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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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/slab.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/delay.h>
  38 #include <linux/sched.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/wireless.h>
  42 #include <linux/firmware.h>
  43 #include <linux/etherdevice.h>
  44 #include <linux/if_arp.h>
  45
  46 #include <net/mac80211.h>
  47
  48 #include <asm/div64.h>
  49
  50 #include "iwl-eeprom.h"
  51 #include "iwl-dev.h"
  52 #include "iwl-core.h"
  53 #include "iwl-io.h"
  54 #include "iwl-helpers.h"
  55 #include "iwl-sta.h"
  56 #include "iwl-agn-calib.h"
  57 #include "iwl-agn.h"
  58 #include "iwl-pci.h"
  59
  60
  61 /******************************************************************************
  62  *
  63  * module boiler plate
  64  *
  65  ******************************************************************************/
  66
  67 /*
  68  * module name, copyright, version, etc.
  69  */
  70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 #define DRV_VERSION     IWLWIFI_VERSION VD
  79
  80
  81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  82 MODULE_VERSION(DRV_VERSION);
  83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  84 MODULE_LICENSE("GPL");
  85
  86 static int iwlagn_ant_coupling;
  87 static bool iwlagn_bt_ch_announce = 1;
  88
  89 void iwl_update_chain_flags(struct iwl_priv *priv)
  90 {
  91         struct iwl_rxon_context *ctx;
  92
  93         if (priv->cfg->ops->hcmd->set_rxon_chain) {
  94                 for_each_context(priv, ctx) {
  95                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
  96                         if (ctx->active.rx_chain != ctx->staging.rx_chain)
  97                                 iwlagn_commit_rxon(priv, ctx);
  98                 }
  99         }
 100 }
 101
 102 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 103 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 104                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 105                                u8 *beacon, u32 frame_size)
 106 {
 107         u16 tim_idx;
 108         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 109
 110         /*
 111          * The index is relative to frame start but we start looking at the
 112          * variable-length part of the beacon.
 113          */
 114         tim_idx = mgmt->u.beacon.variable - beacon;
 115
 116         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 117         while ((tim_idx < (frame_size - 2)) &&
 118                         (beacon[tim_idx] != WLAN_EID_TIM))
 119                 tim_idx += beacon[tim_idx+1] + 2;
 120
 121         /* If TIM field was found, set variables */
 122         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 123                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 124                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 125         } else
 126                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 127 }
 128
 129 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 130 {
 131         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 132         struct iwl_host_cmd cmd = {
 133                 .id = REPLY_TX_BEACON,
 134         };
 135         struct ieee80211_tx_info *info;
 136         u32 frame_size;
 137         u32 rate_flags;
 138         u32 rate;
 139
 140         /*
 141          * We have to set up the TX command, the TX Beacon command, and the
 142          * beacon contents.
 143          */
 144
 145         lockdep_assert_held(&priv->mutex);
 146
 147         if (!priv->beacon_ctx) {
 148                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 149                 return 0;
 150         }
 151
 152         if (WARN_ON(!priv->beacon_skb))
 153                 return -EINVAL;
 154
 155         /* Allocate beacon command */
 156         if (!priv->beacon_cmd)
 157                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 158         tx_beacon_cmd = priv->beacon_cmd;
 159         if (!tx_beacon_cmd)
 160                 return -ENOMEM;
 161
 162         frame_size = priv->beacon_skb->len;
 163
 164         /* Set up TX command fields */
 165         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 166         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 167         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 168         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 169                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 170
 171         /* Set up TX beacon command fields */
 172         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 173                            frame_size);
 174
 175         /* Set up packet rate and flags */
 176         info = IEEE80211_SKB_CB(priv->beacon_skb);
 177
 178         /*
 179          * Let's set up the rate at least somewhat correctly;
 180          * it will currently not actually be used by the uCode,
 181          * it uses the broadcast station's rate instead.
 182          */
 183         if (info->control.rates[0].idx < 0 ||
 184             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 185                 rate = 0;
 186         else
 187                 rate = info->control.rates[0].idx;
 188
 189         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 190                                               priv->hw_params.valid_tx_ant);
 191         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 192
 193         /* In mac80211, rates for 5 GHz start at 0 */
 194         if (info->band == IEEE80211_BAND_5GHZ)
 195                 rate += IWL_FIRST_OFDM_RATE;
 196         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 197                 rate_flags |= RATE_MCS_CCK_MSK;
 198
 199         tx_beacon_cmd->tx.rate_n_flags =
 200                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 201
 202         /* Submit command */
 203         cmd.len[0] = sizeof(*tx_beacon_cmd);
 204         cmd.data[0] = tx_beacon_cmd;
 205         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 206         cmd.len[1] = frame_size;
 207         cmd.data[1] = priv->beacon_skb->data;
 208         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 209
 210         return iwl_send_cmd_sync(priv, &cmd);
 211 }
 212
 213 static void iwl_bg_beacon_update(struct work_struct *work)
 214 {
 215         struct iwl_priv *priv =
 216                 container_of(work, struct iwl_priv, beacon_update);
 217         struct sk_buff *beacon;
 218
 219         mutex_lock(&priv->mutex);
 220         if (!priv->beacon_ctx) {
 221                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 222                 goto out;
 223         }
 224
 225         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 226                 /*
 227                  * The ucode will send beacon notifications even in
 228                  * IBSS mode, but we don't want to process them. But
 229                  * we need to defer the type check to here due to
 230                  * requiring locking around the beacon_ctx access.
 231                  */
 232                 goto out;
 233         }
 234
 235         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 236         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 237         if (!beacon) {
 238                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 239                 goto out;
 240         }
 241
 242         /* new beacon skb is allocated every time; dispose previous.*/
 243         dev_kfree_skb(priv->beacon_skb);
 244
 245         priv->beacon_skb = beacon;
 246
 247         iwlagn_send_beacon_cmd(priv);
 248  out:
 249         mutex_unlock(&priv->mutex);
 250 }
 251
 252 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 253 {
 254         struct iwl_priv *priv =
 255                 container_of(work, struct iwl_priv, bt_runtime_config);
 256
 257         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 258                 return;
 259
 260         /* dont send host command if rf-kill is on */
 261         if (!iwl_is_ready_rf(priv))
 262                 return;
 263         priv->cfg->ops->hcmd->send_bt_config(priv);
 264 }
 265
 266 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 267 {
 268         struct iwl_priv *priv =
 269                 container_of(work, struct iwl_priv, bt_full_concurrency);
 270         struct iwl_rxon_context *ctx;
 271
 272         mutex_lock(&priv->mutex);
 273
 274         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 275                 goto out;
 276
 277         /* dont send host command if rf-kill is on */
 278         if (!iwl_is_ready_rf(priv))
 279                 goto out;
 280
 281         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 282                        priv->bt_full_concurrent ?
 283                        "full concurrency" : "3-wire");
 284
 285         /*
 286          * LQ & RXON updated cmds must be sent before BT Config cmd
 287          * to avoid 3-wire collisions
 288          */
 289         for_each_context(priv, ctx) {
 290                 if (priv->cfg->ops->hcmd->set_rxon_chain)
 291                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 292                 iwlagn_commit_rxon(priv, ctx);
 293         }
 294
 295         priv->cfg->ops->hcmd->send_bt_config(priv);
 296 out:
 297         mutex_unlock(&priv->mutex);
 298 }
 299
 300 /**
 301  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 302  *
 303  * This callback is provided in order to send a statistics request.
 304  *
 305  * This timer function is continually reset to execute within
 306  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 307  * was received.  We need to ensure we receive the statistics in order
 308  * to update the temperature used for calibrating the TXPOWER.
 309  */
 310 static void iwl_bg_statistics_periodic(unsigned long data)
 311 {
 312         struct iwl_priv *priv = (struct iwl_priv *)data;
 313
 314         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 315                 return;
 316
 317         /* dont send host command if rf-kill is on */
 318         if (!iwl_is_ready_rf(priv))
 319                 return;
 320
 321         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 322 }
 323
 324
 325 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 326                                         u32 start_idx, u32 num_events,
 327                                         u32 mode)
 328 {
 329         u32 i;
 330         u32 ptr;        /* SRAM byte address of log data */
 331         u32 ev, time, data; /* event log data */
 332         unsigned long reg_flags;
 333
 334         if (mode == 0)
 335                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 336         else
 337                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 338
 339         /* Make sure device is powered up for SRAM reads */
 340         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 341         if (iwl_grab_nic_access(priv)) {
 342                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 343                 return;
 344         }
 345
 346         /* Set starting address; reads will auto-increment */
 347         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
 348         rmb();
 349
 350         /*
 351          * "time" is actually "data" for mode 0 (no timestamp).
 352          * place event id # at far right for easier visual parsing.
 353          */
 354         for (i = 0; i < num_events; i++) {
 355                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 356                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 357                 if (mode == 0) {
 358                         trace_iwlwifi_dev_ucode_cont_event(priv,
 359                                                         0, time, ev);
 360                 } else {
 361                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 362                         trace_iwlwifi_dev_ucode_cont_event(priv,
 363                                                 time, data, ev);
 364                 }
 365         }
 366         /* Allow device to power down */
 367         iwl_release_nic_access(priv);
 368         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 369 }
 370
 371 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 372 {
 373         u32 capacity;   /* event log capacity in # entries */
 374         u32 base;       /* SRAM byte address of event log header */
 375         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 376         u32 num_wraps;  /* # times uCode wrapped to top of log */
 377         u32 next_entry; /* index of next entry to be written by uCode */
 378
 379         base = priv->device_pointers.error_event_table;
 380         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
 381                 capacity = iwl_read_targ_mem(priv, base);
 382                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
 383                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
 384                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
 385         } else
 386                 return;
 387
 388         if (num_wraps == priv->event_log.num_wraps) {
 389                 iwl_print_cont_event_trace(priv,
 390                                        base, priv->event_log.next_entry,
 391                                        next_entry - priv->event_log.next_entry,
 392                                        mode);
 393                 priv->event_log.non_wraps_count++;
 394         } else {
 395                 if ((num_wraps - priv->event_log.num_wraps) > 1)
 396                         priv->event_log.wraps_more_count++;
 397                 else
 398                         priv->event_log.wraps_once_count++;
 399                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 400                                 num_wraps - priv->event_log.num_wraps,
 401                                 next_entry, priv->event_log.next_entry);
 402                 if (next_entry < priv->event_log.next_entry) {
 403                         iwl_print_cont_event_trace(priv, base,
 404                                priv->event_log.next_entry,
 405                                capacity - priv->event_log.next_entry,
 406                                mode);
 407
 408                         iwl_print_cont_event_trace(priv, base, 0,
 409                                 next_entry, mode);
 410                 } else {
 411                         iwl_print_cont_event_trace(priv, base,
 412                                next_entry, capacity - next_entry,
 413                                mode);
 414
 415                         iwl_print_cont_event_trace(priv, base, 0,
 416                                 next_entry, mode);
 417                 }
 418         }
 419         priv->event_log.num_wraps = num_wraps;
 420         priv->event_log.next_entry = next_entry;
 421 }
 422
 423 /**
 424  * iwl_bg_ucode_trace - Timer callback to log ucode event
 425  *
 426  * The timer is continually set to execute every
 427  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 428  * this function is to perform continuous uCode event logging operation
 429  * if enabled
 430  */
 431 static void iwl_bg_ucode_trace(unsigned long data)
 432 {
 433         struct iwl_priv *priv = (struct iwl_priv *)data;
 434
 435         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 436                 return;
 437
 438         if (priv->event_log.ucode_trace) {
 439                 iwl_continuous_event_trace(priv);
 440                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 441                 mod_timer(&priv->ucode_trace,
 442                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 443         }
 444 }
 445
 446 static void iwl_bg_tx_flush(struct work_struct *work)
 447 {
 448         struct iwl_priv *priv =
 449                 container_of(work, struct iwl_priv, tx_flush);
 450
 451         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 452                 return;
 453
 454         /* do nothing if rf-kill is on */
 455         if (!iwl_is_ready_rf(priv))
 456                 return;
 457
 458         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 459         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 460 }
 461
 462 /**
 463  * iwl_rx_handle - Main entry function for receiving responses from uCode
 464  *
 465  * Uses the priv->rx_handlers callback function array to invoke
 466  * the appropriate handlers, including command responses,
 467  * frame-received notifications, and other notifications.
 468  */
 469 static void iwl_rx_handle(struct iwl_priv *priv)
 470 {
 471         struct iwl_rx_mem_buffer *rxb;
 472         struct iwl_rx_packet *pkt;
 473         struct iwl_rx_queue *rxq = &priv->rxq;
 474         u32 r, i;
 475         int reclaim;
 476         unsigned long flags;
 477         u8 fill_rx = 0;
 478         u32 count = 8;
 479         int total_empty;
 480
 481         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 482          * buffer that the driver may process (last buffer filled by ucode). */
 483         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 484         i = rxq->read;
 485
 486         /* Rx interrupt, but nothing sent from uCode */
 487         if (i == r)
 488                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 489
 490         /* calculate total frames need to be restock after handling RX */
 491         total_empty = r - rxq->write_actual;
 492         if (total_empty < 0)
 493                 total_empty += RX_QUEUE_SIZE;
 494
 495         if (total_empty > (RX_QUEUE_SIZE / 2))
 496                 fill_rx = 1;
 497
 498         while (i != r) {
 499                 int len;
 500
 501                 rxb = rxq->queue[i];
 502
 503                 /* If an RXB doesn't have a Rx queue slot associated with it,
 504                  * then a bug has been introduced in the queue refilling
 505                  * routines -- catch it here */
 506                 if (WARN_ON(rxb == NULL)) {
 507                         i = (i + 1) & RX_QUEUE_MASK;
 508                         continue;
 509                 }
 510
 511                 rxq->queue[i] = NULL;
 512
 513                 dma_unmap_page(priv->bus.dev, rxb->page_dma,
 514                                PAGE_SIZE << priv->hw_params.rx_page_order,
 515                                DMA_FROM_DEVICE);
 516                 pkt = rxb_addr(rxb);
 517
 518                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 519                 len += sizeof(u32); /* account for status word */
 520                 trace_iwlwifi_dev_rx(priv, pkt, len);
 521
 522                 /* Reclaim a command buffer only if this packet is a response
 523                  *   to a (driver-originated) command.
 524                  * If the packet (e.g. Rx frame) originated from uCode,
 525                  *   there is no command buffer to reclaim.
 526                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 527                  *   but apparently a few don't get set; catch them here. */
 528                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 529                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 530                         (pkt->hdr.cmd != REPLY_RX) &&
 531                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 532                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 533                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 534                         (pkt->hdr.cmd != REPLY_TX);
 535
 536                 /*
 537                  * Do the notification wait before RX handlers so
 538                  * even if the RX handler consumes the RXB we have
 539                  * access to it in the notification wait entry.
 540                  */
 541                 if (!list_empty(&priv->_agn.notif_waits)) {
 542                         struct iwl_notification_wait *w;
 543
 544                         spin_lock(&priv->_agn.notif_wait_lock);
 545                         list_for_each_entry(w, &priv->_agn.notif_waits, list) {
 546                                 if (w->cmd == pkt->hdr.cmd) {
 547                                         w->triggered = true;
 548                                         if (w->fn)
 549                                                 w->fn(priv, pkt, w->fn_data);
 550                                 }
 551                         }
 552                         spin_unlock(&priv->_agn.notif_wait_lock);
 553
 554                         wake_up_all(&priv->_agn.notif_waitq);
 555                 }
 556                 if (priv->pre_rx_handler)
 557                         priv->pre_rx_handler(priv, rxb);
 558
 559                 /* Based on type of command response or notification,
 560                  *   handle those that need handling via function in
 561                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 562                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 563                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 564                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 565                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 566                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 567                 } else {
 568                         /* No handling needed */
 569                         IWL_DEBUG_RX(priv,
 570                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 571                                 r, i, get_cmd_string(pkt->hdr.cmd),
 572                                 pkt->hdr.cmd);
 573                 }
 574
 575                 /*
 576                  * XXX: After here, we should always check rxb->page
 577                  * against NULL before touching it or its virtual
 578                  * memory (pkt). Because some rx_handler might have
 579                  * already taken or freed the pages.
 580                  */
 581
 582                 if (reclaim) {
 583                         /* Invoke any callbacks, transfer the buffer to caller,
 584                          * and fire off the (possibly) blocking iwl_send_cmd()
 585                          * as we reclaim the driver command queue */
 586                         if (rxb->page)
 587                                 iwl_tx_cmd_complete(priv, rxb);
 588                         else
 589                                 IWL_WARN(priv, "Claim null rxb?\n");
 590                 }
 591
 592                 /* Reuse the page if possible. For notification packets and
 593                  * SKBs that fail to Rx correctly, add them back into the
 594                  * rx_free list for reuse later. */
 595                 spin_lock_irqsave(&rxq->lock, flags);
 596                 if (rxb->page != NULL) {
 597                         rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
 598                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
 599                                 DMA_FROM_DEVICE);
 600                         list_add_tail(&rxb->list, &rxq->rx_free);
 601                         rxq->free_count++;
 602                 } else
 603                         list_add_tail(&rxb->list, &rxq->rx_used);
 604
 605                 spin_unlock_irqrestore(&rxq->lock, flags);
 606
 607                 i = (i + 1) & RX_QUEUE_MASK;
 608                 /* If there are a lot of unused frames,
 609                  * restock the Rx queue so ucode wont assert. */
 610                 if (fill_rx) {
 611                         count++;
 612                         if (count >= 8) {
 613                                 rxq->read = i;
 614                                 iwlagn_rx_replenish_now(priv);
 615                                 count = 0;
 616                         }
 617                 }
 618         }
 619
 620         /* Backtrack one entry */
 621         rxq->read = i;
 622         if (fill_rx)
 623                 iwlagn_rx_replenish_now(priv);
 624         else
 625                 iwlagn_rx_queue_restock(priv);
 626 }
 627
 628 /* tasklet for iwlagn interrupt */
 629 static void iwl_irq_tasklet(struct iwl_priv *priv)
 630 {
 631         u32 inta = 0;
 632         u32 handled = 0;
 633         unsigned long flags;
 634         u32 i;
 635 #ifdef CONFIG_IWLWIFI_DEBUG
 636         u32 inta_mask;
 637 #endif
 638
 639         spin_lock_irqsave(&priv->lock, flags);
 640
 641         /* Ack/clear/reset pending uCode interrupts.
 642          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 643          */
 644         /* There is a hardware bug in the interrupt mask function that some
 645          * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
 646          * they are disabled in the CSR_INT_MASK register. Furthermore the
 647          * ICT interrupt handling mechanism has another bug that might cause
 648          * these unmasked interrupts fail to be detected. We workaround the
 649          * hardware bugs here by ACKing all the possible interrupts so that
 650          * interrupt coalescing can still be achieved.
 651          */
 652         iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
 653
 654         inta = priv->_agn.inta;
 655
 656 #ifdef CONFIG_IWLWIFI_DEBUG
 657         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
 658                 /* just for debug */
 659                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 660                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
 661                                 inta, inta_mask);
 662         }
 663 #endif
 664
 665         spin_unlock_irqrestore(&priv->lock, flags);
 666
 667         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
 668         priv->_agn.inta = 0;
 669
 670         /* Now service all interrupt bits discovered above. */
 671         if (inta & CSR_INT_BIT_HW_ERR) {
 672                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 673
 674                 /* Tell the device to stop sending interrupts */
 675                 iwl_disable_interrupts(priv);
 676
 677                 priv->isr_stats.hw++;
 678                 iwl_irq_handle_error(priv);
 679
 680                 handled |= CSR_INT_BIT_HW_ERR;
 681
 682                 return;
 683         }
 684
 685 #ifdef CONFIG_IWLWIFI_DEBUG
 686         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
 687                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
 688                 if (inta & CSR_INT_BIT_SCD) {
 689                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
 690                                       "the frame/frames.\n");
 691                         priv->isr_stats.sch++;
 692                 }
 693
 694                 /* Alive notification via Rx interrupt will do the real work */
 695                 if (inta & CSR_INT_BIT_ALIVE) {
 696                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
 697                         priv->isr_stats.alive++;
 698                 }
 699         }
 700 #endif
 701         /* Safely ignore these bits for debug checks below */
 702         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
 703
 704         /* HW RF KILL switch toggled */
 705         if (inta & CSR_INT_BIT_RF_KILL) {
 706                 int hw_rf_kill = 0;
 707                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
 708                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
 709                         hw_rf_kill = 1;
 710
 711                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
 712                                 hw_rf_kill ? "disable radio" : "enable radio");
 713
 714                 priv->isr_stats.rfkill++;
 715
 716                 /* driver only loads ucode once setting the interface up.
 717                  * the driver allows loading the ucode even if the radio
 718                  * is killed. Hence update the killswitch state here. The
 719                  * rfkill handler will care about restarting if needed.
 720                  */
 721                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
 722                         if (hw_rf_kill)
 723                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 724                         else
 725                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 726                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
 727                 }
 728
 729                 handled |= CSR_INT_BIT_RF_KILL;
 730         }
 731
 732         /* Chip got too hot and stopped itself */
 733         if (inta & CSR_INT_BIT_CT_KILL) {
 734                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
 735                 priv->isr_stats.ctkill++;
 736                 handled |= CSR_INT_BIT_CT_KILL;
 737         }
 738
 739         /* Error detected by uCode */
 740         if (inta & CSR_INT_BIT_SW_ERR) {
 741                 IWL_ERR(priv, "Microcode SW error detected. "
 742                         " Restarting 0x%X.\n", inta);
 743                 priv->isr_stats.sw++;
 744                 iwl_irq_handle_error(priv);
 745                 handled |= CSR_INT_BIT_SW_ERR;
 746         }
 747
 748         /* uCode wakes up after power-down sleep */
 749         if (inta & CSR_INT_BIT_WAKEUP) {
 750                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
 751                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
 752                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
 753                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
 754
 755                 priv->isr_stats.wakeup++;
 756
 757                 handled |= CSR_INT_BIT_WAKEUP;
 758         }
 759
 760         /* All uCode command responses, including Tx command responses,
 761          * Rx "responses" (frame-received notification), and other
 762          * notifications from uCode come through here*/
 763         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
 764                         CSR_INT_BIT_RX_PERIODIC)) {
 765                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
 766                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
 767                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
 768                         iwl_write32(priv, CSR_FH_INT_STATUS,
 769                                         CSR_FH_INT_RX_MASK);
 770                 }
 771                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
 772                         handled |= CSR_INT_BIT_RX_PERIODIC;
 773                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
 774                 }
 775                 /* Sending RX interrupt require many steps to be done in the
 776                  * the device:
 777                  * 1- write interrupt to current index in ICT table.
 778                  * 2- dma RX frame.
 779                  * 3- update RX shared data to indicate last write index.
 780                  * 4- send interrupt.
 781                  * This could lead to RX race, driver could receive RX interrupt
 782                  * but the shared data changes does not reflect this;
 783                  * periodic interrupt will detect any dangling Rx activity.
 784                  */
 785
 786                 /* Disable periodic interrupt; we use it as just a one-shot. */
 787                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
 788                             CSR_INT_PERIODIC_DIS);
 789                 iwl_rx_handle(priv);
 790
 791                 /*
 792                  * Enable periodic interrupt in 8 msec only if we received
 793                  * real RX interrupt (instead of just periodic int), to catch
 794                  * any dangling Rx interrupt.  If it was just the periodic
 795                  * interrupt, there was no dangling Rx activity, and no need
 796                  * to extend the periodic interrupt; one-shot is enough.
 797                  */
 798                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
 799                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
 800                                     CSR_INT_PERIODIC_ENA);
 801
 802                 priv->isr_stats.rx++;
 803         }
 804
 805         /* This "Tx" DMA channel is used only for loading uCode */
 806         if (inta & CSR_INT_BIT_FH_TX) {
 807                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
 808                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
 809                 priv->isr_stats.tx++;
 810                 handled |= CSR_INT_BIT_FH_TX;
 811                 /* Wake up uCode load routine, now that load is complete */
 812                 priv->ucode_write_complete = 1;
 813                 wake_up_interruptible(&priv->wait_command_queue);
 814         }
 815
 816         if (inta & ~handled) {
 817                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
 818                 priv->isr_stats.unhandled++;
 819         }
 820
 821         if (inta & ~(priv->inta_mask)) {
 822                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
 823                          inta & ~priv->inta_mask);
 824         }
 825
 826         /* Re-enable all interrupts */
 827         /* only Re-enable if disabled by irq */
 828         if (test_bit(STATUS_INT_ENABLED, &priv->status))
 829                 iwl_enable_interrupts(priv);
 830         /* Re-enable RF_KILL if it occurred */
 831         else if (handled & CSR_INT_BIT_RF_KILL)
 832                 iwl_enable_rfkill_int(priv);
 833 }
 834
 835 /*****************************************************************************
 836  *
 837  * sysfs attributes
 838  *
 839  *****************************************************************************/
 840
 841 #ifdef CONFIG_IWLWIFI_DEBUG
 842
 843 /*
 844  * The following adds a new attribute to the sysfs representation
 845  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
 846  * used for controlling the debug level.
 847  *
 848  * See the level definitions in iwl for details.
 849  *
 850  * The debug_level being managed using sysfs below is a per device debug
 851  * level that is used instead of the global debug level if it (the per
 852  * device debug level) is set.
 853  */
 854 static ssize_t show_debug_level(struct device *d,
 855                                 struct device_attribute *attr, char *buf)
 856 {
 857         struct iwl_priv *priv = dev_get_drvdata(d);
 858         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
 859 }
 860 static ssize_t store_debug_level(struct device *d,
 861                                 struct device_attribute *attr,
 862                                  const char *buf, size_t count)
 863 {
 864         struct iwl_priv *priv = dev_get_drvdata(d);
 865         unsigned long val;
 866         int ret;
 867
 868         ret = strict_strtoul(buf, 0, &val);
 869         if (ret)
 870                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
 871         else {
 872                 priv->debug_level = val;
 873                 if (iwl_alloc_traffic_mem(priv))
 874                         IWL_ERR(priv,
 875                                 "Not enough memory to generate traffic log\n");
 876         }
 877         return strnlen(buf, count);
 878 }
 879
 880 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
 881                         show_debug_level, store_debug_level);
 882
 883
 884 #endif /* CONFIG_IWLWIFI_DEBUG */
 885
 886
 887 static ssize_t show_temperature(struct device *d,
 888                                 struct device_attribute *attr, char *buf)
 889 {
 890         struct iwl_priv *priv = dev_get_drvdata(d);
 891
 892         if (!iwl_is_alive(priv))
 893                 return -EAGAIN;
 894
 895         return sprintf(buf, "%d\n", priv->temperature);
 896 }
 897
 898 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
 899
 900 static ssize_t show_tx_power(struct device *d,
 901                              struct device_attribute *attr, char *buf)
 902 {
 903         struct iwl_priv *priv = dev_get_drvdata(d);
 904
 905         if (!iwl_is_ready_rf(priv))
 906                 return sprintf(buf, "off\n");
 907         else
 908                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
 909 }
 910
 911 static ssize_t store_tx_power(struct device *d,
 912                               struct device_attribute *attr,
 913                               const char *buf, size_t count)
 914 {
 915         struct iwl_priv *priv = dev_get_drvdata(d);
 916         unsigned long val;
 917         int ret;
 918
 919         ret = strict_strtoul(buf, 10, &val);
 920         if (ret)
 921                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
 922         else {
 923                 ret = iwl_set_tx_power(priv, val, false);
 924                 if (ret)
 925                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
 926                                 ret);
 927                 else
 928                         ret = count;
 929         }
 930         return ret;
 931 }
 932
 933 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
 934
 935 static struct attribute *iwl_sysfs_entries[] = {
 936         &dev_attr_temperature.attr,
 937         &dev_attr_tx_power.attr,
 938 #ifdef CONFIG_IWLWIFI_DEBUG
 939         &dev_attr_debug_level.attr,
 940 #endif
 941         NULL
 942 };
 943
 944 static struct attribute_group iwl_attribute_group = {
 945         .name = NULL,           /* put in device directory */
 946         .attrs = iwl_sysfs_entries,
 947 };
 948
 949 /******************************************************************************
 950  *
 951  * uCode download functions
 952  *
 953  ******************************************************************************/
 954
 955 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
 956 {
 957         if (desc->v_addr)
 958                 dma_free_coherent(priv->bus.dev, desc->len,
 959                                   desc->v_addr, desc->p_addr);
 960         desc->v_addr = NULL;
 961         desc->len = 0;
 962 }
 963
 964 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
 965 {
 966         iwl_free_fw_desc(priv, &img->code);
 967         iwl_free_fw_desc(priv, &img->data);
 968 }
 969
 970 static void iwl_dealloc_ucode(struct iwl_priv *priv)
 971 {
 972         iwl_free_fw_img(priv, &priv->ucode_rt);
 973         iwl_free_fw_img(priv, &priv->ucode_init);
 974 }
 975
 976 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
 977                              const void *data, size_t len)
 978 {
 979         if (!len) {
 980                 desc->v_addr = NULL;
 981                 return -EINVAL;
 982         }
 983
 984         desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
 985                                           &desc->p_addr, GFP_KERNEL);
 986         if (!desc->v_addr)
 987                 return -ENOMEM;
 988
 989         desc->len = len;
 990         memcpy(desc->v_addr, data, len);
 991         return 0;
 992 }
 993
 994 struct iwlagn_ucode_capabilities {
 995         u32 max_probe_length;
 996         u32 standard_phy_calibration_size;
 997         u32 flags;
 998 };
 999
1000 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
1001 static int iwl_mac_setup_register(struct iwl_priv *priv,
1002                                   struct iwlagn_ucode_capabilities *capa);
1003
1004 #define UCODE_EXPERIMENTAL_INDEX        100
1005 #define UCODE_EXPERIMENTAL_TAG          "exp"
1006
1007 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
1008 {
1009         const char *name_pre = priv->cfg->fw_name_pre;
1010         char tag[8];
1011
1012         if (first) {
1013 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
1014                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
1015                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
1016         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
1017 #endif
1018                 priv->fw_index = priv->cfg->ucode_api_max;
1019                 sprintf(tag, "%d", priv->fw_index);
1020         } else {
1021                 priv->fw_index--;
1022                 sprintf(tag, "%d", priv->fw_index);
1023         }
1024
1025         if (priv->fw_index < priv->cfg->ucode_api_min) {
1026                 IWL_ERR(priv, "no suitable firmware found!\n");
1027                 return -ENOENT;
1028         }
1029
1030         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1031
1032         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1033                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1034                                 ? "EXPERIMENTAL " : "",
1035                        priv->firmware_name);
1036
1037         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1038                                        priv->bus.dev,
1039                                        GFP_KERNEL, priv, iwl_ucode_callback);
1040 }
1041
1042 struct iwlagn_firmware_pieces {
1043         const void *inst, *data, *init, *init_data;
1044         size_t inst_size, data_size, init_size, init_data_size;
1045
1046         u32 build;
1047
1048         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1049         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1050 };
1051
1052 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1053                                        const struct firmware *ucode_raw,
1054                                        struct iwlagn_firmware_pieces *pieces)
1055 {
1056         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1057         u32 api_ver, hdr_size;
1058         const u8 *src;
1059
1060         priv->ucode_ver = le32_to_cpu(ucode->ver);
1061         api_ver = IWL_UCODE_API(priv->ucode_ver);
1062
1063         switch (api_ver) {
1064         default:
1065                 hdr_size = 28;
1066                 if (ucode_raw->size < hdr_size) {
1067                         IWL_ERR(priv, "File size too small!\n");
1068                         return -EINVAL;
1069                 }
1070                 pieces->build = le32_to_cpu(ucode->u.v2.build);
1071                 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1072                 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1073                 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1074                 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1075                 src = ucode->u.v2.data;
1076                 break;
1077         case 0:
1078         case 1:
1079         case 2:
1080                 hdr_size = 24;
1081                 if (ucode_raw->size < hdr_size) {
1082                         IWL_ERR(priv, "File size too small!\n");
1083                         return -EINVAL;
1084                 }
1085                 pieces->build = 0;
1086                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1087                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1088                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1089                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1090                 src = ucode->u.v1.data;
1091                 break;
1092         }
1093
1094         /* Verify size of file vs. image size info in file's header */
1095         if (ucode_raw->size != hdr_size + pieces->inst_size +
1096                                 pieces->data_size + pieces->init_size +
1097                                 pieces->init_data_size) {
1098
1099                 IWL_ERR(priv,
1100                         "uCode file size %d does not match expected size\n",
1101                         (int)ucode_raw->size);
1102                 return -EINVAL;
1103         }
1104
1105         pieces->inst = src;
1106         src += pieces->inst_size;
1107         pieces->data = src;
1108         src += pieces->data_size;
1109         pieces->init = src;
1110         src += pieces->init_size;
1111         pieces->init_data = src;
1112         src += pieces->init_data_size;
1113
1114         return 0;
1115 }
1116
1117 static int iwlagn_wanted_ucode_alternative = 1;
1118
1119 static int iwlagn_load_firmware(struct iwl_priv *priv,
1120                                 const struct firmware *ucode_raw,
1121                                 struct iwlagn_firmware_pieces *pieces,
1122                                 struct iwlagn_ucode_capabilities *capa)
1123 {
1124         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1125         struct iwl_ucode_tlv *tlv;
1126         size_t len = ucode_raw->size;
1127         const u8 *data;
1128         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1129         u64 alternatives;
1130         u32 tlv_len;
1131         enum iwl_ucode_tlv_type tlv_type;
1132         const u8 *tlv_data;
1133
1134         if (len < sizeof(*ucode)) {
1135                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1136                 return -EINVAL;
1137         }
1138
1139         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1140                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1141                         le32_to_cpu(ucode->magic));
1142                 return -EINVAL;
1143         }
1144
1145         /*
1146          * Check which alternatives are present, and "downgrade"
1147          * when the chosen alternative is not present, warning
1148          * the user when that happens. Some files may not have
1149          * any alternatives, so don't warn in that case.
1150          */
1151         alternatives = le64_to_cpu(ucode->alternatives);
1152         tmp = wanted_alternative;
1153         if (wanted_alternative > 63)
1154                 wanted_alternative = 63;
1155         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1156                 wanted_alternative--;
1157         if (wanted_alternative && wanted_alternative != tmp)
1158                 IWL_WARN(priv,
1159                          "uCode alternative %d not available, choosing %d\n",
1160                          tmp, wanted_alternative);
1161
1162         priv->ucode_ver = le32_to_cpu(ucode->ver);
1163         pieces->build = le32_to_cpu(ucode->build);
1164         data = ucode->data;
1165
1166         len -= sizeof(*ucode);
1167
1168         while (len >= sizeof(*tlv)) {
1169                 u16 tlv_alt;
1170
1171                 len -= sizeof(*tlv);
1172                 tlv = (void *)data;
1173
1174                 tlv_len = le32_to_cpu(tlv->length);
1175                 tlv_type = le16_to_cpu(tlv->type);
1176                 tlv_alt = le16_to_cpu(tlv->alternative);
1177                 tlv_data = tlv->data;
1178
1179                 if (len < tlv_len) {
1180                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1181                                 len, tlv_len);
1182                         return -EINVAL;
1183                 }
1184                 len -= ALIGN(tlv_len, 4);
1185                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1186
1187                 /*
1188                  * Alternative 0 is always valid.
1189                  *
1190                  * Skip alternative TLVs that are not selected.
1191                  */
1192                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1193                         continue;
1194
1195                 switch (tlv_type) {
1196                 case IWL_UCODE_TLV_INST:
1197                         pieces->inst = tlv_data;
1198                         pieces->inst_size = tlv_len;
1199                         break;
1200                 case IWL_UCODE_TLV_DATA:
1201                         pieces->data = tlv_data;
1202                         pieces->data_size = tlv_len;
1203                         break;
1204                 case IWL_UCODE_TLV_INIT:
1205                         pieces->init = tlv_data;
1206                         pieces->init_size = tlv_len;
1207                         break;
1208                 case IWL_UCODE_TLV_INIT_DATA:
1209                         pieces->init_data = tlv_data;
1210                         pieces->init_data_size = tlv_len;
1211                         break;
1212                 case IWL_UCODE_TLV_BOOT:
1213                         IWL_ERR(priv, "Found unexpected BOOT ucode\n");
1214                         break;
1215                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1216                         if (tlv_len != sizeof(u32))
1217                                 goto invalid_tlv_len;
1218                         capa->max_probe_length =
1219                                         le32_to_cpup((__le32 *)tlv_data);
1220                         break;
1221                 case IWL_UCODE_TLV_PAN:
1222                         if (tlv_len)
1223                                 goto invalid_tlv_len;
1224                         capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
1225                         break;
1226                 case IWL_UCODE_TLV_FLAGS:
1227                         /* must be at least one u32 */
1228                         if (tlv_len < sizeof(u32))
1229                                 goto invalid_tlv_len;
1230                         /* and a proper number of u32s */
1231                         if (tlv_len % sizeof(u32))
1232                                 goto invalid_tlv_len;
1233                         /*
1234                          * This driver only reads the first u32 as
1235                          * right now no more features are defined,
1236                          * if that changes then either the driver
1237                          * will not work with the new firmware, or
1238                          * it'll not take advantage of new features.
1239                          */
1240                         capa->flags = le32_to_cpup((__le32 *)tlv_data);
1241                         break;
1242                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1243                         if (tlv_len != sizeof(u32))
1244                                 goto invalid_tlv_len;
1245                         pieces->init_evtlog_ptr =
1246                                         le32_to_cpup((__le32 *)tlv_data);
1247                         break;
1248                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1249                         if (tlv_len != sizeof(u32))
1250                                 goto invalid_tlv_len;
1251                         pieces->init_evtlog_size =
1252                                         le32_to_cpup((__le32 *)tlv_data);
1253                         break;
1254                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1255                         if (tlv_len != sizeof(u32))
1256                                 goto invalid_tlv_len;
1257                         pieces->init_errlog_ptr =
1258                                         le32_to_cpup((__le32 *)tlv_data);
1259                         break;
1260                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1261                         if (tlv_len != sizeof(u32))
1262                                 goto invalid_tlv_len;
1263                         pieces->inst_evtlog_ptr =
1264                                         le32_to_cpup((__le32 *)tlv_data);
1265                         break;
1266                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1267                         if (tlv_len != sizeof(u32))
1268                                 goto invalid_tlv_len;
1269                         pieces->inst_evtlog_size =
1270                                         le32_to_cpup((__le32 *)tlv_data);
1271                         break;
1272                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1273                         if (tlv_len != sizeof(u32))
1274                                 goto invalid_tlv_len;
1275                         pieces->inst_errlog_ptr =
1276                                         le32_to_cpup((__le32 *)tlv_data);
1277                         break;
1278                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1279                         if (tlv_len)
1280                                 goto invalid_tlv_len;
1281                         priv->enhance_sensitivity_table = true;
1282                         break;
1283                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1284                         if (tlv_len != sizeof(u32))
1285                                 goto invalid_tlv_len;
1286                         capa->standard_phy_calibration_size =
1287                                         le32_to_cpup((__le32 *)tlv_data);
1288                         break;
1289                 default:
1290                         IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
1291                         break;
1292                 }
1293         }
1294
1295         if (len) {
1296                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1297                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1298                 return -EINVAL;
1299         }
1300
1301         return 0;
1302
1303  invalid_tlv_len:
1304         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1305         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1306
1307         return -EINVAL;
1308 }
1309
1310 /**
1311  * iwl_ucode_callback - callback when firmware was loaded
1312  *
1313  * If loaded successfully, copies the firmware into buffers
1314  * for the card to fetch (via DMA).
1315  */
1316 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1317 {
1318         struct iwl_priv *priv = context;
1319         struct iwl_ucode_header *ucode;
1320         int err;
1321         struct iwlagn_firmware_pieces pieces;
1322         const unsigned int api_max = priv->cfg->ucode_api_max;
1323         const unsigned int api_min = priv->cfg->ucode_api_min;
1324         u32 api_ver;
1325         char buildstr[25];
1326         u32 build;
1327         struct iwlagn_ucode_capabilities ucode_capa = {
1328                 .max_probe_length = 200,
1329                 .standard_phy_calibration_size =
1330                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1331         };
1332
1333         memset(&pieces, 0, sizeof(pieces));
1334
1335         if (!ucode_raw) {
1336                 if (priv->fw_index <= priv->cfg->ucode_api_max)
1337                         IWL_ERR(priv,
1338                                 "request for firmware file '%s' failed.\n",
1339                                 priv->firmware_name);
1340                 goto try_again;
1341         }
1342
1343         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1344                        priv->firmware_name, ucode_raw->size);
1345
1346         /* Make sure that we got at least the API version number */
1347         if (ucode_raw->size < 4) {
1348                 IWL_ERR(priv, "File size way too small!\n");
1349                 goto try_again;
1350         }
1351
1352         /* Data from ucode file:  header followed by uCode images */
1353         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1354
1355         if (ucode->ver)
1356                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1357         else
1358                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1359                                            &ucode_capa);
1360
1361         if (err)
1362                 goto try_again;
1363
1364         api_ver = IWL_UCODE_API(priv->ucode_ver);
1365         build = pieces.build;
1366
1367         /*
1368          * api_ver should match the api version forming part of the
1369          * firmware filename ... but we don't check for that and only rely
1370          * on the API version read from firmware header from here on forward
1371          */
1372         /* no api version check required for experimental uCode */
1373         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1374                 if (api_ver < api_min || api_ver > api_max) {
1375                         IWL_ERR(priv,
1376                                 "Driver unable to support your firmware API. "
1377                                 "Driver supports v%u, firmware is v%u.\n",
1378                                 api_max, api_ver);
1379                         goto try_again;
1380                 }
1381
1382                 if (api_ver != api_max)
1383                         IWL_ERR(priv,
1384                                 "Firmware has old API version. Expected v%u, "
1385                                 "got v%u. New firmware can be obtained "
1386                                 "from http://www.intellinuxwireless.org.\n",
1387                                 api_max, api_ver);
1388         }
1389
1390         if (build)
1391                 sprintf(buildstr, " build %u%s", build,
1392                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1393                                 ? " (EXP)" : "");
1394         else
1395                 buildstr[0] = '\0';
1396
1397         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1398                  IWL_UCODE_MAJOR(priv->ucode_ver),
1399                  IWL_UCODE_MINOR(priv->ucode_ver),
1400                  IWL_UCODE_API(priv->ucode_ver),
1401                  IWL_UCODE_SERIAL(priv->ucode_ver),
1402                  buildstr);
1403
1404         snprintf(priv->hw->wiphy->fw_version,
1405                  sizeof(priv->hw->wiphy->fw_version),
1406                  "%u.%u.%u.%u%s",
1407                  IWL_UCODE_MAJOR(priv->ucode_ver),
1408                  IWL_UCODE_MINOR(priv->ucode_ver),
1409                  IWL_UCODE_API(priv->ucode_ver),
1410                  IWL_UCODE_SERIAL(priv->ucode_ver),
1411                  buildstr);
1412
1413         /*
1414          * For any of the failures below (before allocating pci memory)
1415          * we will try to load a version with a smaller API -- maybe the
1416          * user just got a corrupted version of the latest API.
1417          */
1418
1419         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1420                        priv->ucode_ver);
1421         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1422                        pieces.inst_size);
1423         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1424                        pieces.data_size);
1425         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1426                        pieces.init_size);
1427         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1428                        pieces.init_data_size);
1429
1430         /* Verify that uCode images will fit in card's SRAM */
1431         if (pieces.inst_size > priv->hw_params.max_inst_size) {
1432                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1433                         pieces.inst_size);
1434                 goto try_again;
1435         }
1436
1437         if (pieces.data_size > priv->hw_params.max_data_size) {
1438                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1439                         pieces.data_size);
1440                 goto try_again;
1441         }
1442
1443         if (pieces.init_size > priv->hw_params.max_inst_size) {
1444                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1445                         pieces.init_size);
1446                 goto try_again;
1447         }
1448
1449         if (pieces.init_data_size > priv->hw_params.max_data_size) {
1450                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1451                         pieces.init_data_size);
1452                 goto try_again;
1453         }
1454
1455         /* Allocate ucode buffers for card's bus-master loading ... */
1456
1457         /* Runtime instructions and 2 copies of data:
1458          * 1) unmodified from disk
1459          * 2) backup cache for save/restore during power-downs */
1460         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1461                               pieces.inst, pieces.inst_size))
1462                 goto err_pci_alloc;
1463         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1464                               pieces.data, pieces.data_size))
1465                 goto err_pci_alloc;
1466
1467         /* Initialization instructions and data */
1468         if (pieces.init_size && pieces.init_data_size) {
1469                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1470                                       pieces.init, pieces.init_size))
1471                         goto err_pci_alloc;
1472                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1473                                       pieces.init_data, pieces.init_data_size))
1474                         goto err_pci_alloc;
1475         }
1476
1477         /* Now that we can no longer fail, copy information */
1478
1479         /*
1480          * The (size - 16) / 12 formula is based on the information recorded
1481          * for each event, which is of mode 1 (including timestamp) for all
1482          * new microcodes that include this information.
1483          */
1484         priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1485         if (pieces.init_evtlog_size)
1486                 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1487         else
1488                 priv->_agn.init_evtlog_size =
1489                         priv->cfg->base_params->max_event_log_size;
1490         priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1491         priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1492         if (pieces.inst_evtlog_size)
1493                 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1494         else
1495                 priv->_agn.inst_evtlog_size =
1496                         priv->cfg->base_params->max_event_log_size;
1497         priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1498
1499         priv->new_scan_threshold_behaviour =
1500                 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1501
1502         if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1503             (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1504                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1505                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1506         } else
1507                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1508
1509         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1510                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1511         else
1512                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1513
1514         /*
1515          * figure out the offset of chain noise reset and gain commands
1516          * base on the size of standard phy calibration commands table size
1517          */
1518         if (ucode_capa.standard_phy_calibration_size >
1519             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1520                 ucode_capa.standard_phy_calibration_size =
1521                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1522
1523         priv->_agn.phy_calib_chain_noise_reset_cmd =
1524                 ucode_capa.standard_phy_calibration_size;
1525         priv->_agn.phy_calib_chain_noise_gain_cmd =
1526                 ucode_capa.standard_phy_calibration_size + 1;
1527
1528         /**************************************************
1529          * This is still part of probe() in a sense...
1530          *
1531          * 9. Setup and register with mac80211 and debugfs
1532          **************************************************/
1533         err = iwl_mac_setup_register(priv, &ucode_capa);
1534         if (err)
1535                 goto out_unbind;
1536
1537         err = iwl_dbgfs_register(priv, DRV_NAME);
1538         if (err)
1539                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1540
1541         err = sysfs_create_group(&(priv->bus.dev->kobj),
1542                                         &iwl_attribute_group);
1543         if (err) {
1544                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1545                 goto out_unbind;
1546         }
1547
1548         /* We have our copies now, allow OS release its copies */
1549         release_firmware(ucode_raw);
1550         complete(&priv->_agn.firmware_loading_complete);
1551         return;
1552
1553  try_again:
1554         /* try next, if any */
1555         if (iwl_request_firmware(priv, false))
1556                 goto out_unbind;
1557         release_firmware(ucode_raw);
1558         return;
1559
1560  err_pci_alloc:
1561         IWL_ERR(priv, "failed to allocate pci memory\n");
1562         iwl_dealloc_ucode(priv);
1563  out_unbind:
1564         complete(&priv->_agn.firmware_loading_complete);
1565         device_release_driver(priv->bus.dev);
1566         release_firmware(ucode_raw);
1567 }
1568
1569 static const char *desc_lookup_text[] = {
1570         "OK",
1571         "FAIL",
1572         "BAD_PARAM",
1573         "BAD_CHECKSUM",
1574         "NMI_INTERRUPT_WDG",
1575         "SYSASSERT",
1576         "FATAL_ERROR",
1577         "BAD_COMMAND",
1578         "HW_ERROR_TUNE_LOCK",
1579         "HW_ERROR_TEMPERATURE",
1580         "ILLEGAL_CHAN_FREQ",
1581         "VCC_NOT_STABLE",
1582         "FH_ERROR",
1583         "NMI_INTERRUPT_HOST",
1584         "NMI_INTERRUPT_ACTION_PT",
1585         "NMI_INTERRUPT_UNKNOWN",
1586         "UCODE_VERSION_MISMATCH",
1587         "HW_ERROR_ABS_LOCK",
1588         "HW_ERROR_CAL_LOCK_FAIL",
1589         "NMI_INTERRUPT_INST_ACTION_PT",
1590         "NMI_INTERRUPT_DATA_ACTION_PT",
1591         "NMI_TRM_HW_ER",
1592         "NMI_INTERRUPT_TRM",
1593         "NMI_INTERRUPT_BREAK_POINT"
1594         "DEBUG_0",
1595         "DEBUG_1",
1596         "DEBUG_2",
1597         "DEBUG_3",
1598 };
1599
1600 static struct { char *name; u8 num; } advanced_lookup[] = {
1601         { "NMI_INTERRUPT_WDG", 0x34 },
1602         { "SYSASSERT", 0x35 },
1603         { "UCODE_VERSION_MISMATCH", 0x37 },
1604         { "BAD_COMMAND", 0x38 },
1605         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1606         { "FATAL_ERROR", 0x3D },
1607         { "NMI_TRM_HW_ERR", 0x46 },
1608         { "NMI_INTERRUPT_TRM", 0x4C },
1609         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1610         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1611         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1612         { "NMI_INTERRUPT_HOST", 0x66 },
1613         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1614         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1615         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1616         { "ADVANCED_SYSASSERT", 0 },
1617 };
1618
1619 static const char *desc_lookup(u32 num)
1620 {
1621         int i;
1622         int max = ARRAY_SIZE(desc_lookup_text);
1623
1624         if (num < max)
1625                 return desc_lookup_text[num];
1626
1627         max = ARRAY_SIZE(advanced_lookup) - 1;
1628         for (i = 0; i < max; i++) {
1629                 if (advanced_lookup[i].num == num)
1630                         break;
1631         }
1632         return advanced_lookup[i].name;
1633 }
1634
1635 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1636 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1637
1638 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1639 {
1640         u32 base;
1641         struct iwl_error_event_table table;
1642
1643         base = priv->device_pointers.error_event_table;
1644         if (priv->ucode_type == IWL_UCODE_INIT) {
1645                 if (!base)
1646                         base = priv->_agn.init_errlog_ptr;
1647         } else {
1648                 if (!base)
1649                         base = priv->_agn.inst_errlog_ptr;
1650         }
1651
1652         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1653                 IWL_ERR(priv,
1654                         "Not valid error log pointer 0x%08X for %s uCode\n",
1655                         base,
1656                         (priv->ucode_type == IWL_UCODE_INIT)
1657                                         ? "Init" : "RT");
1658                 return;
1659         }
1660
1661         iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1662
1663         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1664                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1665                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1666                         priv->status, table.valid);
1667         }
1668
1669         priv->isr_stats.err_code = table.error_id;
1670
1671         trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1672                                       table.data1, table.data2, table.line,
1673                                       table.blink1, table.blink2, table.ilink1,
1674                                       table.ilink2, table.bcon_time, table.gp1,
1675                                       table.gp2, table.gp3, table.ucode_ver,
1676                                       table.hw_ver, table.brd_ver);
1677         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1678                 desc_lookup(table.error_id));
1679         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1680         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1681         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1682         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1683         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1684         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1685         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1686         IWL_ERR(priv, "0x%08X | line\n", table.line);
1687         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1688         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1689         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1690         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1691         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1692         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1693         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1694         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1695         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1696         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1697 }
1698
1699 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1700
1701 /**
1702  * iwl_print_event_log - Dump error event log to syslog
1703  *
1704  */
1705 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1706                                u32 num_events, u32 mode,
1707                                int pos, char **buf, size_t bufsz)
1708 {
1709         u32 i;
1710         u32 base;       /* SRAM byte address of event log header */
1711         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1712         u32 ptr;        /* SRAM byte address of log data */
1713         u32 ev, time, data; /* event log data */
1714         unsigned long reg_flags;
1715
1716         if (num_events == 0)
1717                 return pos;
1718
1719         base = priv->device_pointers.log_event_table;
1720         if (priv->ucode_type == IWL_UCODE_INIT) {
1721                 if (!base)
1722                         base = priv->_agn.init_evtlog_ptr;
1723         } else {
1724                 if (!base)
1725                         base = priv->_agn.inst_evtlog_ptr;
1726         }
1727
1728         if (mode == 0)
1729                 event_size = 2 * sizeof(u32);
1730         else
1731                 event_size = 3 * sizeof(u32);
1732
1733         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1734
1735         /* Make sure device is powered up for SRAM reads */
1736         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1737         iwl_grab_nic_access(priv);
1738
1739         /* Set starting address; reads will auto-increment */
1740         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1741         rmb();
1742
1743         /* "time" is actually "data" for mode 0 (no timestamp).
1744         * place event id # at far right for easier visual parsing. */
1745         for (i = 0; i < num_events; i++) {
1746                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1747                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1748                 if (mode == 0) {
1749                         /* data, ev */
1750                         if (bufsz) {
1751                                 pos += scnprintf(*buf + pos, bufsz - pos,
1752                                                 "EVT_LOG:0x%08x:%04u\n",
1753                                                 time, ev);
1754                         } else {
1755                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1756                                         time, ev);
1757                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1758                                         time, ev);
1759                         }
1760                 } else {
1761                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1762                         if (bufsz) {
1763                                 pos += scnprintf(*buf + pos, bufsz - pos,
1764                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1765                                                  time, data, ev);
1766                         } else {
1767                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1768                                         time, data, ev);
1769                                 trace_iwlwifi_dev_ucode_event(priv, time,
1770                                         data, ev);
1771                         }
1772                 }
1773         }
1774
1775         /* Allow device to power down */
1776         iwl_release_nic_access(priv);
1777         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1778         return pos;
1779 }
1780
1781 /**
1782  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1783  */
1784 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1785                                     u32 num_wraps, u32 next_entry,
1786                                     u32 size, u32 mode,
1787                                     int pos, char **buf, size_t bufsz)
1788 {
1789         /*
1790          * display the newest DEFAULT_LOG_ENTRIES entries
1791          * i.e the entries just before the next ont that uCode would fill.
1792          */
1793         if (num_wraps) {
1794                 if (next_entry < size) {
1795                         pos = iwl_print_event_log(priv,
1796                                                 capacity - (size - next_entry),
1797                                                 size - next_entry, mode,
1798                                                 pos, buf, bufsz);
1799                         pos = iwl_print_event_log(priv, 0,
1800                                                   next_entry, mode,
1801                                                   pos, buf, bufsz);
1802                 } else
1803                         pos = iwl_print_event_log(priv, next_entry - size,
1804                                                   size, mode, pos, buf, bufsz);
1805         } else {
1806                 if (next_entry < size) {
1807                         pos = iwl_print_event_log(priv, 0, next_entry,
1808                                                   mode, pos, buf, bufsz);
1809                 } else {
1810                         pos = iwl_print_event_log(priv, next_entry - size,
1811                                                   size, mode, pos, buf, bufsz);
1812                 }
1813         }
1814         return pos;
1815 }
1816
1817 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1818
1819 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1820                             char **buf, bool display)
1821 {
1822         u32 base;       /* SRAM byte address of event log header */
1823         u32 capacity;   /* event log capacity in # entries */
1824         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1825         u32 num_wraps;  /* # times uCode wrapped to top of log */
1826         u32 next_entry; /* index of next entry to be written by uCode */
1827         u32 size;       /* # entries that we'll print */
1828         u32 logsize;
1829         int pos = 0;
1830         size_t bufsz = 0;
1831
1832         base = priv->device_pointers.log_event_table;
1833         if (priv->ucode_type == IWL_UCODE_INIT) {
1834                 logsize = priv->_agn.init_evtlog_size;
1835                 if (!base)
1836                         base = priv->_agn.init_evtlog_ptr;
1837         } else {
1838                 logsize = priv->_agn.inst_evtlog_size;
1839                 if (!base)
1840                         base = priv->_agn.inst_evtlog_ptr;
1841         }
1842
1843         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1844                 IWL_ERR(priv,
1845                         "Invalid event log pointer 0x%08X for %s uCode\n",
1846                         base,
1847                         (priv->ucode_type == IWL_UCODE_INIT)
1848                                         ? "Init" : "RT");
1849                 return -EINVAL;
1850         }
1851
1852         /* event log header */
1853         capacity = iwl_read_targ_mem(priv, base);
1854         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1855         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1856         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1857
1858         if (capacity > logsize) {
1859                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1860                         capacity, logsize);
1861                 capacity = logsize;
1862         }
1863
1864         if (next_entry > logsize) {
1865                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1866                         next_entry, logsize);
1867                 next_entry = logsize;
1868         }
1869
1870         size = num_wraps ? capacity : next_entry;
1871
1872         /* bail out if nothing in log */
1873         if (size == 0) {
1874                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1875                 return pos;
1876         }
1877
1878         /* enable/disable bt channel inhibition */
1879         priv->bt_ch_announce = iwlagn_bt_ch_announce;
1880
1881 #ifdef CONFIG_IWLWIFI_DEBUG
1882         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1883                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1884                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1885 #else
1886         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1887                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1888 #endif
1889         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1890                 size);
1891
1892 #ifdef CONFIG_IWLWIFI_DEBUG
1893         if (display) {
1894                 if (full_log)
1895                         bufsz = capacity * 48;
1896                 else
1897                         bufsz = size * 48;
1898                 *buf = kmalloc(bufsz, GFP_KERNEL);
1899                 if (!*buf)
1900                         return -ENOMEM;
1901         }
1902         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1903                 /*
1904                  * if uCode has wrapped back to top of log,
1905                  * start at the oldest entry,
1906                  * i.e the next one that uCode would fill.
1907                  */
1908                 if (num_wraps)
1909                         pos = iwl_print_event_log(priv, next_entry,
1910                                                 capacity - next_entry, mode,
1911                                                 pos, buf, bufsz);
1912                 /* (then/else) start at top of log */
1913                 pos = iwl_print_event_log(priv, 0,
1914                                           next_entry, mode, pos, buf, bufsz);
1915         } else
1916                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1917                                                 next_entry, size, mode,
1918                                                 pos, buf, bufsz);
1919 #else
1920         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1921                                         next_entry, size, mode,
1922                                         pos, buf, bufsz);
1923 #endif
1924         return pos;
1925 }
1926
1927 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1928 {
1929         struct iwl_ct_kill_config cmd;
1930         struct iwl_ct_kill_throttling_config adv_cmd;
1931         unsigned long flags;
1932         int ret = 0;
1933
1934         spin_lock_irqsave(&priv->lock, flags);
1935         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1936                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1937         spin_unlock_irqrestore(&priv->lock, flags);
1938         priv->thermal_throttle.ct_kill_toggle = false;
1939
1940         if (priv->cfg->base_params->support_ct_kill_exit) {
1941                 adv_cmd.critical_temperature_enter =
1942                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1943                 adv_cmd.critical_temperature_exit =
1944                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1945
1946                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1947                                        sizeof(adv_cmd), &adv_cmd);
1948                 if (ret)
1949                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1950                 else
1951                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1952                                         "succeeded, "
1953                                         "critical temperature enter is %d,"
1954                                         "exit is %d\n",
1955                                        priv->hw_params.ct_kill_threshold,
1956                                        priv->hw_params.ct_kill_exit_threshold);
1957         } else {
1958                 cmd.critical_temperature_R =
1959                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1960
1961                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1962                                        sizeof(cmd), &cmd);
1963                 if (ret)
1964                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1965                 else
1966                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1967                                         "succeeded, "
1968                                         "critical temperature is %d\n",
1969                                         priv->hw_params.ct_kill_threshold);
1970         }
1971 }
1972
1973 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1974 {
1975         struct iwl_calib_cfg_cmd calib_cfg_cmd;
1976         struct iwl_host_cmd cmd = {
1977                 .id = CALIBRATION_CFG_CMD,
1978                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1979                 .data = { &calib_cfg_cmd, },
1980         };
1981
1982         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1983         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1984         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1985
1986         return iwl_send_cmd(priv, &cmd);
1987 }
1988
1989
1990 /**
1991  * iwl_alive_start - called after REPLY_ALIVE notification received
1992  *                   from protocol/runtime uCode (initialization uCode's
1993  *                   Alive gets handled by iwl_init_alive_start()).
1994  */
1995 int iwl_alive_start(struct iwl_priv *priv)
1996 {
1997         int ret = 0;
1998         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1999
2000         iwl_reset_ict(priv);
2001
2002         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2003
2004         /* After the ALIVE response, we can send host commands to the uCode */
2005         set_bit(STATUS_ALIVE, &priv->status);
2006
2007         /* Enable watchdog to monitor the driver tx queues */
2008         iwl_setup_watchdog(priv);
2009
2010         if (iwl_is_rfkill(priv))
2011                 return -ERFKILL;
2012
2013         /* download priority table before any calibration request */
2014         if (priv->cfg->bt_params &&
2015             priv->cfg->bt_params->advanced_bt_coexist) {
2016                 /* Configure Bluetooth device coexistence support */
2017                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2018                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2019                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2020                 priv->cfg->ops->hcmd->send_bt_config(priv);
2021                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2022                 iwlagn_send_prio_tbl(priv);
2023
2024                 /* FIXME: w/a to force change uCode BT state machine */
2025                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2026                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2027                 if (ret)
2028                         return ret;
2029                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2030                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2031                 if (ret)
2032                         return ret;
2033         }
2034         if (priv->hw_params.calib_rt_cfg)
2035                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2036
2037         ieee80211_wake_queues(priv->hw);
2038
2039         priv->active_rate = IWL_RATES_MASK;
2040
2041         /* Configure Tx antenna selection based on H/W config */
2042         if (priv->cfg->ops->hcmd->set_tx_ant)
2043                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2044
2045         if (iwl_is_associated_ctx(ctx)) {
2046                 struct iwl_rxon_cmd *active_rxon =
2047                                 (struct iwl_rxon_cmd *)&ctx->active;
2048                 /* apply any changes in staging */
2049                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2050                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2051         } else {
2052                 struct iwl_rxon_context *tmp;
2053                 /* Initialize our rx_config data */
2054                 for_each_context(priv, tmp)
2055                         iwl_connection_init_rx_config(priv, tmp);
2056
2057                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2058                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2059         }
2060
2061         if (!priv->cfg->bt_params || (priv->cfg->bt_params &&
2062             !priv->cfg->bt_params->advanced_bt_coexist)) {
2063                 /*
2064                  * default is 2-wire BT coexexistence support
2065                  */
2066                 priv->cfg->ops->hcmd->send_bt_config(priv);
2067         }
2068
2069         iwl_reset_run_time_calib(priv);
2070
2071         set_bit(STATUS_READY, &priv->status);
2072
2073         /* Configure the adapter for unassociated operation */
2074         ret = iwlagn_commit_rxon(priv, ctx);
2075         if (ret)
2076                 return ret;
2077
2078         /* At this point, the NIC is initialized and operational */
2079         iwl_rf_kill_ct_config(priv);
2080
2081         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2082
2083         return iwl_power_update_mode(priv, true);
2084 }
2085
2086 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2087
2088 static void __iwl_down(struct iwl_priv *priv)
2089 {
2090         int exit_pending;
2091
2092         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2093
2094         iwl_scan_cancel_timeout(priv, 200);
2095
2096         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2097
2098         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2099          * to prevent rearm timer */
2100         del_timer_sync(&priv->watchdog);
2101
2102         iwl_clear_ucode_stations(priv, NULL);
2103         iwl_dealloc_bcast_stations(priv);
2104         iwl_clear_driver_stations(priv);
2105
2106         /* reset BT coex data */
2107         priv->bt_status = 0;
2108         if (priv->cfg->bt_params)
2109                 priv->bt_traffic_load =
2110                          priv->cfg->bt_params->bt_init_traffic_load;
2111         else
2112                 priv->bt_traffic_load = 0;
2113         priv->bt_full_concurrent = false;
2114         priv->bt_ci_compliance = 0;
2115
2116         /* Wipe out the EXIT_PENDING status bit if we are not actually
2117          * exiting the module */
2118         if (!exit_pending)
2119                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2120
2121         if (priv->mac80211_registered)
2122                 ieee80211_stop_queues(priv->hw);
2123
2124         /* Clear out all status bits but a few that are stable across reset */
2125         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2126                                 STATUS_RF_KILL_HW |
2127                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2128                                 STATUS_GEO_CONFIGURED |
2129                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2130                                 STATUS_FW_ERROR |
2131                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2132                                 STATUS_EXIT_PENDING;
2133
2134         iwlagn_stop_device(priv);
2135
2136         dev_kfree_skb(priv->beacon_skb);
2137         priv->beacon_skb = NULL;
2138 }
2139
2140 static void iwl_down(struct iwl_priv *priv)
2141 {
2142         mutex_lock(&priv->mutex);
2143         __iwl_down(priv);
2144         mutex_unlock(&priv->mutex);
2145
2146         iwl_cancel_deferred_work(priv);
2147 }
2148
2149 #define HW_READY_TIMEOUT (50)
2150
2151 /* Note: returns poll_bit return value, which is >= 0 if success */
2152 static int iwl_set_hw_ready(struct iwl_priv *priv)
2153 {
2154         int ret;
2155
2156         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2157                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2158
2159         /* See if we got it */
2160         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2161                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2162                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2163                                 HW_READY_TIMEOUT);
2164
2165         IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
2166         return ret;
2167 }
2168
2169 /* Note: returns standard 0/-ERROR code */
2170 int iwl_prepare_card_hw(struct iwl_priv *priv)
2171 {
2172         int ret;
2173
2174         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2175
2176         ret = iwl_set_hw_ready(priv);
2177         if (ret >= 0)
2178                 return 0;
2179
2180         /* If HW is not ready, prepare the conditions to check again */
2181         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2182                         CSR_HW_IF_CONFIG_REG_PREPARE);
2183
2184         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2185                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2186                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2187
2188         if (ret < 0)
2189                 return ret;
2190
2191         /* HW should be ready by now, check again. */
2192         ret = iwl_set_hw_ready(priv);
2193         if (ret >= 0)
2194                 return 0;
2195         return ret;
2196 }
2197
2198 #define MAX_HW_RESTARTS 5
2199
2200 static int __iwl_up(struct iwl_priv *priv)
2201 {
2202         struct iwl_rxon_context *ctx;
2203         int ret;
2204
2205         lockdep_assert_held(&priv->mutex);
2206
2207         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2208                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2209                 return -EIO;
2210         }
2211
2212         for_each_context(priv, ctx) {
2213                 ret = iwlagn_alloc_bcast_station(priv, ctx);
2214                 if (ret) {
2215                         iwl_dealloc_bcast_stations(priv);
2216                         return ret;
2217                 }
2218         }
2219
2220         ret = iwlagn_run_init_ucode(priv);
2221         if (ret) {
2222                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
2223                 goto error;
2224         }
2225
2226         ret = iwlagn_load_ucode_wait_alive(priv,
2227                                            &priv->ucode_rt,
2228                                            IWL_UCODE_REGULAR);
2229         if (ret) {
2230                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
2231                 goto error;
2232         }
2233
2234         ret = iwl_alive_start(priv);
2235         if (ret)
2236                 goto error;
2237         return 0;
2238
2239  error:
2240         set_bit(STATUS_EXIT_PENDING, &priv->status);
2241         __iwl_down(priv);
2242         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2243
2244         IWL_ERR(priv, "Unable to initialize device.\n");
2245         return ret;
2246 }
2247
2248
2249 /*****************************************************************************
2250  *
2251  * Workqueue callbacks
2252  *
2253  *****************************************************************************/
2254
2255 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2256 {
2257         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2258                         run_time_calib_work);
2259
2260         mutex_lock(&priv->mutex);
2261
2262         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2263             test_bit(STATUS_SCANNING, &priv->status)) {
2264                 mutex_unlock(&priv->mutex);
2265                 return;
2266         }
2267
2268         if (priv->start_calib) {
2269                 iwl_chain_noise_calibration(priv);
2270                 iwl_sensitivity_calibration(priv);
2271         }
2272
2273         mutex_unlock(&priv->mutex);
2274 }
2275
2276 static void iwlagn_prepare_restart(struct iwl_priv *priv)
2277 {
2278         struct iwl_rxon_context *ctx;
2279         bool bt_full_concurrent;
2280         u8 bt_ci_compliance;
2281         u8 bt_load;
2282         u8 bt_status;
2283
2284         lockdep_assert_held(&priv->mutex);
2285
2286         for_each_context(priv, ctx)
2287                 ctx->vif = NULL;
2288         priv->is_open = 0;
2289
2290         /*
2291          * __iwl_down() will clear the BT status variables,
2292          * which is correct, but when we restart we really
2293          * want to keep them so restore them afterwards.
2294          *
2295          * The restart process will later pick them up and
2296          * re-configure the hw when we reconfigure the BT
2297          * command.
2298          */
2299         bt_full_concurrent = priv->bt_full_concurrent;
2300         bt_ci_compliance = priv->bt_ci_compliance;
2301         bt_load = priv->bt_traffic_load;
2302         bt_status = priv->bt_status;
2303
2304         __iwl_down(priv);
2305
2306         priv->bt_full_concurrent = bt_full_concurrent;
2307         priv->bt_ci_compliance = bt_ci_compliance;
2308         priv->bt_traffic_load = bt_load;
2309         priv->bt_status = bt_status;
2310 }
2311
2312 static void iwl_bg_restart(struct work_struct *data)
2313 {
2314         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2315
2316         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2317                 return;
2318
2319         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2320                 mutex_lock(&priv->mutex);
2321                 iwlagn_prepare_restart(priv);
2322                 mutex_unlock(&priv->mutex);
2323                 iwl_cancel_deferred_work(priv);
2324                 ieee80211_restart_hw(priv->hw);
2325         } else {
2326                 WARN_ON(1);
2327         }
2328 }
2329
2330 static void iwl_bg_rx_replenish(struct work_struct *data)
2331 {
2332         struct iwl_priv *priv =
2333             container_of(data, struct iwl_priv, rx_replenish);
2334
2335         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2336                 return;
2337
2338         mutex_lock(&priv->mutex);
2339         iwlagn_rx_replenish(priv);
2340         mutex_unlock(&priv->mutex);
2341 }
2342
2343 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2344                                  struct ieee80211_channel *chan,
2345                                  enum nl80211_channel_type channel_type,
2346                                  unsigned int wait)
2347 {
2348         struct iwl_priv *priv = hw->priv;
2349         int ret;
2350
2351         /* Not supported if we don't have PAN */
2352         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2353                 ret = -EOPNOTSUPP;
2354                 goto free;
2355         }
2356
2357         /* Not supported on pre-P2P firmware */
2358         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2359                                         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2360                 ret = -EOPNOTSUPP;
2361                 goto free;
2362         }
2363
2364         mutex_lock(&priv->mutex);
2365
2366         if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2367                 /*
2368                  * If the PAN context is free, use the normal
2369                  * way of doing remain-on-channel offload + TX.
2370                  */
2371                 ret = 1;
2372                 goto out;
2373         }
2374
2375         /* TODO: queue up if scanning? */
2376         if (test_bit(STATUS_SCANNING, &priv->status) ||
2377             priv->_agn.offchan_tx_skb) {
2378                 ret = -EBUSY;
2379                 goto out;
2380         }
2381
2382         /*
2383          * max_scan_ie_len doesn't include the blank SSID or the header,
2384          * so need to add that again here.
2385          */
2386         if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2387                 ret = -ENOBUFS;
2388                 goto out;
2389         }
2390
2391         priv->_agn.offchan_tx_skb = skb;
2392         priv->_agn.offchan_tx_timeout = wait;
2393         priv->_agn.offchan_tx_chan = chan;
2394
2395         ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2396                                 IWL_SCAN_OFFCH_TX, chan->band);
2397         if (ret)
2398                 priv->_agn.offchan_tx_skb = NULL;
2399  out:
2400         mutex_unlock(&priv->mutex);
2401  free:
2402         if (ret < 0)
2403                 kfree_skb(skb);
2404
2405         return ret;
2406 }
2407
2408 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2409 {
2410         struct iwl_priv *priv = hw->priv;
2411         int ret;
2412
2413         mutex_lock(&priv->mutex);
2414
2415         if (!priv->_agn.offchan_tx_skb) {
2416                 ret = -EINVAL;
2417                 goto unlock;
2418         }
2419
2420         priv->_agn.offchan_tx_skb = NULL;
2421
2422         ret = iwl_scan_cancel_timeout(priv, 200);
2423         if (ret)
2424                 ret = -EIO;
2425 unlock:
2426         mutex_unlock(&priv->mutex);
2427
2428         return ret;
2429 }
2430
2431 /*****************************************************************************
2432  *
2433  * mac80211 entry point functions
2434  *
2435  *****************************************************************************/
2436
2437 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2438         {
2439                 .max = 1,
2440                 .types = BIT(NL80211_IFTYPE_STATION),
2441         },
2442         {
2443                 .max = 1,
2444                 .types = BIT(NL80211_IFTYPE_AP),
2445         },
2446 };
2447
2448 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2449         {
2450                 .max = 2,
2451                 .types = BIT(NL80211_IFTYPE_STATION),
2452         },
2453 };
2454
2455 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2456         {
2457                 .max = 1,
2458                 .types = BIT(NL80211_IFTYPE_STATION),
2459         },
2460         {
2461                 .max = 1,
2462                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2463                          BIT(NL80211_IFTYPE_AP),
2464         },
2465 };
2466
2467 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2468         {
2469                 .max = 2,
2470                 .types = BIT(NL80211_IFTYPE_STATION),
2471         },
2472         {
2473                 .max = 1,
2474                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2475         },
2476 };
2477
2478 static const struct ieee80211_iface_combination
2479 iwlagn_iface_combinations_dualmode[] = {
2480         { .num_different_channels = 1,
2481           .max_interfaces = 2,
2482           .beacon_int_infra_match = true,
2483           .limits = iwlagn_sta_ap_limits,
2484           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2485         },
2486         { .num_different_channels = 1,
2487           .max_interfaces = 2,
2488           .limits = iwlagn_2sta_limits,
2489           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2490         },
2491 };
2492
2493 static const struct ieee80211_iface_combination
2494 iwlagn_iface_combinations_p2p[] = {
2495         { .num_different_channels = 1,
2496           .max_interfaces = 2,
2497           .beacon_int_infra_match = true,
2498           .limits = iwlagn_p2p_sta_go_limits,
2499           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2500         },
2501         { .num_different_channels = 1,
2502           .max_interfaces = 2,
2503           .limits = iwlagn_p2p_2sta_limits,
2504           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2505         },
2506 };
2507
2508 /*
2509  * Not a mac80211 entry point function, but it fits in with all the
2510  * other mac80211 functions grouped here.
2511  */
2512 static int iwl_mac_setup_register(struct iwl_priv *priv,
2513                                   struct iwlagn_ucode_capabilities *capa)
2514 {
2515         int ret;
2516         struct ieee80211_hw *hw = priv->hw;
2517         struct iwl_rxon_context *ctx;
2518
2519         hw->rate_control_algorithm = "iwl-agn-rs";
2520
2521         /* Tell mac80211 our characteristics */
2522         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2523                     IEEE80211_HW_AMPDU_AGGREGATION |
2524                     IEEE80211_HW_NEED_DTIM_PERIOD |
2525                     IEEE80211_HW_SPECTRUM_MGMT |
2526                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2527
2528         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2529
2530         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2531                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2532
2533         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2534                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2535                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2536
2537         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2538                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2539
2540         hw->sta_data_size = sizeof(struct iwl_station_priv);
2541         hw->vif_data_size = sizeof(struct iwl_vif_priv);
2542
2543         for_each_context(priv, ctx) {
2544                 hw->wiphy->interface_modes |= ctx->interface_modes;
2545                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2546         }
2547
2548         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2549
2550         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2551                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2552                 hw->wiphy->n_iface_combinations =
2553                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2554         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2555                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2556                 hw->wiphy->n_iface_combinations =
2557                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2558         }
2559
2560         hw->wiphy->max_remain_on_channel_duration = 1000;
2561
2562         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2563                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
2564                             WIPHY_FLAG_IBSS_RSN;
2565
2566         if (iwlagn_mod_params.power_save)
2567                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2568         else
2569                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2570
2571         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2572         /* we create the 802.11 header and a zero-length SSID element */
2573         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2574
2575         /* Default value; 4 EDCA QOS priorities */
2576         hw->queues = 4;
2577
2578         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2579
2580         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2581                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2582                         &priv->bands[IEEE80211_BAND_2GHZ];
2583         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2584                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2585                         &priv->bands[IEEE80211_BAND_5GHZ];
2586
2587         iwl_leds_init(priv);
2588
2589         ret = ieee80211_register_hw(priv->hw);
2590         if (ret) {
2591                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2592                 return ret;
2593         }
2594         priv->mac80211_registered = 1;
2595
2596         return 0;
2597 }
2598
2599
2600 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2601 {
2602         struct iwl_priv *priv = hw->priv;
2603         int ret;
2604
2605         IWL_DEBUG_MAC80211(priv, "enter\n");
2606
2607         /* we should be verifying the device is ready to be opened */
2608         mutex_lock(&priv->mutex);
2609         ret = __iwl_up(priv);
2610         mutex_unlock(&priv->mutex);
2611         if (ret)
2612                 return ret;
2613
2614         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2615
2616         /* Now we should be done, and the READY bit should be set. */
2617         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2618                 ret = -EIO;
2619
2620         iwlagn_led_enable(priv);
2621
2622         priv->is_open = 1;
2623         IWL_DEBUG_MAC80211(priv, "leave\n");
2624         return 0;
2625 }
2626
2627 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2628 {
2629         struct iwl_priv *priv = hw->priv;
2630
2631         IWL_DEBUG_MAC80211(priv, "enter\n");
2632
2633         if (!priv->is_open)
2634                 return;
2635
2636         priv->is_open = 0;
2637
2638         iwl_down(priv);
2639
2640         flush_workqueue(priv->workqueue);
2641
2642         /* User space software may expect getting rfkill changes
2643          * even if interface is down */
2644         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2645         iwl_enable_rfkill_int(priv);
2646
2647         IWL_DEBUG_MAC80211(priv, "leave\n");
2648 }
2649
2650 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2651 {
2652         struct iwl_priv *priv = hw->priv;
2653
2654         IWL_DEBUG_MACDUMP(priv, "enter\n");
2655
2656         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2657                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2658
2659         if (iwlagn_tx_skb(priv, skb))
2660                 dev_kfree_skb_any(skb);
2661
2662         IWL_DEBUG_MACDUMP(priv, "leave\n");
2663 }
2664
2665 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2666                                        struct ieee80211_vif *vif,
2667                                        struct ieee80211_key_conf *keyconf,
2668                                        struct ieee80211_sta *sta,
2669                                        u32 iv32, u16 *phase1key)
2670 {
2671         struct iwl_priv *priv = hw->priv;
2672         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2673
2674         IWL_DEBUG_MAC80211(priv, "enter\n");
2675
2676         iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2677                             iv32, phase1key);
2678
2679         IWL_DEBUG_MAC80211(priv, "leave\n");
2680 }
2681
2682 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2683                               struct ieee80211_vif *vif,
2684                               struct ieee80211_sta *sta,
2685                               struct ieee80211_key_conf *key)
2686 {
2687         struct iwl_priv *priv = hw->priv;
2688         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2689         struct iwl_rxon_context *ctx = vif_priv->ctx;
2690         int ret;
2691         u8 sta_id;
2692         bool is_default_wep_key = false;
2693
2694         IWL_DEBUG_MAC80211(priv, "enter\n");
2695
2696         if (iwlagn_mod_params.sw_crypto) {
2697                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2698                 return -EOPNOTSUPP;
2699         }
2700
2701         /*
2702          * To support IBSS RSN, don't program group keys in IBSS, the
2703          * hardware will then not attempt to decrypt the frames.
2704          */
2705         if (vif->type == NL80211_IFTYPE_ADHOC &&
2706             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2707                 return -EOPNOTSUPP;
2708
2709         sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2710         if (sta_id == IWL_INVALID_STATION)
2711                 return -EINVAL;
2712
2713         mutex_lock(&priv->mutex);
2714         iwl_scan_cancel_timeout(priv, 100);
2715
2716         /*
2717          * If we are getting WEP group key and we didn't receive any key mapping
2718          * so far, we are in legacy wep mode (group key only), otherwise we are
2719          * in 1X mode.
2720          * In legacy wep mode, we use another host command to the uCode.
2721          */
2722         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2723              key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2724             !sta) {
2725                 if (cmd == SET_KEY)
2726                         is_default_wep_key = !ctx->key_mapping_keys;
2727                 else
2728                         is_default_wep_key =
2729                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2730         }
2731
2732         switch (cmd) {
2733         case SET_KEY:
2734                 if (is_default_wep_key)
2735                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2736                 else
2737                         ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2738                                                   key, sta_id);
2739
2740                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2741                 break;
2742         case DISABLE_KEY:
2743                 if (is_default_wep_key)
2744                         ret = iwl_remove_default_wep_key(priv, ctx, key);
2745                 else
2746                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2747
2748                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2749                 break;
2750         default:
2751                 ret = -EINVAL;
2752         }
2753
2754         mutex_unlock(&priv->mutex);
2755         IWL_DEBUG_MAC80211(priv, "leave\n");
2756
2757         return ret;
2758 }
2759
2760 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2761                                    struct ieee80211_vif *vif,
2762                                    enum ieee80211_ampdu_mlme_action action,
2763                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2764                                    u8 buf_size)
2765 {
2766         struct iwl_priv *priv = hw->priv;
2767         int ret = -EINVAL;
2768         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2769
2770         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2771                      sta->addr, tid);
2772
2773         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2774                 return -EACCES;
2775
2776         mutex_lock(&priv->mutex);
2777
2778         switch (action) {
2779         case IEEE80211_AMPDU_RX_START:
2780                 IWL_DEBUG_HT(priv, "start Rx\n");
2781                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2782                 break;
2783         case IEEE80211_AMPDU_RX_STOP:
2784                 IWL_DEBUG_HT(priv, "stop Rx\n");
2785                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2786                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2787                         ret = 0;
2788                 break;
2789         case IEEE80211_AMPDU_TX_START:
2790                 IWL_DEBUG_HT(priv, "start Tx\n");
2791                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2792                 if (ret == 0) {
2793                         priv->_agn.agg_tids_count++;
2794                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2795                                      priv->_agn.agg_tids_count);
2796                 }
2797                 break;
2798         case IEEE80211_AMPDU_TX_STOP:
2799                 IWL_DEBUG_HT(priv, "stop Tx\n");
2800                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2801                 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2802                         priv->_agn.agg_tids_count--;
2803                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2804                                      priv->_agn.agg_tids_count);
2805                 }
2806                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2807                         ret = 0;
2808                 if (priv->cfg->ht_params &&
2809                     priv->cfg->ht_params->use_rts_for_aggregation) {
2810                         /*
2811                          * switch off RTS/CTS if it was previously enabled
2812                          */
2813                         sta_priv->lq_sta.lq.general_params.flags &=
2814                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2815                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2816                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2817                 }
2818                 break;
2819         case IEEE80211_AMPDU_TX_OPERATIONAL:
2820                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2821
2822                 iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
2823
2824                 /*
2825                  * If the limit is 0, then it wasn't initialised yet,
2826                  * use the default. We can do that since we take the
2827                  * minimum below, and we don't want to go above our
2828                  * default due to hardware restrictions.
2829                  */
2830                 if (sta_priv->max_agg_bufsize == 0)
2831                         sta_priv->max_agg_bufsize =
2832                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2833
2834                 /*
2835                  * Even though in theory the peer could have different
2836                  * aggregation reorder buffer sizes for different sessions,
2837                  * our ucode doesn't allow for that and has a global limit
2838                  * for each station. Therefore, use the minimum of all the
2839                  * aggregation sessions and our default value.
2840                  */
2841                 sta_priv->max_agg_bufsize =
2842                         min(sta_priv->max_agg_bufsize, buf_size);
2843
2844                 if (priv->cfg->ht_params &&
2845                     priv->cfg->ht_params->use_rts_for_aggregation) {
2846                         /*
2847                          * switch to RTS/CTS if it is the prefer protection
2848                          * method for HT traffic
2849                          */
2850
2851                         sta_priv->lq_sta.lq.general_params.flags |=
2852                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2853                 }
2854
2855                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2856                         sta_priv->max_agg_bufsize;
2857
2858                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2859                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2860
2861                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2862                          sta->addr, tid);
2863                 ret = 0;
2864                 break;
2865         }
2866         mutex_unlock(&priv->mutex);
2867
2868         return ret;
2869 }
2870
2871 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2872                               struct ieee80211_vif *vif,
2873                               struct ieee80211_sta *sta)
2874 {
2875         struct iwl_priv *priv = hw->priv;
2876         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2877         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2878         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2879         int ret;
2880         u8 sta_id;
2881
2882         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2883                         sta->addr);
2884         mutex_lock(&priv->mutex);
2885         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2886                         sta->addr);
2887         sta_priv->common.sta_id = IWL_INVALID_STATION;
2888
2889         atomic_set(&sta_priv->pending_frames, 0);
2890         if (vif->type == NL80211_IFTYPE_AP)
2891                 sta_priv->client = true;
2892
2893         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2894                                      is_ap, sta, &sta_id);
2895         if (ret) {
2896                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2897                         sta->addr, ret);
2898                 /* Should we return success if return code is EEXIST ? */
2899                 mutex_unlock(&priv->mutex);
2900                 return ret;
2901         }
2902
2903         sta_priv->common.sta_id = sta_id;
2904
2905         /* Initialize rate scaling */
2906         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2907                        sta->addr);
2908         iwl_rs_rate_init(priv, sta, sta_id);
2909         mutex_unlock(&priv->mutex);
2910
2911         return 0;
2912 }
2913
2914 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2915                                 struct ieee80211_channel_switch *ch_switch)
2916 {
2917         struct iwl_priv *priv = hw->priv;
2918         const struct iwl_channel_info *ch_info;
2919         struct ieee80211_conf *conf = &hw->conf;
2920         struct ieee80211_channel *channel = ch_switch->channel;
2921         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2922         /*
2923          * MULTI-FIXME
2924          * When we add support for multiple interfaces, we need to
2925          * revisit this. The channel switch command in the device
2926          * only affects the BSS context, but what does that really
2927          * mean? And what if we get a CSA on the second interface?
2928          * This needs a lot of work.
2929          */
2930         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2931         u16 ch;
2932
2933         IWL_DEBUG_MAC80211(priv, "enter\n");
2934
2935         mutex_lock(&priv->mutex);
2936
2937         if (iwl_is_rfkill(priv))
2938                 goto out;
2939
2940         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2941             test_bit(STATUS_SCANNING, &priv->status) ||
2942             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2943                 goto out;
2944
2945         if (!iwl_is_associated_ctx(ctx))
2946                 goto out;
2947
2948         if (!priv->cfg->ops->lib->set_channel_switch)
2949                 goto out;
2950
2951         ch = channel->hw_value;
2952         if (le16_to_cpu(ctx->active.channel) == ch)
2953                 goto out;
2954
2955         ch_info = iwl_get_channel_info(priv, channel->band, ch);
2956         if (!is_channel_valid(ch_info)) {
2957                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2958                 goto out;
2959         }
2960
2961         spin_lock_irq(&priv->lock);
2962
2963         priv->current_ht_config.smps = conf->smps_mode;
2964
2965         /* Configure HT40 channels */
2966         ctx->ht.enabled = conf_is_ht(conf);
2967         if (ctx->ht.enabled) {
2968                 if (conf_is_ht40_minus(conf)) {
2969                         ctx->ht.extension_chan_offset =
2970                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2971                         ctx->ht.is_40mhz = true;
2972                 } else if (conf_is_ht40_plus(conf)) {
2973                         ctx->ht.extension_chan_offset =
2974                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2975                         ctx->ht.is_40mhz = true;
2976                 } else {
2977                         ctx->ht.extension_chan_offset =
2978                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2979                         ctx->ht.is_40mhz = false;
2980                 }
2981         } else
2982                 ctx->ht.is_40mhz = false;
2983
2984         if ((le16_to_cpu(ctx->staging.channel) != ch))
2985                 ctx->staging.flags = 0;
2986
2987         iwl_set_rxon_channel(priv, channel, ctx);
2988         iwl_set_rxon_ht(priv, ht_conf);
2989         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2990
2991         spin_unlock_irq(&priv->lock);
2992
2993         iwl_set_rate(priv);
2994         /*
2995          * at this point, staging_rxon has the
2996          * configuration for channel switch
2997          */
2998         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2999         priv->switch_channel = cpu_to_le16(ch);
3000         if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
3001                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
3002                 priv->switch_channel = 0;
3003                 ieee80211_chswitch_done(ctx->vif, false);
3004         }
3005
3006 out:
3007         mutex_unlock(&priv->mutex);
3008         IWL_DEBUG_MAC80211(priv, "leave\n");
3009 }
3010
3011 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
3012                                     unsigned int changed_flags,
3013                                     unsigned int *total_flags,
3014                                     u64 multicast)
3015 {
3016         struct iwl_priv *priv = hw->priv;
3017         __le32 filter_or = 0, filter_nand = 0;
3018         struct iwl_rxon_context *ctx;
3019
3020 #define CHK(test, flag) do { \
3021         if (*total_flags & (test))              \
3022                 filter_or |= (flag);            \
3023         else                                    \
3024                 filter_nand |= (flag);          \
3025         } while (0)
3026
3027         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3028                         changed_flags, *total_flags);
3029
3030         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3031         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3032         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3033         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3034
3035 #undef CHK
3036
3037         mutex_lock(&priv->mutex);
3038
3039         for_each_context(priv, ctx) {
3040                 ctx->staging.filter_flags &= ~filter_nand;
3041                 ctx->staging.filter_flags |= filter_or;
3042
3043                 /*
3044                  * Not committing directly because hardware can perform a scan,
3045                  * but we'll eventually commit the filter flags change anyway.
3046                  */
3047         }
3048
3049         mutex_unlock(&priv->mutex);
3050
3051         /*
3052          * Receiving all multicast frames is always enabled by the
3053          * default flags setup in iwl_connection_init_rx_config()
3054          * since we currently do not support programming multicast
3055          * filters into the device.
3056          */
3057         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3058                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3059 }
3060
3061 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3062 {
3063         struct iwl_priv *priv = hw->priv;
3064
3065         mutex_lock(&priv->mutex);
3066         IWL_DEBUG_MAC80211(priv, "enter\n");
3067
3068         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3069                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3070                 goto done;
3071         }
3072         if (iwl_is_rfkill(priv)) {
3073                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3074                 goto done;
3075         }
3076
3077         /*
3078          * mac80211 will not push any more frames for transmit
3079          * until the flush is completed
3080          */
3081         if (drop) {
3082                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3083                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3084                         IWL_ERR(priv, "flush request fail\n");
3085                         goto done;
3086                 }
3087         }
3088         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3089         iwlagn_wait_tx_queue_empty(priv);
3090 done:
3091         mutex_unlock(&priv->mutex);
3092         IWL_DEBUG_MAC80211(priv, "leave\n");
3093 }
3094
3095 static void iwlagn_disable_roc(struct iwl_priv *priv)
3096 {
3097         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3098         struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3099
3100         lockdep_assert_held(&priv->mutex);
3101
3102         if (!ctx->is_active)
3103                 return;
3104
3105         ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3106         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3107         iwl_set_rxon_channel(priv, chan, ctx);
3108         iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3109
3110         priv->_agn.hw_roc_channel = NULL;
3111
3112         iwlagn_commit_rxon(priv, ctx);
3113
3114         ctx->is_active = false;
3115 }
3116
3117 static void iwlagn_bg_roc_done(struct work_struct *work)
3118 {
3119         struct iwl_priv *priv = container_of(work, struct iwl_priv,
3120                                              _agn.hw_roc_work.work);
3121
3122         mutex_lock(&priv->mutex);
3123         ieee80211_remain_on_channel_expired(priv->hw);
3124         iwlagn_disable_roc(priv);
3125         mutex_unlock(&priv->mutex);
3126 }
3127
3128 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3129                                      struct ieee80211_channel *channel,
3130                                      enum nl80211_channel_type channel_type,
3131                                      int duration)
3132 {
3133         struct iwl_priv *priv = hw->priv;
3134         int err = 0;
3135
3136         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3137                 return -EOPNOTSUPP;
3138
3139         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3140                                         BIT(NL80211_IFTYPE_P2P_CLIENT)))
3141                 return -EOPNOTSUPP;
3142
3143         mutex_lock(&priv->mutex);
3144
3145         if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3146             test_bit(STATUS_SCAN_HW, &priv->status)) {
3147                 err = -EBUSY;
3148                 goto out;
3149         }
3150
3151         priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3152         priv->_agn.hw_roc_channel = channel;
3153         priv->_agn.hw_roc_chantype = channel_type;
3154         priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3155         iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3156         queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
3157                            msecs_to_jiffies(duration + 20));
3158
3159         msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3160         ieee80211_ready_on_channel(priv->hw);
3161
3162  out:
3163         mutex_unlock(&priv->mutex);
3164
3165         return err;
3166 }
3167
3168 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3169 {
3170         struct iwl_priv *priv = hw->priv;
3171
3172         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3173                 return -EOPNOTSUPP;
3174
3175         cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
3176
3177         mutex_lock(&priv->mutex);
3178         iwlagn_disable_roc(priv);
3179         mutex_unlock(&priv->mutex);
3180
3181         return 0;
3182 }
3183
3184 /*****************************************************************************
3185  *
3186  * driver setup and teardown
3187  *
3188  *****************************************************************************/
3189
3190 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3191 {
3192         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3193
3194         init_waitqueue_head(&priv->wait_command_queue);
3195
3196         INIT_WORK(&priv->restart, iwl_bg_restart);
3197         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3198         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3199         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3200         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3201         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3202         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3203         INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
3204
3205         iwl_setup_scan_deferred_work(priv);
3206
3207         if (priv->cfg->ops->lib->setup_deferred_work)
3208                 priv->cfg->ops->lib->setup_deferred_work(priv);
3209
3210         init_timer(&priv->statistics_periodic);
3211         priv->statistics_periodic.data = (unsigned long)priv;
3212         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3213
3214         init_timer(&priv->ucode_trace);
3215         priv->ucode_trace.data = (unsigned long)priv;
3216         priv->ucode_trace.function = iwl_bg_ucode_trace;
3217
3218         init_timer(&priv->watchdog);
3219         priv->watchdog.data = (unsigned long)priv;
3220         priv->watchdog.function = iwl_bg_watchdog;
3221
3222         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3223                 iwl_irq_tasklet, (unsigned long)priv);
3224 }
3225
3226 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3227 {
3228         if (priv->cfg->ops->lib->cancel_deferred_work)
3229                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3230
3231         cancel_work_sync(&priv->run_time_calib_work);
3232         cancel_work_sync(&priv->beacon_update);
3233
3234         iwl_cancel_scan_deferred_work(priv);
3235
3236         cancel_work_sync(&priv->bt_full_concurrency);
3237         cancel_work_sync(&priv->bt_runtime_config);
3238
3239         del_timer_sync(&priv->statistics_periodic);
3240         del_timer_sync(&priv->ucode_trace);
3241 }
3242
3243 static void iwl_init_hw_rates(struct iwl_priv *priv,
3244                               struct ieee80211_rate *rates)
3245 {
3246         int i;
3247
3248         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3249                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3250                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3251                 rates[i].hw_value_short = i;
3252                 rates[i].flags = 0;
3253                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3254                         /*
3255                          * If CCK != 1M then set short preamble rate flag.
3256                          */
3257                         rates[i].flags |=
3258                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3259                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3260                 }
3261         }
3262 }
3263
3264 static int iwl_init_drv(struct iwl_priv *priv)
3265 {
3266         int ret;
3267
3268         spin_lock_init(&priv->sta_lock);
3269         spin_lock_init(&priv->hcmd_lock);
3270
3271         mutex_init(&priv->mutex);
3272
3273         priv->ieee_channels = NULL;
3274         priv->ieee_rates = NULL;
3275         priv->band = IEEE80211_BAND_2GHZ;
3276
3277         priv->iw_mode = NL80211_IFTYPE_STATION;
3278         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3279         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3280         priv->_agn.agg_tids_count = 0;
3281
3282         /* initialize force reset */
3283         priv->force_reset[IWL_RF_RESET].reset_duration =
3284                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3285         priv->force_reset[IWL_FW_RESET].reset_duration =
3286                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3287
3288         priv->rx_statistics_jiffies = jiffies;
3289
3290         /* Choose which receivers/antennas to use */
3291         if (priv->cfg->ops->hcmd->set_rxon_chain)
3292                 priv->cfg->ops->hcmd->set_rxon_chain(priv,
3293                                         &priv->contexts[IWL_RXON_CTX_BSS]);
3294
3295         iwl_init_scan_params(priv);
3296
3297         /* init bt coex */
3298         if (priv->cfg->bt_params &&
3299             priv->cfg->bt_params->advanced_bt_coexist) {
3300                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3301                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3302                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3303                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3304                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3305                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3306         }
3307
3308         ret = iwl_init_channel_map(priv);
3309         if (ret) {
3310                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3311                 goto err;
3312         }
3313
3314         ret = iwlcore_init_geos(priv);
3315         if (ret) {
3316                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3317                 goto err_free_channel_map;
3318         }
3319         iwl_init_hw_rates(priv, priv->ieee_rates);
3320
3321         return 0;
3322
3323 err_free_channel_map:
3324         iwl_free_channel_map(priv);
3325 err:
3326         return ret;
3327 }
3328
3329 static void iwl_uninit_drv(struct iwl_priv *priv)
3330 {
3331         iwl_calib_free_results(priv);
3332         iwlcore_free_geos(priv);
3333         iwl_free_channel_map(priv);
3334         kfree(priv->scan_cmd);
3335         kfree(priv->beacon_cmd);
3336 }
3337
3338 struct ieee80211_ops iwlagn_hw_ops = {
3339         .tx = iwlagn_mac_tx,
3340         .start = iwlagn_mac_start,
3341         .stop = iwlagn_mac_stop,
3342         .add_interface = iwl_mac_add_interface,
3343         .remove_interface = iwl_mac_remove_interface,
3344         .change_interface = iwl_mac_change_interface,
3345         .config = iwlagn_mac_config,
3346         .configure_filter = iwlagn_configure_filter,
3347         .set_key = iwlagn_mac_set_key,
3348         .update_tkip_key = iwlagn_mac_update_tkip_key,
3349         .conf_tx = iwl_mac_conf_tx,
3350         .bss_info_changed = iwlagn_bss_info_changed,
3351         .ampdu_action = iwlagn_mac_ampdu_action,
3352         .hw_scan = iwl_mac_hw_scan,
3353         .sta_notify = iwlagn_mac_sta_notify,
3354         .sta_add = iwlagn_mac_sta_add,
3355         .sta_remove = iwl_mac_sta_remove,
3356         .channel_switch = iwlagn_mac_channel_switch,
3357         .flush = iwlagn_mac_flush,
3358         .tx_last_beacon = iwl_mac_tx_last_beacon,
3359         .remain_on_channel = iwl_mac_remain_on_channel,
3360         .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3361         .offchannel_tx = iwl_mac_offchannel_tx,
3362         .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3363         CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3364         CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3365 };
3366
3367 static u32 iwl_hw_detect(struct iwl_priv *priv)
3368 {
3369         return iwl_read32(priv, CSR_HW_REV);
3370 }
3371
3372 static int iwl_set_hw_params(struct iwl_priv *priv)
3373 {
3374         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3375         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3376         if (iwlagn_mod_params.amsdu_size_8K)
3377                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3378         else
3379                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3380
3381         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3382
3383         if (iwlagn_mod_params.disable_11n)
3384                 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3385
3386         /* Device-specific setup */
3387         return priv->cfg->ops->lib->set_hw_params(priv);
3388 }
3389
3390 static const u8 iwlagn_bss_ac_to_fifo[] = {
3391         IWL_TX_FIFO_VO,
3392         IWL_TX_FIFO_VI,
3393         IWL_TX_FIFO_BE,
3394         IWL_TX_FIFO_BK,
3395 };
3396
3397 static const u8 iwlagn_bss_ac_to_queue[] = {
3398         0, 1, 2, 3,
3399 };
3400
3401 static const u8 iwlagn_pan_ac_to_fifo[] = {
3402         IWL_TX_FIFO_VO_IPAN,
3403         IWL_TX_FIFO_VI_IPAN,
3404         IWL_TX_FIFO_BE_IPAN,
3405         IWL_TX_FIFO_BK_IPAN,
3406 };
3407
3408 static const u8 iwlagn_pan_ac_to_queue[] = {
3409         7, 6, 5, 4,
3410 };
3411
3412 /* This function both allocates and initializes hw and priv. */
3413 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3414 {
3415         struct iwl_priv *priv;
3416         /* mac80211 allocates memory for this device instance, including
3417          *   space for this driver's private structure */
3418         struct ieee80211_hw *hw;
3419
3420         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3421         if (hw == NULL) {
3422                 pr_err("%s: Can not allocate network device\n",
3423                        cfg->name);
3424                 goto out;
3425         }
3426
3427         priv = hw->priv;
3428         priv->hw = hw;
3429
3430 out:
3431         return hw;
3432 }
3433
3434 static void iwl_init_context(struct iwl_priv *priv)
3435 {
3436         int i;
3437
3438         /*
3439          * The default context is always valid,
3440          * more may be discovered when firmware
3441          * is loaded.
3442          */
3443         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3444
3445         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3446                 priv->contexts[i].ctxid = i;
3447
3448         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3449         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3450         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3451         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3452         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3453         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3454         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3455         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3456         priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3457         priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3458         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3459                 BIT(NL80211_IFTYPE_ADHOC);
3460         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3461                 BIT(NL80211_IFTYPE_STATION);
3462         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3463         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3464         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3465         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3466
3467         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3468         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3469                 REPLY_WIPAN_RXON_TIMING;
3470         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3471                 REPLY_WIPAN_RXON_ASSOC;
3472         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3473         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3474         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3475         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3476         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3477         priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3478         priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3479         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3480         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3481                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3482 #ifdef CONFIG_IWL_P2P
3483         priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3484                 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3485 #endif
3486         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3487         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3488         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3489
3490         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3491 }
3492
3493 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3494                 struct iwl_cfg *cfg)
3495 {
3496         int err = 0;
3497         struct iwl_priv *priv;
3498         struct ieee80211_hw *hw;
3499         u16 num_mac;
3500         u32 hw_rev;
3501
3502         /************************
3503          * 1. Allocating HW data
3504          ************************/
3505         hw = iwl_alloc_all(cfg);
3506         if (!hw) {
3507                 err = -ENOMEM;
3508                 goto out;
3509         }
3510
3511         priv = hw->priv;
3512
3513         priv->bus.priv = priv;
3514         priv->bus.bus_specific = bus_specific;
3515         priv->bus.ops = bus_ops;
3516         priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
3517         priv->bus.ops->set_drv_data(&priv->bus, priv);
3518         priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3519
3520         /* At this point both hw and priv are allocated. */
3521
3522         SET_IEEE80211_DEV(hw, priv->bus.dev);
3523
3524         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3525         priv->cfg = cfg;
3526         priv->inta_mask = CSR_INI_SET_MASK;
3527
3528         /* is antenna coupling more than 35dB ? */
3529         priv->bt_ant_couple_ok =
3530                 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3531                 true : false;
3532
3533         /* enable/disable bt channel inhibition */
3534         priv->bt_ch_announce = iwlagn_bt_ch_announce;
3535         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3536                        (priv->bt_ch_announce) ? "On" : "Off");
3537
3538         if (iwl_alloc_traffic_mem(priv))
3539                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3540
3541
3542         /* these spin locks will be used in apm_ops.init and EEPROM access
3543          * we should init now
3544          */
3545         spin_lock_init(&priv->reg_lock);
3546         spin_lock_init(&priv->lock);
3547
3548         /*
3549          * stop and reset the on-board processor just in case it is in a
3550          * strange state ... like being left stranded by a primary kernel
3551          * and this is now the kdump kernel trying to start up
3552          */
3553         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3554
3555         /***********************
3556          * 3. Read REV register
3557          ***********************/
3558         hw_rev = iwl_hw_detect(priv);
3559         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3560                 priv->cfg->name, hw_rev);
3561
3562         if (iwl_prepare_card_hw(priv)) {
3563                 err = -EIO;
3564                 IWL_WARN(priv, "Failed, HW not ready\n");
3565                 goto out_free_traffic_mem;
3566         }
3567
3568         /*****************
3569          * 4. Read EEPROM
3570          *****************/
3571         /* Read the EEPROM */
3572         err = iwl_eeprom_init(priv, hw_rev);
3573         if (err) {
3574                 IWL_ERR(priv, "Unable to init EEPROM\n");
3575                 goto out_free_traffic_mem;
3576         }
3577         err = iwl_eeprom_check_version(priv);
3578         if (err)
3579                 goto out_free_eeprom;
3580
3581         err = iwl_eeprom_check_sku(priv);
3582         if (err)
3583                 goto out_free_eeprom;
3584
3585         /* extract MAC Address */
3586         iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3587         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3588         priv->hw->wiphy->addresses = priv->addresses;
3589         priv->hw->wiphy->n_addresses = 1;
3590         num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3591         if (num_mac > 1) {
3592                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3593                        ETH_ALEN);
3594                 priv->addresses[1].addr[5]++;
3595                 priv->hw->wiphy->n_addresses++;
3596         }
3597
3598         /* initialize all valid contexts */
3599         iwl_init_context(priv);
3600
3601         /************************
3602          * 5. Setup HW constants
3603          ************************/
3604         if (iwl_set_hw_params(priv)) {
3605                 err = -ENOENT;
3606                 IWL_ERR(priv, "failed to set hw parameters\n");
3607                 goto out_free_eeprom;
3608         }
3609
3610         /*******************
3611          * 6. Setup priv
3612          *******************/
3613
3614         err = iwl_init_drv(priv);
3615         if (err)
3616                 goto out_free_eeprom;
3617         /* At this point both hw and priv are initialized. */
3618
3619         /********************
3620          * 7. Setup services
3621          ********************/
3622         iwl_alloc_isr_ict(priv);
3623
3624         err = request_irq(priv->bus.irq, iwl_isr_ict, IRQF_SHARED,
3625                           DRV_NAME, priv);
3626         if (err) {
3627                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus.irq);
3628                 goto out_uninit_drv;
3629         }
3630
3631         iwl_setup_deferred_work(priv);
3632         iwl_setup_rx_handlers(priv);
3633         iwl_testmode_init(priv);
3634
3635         /*********************************************
3636          * 8. Enable interrupts
3637          *********************************************/
3638
3639         iwl_enable_rfkill_int(priv);
3640
3641         /* If platform's RF_KILL switch is NOT set to KILL */
3642         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3643                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3644         else
3645                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3646
3647         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3648                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3649
3650         iwl_power_initialize(priv);
3651         iwl_tt_initialize(priv);
3652
3653         init_completion(&priv->_agn.firmware_loading_complete);
3654
3655         err = iwl_request_firmware(priv, true);
3656         if (err)
3657                 goto out_destroy_workqueue;
3658
3659         return 0;
3660
3661  out_destroy_workqueue:
3662         destroy_workqueue(priv->workqueue);
3663         priv->workqueue = NULL;
3664         free_irq(priv->bus.irq, priv);
3665         iwl_free_isr_ict(priv);
3666  out_uninit_drv:
3667         iwl_uninit_drv(priv);
3668  out_free_eeprom:
3669         iwl_eeprom_free(priv);
3670  out_free_traffic_mem:
3671         iwl_free_traffic_mem(priv);
3672         ieee80211_free_hw(priv->hw);
3673  out:
3674         return err;
3675 }
3676
3677 void __devexit iwl_remove(struct iwl_priv * priv)
3678 {
3679         unsigned long flags;
3680
3681         wait_for_completion(&priv->_agn.firmware_loading_complete);
3682
3683         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3684
3685         iwl_dbgfs_unregister(priv);
3686         sysfs_remove_group(&priv->bus.dev->kobj,
3687                            &iwl_attribute_group);
3688
3689         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3690          * to be called and iwl_down since we are removing the device
3691          * we need to set STATUS_EXIT_PENDING bit.
3692          */
3693         set_bit(STATUS_EXIT_PENDING, &priv->status);
3694
3695         iwl_testmode_cleanup(priv);
3696         iwl_leds_exit(priv);
3697
3698         if (priv->mac80211_registered) {
3699                 ieee80211_unregister_hw(priv->hw);
3700                 priv->mac80211_registered = 0;
3701         }
3702
3703         /* Reset to low power before unloading driver. */
3704         iwl_apm_stop(priv);
3705
3706         iwl_tt_exit(priv);
3707
3708         /* make sure we flush any pending irq or
3709          * tasklet for the driver
3710          */
3711         spin_lock_irqsave(&priv->lock, flags);
3712         iwl_disable_interrupts(priv);
3713         spin_unlock_irqrestore(&priv->lock, flags);
3714
3715         iwl_synchronize_irq(priv);
3716
3717         iwl_dealloc_ucode(priv);
3718
3719         if (priv->rxq.bd)
3720                 iwlagn_rx_queue_free(priv, &priv->rxq);
3721         iwlagn_hw_txq_ctx_free(priv);
3722
3723         iwl_eeprom_free(priv);
3724
3725
3726         /*netif_stop_queue(dev); */
3727         flush_workqueue(priv->workqueue);
3728
3729         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3730          * priv->workqueue... so we can't take down the workqueue
3731          * until now... */
3732         destroy_workqueue(priv->workqueue);
3733         priv->workqueue = NULL;
3734         iwl_free_traffic_mem(priv);
3735
3736         free_irq(priv->bus.irq, priv);
3737         priv->bus.ops->set_drv_data(&priv->bus, NULL);
3738
3739         iwl_uninit_drv(priv);
3740
3741         iwl_free_isr_ict(priv);
3742
3743         dev_kfree_skb(priv->beacon_skb);
3744
3745         ieee80211_free_hw(priv->hw);
3746 }
3747
3748
3749 /*****************************************************************************
3750  *
3751  * driver and module entry point
3752  *
3753  *****************************************************************************/
3754 static int __init iwl_init(void)
3755 {
3756
3757         int ret;
3758         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3759         pr_info(DRV_COPYRIGHT "\n");
3760
3761         ret = iwlagn_rate_control_register();
3762         if (ret) {
3763                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3764                 return ret;
3765         }
3766
3767         ret = iwl_pci_register_driver();
3768
3769         if (ret)
3770                 goto error_register;
3771         return ret;
3772
3773 error_register:
3774         iwlagn_rate_control_unregister();
3775         return ret;
3776 }
3777
3778 static void __exit iwl_exit(void)
3779 {
3780         iwl_pci_unregister_driver();
3781         iwlagn_rate_control_unregister();
3782 }
3783
3784 module_exit(iwl_exit);
3785 module_init(iwl_init);
3786
3787 #ifdef CONFIG_IWLWIFI_DEBUG
3788 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3789 MODULE_PARM_DESC(debug, "debug output mask");
3790 #endif
3791
3792 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3793 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3794 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3795 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3796 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3797 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3798 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3799                    int, S_IRUGO);
3800 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3801 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3802 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3803
3804 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3805                    S_IRUGO);
3806 MODULE_PARM_DESC(ucode_alternative,
3807                  "specify ucode alternative to use from ucode file");
3808
3809 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3810 MODULE_PARM_DESC(antenna_coupling,
3811                  "specify antenna coupling in dB (defualt: 0 dB)");
3812
3813 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3814 MODULE_PARM_DESC(bt_ch_inhibition,
3815                  "Disable BT channel inhibition (default: enable)");
3816
3817 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3818 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3819
3820 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3821 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3822
3823 /*
3824  * set bt_coex_active to true, uCode will do kill/defer
3825  * every time the priority line is asserted (BT is sending signals on the
3826  * priority line in the PCIx).
3827  * set bt_coex_active to false, uCode will ignore the BT activity and
3828  * perform the normal operation
3829  *
3830  * User might experience transmit issue on some platform due to WiFi/BT
3831  * co-exist problem. The possible behaviors are:
3832  *   Able to scan and finding all the available AP
3833  *   Not able to associate with any AP
3834  * On those platforms, WiFi communication can be restored by set
3835  * "bt_coex_active" module parameter to "false"
3836  *
3837  * default: bt_coex_active = true (BT_COEX_ENABLE)
3838  */
3839 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3840                 bool, S_IRUGO);
3841 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3842
3843 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3844 MODULE_PARM_DESC(led_mode, "0=system default, "
3845                 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3846
3847 module_param_named(power_save, iwlagn_mod_params.power_save,
3848                 bool, S_IRUGO);
3849 MODULE_PARM_DESC(power_save,
3850                  "enable WiFi power management (default: disable)");
3851
3852 module_param_named(power_level, iwlagn_mod_params.power_level,
3853                 int, S_IRUGO);
3854 MODULE_PARM_DESC(power_level,
3855                  "default power save level (range from 1 - 5, default: 1)");
3856
3857 /*
3858  * For now, keep using power level 1 instead of automatically
3859  * adjusting ...
3860  */
3861 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3862                 bool, S_IRUGO);
3863 MODULE_PARM_DESC(no_sleep_autoadjust,
3864                  "don't automatically adjust sleep level "
3865                  "according to maximum network latency (default: true)");