drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/pci.h>
  36 #include <linux/pci-aspm.h>
  37 #include <linux/slab.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/delay.h>
  40 #include <linux/sched.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/wireless.h>
  44 #include <linux/firmware.h>
  45 #include <linux/etherdevice.h>
  46 #include <linux/if_arp.h>
  47
  48 #include <net/mac80211.h>
  49
  50 #include <asm/div64.h>
  51
  52 #define DRV_NAME        "iwlagn"
  53
  54 #include "iwl-eeprom.h"
  55 #include "iwl-dev.h"
  56 #include "iwl-core.h"
  57 #include "iwl-io.h"
  58 #include "iwl-helpers.h"
  59 #include "iwl-sta.h"
  60 #include "iwl-agn-calib.h"
  61 #include "iwl-agn.h"
  62 #include "iwl-agn-led.h"
  63
  64
  65 /******************************************************************************
  66  *
  67  * module boiler plate
  68  *
  69  ******************************************************************************/
  70
  71 /*
  72  * module name, copyright, version, etc.
  73  */
  74 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  75
  76 #ifdef CONFIG_IWLWIFI_DEBUG
  77 #define VD "d"
  78 #else
  79 #define VD
  80 #endif
  81
  82 #define DRV_VERSION     IWLWIFI_VERSION VD
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90 static int iwlagn_ant_coupling;
  91 static bool iwlagn_bt_ch_announce = 1;
  92
  93 void iwl_update_chain_flags(struct iwl_priv *priv)
  94 {
  95         struct iwl_rxon_context *ctx;
  96
  97         if (priv->cfg->ops->hcmd->set_rxon_chain) {
  98                 for_each_context(priv, ctx) {
  99                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 100                         if (ctx->active.rx_chain != ctx->staging.rx_chain)
 101                                 iwlcore_commit_rxon(priv, ctx);
 102                 }
 103         }
 104 }
 105
 106 static void iwl_clear_free_frames(struct iwl_priv *priv)
 107 {
 108         struct list_head *element;
 109
 110         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 111                        priv->frames_count);
 112
 113         while (!list_empty(&priv->free_frames)) {
 114                 element = priv->free_frames.next;
 115                 list_del(element);
 116                 kfree(list_entry(element, struct iwl_frame, list));
 117                 priv->frames_count--;
 118         }
 119
 120         if (priv->frames_count) {
 121                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 122                             priv->frames_count);
 123                 priv->frames_count = 0;
 124         }
 125 }
 126
 127 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 128 {
 129         struct iwl_frame *frame;
 130         struct list_head *element;
 131         if (list_empty(&priv->free_frames)) {
 132                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 133                 if (!frame) {
 134                         IWL_ERR(priv, "Could not allocate frame!\n");
 135                         return NULL;
 136                 }
 137
 138                 priv->frames_count++;
 139                 return frame;
 140         }
 141
 142         element = priv->free_frames.next;
 143         list_del(element);
 144         return list_entry(element, struct iwl_frame, list);
 145 }
 146
 147 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 148 {
 149         memset(frame, 0, sizeof(*frame));
 150         list_add(&frame->list, &priv->free_frames);
 151 }
 152
 153 static u32 iwl_fill_beacon_frame(struct iwl_priv *priv,
 154                                  struct ieee80211_hdr *hdr,
 155                                  int left)
 156 {
 157         lockdep_assert_held(&priv->mutex);
 158
 159         if (!priv->beacon_skb)
 160                 return 0;
 161
 162         if (priv->beacon_skb->len > left)
 163                 return 0;
 164
 165         memcpy(hdr, priv->beacon_skb->data, priv->beacon_skb->len);
 166
 167         return priv->beacon_skb->len;
 168 }
 169
 170 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 171 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 172                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 173                                u8 *beacon, u32 frame_size)
 174 {
 175         u16 tim_idx;
 176         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 177
 178         /*
 179          * The index is relative to frame start but we start looking at the
 180          * variable-length part of the beacon.
 181          */
 182         tim_idx = mgmt->u.beacon.variable - beacon;
 183
 184         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 185         while ((tim_idx < (frame_size - 2)) &&
 186                         (beacon[tim_idx] != WLAN_EID_TIM))
 187                 tim_idx += beacon[tim_idx+1] + 2;
 188
 189         /* If TIM field was found, set variables */
 190         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 191                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 192                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 193         } else
 194                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 195 }
 196
 197 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 198                                        struct iwl_frame *frame)
 199 {
 200         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 201         u32 frame_size;
 202         u32 rate_flags;
 203         u32 rate;
 204         /*
 205          * We have to set up the TX command, the TX Beacon command, and the
 206          * beacon contents.
 207          */
 208
 209         lockdep_assert_held(&priv->mutex);
 210
 211         if (!priv->beacon_ctx) {
 212                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 213                 return 0;
 214         }
 215
 216         /* Initialize memory */
 217         tx_beacon_cmd = &frame->u.beacon;
 218         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 219
 220         /* Set up TX beacon contents */
 221         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 222                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 223         if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
 224                 return 0;
 225         if (!frame_size)
 226                 return 0;
 227
 228         /* Set up TX command fields */
 229         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 230         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 231         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 232         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 233                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 234
 235         /* Set up TX beacon command fields */
 236         iwl_set_beacon_tim(priv, tx_beacon_cmd, (u8 *)tx_beacon_cmd->frame,
 237                            frame_size);
 238
 239         /* Set up packet rate and flags */
 240         rate = iwl_rate_get_lowest_plcp(priv, priv->beacon_ctx);
 241         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 242                                               priv->hw_params.valid_tx_ant);
 243         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 244         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
 245                 rate_flags |= RATE_MCS_CCK_MSK;
 246         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
 247                         rate_flags);
 248
 249         return sizeof(*tx_beacon_cmd) + frame_size;
 250 }
 251
 252 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 253 {
 254         struct iwl_frame *frame;
 255         unsigned int frame_size;
 256         int rc;
 257
 258         frame = iwl_get_free_frame(priv);
 259         if (!frame) {
 260                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 261                           "command.\n");
 262                 return -ENOMEM;
 263         }
 264
 265         frame_size = iwl_hw_get_beacon_cmd(priv, frame);
 266         if (!frame_size) {
 267                 IWL_ERR(priv, "Error configuring the beacon command\n");
 268                 iwl_free_frame(priv, frame);
 269                 return -EINVAL;
 270         }
 271
 272         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 273                               &frame->u.cmd[0]);
 274
 275         iwl_free_frame(priv, frame);
 276
 277         return rc;
 278 }
 279
 280 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 281 {
 282         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 283
 284         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 285         if (sizeof(dma_addr_t) > sizeof(u32))
 286                 addr |=
 287                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 288
 289         return addr;
 290 }
 291
 292 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 293 {
 294         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 295
 296         return le16_to_cpu(tb->hi_n_len) >> 4;
 297 }
 298
 299 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 300                                   dma_addr_t addr, u16 len)
 301 {
 302         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 303         u16 hi_n_len = len << 4;
 304
 305         put_unaligned_le32(addr, &tb->lo);
 306         if (sizeof(dma_addr_t) > sizeof(u32))
 307                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 308
 309         tb->hi_n_len = cpu_to_le16(hi_n_len);
 310
 311         tfd->num_tbs = idx + 1;
 312 }
 313
 314 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 315 {
 316         return tfd->num_tbs & 0x1f;
 317 }
 318
 319 /**
 320  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 321  * @priv - driver private data
 322  * @txq - tx queue
 323  *
 324  * Does NOT advance any TFD circular buffer read/write indexes
 325  * Does NOT free the TFD itself (which is within circular buffer)
 326  */
 327 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 328 {
 329         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 330         struct iwl_tfd *tfd;
 331         struct pci_dev *dev = priv->pci_dev;
 332         int index = txq->q.read_ptr;
 333         int i;
 334         int num_tbs;
 335
 336         tfd = &tfd_tmp[index];
 337
 338         /* Sanity check on number of chunks */
 339         num_tbs = iwl_tfd_get_num_tbs(tfd);
 340
 341         if (num_tbs >= IWL_NUM_OF_TBS) {
 342                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 343                 /* @todo issue fatal error, it is quite serious situation */
 344                 return;
 345         }
 346
 347         /* Unmap tx_cmd */
 348         if (num_tbs)
 349                 pci_unmap_single(dev,
 350                                 dma_unmap_addr(&txq->meta[index], mapping),
 351                                 dma_unmap_len(&txq->meta[index], len),
 352                                 PCI_DMA_BIDIRECTIONAL);
 353
 354         /* Unmap chunks, if any. */
 355         for (i = 1; i < num_tbs; i++)
 356                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 357                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 358
 359         /* free SKB */
 360         if (txq->txb) {
 361                 struct sk_buff *skb;
 362
 363                 skb = txq->txb[txq->q.read_ptr].skb;
 364
 365                 /* can be called from irqs-disabled context */
 366                 if (skb) {
 367                         dev_kfree_skb_any(skb);
 368                         txq->txb[txq->q.read_ptr].skb = NULL;
 369                 }
 370         }
 371 }
 372
 373 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 374                                  struct iwl_tx_queue *txq,
 375                                  dma_addr_t addr, u16 len,
 376                                  u8 reset, u8 pad)
 377 {
 378         struct iwl_queue *q;
 379         struct iwl_tfd *tfd, *tfd_tmp;
 380         u32 num_tbs;
 381
 382         q = &txq->q;
 383         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 384         tfd = &tfd_tmp[q->write_ptr];
 385
 386         if (reset)
 387                 memset(tfd, 0, sizeof(*tfd));
 388
 389         num_tbs = iwl_tfd_get_num_tbs(tfd);
 390
 391         /* Each TFD can point to a maximum 20 Tx buffers */
 392         if (num_tbs >= IWL_NUM_OF_TBS) {
 393                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 394                           IWL_NUM_OF_TBS);
 395                 return -EINVAL;
 396         }
 397
 398         BUG_ON(addr & ~DMA_BIT_MASK(36));
 399         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 400                 IWL_ERR(priv, "Unaligned address = %llx\n",
 401                           (unsigned long long)addr);
 402
 403         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 404
 405         return 0;
 406 }
 407
 408 /*
 409  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 410  * given Tx queue, and enable the DMA channel used for that queue.
 411  *
 412  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 413  * channels supported in hardware.
 414  */
 415 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 416                          struct iwl_tx_queue *txq)
 417 {
 418         int txq_id = txq->q.id;
 419
 420         /* Circular buffer (TFD queue in DRAM) physical base address */
 421         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 422                              txq->q.dma_addr >> 8);
 423
 424         return 0;
 425 }
 426
 427 /******************************************************************************
 428  *
 429  * Generic RX handler implementations
 430  *
 431  ******************************************************************************/
 432 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 433                                 struct iwl_rx_mem_buffer *rxb)
 434 {
 435         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 436         struct iwl_alive_resp *palive;
 437         struct delayed_work *pwork;
 438
 439         palive = &pkt->u.alive_frame;
 440
 441         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 442                        "0x%01X 0x%01X\n",
 443                        palive->is_valid, palive->ver_type,
 444                        palive->ver_subtype);
 445
 446         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 447                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 448                 memcpy(&priv->card_alive_init,
 449                        &pkt->u.alive_frame,
 450                        sizeof(struct iwl_init_alive_resp));
 451                 pwork = &priv->init_alive_start;
 452         } else {
 453                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 454                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 455                        sizeof(struct iwl_alive_resp));
 456                 pwork = &priv->alive_start;
 457         }
 458
 459         /* We delay the ALIVE response by 5ms to
 460          * give the HW RF Kill time to activate... */
 461         if (palive->is_valid == UCODE_VALID_OK)
 462                 queue_delayed_work(priv->workqueue, pwork,
 463                                    msecs_to_jiffies(5));
 464         else {
 465                 IWL_WARN(priv, "%s uCode did not respond OK.\n",
 466                         (palive->ver_subtype == INITIALIZE_SUBTYPE) ?
 467                         "init" : "runtime");
 468                 /*
 469                  * If fail to load init uCode,
 470                  * let's try to load the init uCode again.
 471                  * We should not get into this situation, but if it
 472                  * does happen, we should not move on and loading "runtime"
 473                  * without proper calibrate the device.
 474                  */
 475                 if (palive->ver_subtype == INITIALIZE_SUBTYPE)
 476                         priv->ucode_type = UCODE_NONE;
 477                 queue_work(priv->workqueue, &priv->restart);
 478         }
 479 }
 480
 481 static void iwl_bg_beacon_update(struct work_struct *work)
 482 {
 483         struct iwl_priv *priv =
 484                 container_of(work, struct iwl_priv, beacon_update);
 485         struct sk_buff *beacon;
 486
 487         mutex_lock(&priv->mutex);
 488         if (!priv->beacon_ctx) {
 489                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 490                 goto out;
 491         }
 492
 493         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 494                 /*
 495                  * The ucode will send beacon notifications even in
 496                  * IBSS mode, but we don't want to process them. But
 497                  * we need to defer the type check to here due to
 498                  * requiring locking around the beacon_ctx access.
 499                  */
 500                 goto out;
 501         }
 502
 503         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 504         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 505         if (!beacon) {
 506                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 507                 goto out;
 508         }
 509
 510         /* new beacon skb is allocated every time; dispose previous.*/
 511         dev_kfree_skb(priv->beacon_skb);
 512
 513         priv->beacon_skb = beacon;
 514
 515         iwlagn_send_beacon_cmd(priv);
 516  out:
 517         mutex_unlock(&priv->mutex);
 518 }
 519
 520 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 521 {
 522         struct iwl_priv *priv =
 523                 container_of(work, struct iwl_priv, bt_runtime_config);
 524
 525         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 526                 return;
 527
 528         /* dont send host command if rf-kill is on */
 529         if (!iwl_is_ready_rf(priv))
 530                 return;
 531         priv->cfg->ops->hcmd->send_bt_config(priv);
 532 }
 533
 534 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 535 {
 536         struct iwl_priv *priv =
 537                 container_of(work, struct iwl_priv, bt_full_concurrency);
 538         struct iwl_rxon_context *ctx;
 539
 540         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 541                 return;
 542
 543         /* dont send host command if rf-kill is on */
 544         if (!iwl_is_ready_rf(priv))
 545                 return;
 546
 547         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 548                        priv->bt_full_concurrent ?
 549                        "full concurrency" : "3-wire");
 550
 551         /*
 552          * LQ & RXON updated cmds must be sent before BT Config cmd
 553          * to avoid 3-wire collisions
 554          */
 555         mutex_lock(&priv->mutex);
 556         for_each_context(priv, ctx) {
 557                 if (priv->cfg->ops->hcmd->set_rxon_chain)
 558                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 559                 iwlcore_commit_rxon(priv, ctx);
 560         }
 561         mutex_unlock(&priv->mutex);
 562
 563         priv->cfg->ops->hcmd->send_bt_config(priv);
 564 }
 565
 566 /**
 567  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 568  *
 569  * This callback is provided in order to send a statistics request.
 570  *
 571  * This timer function is continually reset to execute within
 572  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 573  * was received.  We need to ensure we receive the statistics in order
 574  * to update the temperature used for calibrating the TXPOWER.
 575  */
 576 static void iwl_bg_statistics_periodic(unsigned long data)
 577 {
 578         struct iwl_priv *priv = (struct iwl_priv *)data;
 579
 580         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 581                 return;
 582
 583         /* dont send host command if rf-kill is on */
 584         if (!iwl_is_ready_rf(priv))
 585                 return;
 586
 587         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 588 }
 589
 590
 591 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 592                                         u32 start_idx, u32 num_events,
 593                                         u32 mode)
 594 {
 595         u32 i;
 596         u32 ptr;        /* SRAM byte address of log data */
 597         u32 ev, time, data; /* event log data */
 598         unsigned long reg_flags;
 599
 600         if (mode == 0)
 601                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 602         else
 603                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 604
 605         /* Make sure device is powered up for SRAM reads */
 606         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 607         if (iwl_grab_nic_access(priv)) {
 608                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 609                 return;
 610         }
 611
 612         /* Set starting address; reads will auto-increment */
 613         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
 614         rmb();
 615
 616         /*
 617          * "time" is actually "data" for mode 0 (no timestamp).
 618          * place event id # at far right for easier visual parsing.
 619          */
 620         for (i = 0; i < num_events; i++) {
 621                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 622                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 623                 if (mode == 0) {
 624                         trace_iwlwifi_dev_ucode_cont_event(priv,
 625                                                         0, time, ev);
 626                 } else {
 627                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 628                         trace_iwlwifi_dev_ucode_cont_event(priv,
 629                                                 time, data, ev);
 630                 }
 631         }
 632         /* Allow device to power down */
 633         iwl_release_nic_access(priv);
 634         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 635 }
 636
 637 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 638 {
 639         u32 capacity;   /* event log capacity in # entries */
 640         u32 base;       /* SRAM byte address of event log header */
 641         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 642         u32 num_wraps;  /* # times uCode wrapped to top of log */
 643         u32 next_entry; /* index of next entry to be written by uCode */
 644
 645         if (priv->ucode_type == UCODE_INIT)
 646                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
 647         else
 648                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
 649         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
 650                 capacity = iwl_read_targ_mem(priv, base);
 651                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
 652                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
 653                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
 654         } else
 655                 return;
 656
 657         if (num_wraps == priv->event_log.num_wraps) {
 658                 iwl_print_cont_event_trace(priv,
 659                                        base, priv->event_log.next_entry,
 660                                        next_entry - priv->event_log.next_entry,
 661                                        mode);
 662                 priv->event_log.non_wraps_count++;
 663         } else {
 664                 if ((num_wraps - priv->event_log.num_wraps) > 1)
 665                         priv->event_log.wraps_more_count++;
 666                 else
 667                         priv->event_log.wraps_once_count++;
 668                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 669                                 num_wraps - priv->event_log.num_wraps,
 670                                 next_entry, priv->event_log.next_entry);
 671                 if (next_entry < priv->event_log.next_entry) {
 672                         iwl_print_cont_event_trace(priv, base,
 673                                priv->event_log.next_entry,
 674                                capacity - priv->event_log.next_entry,
 675                                mode);
 676
 677                         iwl_print_cont_event_trace(priv, base, 0,
 678                                 next_entry, mode);
 679                 } else {
 680                         iwl_print_cont_event_trace(priv, base,
 681                                next_entry, capacity - next_entry,
 682                                mode);
 683
 684                         iwl_print_cont_event_trace(priv, base, 0,
 685                                 next_entry, mode);
 686                 }
 687         }
 688         priv->event_log.num_wraps = num_wraps;
 689         priv->event_log.next_entry = next_entry;
 690 }
 691
 692 /**
 693  * iwl_bg_ucode_trace - Timer callback to log ucode event
 694  *
 695  * The timer is continually set to execute every
 696  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 697  * this function is to perform continuous uCode event logging operation
 698  * if enabled
 699  */
 700 static void iwl_bg_ucode_trace(unsigned long data)
 701 {
 702         struct iwl_priv *priv = (struct iwl_priv *)data;
 703
 704         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 705                 return;
 706
 707         if (priv->event_log.ucode_trace) {
 708                 iwl_continuous_event_trace(priv);
 709                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 710                 mod_timer(&priv->ucode_trace,
 711                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 712         }
 713 }
 714
 715 static void iwlagn_rx_beacon_notif(struct iwl_priv *priv,
 716                                    struct iwl_rx_mem_buffer *rxb)
 717 {
 718         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 719         struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw;
 720 #ifdef CONFIG_IWLWIFI_DEBUG
 721         u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
 722         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 723
 724         IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
 725                 "tsf:0x%.8x%.8x rate:%d\n",
 726                 status & TX_STATUS_MSK,
 727                 beacon->beacon_notify_hdr.failure_frame,
 728                 le32_to_cpu(beacon->ibss_mgr_status),
 729                 le32_to_cpu(beacon->high_tsf),
 730                 le32_to_cpu(beacon->low_tsf), rate);
 731 #endif
 732
 733         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 734
 735         if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
 736                 queue_work(priv->workqueue, &priv->beacon_update);
 737 }
 738
 739 /* Handle notification from uCode that card's power state is changing
 740  * due to software, hardware, or critical temperature RFKILL */
 741 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 742                                     struct iwl_rx_mem_buffer *rxb)
 743 {
 744         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 745         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 746         unsigned long status = priv->status;
 747
 748         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
 749                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 750                           (flags & SW_CARD_DISABLED) ? "Kill" : "On",
 751                           (flags & CT_CARD_DISABLED) ?
 752                           "Reached" : "Not reached");
 753
 754         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 755                      CT_CARD_DISABLED)) {
 756
 757                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 758                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 759
 760                 iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 761                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 762
 763                 if (!(flags & RXON_CARD_DISABLED)) {
 764                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 765                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 766                         iwl_write_direct32(priv, HBUS_TARG_MBX_C,
 767                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 768                 }
 769                 if (flags & CT_CARD_DISABLED)
 770                         iwl_tt_enter_ct_kill(priv);
 771         }
 772         if (!(flags & CT_CARD_DISABLED))
 773                 iwl_tt_exit_ct_kill(priv);
 774
 775         if (flags & HW_CARD_DISABLED)
 776                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 777         else
 778                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 779
 780
 781         if (!(flags & RXON_CARD_DISABLED))
 782                 iwl_scan_cancel(priv);
 783
 784         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 785              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 786                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 787                         test_bit(STATUS_RF_KILL_HW, &priv->status));
 788         else
 789                 wake_up_interruptible(&priv->wait_command_queue);
 790 }
 791
 792 static void iwl_bg_tx_flush(struct work_struct *work)
 793 {
 794         struct iwl_priv *priv =
 795                 container_of(work, struct iwl_priv, tx_flush);
 796
 797         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 798                 return;
 799
 800         /* do nothing if rf-kill is on */
 801         if (!iwl_is_ready_rf(priv))
 802                 return;
 803
 804         if (priv->cfg->ops->lib->txfifo_flush) {
 805                 IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 806                 iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 807         }
 808 }
 809
 810 /**
 811  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 812  *
 813  * Setup the RX handlers for each of the reply types sent from the uCode
 814  * to the host.
 815  *
 816  * This function chains into the hardware specific files for them to setup
 817  * any hardware specific handlers as well.
 818  */
 819 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 820 {
 821         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 822         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 823         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 824         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 825                         iwl_rx_spectrum_measure_notif;
 826         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 827         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 828             iwl_rx_pm_debug_statistics_notif;
 829         priv->rx_handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif;
 830
 831         /*
 832          * The same handler is used for both the REPLY to a discrete
 833          * statistics request from the host as well as for the periodic
 834          * statistics notifications (after received beacons) from the uCode.
 835          */
 836         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_reply_statistics;
 837         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 838
 839         iwl_setup_rx_scan_handlers(priv);
 840
 841         /* status change handler */
 842         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 843
 844         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 845             iwl_rx_missed_beacon_notif;
 846         /* Rx handlers */
 847         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
 848         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
 849         /* block ack */
 850         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwlagn_rx_reply_compressed_ba;
 851         /* Set up hardware specific Rx handlers */
 852         priv->cfg->ops->lib->rx_handler_setup(priv);
 853 }
 854
 855 /**
 856  * iwl_rx_handle - Main entry function for receiving responses from uCode
 857  *
 858  * Uses the priv->rx_handlers callback function array to invoke
 859  * the appropriate handlers, including command responses,
 860  * frame-received notifications, and other notifications.
 861  */
 862 static void iwl_rx_handle(struct iwl_priv *priv)
 863 {
 864         struct iwl_rx_mem_buffer *rxb;
 865         struct iwl_rx_packet *pkt;
 866         struct iwl_rx_queue *rxq = &priv->rxq;
 867         u32 r, i;
 868         int reclaim;
 869         unsigned long flags;
 870         u8 fill_rx = 0;
 871         u32 count = 8;
 872         int total_empty;
 873
 874         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 875          * buffer that the driver may process (last buffer filled by ucode). */
 876         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 877         i = rxq->read;
 878
 879         /* Rx interrupt, but nothing sent from uCode */
 880         if (i == r)
 881                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 882
 883         /* calculate total frames need to be restock after handling RX */
 884         total_empty = r - rxq->write_actual;
 885         if (total_empty < 0)
 886                 total_empty += RX_QUEUE_SIZE;
 887
 888         if (total_empty > (RX_QUEUE_SIZE / 2))
 889                 fill_rx = 1;
 890
 891         while (i != r) {
 892                 int len;
 893
 894                 rxb = rxq->queue[i];
 895
 896                 /* If an RXB doesn't have a Rx queue slot associated with it,
 897                  * then a bug has been introduced in the queue refilling
 898                  * routines -- catch it here */
 899                 BUG_ON(rxb == NULL);
 900
 901                 rxq->queue[i] = NULL;
 902
 903                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
 904                                PAGE_SIZE << priv->hw_params.rx_page_order,
 905                                PCI_DMA_FROMDEVICE);
 906                 pkt = rxb_addr(rxb);
 907
 908                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 909                 len += sizeof(u32); /* account for status word */
 910                 trace_iwlwifi_dev_rx(priv, pkt, len);
 911
 912                 /* Reclaim a command buffer only if this packet is a response
 913                  *   to a (driver-originated) command.
 914                  * If the packet (e.g. Rx frame) originated from uCode,
 915                  *   there is no command buffer to reclaim.
 916                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 917                  *   but apparently a few don't get set; catch them here. */
 918                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 919                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 920                         (pkt->hdr.cmd != REPLY_RX) &&
 921                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 922                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 923                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 924                         (pkt->hdr.cmd != REPLY_TX);
 925
 926                 /*
 927                  * Do the notification wait before RX handlers so
 928                  * even if the RX handler consumes the RXB we have
 929                  * access to it in the notification wait entry.
 930                  */
 931                 if (!list_empty(&priv->_agn.notif_waits)) {
 932                         struct iwl_notification_wait *w;
 933
 934                         spin_lock(&priv->_agn.notif_wait_lock);
 935                         list_for_each_entry(w, &priv->_agn.notif_waits, list) {
 936                                 if (w->cmd == pkt->hdr.cmd) {
 937                                         w->triggered = true;
 938                                         if (w->fn)
 939                                                 w->fn(priv, pkt);
 940                                 }
 941                         }
 942                         spin_unlock(&priv->_agn.notif_wait_lock);
 943
 944                         wake_up_all(&priv->_agn.notif_waitq);
 945                 }
 946
 947                 /* Based on type of command response or notification,
 948                  *   handle those that need handling via function in
 949                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 950                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 951                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 952                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 953                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 954                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 955                 } else {
 956                         /* No handling needed */
 957                         IWL_DEBUG_RX(priv,
 958                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 959                                 r, i, get_cmd_string(pkt->hdr.cmd),
 960                                 pkt->hdr.cmd);
 961                 }
 962
 963                 /*
 964                  * XXX: After here, we should always check rxb->page
 965                  * against NULL before touching it or its virtual
 966                  * memory (pkt). Because some rx_handler might have
 967                  * already taken or freed the pages.
 968                  */
 969
 970                 if (reclaim) {
 971                         /* Invoke any callbacks, transfer the buffer to caller,
 972                          * and fire off the (possibly) blocking iwl_send_cmd()
 973                          * as we reclaim the driver command queue */
 974                         if (rxb->page)
 975                                 iwl_tx_cmd_complete(priv, rxb);
 976                         else
 977                                 IWL_WARN(priv, "Claim null rxb?\n");
 978                 }
 979
 980                 /* Reuse the page if possible. For notification packets and
 981                  * SKBs that fail to Rx correctly, add them back into the
 982                  * rx_free list for reuse later. */
 983                 spin_lock_irqsave(&rxq->lock, flags);
 984                 if (rxb->page != NULL) {
 985                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
 986                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
 987                                 PCI_DMA_FROMDEVICE);
 988                         list_add_tail(&rxb->list, &rxq->rx_free);
 989                         rxq->free_count++;
 990                 } else
 991                         list_add_tail(&rxb->list, &rxq->rx_used);
 992
 993                 spin_unlock_irqrestore(&rxq->lock, flags);
 994
 995                 i = (i + 1) & RX_QUEUE_MASK;
 996                 /* If there are a lot of unused frames,
 997                  * restock the Rx queue so ucode wont assert. */
 998                 if (fill_rx) {
 999                         count++;
1000                         if (count >= 8) {
1001                                 rxq->read = i;
1002                                 iwlagn_rx_replenish_now(priv);
1003                                 count = 0;
1004                         }
1005                 }
1006         }
1007
1008         /* Backtrack one entry */
1009         rxq->read = i;
1010         if (fill_rx)
1011                 iwlagn_rx_replenish_now(priv);
1012         else
1013                 iwlagn_rx_queue_restock(priv);
1014 }
1015
1016 /* call this function to flush any scheduled tasklet */
1017 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1018 {
1019         /* wait to make sure we flush pending tasklet*/
1020         synchronize_irq(priv->pci_dev->irq);
1021         tasklet_kill(&priv->irq_tasklet);
1022 }
1023
1024 static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
1025 {
1026         u32 inta, handled = 0;
1027         u32 inta_fh;
1028         unsigned long flags;
1029         u32 i;
1030 #ifdef CONFIG_IWLWIFI_DEBUG
1031         u32 inta_mask;
1032 #endif
1033
1034         spin_lock_irqsave(&priv->lock, flags);
1035
1036         /* Ack/clear/reset pending uCode interrupts.
1037          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1038          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1039         inta = iwl_read32(priv, CSR_INT);
1040         iwl_write32(priv, CSR_INT, inta);
1041
1042         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1043          * Any new interrupts that happen after this, either while we're
1044          * in this tasklet, or later, will show up in next ISR/tasklet. */
1045         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1046         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1047
1048 #ifdef CONFIG_IWLWIFI_DEBUG
1049         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1050                 /* just for debug */
1051                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1052                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1053                               inta, inta_mask, inta_fh);
1054         }
1055 #endif
1056
1057         spin_unlock_irqrestore(&priv->lock, flags);
1058
1059         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1060          * atomic, make sure that inta covers all the interrupts that
1061          * we've discovered, even if FH interrupt came in just after
1062          * reading CSR_INT. */
1063         if (inta_fh & CSR49_FH_INT_RX_MASK)
1064                 inta |= CSR_INT_BIT_FH_RX;
1065         if (inta_fh & CSR49_FH_INT_TX_MASK)
1066                 inta |= CSR_INT_BIT_FH_TX;
1067
1068         /* Now service all interrupt bits discovered above. */
1069         if (inta & CSR_INT_BIT_HW_ERR) {
1070                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1071
1072                 /* Tell the device to stop sending interrupts */
1073                 iwl_disable_interrupts(priv);
1074
1075                 priv->isr_stats.hw++;
1076                 iwl_irq_handle_error(priv);
1077
1078                 handled |= CSR_INT_BIT_HW_ERR;
1079
1080                 return;
1081         }
1082
1083 #ifdef CONFIG_IWLWIFI_DEBUG
1084         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1085                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1086                 if (inta & CSR_INT_BIT_SCD) {
1087                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1088                                       "the frame/frames.\n");
1089                         priv->isr_stats.sch++;
1090                 }
1091
1092                 /* Alive notification via Rx interrupt will do the real work */
1093                 if (inta & CSR_INT_BIT_ALIVE) {
1094                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1095                         priv->isr_stats.alive++;
1096                 }
1097         }
1098 #endif
1099         /* Safely ignore these bits for debug checks below */
1100         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1101
1102         /* HW RF KILL switch toggled */
1103         if (inta & CSR_INT_BIT_RF_KILL) {
1104                 int hw_rf_kill = 0;
1105                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1106                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1107                         hw_rf_kill = 1;
1108
1109                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1110                                 hw_rf_kill ? "disable radio" : "enable radio");
1111
1112                 priv->isr_stats.rfkill++;
1113
1114                 /* driver only loads ucode once setting the interface up.
1115                  * the driver allows loading the ucode even if the radio
1116                  * is killed. Hence update the killswitch state here. The
1117                  * rfkill handler will care about restarting if needed.
1118                  */
1119                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1120                         if (hw_rf_kill)
1121                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1122                         else
1123                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1124                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1125                 }
1126
1127                 handled |= CSR_INT_BIT_RF_KILL;
1128         }
1129
1130         /* Chip got too hot and stopped itself */
1131         if (inta & CSR_INT_BIT_CT_KILL) {
1132                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1133                 priv->isr_stats.ctkill++;
1134                 handled |= CSR_INT_BIT_CT_KILL;
1135         }
1136
1137         /* Error detected by uCode */
1138         if (inta & CSR_INT_BIT_SW_ERR) {
1139                 IWL_ERR(priv, "Microcode SW error detected. "
1140                         " Restarting 0x%X.\n", inta);
1141                 priv->isr_stats.sw++;
1142                 iwl_irq_handle_error(priv);
1143                 handled |= CSR_INT_BIT_SW_ERR;
1144         }
1145
1146         /*
1147          * uCode wakes up after power-down sleep.
1148          * Tell device about any new tx or host commands enqueued,
1149          * and about any Rx buffers made available while asleep.
1150          */
1151         if (inta & CSR_INT_BIT_WAKEUP) {
1152                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1153                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1154                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1155                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1156                 priv->isr_stats.wakeup++;
1157                 handled |= CSR_INT_BIT_WAKEUP;
1158         }
1159
1160         /* All uCode command responses, including Tx command responses,
1161          * Rx "responses" (frame-received notification), and other
1162          * notifications from uCode come through here*/
1163         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1164                 iwl_rx_handle(priv);
1165                 priv->isr_stats.rx++;
1166                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1167         }
1168
1169         /* This "Tx" DMA channel is used only for loading uCode */
1170         if (inta & CSR_INT_BIT_FH_TX) {
1171                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1172                 priv->isr_stats.tx++;
1173                 handled |= CSR_INT_BIT_FH_TX;
1174                 /* Wake up uCode load routine, now that load is complete */
1175                 priv->ucode_write_complete = 1;
1176                 wake_up_interruptible(&priv->wait_command_queue);
1177         }
1178
1179         if (inta & ~handled) {
1180                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1181                 priv->isr_stats.unhandled++;
1182         }
1183
1184         if (inta & ~(priv->inta_mask)) {
1185                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1186                          inta & ~priv->inta_mask);
1187                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1188         }
1189
1190         /* Re-enable all interrupts */
1191         /* only Re-enable if disabled by irq */
1192         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1193                 iwl_enable_interrupts(priv);
1194         /* Re-enable RF_KILL if it occurred */
1195         else if (handled & CSR_INT_BIT_RF_KILL)
1196                 iwl_enable_rfkill_int(priv);
1197
1198 #ifdef CONFIG_IWLWIFI_DEBUG
1199         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1200                 inta = iwl_read32(priv, CSR_INT);
1201                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1202                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1203                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1204                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1205         }
1206 #endif
1207 }
1208
1209 /* tasklet for iwlagn interrupt */
1210 static void iwl_irq_tasklet(struct iwl_priv *priv)
1211 {
1212         u32 inta = 0;
1213         u32 handled = 0;
1214         unsigned long flags;
1215         u32 i;
1216 #ifdef CONFIG_IWLWIFI_DEBUG
1217         u32 inta_mask;
1218 #endif
1219
1220         spin_lock_irqsave(&priv->lock, flags);
1221
1222         /* Ack/clear/reset pending uCode interrupts.
1223          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1224          */
1225         /* There is a hardware bug in the interrupt mask function that some
1226          * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
1227          * they are disabled in the CSR_INT_MASK register. Furthermore the
1228          * ICT interrupt handling mechanism has another bug that might cause
1229          * these unmasked interrupts fail to be detected. We workaround the
1230          * hardware bugs here by ACKing all the possible interrupts so that
1231          * interrupt coalescing can still be achieved.
1232          */
1233         iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
1234
1235         inta = priv->_agn.inta;
1236
1237 #ifdef CONFIG_IWLWIFI_DEBUG
1238         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1239                 /* just for debug */
1240                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1241                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
1242                                 inta, inta_mask);
1243         }
1244 #endif
1245
1246         spin_unlock_irqrestore(&priv->lock, flags);
1247
1248         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
1249         priv->_agn.inta = 0;
1250
1251         /* Now service all interrupt bits discovered above. */
1252         if (inta & CSR_INT_BIT_HW_ERR) {
1253                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1254
1255                 /* Tell the device to stop sending interrupts */
1256                 iwl_disable_interrupts(priv);
1257
1258                 priv->isr_stats.hw++;
1259                 iwl_irq_handle_error(priv);
1260
1261                 handled |= CSR_INT_BIT_HW_ERR;
1262
1263                 return;
1264         }
1265
1266 #ifdef CONFIG_IWLWIFI_DEBUG
1267         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1268                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1269                 if (inta & CSR_INT_BIT_SCD) {
1270                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1271                                       "the frame/frames.\n");
1272                         priv->isr_stats.sch++;
1273                 }
1274
1275                 /* Alive notification via Rx interrupt will do the real work */
1276                 if (inta & CSR_INT_BIT_ALIVE) {
1277                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1278                         priv->isr_stats.alive++;
1279                 }
1280         }
1281 #endif
1282         /* Safely ignore these bits for debug checks below */
1283         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1284
1285         /* HW RF KILL switch toggled */
1286         if (inta & CSR_INT_BIT_RF_KILL) {
1287                 int hw_rf_kill = 0;
1288                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1289                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1290                         hw_rf_kill = 1;
1291
1292                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
1293                                 hw_rf_kill ? "disable radio" : "enable radio");
1294
1295                 priv->isr_stats.rfkill++;
1296
1297                 /* driver only loads ucode once setting the interface up.
1298                  * the driver allows loading the ucode even if the radio
1299                  * is killed. Hence update the killswitch state here. The
1300                  * rfkill handler will care about restarting if needed.
1301                  */
1302                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1303                         if (hw_rf_kill)
1304                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1305                         else
1306                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1307                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
1308                 }
1309
1310                 handled |= CSR_INT_BIT_RF_KILL;
1311         }
1312
1313         /* Chip got too hot and stopped itself */
1314         if (inta & CSR_INT_BIT_CT_KILL) {
1315                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1316                 priv->isr_stats.ctkill++;
1317                 handled |= CSR_INT_BIT_CT_KILL;
1318         }
1319
1320         /* Error detected by uCode */
1321         if (inta & CSR_INT_BIT_SW_ERR) {
1322                 IWL_ERR(priv, "Microcode SW error detected. "
1323                         " Restarting 0x%X.\n", inta);
1324                 priv->isr_stats.sw++;
1325                 iwl_irq_handle_error(priv);
1326                 handled |= CSR_INT_BIT_SW_ERR;
1327         }
1328
1329         /* uCode wakes up after power-down sleep */
1330         if (inta & CSR_INT_BIT_WAKEUP) {
1331                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1332                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1333                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
1334                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
1335
1336                 priv->isr_stats.wakeup++;
1337
1338                 handled |= CSR_INT_BIT_WAKEUP;
1339         }
1340
1341         /* All uCode command responses, including Tx command responses,
1342          * Rx "responses" (frame-received notification), and other
1343          * notifications from uCode come through here*/
1344         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
1345                         CSR_INT_BIT_RX_PERIODIC)) {
1346                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
1347                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1348                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1349                         iwl_write32(priv, CSR_FH_INT_STATUS,
1350                                         CSR49_FH_INT_RX_MASK);
1351                 }
1352                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
1353                         handled |= CSR_INT_BIT_RX_PERIODIC;
1354                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
1355                 }
1356                 /* Sending RX interrupt require many steps to be done in the
1357                  * the device:
1358                  * 1- write interrupt to current index in ICT table.
1359                  * 2- dma RX frame.
1360                  * 3- update RX shared data to indicate last write index.
1361                  * 4- send interrupt.
1362                  * This could lead to RX race, driver could receive RX interrupt
1363                  * but the shared data changes does not reflect this;
1364                  * periodic interrupt will detect any dangling Rx activity.
1365                  */
1366
1367                 /* Disable periodic interrupt; we use it as just a one-shot. */
1368                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
1369                             CSR_INT_PERIODIC_DIS);
1370                 iwl_rx_handle(priv);
1371
1372                 /*
1373                  * Enable periodic interrupt in 8 msec only if we received
1374                  * real RX interrupt (instead of just periodic int), to catch
1375                  * any dangling Rx interrupt.  If it was just the periodic
1376                  * interrupt, there was no dangling Rx activity, and no need
1377                  * to extend the periodic interrupt; one-shot is enough.
1378                  */
1379                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
1380                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
1381                                     CSR_INT_PERIODIC_ENA);
1382
1383                 priv->isr_stats.rx++;
1384         }
1385
1386         /* This "Tx" DMA channel is used only for loading uCode */
1387         if (inta & CSR_INT_BIT_FH_TX) {
1388                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
1389                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
1390                 priv->isr_stats.tx++;
1391                 handled |= CSR_INT_BIT_FH_TX;
1392                 /* Wake up uCode load routine, now that load is complete */
1393                 priv->ucode_write_complete = 1;
1394                 wake_up_interruptible(&priv->wait_command_queue);
1395         }
1396
1397         if (inta & ~handled) {
1398                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1399                 priv->isr_stats.unhandled++;
1400         }
1401
1402         if (inta & ~(priv->inta_mask)) {
1403                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1404                          inta & ~priv->inta_mask);
1405         }
1406
1407         /* Re-enable all interrupts */
1408         /* only Re-enable if disabled by irq */
1409         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1410                 iwl_enable_interrupts(priv);
1411         /* Re-enable RF_KILL if it occurred */
1412         else if (handled & CSR_INT_BIT_RF_KILL)
1413                 iwl_enable_rfkill_int(priv);
1414 }
1415
1416 /*****************************************************************************
1417  *
1418  * sysfs attributes
1419  *
1420  *****************************************************************************/
1421
1422 #ifdef CONFIG_IWLWIFI_DEBUG
1423
1424 /*
1425  * The following adds a new attribute to the sysfs representation
1426  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
1427  * used for controlling the debug level.
1428  *
1429  * See the level definitions in iwl for details.
1430  *
1431  * The debug_level being managed using sysfs below is a per device debug
1432  * level that is used instead of the global debug level if it (the per
1433  * device debug level) is set.
1434  */
1435 static ssize_t show_debug_level(struct device *d,
1436                                 struct device_attribute *attr, char *buf)
1437 {
1438         struct iwl_priv *priv = dev_get_drvdata(d);
1439         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
1440 }
1441 static ssize_t store_debug_level(struct device *d,
1442                                 struct device_attribute *attr,
1443                                  const char *buf, size_t count)
1444 {
1445         struct iwl_priv *priv = dev_get_drvdata(d);
1446         unsigned long val;
1447         int ret;
1448
1449         ret = strict_strtoul(buf, 0, &val);
1450         if (ret)
1451                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
1452         else {
1453                 priv->debug_level = val;
1454                 if (iwl_alloc_traffic_mem(priv))
1455                         IWL_ERR(priv,
1456                                 "Not enough memory to generate traffic log\n");
1457         }
1458         return strnlen(buf, count);
1459 }
1460
1461 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
1462                         show_debug_level, store_debug_level);
1463
1464
1465 #endif /* CONFIG_IWLWIFI_DEBUG */
1466
1467
1468 static ssize_t show_temperature(struct device *d,
1469                                 struct device_attribute *attr, char *buf)
1470 {
1471         struct iwl_priv *priv = dev_get_drvdata(d);
1472
1473         if (!iwl_is_alive(priv))
1474                 return -EAGAIN;
1475
1476         return sprintf(buf, "%d\n", priv->temperature);
1477 }
1478
1479 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
1480
1481 static ssize_t show_tx_power(struct device *d,
1482                              struct device_attribute *attr, char *buf)
1483 {
1484         struct iwl_priv *priv = dev_get_drvdata(d);
1485
1486         if (!iwl_is_ready_rf(priv))
1487                 return sprintf(buf, "off\n");
1488         else
1489                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
1490 }
1491
1492 static ssize_t store_tx_power(struct device *d,
1493                               struct device_attribute *attr,
1494                               const char *buf, size_t count)
1495 {
1496         struct iwl_priv *priv = dev_get_drvdata(d);
1497         unsigned long val;
1498         int ret;
1499
1500         ret = strict_strtoul(buf, 10, &val);
1501         if (ret)
1502                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
1503         else {
1504                 ret = iwl_set_tx_power(priv, val, false);
1505                 if (ret)
1506                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
1507                                 ret);
1508                 else
1509                         ret = count;
1510         }
1511         return ret;
1512 }
1513
1514 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
1515
1516 static struct attribute *iwl_sysfs_entries[] = {
1517         &dev_attr_temperature.attr,
1518         &dev_attr_tx_power.attr,
1519 #ifdef CONFIG_IWLWIFI_DEBUG
1520         &dev_attr_debug_level.attr,
1521 #endif
1522         NULL
1523 };
1524
1525 static struct attribute_group iwl_attribute_group = {
1526         .name = NULL,           /* put in device directory */
1527         .attrs = iwl_sysfs_entries,
1528 };
1529
1530 /******************************************************************************
1531  *
1532  * uCode download functions
1533  *
1534  ******************************************************************************/
1535
1536 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1537 {
1538         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1539         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1540         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1541         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1542         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1543         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1544 }
1545
1546 static void iwl_nic_start(struct iwl_priv *priv)
1547 {
1548         /* Remove all resets to allow NIC to operate */
1549         iwl_write32(priv, CSR_RESET, 0);
1550 }
1551
1552 struct iwlagn_ucode_capabilities {
1553         u32 max_probe_length;
1554         u32 standard_phy_calibration_size;
1555         bool pan;
1556 };
1557
1558 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1559 static int iwl_mac_setup_register(struct iwl_priv *priv,
1560                                   struct iwlagn_ucode_capabilities *capa);
1561
1562 #define UCODE_EXPERIMENTAL_INDEX        100
1563 #define UCODE_EXPERIMENTAL_TAG          "exp"
1564
1565 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1566 {
1567         const char *name_pre = priv->cfg->fw_name_pre;
1568         char tag[8];
1569
1570         if (first) {
1571 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1572                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1573                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1574         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1575 #endif
1576                 priv->fw_index = priv->cfg->ucode_api_max;
1577                 sprintf(tag, "%d", priv->fw_index);
1578         } else {
1579                 priv->fw_index--;
1580                 sprintf(tag, "%d", priv->fw_index);
1581         }
1582
1583         if (priv->fw_index < priv->cfg->ucode_api_min) {
1584                 IWL_ERR(priv, "no suitable firmware found!\n");
1585                 return -ENOENT;
1586         }
1587
1588         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1589
1590         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1591                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1592                                 ? "EXPERIMENTAL " : "",
1593                        priv->firmware_name);
1594
1595         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1596                                        &priv->pci_dev->dev, GFP_KERNEL, priv,
1597                                        iwl_ucode_callback);
1598 }
1599
1600 struct iwlagn_firmware_pieces {
1601         const void *inst, *data, *init, *init_data, *boot;
1602         size_t inst_size, data_size, init_size, init_data_size, boot_size;
1603
1604         u32 build;
1605
1606         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1607         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1608 };
1609
1610 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1611                                        const struct firmware *ucode_raw,
1612                                        struct iwlagn_firmware_pieces *pieces)
1613 {
1614         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1615         u32 api_ver, hdr_size;
1616         const u8 *src;
1617
1618         priv->ucode_ver = le32_to_cpu(ucode->ver);
1619         api_ver = IWL_UCODE_API(priv->ucode_ver);
1620
1621         switch (api_ver) {
1622         default:
1623                 /*
1624                  * 4965 doesn't revision the firmware file format
1625                  * along with the API version, it always uses v1
1626                  * file format.
1627                  */
1628                 if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) !=
1629                                 CSR_HW_REV_TYPE_4965) {
1630                         hdr_size = 28;
1631                         if (ucode_raw->size < hdr_size) {
1632                                 IWL_ERR(priv, "File size too small!\n");
1633                                 return -EINVAL;
1634                         }
1635                         pieces->build = le32_to_cpu(ucode->u.v2.build);
1636                         pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1637                         pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1638                         pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1639                         pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1640                         pieces->boot_size = le32_to_cpu(ucode->u.v2.boot_size);
1641                         src = ucode->u.v2.data;
1642                         break;
1643                 }
1644                 /* fall through for 4965 */
1645         case 0:
1646         case 1:
1647         case 2:
1648                 hdr_size = 24;
1649                 if (ucode_raw->size < hdr_size) {
1650                         IWL_ERR(priv, "File size too small!\n");
1651                         return -EINVAL;
1652                 }
1653                 pieces->build = 0;
1654                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1655                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1656                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1657                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1658                 pieces->boot_size = le32_to_cpu(ucode->u.v1.boot_size);
1659                 src = ucode->u.v1.data;
1660                 break;
1661         }
1662
1663         /* Verify size of file vs. image size info in file's header */
1664         if (ucode_raw->size != hdr_size + pieces->inst_size +
1665                                 pieces->data_size + pieces->init_size +
1666                                 pieces->init_data_size + pieces->boot_size) {
1667
1668                 IWL_ERR(priv,
1669                         "uCode file size %d does not match expected size\n",
1670                         (int)ucode_raw->size);
1671                 return -EINVAL;
1672         }
1673
1674         pieces->inst = src;
1675         src += pieces->inst_size;
1676         pieces->data = src;
1677         src += pieces->data_size;
1678         pieces->init = src;
1679         src += pieces->init_size;
1680         pieces->init_data = src;
1681         src += pieces->init_data_size;
1682         pieces->boot = src;
1683         src += pieces->boot_size;
1684
1685         return 0;
1686 }
1687
1688 static int iwlagn_wanted_ucode_alternative = 1;
1689
1690 static int iwlagn_load_firmware(struct iwl_priv *priv,
1691                                 const struct firmware *ucode_raw,
1692                                 struct iwlagn_firmware_pieces *pieces,
1693                                 struct iwlagn_ucode_capabilities *capa)
1694 {
1695         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1696         struct iwl_ucode_tlv *tlv;
1697         size_t len = ucode_raw->size;
1698         const u8 *data;
1699         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1700         u64 alternatives;
1701         u32 tlv_len;
1702         enum iwl_ucode_tlv_type tlv_type;
1703         const u8 *tlv_data;
1704
1705         if (len < sizeof(*ucode)) {
1706                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1707                 return -EINVAL;
1708         }
1709
1710         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1711                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1712                         le32_to_cpu(ucode->magic));
1713                 return -EINVAL;
1714         }
1715
1716         /*
1717          * Check which alternatives are present, and "downgrade"
1718          * when the chosen alternative is not present, warning
1719          * the user when that happens. Some files may not have
1720          * any alternatives, so don't warn in that case.
1721          */
1722         alternatives = le64_to_cpu(ucode->alternatives);
1723         tmp = wanted_alternative;
1724         if (wanted_alternative > 63)
1725                 wanted_alternative = 63;
1726         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1727                 wanted_alternative--;
1728         if (wanted_alternative && wanted_alternative != tmp)
1729                 IWL_WARN(priv,
1730                          "uCode alternative %d not available, choosing %d\n",
1731                          tmp, wanted_alternative);
1732
1733         priv->ucode_ver = le32_to_cpu(ucode->ver);
1734         pieces->build = le32_to_cpu(ucode->build);
1735         data = ucode->data;
1736
1737         len -= sizeof(*ucode);
1738
1739         while (len >= sizeof(*tlv)) {
1740                 u16 tlv_alt;
1741
1742                 len -= sizeof(*tlv);
1743                 tlv = (void *)data;
1744
1745                 tlv_len = le32_to_cpu(tlv->length);
1746                 tlv_type = le16_to_cpu(tlv->type);
1747                 tlv_alt = le16_to_cpu(tlv->alternative);
1748                 tlv_data = tlv->data;
1749
1750                 if (len < tlv_len) {
1751                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1752                                 len, tlv_len);
1753                         return -EINVAL;
1754                 }
1755                 len -= ALIGN(tlv_len, 4);
1756                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1757
1758                 /*
1759                  * Alternative 0 is always valid.
1760                  *
1761                  * Skip alternative TLVs that are not selected.
1762                  */
1763                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1764                         continue;
1765
1766                 switch (tlv_type) {
1767                 case IWL_UCODE_TLV_INST:
1768                         pieces->inst = tlv_data;
1769                         pieces->inst_size = tlv_len;
1770                         break;
1771                 case IWL_UCODE_TLV_DATA:
1772                         pieces->data = tlv_data;
1773                         pieces->data_size = tlv_len;
1774                         break;
1775                 case IWL_UCODE_TLV_INIT:
1776                         pieces->init = tlv_data;
1777                         pieces->init_size = tlv_len;
1778                         break;
1779                 case IWL_UCODE_TLV_INIT_DATA:
1780                         pieces->init_data = tlv_data;
1781                         pieces->init_data_size = tlv_len;
1782                         break;
1783                 case IWL_UCODE_TLV_BOOT:
1784                         pieces->boot = tlv_data;
1785                         pieces->boot_size = tlv_len;
1786                         break;
1787                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1788                         if (tlv_len != sizeof(u32))
1789                                 goto invalid_tlv_len;
1790                         capa->max_probe_length =
1791                                         le32_to_cpup((__le32 *)tlv_data);
1792                         break;
1793                 case IWL_UCODE_TLV_PAN:
1794                         if (tlv_len)
1795                                 goto invalid_tlv_len;
1796                         capa->pan = true;
1797                         break;
1798                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1799                         if (tlv_len != sizeof(u32))
1800                                 goto invalid_tlv_len;
1801                         pieces->init_evtlog_ptr =
1802                                         le32_to_cpup((__le32 *)tlv_data);
1803                         break;
1804                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1805                         if (tlv_len != sizeof(u32))
1806                                 goto invalid_tlv_len;
1807                         pieces->init_evtlog_size =
1808                                         le32_to_cpup((__le32 *)tlv_data);
1809                         break;
1810                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1811                         if (tlv_len != sizeof(u32))
1812                                 goto invalid_tlv_len;
1813                         pieces->init_errlog_ptr =
1814                                         le32_to_cpup((__le32 *)tlv_data);
1815                         break;
1816                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1817                         if (tlv_len != sizeof(u32))
1818                                 goto invalid_tlv_len;
1819                         pieces->inst_evtlog_ptr =
1820                                         le32_to_cpup((__le32 *)tlv_data);
1821                         break;
1822                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1823                         if (tlv_len != sizeof(u32))
1824                                 goto invalid_tlv_len;
1825                         pieces->inst_evtlog_size =
1826                                         le32_to_cpup((__le32 *)tlv_data);
1827                         break;
1828                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1829                         if (tlv_len != sizeof(u32))
1830                                 goto invalid_tlv_len;
1831                         pieces->inst_errlog_ptr =
1832                                         le32_to_cpup((__le32 *)tlv_data);
1833                         break;
1834                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1835                         if (tlv_len)
1836                                 goto invalid_tlv_len;
1837                         priv->enhance_sensitivity_table = true;
1838                         break;
1839                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1840                         if (tlv_len != sizeof(u32))
1841                                 goto invalid_tlv_len;
1842                         capa->standard_phy_calibration_size =
1843                                         le32_to_cpup((__le32 *)tlv_data);
1844                         break;
1845                 default:
1846                         IWL_WARN(priv, "unknown TLV: %d\n", tlv_type);
1847                         break;
1848                 }
1849         }
1850
1851         if (len) {
1852                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1853                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1854                 return -EINVAL;
1855         }
1856
1857         return 0;
1858
1859  invalid_tlv_len:
1860         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1861         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1862
1863         return -EINVAL;
1864 }
1865
1866 /**
1867  * iwl_ucode_callback - callback when firmware was loaded
1868  *
1869  * If loaded successfully, copies the firmware into buffers
1870  * for the card to fetch (via DMA).
1871  */
1872 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1873 {
1874         struct iwl_priv *priv = context;
1875         struct iwl_ucode_header *ucode;
1876         int err;
1877         struct iwlagn_firmware_pieces pieces;
1878         const unsigned int api_max = priv->cfg->ucode_api_max;
1879         const unsigned int api_min = priv->cfg->ucode_api_min;
1880         u32 api_ver;
1881         char buildstr[25];
1882         u32 build;
1883         struct iwlagn_ucode_capabilities ucode_capa = {
1884                 .max_probe_length = 200,
1885                 .standard_phy_calibration_size =
1886                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1887         };
1888
1889         memset(&pieces, 0, sizeof(pieces));
1890
1891         if (!ucode_raw) {
1892                 if (priv->fw_index <= priv->cfg->ucode_api_max)
1893                         IWL_ERR(priv,
1894                                 "request for firmware file '%s' failed.\n",
1895                                 priv->firmware_name);
1896                 goto try_again;
1897         }
1898
1899         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1900                        priv->firmware_name, ucode_raw->size);
1901
1902         /* Make sure that we got at least the API version number */
1903         if (ucode_raw->size < 4) {
1904                 IWL_ERR(priv, "File size way too small!\n");
1905                 goto try_again;
1906         }
1907
1908         /* Data from ucode file:  header followed by uCode images */
1909         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1910
1911         if (ucode->ver)
1912                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1913         else
1914                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1915                                            &ucode_capa);
1916
1917         if (err)
1918                 goto try_again;
1919
1920         api_ver = IWL_UCODE_API(priv->ucode_ver);
1921         build = pieces.build;
1922
1923         /*
1924          * api_ver should match the api version forming part of the
1925          * firmware filename ... but we don't check for that and only rely
1926          * on the API version read from firmware header from here on forward
1927          */
1928         /* no api version check required for experimental uCode */
1929         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1930                 if (api_ver < api_min || api_ver > api_max) {
1931                         IWL_ERR(priv,
1932                                 "Driver unable to support your firmware API. "
1933                                 "Driver supports v%u, firmware is v%u.\n",
1934                                 api_max, api_ver);
1935                         goto try_again;
1936                 }
1937
1938                 if (api_ver != api_max)
1939                         IWL_ERR(priv,
1940                                 "Firmware has old API version. Expected v%u, "
1941                                 "got v%u. New firmware can be obtained "
1942                                 "from http://www.intellinuxwireless.org.\n",
1943                                 api_max, api_ver);
1944         }
1945
1946         if (build)
1947                 sprintf(buildstr, " build %u%s", build,
1948                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1949                                 ? " (EXP)" : "");
1950         else
1951                 buildstr[0] = '\0';
1952
1953         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1954                  IWL_UCODE_MAJOR(priv->ucode_ver),
1955                  IWL_UCODE_MINOR(priv->ucode_ver),
1956                  IWL_UCODE_API(priv->ucode_ver),
1957                  IWL_UCODE_SERIAL(priv->ucode_ver),
1958                  buildstr);
1959
1960         snprintf(priv->hw->wiphy->fw_version,
1961                  sizeof(priv->hw->wiphy->fw_version),
1962                  "%u.%u.%u.%u%s",
1963                  IWL_UCODE_MAJOR(priv->ucode_ver),
1964                  IWL_UCODE_MINOR(priv->ucode_ver),
1965                  IWL_UCODE_API(priv->ucode_ver),
1966                  IWL_UCODE_SERIAL(priv->ucode_ver),
1967                  buildstr);
1968
1969         /*
1970          * For any of the failures below (before allocating pci memory)
1971          * we will try to load a version with a smaller API -- maybe the
1972          * user just got a corrupted version of the latest API.
1973          */
1974
1975         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1976                        priv->ucode_ver);
1977         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1978                        pieces.inst_size);
1979         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1980                        pieces.data_size);
1981         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1982                        pieces.init_size);
1983         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1984                        pieces.init_data_size);
1985         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %Zd\n",
1986                        pieces.boot_size);
1987
1988         /* Verify that uCode images will fit in card's SRAM */
1989         if (pieces.inst_size > priv->hw_params.max_inst_size) {
1990                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1991                         pieces.inst_size);
1992                 goto try_again;
1993         }
1994
1995         if (pieces.data_size > priv->hw_params.max_data_size) {
1996                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1997                         pieces.data_size);
1998                 goto try_again;
1999         }
2000
2001         if (pieces.init_size > priv->hw_params.max_inst_size) {
2002                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
2003                         pieces.init_size);
2004                 goto try_again;
2005         }
2006
2007         if (pieces.init_data_size > priv->hw_params.max_data_size) {
2008                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
2009                         pieces.init_data_size);
2010                 goto try_again;
2011         }
2012
2013         if (pieces.boot_size > priv->hw_params.max_bsm_size) {
2014                 IWL_ERR(priv, "uCode boot instr len %Zd too large to fit in\n",
2015                         pieces.boot_size);
2016                 goto try_again;
2017         }
2018
2019         /* Allocate ucode buffers for card's bus-master loading ... */
2020
2021         /* Runtime instructions and 2 copies of data:
2022          * 1) unmodified from disk
2023          * 2) backup cache for save/restore during power-downs */
2024         priv->ucode_code.len = pieces.inst_size;
2025         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2026
2027         priv->ucode_data.len = pieces.data_size;
2028         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2029
2030         priv->ucode_data_backup.len = pieces.data_size;
2031         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2032
2033         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2034             !priv->ucode_data_backup.v_addr)
2035                 goto err_pci_alloc;
2036
2037         /* Initialization instructions and data */
2038         if (pieces.init_size && pieces.init_data_size) {
2039                 priv->ucode_init.len = pieces.init_size;
2040                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2041
2042                 priv->ucode_init_data.len = pieces.init_data_size;
2043                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2044
2045                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2046                         goto err_pci_alloc;
2047         }
2048
2049         /* Bootstrap (instructions only, no data) */
2050         if (pieces.boot_size) {
2051                 priv->ucode_boot.len = pieces.boot_size;
2052                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2053
2054                 if (!priv->ucode_boot.v_addr)
2055                         goto err_pci_alloc;
2056         }
2057
2058         /* Now that we can no longer fail, copy information */
2059
2060         /*
2061          * The (size - 16) / 12 formula is based on the information recorded
2062          * for each event, which is of mode 1 (including timestamp) for all
2063          * new microcodes that include this information.
2064          */
2065         priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
2066         if (pieces.init_evtlog_size)
2067                 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
2068         else
2069                 priv->_agn.init_evtlog_size =
2070                         priv->cfg->base_params->max_event_log_size;
2071         priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
2072         priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
2073         if (pieces.inst_evtlog_size)
2074                 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
2075         else
2076                 priv->_agn.inst_evtlog_size =
2077                         priv->cfg->base_params->max_event_log_size;
2078         priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
2079
2080         if (ucode_capa.pan) {
2081                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
2082                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
2083         } else
2084                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
2085
2086         /* Copy images into buffers for card's bus-master reads ... */
2087
2088         /* Runtime instructions (first block of data in file) */
2089         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n",
2090                         pieces.inst_size);
2091         memcpy(priv->ucode_code.v_addr, pieces.inst, pieces.inst_size);
2092
2093         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2094                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2095
2096         /*
2097          * Runtime data
2098          * NOTE:  Copy into backup buffer will be done in iwl_up()
2099          */
2100         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n",
2101                         pieces.data_size);
2102         memcpy(priv->ucode_data.v_addr, pieces.data, pieces.data_size);
2103         memcpy(priv->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
2104
2105         /* Initialization instructions */
2106         if (pieces.init_size) {
2107                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
2108                                 pieces.init_size);
2109                 memcpy(priv->ucode_init.v_addr, pieces.init, pieces.init_size);
2110         }
2111
2112         /* Initialization data */
2113         if (pieces.init_data_size) {
2114                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
2115                                pieces.init_data_size);
2116                 memcpy(priv->ucode_init_data.v_addr, pieces.init_data,
2117                        pieces.init_data_size);
2118         }
2119
2120         /* Bootstrap instructions */
2121         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n",
2122                         pieces.boot_size);
2123         memcpy(priv->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
2124
2125         /*
2126          * figure out the offset of chain noise reset and gain commands
2127          * base on the size of standard phy calibration commands table size
2128          */
2129         if (ucode_capa.standard_phy_calibration_size >
2130             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
2131                 ucode_capa.standard_phy_calibration_size =
2132                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
2133
2134         priv->_agn.phy_calib_chain_noise_reset_cmd =
2135                 ucode_capa.standard_phy_calibration_size;
2136         priv->_agn.phy_calib_chain_noise_gain_cmd =
2137                 ucode_capa.standard_phy_calibration_size + 1;
2138
2139         /**************************************************
2140          * This is still part of probe() in a sense...
2141          *
2142          * 9. Setup and register with mac80211 and debugfs
2143          **************************************************/
2144         err = iwl_mac_setup_register(priv, &ucode_capa);
2145         if (err)
2146                 goto out_unbind;
2147
2148         err = iwl_dbgfs_register(priv, DRV_NAME);
2149         if (err)
2150                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
2151
2152         err = sysfs_create_group(&priv->pci_dev->dev.kobj,
2153                                         &iwl_attribute_group);
2154         if (err) {
2155                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
2156                 goto out_unbind;
2157         }
2158
2159         /* We have our copies now, allow OS release its copies */
2160         release_firmware(ucode_raw);
2161         complete(&priv->_agn.firmware_loading_complete);
2162         return;
2163
2164  try_again:
2165         /* try next, if any */
2166         if (iwl_request_firmware(priv, false))
2167                 goto out_unbind;
2168         release_firmware(ucode_raw);
2169         return;
2170
2171  err_pci_alloc:
2172         IWL_ERR(priv, "failed to allocate pci memory\n");
2173         iwl_dealloc_ucode_pci(priv);
2174  out_unbind:
2175         complete(&priv->_agn.firmware_loading_complete);
2176         device_release_driver(&priv->pci_dev->dev);
2177         release_firmware(ucode_raw);
2178 }
2179
2180 static const char *desc_lookup_text[] = {
2181         "OK",
2182         "FAIL",
2183         "BAD_PARAM",
2184         "BAD_CHECKSUM",
2185         "NMI_INTERRUPT_WDG",
2186         "SYSASSERT",
2187         "FATAL_ERROR",
2188         "BAD_COMMAND",
2189         "HW_ERROR_TUNE_LOCK",
2190         "HW_ERROR_TEMPERATURE",
2191         "ILLEGAL_CHAN_FREQ",
2192         "VCC_NOT_STABLE",
2193         "FH_ERROR",
2194         "NMI_INTERRUPT_HOST",
2195         "NMI_INTERRUPT_ACTION_PT",
2196         "NMI_INTERRUPT_UNKNOWN",
2197         "UCODE_VERSION_MISMATCH",
2198         "HW_ERROR_ABS_LOCK",
2199         "HW_ERROR_CAL_LOCK_FAIL",
2200         "NMI_INTERRUPT_INST_ACTION_PT",
2201         "NMI_INTERRUPT_DATA_ACTION_PT",
2202         "NMI_TRM_HW_ER",
2203         "NMI_INTERRUPT_TRM",
2204         "NMI_INTERRUPT_BREAK_POINT"
2205         "DEBUG_0",
2206         "DEBUG_1",
2207         "DEBUG_2",
2208         "DEBUG_3",
2209 };
2210
2211 static struct { char *name; u8 num; } advanced_lookup[] = {
2212         { "NMI_INTERRUPT_WDG", 0x34 },
2213         { "SYSASSERT", 0x35 },
2214         { "UCODE_VERSION_MISMATCH", 0x37 },
2215         { "BAD_COMMAND", 0x38 },
2216         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
2217         { "FATAL_ERROR", 0x3D },
2218         { "NMI_TRM_HW_ERR", 0x46 },
2219         { "NMI_INTERRUPT_TRM", 0x4C },
2220         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
2221         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
2222         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
2223         { "NMI_INTERRUPT_HOST", 0x66 },
2224         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
2225         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
2226         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
2227         { "ADVANCED_SYSASSERT", 0 },
2228 };
2229
2230 static const char *desc_lookup(u32 num)
2231 {
2232         int i;
2233         int max = ARRAY_SIZE(desc_lookup_text);
2234
2235         if (num < max)
2236                 return desc_lookup_text[num];
2237
2238         max = ARRAY_SIZE(advanced_lookup) - 1;
2239         for (i = 0; i < max; i++) {
2240                 if (advanced_lookup[i].num == num)
2241                         break;;
2242         }
2243         return advanced_lookup[i].name;
2244 }
2245
2246 #define ERROR_START_OFFSET  (1 * sizeof(u32))
2247 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
2248
2249 void iwl_dump_nic_error_log(struct iwl_priv *priv)
2250 {
2251         u32 data2, line;
2252         u32 desc, time, count, base, data1;
2253         u32 blink1, blink2, ilink1, ilink2;
2254         u32 pc, hcmd;
2255
2256         if (priv->ucode_type == UCODE_INIT) {
2257                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
2258                 if (!base)
2259                         base = priv->_agn.init_errlog_ptr;
2260         } else {
2261                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
2262                 if (!base)
2263                         base = priv->_agn.inst_errlog_ptr;
2264         }
2265
2266         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2267                 IWL_ERR(priv,
2268                         "Not valid error log pointer 0x%08X for %s uCode\n",
2269                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
2270                 return;
2271         }
2272
2273         count = iwl_read_targ_mem(priv, base);
2274
2275         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
2276                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
2277                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
2278                         priv->status, count);
2279         }
2280
2281         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
2282         priv->isr_stats.err_code = desc;
2283         pc = iwl_read_targ_mem(priv, base + 2 * sizeof(u32));
2284         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
2285         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
2286         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
2287         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
2288         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
2289         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
2290         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
2291         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
2292         hcmd = iwl_read_targ_mem(priv, base + 22 * sizeof(u32));
2293
2294         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
2295                                       blink1, blink2, ilink1, ilink2);
2296
2297         IWL_ERR(priv, "Desc                                  Time       "
2298                 "data1      data2      line\n");
2299         IWL_ERR(priv, "%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
2300                 desc_lookup(desc), desc, time, data1, data2, line);
2301         IWL_ERR(priv, "pc      blink1  blink2  ilink1  ilink2  hcmd\n");
2302         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n",
2303                 pc, blink1, blink2, ilink1, ilink2, hcmd);
2304 }
2305
2306 #define EVENT_START_OFFSET  (4 * sizeof(u32))
2307
2308 /**
2309  * iwl_print_event_log - Dump error event log to syslog
2310  *
2311  */
2312 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
2313                                u32 num_events, u32 mode,
2314                                int pos, char **buf, size_t bufsz)
2315 {
2316         u32 i;
2317         u32 base;       /* SRAM byte address of event log header */
2318         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
2319         u32 ptr;        /* SRAM byte address of log data */
2320         u32 ev, time, data; /* event log data */
2321         unsigned long reg_flags;
2322
2323         if (num_events == 0)
2324                 return pos;
2325
2326         if (priv->ucode_type == UCODE_INIT) {
2327                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
2328                 if (!base)
2329                         base = priv->_agn.init_evtlog_ptr;
2330         } else {
2331                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2332                 if (!base)
2333                         base = priv->_agn.inst_evtlog_ptr;
2334         }
2335
2336         if (mode == 0)
2337                 event_size = 2 * sizeof(u32);
2338         else
2339                 event_size = 3 * sizeof(u32);
2340
2341         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
2342
2343         /* Make sure device is powered up for SRAM reads */
2344         spin_lock_irqsave(&priv->reg_lock, reg_flags);
2345         iwl_grab_nic_access(priv);
2346
2347         /* Set starting address; reads will auto-increment */
2348         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
2349         rmb();
2350
2351         /* "time" is actually "data" for mode 0 (no timestamp).
2352         * place event id # at far right for easier visual parsing. */
2353         for (i = 0; i < num_events; i++) {
2354                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2355                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2356                 if (mode == 0) {
2357                         /* data, ev */
2358                         if (bufsz) {
2359                                 pos += scnprintf(*buf + pos, bufsz - pos,
2360                                                 "EVT_LOG:0x%08x:%04u\n",
2361                                                 time, ev);
2362                         } else {
2363                                 trace_iwlwifi_dev_ucode_event(priv, 0,
2364                                         time, ev);
2365                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
2366                                         time, ev);
2367                         }
2368                 } else {
2369                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2370                         if (bufsz) {
2371                                 pos += scnprintf(*buf + pos, bufsz - pos,
2372                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
2373                                                  time, data, ev);
2374                         } else {
2375                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
2376                                         time, data, ev);
2377                                 trace_iwlwifi_dev_ucode_event(priv, time,
2378                                         data, ev);
2379                         }
2380                 }
2381         }
2382
2383         /* Allow device to power down */
2384         iwl_release_nic_access(priv);
2385         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
2386         return pos;
2387 }
2388
2389 /**
2390  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
2391  */
2392 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
2393                                     u32 num_wraps, u32 next_entry,
2394                                     u32 size, u32 mode,
2395                                     int pos, char **buf, size_t bufsz)
2396 {
2397         /*
2398          * display the newest DEFAULT_LOG_ENTRIES entries
2399          * i.e the entries just before the next ont that uCode would fill.
2400          */
2401         if (num_wraps) {
2402                 if (next_entry < size) {
2403                         pos = iwl_print_event_log(priv,
2404                                                 capacity - (size - next_entry),
2405                                                 size - next_entry, mode,
2406                                                 pos, buf, bufsz);
2407                         pos = iwl_print_event_log(priv, 0,
2408                                                   next_entry, mode,
2409                                                   pos, buf, bufsz);
2410                 } else
2411                         pos = iwl_print_event_log(priv, next_entry - size,
2412                                                   size, mode, pos, buf, bufsz);
2413         } else {
2414                 if (next_entry < size) {
2415                         pos = iwl_print_event_log(priv, 0, next_entry,
2416                                                   mode, pos, buf, bufsz);
2417                 } else {
2418                         pos = iwl_print_event_log(priv, next_entry - size,
2419                                                   size, mode, pos, buf, bufsz);
2420                 }
2421         }
2422         return pos;
2423 }
2424
2425 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
2426
2427 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
2428                             char **buf, bool display)
2429 {
2430         u32 base;       /* SRAM byte address of event log header */
2431         u32 capacity;   /* event log capacity in # entries */
2432         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
2433         u32 num_wraps;  /* # times uCode wrapped to top of log */
2434         u32 next_entry; /* index of next entry to be written by uCode */
2435         u32 size;       /* # entries that we'll print */
2436         u32 logsize;
2437         int pos = 0;
2438         size_t bufsz = 0;
2439
2440         if (priv->ucode_type == UCODE_INIT) {
2441                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
2442                 logsize = priv->_agn.init_evtlog_size;
2443                 if (!base)
2444                         base = priv->_agn.init_evtlog_ptr;
2445         } else {
2446                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2447                 logsize = priv->_agn.inst_evtlog_size;
2448                 if (!base)
2449                         base = priv->_agn.inst_evtlog_ptr;
2450         }
2451
2452         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2453                 IWL_ERR(priv,
2454                         "Invalid event log pointer 0x%08X for %s uCode\n",
2455                         base, (priv->ucode_type == UCODE_INIT) ? "Init" : "RT");
2456                 return -EINVAL;
2457         }
2458
2459         /* event log header */
2460         capacity = iwl_read_targ_mem(priv, base);
2461         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
2462         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
2463         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
2464
2465         if (capacity > logsize) {
2466                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
2467                         capacity, logsize);
2468                 capacity = logsize;
2469         }
2470
2471         if (next_entry > logsize) {
2472                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
2473                         next_entry, logsize);
2474                 next_entry = logsize;
2475         }
2476
2477         size = num_wraps ? capacity : next_entry;
2478
2479         /* bail out if nothing in log */
2480         if (size == 0) {
2481                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2482                 return pos;
2483         }
2484
2485         /* enable/disable bt channel inhibition */
2486         priv->bt_ch_announce = iwlagn_bt_ch_announce;
2487
2488 #ifdef CONFIG_IWLWIFI_DEBUG
2489         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
2490                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2491                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2492 #else
2493         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
2494                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
2495 #endif
2496         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
2497                 size);
2498
2499 #ifdef CONFIG_IWLWIFI_DEBUG
2500         if (display) {
2501                 if (full_log)
2502                         bufsz = capacity * 48;
2503                 else
2504                         bufsz = size * 48;
2505                 *buf = kmalloc(bufsz, GFP_KERNEL);
2506                 if (!*buf)
2507                         return -ENOMEM;
2508         }
2509         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
2510                 /*
2511                  * if uCode has wrapped back to top of log,
2512                  * start at the oldest entry,
2513                  * i.e the next one that uCode would fill.
2514                  */
2515                 if (num_wraps)
2516                         pos = iwl_print_event_log(priv, next_entry,
2517                                                 capacity - next_entry, mode,
2518                                                 pos, buf, bufsz);
2519                 /* (then/else) start at top of log */
2520                 pos = iwl_print_event_log(priv, 0,
2521                                           next_entry, mode, pos, buf, bufsz);
2522         } else
2523                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2524                                                 next_entry, size, mode,
2525                                                 pos, buf, bufsz);
2526 #else
2527         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
2528                                         next_entry, size, mode,
2529                                         pos, buf, bufsz);
2530 #endif
2531         return pos;
2532 }
2533
2534 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2535 {
2536         struct iwl_ct_kill_config cmd;
2537         struct iwl_ct_kill_throttling_config adv_cmd;
2538         unsigned long flags;
2539         int ret = 0;
2540
2541         spin_lock_irqsave(&priv->lock, flags);
2542         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2543                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2544         spin_unlock_irqrestore(&priv->lock, flags);
2545         priv->thermal_throttle.ct_kill_toggle = false;
2546
2547         if (priv->cfg->base_params->support_ct_kill_exit) {
2548                 adv_cmd.critical_temperature_enter =
2549                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2550                 adv_cmd.critical_temperature_exit =
2551                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2552
2553                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2554                                        sizeof(adv_cmd), &adv_cmd);
2555                 if (ret)
2556                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2557                 else
2558                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2559                                         "succeeded, "
2560                                         "critical temperature enter is %d,"
2561                                         "exit is %d\n",
2562                                        priv->hw_params.ct_kill_threshold,
2563                                        priv->hw_params.ct_kill_exit_threshold);
2564         } else {
2565                 cmd.critical_temperature_R =
2566                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2567
2568                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2569                                        sizeof(cmd), &cmd);
2570                 if (ret)
2571                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2572                 else
2573                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2574                                         "succeeded, "
2575                                         "critical temperature is %d\n",
2576                                         priv->hw_params.ct_kill_threshold);
2577         }
2578 }
2579
2580 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
2581 {
2582         struct iwl_calib_cfg_cmd calib_cfg_cmd;
2583         struct iwl_host_cmd cmd = {
2584                 .id = CALIBRATION_CFG_CMD,
2585                 .len = sizeof(struct iwl_calib_cfg_cmd),
2586                 .data = &calib_cfg_cmd,
2587         };
2588
2589         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
2590         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
2591         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
2592
2593         return iwl_send_cmd(priv, &cmd);
2594 }
2595
2596
2597 /**
2598  * iwl_alive_start - called after REPLY_ALIVE notification received
2599  *                   from protocol/runtime uCode (initialization uCode's
2600  *                   Alive gets handled by iwl_init_alive_start()).
2601  */
2602 static void iwl_alive_start(struct iwl_priv *priv)
2603 {
2604         int ret = 0;
2605         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2606
2607         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2608
2609         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2610          * This is a paranoid check, because we would not have gotten the
2611          * "runtime" alive if code weren't properly loaded.  */
2612         if (iwl_verify_ucode(priv)) {
2613                 /* Runtime instruction load was bad;
2614                  * take it all the way back down so we can try again */
2615                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2616                 goto restart;
2617         }
2618
2619         ret = priv->cfg->ops->lib->alive_notify(priv);
2620         if (ret) {
2621                 IWL_WARN(priv,
2622                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
2623                 goto restart;
2624         }
2625
2626
2627         /* After the ALIVE response, we can send host commands to the uCode */
2628         set_bit(STATUS_ALIVE, &priv->status);
2629
2630         /* Enable watchdog to monitor the driver tx queues */
2631         iwl_setup_watchdog(priv);
2632
2633         if (iwl_is_rfkill(priv))
2634                 return;
2635
2636         /* download priority table before any calibration request */
2637         if (priv->cfg->bt_params &&
2638             priv->cfg->bt_params->advanced_bt_coexist) {
2639                 /* Configure Bluetooth device coexistence support */
2640                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2641                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2642                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2643                 priv->cfg->ops->hcmd->send_bt_config(priv);
2644                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2645                 iwlagn_send_prio_tbl(priv);
2646
2647                 /* FIXME: w/a to force change uCode BT state machine */
2648                 iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2649                         BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2650                 iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2651                         BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2652         }
2653         if (priv->hw_params.calib_rt_cfg)
2654                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2655
2656         ieee80211_wake_queues(priv->hw);
2657
2658         priv->active_rate = IWL_RATES_MASK;
2659
2660         /* Configure Tx antenna selection based on H/W config */
2661         if (priv->cfg->ops->hcmd->set_tx_ant)
2662                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2663
2664         if (iwl_is_associated_ctx(ctx)) {
2665                 struct iwl_rxon_cmd *active_rxon =
2666                                 (struct iwl_rxon_cmd *)&ctx->active;
2667                 /* apply any changes in staging */
2668                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2669                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2670         } else {
2671                 struct iwl_rxon_context *tmp;
2672                 /* Initialize our rx_config data */
2673                 for_each_context(priv, tmp)
2674                         iwl_connection_init_rx_config(priv, tmp);
2675
2676                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2677                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2678         }
2679
2680         if (!priv->cfg->bt_params || (priv->cfg->bt_params &&
2681             !priv->cfg->bt_params->advanced_bt_coexist)) {
2682                 /*
2683                  * default is 2-wire BT coexexistence support
2684                  */
2685                 priv->cfg->ops->hcmd->send_bt_config(priv);
2686         }
2687
2688         iwl_reset_run_time_calib(priv);
2689
2690         set_bit(STATUS_READY, &priv->status);
2691
2692         /* Configure the adapter for unassociated operation */
2693         iwlcore_commit_rxon(priv, ctx);
2694
2695         /* At this point, the NIC is initialized and operational */
2696         iwl_rf_kill_ct_config(priv);
2697
2698         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2699         wake_up_interruptible(&priv->wait_command_queue);
2700
2701         iwl_power_update_mode(priv, true);
2702         IWL_DEBUG_INFO(priv, "Updated power mode\n");
2703
2704
2705         return;
2706
2707  restart:
2708         queue_work(priv->workqueue, &priv->restart);
2709 }
2710
2711 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2712
2713 static void __iwl_down(struct iwl_priv *priv)
2714 {
2715         unsigned long flags;
2716         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2717
2718         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2719
2720         iwl_scan_cancel_timeout(priv, 200);
2721
2722         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2723
2724         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2725          * to prevent rearm timer */
2726         del_timer_sync(&priv->watchdog);
2727
2728         iwl_clear_ucode_stations(priv, NULL);
2729         iwl_dealloc_bcast_stations(priv);
2730         iwl_clear_driver_stations(priv);
2731
2732         /* reset BT coex data */
2733         priv->bt_status = 0;
2734         if (priv->cfg->bt_params)
2735                 priv->bt_traffic_load =
2736                          priv->cfg->bt_params->bt_init_traffic_load;
2737         else
2738                 priv->bt_traffic_load = 0;
2739         priv->bt_full_concurrent = false;
2740         priv->bt_ci_compliance = 0;
2741
2742         /* Unblock any waiting calls */
2743         wake_up_interruptible_all(&priv->wait_command_queue);
2744
2745         /* Wipe out the EXIT_PENDING status bit if we are not actually
2746          * exiting the module */
2747         if (!exit_pending)
2748                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2749
2750         /* stop and reset the on-board processor */
2751         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2752
2753         /* tell the device to stop sending interrupts */
2754         spin_lock_irqsave(&priv->lock, flags);
2755         iwl_disable_interrupts(priv);
2756         spin_unlock_irqrestore(&priv->lock, flags);
2757         iwl_synchronize_irq(priv);
2758
2759         if (priv->mac80211_registered)
2760                 ieee80211_stop_queues(priv->hw);
2761
2762         /* If we have not previously called iwl_init() then
2763          * clear all bits but the RF Kill bit and return */
2764         if (!iwl_is_init(priv)) {
2765                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2766                                         STATUS_RF_KILL_HW |
2767                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2768                                         STATUS_GEO_CONFIGURED |
2769                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2770                                         STATUS_EXIT_PENDING;
2771                 goto exit;
2772         }
2773
2774         /* ...otherwise clear out all the status bits but the RF Kill
2775          * bit and continue taking the NIC down. */
2776         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2777                                 STATUS_RF_KILL_HW |
2778                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2779                                 STATUS_GEO_CONFIGURED |
2780                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2781                                 STATUS_FW_ERROR |
2782                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2783                                 STATUS_EXIT_PENDING;
2784
2785         /* device going down, Stop using ICT table */
2786         if (priv->cfg->ops->lib->isr_ops.disable)
2787                 priv->cfg->ops->lib->isr_ops.disable(priv);
2788
2789         iwlagn_txq_ctx_stop(priv);
2790         iwlagn_rxq_stop(priv);
2791
2792         /* Power-down device's busmaster DMA clocks */
2793         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2794         udelay(5);
2795
2796         /* Make sure (redundant) we've released our request to stay awake */
2797         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2798
2799         /* Stop the device, and put it in low power state */
2800         iwl_apm_stop(priv);
2801
2802  exit:
2803         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2804
2805         dev_kfree_skb(priv->beacon_skb);
2806         priv->beacon_skb = NULL;
2807
2808         /* clear out any free frames */
2809         iwl_clear_free_frames(priv);
2810 }
2811
2812 static void iwl_down(struct iwl_priv *priv)
2813 {
2814         mutex_lock(&priv->mutex);
2815         __iwl_down(priv);
2816         mutex_unlock(&priv->mutex);
2817
2818         iwl_cancel_deferred_work(priv);
2819 }
2820
2821 #define HW_READY_TIMEOUT (50)
2822
2823 static int iwl_set_hw_ready(struct iwl_priv *priv)
2824 {
2825         int ret = 0;
2826
2827         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2828                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2829
2830         /* See if we got it */
2831         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2832                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2833                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2834                                 HW_READY_TIMEOUT);
2835         if (ret != -ETIMEDOUT)
2836                 priv->hw_ready = true;
2837         else
2838                 priv->hw_ready = false;
2839
2840         IWL_DEBUG_INFO(priv, "hardware %s\n",
2841                       (priv->hw_ready == 1) ? "ready" : "not ready");
2842         return ret;
2843 }
2844
2845 static int iwl_prepare_card_hw(struct iwl_priv *priv)
2846 {
2847         int ret = 0;
2848
2849         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2850
2851         ret = iwl_set_hw_ready(priv);
2852         if (priv->hw_ready)
2853                 return ret;
2854
2855         /* If HW is not ready, prepare the conditions to check again */
2856         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2857                         CSR_HW_IF_CONFIG_REG_PREPARE);
2858
2859         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2860                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2861                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2862
2863         /* HW should be ready by now, check again. */
2864         if (ret != -ETIMEDOUT)
2865                 iwl_set_hw_ready(priv);
2866
2867         return ret;
2868 }
2869
2870 #define MAX_HW_RESTARTS 5
2871
2872 static int __iwl_up(struct iwl_priv *priv)
2873 {
2874         struct iwl_rxon_context *ctx;
2875         int i;
2876         int ret;
2877
2878         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2879                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2880                 return -EIO;
2881         }
2882
2883         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2884                 IWL_ERR(priv, "ucode not available for device bringup\n");
2885                 return -EIO;
2886         }
2887
2888         for_each_context(priv, ctx) {
2889                 ret = iwlagn_alloc_bcast_station(priv, ctx);
2890                 if (ret) {
2891                         iwl_dealloc_bcast_stations(priv);
2892                         return ret;
2893                 }
2894         }
2895
2896         iwl_prepare_card_hw(priv);
2897
2898         if (!priv->hw_ready) {
2899                 IWL_WARN(priv, "Exit HW not ready\n");
2900                 return -EIO;
2901         }
2902
2903         /* If platform's RF_KILL switch is NOT set to KILL */
2904         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2905                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2906         else
2907                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2908
2909         if (iwl_is_rfkill(priv)) {
2910                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
2911
2912                 iwl_enable_interrupts(priv);
2913                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2914                 return 0;
2915         }
2916
2917         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2918
2919         /* must be initialised before iwl_hw_nic_init */
2920         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
2921                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
2922         else
2923                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
2924
2925         ret = iwlagn_hw_nic_init(priv);
2926         if (ret) {
2927                 IWL_ERR(priv, "Unable to init nic\n");
2928                 return ret;
2929         }
2930
2931         /* make sure rfkill handshake bits are cleared */
2932         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2933         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2934                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2935
2936         /* clear (again), then enable host interrupts */
2937         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2938         iwl_enable_interrupts(priv);
2939
2940         /* really make sure rfkill handshake bits are cleared */
2941         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2942         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2943
2944         /* Copy origina