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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/slab.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/delay.h>
  38 #include <linux/sched.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/wireless.h>
  42 #include <linux/firmware.h>
  43 #include <linux/etherdevice.h>
  44 #include <linux/if_arp.h>
  45
  46 #include <net/mac80211.h>
  47
  48 #include <asm/div64.h>
  49
  50 #include "iwl-eeprom.h"
  51 #include "iwl-dev.h"
  52 #include "iwl-core.h"
  53 #include "iwl-io.h"
  54 #include "iwl-helpers.h"
  55 #include "iwl-sta.h"
  56 #include "iwl-agn-calib.h"
  57 #include "iwl-agn.h"
  58 #include "iwl-pci.h"
  59
  60
  61 /******************************************************************************
  62  *
  63  * module boiler plate
  64  *
  65  ******************************************************************************/
  66
  67 /*
  68  * module name, copyright, version, etc.
  69  */
  70 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 #define DRV_VERSION     IWLWIFI_VERSION VD
  79
  80
  81 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  82 MODULE_VERSION(DRV_VERSION);
  83 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  84 MODULE_LICENSE("GPL");
  85
  86 static int iwlagn_ant_coupling;
  87 static bool iwlagn_bt_ch_announce = 1;
  88
  89 void iwl_update_chain_flags(struct iwl_priv *priv)
  90 {
  91         struct iwl_rxon_context *ctx;
  92
  93         if (priv->cfg->ops->hcmd->set_rxon_chain) {
  94                 for_each_context(priv, ctx) {
  95                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
  96                         if (ctx->active.rx_chain != ctx->staging.rx_chain)
  97                                 iwlagn_commit_rxon(priv, ctx);
  98                 }
  99         }
 100 }
 101
 102 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 103 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 104                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 105                                u8 *beacon, u32 frame_size)
 106 {
 107         u16 tim_idx;
 108         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 109
 110         /*
 111          * The index is relative to frame start but we start looking at the
 112          * variable-length part of the beacon.
 113          */
 114         tim_idx = mgmt->u.beacon.variable - beacon;
 115
 116         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 117         while ((tim_idx < (frame_size - 2)) &&
 118                         (beacon[tim_idx] != WLAN_EID_TIM))
 119                 tim_idx += beacon[tim_idx+1] + 2;
 120
 121         /* If TIM field was found, set variables */
 122         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 123                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 124                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 125         } else
 126                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 127 }
 128
 129 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 130 {
 131         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 132         struct iwl_host_cmd cmd = {
 133                 .id = REPLY_TX_BEACON,
 134         };
 135         u32 frame_size;
 136         u32 rate_flags;
 137         u32 rate;
 138
 139         /*
 140          * We have to set up the TX command, the TX Beacon command, and the
 141          * beacon contents.
 142          */
 143
 144         lockdep_assert_held(&priv->mutex);
 145
 146         if (!priv->beacon_ctx) {
 147                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 148                 return 0;
 149         }
 150
 151         if (WARN_ON(!priv->beacon_skb))
 152                 return -EINVAL;
 153
 154         /* Allocate beacon command */
 155         if (!priv->beacon_cmd)
 156                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 157         tx_beacon_cmd = priv->beacon_cmd;
 158         if (!tx_beacon_cmd)
 159                 return -ENOMEM;
 160
 161         frame_size = priv->beacon_skb->len;
 162
 163         /* Set up TX command fields */
 164         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 165         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 166         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 167         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 168                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 169
 170         /* Set up TX beacon command fields */
 171         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 172                            frame_size);
 173
 174         /* Set up packet rate and flags */
 175         rate = iwl_rate_get_lowest_plcp(priv, priv->beacon_ctx);
 176         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 177                                               priv->hw_params.valid_tx_ant);
 178         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 179         if ((rate >= IWL_FIRST_CCK_RATE) && (rate <= IWL_LAST_CCK_RATE))
 180                 rate_flags |= RATE_MCS_CCK_MSK;
 181         tx_beacon_cmd->tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate,
 182                         rate_flags);
 183
 184         /* Submit command */
 185         cmd.len[0] = sizeof(*tx_beacon_cmd);
 186         cmd.data[0] = tx_beacon_cmd;
 187         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 188         cmd.len[1] = frame_size;
 189         cmd.data[1] = priv->beacon_skb->data;
 190         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 191
 192         return iwl_send_cmd_sync(priv, &cmd);
 193 }
 194
 195 static void iwl_bg_beacon_update(struct work_struct *work)
 196 {
 197         struct iwl_priv *priv =
 198                 container_of(work, struct iwl_priv, beacon_update);
 199         struct sk_buff *beacon;
 200
 201         mutex_lock(&priv->mutex);
 202         if (!priv->beacon_ctx) {
 203                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 204                 goto out;
 205         }
 206
 207         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 208                 /*
 209                  * The ucode will send beacon notifications even in
 210                  * IBSS mode, but we don't want to process them. But
 211                  * we need to defer the type check to here due to
 212                  * requiring locking around the beacon_ctx access.
 213                  */
 214                 goto out;
 215         }
 216
 217         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 218         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 219         if (!beacon) {
 220                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 221                 goto out;
 222         }
 223
 224         /* new beacon skb is allocated every time; dispose previous.*/
 225         dev_kfree_skb(priv->beacon_skb);
 226
 227         priv->beacon_skb = beacon;
 228
 229         iwlagn_send_beacon_cmd(priv);
 230  out:
 231         mutex_unlock(&priv->mutex);
 232 }
 233
 234 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 235 {
 236         struct iwl_priv *priv =
 237                 container_of(work, struct iwl_priv, bt_runtime_config);
 238
 239         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 240                 return;
 241
 242         /* dont send host command if rf-kill is on */
 243         if (!iwl_is_ready_rf(priv))
 244                 return;
 245         priv->cfg->ops->hcmd->send_bt_config(priv);
 246 }
 247
 248 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 249 {
 250         struct iwl_priv *priv =
 251                 container_of(work, struct iwl_priv, bt_full_concurrency);
 252         struct iwl_rxon_context *ctx;
 253
 254         mutex_lock(&priv->mutex);
 255
 256         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 257                 goto out;
 258
 259         /* dont send host command if rf-kill is on */
 260         if (!iwl_is_ready_rf(priv))
 261                 goto out;
 262
 263         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 264                        priv->bt_full_concurrent ?
 265                        "full concurrency" : "3-wire");
 266
 267         /*
 268          * LQ & RXON updated cmds must be sent before BT Config cmd
 269          * to avoid 3-wire collisions
 270          */
 271         for_each_context(priv, ctx) {
 272                 if (priv->cfg->ops->hcmd->set_rxon_chain)
 273                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 274                 iwlagn_commit_rxon(priv, ctx);
 275         }
 276
 277         priv->cfg->ops->hcmd->send_bt_config(priv);
 278 out:
 279         mutex_unlock(&priv->mutex);
 280 }
 281
 282 /**
 283  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 284  *
 285  * This callback is provided in order to send a statistics request.
 286  *
 287  * This timer function is continually reset to execute within
 288  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 289  * was received.  We need to ensure we receive the statistics in order
 290  * to update the temperature used for calibrating the TXPOWER.
 291  */
 292 static void iwl_bg_statistics_periodic(unsigned long data)
 293 {
 294         struct iwl_priv *priv = (struct iwl_priv *)data;
 295
 296         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 297                 return;
 298
 299         /* dont send host command if rf-kill is on */
 300         if (!iwl_is_ready_rf(priv))
 301                 return;
 302
 303         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 304 }
 305
 306
 307 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 308                                         u32 start_idx, u32 num_events,
 309                                         u32 mode)
 310 {
 311         u32 i;
 312         u32 ptr;        /* SRAM byte address of log data */
 313         u32 ev, time, data; /* event log data */
 314         unsigned long reg_flags;
 315
 316         if (mode == 0)
 317                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 318         else
 319                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 320
 321         /* Make sure device is powered up for SRAM reads */
 322         spin_lock_irqsave(&priv->reg_lock, reg_flags);
 323         if (iwl_grab_nic_access(priv)) {
 324                 spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 325                 return;
 326         }
 327
 328         /* Set starting address; reads will auto-increment */
 329         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
 330         rmb();
 331
 332         /*
 333          * "time" is actually "data" for mode 0 (no timestamp).
 334          * place event id # at far right for easier visual parsing.
 335          */
 336         for (i = 0; i < num_events; i++) {
 337                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 338                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 339                 if (mode == 0) {
 340                         trace_iwlwifi_dev_ucode_cont_event(priv,
 341                                                         0, time, ev);
 342                 } else {
 343                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
 344                         trace_iwlwifi_dev_ucode_cont_event(priv,
 345                                                 time, data, ev);
 346                 }
 347         }
 348         /* Allow device to power down */
 349         iwl_release_nic_access(priv);
 350         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 351 }
 352
 353 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 354 {
 355         u32 capacity;   /* event log capacity in # entries */
 356         u32 base;       /* SRAM byte address of event log header */
 357         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 358         u32 num_wraps;  /* # times uCode wrapped to top of log */
 359         u32 next_entry; /* index of next entry to be written by uCode */
 360
 361         base = priv->device_pointers.error_event_table;
 362         if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
 363                 capacity = iwl_read_targ_mem(priv, base);
 364                 num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
 365                 mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
 366                 next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
 367         } else
 368                 return;
 369
 370         if (num_wraps == priv->event_log.num_wraps) {
 371                 iwl_print_cont_event_trace(priv,
 372                                        base, priv->event_log.next_entry,
 373                                        next_entry - priv->event_log.next_entry,
 374                                        mode);
 375                 priv->event_log.non_wraps_count++;
 376         } else {
 377                 if ((num_wraps - priv->event_log.num_wraps) > 1)
 378                         priv->event_log.wraps_more_count++;
 379                 else
 380                         priv->event_log.wraps_once_count++;
 381                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 382                                 num_wraps - priv->event_log.num_wraps,
 383                                 next_entry, priv->event_log.next_entry);
 384                 if (next_entry < priv->event_log.next_entry) {
 385                         iwl_print_cont_event_trace(priv, base,
 386                                priv->event_log.next_entry,
 387                                capacity - priv->event_log.next_entry,
 388                                mode);
 389
 390                         iwl_print_cont_event_trace(priv, base, 0,
 391                                 next_entry, mode);
 392                 } else {
 393                         iwl_print_cont_event_trace(priv, base,
 394                                next_entry, capacity - next_entry,
 395                                mode);
 396
 397                         iwl_print_cont_event_trace(priv, base, 0,
 398                                 next_entry, mode);
 399                 }
 400         }
 401         priv->event_log.num_wraps = num_wraps;
 402         priv->event_log.next_entry = next_entry;
 403 }
 404
 405 /**
 406  * iwl_bg_ucode_trace - Timer callback to log ucode event
 407  *
 408  * The timer is continually set to execute every
 409  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 410  * this function is to perform continuous uCode event logging operation
 411  * if enabled
 412  */
 413 static void iwl_bg_ucode_trace(unsigned long data)
 414 {
 415         struct iwl_priv *priv = (struct iwl_priv *)data;
 416
 417         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 418                 return;
 419
 420         if (priv->event_log.ucode_trace) {
 421                 iwl_continuous_event_trace(priv);
 422                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 423                 mod_timer(&priv->ucode_trace,
 424                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 425         }
 426 }
 427
 428 static void iwl_bg_tx_flush(struct work_struct *work)
 429 {
 430         struct iwl_priv *priv =
 431                 container_of(work, struct iwl_priv, tx_flush);
 432
 433         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 434                 return;
 435
 436         /* do nothing if rf-kill is on */
 437         if (!iwl_is_ready_rf(priv))
 438                 return;
 439
 440         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 441         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 442 }
 443
 444 /**
 445  * iwl_rx_handle - Main entry function for receiving responses from uCode
 446  *
 447  * Uses the priv->rx_handlers callback function array to invoke
 448  * the appropriate handlers, including command responses,
 449  * frame-received notifications, and other notifications.
 450  */
 451 static void iwl_rx_handle(struct iwl_priv *priv)
 452 {
 453         struct iwl_rx_mem_buffer *rxb;
 454         struct iwl_rx_packet *pkt;
 455         struct iwl_rx_queue *rxq = &priv->rxq;
 456         u32 r, i;
 457         int reclaim;
 458         unsigned long flags;
 459         u8 fill_rx = 0;
 460         u32 count = 8;
 461         int total_empty;
 462
 463         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 464          * buffer that the driver may process (last buffer filled by ucode). */
 465         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 466         i = rxq->read;
 467
 468         /* Rx interrupt, but nothing sent from uCode */
 469         if (i == r)
 470                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 471
 472         /* calculate total frames need to be restock after handling RX */
 473         total_empty = r - rxq->write_actual;
 474         if (total_empty < 0)
 475                 total_empty += RX_QUEUE_SIZE;
 476
 477         if (total_empty > (RX_QUEUE_SIZE / 2))
 478                 fill_rx = 1;
 479
 480         while (i != r) {
 481                 int len;
 482
 483                 rxb = rxq->queue[i];
 484
 485                 /* If an RXB doesn't have a Rx queue slot associated with it,
 486                  * then a bug has been introduced in the queue refilling
 487                  * routines -- catch it here */
 488                 if (WARN_ON(rxb == NULL)) {
 489                         i = (i + 1) & RX_QUEUE_MASK;
 490                         continue;
 491                 }
 492
 493                 rxq->queue[i] = NULL;
 494
 495                 dma_unmap_page(priv->bus.dev, rxb->page_dma,
 496                                PAGE_SIZE << priv->hw_params.rx_page_order,
 497                                DMA_FROM_DEVICE);
 498                 pkt = rxb_addr(rxb);
 499
 500                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 501                 len += sizeof(u32); /* account for status word */
 502                 trace_iwlwifi_dev_rx(priv, pkt, len);
 503
 504                 /* Reclaim a command buffer only if this packet is a response
 505                  *   to a (driver-originated) command.
 506                  * If the packet (e.g. Rx frame) originated from uCode,
 507                  *   there is no command buffer to reclaim.
 508                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 509                  *   but apparently a few don't get set; catch them here. */
 510                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 511                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 512                         (pkt->hdr.cmd != REPLY_RX) &&
 513                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 514                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 515                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 516                         (pkt->hdr.cmd != REPLY_TX);
 517
 518                 /*
 519                  * Do the notification wait before RX handlers so
 520                  * even if the RX handler consumes the RXB we have
 521                  * access to it in the notification wait entry.
 522                  */
 523                 if (!list_empty(&priv->_agn.notif_waits)) {
 524                         struct iwl_notification_wait *w;
 525
 526                         spin_lock(&priv->_agn.notif_wait_lock);
 527                         list_for_each_entry(w, &priv->_agn.notif_waits, list) {
 528                                 if (w->cmd == pkt->hdr.cmd) {
 529                                         w->triggered = true;
 530                                         if (w->fn)
 531                                                 w->fn(priv, pkt, w->fn_data);
 532                                 }
 533                         }
 534                         spin_unlock(&priv->_agn.notif_wait_lock);
 535
 536                         wake_up_all(&priv->_agn.notif_waitq);
 537                 }
 538                 if (priv->pre_rx_handler)
 539                         priv->pre_rx_handler(priv, rxb);
 540
 541                 /* Based on type of command response or notification,
 542                  *   handle those that need handling via function in
 543                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 544                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 545                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 546                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 547                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 548                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 549                 } else {
 550                         /* No handling needed */
 551                         IWL_DEBUG_RX(priv,
 552                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 553                                 r, i, get_cmd_string(pkt->hdr.cmd),
 554                                 pkt->hdr.cmd);
 555                 }
 556
 557                 /*
 558                  * XXX: After here, we should always check rxb->page
 559                  * against NULL before touching it or its virtual
 560                  * memory (pkt). Because some rx_handler might have
 561                  * already taken or freed the pages.
 562                  */
 563
 564                 if (reclaim) {
 565                         /* Invoke any callbacks, transfer the buffer to caller,
 566                          * and fire off the (possibly) blocking iwl_send_cmd()
 567                          * as we reclaim the driver command queue */
 568                         if (rxb->page)
 569                                 iwl_tx_cmd_complete(priv, rxb);
 570                         else
 571                                 IWL_WARN(priv, "Claim null rxb?\n");
 572                 }
 573
 574                 /* Reuse the page if possible. For notification packets and
 575                  * SKBs that fail to Rx correctly, add them back into the
 576                  * rx_free list for reuse later. */
 577                 spin_lock_irqsave(&rxq->lock, flags);
 578                 if (rxb->page != NULL) {
 579                         rxb->page_dma = dma_map_page(priv->bus.dev, rxb->page,
 580                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
 581                                 DMA_FROM_DEVICE);
 582                         list_add_tail(&rxb->list, &rxq->rx_free);
 583                         rxq->free_count++;
 584                 } else
 585                         list_add_tail(&rxb->list, &rxq->rx_used);
 586
 587                 spin_unlock_irqrestore(&rxq->lock, flags);
 588
 589                 i = (i + 1) & RX_QUEUE_MASK;
 590                 /* If there are a lot of unused frames,
 591                  * restock the Rx queue so ucode wont assert. */
 592                 if (fill_rx) {
 593                         count++;
 594                         if (count >= 8) {
 595                                 rxq->read = i;
 596                                 iwlagn_rx_replenish_now(priv);
 597                                 count = 0;
 598                         }
 599                 }
 600         }
 601
 602         /* Backtrack one entry */
 603         rxq->read = i;
 604         if (fill_rx)
 605                 iwlagn_rx_replenish_now(priv);
 606         else
 607                 iwlagn_rx_queue_restock(priv);
 608 }
 609
 610 /* tasklet for iwlagn interrupt */
 611 static void iwl_irq_tasklet(struct iwl_priv *priv)
 612 {
 613         u32 inta = 0;
 614         u32 handled = 0;
 615         unsigned long flags;
 616         u32 i;
 617 #ifdef CONFIG_IWLWIFI_DEBUG
 618         u32 inta_mask;
 619 #endif
 620
 621         spin_lock_irqsave(&priv->lock, flags);
 622
 623         /* Ack/clear/reset pending uCode interrupts.
 624          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
 625          */
 626         /* There is a hardware bug in the interrupt mask function that some
 627          * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if
 628          * they are disabled in the CSR_INT_MASK register. Furthermore the
 629          * ICT interrupt handling mechanism has another bug that might cause
 630          * these unmasked interrupts fail to be detected. We workaround the
 631          * hardware bugs here by ACKing all the possible interrupts so that
 632          * interrupt coalescing can still be achieved.
 633          */
 634         iwl_write32(priv, CSR_INT, priv->_agn.inta | ~priv->inta_mask);
 635
 636         inta = priv->_agn.inta;
 637
 638 #ifdef CONFIG_IWLWIFI_DEBUG
 639         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
 640                 /* just for debug */
 641                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
 642                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
 643                                 inta, inta_mask);
 644         }
 645 #endif
 646
 647         spin_unlock_irqrestore(&priv->lock, flags);
 648
 649         /* saved interrupt in inta variable now we can reset priv->_agn.inta */
 650         priv->_agn.inta = 0;
 651
 652         /* Now service all interrupt bits discovered above. */
 653         if (inta & CSR_INT_BIT_HW_ERR) {
 654                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
 655
 656                 /* Tell the device to stop sending interrupts */
 657                 iwl_disable_interrupts(priv);
 658
 659                 priv->isr_stats.hw++;
 660                 iwl_irq_handle_error(priv);
 661
 662                 handled |= CSR_INT_BIT_HW_ERR;
 663
 664                 return;
 665         }
 666
 667 #ifdef CONFIG_IWLWIFI_DEBUG
 668         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
 669                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
 670                 if (inta & CSR_INT_BIT_SCD) {
 671                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
 672                                       "the frame/frames.\n");
 673                         priv->isr_stats.sch++;
 674                 }
 675
 676                 /* Alive notification via Rx interrupt will do the real work */
 677                 if (inta & CSR_INT_BIT_ALIVE) {
 678                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
 679                         priv->isr_stats.alive++;
 680                 }
 681         }
 682 #endif
 683         /* Safely ignore these bits for debug checks below */
 684         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
 685
 686         /* HW RF KILL switch toggled */
 687         if (inta & CSR_INT_BIT_RF_KILL) {
 688                 int hw_rf_kill = 0;
 689                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
 690                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
 691                         hw_rf_kill = 1;
 692
 693                 IWL_WARN(priv, "RF_KILL bit toggled to %s.\n",
 694                                 hw_rf_kill ? "disable radio" : "enable radio");
 695
 696                 priv->isr_stats.rfkill++;
 697
 698                 /* driver only loads ucode once setting the interface up.
 699                  * the driver allows loading the ucode even if the radio
 700                  * is killed. Hence update the killswitch state here. The
 701                  * rfkill handler will care about restarting if needed.
 702                  */
 703                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
 704                         if (hw_rf_kill)
 705                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 706                         else
 707                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 708                         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rf_kill);
 709                 }
 710
 711                 handled |= CSR_INT_BIT_RF_KILL;
 712         }
 713
 714         /* Chip got too hot and stopped itself */
 715         if (inta & CSR_INT_BIT_CT_KILL) {
 716                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
 717                 priv->isr_stats.ctkill++;
 718                 handled |= CSR_INT_BIT_CT_KILL;
 719         }
 720
 721         /* Error detected by uCode */
 722         if (inta & CSR_INT_BIT_SW_ERR) {
 723                 IWL_ERR(priv, "Microcode SW error detected. "
 724                         " Restarting 0x%X.\n", inta);
 725                 priv->isr_stats.sw++;
 726                 iwl_irq_handle_error(priv);
 727                 handled |= CSR_INT_BIT_SW_ERR;
 728         }
 729
 730         /* uCode wakes up after power-down sleep */
 731         if (inta & CSR_INT_BIT_WAKEUP) {
 732                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
 733                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
 734                 for (i = 0; i < priv->hw_params.max_txq_num; i++)
 735                         iwl_txq_update_write_ptr(priv, &priv->txq[i]);
 736
 737                 priv->isr_stats.wakeup++;
 738
 739                 handled |= CSR_INT_BIT_WAKEUP;
 740         }
 741
 742         /* All uCode command responses, including Tx command responses,
 743          * Rx "responses" (frame-received notification), and other
 744          * notifications from uCode come through here*/
 745         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX |
 746                         CSR_INT_BIT_RX_PERIODIC)) {
 747                 IWL_DEBUG_ISR(priv, "Rx interrupt\n");
 748                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
 749                         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
 750                         iwl_write32(priv, CSR_FH_INT_STATUS,
 751                                         CSR_FH_INT_RX_MASK);
 752                 }
 753                 if (inta & CSR_INT_BIT_RX_PERIODIC) {
 754                         handled |= CSR_INT_BIT_RX_PERIODIC;
 755                         iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
 756                 }
 757                 /* Sending RX interrupt require many steps to be done in the
 758                  * the device:
 759                  * 1- write interrupt to current index in ICT table.
 760                  * 2- dma RX frame.
 761                  * 3- update RX shared data to indicate last write index.
 762                  * 4- send interrupt.
 763                  * This could lead to RX race, driver could receive RX interrupt
 764                  * but the shared data changes does not reflect this;
 765                  * periodic interrupt will detect any dangling Rx activity.
 766                  */
 767
 768                 /* Disable periodic interrupt; we use it as just a one-shot. */
 769                 iwl_write8(priv, CSR_INT_PERIODIC_REG,
 770                             CSR_INT_PERIODIC_DIS);
 771                 iwl_rx_handle(priv);
 772
 773                 /*
 774                  * Enable periodic interrupt in 8 msec only if we received
 775                  * real RX interrupt (instead of just periodic int), to catch
 776                  * any dangling Rx interrupt.  If it was just the periodic
 777                  * interrupt, there was no dangling Rx activity, and no need
 778                  * to extend the periodic interrupt; one-shot is enough.
 779                  */
 780                 if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
 781                         iwl_write8(priv, CSR_INT_PERIODIC_REG,
 782                                     CSR_INT_PERIODIC_ENA);
 783
 784                 priv->isr_stats.rx++;
 785         }
 786
 787         /* This "Tx" DMA channel is used only for loading uCode */
 788         if (inta & CSR_INT_BIT_FH_TX) {
 789                 iwl_write32(priv, CSR_FH_INT_STATUS, CSR_FH_INT_TX_MASK);
 790                 IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
 791                 priv->isr_stats.tx++;
 792                 handled |= CSR_INT_BIT_FH_TX;
 793                 /* Wake up uCode load routine, now that load is complete */
 794                 priv->ucode_write_complete = 1;
 795                 wake_up_interruptible(&priv->wait_command_queue);
 796         }
 797
 798         if (inta & ~handled) {
 799                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
 800                 priv->isr_stats.unhandled++;
 801         }
 802
 803         if (inta & ~(priv->inta_mask)) {
 804                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
 805                          inta & ~priv->inta_mask);
 806         }
 807
 808         /* Re-enable all interrupts */
 809         /* only Re-enable if disabled by irq */
 810         if (test_bit(STATUS_INT_ENABLED, &priv->status))
 811                 iwl_enable_interrupts(priv);
 812         /* Re-enable RF_KILL if it occurred */
 813         else if (handled & CSR_INT_BIT_RF_KILL)
 814                 iwl_enable_rfkill_int(priv);
 815 }
 816
 817 /*****************************************************************************
 818  *
 819  * sysfs attributes
 820  *
 821  *****************************************************************************/
 822
 823 #ifdef CONFIG_IWLWIFI_DEBUG
 824
 825 /*
 826  * The following adds a new attribute to the sysfs representation
 827  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
 828  * used for controlling the debug level.
 829  *
 830  * See the level definitions in iwl for details.
 831  *
 832  * The debug_level being managed using sysfs below is a per device debug
 833  * level that is used instead of the global debug level if it (the per
 834  * device debug level) is set.
 835  */
 836 static ssize_t show_debug_level(struct device *d,
 837                                 struct device_attribute *attr, char *buf)
 838 {
 839         struct iwl_priv *priv = dev_get_drvdata(d);
 840         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
 841 }
 842 static ssize_t store_debug_level(struct device *d,
 843                                 struct device_attribute *attr,
 844                                  const char *buf, size_t count)
 845 {
 846         struct iwl_priv *priv = dev_get_drvdata(d);
 847         unsigned long val;
 848         int ret;
 849
 850         ret = strict_strtoul(buf, 0, &val);
 851         if (ret)
 852                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
 853         else {
 854                 priv->debug_level = val;
 855                 if (iwl_alloc_traffic_mem(priv))
 856                         IWL_ERR(priv,
 857                                 "Not enough memory to generate traffic log\n");
 858         }
 859         return strnlen(buf, count);
 860 }
 861
 862 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
 863                         show_debug_level, store_debug_level);
 864
 865
 866 #endif /* CONFIG_IWLWIFI_DEBUG */
 867
 868
 869 static ssize_t show_temperature(struct device *d,
 870                                 struct device_attribute *attr, char *buf)
 871 {
 872         struct iwl_priv *priv = dev_get_drvdata(d);
 873
 874         if (!iwl_is_alive(priv))
 875                 return -EAGAIN;
 876
 877         return sprintf(buf, "%d\n", priv->temperature);
 878 }
 879
 880 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
 881
 882 static ssize_t show_tx_power(struct device *d,
 883                              struct device_attribute *attr, char *buf)
 884 {
 885         struct iwl_priv *priv = dev_get_drvdata(d);
 886
 887         if (!iwl_is_ready_rf(priv))
 888                 return sprintf(buf, "off\n");
 889         else
 890                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
 891 }
 892
 893 static ssize_t store_tx_power(struct device *d,
 894                               struct device_attribute *attr,
 895                               const char *buf, size_t count)
 896 {
 897         struct iwl_priv *priv = dev_get_drvdata(d);
 898         unsigned long val;
 899         int ret;
 900
 901         ret = strict_strtoul(buf, 10, &val);
 902         if (ret)
 903                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
 904         else {
 905                 ret = iwl_set_tx_power(priv, val, false);
 906                 if (ret)
 907                         IWL_ERR(priv, "failed setting tx power (0x%d).\n",
 908                                 ret);
 909                 else
 910                         ret = count;
 911         }
 912         return ret;
 913 }
 914
 915 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
 916
 917 static struct attribute *iwl_sysfs_entries[] = {
 918         &dev_attr_temperature.attr,
 919         &dev_attr_tx_power.attr,
 920 #ifdef CONFIG_IWLWIFI_DEBUG
 921         &dev_attr_debug_level.attr,
 922 #endif
 923         NULL
 924 };
 925
 926 static struct attribute_group iwl_attribute_group = {
 927         .name = NULL,           /* put in device directory */
 928         .attrs = iwl_sysfs_entries,
 929 };
 930
 931 /******************************************************************************
 932  *
 933  * uCode download functions
 934  *
 935  ******************************************************************************/
 936
 937 static void iwl_free_fw_desc(struct iwl_priv *priv, struct fw_desc *desc)
 938 {
 939         if (desc->v_addr)
 940                 dma_free_coherent(priv->bus.dev, desc->len,
 941                                   desc->v_addr, desc->p_addr);
 942         desc->v_addr = NULL;
 943         desc->len = 0;
 944 }
 945
 946 static void iwl_free_fw_img(struct iwl_priv *priv, struct fw_img *img)
 947 {
 948         iwl_free_fw_desc(priv, &img->code);
 949         iwl_free_fw_desc(priv, &img->data);
 950 }
 951
 952 static void iwl_dealloc_ucode(struct iwl_priv *priv)
 953 {
 954         iwl_free_fw_img(priv, &priv->ucode_rt);
 955         iwl_free_fw_img(priv, &priv->ucode_init);
 956 }
 957
 958 static int iwl_alloc_fw_desc(struct iwl_priv *priv, struct fw_desc *desc,
 959                              const void *data, size_t len)
 960 {
 961         if (!len) {
 962                 desc->v_addr = NULL;
 963                 return -EINVAL;
 964         }
 965
 966         desc->v_addr = dma_alloc_coherent(priv->bus.dev, len,
 967                                           &desc->p_addr, GFP_KERNEL);
 968         if (!desc->v_addr)
 969                 return -ENOMEM;
 970
 971         desc->len = len;
 972         memcpy(desc->v_addr, data, len);
 973         return 0;
 974 }
 975
 976 struct iwlagn_ucode_capabilities {
 977         u32 max_probe_length;
 978         u32 standard_phy_calibration_size;
 979         u32 flags;
 980 };
 981
 982 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
 983 static int iwl_mac_setup_register(struct iwl_priv *priv,
 984                                   struct iwlagn_ucode_capabilities *capa);
 985
 986 #define UCODE_EXPERIMENTAL_INDEX        100
 987 #define UCODE_EXPERIMENTAL_TAG          "exp"
 988
 989 static int __must_check iwl_request_firmware(struct iwl_priv *priv, bool first)
 990 {
 991         const char *name_pre = priv->cfg->fw_name_pre;
 992         char tag[8];
 993
 994         if (first) {
 995 #ifdef CONFIG_IWLWIFI_DEBUG_EXPERIMENTAL_UCODE
 996                 priv->fw_index = UCODE_EXPERIMENTAL_INDEX;
 997                 strcpy(tag, UCODE_EXPERIMENTAL_TAG);
 998         } else if (priv->fw_index == UCODE_EXPERIMENTAL_INDEX) {
 999 #endif
1000                 priv->fw_index = priv->cfg->ucode_api_max;
1001                 sprintf(tag, "%d", priv->fw_index);
1002         } else {
1003                 priv->fw_index--;
1004                 sprintf(tag, "%d", priv->fw_index);
1005         }
1006
1007         if (priv->fw_index < priv->cfg->ucode_api_min) {
1008                 IWL_ERR(priv, "no suitable firmware found!\n");
1009                 return -ENOENT;
1010         }
1011
1012         sprintf(priv->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
1013
1014         IWL_DEBUG_INFO(priv, "attempting to load firmware %s'%s'\n",
1015                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1016                                 ? "EXPERIMENTAL " : "",
1017                        priv->firmware_name);
1018
1019         return request_firmware_nowait(THIS_MODULE, 1, priv->firmware_name,
1020                                        priv->bus.dev,
1021                                        GFP_KERNEL, priv, iwl_ucode_callback);
1022 }
1023
1024 struct iwlagn_firmware_pieces {
1025         const void *inst, *data, *init, *init_data;
1026         size_t inst_size, data_size, init_size, init_data_size;
1027
1028         u32 build;
1029
1030         u32 init_evtlog_ptr, init_evtlog_size, init_errlog_ptr;
1031         u32 inst_evtlog_ptr, inst_evtlog_size, inst_errlog_ptr;
1032 };
1033
1034 static int iwlagn_load_legacy_firmware(struct iwl_priv *priv,
1035                                        const struct firmware *ucode_raw,
1036                                        struct iwlagn_firmware_pieces *pieces)
1037 {
1038         struct iwl_ucode_header *ucode = (void *)ucode_raw->data;
1039         u32 api_ver, hdr_size;
1040         const u8 *src;
1041
1042         priv->ucode_ver = le32_to_cpu(ucode->ver);
1043         api_ver = IWL_UCODE_API(priv->ucode_ver);
1044
1045         switch (api_ver) {
1046         default:
1047                 hdr_size = 28;
1048                 if (ucode_raw->size < hdr_size) {
1049                         IWL_ERR(priv, "File size too small!\n");
1050                         return -EINVAL;
1051                 }
1052                 pieces->build = le32_to_cpu(ucode->u.v2.build);
1053                 pieces->inst_size = le32_to_cpu(ucode->u.v2.inst_size);
1054                 pieces->data_size = le32_to_cpu(ucode->u.v2.data_size);
1055                 pieces->init_size = le32_to_cpu(ucode->u.v2.init_size);
1056                 pieces->init_data_size = le32_to_cpu(ucode->u.v2.init_data_size);
1057                 src = ucode->u.v2.data;
1058                 break;
1059         case 0:
1060         case 1:
1061         case 2:
1062                 hdr_size = 24;
1063                 if (ucode_raw->size < hdr_size) {
1064                         IWL_ERR(priv, "File size too small!\n");
1065                         return -EINVAL;
1066                 }
1067                 pieces->build = 0;
1068                 pieces->inst_size = le32_to_cpu(ucode->u.v1.inst_size);
1069                 pieces->data_size = le32_to_cpu(ucode->u.v1.data_size);
1070                 pieces->init_size = le32_to_cpu(ucode->u.v1.init_size);
1071                 pieces->init_data_size = le32_to_cpu(ucode->u.v1.init_data_size);
1072                 src = ucode->u.v1.data;
1073                 break;
1074         }
1075
1076         /* Verify size of file vs. image size info in file's header */
1077         if (ucode_raw->size != hdr_size + pieces->inst_size +
1078                                 pieces->data_size + pieces->init_size +
1079                                 pieces->init_data_size) {
1080
1081                 IWL_ERR(priv,
1082                         "uCode file size %d does not match expected size\n",
1083                         (int)ucode_raw->size);
1084                 return -EINVAL;
1085         }
1086
1087         pieces->inst = src;
1088         src += pieces->inst_size;
1089         pieces->data = src;
1090         src += pieces->data_size;
1091         pieces->init = src;
1092         src += pieces->init_size;
1093         pieces->init_data = src;
1094         src += pieces->init_data_size;
1095
1096         return 0;
1097 }
1098
1099 static int iwlagn_wanted_ucode_alternative = 1;
1100
1101 static int iwlagn_load_firmware(struct iwl_priv *priv,
1102                                 const struct firmware *ucode_raw,
1103                                 struct iwlagn_firmware_pieces *pieces,
1104                                 struct iwlagn_ucode_capabilities *capa)
1105 {
1106         struct iwl_tlv_ucode_header *ucode = (void *)ucode_raw->data;
1107         struct iwl_ucode_tlv *tlv;
1108         size_t len = ucode_raw->size;
1109         const u8 *data;
1110         int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
1111         u64 alternatives;
1112         u32 tlv_len;
1113         enum iwl_ucode_tlv_type tlv_type;
1114         const u8 *tlv_data;
1115
1116         if (len < sizeof(*ucode)) {
1117                 IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
1118                 return -EINVAL;
1119         }
1120
1121         if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
1122                 IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
1123                         le32_to_cpu(ucode->magic));
1124                 return -EINVAL;
1125         }
1126
1127         /*
1128          * Check which alternatives are present, and "downgrade"
1129          * when the chosen alternative is not present, warning
1130          * the user when that happens. Some files may not have
1131          * any alternatives, so don't warn in that case.
1132          */
1133         alternatives = le64_to_cpu(ucode->alternatives);
1134         tmp = wanted_alternative;
1135         if (wanted_alternative > 63)
1136                 wanted_alternative = 63;
1137         while (wanted_alternative && !(alternatives & BIT(wanted_alternative)))
1138                 wanted_alternative--;
1139         if (wanted_alternative && wanted_alternative != tmp)
1140                 IWL_WARN(priv,
1141                          "uCode alternative %d not available, choosing %d\n",
1142                          tmp, wanted_alternative);
1143
1144         priv->ucode_ver = le32_to_cpu(ucode->ver);
1145         pieces->build = le32_to_cpu(ucode->build);
1146         data = ucode->data;
1147
1148         len -= sizeof(*ucode);
1149
1150         while (len >= sizeof(*tlv)) {
1151                 u16 tlv_alt;
1152
1153                 len -= sizeof(*tlv);
1154                 tlv = (void *)data;
1155
1156                 tlv_len = le32_to_cpu(tlv->length);
1157                 tlv_type = le16_to_cpu(tlv->type);
1158                 tlv_alt = le16_to_cpu(tlv->alternative);
1159                 tlv_data = tlv->data;
1160
1161                 if (len < tlv_len) {
1162                         IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
1163                                 len, tlv_len);
1164                         return -EINVAL;
1165                 }
1166                 len -= ALIGN(tlv_len, 4);
1167                 data += sizeof(*tlv) + ALIGN(tlv_len, 4);
1168
1169                 /*
1170                  * Alternative 0 is always valid.
1171                  *
1172                  * Skip alternative TLVs that are not selected.
1173                  */
1174                 if (tlv_alt != 0 && tlv_alt != wanted_alternative)
1175                         continue;
1176
1177                 switch (tlv_type) {
1178                 case IWL_UCODE_TLV_INST:
1179                         pieces->inst = tlv_data;
1180                         pieces->inst_size = tlv_len;
1181                         break;
1182                 case IWL_UCODE_TLV_DATA:
1183                         pieces->data = tlv_data;
1184                         pieces->data_size = tlv_len;
1185                         break;
1186                 case IWL_UCODE_TLV_INIT:
1187                         pieces->init = tlv_data;
1188                         pieces->init_size = tlv_len;
1189                         break;
1190                 case IWL_UCODE_TLV_INIT_DATA:
1191                         pieces->init_data = tlv_data;
1192                         pieces->init_data_size = tlv_len;
1193                         break;
1194                 case IWL_UCODE_TLV_BOOT:
1195                         IWL_ERR(priv, "Found unexpected BOOT ucode\n");
1196                         break;
1197                 case IWL_UCODE_TLV_PROBE_MAX_LEN:
1198                         if (tlv_len != sizeof(u32))
1199                                 goto invalid_tlv_len;
1200                         capa->max_probe_length =
1201                                         le32_to_cpup((__le32 *)tlv_data);
1202                         break;
1203                 case IWL_UCODE_TLV_PAN:
1204                         if (tlv_len)
1205                                 goto invalid_tlv_len;
1206                         capa->flags |= IWL_UCODE_TLV_FLAGS_PAN;
1207                         break;
1208                 case IWL_UCODE_TLV_FLAGS:
1209                         /* must be at least one u32 */
1210                         if (tlv_len < sizeof(u32))
1211                                 goto invalid_tlv_len;
1212                         /* and a proper number of u32s */
1213                         if (tlv_len % sizeof(u32))
1214                                 goto invalid_tlv_len;
1215                         /*
1216                          * This driver only reads the first u32 as
1217                          * right now no more features are defined,
1218                          * if that changes then either the driver
1219                          * will not work with the new firmware, or
1220                          * it'll not take advantage of new features.
1221                          */
1222                         capa->flags = le32_to_cpup((__le32 *)tlv_data);
1223                         break;
1224                 case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
1225                         if (tlv_len != sizeof(u32))
1226                                 goto invalid_tlv_len;
1227                         pieces->init_evtlog_ptr =
1228                                         le32_to_cpup((__le32 *)tlv_data);
1229                         break;
1230                 case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
1231                         if (tlv_len != sizeof(u32))
1232                                 goto invalid_tlv_len;
1233                         pieces->init_evtlog_size =
1234                                         le32_to_cpup((__le32 *)tlv_data);
1235                         break;
1236                 case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
1237                         if (tlv_len != sizeof(u32))
1238                                 goto invalid_tlv_len;
1239                         pieces->init_errlog_ptr =
1240                                         le32_to_cpup((__le32 *)tlv_data);
1241                         break;
1242                 case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
1243                         if (tlv_len != sizeof(u32))
1244                                 goto invalid_tlv_len;
1245                         pieces->inst_evtlog_ptr =
1246                                         le32_to_cpup((__le32 *)tlv_data);
1247                         break;
1248                 case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
1249                         if (tlv_len != sizeof(u32))
1250                                 goto invalid_tlv_len;
1251                         pieces->inst_evtlog_size =
1252                                         le32_to_cpup((__le32 *)tlv_data);
1253                         break;
1254                 case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
1255                         if (tlv_len != sizeof(u32))
1256                                 goto invalid_tlv_len;
1257                         pieces->inst_errlog_ptr =
1258                                         le32_to_cpup((__le32 *)tlv_data);
1259                         break;
1260                 case IWL_UCODE_TLV_ENHANCE_SENS_TBL:
1261                         if (tlv_len)
1262                                 goto invalid_tlv_len;
1263                         priv->enhance_sensitivity_table = true;
1264                         break;
1265                 case IWL_UCODE_TLV_PHY_CALIBRATION_SIZE:
1266                         if (tlv_len != sizeof(u32))
1267                                 goto invalid_tlv_len;
1268                         capa->standard_phy_calibration_size =
1269                                         le32_to_cpup((__le32 *)tlv_data);
1270                         break;
1271                 default:
1272                         IWL_DEBUG_INFO(priv, "unknown TLV: %d\n", tlv_type);
1273                         break;
1274                 }
1275         }
1276
1277         if (len) {
1278                 IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
1279                 iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
1280                 return -EINVAL;
1281         }
1282
1283         return 0;
1284
1285  invalid_tlv_len:
1286         IWL_ERR(priv, "TLV %d has invalid size: %u\n", tlv_type, tlv_len);
1287         iwl_print_hex_dump(priv, IWL_DL_FW, tlv_data, tlv_len);
1288
1289         return -EINVAL;
1290 }
1291
1292 /**
1293  * iwl_ucode_callback - callback when firmware was loaded
1294  *
1295  * If loaded successfully, copies the firmware into buffers
1296  * for the card to fetch (via DMA).
1297  */
1298 static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
1299 {
1300         struct iwl_priv *priv = context;
1301         struct iwl_ucode_header *ucode;
1302         int err;
1303         struct iwlagn_firmware_pieces pieces;
1304         const unsigned int api_max = priv->cfg->ucode_api_max;
1305         const unsigned int api_min = priv->cfg->ucode_api_min;
1306         u32 api_ver;
1307         char buildstr[25];
1308         u32 build;
1309         struct iwlagn_ucode_capabilities ucode_capa = {
1310                 .max_probe_length = 200,
1311                 .standard_phy_calibration_size =
1312                         IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE,
1313         };
1314
1315         memset(&pieces, 0, sizeof(pieces));
1316
1317         if (!ucode_raw) {
1318                 if (priv->fw_index <= priv->cfg->ucode_api_max)
1319                         IWL_ERR(priv,
1320                                 "request for firmware file '%s' failed.\n",
1321                                 priv->firmware_name);
1322                 goto try_again;
1323         }
1324
1325         IWL_DEBUG_INFO(priv, "Loaded firmware file '%s' (%zd bytes).\n",
1326                        priv->firmware_name, ucode_raw->size);
1327
1328         /* Make sure that we got at least the API version number */
1329         if (ucode_raw->size < 4) {
1330                 IWL_ERR(priv, "File size way too small!\n");
1331                 goto try_again;
1332         }
1333
1334         /* Data from ucode file:  header followed by uCode images */
1335         ucode = (struct iwl_ucode_header *)ucode_raw->data;
1336
1337         if (ucode->ver)
1338                 err = iwlagn_load_legacy_firmware(priv, ucode_raw, &pieces);
1339         else
1340                 err = iwlagn_load_firmware(priv, ucode_raw, &pieces,
1341                                            &ucode_capa);
1342
1343         if (err)
1344                 goto try_again;
1345
1346         api_ver = IWL_UCODE_API(priv->ucode_ver);
1347         build = pieces.build;
1348
1349         /*
1350          * api_ver should match the api version forming part of the
1351          * firmware filename ... but we don't check for that and only rely
1352          * on the API version read from firmware header from here on forward
1353          */
1354         /* no api version check required for experimental uCode */
1355         if (priv->fw_index != UCODE_EXPERIMENTAL_INDEX) {
1356                 if (api_ver < api_min || api_ver > api_max) {
1357                         IWL_ERR(priv,
1358                                 "Driver unable to support your firmware API. "
1359                                 "Driver supports v%u, firmware is v%u.\n",
1360                                 api_max, api_ver);
1361                         goto try_again;
1362                 }
1363
1364                 if (api_ver != api_max)
1365                         IWL_ERR(priv,
1366                                 "Firmware has old API version. Expected v%u, "
1367                                 "got v%u. New firmware can be obtained "
1368                                 "from http://www.intellinuxwireless.org.\n",
1369                                 api_max, api_ver);
1370         }
1371
1372         if (build)
1373                 sprintf(buildstr, " build %u%s", build,
1374                        (priv->fw_index == UCODE_EXPERIMENTAL_INDEX)
1375                                 ? " (EXP)" : "");
1376         else
1377                 buildstr[0] = '\0';
1378
1379         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u%s\n",
1380                  IWL_UCODE_MAJOR(priv->ucode_ver),
1381                  IWL_UCODE_MINOR(priv->ucode_ver),
1382                  IWL_UCODE_API(priv->ucode_ver),
1383                  IWL_UCODE_SERIAL(priv->ucode_ver),
1384                  buildstr);
1385
1386         snprintf(priv->hw->wiphy->fw_version,
1387                  sizeof(priv->hw->wiphy->fw_version),
1388                  "%u.%u.%u.%u%s",
1389                  IWL_UCODE_MAJOR(priv->ucode_ver),
1390                  IWL_UCODE_MINOR(priv->ucode_ver),
1391                  IWL_UCODE_API(priv->ucode_ver),
1392                  IWL_UCODE_SERIAL(priv->ucode_ver),
1393                  buildstr);
1394
1395         /*
1396          * For any of the failures below (before allocating pci memory)
1397          * we will try to load a version with a smaller API -- maybe the
1398          * user just got a corrupted version of the latest API.
1399          */
1400
1401         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1402                        priv->ucode_ver);
1403         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %Zd\n",
1404                        pieces.inst_size);
1405         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %Zd\n",
1406                        pieces.data_size);
1407         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %Zd\n",
1408                        pieces.init_size);
1409         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %Zd\n",
1410                        pieces.init_data_size);
1411
1412         /* Verify that uCode images will fit in card's SRAM */
1413         if (pieces.inst_size > priv->hw_params.max_inst_size) {
1414                 IWL_ERR(priv, "uCode instr len %Zd too large to fit in\n",
1415                         pieces.inst_size);
1416                 goto try_again;
1417         }
1418
1419         if (pieces.data_size > priv->hw_params.max_data_size) {
1420                 IWL_ERR(priv, "uCode data len %Zd too large to fit in\n",
1421                         pieces.data_size);
1422                 goto try_again;
1423         }
1424
1425         if (pieces.init_size > priv->hw_params.max_inst_size) {
1426                 IWL_ERR(priv, "uCode init instr len %Zd too large to fit in\n",
1427                         pieces.init_size);
1428                 goto try_again;
1429         }
1430
1431         if (pieces.init_data_size > priv->hw_params.max_data_size) {
1432                 IWL_ERR(priv, "uCode init data len %Zd too large to fit in\n",
1433                         pieces.init_data_size);
1434                 goto try_again;
1435         }
1436
1437         /* Allocate ucode buffers for card's bus-master loading ... */
1438
1439         /* Runtime instructions and 2 copies of data:
1440          * 1) unmodified from disk
1441          * 2) backup cache for save/restore during power-downs */
1442         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.code,
1443                               pieces.inst, pieces.inst_size))
1444                 goto err_pci_alloc;
1445         if (iwl_alloc_fw_desc(priv, &priv->ucode_rt.data,
1446                               pieces.data, pieces.data_size))
1447                 goto err_pci_alloc;
1448
1449         /* Initialization instructions and data */
1450         if (pieces.init_size && pieces.init_data_size) {
1451                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.code,
1452                                       pieces.init, pieces.init_size))
1453                         goto err_pci_alloc;
1454                 if (iwl_alloc_fw_desc(priv, &priv->ucode_init.data,
1455                                       pieces.init_data, pieces.init_data_size))
1456                         goto err_pci_alloc;
1457         }
1458
1459         /* Now that we can no longer fail, copy information */
1460
1461         /*
1462          * The (size - 16) / 12 formula is based on the information recorded
1463          * for each event, which is of mode 1 (including timestamp) for all
1464          * new microcodes that include this information.
1465          */
1466         priv->_agn.init_evtlog_ptr = pieces.init_evtlog_ptr;
1467         if (pieces.init_evtlog_size)
1468                 priv->_agn.init_evtlog_size = (pieces.init_evtlog_size - 16)/12;
1469         else
1470                 priv->_agn.init_evtlog_size =
1471                         priv->cfg->base_params->max_event_log_size;
1472         priv->_agn.init_errlog_ptr = pieces.init_errlog_ptr;
1473         priv->_agn.inst_evtlog_ptr = pieces.inst_evtlog_ptr;
1474         if (pieces.inst_evtlog_size)
1475                 priv->_agn.inst_evtlog_size = (pieces.inst_evtlog_size - 16)/12;
1476         else
1477                 priv->_agn.inst_evtlog_size =
1478                         priv->cfg->base_params->max_event_log_size;
1479         priv->_agn.inst_errlog_ptr = pieces.inst_errlog_ptr;
1480
1481         priv->new_scan_threshold_behaviour =
1482                 !!(ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1483
1484         if ((priv->cfg->sku & EEPROM_SKU_CAP_IPAN_ENABLE) &&
1485             (ucode_capa.flags & IWL_UCODE_TLV_FLAGS_PAN)) {
1486                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
1487                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1488         } else
1489                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1490
1491         if (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1492                 priv->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1493         else
1494                 priv->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1495
1496         /*
1497          * figure out the offset of chain noise reset and gain commands
1498          * base on the size of standard phy calibration commands table size
1499          */
1500         if (ucode_capa.standard_phy_calibration_size >
1501             IWL_MAX_PHY_CALIBRATE_TBL_SIZE)
1502                 ucode_capa.standard_phy_calibration_size =
1503                         IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE;
1504
1505         priv->_agn.phy_calib_chain_noise_reset_cmd =
1506                 ucode_capa.standard_phy_calibration_size;
1507         priv->_agn.phy_calib_chain_noise_gain_cmd =
1508                 ucode_capa.standard_phy_calibration_size + 1;
1509
1510         /**************************************************
1511          * This is still part of probe() in a sense...
1512          *
1513          * 9. Setup and register with mac80211 and debugfs
1514          **************************************************/
1515         err = iwl_mac_setup_register(priv, &ucode_capa);
1516         if (err)
1517                 goto out_unbind;
1518
1519         err = iwl_dbgfs_register(priv, DRV_NAME);
1520         if (err)
1521                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
1522
1523         err = sysfs_create_group(&(priv->bus.dev->kobj),
1524                                         &iwl_attribute_group);
1525         if (err) {
1526                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
1527                 goto out_unbind;
1528         }
1529
1530         /* We have our copies now, allow OS release its copies */
1531         release_firmware(ucode_raw);
1532         complete(&priv->_agn.firmware_loading_complete);
1533         return;
1534
1535  try_again:
1536         /* try next, if any */
1537         if (iwl_request_firmware(priv, false))
1538                 goto out_unbind;
1539         release_firmware(ucode_raw);
1540         return;
1541
1542  err_pci_alloc:
1543         IWL_ERR(priv, "failed to allocate pci memory\n");
1544         iwl_dealloc_ucode(priv);
1545  out_unbind:
1546         complete(&priv->_agn.firmware_loading_complete);
1547         device_release_driver(priv->bus.dev);
1548         release_firmware(ucode_raw);
1549 }
1550
1551 static const char *desc_lookup_text[] = {
1552         "OK",
1553         "FAIL",
1554         "BAD_PARAM",
1555         "BAD_CHECKSUM",
1556         "NMI_INTERRUPT_WDG",
1557         "SYSASSERT",
1558         "FATAL_ERROR",
1559         "BAD_COMMAND",
1560         "HW_ERROR_TUNE_LOCK",
1561         "HW_ERROR_TEMPERATURE",
1562         "ILLEGAL_CHAN_FREQ",
1563         "VCC_NOT_STABLE",
1564         "FH_ERROR",
1565         "NMI_INTERRUPT_HOST",
1566         "NMI_INTERRUPT_ACTION_PT",
1567         "NMI_INTERRUPT_UNKNOWN",
1568         "UCODE_VERSION_MISMATCH",
1569         "HW_ERROR_ABS_LOCK",
1570         "HW_ERROR_CAL_LOCK_FAIL",
1571         "NMI_INTERRUPT_INST_ACTION_PT",
1572         "NMI_INTERRUPT_DATA_ACTION_PT",
1573         "NMI_TRM_HW_ER",
1574         "NMI_INTERRUPT_TRM",
1575         "NMI_INTERRUPT_BREAK_POINT"
1576         "DEBUG_0",
1577         "DEBUG_1",
1578         "DEBUG_2",
1579         "DEBUG_3",
1580 };
1581
1582 static struct { char *name; u8 num; } advanced_lookup[] = {
1583         { "NMI_INTERRUPT_WDG", 0x34 },
1584         { "SYSASSERT", 0x35 },
1585         { "UCODE_VERSION_MISMATCH", 0x37 },
1586         { "BAD_COMMAND", 0x38 },
1587         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1588         { "FATAL_ERROR", 0x3D },
1589         { "NMI_TRM_HW_ERR", 0x46 },
1590         { "NMI_INTERRUPT_TRM", 0x4C },
1591         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1592         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1593         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1594         { "NMI_INTERRUPT_HOST", 0x66 },
1595         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1596         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1597         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1598         { "ADVANCED_SYSASSERT", 0 },
1599 };
1600
1601 static const char *desc_lookup(u32 num)
1602 {
1603         int i;
1604         int max = ARRAY_SIZE(desc_lookup_text);
1605
1606         if (num < max)
1607                 return desc_lookup_text[num];
1608
1609         max = ARRAY_SIZE(advanced_lookup) - 1;
1610         for (i = 0; i < max; i++) {
1611                 if (advanced_lookup[i].num == num)
1612                         break;
1613         }
1614         return advanced_lookup[i].name;
1615 }
1616
1617 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1618 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1619
1620 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1621 {
1622         u32 base;
1623         struct iwl_error_event_table table;
1624
1625         base = priv->device_pointers.error_event_table;
1626         if (priv->ucode_type == IWL_UCODE_INIT) {
1627                 if (!base)
1628                         base = priv->_agn.init_errlog_ptr;
1629         } else {
1630                 if (!base)
1631                         base = priv->_agn.inst_errlog_ptr;
1632         }
1633
1634         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1635                 IWL_ERR(priv,
1636                         "Not valid error log pointer 0x%08X for %s uCode\n",
1637                         base,
1638                         (priv->ucode_type == IWL_UCODE_INIT)
1639                                         ? "Init" : "RT");
1640                 return;
1641         }
1642
1643         iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
1644
1645         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1646                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1647                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1648                         priv->status, table.valid);
1649         }
1650
1651         priv->isr_stats.err_code = table.error_id;
1652
1653         trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
1654                                       table.data1, table.data2, table.line,
1655                                       table.blink1, table.blink2, table.ilink1,
1656                                       table.ilink2, table.bcon_time, table.gp1,
1657                                       table.gp2, table.gp3, table.ucode_ver,
1658                                       table.hw_ver, table.brd_ver);
1659         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1660                 desc_lookup(table.error_id));
1661         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1662         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1663         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1664         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1665         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1666         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1667         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1668         IWL_ERR(priv, "0x%08X | line\n", table.line);
1669         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1670         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1671         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1672         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1673         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1674         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1675         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1676         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1677         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1678         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1679 }
1680
1681 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1682
1683 /**
1684  * iwl_print_event_log - Dump error event log to syslog
1685  *
1686  */
1687 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1688                                u32 num_events, u32 mode,
1689                                int pos, char **buf, size_t bufsz)
1690 {
1691         u32 i;
1692         u32 base;       /* SRAM byte address of event log header */
1693         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1694         u32 ptr;        /* SRAM byte address of log data */
1695         u32 ev, time, data; /* event log data */
1696         unsigned long reg_flags;
1697
1698         if (num_events == 0)
1699                 return pos;
1700
1701         base = priv->device_pointers.log_event_table;
1702         if (priv->ucode_type == IWL_UCODE_INIT) {
1703                 if (!base)
1704                         base = priv->_agn.init_evtlog_ptr;
1705         } else {
1706                 if (!base)
1707                         base = priv->_agn.inst_evtlog_ptr;
1708         }
1709
1710         if (mode == 0)
1711                 event_size = 2 * sizeof(u32);
1712         else
1713                 event_size = 3 * sizeof(u32);
1714
1715         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1716
1717         /* Make sure device is powered up for SRAM reads */
1718         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1719         iwl_grab_nic_access(priv);
1720
1721         /* Set starting address; reads will auto-increment */
1722         iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
1723         rmb();
1724
1725         /* "time" is actually "data" for mode 0 (no timestamp).
1726         * place event id # at far right for easier visual parsing. */
1727         for (i = 0; i < num_events; i++) {
1728                 ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1729                 time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1730                 if (mode == 0) {
1731                         /* data, ev */
1732                         if (bufsz) {
1733                                 pos += scnprintf(*buf + pos, bufsz - pos,
1734                                                 "EVT_LOG:0x%08x:%04u\n",
1735                                                 time, ev);
1736                         } else {
1737                                 trace_iwlwifi_dev_ucode_event(priv, 0,
1738                                         time, ev);
1739                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1740                                         time, ev);
1741                         }
1742                 } else {
1743                         data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
1744                         if (bufsz) {
1745                                 pos += scnprintf(*buf + pos, bufsz - pos,
1746                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1747                                                  time, data, ev);
1748                         } else {
1749                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1750                                         time, data, ev);
1751                                 trace_iwlwifi_dev_ucode_event(priv, time,
1752                                         data, ev);
1753                         }
1754                 }
1755         }
1756
1757         /* Allow device to power down */
1758         iwl_release_nic_access(priv);
1759         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1760         return pos;
1761 }
1762
1763 /**
1764  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1765  */
1766 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1767                                     u32 num_wraps, u32 next_entry,
1768                                     u32 size, u32 mode,
1769                                     int pos, char **buf, size_t bufsz)
1770 {
1771         /*
1772          * display the newest DEFAULT_LOG_ENTRIES entries
1773          * i.e the entries just before the next ont that uCode would fill.
1774          */
1775         if (num_wraps) {
1776                 if (next_entry < size) {
1777                         pos = iwl_print_event_log(priv,
1778                                                 capacity - (size - next_entry),
1779                                                 size - next_entry, mode,
1780                                                 pos, buf, bufsz);
1781                         pos = iwl_print_event_log(priv, 0,
1782                                                   next_entry, mode,
1783                                                   pos, buf, bufsz);
1784                 } else
1785                         pos = iwl_print_event_log(priv, next_entry - size,
1786                                                   size, mode, pos, buf, bufsz);
1787         } else {
1788                 if (next_entry < size) {
1789                         pos = iwl_print_event_log(priv, 0, next_entry,
1790                                                   mode, pos, buf, bufsz);
1791                 } else {
1792                         pos = iwl_print_event_log(priv, next_entry - size,
1793                                                   size, mode, pos, buf, bufsz);
1794                 }
1795         }
1796         return pos;
1797 }
1798
1799 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1800
1801 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1802                             char **buf, bool display)
1803 {
1804         u32 base;       /* SRAM byte address of event log header */
1805         u32 capacity;   /* event log capacity in # entries */
1806         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1807         u32 num_wraps;  /* # times uCode wrapped to top of log */
1808         u32 next_entry; /* index of next entry to be written by uCode */
1809         u32 size;       /* # entries that we'll print */
1810         u32 logsize;
1811         int pos = 0;
1812         size_t bufsz = 0;
1813
1814         base = priv->device_pointers.log_event_table;
1815         if (priv->ucode_type == IWL_UCODE_INIT) {
1816                 logsize = priv->_agn.init_evtlog_size;
1817                 if (!base)
1818                         base = priv->_agn.init_evtlog_ptr;
1819         } else {
1820                 logsize = priv->_agn.inst_evtlog_size;
1821                 if (!base)
1822                         base = priv->_agn.inst_evtlog_ptr;
1823         }
1824
1825         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1826                 IWL_ERR(priv,
1827                         "Invalid event log pointer 0x%08X for %s uCode\n",
1828                         base,
1829                         (priv->ucode_type == IWL_UCODE_INIT)
1830                                         ? "Init" : "RT");
1831                 return -EINVAL;
1832         }
1833
1834         /* event log header */
1835         capacity = iwl_read_targ_mem(priv, base);
1836         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1837         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1838         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1839
1840         if (capacity > logsize) {
1841                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1842                         capacity, logsize);
1843                 capacity = logsize;
1844         }
1845
1846         if (next_entry > logsize) {
1847                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1848                         next_entry, logsize);
1849                 next_entry = logsize;
1850         }
1851
1852         size = num_wraps ? capacity : next_entry;
1853
1854         /* bail out if nothing in log */
1855         if (size == 0) {
1856                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1857                 return pos;
1858         }
1859
1860         /* enable/disable bt channel inhibition */
1861         priv->bt_ch_announce = iwlagn_bt_ch_announce;
1862
1863 #ifdef CONFIG_IWLWIFI_DEBUG
1864         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1865                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1866                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1867 #else
1868         size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1869                 ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1870 #endif
1871         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1872                 size);
1873
1874 #ifdef CONFIG_IWLWIFI_DEBUG
1875         if (display) {
1876                 if (full_log)
1877                         bufsz = capacity * 48;
1878                 else
1879                         bufsz = size * 48;
1880                 *buf = kmalloc(bufsz, GFP_KERNEL);
1881                 if (!*buf)
1882                         return -ENOMEM;
1883         }
1884         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1885                 /*
1886                  * if uCode has wrapped back to top of log,
1887                  * start at the oldest entry,
1888                  * i.e the next one that uCode would fill.
1889                  */
1890                 if (num_wraps)
1891                         pos = iwl_print_event_log(priv, next_entry,
1892                                                 capacity - next_entry, mode,
1893                                                 pos, buf, bufsz);
1894                 /* (then/else) start at top of log */
1895                 pos = iwl_print_event_log(priv, 0,
1896                                           next_entry, mode, pos, buf, bufsz);
1897         } else
1898                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1899                                                 next_entry, size, mode,
1900                                                 pos, buf, bufsz);
1901 #else
1902         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1903                                         next_entry, size, mode,
1904                                         pos, buf, bufsz);
1905 #endif
1906         return pos;
1907 }
1908
1909 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1910 {
1911         struct iwl_ct_kill_config cmd;
1912         struct iwl_ct_kill_throttling_config adv_cmd;
1913         unsigned long flags;
1914         int ret = 0;
1915
1916         spin_lock_irqsave(&priv->lock, flags);
1917         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1918                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1919         spin_unlock_irqrestore(&priv->lock, flags);
1920         priv->thermal_throttle.ct_kill_toggle = false;
1921
1922         if (priv->cfg->base_params->support_ct_kill_exit) {
1923                 adv_cmd.critical_temperature_enter =
1924                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1925                 adv_cmd.critical_temperature_exit =
1926                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1927
1928                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1929                                        sizeof(adv_cmd), &adv_cmd);
1930                 if (ret)
1931                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1932                 else
1933                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1934                                         "succeeded, "
1935                                         "critical temperature enter is %d,"
1936                                         "exit is %d\n",
1937                                        priv->hw_params.ct_kill_threshold,
1938                                        priv->hw_params.ct_kill_exit_threshold);
1939         } else {
1940                 cmd.critical_temperature_R =
1941                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1942
1943                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1944                                        sizeof(cmd), &cmd);
1945                 if (ret)
1946                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1947                 else
1948                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1949                                         "succeeded, "
1950                                         "critical temperature is %d\n",
1951                                         priv->hw_params.ct_kill_threshold);
1952         }
1953 }
1954
1955 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
1956 {
1957         struct iwl_calib_cfg_cmd calib_cfg_cmd;
1958         struct iwl_host_cmd cmd = {
1959                 .id = CALIBRATION_CFG_CMD,
1960                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
1961                 .data = { &calib_cfg_cmd, },
1962         };
1963
1964         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
1965         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_INIT_CFG_ALL;
1966         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
1967
1968         return iwl_send_cmd(priv, &cmd);
1969 }
1970
1971
1972 /**
1973  * iwl_alive_start - called after REPLY_ALIVE notification received
1974  *                   from protocol/runtime uCode (initialization uCode's
1975  *                   Alive gets handled by iwl_init_alive_start()).
1976  */
1977 int iwl_alive_start(struct iwl_priv *priv)
1978 {
1979         int ret = 0;
1980         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1981
1982         iwl_reset_ict(priv);
1983
1984         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1985
1986         /* After the ALIVE response, we can send host commands to the uCode */
1987         set_bit(STATUS_ALIVE, &priv->status);
1988
1989         /* Enable watchdog to monitor the driver tx queues */
1990         iwl_setup_watchdog(priv);
1991
1992         if (iwl_is_rfkill(priv))
1993                 return -ERFKILL;
1994
1995         /* download priority table before any calibration request */
1996         if (priv->cfg->bt_params &&
1997             priv->cfg->bt_params->advanced_bt_coexist) {
1998                 /* Configure Bluetooth device coexistence support */
1999                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
2000                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
2001                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
2002                 priv->cfg->ops->hcmd->send_bt_config(priv);
2003                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
2004                 iwlagn_send_prio_tbl(priv);
2005
2006                 /* FIXME: w/a to force change uCode BT state machine */
2007                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
2008                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2009                 if (ret)
2010                         return ret;
2011                 ret = iwlagn_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
2012                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
2013                 if (ret)
2014                         return ret;
2015         }
2016         if (priv->hw_params.calib_rt_cfg)
2017                 iwlagn_send_calib_cfg_rt(priv, priv->hw_params.calib_rt_cfg);
2018
2019         ieee80211_wake_queues(priv->hw);
2020
2021         priv->active_rate = IWL_RATES_MASK;
2022
2023         /* Configure Tx antenna selection based on H/W config */
2024         if (priv->cfg->ops->hcmd->set_tx_ant)
2025                 priv->cfg->ops->hcmd->set_tx_ant(priv, priv->cfg->valid_tx_ant);
2026
2027         if (iwl_is_associated_ctx(ctx)) {
2028                 struct iwl_rxon_cmd *active_rxon =
2029                                 (struct iwl_rxon_cmd *)&ctx->active;
2030                 /* apply any changes in staging */
2031                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2032                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2033         } else {
2034                 struct iwl_rxon_context *tmp;
2035                 /* Initialize our rx_config data */
2036                 for_each_context(priv, tmp)
2037                         iwl_connection_init_rx_config(priv, tmp);
2038
2039                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2040                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2041         }
2042
2043         if (!priv->cfg->bt_params || (priv->cfg->bt_params &&
2044             !priv->cfg->bt_params->advanced_bt_coexist)) {
2045                 /*
2046                  * default is 2-wire BT coexexistence support
2047                  */
2048                 priv->cfg->ops->hcmd->send_bt_config(priv);
2049         }
2050
2051         iwl_reset_run_time_calib(priv);
2052
2053         set_bit(STATUS_READY, &priv->status);
2054
2055         /* Configure the adapter for unassociated operation */
2056         ret = iwlagn_commit_rxon(priv, ctx);
2057         if (ret)
2058                 return ret;
2059
2060         /* At this point, the NIC is initialized and operational */
2061         iwl_rf_kill_ct_config(priv);
2062
2063         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2064
2065         return iwl_power_update_mode(priv, true);
2066 }
2067
2068 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2069
2070 static void __iwl_down(struct iwl_priv *priv)
2071 {
2072         int exit_pending;
2073
2074         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2075
2076         iwl_scan_cancel_timeout(priv, 200);
2077
2078         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2079
2080         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2081          * to prevent rearm timer */
2082         del_timer_sync(&priv->watchdog);
2083
2084         iwl_clear_ucode_stations(priv, NULL);
2085         iwl_dealloc_bcast_stations(priv);
2086         iwl_clear_driver_stations(priv);
2087
2088         /* reset BT coex data */
2089         priv->bt_status = 0;
2090         if (priv->cfg->bt_params)
2091                 priv->bt_traffic_load =
2092                          priv->cfg->bt_params->bt_init_traffic_load;
2093         else
2094                 priv->bt_traffic_load = 0;
2095         priv->bt_full_concurrent = false;
2096         priv->bt_ci_compliance = 0;
2097
2098         /* Wipe out the EXIT_PENDING status bit if we are not actually
2099          * exiting the module */
2100         if (!exit_pending)
2101                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2102
2103         if (priv->mac80211_registered)
2104                 ieee80211_stop_queues(priv->hw);
2105
2106         /* Clear out all status bits but a few that are stable across reset */
2107         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2108                                 STATUS_RF_KILL_HW |
2109                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2110                                 STATUS_GEO_CONFIGURED |
2111                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2112                                 STATUS_FW_ERROR |
2113                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2114                                 STATUS_EXIT_PENDING;
2115
2116         iwlagn_stop_device(priv);
2117
2118         dev_kfree_skb(priv->beacon_skb);
2119         priv->beacon_skb = NULL;
2120 }
2121
2122 static void iwl_down(struct iwl_priv *priv)
2123 {
2124         mutex_lock(&priv->mutex);
2125         __iwl_down(priv);
2126         mutex_unlock(&priv->mutex);
2127
2128         iwl_cancel_deferred_work(priv);
2129 }
2130
2131 #define HW_READY_TIMEOUT (50)
2132
2133 /* Note: returns poll_bit return value, which is >= 0 if success */
2134 static int iwl_set_hw_ready(struct iwl_priv *priv)
2135 {
2136         int ret;
2137
2138         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2139                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
2140
2141         /* See if we got it */
2142         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2143                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2144                                 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
2145                                 HW_READY_TIMEOUT);
2146
2147         IWL_DEBUG_INFO(priv, "hardware%s ready\n", ret < 0 ? " not" : "");
2148         return ret;
2149 }
2150
2151 /* Note: returns standard 0/-ERROR code */
2152 int iwl_prepare_card_hw(struct iwl_priv *priv)
2153 {
2154         int ret;
2155
2156         IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter\n");
2157
2158         ret = iwl_set_hw_ready(priv);
2159         if (ret >= 0)
2160                 return 0;
2161
2162         /* If HW is not ready, prepare the conditions to check again */
2163         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
2164                         CSR_HW_IF_CONFIG_REG_PREPARE);
2165
2166         ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
2167                         ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
2168                         CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
2169
2170         if (ret < 0)
2171                 return ret;
2172
2173         /* HW should be ready by now, check again. */
2174         ret = iwl_set_hw_ready(priv);
2175         if (ret >= 0)
2176                 return 0;
2177         return ret;
2178 }
2179
2180 #define MAX_HW_RESTARTS 5
2181
2182 static int __iwl_up(struct iwl_priv *priv)
2183 {
2184         struct iwl_rxon_context *ctx;
2185         int ret;
2186
2187         lockdep_assert_held(&priv->mutex);
2188
2189         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2190                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2191                 return -EIO;
2192         }
2193
2194         for_each_context(priv, ctx) {
2195                 ret = iwlagn_alloc_bcast_station(priv, ctx);
2196                 if (ret) {
2197                         iwl_dealloc_bcast_stations(priv);
2198                         return ret;
2199                 }
2200         }
2201
2202         ret = iwlagn_run_init_ucode(priv);
2203         if (ret) {
2204                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
2205                 goto error;
2206         }
2207
2208         ret = iwlagn_load_ucode_wait_alive(priv,
2209                                            &priv->ucode_rt,
2210                                            IWL_UCODE_REGULAR);
2211         if (ret) {
2212                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
2213                 goto error;
2214         }
2215
2216         ret = iwl_alive_start(priv);
2217         if (ret)
2218                 goto error;
2219         return 0;
2220
2221  error:
2222         set_bit(STATUS_EXIT_PENDING, &priv->status);
2223         __iwl_down(priv);
2224         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2225
2226         IWL_ERR(priv, "Unable to initialize device.\n");
2227         return ret;
2228 }
2229
2230
2231 /*****************************************************************************
2232  *
2233  * Workqueue callbacks
2234  *
2235  *****************************************************************************/
2236
2237 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2238 {
2239         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2240                         run_time_calib_work);
2241
2242         mutex_lock(&priv->mutex);
2243
2244         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2245             test_bit(STATUS_SCANNING, &priv->status)) {
2246                 mutex_unlock(&priv->mutex);
2247                 return;
2248         }
2249
2250         if (priv->start_calib) {
2251                 iwl_chain_noise_calibration(priv);
2252                 iwl_sensitivity_calibration(priv);
2253         }
2254
2255         mutex_unlock(&priv->mutex);
2256 }
2257
2258 static void iwlagn_prepare_restart(struct iwl_priv *priv)
2259 {
2260         struct iwl_rxon_context *ctx;
2261         bool bt_full_concurrent;
2262         u8 bt_ci_compliance;
2263         u8 bt_load;
2264         u8 bt_status;
2265
2266         lockdep_assert_held(&priv->mutex);
2267
2268         for_each_context(priv, ctx)
2269                 ctx->vif = NULL;
2270         priv->is_open = 0;
2271
2272         /*
2273          * __iwl_down() will clear the BT status variables,
2274          * which is correct, but when we restart we really
2275          * want to keep them so restore them afterwards.
2276          *
2277          * The restart process will later pick them up and
2278          * re-configure the hw when we reconfigure the BT
2279          * command.
2280          */
2281         bt_full_concurrent = priv->bt_full_concurrent;
2282         bt_ci_compliance = priv->bt_ci_compliance;
2283         bt_load = priv->bt_traffic_load;
2284         bt_status = priv->bt_status;
2285
2286         __iwl_down(priv);
2287
2288         priv->bt_full_concurrent = bt_full_concurrent;
2289         priv->bt_ci_compliance = bt_ci_compliance;
2290         priv->bt_traffic_load = bt_load;
2291         priv->bt_status = bt_status;
2292 }
2293
2294 static void iwl_bg_restart(struct work_struct *data)
2295 {
2296         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2297
2298         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2299                 return;
2300
2301         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2302                 mutex_lock(&priv->mutex);
2303                 iwlagn_prepare_restart(priv);
2304                 mutex_unlock(&priv->mutex);
2305                 iwl_cancel_deferred_work(priv);
2306                 ieee80211_restart_hw(priv->hw);
2307         } else {
2308                 WARN_ON(1);
2309         }
2310 }
2311
2312 static void iwl_bg_rx_replenish(struct work_struct *data)
2313 {
2314         struct iwl_priv *priv =
2315             container_of(data, struct iwl_priv, rx_replenish);
2316
2317         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2318                 return;
2319
2320         mutex_lock(&priv->mutex);
2321         iwlagn_rx_replenish(priv);
2322         mutex_unlock(&priv->mutex);
2323 }
2324
2325 static int iwl_mac_offchannel_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
2326                                  struct ieee80211_channel *chan,
2327                                  enum nl80211_channel_type channel_type,
2328                                  unsigned int wait)
2329 {
2330         struct iwl_priv *priv = hw->priv;
2331         int ret;
2332
2333         /* Not supported if we don't have PAN */
2334         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) {
2335                 ret = -EOPNOTSUPP;
2336                 goto free;
2337         }
2338
2339         /* Not supported on pre-P2P firmware */
2340         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
2341                                         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
2342                 ret = -EOPNOTSUPP;
2343                 goto free;
2344         }
2345
2346         mutex_lock(&priv->mutex);
2347
2348         if (!priv->contexts[IWL_RXON_CTX_PAN].is_active) {
2349                 /*
2350                  * If the PAN context is free, use the normal
2351                  * way of doing remain-on-channel offload + TX.
2352                  */
2353                 ret = 1;
2354                 goto out;
2355         }
2356
2357         /* TODO: queue up if scanning? */
2358         if (test_bit(STATUS_SCANNING, &priv->status) ||
2359             priv->_agn.offchan_tx_skb) {
2360                 ret = -EBUSY;
2361                 goto out;
2362         }
2363
2364         /*
2365          * max_scan_ie_len doesn't include the blank SSID or the header,
2366          * so need to add that again here.
2367          */
2368         if (skb->len > hw->wiphy->max_scan_ie_len + 24 + 2) {
2369                 ret = -ENOBUFS;
2370                 goto out;
2371         }
2372
2373         priv->_agn.offchan_tx_skb = skb;
2374         priv->_agn.offchan_tx_timeout = wait;
2375         priv->_agn.offchan_tx_chan = chan;
2376
2377         ret = iwl_scan_initiate(priv, priv->contexts[IWL_RXON_CTX_PAN].vif,
2378                                 IWL_SCAN_OFFCH_TX, chan->band);
2379         if (ret)
2380                 priv->_agn.offchan_tx_skb = NULL;
2381  out:
2382         mutex_unlock(&priv->mutex);
2383  free:
2384         if (ret < 0)
2385                 kfree_skb(skb);
2386
2387         return ret;
2388 }
2389
2390 static int iwl_mac_offchannel_tx_cancel_wait(struct ieee80211_hw *hw)
2391 {
2392         struct iwl_priv *priv = hw->priv;
2393         int ret;
2394
2395         mutex_lock(&priv->mutex);
2396
2397         if (!priv->_agn.offchan_tx_skb) {
2398                 ret = -EINVAL;
2399                 goto unlock;
2400         }
2401
2402         priv->_agn.offchan_tx_skb = NULL;
2403
2404         ret = iwl_scan_cancel_timeout(priv, 200);
2405         if (ret)
2406                 ret = -EIO;
2407 unlock:
2408         mutex_unlock(&priv->mutex);
2409
2410         return ret;
2411 }
2412
2413 /*****************************************************************************
2414  *
2415  * mac80211 entry point functions
2416  *
2417  *****************************************************************************/
2418
2419 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
2420         {
2421                 .max = 1,
2422                 .types = BIT(NL80211_IFTYPE_STATION),
2423         },
2424         {
2425                 .max = 1,
2426                 .types = BIT(NL80211_IFTYPE_AP),
2427         },
2428 };
2429
2430 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
2431         {
2432                 .max = 2,
2433                 .types = BIT(NL80211_IFTYPE_STATION),
2434         },
2435 };
2436
2437 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
2438         {
2439                 .max = 1,
2440                 .types = BIT(NL80211_IFTYPE_STATION),
2441         },
2442         {
2443                 .max = 1,
2444                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
2445                          BIT(NL80211_IFTYPE_AP),
2446         },
2447 };
2448
2449 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
2450         {
2451                 .max = 2,
2452                 .types = BIT(NL80211_IFTYPE_STATION),
2453         },
2454         {
2455                 .max = 1,
2456                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
2457         },
2458 };
2459
2460 static const struct ieee80211_iface_combination
2461 iwlagn_iface_combinations_dualmode[] = {
2462         { .num_different_channels = 1,
2463           .max_interfaces = 2,
2464           .beacon_int_infra_match = true,
2465           .limits = iwlagn_sta_ap_limits,
2466           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
2467         },
2468         { .num_different_channels = 1,
2469           .max_interfaces = 2,
2470           .limits = iwlagn_2sta_limits,
2471           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
2472         },
2473 };
2474
2475 static const struct ieee80211_iface_combination
2476 iwlagn_iface_combinations_p2p[] = {
2477         { .num_different_channels = 1,
2478           .max_interfaces = 2,
2479           .beacon_int_infra_match = true,
2480           .limits = iwlagn_p2p_sta_go_limits,
2481           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
2482         },
2483         { .num_different_channels = 1,
2484           .max_interfaces = 2,
2485           .limits = iwlagn_p2p_2sta_limits,
2486           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
2487         },
2488 };
2489
2490 /*
2491  * Not a mac80211 entry point function, but it fits in with all the
2492  * other mac80211 functions grouped here.
2493  */
2494 static int iwl_mac_setup_register(struct iwl_priv *priv,
2495                                   struct iwlagn_ucode_capabilities *capa)
2496 {
2497         int ret;
2498         struct ieee80211_hw *hw = priv->hw;
2499         struct iwl_rxon_context *ctx;
2500
2501         hw->rate_control_algorithm = "iwl-agn-rs";
2502
2503         /* Tell mac80211 our characteristics */
2504         hw->flags = IEEE80211_HW_SIGNAL_DBM |
2505                     IEEE80211_HW_AMPDU_AGGREGATION |
2506                     IEEE80211_HW_NEED_DTIM_PERIOD |
2507                     IEEE80211_HW_SPECTRUM_MGMT |
2508                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2509
2510         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2511
2512         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
2513                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
2514
2515         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
2516                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2517                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
2518
2519         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
2520                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
2521
2522         hw->sta_data_size = sizeof(struct iwl_station_priv);
2523         hw->vif_data_size = sizeof(struct iwl_vif_priv);
2524
2525         for_each_context(priv, ctx) {
2526                 hw->wiphy->interface_modes |= ctx->interface_modes;
2527                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
2528         }
2529
2530         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
2531
2532         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
2533                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
2534                 hw->wiphy->n_iface_combinations =
2535                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
2536         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
2537                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_dualmode;
2538                 hw->wiphy->n_iface_combinations =
2539                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
2540         }
2541
2542         hw->wiphy->max_remain_on_channel_duration = 1000;
2543
2544         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
2545                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
2546                             WIPHY_FLAG_IBSS_RSN;
2547
2548         /*
2549          * For now, disable PS by default because it affects
2550          * RX performance significantly.
2551          */
2552         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
2553
2554         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
2555         /* we create the 802.11 header and a zero-length SSID element */
2556         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
2557
2558         /* Default value; 4 EDCA QOS priorities */
2559         hw->queues = 4;
2560
2561         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
2562
2563         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
2564                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
2565                         &priv->bands[IEEE80211_BAND_2GHZ];
2566         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
2567                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
2568                         &priv->bands[IEEE80211_BAND_5GHZ];
2569
2570         iwl_leds_init(priv);
2571
2572         ret = ieee80211_register_hw(priv->hw);
2573         if (ret) {
2574                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
2575                 return ret;
2576         }
2577         priv->mac80211_registered = 1;
2578
2579         return 0;
2580 }
2581
2582
2583 static int iwlagn_mac_start(struct ieee80211_hw *hw)
2584 {
2585         struct iwl_priv *priv = hw->priv;
2586         int ret;
2587
2588         IWL_DEBUG_MAC80211(priv, "enter\n");
2589
2590         /* we should be verifying the device is ready to be opened */
2591         mutex_lock(&priv->mutex);
2592         ret = __iwl_up(priv);
2593         mutex_unlock(&priv->mutex);
2594         if (ret)
2595                 return ret;
2596
2597         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2598
2599         /* Now we should be done, and the READY bit should be set. */
2600         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
2601                 ret = -EIO;
2602
2603         iwlagn_led_enable(priv);
2604
2605         priv->is_open = 1;
2606         IWL_DEBUG_MAC80211(priv, "leave\n");
2607         return 0;
2608 }
2609
2610 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
2611 {
2612         struct iwl_priv *priv = hw->priv;
2613
2614         IWL_DEBUG_MAC80211(priv, "enter\n");
2615
2616         if (!priv->is_open)
2617                 return;
2618
2619         priv->is_open = 0;
2620
2621         iwl_down(priv);
2622
2623         flush_workqueue(priv->workqueue);
2624
2625         /* User space software may expect getting rfkill changes
2626          * even if interface is down */
2627         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2628         iwl_enable_rfkill_int(priv);
2629
2630         IWL_DEBUG_MAC80211(priv, "leave\n");
2631 }
2632
2633 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2634 {
2635         struct iwl_priv *priv = hw->priv;
2636
2637         IWL_DEBUG_MACDUMP(priv, "enter\n");
2638
2639         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2640                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2641
2642         if (iwlagn_tx_skb(priv, skb))
2643                 dev_kfree_skb_any(skb);
2644
2645         IWL_DEBUG_MACDUMP(priv, "leave\n");
2646 }
2647
2648 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
2649                                        struct ieee80211_vif *vif,
2650                                        struct ieee80211_key_conf *keyconf,
2651                                        struct ieee80211_sta *sta,
2652                                        u32 iv32, u16 *phase1key)
2653 {
2654         struct iwl_priv *priv = hw->priv;
2655         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2656
2657         IWL_DEBUG_MAC80211(priv, "enter\n");
2658
2659         iwl_update_tkip_key(priv, vif_priv->ctx, keyconf, sta,
2660                             iv32, phase1key);
2661
2662         IWL_DEBUG_MAC80211(priv, "leave\n");
2663 }
2664
2665 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2666                               struct ieee80211_vif *vif,
2667                               struct ieee80211_sta *sta,
2668                               struct ieee80211_key_conf *key)
2669 {
2670         struct iwl_priv *priv = hw->priv;
2671         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2672         struct iwl_rxon_context *ctx = vif_priv->ctx;
2673         int ret;
2674         u8 sta_id;
2675         bool is_default_wep_key = false;
2676
2677         IWL_DEBUG_MAC80211(priv, "enter\n");
2678
2679         if (iwlagn_mod_params.sw_crypto) {
2680                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2681                 return -EOPNOTSUPP;
2682         }
2683
2684         /*
2685          * To support IBSS RSN, don't program group keys in IBSS, the
2686          * hardware will then not attempt to decrypt the frames.
2687          */
2688         if (vif->type == NL80211_IFTYPE_ADHOC &&
2689             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2690                 return -EOPNOTSUPP;
2691
2692         sta_id = iwl_sta_id_or_broadcast(priv, vif_priv->ctx, sta);
2693         if (sta_id == IWL_INVALID_STATION)
2694                 return -EINVAL;
2695
2696         mutex_lock(&priv->mutex);
2697         iwl_scan_cancel_timeout(priv, 100);
2698
2699         /*
2700          * If we are getting WEP group key and we didn't receive any key mapping
2701          * so far, we are in legacy wep mode (group key only), otherwise we are
2702          * in 1X mode.
2703          * In legacy wep mode, we use another host command to the uCode.
2704          */
2705         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2706              key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
2707             !sta) {
2708                 if (cmd == SET_KEY)
2709                         is_default_wep_key = !ctx->key_mapping_keys;
2710                 else
2711                         is_default_wep_key =
2712                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2713         }
2714
2715         switch (cmd) {
2716         case SET_KEY:
2717                 if (is_default_wep_key)
2718                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
2719                 else
2720                         ret = iwl_set_dynamic_key(priv, vif_priv->ctx,
2721                                                   key, sta_id);
2722
2723                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2724                 break;
2725         case DISABLE_KEY:
2726                 if (is_default_wep_key)
2727                         ret = iwl_remove_default_wep_key(priv, ctx, key);
2728                 else
2729                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta_id);
2730
2731                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2732                 break;
2733         default:
2734                 ret = -EINVAL;
2735         }
2736
2737         mutex_unlock(&priv->mutex);
2738         IWL_DEBUG_MAC80211(priv, "leave\n");
2739
2740         return ret;
2741 }
2742
2743 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
2744                                    struct ieee80211_vif *vif,
2745                                    enum ieee80211_ampdu_mlme_action action,
2746                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2747                                    u8 buf_size)
2748 {
2749         struct iwl_priv *priv = hw->priv;
2750         int ret = -EINVAL;
2751         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
2752
2753         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2754                      sta->addr, tid);
2755
2756         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
2757                 return -EACCES;
2758
2759         mutex_lock(&priv->mutex);
2760
2761         switch (action) {
2762         case IEEE80211_AMPDU_RX_START:
2763                 IWL_DEBUG_HT(priv, "start Rx\n");
2764                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
2765                 break;
2766         case IEEE80211_AMPDU_RX_STOP:
2767                 IWL_DEBUG_HT(priv, "stop Rx\n");
2768                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
2769                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2770                         ret = 0;
2771                 break;
2772         case IEEE80211_AMPDU_TX_START:
2773                 IWL_DEBUG_HT(priv, "start Tx\n");
2774                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
2775                 if (ret == 0) {
2776                         priv->_agn.agg_tids_count++;
2777                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2778                                      priv->_agn.agg_tids_count);
2779                 }
2780                 break;
2781         case IEEE80211_AMPDU_TX_STOP:
2782                 IWL_DEBUG_HT(priv, "stop Tx\n");
2783                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
2784                 if ((ret == 0) && (priv->_agn.agg_tids_count > 0)) {
2785                         priv->_agn.agg_tids_count--;
2786                         IWL_DEBUG_HT(priv, "priv->_agn.agg_tids_count = %u\n",
2787                                      priv->_agn.agg_tids_count);
2788                 }
2789                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2790                         ret = 0;
2791                 if (priv->cfg->ht_params &&
2792                     priv->cfg->ht_params->use_rts_for_aggregation) {
2793                         /*
2794                          * switch off RTS/CTS if it was previously enabled
2795                          */
2796                         sta_priv->lq_sta.lq.general_params.flags &=
2797                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2798                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2799                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2800                 }
2801                 break;
2802         case IEEE80211_AMPDU_TX_OPERATIONAL:
2803                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2804
2805                 iwlagn_txq_agg_queue_setup(priv, sta, tid, buf_size);
2806
2807                 /*
2808                  * If the limit is 0, then it wasn't initialised yet,
2809                  * use the default. We can do that since we take the
2810                  * minimum below, and we don't want to go above our
2811                  * default due to hardware restrictions.
2812                  */
2813                 if (sta_priv->max_agg_bufsize == 0)
2814                         sta_priv->max_agg_bufsize =
2815                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
2816
2817                 /*
2818                  * Even though in theory the peer could have different
2819                  * aggregation reorder buffer sizes for different sessions,
2820                  * our ucode doesn't allow for that and has a global limit
2821                  * for each station. Therefore, use the minimum of all the
2822                  * aggregation sessions and our default value.
2823                  */
2824                 sta_priv->max_agg_bufsize =
2825                         min(sta_priv->max_agg_bufsize, buf_size);
2826
2827                 if (priv->cfg->ht_params &&
2828                     priv->cfg->ht_params->use_rts_for_aggregation) {
2829                         /*
2830                          * switch to RTS/CTS if it is the prefer protection
2831                          * method for HT traffic
2832                          */
2833
2834                         sta_priv->lq_sta.lq.general_params.flags |=
2835                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
2836                 }
2837
2838                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
2839                         sta_priv->max_agg_bufsize;
2840
2841                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
2842                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
2843
2844                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
2845                          sta->addr, tid);
2846                 ret = 0;
2847                 break;
2848         }
2849         mutex_unlock(&priv->mutex);
2850
2851         return ret;
2852 }
2853
2854 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
2855                               struct ieee80211_vif *vif,
2856                               struct ieee80211_sta *sta)
2857 {
2858         struct iwl_priv *priv = hw->priv;
2859         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
2860         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
2861         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
2862         int ret;
2863         u8 sta_id;
2864
2865         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
2866                         sta->addr);
2867         mutex_lock(&priv->mutex);
2868         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
2869                         sta->addr);
2870         sta_priv->common.sta_id = IWL_INVALID_STATION;
2871
2872         atomic_set(&sta_priv->pending_frames, 0);
2873         if (vif->type == NL80211_IFTYPE_AP)
2874                 sta_priv->client = true;
2875
2876         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
2877                                      is_ap, sta, &sta_id);
2878         if (ret) {
2879                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
2880                         sta->addr, ret);
2881                 /* Should we return success if return code is EEXIST ? */
2882                 mutex_unlock(&priv->mutex);
2883                 return ret;
2884         }
2885
2886         sta_priv->common.sta_id = sta_id;
2887
2888         /* Initialize rate scaling */
2889         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
2890                        sta->addr);
2891         iwl_rs_rate_init(priv, sta, sta_id);
2892         mutex_unlock(&priv->mutex);
2893
2894         return 0;
2895 }
2896
2897 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
2898                                 struct ieee80211_channel_switch *ch_switch)
2899 {
2900         struct iwl_priv *priv = hw->priv;
2901         const struct iwl_channel_info *ch_info;
2902         struct ieee80211_conf *conf = &hw->conf;
2903         struct ieee80211_channel *channel = ch_switch->channel;
2904         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2905         /*
2906          * MULTI-FIXME
2907          * When we add support for multiple interfaces, we need to
2908          * revisit this. The channel switch command in the device
2909          * only affects the BSS context, but what does that really
2910          * mean? And what if we get a CSA on the second interface?
2911          * This needs a lot of work.
2912          */
2913         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2914         u16 ch;
2915
2916         IWL_DEBUG_MAC80211(priv, "enter\n");
2917
2918         mutex_lock(&priv->mutex);
2919
2920         if (iwl_is_rfkill(priv))
2921                 goto out;
2922
2923         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2924             test_bit(STATUS_SCANNING, &priv->status) ||
2925             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
2926                 goto out;
2927
2928         if (!iwl_is_associated_ctx(ctx))
2929                 goto out;
2930
2931         if (!priv->cfg->ops->lib->set_channel_switch)
2932                 goto out;
2933
2934         ch = channel->hw_value;
2935         if (le16_to_cpu(ctx->active.channel) == ch)
2936                 goto out;
2937
2938         ch_info = iwl_get_channel_info(priv, channel->band, ch);
2939         if (!is_channel_valid(ch_info)) {
2940                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
2941                 goto out;
2942         }
2943
2944         spin_lock_irq(&priv->lock);
2945
2946         priv->current_ht_config.smps = conf->smps_mode;
2947
2948         /* Configure HT40 channels */
2949         ctx->ht.enabled = conf_is_ht(conf);
2950         if (ctx->ht.enabled) {
2951                 if (conf_is_ht40_minus(conf)) {
2952                         ctx->ht.extension_chan_offset =
2953                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2954                         ctx->ht.is_40mhz = true;
2955                 } else if (conf_is_ht40_plus(conf)) {
2956                         ctx->ht.extension_chan_offset =
2957                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2958                         ctx->ht.is_40mhz = true;
2959                 } else {
2960                         ctx->ht.extension_chan_offset =
2961                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
2962                         ctx->ht.is_40mhz = false;
2963                 }
2964         } else
2965                 ctx->ht.is_40mhz = false;
2966
2967         if ((le16_to_cpu(ctx->staging.channel) != ch))
2968                 ctx->staging.flags = 0;
2969
2970         iwl_set_rxon_channel(priv, channel, ctx);
2971         iwl_set_rxon_ht(priv, ht_conf);
2972         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
2973
2974         spin_unlock_irq(&priv->lock);
2975
2976         iwl_set_rate(priv);
2977         /*
2978          * at this point, staging_rxon has the
2979          * configuration for channel switch
2980          */
2981         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2982         priv->switch_channel = cpu_to_le16(ch);
2983         if (priv->cfg->ops->lib->set_channel_switch(priv, ch_switch)) {
2984                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
2985                 priv->switch_channel = 0;
2986                 ieee80211_chswitch_done(ctx->vif, false);
2987         }
2988
2989 out:
2990         mutex_unlock(&priv->mutex);
2991         IWL_DEBUG_MAC80211(priv, "leave\n");
2992 }
2993
2994 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
2995                                     unsigned int changed_flags,
2996                                     unsigned int *total_flags,
2997                                     u64 multicast)
2998 {
2999         struct iwl_priv *priv = hw->priv;
3000         __le32 filter_or = 0, filter_nand = 0;
3001         struct iwl_rxon_context *ctx;
3002
3003 #define CHK(test, flag) do { \
3004         if (*total_flags & (test))              \
3005                 filter_or |= (flag);            \
3006         else                                    \
3007                 filter_nand |= (flag);          \
3008         } while (0)
3009
3010         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3011                         changed_flags, *total_flags);
3012
3013         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3014         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
3015         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
3016         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3017
3018 #undef CHK
3019
3020         mutex_lock(&priv->mutex);
3021
3022         for_each_context(priv, ctx) {
3023                 ctx->staging.filter_flags &= ~filter_nand;
3024                 ctx->staging.filter_flags |= filter_or;
3025
3026                 /*
3027                  * Not committing directly because hardware can perform a scan,
3028                  * but we'll eventually commit the filter flags change anyway.
3029                  */
3030         }
3031
3032         mutex_unlock(&priv->mutex);
3033
3034         /*
3035          * Receiving all multicast frames is always enabled by the
3036          * default flags setup in iwl_connection_init_rx_config()
3037          * since we currently do not support programming multicast
3038          * filters into the device.
3039          */
3040         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3041                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3042 }
3043
3044 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
3045 {
3046         struct iwl_priv *priv = hw->priv;
3047
3048         mutex_lock(&priv->mutex);
3049         IWL_DEBUG_MAC80211(priv, "enter\n");
3050
3051         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3052                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
3053                 goto done;
3054         }
3055         if (iwl_is_rfkill(priv)) {
3056                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
3057                 goto done;
3058         }
3059
3060         /*
3061          * mac80211 will not push any more frames for transmit
3062          * until the flush is completed
3063          */
3064         if (drop) {
3065                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
3066                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
3067                         IWL_ERR(priv, "flush request fail\n");
3068                         goto done;
3069                 }
3070         }
3071         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
3072         iwlagn_wait_tx_queue_empty(priv);
3073 done:
3074         mutex_unlock(&priv->mutex);
3075         IWL_DEBUG_MAC80211(priv, "leave\n");
3076 }
3077
3078 static void iwlagn_disable_roc(struct iwl_priv *priv)
3079 {
3080         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
3081         struct ieee80211_channel *chan = ACCESS_ONCE(priv->hw->conf.channel);
3082
3083         lockdep_assert_held(&priv->mutex);
3084
3085         if (!ctx->is_active)
3086                 return;
3087
3088         ctx->staging.dev_type = RXON_DEV_TYPE_2STA;
3089         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3090         iwl_set_rxon_channel(priv, chan, ctx);
3091         iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
3092
3093         priv->_agn.hw_roc_channel = NULL;
3094
3095         iwlagn_commit_rxon(priv, ctx);
3096
3097         ctx->is_active = false;
3098 }
3099
3100 static void iwlagn_bg_roc_done(struct work_struct *work)
3101 {
3102         struct iwl_priv *priv = container_of(work, struct iwl_priv,
3103                                              _agn.hw_roc_work.work);
3104
3105         mutex_lock(&priv->mutex);
3106         ieee80211_remain_on_channel_expired(priv->hw);
3107         iwlagn_disable_roc(priv);
3108         mutex_unlock(&priv->mutex);
3109 }
3110
3111 static int iwl_mac_remain_on_channel(struct ieee80211_hw *hw,
3112                                      struct ieee80211_channel *channel,
3113                                      enum nl80211_channel_type channel_type,
3114                                      int duration)
3115 {
3116         struct iwl_priv *priv = hw->priv;
3117         int err = 0;
3118
3119         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3120                 return -EOPNOTSUPP;
3121
3122         if (!(priv->contexts[IWL_RXON_CTX_PAN].interface_modes &
3123                                         BIT(NL80211_IFTYPE_P2P_CLIENT)))
3124                 return -EOPNOTSUPP;
3125
3126         mutex_lock(&priv->mutex);
3127
3128         if (priv->contexts[IWL_RXON_CTX_PAN].is_active ||
3129             test_bit(STATUS_SCAN_HW, &priv->status)) {
3130                 err = -EBUSY;
3131                 goto out;
3132         }
3133
3134         priv->contexts[IWL_RXON_CTX_PAN].is_active = true;
3135         priv->_agn.hw_roc_channel = channel;
3136         priv->_agn.hw_roc_chantype = channel_type;
3137         priv->_agn.hw_roc_duration = DIV_ROUND_UP(duration * 1000, 1024);
3138         iwlagn_commit_rxon(priv, &priv->contexts[IWL_RXON_CTX_PAN]);
3139         queue_delayed_work(priv->workqueue, &priv->_agn.hw_roc_work,
3140                            msecs_to_jiffies(duration + 20));
3141
3142         msleep(IWL_MIN_SLOT_TIME); /* TU is almost ms */
3143         ieee80211_ready_on_channel(priv->hw);
3144
3145  out:
3146         mutex_unlock(&priv->mutex);
3147
3148         return err;
3149 }
3150
3151 static int iwl_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
3152 {
3153         struct iwl_priv *priv = hw->priv;
3154
3155         if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
3156                 return -EOPNOTSUPP;
3157
3158         cancel_delayed_work_sync(&priv->_agn.hw_roc_work);
3159
3160         mutex_lock(&priv->mutex);
3161         iwlagn_disable_roc(priv);
3162         mutex_unlock(&priv->mutex);
3163
3164         return 0;
3165 }
3166
3167 /*****************************************************************************
3168  *
3169  * driver setup and teardown
3170  *
3171  *****************************************************************************/
3172
3173 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3174 {
3175         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3176
3177         init_waitqueue_head(&priv->wait_command_queue);
3178
3179         INIT_WORK(&priv->restart, iwl_bg_restart);
3180         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3181         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3182         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3183         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
3184         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
3185         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
3186         INIT_DELAYED_WORK(&priv->_agn.hw_roc_work, iwlagn_bg_roc_done);
3187
3188         iwl_setup_scan_deferred_work(priv);
3189
3190         if (priv->cfg->ops->lib->setup_deferred_work)
3191                 priv->cfg->ops->lib->setup_deferred_work(priv);
3192
3193         init_timer(&priv->statistics_periodic);
3194         priv->statistics_periodic.data = (unsigned long)priv;
3195         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3196
3197         init_timer(&priv->ucode_trace);
3198         priv->ucode_trace.data = (unsigned long)priv;
3199         priv->ucode_trace.function = iwl_bg_ucode_trace;
3200
3201         init_timer(&priv->watchdog);
3202         priv->watchdog.data = (unsigned long)priv;
3203         priv->watchdog.function = iwl_bg_watchdog;
3204
3205         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3206                 iwl_irq_tasklet, (unsigned long)priv);
3207 }
3208
3209 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3210 {
3211         if (priv->cfg->ops->lib->cancel_deferred_work)
3212                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3213
3214         cancel_work_sync(&priv->run_time_calib_work);
3215         cancel_work_sync(&priv->beacon_update);
3216
3217         iwl_cancel_scan_deferred_work(priv);
3218
3219         cancel_work_sync(&priv->bt_full_concurrency);
3220         cancel_work_sync(&priv->bt_runtime_config);
3221
3222         del_timer_sync(&priv->statistics_periodic);
3223         del_timer_sync(&priv->ucode_trace);
3224 }
3225
3226 static void iwl_init_hw_rates(struct iwl_priv *priv,
3227                               struct ieee80211_rate *rates)
3228 {
3229         int i;
3230
3231         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
3232                 rates[i].bitrate = iwl_rates[i].ieee * 5;
3233                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
3234                 rates[i].hw_value_short = i;
3235                 rates[i].flags = 0;
3236                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
3237                         /*
3238                          * If CCK != 1M then set short preamble rate flag.
3239                          */
3240                         rates[i].flags |=
3241                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
3242                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
3243                 }
3244         }
3245 }
3246
3247 static int iwl_init_drv(struct iwl_priv *priv)
3248 {
3249         int ret;
3250
3251         spin_lock_init(&priv->sta_lock);
3252         spin_lock_init(&priv->hcmd_lock);
3253
3254         mutex_init(&priv->mutex);
3255
3256         priv->ieee_channels = NULL;
3257         priv->ieee_rates = NULL;
3258         priv->band = IEEE80211_BAND_2GHZ;
3259
3260         priv->iw_mode = NL80211_IFTYPE_STATION;
3261         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
3262         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3263         priv->_agn.agg_tids_count = 0;
3264
3265         /* initialize force reset */
3266         priv->force_reset[IWL_RF_RESET].reset_duration =
3267                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3268         priv->force_reset[IWL_FW_RESET].reset_duration =
3269                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3270
3271         priv->rx_statistics_jiffies = jiffies;
3272
3273         /* Choose which receivers/antennas to use */
3274         if (priv->cfg->ops->hcmd->set_rxon_chain)
3275                 priv->cfg->ops->hcmd->set_rxon_chain(priv,
3276                                         &priv->contexts[IWL_RXON_CTX_BSS]);
3277
3278         iwl_init_scan_params(priv);
3279
3280         /* init bt coex */
3281         if (priv->cfg->bt_params &&
3282             priv->cfg->bt_params->advanced_bt_coexist) {
3283                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
3284                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
3285                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
3286                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
3287                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
3288                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
3289         }
3290
3291         ret = iwl_init_channel_map(priv);
3292         if (ret) {
3293                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3294                 goto err;
3295         }
3296
3297         ret = iwlcore_init_geos(priv);
3298         if (ret) {
3299                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3300                 goto err_free_channel_map;
3301         }
3302         iwl_init_hw_rates(priv, priv->ieee_rates);
3303
3304         return 0;
3305
3306 err_free_channel_map:
3307         iwl_free_channel_map(priv);
3308 err:
3309         return ret;
3310 }
3311
3312 static void iwl_uninit_drv(struct iwl_priv *priv)
3313 {
3314         iwl_calib_free_results(priv);
3315         iwlcore_free_geos(priv);
3316         iwl_free_channel_map(priv);
3317         kfree(priv->scan_cmd);
3318         kfree(priv->beacon_cmd);
3319 }
3320
3321 struct ieee80211_ops iwlagn_hw_ops = {
3322         .tx = iwlagn_mac_tx,
3323         .start = iwlagn_mac_start,
3324         .stop = iwlagn_mac_stop,
3325         .add_interface = iwl_mac_add_interface,
3326         .remove_interface = iwl_mac_remove_interface,
3327         .change_interface = iwl_mac_change_interface,
3328         .config = iwlagn_mac_config,
3329         .configure_filter = iwlagn_configure_filter,
3330         .set_key = iwlagn_mac_set_key,
3331         .update_tkip_key = iwlagn_mac_update_tkip_key,
3332         .conf_tx = iwl_mac_conf_tx,
3333         .bss_info_changed = iwlagn_bss_info_changed,
3334         .ampdu_action = iwlagn_mac_ampdu_action,
3335         .hw_scan = iwl_mac_hw_scan,
3336         .sta_notify = iwlagn_mac_sta_notify,
3337         .sta_add = iwlagn_mac_sta_add,
3338         .sta_remove = iwl_mac_sta_remove,
3339         .channel_switch = iwlagn_mac_channel_switch,
3340         .flush = iwlagn_mac_flush,
3341         .tx_last_beacon = iwl_mac_tx_last_beacon,
3342         .remain_on_channel = iwl_mac_remain_on_channel,
3343         .cancel_remain_on_channel = iwl_mac_cancel_remain_on_channel,
3344         .offchannel_tx = iwl_mac_offchannel_tx,
3345         .offchannel_tx_cancel_wait = iwl_mac_offchannel_tx_cancel_wait,
3346         CFG80211_TESTMODE_CMD(iwl_testmode_cmd)
3347         CFG80211_TESTMODE_DUMP(iwl_testmode_dump)
3348 };
3349
3350 static u32 iwl_hw_detect(struct iwl_priv *priv)
3351 {
3352         return iwl_read32(priv, CSR_HW_REV);
3353 }
3354
3355 static int iwl_set_hw_params(struct iwl_priv *priv)
3356 {
3357         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
3358         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
3359         if (iwlagn_mod_params.amsdu_size_8K)
3360                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
3361         else
3362                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
3363
3364         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
3365
3366         if (iwlagn_mod_params.disable_11n)
3367                 priv->cfg->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
3368
3369         /* Device-specific setup */
3370         return priv->cfg->ops->lib->set_hw_params(priv);
3371 }
3372
3373 static const u8 iwlagn_bss_ac_to_fifo[] = {
3374         IWL_TX_FIFO_VO,
3375         IWL_TX_FIFO_VI,
3376         IWL_TX_FIFO_BE,
3377         IWL_TX_FIFO_BK,
3378 };
3379
3380 static const u8 iwlagn_bss_ac_to_queue[] = {
3381         0, 1, 2, 3,
3382 };
3383
3384 static const u8 iwlagn_pan_ac_to_fifo[] = {
3385         IWL_TX_FIFO_VO_IPAN,
3386         IWL_TX_FIFO_VI_IPAN,
3387         IWL_TX_FIFO_BE_IPAN,
3388         IWL_TX_FIFO_BK_IPAN,
3389 };
3390
3391 static const u8 iwlagn_pan_ac_to_queue[] = {
3392         7, 6, 5, 4,
3393 };
3394
3395 /* This function both allocates and initializes hw and priv. */
3396 static struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg)
3397 {
3398         struct iwl_priv *priv;
3399         /* mac80211 allocates memory for this device instance, including
3400          *   space for this driver's private structure */
3401         struct ieee80211_hw *hw;
3402
3403         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
3404         if (hw == NULL) {
3405                 pr_err("%s: Can not allocate network device\n",
3406                        cfg->name);
3407                 goto out;
3408         }
3409
3410         priv = hw->priv;
3411         priv->hw = hw;
3412
3413 out:
3414         return hw;
3415 }
3416
3417 static void iwl_init_context(struct iwl_priv *priv)
3418 {
3419         int i;
3420
3421         /*
3422          * The default context is always valid,
3423          * more may be discovered when firmware
3424          * is loaded.
3425          */
3426         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3427
3428         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3429                 priv->contexts[i].ctxid = i;
3430
3431         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
3432         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
3433         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3434         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3435         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3436         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3437         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3438         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3439         priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo = iwlagn_bss_ac_to_fifo;
3440         priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue = iwlagn_bss_ac_to_queue;
3441         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
3442                 BIT(NL80211_IFTYPE_ADHOC);
3443         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3444                 BIT(NL80211_IFTYPE_STATION);
3445         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
3446         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3447         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3448         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3449
3450         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
3451         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
3452                 REPLY_WIPAN_RXON_TIMING;
3453         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
3454                 REPLY_WIPAN_RXON_ASSOC;
3455         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
3456         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
3457         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
3458         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
3459         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
3460         priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo = iwlagn_pan_ac_to_fifo;
3461         priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue = iwlagn_pan_ac_to_queue;
3462         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
3463         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
3464                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
3465 #ifdef CONFIG_IWL_P2P
3466         priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
3467                 BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO);
3468 #endif
3469         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
3470         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
3471         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
3472
3473         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
3474 }
3475
3476 int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
3477                 struct iwl_cfg *cfg)
3478 {
3479         int err = 0;
3480         struct iwl_priv *priv;
3481         struct ieee80211_hw *hw;
3482         u16 num_mac;
3483         u32 hw_rev;
3484
3485         /************************
3486          * 1. Allocating HW data
3487          ************************/
3488         hw = iwl_alloc_all(cfg);
3489         if (!hw) {
3490                 err = -ENOMEM;
3491                 goto out;       }
3492         priv = hw->priv;
3493
3494         priv->bus.priv = priv;
3495         priv->bus.bus_specific = bus_specific;
3496         priv->bus.ops = bus_ops;
3497         priv->bus.ops->set_drv_data(&priv->bus, priv);
3498         priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
3499
3500         /* At this point both hw and priv are allocated. */
3501
3502         SET_IEEE80211_DEV(hw, priv->bus.dev);
3503
3504         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3505         priv->cfg = cfg;
3506         priv->inta_mask = CSR_INI_SET_MASK;
3507
3508         /* is antenna coupling more than 35dB ? */
3509         priv->bt_ant_couple_ok =
3510                 (iwlagn_ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
3511                 true : false;
3512
3513         /* enable/disable bt channel inhibition */
3514         priv->bt_ch_announce = iwlagn_bt_ch_announce;
3515         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
3516                        (priv->bt_ch_announce) ? "On" : "Off");
3517
3518         if (iwl_alloc_traffic_mem(priv))
3519                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3520
3521
3522         /* these spin locks will be used in apm_ops.init and EEPROM access
3523          * we should init now
3524          */
3525         spin_lock_init(&priv->reg_lock);
3526         spin_lock_init(&priv->lock);
3527
3528         /*
3529          * stop and reset the on-board processor just in case it is in a
3530          * strange state ... like being left stranded by a primary kernel
3531          * and this is now the kdump kernel trying to start up
3532          */
3533         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3534
3535         /***********************
3536          * 3. Read REV register
3537          ***********************/
3538         hw_rev = iwl_hw_detect(priv);
3539         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
3540                 priv->cfg->name, hw_rev);
3541
3542         if (iwl_prepare_card_hw(priv)) {
3543                 IWL_WARN(priv, "Failed, HW not ready\n");
3544                 goto out_free_traffic_mem;
3545         }
3546
3547         /*****************
3548          * 4. Read EEPROM
3549          *****************/
3550         /* Read the EEPROM */
3551         err = iwl_eeprom_init(priv, hw_rev);
3552         if (err) {
3553                 IWL_ERR(priv, "Unable to init EEPROM\n");
3554                 goto out_free_traffic_mem;
3555         }
3556         err = iwl_eeprom_check_version(priv);
3557         if (err)
3558                 goto out_free_eeprom;
3559
3560         err = iwl_eeprom_check_sku(priv);
3561         if (err)
3562                 goto out_free_eeprom;
3563
3564         /* extract MAC Address */
3565         iwl_eeprom_get_mac(priv, priv->addresses[0].addr);
3566         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
3567         priv->hw->wiphy->addresses = priv->addresses;
3568         priv->hw->wiphy->n_addresses = 1;
3569         num_mac = iwl_eeprom_query16(priv, EEPROM_NUM_MAC_ADDRESS);
3570         if (num_mac > 1) {
3571                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
3572                        ETH_ALEN);
3573                 priv->addresses[1].addr[5]++;
3574                 priv->hw->wiphy->n_addresses++;
3575         }
3576
3577         /* initialize all valid contexts */
3578         iwl_init_context(priv);
3579
3580         /************************
3581          * 5. Setup HW constants
3582          ************************/
3583         if (iwl_set_hw_params(priv)) {
3584                 err = -ENOENT;
3585                 IWL_ERR(priv, "failed to set hw parameters\n");
3586                 goto out_free_eeprom;
3587         }
3588
3589         /*******************
3590          * 6. Setup priv
3591          *******************/
3592
3593         err = iwl_init_drv(priv);
3594         if (err)
3595                 goto out_free_eeprom;
3596         /* At this point both hw and priv are initialized. */
3597
3598         /********************
3599          * 7. Setup services
3600          ********************/
3601         iwl_alloc_isr_ict(priv);
3602
3603         err = request_irq(priv->bus.ops->get_irq(&priv->bus), iwl_isr_ict,
3604                           IRQF_SHARED, DRV_NAME, priv);
3605         if (err) {
3606                 IWL_ERR(priv, "Error allocating IRQ %d\n",
3607                         priv->bus.ops->get_irq(&priv->bus));
3608                 goto out_uninit_drv;
3609         }
3610
3611         iwl_setup_deferred_work(priv);
3612         iwl_setup_rx_handlers(priv);
3613         iwl_testmode_init(priv);
3614
3615         /*********************************************
3616          * 8. Enable interrupts
3617          *********************************************/
3618
3619         iwl_enable_rfkill_int(priv);
3620
3621         /* If platform's RF_KILL switch is NOT set to KILL */
3622         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3623                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3624         else
3625                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3626
3627         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
3628                 test_bit(STATUS_RF_KILL_HW, &priv->status));
3629
3630         iwl_power_initialize(priv);
3631         iwl_tt_initialize(priv);
3632
3633         init_completion(&priv->_agn.firmware_loading_complete);
3634
3635         err = iwl_request_firmware(priv, true);
3636         if (err)
3637                 goto out_destroy_workqueue;
3638
3639         return 0;
3640
3641  out_destroy_workqueue:
3642         destroy_workqueue(priv->workqueue);
3643         priv->workqueue = NULL;
3644         free_irq(priv->bus.ops->get_irq(&priv->bus), priv);
3645         iwl_free_isr_ict(priv);
3646  out_uninit_drv:
3647         iwl_uninit_drv(priv);
3648  out_free_eeprom:
3649         iwl_eeprom_free(priv);
3650  out_free_traffic_mem:
3651         iwl_free_traffic_mem(priv);
3652         ieee80211_free_hw(priv->hw);
3653  out:
3654         return err;
3655 }
3656
3657 void __devexit iwl_remove(struct iwl_priv * priv)
3658 {
3659         unsigned long flags;
3660
3661         wait_for_completion(&priv->_agn.firmware_loading_complete);
3662
3663         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3664
3665         iwl_dbgfs_unregister(priv);
3666         sysfs_remove_group(&priv->bus.dev->kobj,
3667                            &iwl_attribute_group);
3668
3669         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3670          * to be called and iwl_down since we are removing the device
3671          * we need to set STATUS_EXIT_PENDING bit.
3672          */
3673         set_bit(STATUS_EXIT_PENDING, &priv->status);
3674
3675         iwl_testmode_cleanup(priv);
3676         iwl_leds_exit(priv);
3677
3678         if (priv->mac80211_registered) {
3679                 ieee80211_unregister_hw(priv->hw);
3680                 priv->mac80211_registered = 0;
3681         }
3682
3683         /* Reset to low power before unloading driver. */
3684         iwl_apm_stop(priv);
3685
3686         iwl_tt_exit(priv);
3687
3688         /* make sure we flush any pending irq or
3689          * tasklet for the driver
3690          */
3691         spin_lock_irqsave(&priv->lock, flags);
3692         iwl_disable_interrupts(priv);
3693         spin_unlock_irqrestore(&priv->lock, flags);
3694
3695         iwl_synchronize_irq(priv);
3696
3697         iwl_dealloc_ucode(priv);
3698
3699         if (priv->rxq.bd)
3700                 iwlagn_rx_queue_free(priv, &priv->rxq);
3701         iwlagn_hw_txq_ctx_free(priv);
3702
3703         iwl_eeprom_free(priv);
3704
3705
3706         /*netif_stop_queue(dev); */
3707         flush_workqueue(priv->workqueue);
3708
3709         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3710          * priv->workqueue... so we can't take down the workqueue
3711          * until now... */
3712         destroy_workqueue(priv->workqueue);
3713         priv->workqueue = NULL;
3714         iwl_free_traffic_mem(priv);
3715
3716         free_irq(priv->bus.ops->get_irq(&priv->bus), priv);
3717         priv->bus.ops->set_drv_data(&priv->bus, NULL);
3718
3719         iwl_uninit_drv(priv);
3720
3721         iwl_free_isr_ict(priv);
3722
3723         dev_kfree_skb(priv->beacon_skb);
3724
3725         ieee80211_free_hw(priv->hw);
3726 }
3727
3728
3729 /*****************************************************************************
3730  *
3731  * driver and module entry point
3732  *
3733  *****************************************************************************/
3734 static int __init iwl_init(void)
3735 {
3736
3737         int ret;
3738         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
3739         pr_info(DRV_COPYRIGHT "\n");
3740
3741         ret = iwlagn_rate_control_register();
3742         if (ret) {
3743                 pr_err("Unable to register rate control algorithm: %d\n", ret);
3744                 return ret;
3745         }
3746
3747         ret = iwl_pci_register_driver();
3748
3749         if (ret)
3750                 goto error_register;
3751         return ret;
3752
3753 error_register:
3754         iwlagn_rate_control_unregister();
3755         return ret;
3756 }
3757
3758 static void __exit iwl_exit(void)
3759 {
3760         iwl_pci_unregister_driver();
3761         iwlagn_rate_control_unregister();
3762 }
3763
3764 module_exit(iwl_exit);
3765 module_init(iwl_init);
3766
3767 #ifdef CONFIG_IWLWIFI_DEBUG
3768 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
3769 MODULE_PARM_DESC(debug, "debug output mask");
3770 #endif
3771
3772 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
3773 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
3774 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
3775 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3776 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, int, S_IRUGO);
3777 MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
3778 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
3779                    int, S_IRUGO);
3780 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3781 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
3782 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
3783
3784 module_param_named(ucode_alternative, iwlagn_wanted_ucode_alternative, int,
3785                    S_IRUGO);
3786 MODULE_PARM_DESC(ucode_alternative,
3787                  "specify ucode alternative to use from ucode file");
3788
3789 module_param_named(antenna_coupling, iwlagn_ant_coupling, int, S_IRUGO);
3790 MODULE_PARM_DESC(antenna_coupling,
3791                  "specify antenna coupling in dB (defualt: 0 dB)");
3792
3793 module_param_named(bt_ch_inhibition, iwlagn_bt_ch_announce, bool, S_IRUGO);
3794 MODULE_PARM_DESC(bt_ch_inhibition,
3795                  "Disable BT channel inhibition (default: enable)");
3796
3797 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
3798 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
3799
3800 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
3801 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
3802
3803 /*
3804  * set bt_coex_active to true, uCode will do kill/defer
3805  * every time the priority line is asserted (BT is sending signals on the
3806  * priority line in the PCIx).
3807  * set bt_coex_active to false, uCode will ignore the BT activity and
3808  * perform the normal operation
3809  *
3810  * User might experience transmit issue on some platform due to WiFi/BT
3811  * co-exist problem. The possible behaviors are:
3812  *   Able to scan and finding all the available AP
3813  *   Not able to associate with any AP
3814  * On those platforms, WiFi communication can be restored by set
3815  * "bt_coex_active" module parameter to "false"
3816  *
3817  * default: bt_coex_active = true (BT_COEX_ENABLE)
3818  */
3819 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
3820                 bool, S_IRUGO);
3821 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
3822
3823 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
3824 MODULE_PARM_DESC(led_mode, "0=system default, "
3825                 "1=On(RF On)/Off(RF Off), 2=blinking (default: 0)");
3826
3827 /*
3828  * For now, keep using power level 1 instead of automatically
3829  * adjusting ...
3830  */
3831 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
3832                 bool, S_IRUGO);
3833 MODULE_PARM_DESC(no_sleep_autoadjust,
3834                  "don't automatically adjust sleep level "
3835                  "according to maximum network latency (default: true)");