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