_update_tkip_key,
2925         .get_stats = iwl_mac_get_stats,
2926         .get_tx_stats = iwl_mac_get_tx_stats,
2927         .conf_tx = iwl_mac_conf_tx,
2928         .reset_tsf = iwl_mac_reset_tsf,
2929         .bss_info_changed = iwl_bss_info_changed,
2930         .ampdu_action = iwl_mac_ampdu_action,
2931         .hw_scan = iwl_mac_hw_scan
2932 };
2933
2934 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2935 {
2936         int err = 0;
2937         struct iwl_priv *priv;
2938         struct ieee80211_hw *hw;
2939         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
2940         unsigned long flags;
2941         u16 pci_cmd;
2942
2943         /************************
2944          * 1. Allocating HW data
2945          ************************/
2946
2947         /* Disabling hardware scan means that mac80211 will perform scans
2948          * "the hard way", rather than using device's scan. */
2949         if (cfg->mod_params->disable_hw_scan) {
2950                 if (iwl_debug_level & IWL_DL_INFO)
2951                         dev_printk(KERN_DEBUG, &(pdev->dev),
2952                                    "Disabling hw_scan\n");
2953                 iwl_hw_ops.hw_scan = NULL;
2954         }
2955
2956         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
2957         if (!hw) {
2958                 err = -ENOMEM;
2959                 goto out;
2960         }
2961         priv = hw->priv;
2962         /* At this point both hw and priv are allocated. */
2963
2964         SET_IEEE80211_DEV(hw, &pdev->dev);
2965
2966         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
2967         priv->cfg = cfg;
2968         priv->pci_dev = pdev;
2969         priv->inta_mask = CSR_INI_SET_MASK;
2970
2971 #ifdef CONFIG_IWLWIFI_DEBUG
2972         atomic_set(&priv->restrict_refcnt, 0);
2973 #endif
2974         if (iwl_alloc_traffic_mem(priv))
2975                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
2976
2977         /**************************
2978          * 2. Initializing PCI bus
2979          **************************/
2980         if (pci_enable_device(pdev)) {
2981                 err = -ENODEV;
2982                 goto out_ieee80211_free_hw;
2983         }
2984
2985         pci_set_master(pdev);
2986
2987         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2988         if (!err)
2989                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2990         if (err) {
2991                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2992                 if (!err)
2993                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2994                 /* both attempts failed: */
2995                 if (err) {
2996                         IWL_WARN(priv, "No suitable DMA available.\n");
2997                         goto out_pci_disable_device;
2998                 }
2999         }
3000
3001         err = pci_request_regions(pdev, DRV_NAME);
3002         if (err)
3003                 goto out_pci_disable_device;
3004
3005         pci_set_drvdata(pdev, priv);
3006
3007
3008         /***********************
3009          * 3. Read REV register
3010          ***********************/
3011         priv->hw_base = pci_iomap(pdev, 0, 0);
3012         if (!priv->hw_base) {
3013                 err = -ENODEV;
3014                 goto out_pci_release_regions;
3015         }
3016
3017         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3018                 (unsigned long long) pci_resource_len(pdev, 0));
3019         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3020
3021         /* this spin lock will be used in apm_ops.init and EEPROM access
3022          * we should init now
3023          */
3024         spin_lock_init(&priv->reg_lock);
3025         iwl_hw_detect(priv);
3026         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3027                 priv->cfg->name, priv->hw_rev);
3028
3029         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3030          * PCI Tx retries from interfering with C3 CPU state */
3031         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3032
3033         iwl_prepare_card_hw(priv);
3034         if (!priv->hw_ready) {
3035                 IWL_WARN(priv, "Failed, HW not ready\n");
3036                 goto out_iounmap;
3037         }
3038
3039         /* amp init */
3040         err = priv->cfg->ops->lib->apm_ops.init(priv);
3041         if (err < 0) {
3042                 IWL_ERR(priv, "Failed to init APMG\n");
3043                 goto out_iounmap;
3044         }
3045         /*****************
3046          * 4. Read EEPROM
3047          *****************/
3048         /* Read the EEPROM */
3049         err = iwl_eeprom_init(priv);
3050         if (err) {
3051                 IWL_ERR(priv, "Unable to init EEPROM\n");
3052                 goto out_iounmap;
3053         }
3054         err = iwl_eeprom_check_version(priv);
3055         if (err)
3056                 goto out_free_eeprom;
3057
3058         /* extract MAC Address */
3059         iwl_eeprom_get_mac(priv, priv->mac_addr);
3060         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3061         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3062
3063         /************************
3064          * 5. Setup HW constants
3065          ************************/
3066         if (iwl_set_hw_params(priv)) {
3067                 IWL_ERR(priv, "failed to set hw parameters\n");
3068                 goto out_free_eeprom;
3069         }
3070
3071         /*******************
3072          * 6. Setup priv
3073          *******************/
3074
3075         err = iwl_init_drv(priv);
3076         if (err)
3077                 goto out_free_eeprom;
3078         /* At this point both hw and priv are initialized. */
3079
3080         /********************
3081          * 7. Setup services
3082          ********************/
3083         spin_lock_irqsave(&priv->lock, flags);
3084         iwl_disable_interrupts(priv);
3085         spin_unlock_irqrestore(&priv->lock, flags);
3086
3087         pci_enable_msi(priv->pci_dev);
3088
3089         iwl_alloc_isr_ict(priv);
3090         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
3091                           IRQF_SHARED, DRV_NAME, priv);
3092         if (err) {
3093                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3094                 goto out_disable_msi;
3095         }
3096         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3097         if (err) {
3098                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3099                 goto out_free_irq;
3100         }
3101
3102         iwl_setup_deferred_work(priv);
3103         iwl_setup_rx_handlers(priv);
3104
3105         /**********************************
3106          * 8. Setup and register mac80211
3107          **********************************/
3108
3109         /* enable interrupts if needed: hw bug w/a */
3110         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3111         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3112                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3113                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3114         }
3115
3116         iwl_enable_interrupts(priv);
3117
3118         err = iwl_setup_mac(priv);
3119         if (err)
3120                 goto out_remove_sysfs;
3121
3122         err = iwl_dbgfs_register(priv, DRV_NAME);
3123         if (err)
3124                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
3125
3126         /* If platform's RF_KILL switch is NOT set to KILL */
3127         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3128                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3129         else
3130                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3131
3132         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3133                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3134
3135         iwl_power_initialize(priv);
3136         iwl_tt_initialize(priv);
3137         return 0;
3138
3139  out_remove_sysfs:
3140         destroy_workqueue(priv->workqueue);
3141         priv->workqueue = NULL;
3142         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3143  out_free_irq:
3144         free_irq(priv->pci_dev->irq, priv);
3145         iwl_free_isr_ict(priv);
3146  out_disable_msi:
3147         pci_disable_msi(priv->pci_dev);
3148         iwl_uninit_drv(priv);
3149  out_free_eeprom:
3150         iwl_eeprom_free(priv);
3151  out_iounmap:
3152         pci_iounmap(pdev, priv->hw_base);
3153  out_pci_release_regions:
3154         pci_set_drvdata(pdev, NULL);
3155         pci_release_regions(pdev);
3156  out_pci_disable_device:
3157         pci_disable_device(pdev);
3158  out_ieee80211_free_hw:
3159         ieee80211_free_hw(priv->hw);
3160         iwl_free_traffic_mem(priv);
3161  out:
3162         return err;
3163 }
3164
3165 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3166 {
3167         struct iwl_priv *priv = pci_get_drvdata(pdev);
3168         unsigned long flags;
3169
3170         if (!priv)
3171                 return;
3172
3173         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3174
3175         iwl_dbgfs_unregister(priv);
3176         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3177
3178         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3179          * to be called and iwl_down since we are removing the device
3180          * we need to set STATUS_EXIT_PENDING bit.
3181          */
3182         set_bit(STATUS_EXIT_PENDING, &priv->status);
3183         if (priv->mac80211_registered) {
3184                 ieee80211_unregister_hw(priv->hw);
3185                 priv->mac80211_registered = 0;
3186         } else {
3187                 iwl_down(priv);
3188         }
3189
3190         iwl_tt_exit(priv);
3191
3192         /* make sure we flush any pending irq or
3193          * tasklet for the driver
3194          */
3195         spin_lock_irqsave(&priv->lock, flags);
3196         iwl_disable_interrupts(priv);
3197         spin_unlock_irqrestore(&priv->lock, flags);
3198
3199         iwl_synchronize_irq(priv);
3200
3201         iwl_dealloc_ucode_pci(priv);
3202
3203         if (priv->rxq.bd)
3204                 iwl_rx_queue_free(priv, &priv->rxq);
3205         iwl_hw_txq_ctx_free(priv);
3206
3207         iwl_clear_stations_table(priv);
3208         iwl_eeprom_free(priv);
3209
3210
3211         /*netif_stop_queue(dev); */
3212         flush_workqueue(priv->workqueue);
3213
3214         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3215          * priv->workqueue... so we can't take down the workqueue
3216          * until now... */
3217         destroy_workqueue(priv->workqueue);
3218         priv->workqueue = NULL;
3219         iwl_free_traffic_mem(priv);
3220
3221         free_irq(priv->pci_dev->irq, priv);
3222         pci_disable_msi(priv->pci_dev);
3223         pci_iounmap(pdev, priv->hw_base);
3224         pci_release_regions(pdev);
3225         pci_disable_device(pdev);
3226         pci_set_drvdata(pdev, NULL);
3227
3228         iwl_uninit_drv(priv);
3229
3230         iwl_free_isr_ict(priv);
3231
3232         if (priv->ibss_beacon)
3233                 dev_kfree_skb(priv->ibss_beacon);
3234
3235         ieee80211_free_hw(priv->hw);
3236 }
3237
3238
3239 /*****************************************************************************
3240  *
3241  * driver and module entry point
3242  *
3243  *****************************************************************************/
3244
3245 /* Hardware specific file defines the PCI IDs table for that hardware module */
3246 static struct pci_device_id iwl_hw_card_ids[] = {
3247 #ifdef CONFIG_IWL4965
3248         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3249         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3250 #endif /* CONFIG_IWL4965 */
3251 #ifdef CONFIG_IWL5000
3252         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3253         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3254         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3255         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3256         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3257         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3258         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3259         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3260         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3261         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3262 /* 5350 WiFi/WiMax */
3263         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3264         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3265         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3266 /* 5150 Wifi/WiMax */
3267         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3268         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3269
3270 /* 6x00 Series */
3271         {IWL_PCI_DEVICE(0x008D, 0x1301, iwl6000h_2agn_cfg)},
3272         {IWL_PCI_DEVICE(0x008D, 0x1321, iwl6000h_2agn_cfg)},
3273         {IWL_PCI_DEVICE(0x008D, 0x1326, iwl6000h_2abg_cfg)},
3274         {IWL_PCI_DEVICE(0x008D, 0x1306, iwl6000h_2abg_cfg)},
3275         {IWL_PCI_DEVICE(0x008D, 0x1307, iwl6000h_2bg_cfg)},
3276         {IWL_PCI_DEVICE(0x008E, 0x1311, iwl6000h_2agn_cfg)},
3277         {IWL_PCI_DEVICE(0x008E, 0x1316, iwl6000h_2abg_cfg)},
3278
3279         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
3280         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
3281         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
3282         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
3283         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
3284         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
3285         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
3286         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
3287         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
3288         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
3289
3290 /* 6x50 WiFi/WiMax Series */
3291         {IWL_PCI_DEVICE(0x0086, 0x1101, iwl6050_3agn_cfg)},
3292         {IWL_PCI_DEVICE(0x0086, 0x1121, iwl6050_3agn_cfg)},
3293         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
3294         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
3295         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
3296         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
3297         {IWL_PCI_DEVICE(0x0088, 0x1111, iwl6050_3agn_cfg)},
3298         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
3299         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
3300
3301 /* 1000 Series WiFi */
3302         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
3303         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
3304         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
3305         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
3306         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
3307         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
3308         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
3309         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
3310         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
3311         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
3312         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
3313         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
3314 #endif /* CONFIG_IWL5000 */
3315
3316         {0}
3317 };
3318 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3319
3320 static struct pci_driver iwl_driver = {
3321         .name = DRV_NAME,
3322         .id_table = iwl_hw_card_ids,
3323         .probe = iwl_pci_probe,
3324         .remove = __devexit_p(iwl_pci_remove),
3325 #ifdef CONFIG_PM
3326         .suspend = iwl_pci_suspend,
3327         .resume = iwl_pci_resume,
3328 #endif
3329 };
3330
3331 static int __init iwl_init(void)
3332 {
3333
3334         int ret;
3335         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3336         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3337
3338         ret = iwlagn_rate_control_register();
3339         if (ret) {
3340                 printk(KERN_ERR DRV_NAME
3341                        "Unable to register rate control algorithm: %d\n", ret);
3342                 return ret;
3343         }
3344
3345         ret = pci_register_driver(&iwl_driver);
3346         if (ret) {
3347                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3348                 goto error_register;
3349         }
3350
3351         return ret;
3352
3353 error_register:
3354         iwlagn_rate_control_unregister();
3355         return ret;
3356 }
3357
3358 static void __exit iwl_exit(void)
3359 {
3360         pci_unregister_driver(&iwl_driver);
3361         iwlagn_rate_control_unregister();
3362 }
3363
3364 module_exit(iwl_exit);
3365 module_init(iwl_init);
3366
3367 #ifdef CONFIG_IWLWIFI_DEBUG
3368 module_param_named(debug50, iwl_debug_level, uint, S_IRUGO);
3369 MODULE_PARM_DESC(debug50, "50XX debug output mask (deprecated)");
3370 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3371 MODULE_PARM_DESC(debug, "debug output mask");
3372 #endif
3373