drivers/net/wireless/iwlwifi/dvm/main.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 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/delay.h>
  37 #include <linux/sched.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #include "iwl-eeprom-read.h"
  48 #include "iwl-eeprom-parse.h"
  49 #include "iwl-io.h"
  50 #include "iwl-trans.h"
  51 #include "iwl-op-mode.h"
  52 #include "iwl-drv.h"
  53 #include "iwl-modparams.h"
  54 #include "iwl-prph.h"
  55
  56 #include "dev.h"
  57 #include "calib.h"
  58 #include "agn.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 const struct iwl_op_mode_ops iwl_dvm_ops;
  87
  88 void iwl_update_chain_flags(struct iwl_priv *priv)
  89 {
  90         struct iwl_rxon_context *ctx;
  91
  92         for_each_context(priv, ctx) {
  93                 iwlagn_set_rxon_chain(priv, ctx);
  94                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
  95                         iwlagn_commit_rxon(priv, ctx);
  96         }
  97 }
  98
  99 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 100 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 101                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 102                                u8 *beacon, u32 frame_size)
 103 {
 104         u16 tim_idx;
 105         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 106
 107         /*
 108          * The index is relative to frame start but we start looking at the
 109          * variable-length part of the beacon.
 110          */
 111         tim_idx = mgmt->u.beacon.variable - beacon;
 112
 113         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 114         while ((tim_idx < (frame_size - 2)) &&
 115                         (beacon[tim_idx] != WLAN_EID_TIM))
 116                 tim_idx += beacon[tim_idx+1] + 2;
 117
 118         /* If TIM field was found, set variables */
 119         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 120                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 121                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 122         } else
 123                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 124 }
 125
 126 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 127 {
 128         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 129         struct iwl_host_cmd cmd = {
 130                 .id = REPLY_TX_BEACON,
 131         };
 132         struct ieee80211_tx_info *info;
 133         u32 frame_size;
 134         u32 rate_flags;
 135         u32 rate;
 136
 137         /*
 138          * We have to set up the TX command, the TX Beacon command, and the
 139          * beacon contents.
 140          */
 141
 142         lockdep_assert_held(&priv->mutex);
 143
 144         if (!priv->beacon_ctx) {
 145                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 146                 return 0;
 147         }
 148
 149         if (WARN_ON(!priv->beacon_skb))
 150                 return -EINVAL;
 151
 152         /* Allocate beacon command */
 153         if (!priv->beacon_cmd)
 154                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 155         tx_beacon_cmd = priv->beacon_cmd;
 156         if (!tx_beacon_cmd)
 157                 return -ENOMEM;
 158
 159         frame_size = priv->beacon_skb->len;
 160
 161         /* Set up TX command fields */
 162         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 163         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 164         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 165         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 166                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 167
 168         /* Set up TX beacon command fields */
 169         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 170                            frame_size);
 171
 172         /* Set up packet rate and flags */
 173         info = IEEE80211_SKB_CB(priv->beacon_skb);
 174
 175         /*
 176          * Let's set up the rate at least somewhat correctly;
 177          * it will currently not actually be used by the uCode,
 178          * it uses the broadcast station's rate instead.
 179          */
 180         if (info->control.rates[0].idx < 0 ||
 181             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 182                 rate = 0;
 183         else
 184                 rate = info->control.rates[0].idx;
 185
 186         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 187                                               priv->nvm_data->valid_tx_ant);
 188         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 189
 190         /* In mac80211, rates for 5 GHz start at 0 */
 191         if (info->band == IEEE80211_BAND_5GHZ)
 192                 rate += IWL_FIRST_OFDM_RATE;
 193         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 194                 rate_flags |= RATE_MCS_CCK_MSK;
 195
 196         tx_beacon_cmd->tx.rate_n_flags =
 197                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 198
 199         /* Submit command */
 200         cmd.len[0] = sizeof(*tx_beacon_cmd);
 201         cmd.data[0] = tx_beacon_cmd;
 202         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 203         cmd.len[1] = frame_size;
 204         cmd.data[1] = priv->beacon_skb->data;
 205         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 206
 207         return iwl_dvm_send_cmd(priv, &cmd);
 208 }
 209
 210 static void iwl_bg_beacon_update(struct work_struct *work)
 211 {
 212         struct iwl_priv *priv =
 213                 container_of(work, struct iwl_priv, beacon_update);
 214         struct sk_buff *beacon;
 215
 216         mutex_lock(&priv->mutex);
 217         if (!priv->beacon_ctx) {
 218                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 219                 goto out;
 220         }
 221
 222         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 223                 /*
 224                  * The ucode will send beacon notifications even in
 225                  * IBSS mode, but we don't want to process them. But
 226                  * we need to defer the type check to here due to
 227                  * requiring locking around the beacon_ctx access.
 228                  */
 229                 goto out;
 230         }
 231
 232         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 233         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 234         if (!beacon) {
 235                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 236                 goto out;
 237         }
 238
 239         /* new beacon skb is allocated every time; dispose previous.*/
 240         dev_kfree_skb(priv->beacon_skb);
 241
 242         priv->beacon_skb = beacon;
 243
 244         iwlagn_send_beacon_cmd(priv);
 245  out:
 246         mutex_unlock(&priv->mutex);
 247 }
 248
 249 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 250 {
 251         struct iwl_priv *priv =
 252                 container_of(work, struct iwl_priv, bt_runtime_config);
 253
 254         mutex_lock(&priv->mutex);
 255         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 256                 goto out;
 257
 258         /* dont send host command if rf-kill is on */
 259         if (!iwl_is_ready_rf(priv))
 260                 goto out;
 261
 262         iwlagn_send_advance_bt_config(priv);
 263 out:
 264         mutex_unlock(&priv->mutex);
 265 }
 266
 267 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 268 {
 269         struct iwl_priv *priv =
 270                 container_of(work, struct iwl_priv, bt_full_concurrency);
 271         struct iwl_rxon_context *ctx;
 272
 273         mutex_lock(&priv->mutex);
 274
 275         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 276                 goto out;
 277
 278         /* dont send host command if rf-kill is on */
 279         if (!iwl_is_ready_rf(priv))
 280                 goto out;
 281
 282         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 283                        priv->bt_full_concurrent ?
 284                        "full concurrency" : "3-wire");
 285
 286         /*
 287          * LQ & RXON updated cmds must be sent before BT Config cmd
 288          * to avoid 3-wire collisions
 289          */
 290         for_each_context(priv, ctx) {
 291                 iwlagn_set_rxon_chain(priv, ctx);
 292                 iwlagn_commit_rxon(priv, ctx);
 293         }
 294
 295         iwlagn_send_advance_bt_config(priv);
 296 out:
 297         mutex_unlock(&priv->mutex);
 298 }
 299
 300 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
 301 {
 302         struct iwl_statistics_cmd statistics_cmd = {
 303                 .configuration_flags =
 304                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
 305         };
 306
 307         if (flags & CMD_ASYNC)
 308                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 309                                         CMD_ASYNC,
 310                                         sizeof(struct iwl_statistics_cmd),
 311                                         &statistics_cmd);
 312         else
 313                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD, 0,
 314                                         sizeof(struct iwl_statistics_cmd),
 315                                         &statistics_cmd);
 316 }
 317
 318 /**
 319  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 320  *
 321  * This callback is provided in order to send a statistics request.
 322  *
 323  * This timer function is continually reset to execute within
 324  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 325  * was received.  We need to ensure we receive the statistics in order
 326  * to update the temperature used for calibrating the TXPOWER.
 327  */
 328 static void iwl_bg_statistics_periodic(unsigned long data)
 329 {
 330         struct iwl_priv *priv = (struct iwl_priv *)data;
 331
 332         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 333                 return;
 334
 335         /* dont send host command if rf-kill is on */
 336         if (!iwl_is_ready_rf(priv))
 337                 return;
 338
 339         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 340 }
 341
 342
 343 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 344                                         u32 start_idx, u32 num_events,
 345                                         u32 capacity, u32 mode)
 346 {
 347         u32 i;
 348         u32 ptr;        /* SRAM byte address of log data */
 349         u32 ev, time, data; /* event log data */
 350         unsigned long reg_flags;
 351
 352         if (mode == 0)
 353                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 354         else
 355                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 356
 357         /* Make sure device is powered up for SRAM reads */
 358         if (!iwl_trans_grab_nic_access(priv->trans, false, &reg_flags))
 359                 return;
 360
 361         /* Set starting address; reads will auto-increment */
 362         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, ptr);
 363
 364         /*
 365          * Refuse to read more than would have fit into the log from
 366          * the current start_idx. This used to happen due to the race
 367          * described below, but now WARN because the code below should
 368          * prevent it from happening here.
 369          */
 370         if (WARN_ON(num_events > capacity - start_idx))
 371                 num_events = capacity - start_idx;
 372
 373         /*
 374          * "time" is actually "data" for mode 0 (no timestamp).
 375          * place event id # at far right for easier visual parsing.
 376          */
 377         for (i = 0; i < num_events; i++) {
 378                 ev = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 379                 time = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 380                 if (mode == 0) {
 381                         trace_iwlwifi_dev_ucode_cont_event(
 382                                         priv->trans->dev, 0, time, ev);
 383                 } else {
 384                         data = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 385                         trace_iwlwifi_dev_ucode_cont_event(
 386                                         priv->trans->dev, time, data, ev);
 387                 }
 388         }
 389         /* Allow device to power down */
 390         iwl_trans_release_nic_access(priv->trans, &reg_flags);
 391 }
 392
 393 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 394 {
 395         u32 capacity;   /* event log capacity in # entries */
 396         struct {
 397                 u32 capacity;
 398                 u32 mode;
 399                 u32 wrap_counter;
 400                 u32 write_counter;
 401         } __packed read;
 402         u32 base;       /* SRAM byte address of event log header */
 403         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 404         u32 num_wraps;  /* # times uCode wrapped to top of log */
 405         u32 next_entry; /* index of next entry to be written by uCode */
 406
 407         base = priv->device_pointers.log_event_table;
 408         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 409                 iwl_trans_read_mem_bytes(priv->trans, base,
 410                                          &read, sizeof(read));
 411                 capacity = read.capacity;
 412                 mode = read.mode;
 413                 num_wraps = read.wrap_counter;
 414                 next_entry = read.write_counter;
 415         } else
 416                 return;
 417
 418         /*
 419          * Unfortunately, the uCode doesn't use temporary variables.
 420          * Therefore, it can happen that we read next_entry == capacity,
 421          * which really means next_entry == 0.
 422          */
 423         if (unlikely(next_entry == capacity))
 424                 next_entry = 0;
 425         /*
 426          * Additionally, the uCode increases the write pointer before
 427          * the wraps counter, so if the write pointer is smaller than
 428          * the old write pointer (wrap occurred) but we read that no
 429          * wrap occurred, we actually read between the next_entry and
 430          * num_wraps update (this does happen in practice!!) -- take
 431          * that into account by increasing num_wraps.
 432          */
 433         if (unlikely(next_entry < priv->event_log.next_entry &&
 434                      num_wraps == priv->event_log.num_wraps))
 435                 num_wraps++;
 436
 437         if (num_wraps == priv->event_log.num_wraps) {
 438                 iwl_print_cont_event_trace(
 439                         priv, base, priv->event_log.next_entry,
 440                         next_entry - priv->event_log.next_entry,
 441                         capacity, mode);
 442
 443                 priv->event_log.non_wraps_count++;
 444         } else {
 445                 if (num_wraps - priv->event_log.num_wraps > 1)
 446                         priv->event_log.wraps_more_count++;
 447                 else
 448                         priv->event_log.wraps_once_count++;
 449
 450                 trace_iwlwifi_dev_ucode_wrap_event(priv->trans->dev,
 451                                 num_wraps - priv->event_log.num_wraps,
 452                                 next_entry, priv->event_log.next_entry);
 453
 454                 if (next_entry < priv->event_log.next_entry) {
 455                         iwl_print_cont_event_trace(
 456                                 priv, base, priv->event_log.next_entry,
 457                                 capacity - priv->event_log.next_entry,
 458                                 capacity, mode);
 459
 460                         iwl_print_cont_event_trace(
 461                                 priv, base, 0, next_entry, capacity, mode);
 462                 } else {
 463                         iwl_print_cont_event_trace(
 464                                 priv, base, next_entry,
 465                                 capacity - next_entry,
 466                                 capacity, mode);
 467
 468                         iwl_print_cont_event_trace(
 469                                 priv, base, 0, next_entry, capacity, mode);
 470                 }
 471         }
 472
 473         priv->event_log.num_wraps = num_wraps;
 474         priv->event_log.next_entry = next_entry;
 475 }
 476
 477 /**
 478  * iwl_bg_ucode_trace - Timer callback to log ucode event
 479  *
 480  * The timer is continually set to execute every
 481  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 482  * this function is to perform continuous uCode event logging operation
 483  * if enabled
 484  */
 485 static void iwl_bg_ucode_trace(unsigned long data)
 486 {
 487         struct iwl_priv *priv = (struct iwl_priv *)data;
 488
 489         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 490                 return;
 491
 492         if (priv->event_log.ucode_trace) {
 493                 iwl_continuous_event_trace(priv);
 494                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 495                 mod_timer(&priv->ucode_trace,
 496                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 497         }
 498 }
 499
 500 static void iwl_bg_tx_flush(struct work_struct *work)
 501 {
 502         struct iwl_priv *priv =
 503                 container_of(work, struct iwl_priv, tx_flush);
 504
 505         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 506                 return;
 507
 508         /* do nothing if rf-kill is on */
 509         if (!iwl_is_ready_rf(priv))
 510                 return;
 511
 512         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 513         iwlagn_dev_txfifo_flush(priv);
 514 }
 515
 516 /*
 517  * queue/FIFO/AC mapping definitions
 518  */
 519
 520 static const u8 iwlagn_bss_ac_to_fifo[] = {
 521         IWL_TX_FIFO_VO,
 522         IWL_TX_FIFO_VI,
 523         IWL_TX_FIFO_BE,
 524         IWL_TX_FIFO_BK,
 525 };
 526
 527 static const u8 iwlagn_bss_ac_to_queue[] = {
 528         0, 1, 2, 3,
 529 };
 530
 531 static const u8 iwlagn_pan_ac_to_fifo[] = {
 532         IWL_TX_FIFO_VO_IPAN,
 533         IWL_TX_FIFO_VI_IPAN,
 534         IWL_TX_FIFO_BE_IPAN,
 535         IWL_TX_FIFO_BK_IPAN,
 536 };
 537
 538 static const u8 iwlagn_pan_ac_to_queue[] = {
 539         7, 6, 5, 4,
 540 };
 541
 542 static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 543 {
 544         int i;
 545
 546         /*
 547          * The default context is always valid,
 548          * the PAN context depends on uCode.
 549          */
 550         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
 551         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
 552                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
 553
 554         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
 555                 priv->contexts[i].ctxid = i;
 556
 557         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
 558         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
 559         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
 560         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
 561         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
 562         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
 563         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
 564         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 565         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 566         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
 567                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_MONITOR);
 568         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 569                 BIT(NL80211_IFTYPE_STATION);
 570         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
 571         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
 572         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
 573         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
 574         memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue,
 575                iwlagn_bss_ac_to_queue, sizeof(iwlagn_bss_ac_to_queue));
 576         memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo,
 577                iwlagn_bss_ac_to_fifo, sizeof(iwlagn_bss_ac_to_fifo));
 578
 579         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
 580         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
 581                 REPLY_WIPAN_RXON_TIMING;
 582         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
 583                 REPLY_WIPAN_RXON_ASSOC;
 584         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
 585         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
 586         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
 587         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
 588         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
 589         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
 590                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
 591
 592         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
 593         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
 594         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
 595         memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue,
 596                iwlagn_pan_ac_to_queue, sizeof(iwlagn_pan_ac_to_queue));
 597         memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo,
 598                iwlagn_pan_ac_to_fifo, sizeof(iwlagn_pan_ac_to_fifo));
 599         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
 600
 601         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 602 }
 603
 604 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
 605 {
 606         struct iwl_ct_kill_config cmd;
 607         struct iwl_ct_kill_throttling_config adv_cmd;
 608         int ret = 0;
 609
 610         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 611                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 612
 613         priv->thermal_throttle.ct_kill_toggle = false;
 614
 615         if (priv->lib->support_ct_kill_exit) {
 616                 adv_cmd.critical_temperature_enter =
 617                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
 618                 adv_cmd.critical_temperature_exit =
 619                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
 620
 621                 ret = iwl_dvm_send_cmd_pdu(priv,
 622                                        REPLY_CT_KILL_CONFIG_CMD,
 623                                        0, sizeof(adv_cmd), &adv_cmd);
 624                 if (ret)
 625                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 626                 else
 627                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 628                                 "succeeded, critical temperature enter is %d,"
 629                                 "exit is %d\n",
 630                                 priv->hw_params.ct_kill_threshold,
 631                                 priv->hw_params.ct_kill_exit_threshold);
 632         } else {
 633                 cmd.critical_temperature_R =
 634                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
 635
 636                 ret = iwl_dvm_send_cmd_pdu(priv,
 637                                        REPLY_CT_KILL_CONFIG_CMD,
 638                                        0, sizeof(cmd), &cmd);
 639                 if (ret)
 640                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 641                 else
 642                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 643                                 "succeeded, "
 644                                 "critical temperature is %d\n",
 645                                 priv->hw_params.ct_kill_threshold);
 646         }
 647 }
 648
 649 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
 650 {
 651         struct iwl_calib_cfg_cmd calib_cfg_cmd;
 652         struct iwl_host_cmd cmd = {
 653                 .id = CALIBRATION_CFG_CMD,
 654                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
 655                 .data = { &calib_cfg_cmd, },
 656         };
 657
 658         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
 659         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
 660         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
 661
 662         return iwl_dvm_send_cmd(priv, &cmd);
 663 }
 664
 665
 666 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
 667 {
 668         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
 669           .valid = cpu_to_le32(valid_tx_ant),
 670         };
 671
 672         if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
 673                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
 674                 return iwl_dvm_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD, 0,
 675                                         sizeof(struct iwl_tx_ant_config_cmd),
 676                                         &tx_ant_cmd);
 677         } else {
 678                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
 679                 return -EOPNOTSUPP;
 680         }
 681 }
 682
 683 static void iwl_send_bt_config(struct iwl_priv *priv)
 684 {
 685         struct iwl_bt_cmd bt_cmd = {
 686                 .lead_time = BT_LEAD_TIME_DEF,
 687                 .max_kill = BT_MAX_KILL_DEF,
 688                 .kill_ack_mask = 0,
 689                 .kill_cts_mask = 0,
 690         };
 691
 692         if (!iwlwifi_mod_params.bt_coex_active)
 693                 bt_cmd.flags = BT_COEX_DISABLE;
 694         else
 695                 bt_cmd.flags = BT_COEX_ENABLE;
 696
 697         priv->bt_enable_flag = bt_cmd.flags;
 698         IWL_DEBUG_INFO(priv, "BT coex %s\n",
 699                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
 700
 701         if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 702                              0, sizeof(struct iwl_bt_cmd), &bt_cmd))
 703                 IWL_ERR(priv, "failed to send BT Coex Config\n");
 704 }
 705
 706 /**
 707  * iwl_alive_start - called after REPLY_ALIVE notification received
 708  *                   from protocol/runtime uCode (initialization uCode's
 709  *                   Alive gets handled by iwl_init_alive_start()).
 710  */
 711 int iwl_alive_start(struct iwl_priv *priv)
 712 {
 713         int ret = 0;
 714         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 715
 716         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 717
 718         /* After the ALIVE response, we can send host commands to the uCode */
 719         set_bit(STATUS_ALIVE, &priv->status);
 720
 721         if (iwl_is_rfkill(priv))
 722                 return -ERFKILL;
 723
 724         if (priv->event_log.ucode_trace) {
 725                 /* start collecting data now */
 726                 mod_timer(&priv->ucode_trace, jiffies);
 727         }
 728
 729         /* download priority table before any calibration request */
 730         if (priv->lib->bt_params &&
 731             priv->lib->bt_params->advanced_bt_coexist) {
 732                 /* Configure Bluetooth device coexistence support */
 733                 if (priv->lib->bt_params->bt_sco_disable)
 734                         priv->bt_enable_pspoll = false;
 735                 else
 736                         priv->bt_enable_pspoll = true;
 737
 738                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
 739                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
 740                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
 741                 iwlagn_send_advance_bt_config(priv);
 742                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
 743                 priv->cur_rssi_ctx = NULL;
 744
 745                 iwl_send_prio_tbl(priv);
 746
 747                 /* FIXME: w/a to force change uCode BT state machine */
 748                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
 749                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 750                 if (ret)
 751                         return ret;
 752                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
 753                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 754                 if (ret)
 755                         return ret;
 756         } else if (priv->lib->bt_params) {
 757                 /*
 758                  * default is 2-wire BT coexexistence support
 759                  */
 760                 iwl_send_bt_config(priv);
 761         }
 762
 763         /*
 764          * Perform runtime calibrations, including DC calibration.
 765          */
 766         iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
 767
 768         ieee80211_wake_queues(priv->hw);
 769
 770         /* Configure Tx antenna selection based on H/W config */
 771         iwlagn_send_tx_ant_config(priv, priv->nvm_data->valid_tx_ant);
 772
 773         if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
 774                 struct iwl_rxon_cmd *active_rxon =
 775                                 (struct iwl_rxon_cmd *)&ctx->active;
 776                 /* apply any changes in staging */
 777                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 778                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 779         } else {
 780                 struct iwl_rxon_context *tmp;
 781                 /* Initialize our rx_config data */
 782                 for_each_context(priv, tmp)
 783                         iwl_connection_init_rx_config(priv, tmp);
 784
 785                 iwlagn_set_rxon_chain(priv, ctx);
 786         }
 787
 788         if (!priv->wowlan) {
 789                 /* WoWLAN ucode will not reply in the same way, skip it */
 790                 iwl_reset_run_time_calib(priv);
 791         }
 792
 793         set_bit(STATUS_READY, &priv->status);
 794
 795         /* Configure the adapter for unassociated operation */
 796         ret = iwlagn_commit_rxon(priv, ctx);
 797         if (ret)
 798                 return ret;
 799
 800         /* At this point, the NIC is initialized and operational */
 801         iwl_rf_kill_ct_config(priv);
 802
 803         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
 804
 805         return iwl_power_update_mode(priv, true);
 806 }
 807
 808 /**
 809  * iwl_clear_driver_stations - clear knowledge of all stations from driver
 810  * @priv: iwl priv struct
 811  *
 812  * This is called during iwl_down() to make sure that in the case
 813  * we're coming there from a hardware restart mac80211 will be
 814  * able to reconfigure stations -- if we're getting there in the
 815  * normal down flow then the stations will already be cleared.
 816  */
 817 static void iwl_clear_driver_stations(struct iwl_priv *priv)
 818 {
 819         struct iwl_rxon_context *ctx;
 820
 821         spin_lock_bh(&priv->sta_lock);
 822         memset(priv->stations, 0, sizeof(priv->stations));
 823         priv->num_stations = 0;
 824
 825         priv->ucode_key_table = 0;
 826
 827         for_each_context(priv, ctx) {
 828                 /*
 829                  * Remove all key information that is not stored as part
 830                  * of station information since mac80211 may not have had
 831                  * a chance to remove all the keys. When device is
 832                  * reconfigured by mac80211 after an error all keys will
 833                  * be reconfigured.
 834                  */
 835                 memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
 836                 ctx->key_mapping_keys = 0;
 837         }
 838
 839         spin_unlock_bh(&priv->sta_lock);
 840 }
 841
 842 void iwl_down(struct iwl_priv *priv)
 843 {
 844         int exit_pending;
 845
 846         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
 847
 848         lockdep_assert_held(&priv->mutex);
 849
 850         iwl_scan_cancel_timeout(priv, 200);
 851
 852         exit_pending =
 853                 test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
 854
 855         iwl_clear_ucode_stations(priv, NULL);
 856         iwl_dealloc_bcast_stations(priv);
 857         iwl_clear_driver_stations(priv);
 858
 859         /* reset BT coex data */
 860         priv->bt_status = 0;
 861         priv->cur_rssi_ctx = NULL;
 862         priv->bt_is_sco = 0;
 863         if (priv->lib->bt_params)
 864                 priv->bt_traffic_load =
 865                          priv->lib->bt_params->bt_init_traffic_load;
 866         else
 867                 priv->bt_traffic_load = 0;
 868         priv->bt_full_concurrent = false;
 869         priv->bt_ci_compliance = 0;
 870
 871         /* Wipe out the EXIT_PENDING status bit if we are not actually
 872          * exiting the module */
 873         if (!exit_pending)
 874                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
 875
 876         if (priv->mac80211_registered)
 877                 ieee80211_stop_queues(priv->hw);
 878
 879         priv->ucode_loaded = false;
 880         iwl_trans_stop_device(priv->trans);
 881
 882         /* Set num_aux_in_flight must be done after the transport is stopped */
 883         atomic_set(&priv->num_aux_in_flight, 0);
 884
 885         /* Clear out all status bits but a few that are stable across reset */
 886         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
 887                                 STATUS_RF_KILL_HW |
 888                         test_bit(STATUS_FW_ERROR, &priv->status) <<
 889                                 STATUS_FW_ERROR |
 890                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
 891                                 STATUS_EXIT_PENDING;
 892
 893         dev_kfree_skb(priv->beacon_skb);
 894         priv->beacon_skb = NULL;
 895 }
 896
 897 /*****************************************************************************
 898  *
 899  * Workqueue callbacks
 900  *
 901  *****************************************************************************/
 902
 903 static void iwl_bg_run_time_calib_work(struct work_struct *work)
 904 {
 905         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 906                         run_time_calib_work);
 907
 908         mutex_lock(&priv->mutex);
 909
 910         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 911             test_bit(STATUS_SCANNING, &priv->status)) {
 912                 mutex_unlock(&priv->mutex);
 913                 return;
 914         }
 915
 916         if (priv->start_calib) {
 917                 iwl_chain_noise_calibration(priv);
 918                 iwl_sensitivity_calibration(priv);
 919         }
 920
 921         mutex_unlock(&priv->mutex);
 922 }
 923
 924 void iwlagn_prepare_restart(struct iwl_priv *priv)
 925 {
 926         bool bt_full_concurrent;
 927         u8 bt_ci_compliance;
 928         u8 bt_load;
 929         u8 bt_status;
 930         bool bt_is_sco;
 931         int i;
 932
 933         lockdep_assert_held(&priv->mutex);
 934
 935         priv->is_open = 0;
 936
 937         /*
 938          * __iwl_down() will clear the BT status variables,
 939          * which is correct, but when we restart we really
 940          * want to keep them so restore them afterwards.
 941          *
 942          * The restart process will later pick them up and
 943          * re-configure the hw when we reconfigure the BT
 944          * command.
 945          */
 946         bt_full_concurrent = priv->bt_full_concurrent;
 947         bt_ci_compliance = priv->bt_ci_compliance;
 948         bt_load = priv->bt_traffic_load;
 949         bt_status = priv->bt_status;
 950         bt_is_sco = priv->bt_is_sco;
 951
 952         iwl_down(priv);
 953
 954         priv->bt_full_concurrent = bt_full_concurrent;
 955         priv->bt_ci_compliance = bt_ci_compliance;
 956         priv->bt_traffic_load = bt_load;
 957         priv->bt_status = bt_status;
 958         priv->bt_is_sco = bt_is_sco;
 959
 960         /* reset aggregation queues */
 961         for (i = IWLAGN_FIRST_AMPDU_QUEUE; i < IWL_MAX_HW_QUEUES; i++)
 962                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
 963         /* and stop counts */
 964         for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
 965                 atomic_set(&priv->queue_stop_count[i], 0);
 966
 967         memset(priv->agg_q_alloc, 0, sizeof(priv->agg_q_alloc));
 968 }
 969
 970 static void iwl_bg_restart(struct work_struct *data)
 971 {
 972         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
 973
 974         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 975                 return;
 976
 977         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
 978                 mutex_lock(&priv->mutex);
 979                 iwlagn_prepare_restart(priv);
 980                 mutex_unlock(&priv->mutex);
 981                 iwl_cancel_deferred_work(priv);
 982                 if (priv->mac80211_registered)
 983                         ieee80211_restart_hw(priv->hw);
 984                 else
 985                         IWL_ERR(priv,
 986                                 "Cannot request restart before registrating with mac80211\n");
 987         } else {
 988                 WARN_ON(1);
 989         }
 990 }
 991
 992 /*****************************************************************************
 993  *
 994  * driver setup and teardown
 995  *
 996  *****************************************************************************/
 997
 998 static void iwl_setup_deferred_work(struct iwl_priv *priv)
 999 {
1000         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
1001
1002         INIT_WORK(&priv->restart, iwl_bg_restart);
1003         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
1004         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
1005         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
1006         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
1007         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
1008
1009         iwl_setup_scan_deferred_work(priv);
1010
1011         if (priv->lib->bt_params)
1012                 iwlagn_bt_setup_deferred_work(priv);
1013
1014         init_timer(&priv->statistics_periodic);
1015         priv->statistics_periodic.data = (unsigned long)priv;
1016         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
1017
1018         init_timer(&priv->ucode_trace);
1019         priv->ucode_trace.data = (unsigned long)priv;
1020         priv->ucode_trace.function = iwl_bg_ucode_trace;
1021 }
1022
1023 void iwl_cancel_deferred_work(struct iwl_priv *priv)
1024 {
1025         if (priv->lib->bt_params)
1026                 iwlagn_bt_cancel_deferred_work(priv);
1027
1028         cancel_work_sync(&priv->run_time_calib_work);
1029         cancel_work_sync(&priv->beacon_update);
1030
1031         iwl_cancel_scan_deferred_work(priv);
1032
1033         cancel_work_sync(&priv->bt_full_concurrency);
1034         cancel_work_sync(&priv->bt_runtime_config);
1035
1036         del_timer_sync(&priv->statistics_periodic);
1037         del_timer_sync(&priv->ucode_trace);
1038 }
1039
1040 static int iwl_init_drv(struct iwl_priv *priv)
1041 {
1042         spin_lock_init(&priv->sta_lock);
1043
1044         mutex_init(&priv->mutex);
1045
1046         INIT_LIST_HEAD(&priv->calib_results);
1047
1048         priv->band = IEEE80211_BAND_2GHZ;
1049
1050         priv->plcp_delta_threshold = priv->lib->plcp_delta_threshold;
1051
1052         priv->iw_mode = NL80211_IFTYPE_STATION;
1053         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1054         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1055         priv->agg_tids_count = 0;
1056
1057         priv->rx_statistics_jiffies = jiffies;
1058
1059         /* Choose which receivers/antennas to use */
1060         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1061
1062         iwl_init_scan_params(priv);
1063
1064         /* init bt coex */
1065         if (priv->lib->bt_params &&
1066             priv->lib->bt_params->advanced_bt_coexist) {
1067                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1068                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1069                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1070                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1071                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
1072                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1073         }
1074
1075         return 0;
1076 }
1077
1078 static void iwl_uninit_drv(struct iwl_priv *priv)
1079 {
1080         kfree(priv->scan_cmd);
1081         kfree(priv->beacon_cmd);
1082         kfree(rcu_dereference_raw(priv->noa_data));
1083         iwl_calib_free_results(priv);
1084 #ifdef CONFIG_IWLWIFI_DEBUGFS
1085         kfree(priv->wowlan_sram);
1086 #endif
1087 }
1088
1089 static void iwl_set_hw_params(struct iwl_priv *priv)
1090 {
1091         if (priv->cfg->ht_params)
1092                 priv->hw_params.use_rts_for_aggregation =
1093                         priv->cfg->ht_params->use_rts_for_aggregation;
1094
1095         /* Device-specific setup */
1096         priv->lib->set_hw_params(priv);
1097 }
1098
1099
1100
1101 /* show what optional capabilities we have */
1102 static void iwl_option_config(struct iwl_priv *priv)
1103 {
1104 #ifdef CONFIG_IWLWIFI_DEBUG
1105         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG enabled\n");
1106 #else
1107         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG disabled\n");
1108 #endif
1109
1110 #ifdef CONFIG_IWLWIFI_DEBUGFS
1111         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS enabled\n");
1112 #else
1113         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS disabled\n");
1114 #endif
1115
1116 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1117         IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING enabled\n");
1118 #else
1119         IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING disabled\n");
1120 #endif
1121 }
1122
1123 static int iwl_eeprom_init_hw_params(struct iwl_priv *priv)
1124 {
1125         struct iwl_nvm_data *data = priv->nvm_data;
1126
1127         if (data->sku_cap_11n_enable &&
1128             !priv->cfg->ht_params) {
1129                 IWL_ERR(priv, "Invalid 11n configuration\n");
1130                 return -EINVAL;
1131         }
1132
1133         if (!data->sku_cap_11n_enable && !data->sku_cap_band_24GHz_enable &&
1134             !data->sku_cap_band_52GHz_enable) {
1135                 IWL_ERR(priv, "Invalid device sku\n");
1136                 return -EINVAL;
1137         }
1138
1139         IWL_DEBUG_INFO(priv,
1140                        "Device SKU: 24GHz %s %s, 52GHz %s %s, 11.n %s %s\n",
1141                        data->sku_cap_band_24GHz_enable ? "" : "NOT", "enabled",
1142                        data->sku_cap_band_52GHz_enable ? "" : "NOT", "enabled",
1143                        data->sku_cap_11n_enable ? "" : "NOT", "enabled");
1144
1145         priv->hw_params.tx_chains_num =
1146                 num_of_ant(data->valid_tx_ant);
1147         if (priv->cfg->rx_with_siso_diversity)
1148                 priv->hw_params.rx_chains_num = 1;
1149         else
1150                 priv->hw_params.rx_chains_num =
1151                         num_of_ant(data->valid_rx_ant);
1152
1153         IWL_DEBUG_INFO(priv, "Valid Tx ant: 0x%X, Valid Rx ant: 0x%X\n",
1154                        data->valid_tx_ant,
1155                        data->valid_rx_ant);
1156
1157         return 0;
1158 }
1159
1160 static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
1161                                                  const struct iwl_cfg *cfg,
1162                                                  const struct iwl_fw *fw,
1163                                                  struct dentry *dbgfs_dir)
1164 {
1165         struct iwl_priv *priv;
1166         struct ieee80211_hw *hw;
1167         struct iwl_op_mode *op_mode;
1168         u16 num_mac;
1169         u32 ucode_flags;
1170         struct iwl_trans_config trans_cfg = {};
1171         static const u8 no_reclaim_cmds[] = {
1172                 REPLY_RX_PHY_CMD,
1173                 REPLY_RX_MPDU_CMD,
1174                 REPLY_COMPRESSED_BA,
1175                 STATISTICS_NOTIFICATION,
1176                 REPLY_TX,
1177         };
1178         int i;
1179
1180         /************************
1181          * 1. Allocating HW data
1182          ************************/
1183         hw = iwl_alloc_all();
1184         if (!hw) {
1185                 pr_err("%s: Cannot allocate network device\n", cfg->name);
1186                 goto out;
1187         }
1188
1189         op_mode = hw->priv;
1190         op_mode->ops = &iwl_dvm_ops;
1191         priv = IWL_OP_MODE_GET_DVM(op_mode);
1192         priv->trans = trans;
1193         priv->dev = trans->dev;
1194         priv->cfg = cfg;
1195         priv->fw = fw;
1196
1197         switch (priv->cfg->device_family) {
1198         case IWL_DEVICE_FAMILY_1000:
1199         case IWL_DEVICE_FAMILY_100:
1200                 priv->lib = &iwl_dvm_1000_cfg;
1201                 break;
1202         case IWL_DEVICE_FAMILY_2000:
1203                 priv->lib = &iwl_dvm_2000_cfg;
1204                 break;
1205         case IWL_DEVICE_FAMILY_105:
1206                 priv->lib = &iwl_dvm_105_cfg;
1207                 break;
1208         case IWL_DEVICE_FAMILY_2030:
1209         case IWL_DEVICE_FAMILY_135:
1210                 priv->lib = &iwl_dvm_2030_cfg;
1211                 break;
1212         case IWL_DEVICE_FAMILY_5000:
1213                 priv->lib = &iwl_dvm_5000_cfg;
1214                 break;
1215         case IWL_DEVICE_FAMILY_5150:
1216                 priv->lib = &iwl_dvm_5150_cfg;
1217                 break;
1218         case IWL_DEVICE_FAMILY_6000:
1219         case IWL_DEVICE_FAMILY_6000i:
1220                 priv->lib = &iwl_dvm_6000_cfg;
1221                 break;
1222         case IWL_DEVICE_FAMILY_6005:
1223                 priv->lib = &iwl_dvm_6005_cfg;
1224                 break;
1225         case IWL_DEVICE_FAMILY_6050:
1226         case IWL_DEVICE_FAMILY_6150:
1227                 priv->lib = &iwl_dvm_6050_cfg;
1228                 break;
1229         case IWL_DEVICE_FAMILY_6030:
1230                 priv->lib = &iwl_dvm_6030_cfg;
1231                 break;
1232         default:
1233                 break;
1234         }
1235
1236         if (WARN_ON(!priv->lib))
1237                 goto out_free_hw;
1238
1239         /*
1240          * Populate the state variables that the transport layer needs
1241          * to know about.
1242          */
1243         trans_cfg.op_mode = op_mode;
1244         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
1245         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
1246         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
1247         if (!iwlwifi_mod_params.wd_disable)
1248                 trans_cfg.queue_watchdog_timeout =
1249                         priv->cfg->base_params->wd_timeout;
1250         else
1251                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
1252         trans_cfg.command_names = iwl_dvm_cmd_strings;
1253         trans_cfg.cmd_fifo = IWLAGN_CMD_FIFO_NUM;
1254
1255         WARN_ON(sizeof(priv->transport_queue_stop) * BITS_PER_BYTE <
1256                 priv->cfg->base_params->num_of_queues);
1257
1258         ucode_flags = fw->ucode_capa.flags;
1259
1260         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1261                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1262                 trans_cfg.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1263         } else {
1264                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1265                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1266         }
1267
1268         /* Configure transport layer */
1269         iwl_trans_configure(priv->trans, &trans_cfg);
1270
1271         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
1272         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
1273
1274         /* At this point both hw and priv are allocated. */
1275
1276         SET_IEEE80211_DEV(priv->hw, priv->trans->dev);
1277
1278         iwl_option_config(priv);
1279
1280         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1281
1282         /* is antenna coupling more than 35dB ? */
1283         priv->bt_ant_couple_ok =
1284                 (iwlwifi_mod_params.ant_coupling >
1285                         IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
1286                         true : false;
1287
1288         /* bt channel inhibition enabled*/
1289         priv->bt_ch_announce = true;
1290         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1291                        (priv->bt_ch_announce) ? "On" : "Off");
1292
1293         /* these spin locks will be used in apm_ops.init and EEPROM access
1294          * we should init now
1295          */
1296         spin_lock_init(&priv->statistics.lock);
1297
1298         /***********************
1299          * 2. Read REV register
1300          ***********************/
1301         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1302                 priv->cfg->name, priv->trans->hw_rev);
1303
1304         if (iwl_trans_start_hw(priv->trans))
1305                 goto out_free_hw;
1306
1307         /* Read the EEPROM */
1308         if (iwl_read_eeprom(priv->trans, &priv->eeprom_blob,
1309                             &priv->eeprom_blob_size)) {
1310                 IWL_ERR(priv, "Unable to init EEPROM\n");
1311                 goto out_free_hw;
1312         }
1313
1314         /* Reset chip to save power until we load uCode during "up". */
1315         iwl_trans_stop_device(priv->trans);
1316
1317         priv->nvm_data = iwl_parse_eeprom_data(priv->trans->dev, priv->cfg,
1318                                                   priv->eeprom_blob,
1319                                                   priv->eeprom_blob_size);
1320         if (!priv->nvm_data)
1321                 goto out_free_eeprom_blob;
1322
1323         if (iwl_nvm_check_version(priv->nvm_data, priv->trans))
1324                 goto out_free_eeprom;
1325
1326         if (iwl_eeprom_init_hw_params(priv))
1327                 goto out_free_eeprom;
1328
1329         /* extract MAC Address */
1330         memcpy(priv->addresses[0].addr, priv->nvm_data->hw_addr, ETH_ALEN);
1331         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1332         priv->hw->wiphy->addresses = priv->addresses;
1333         priv->hw->wiphy->n_addresses = 1;
1334         num_mac = priv->nvm_data->n_hw_addrs;
1335         if (num_mac > 1) {
1336                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1337                        ETH_ALEN);
1338                 priv->addresses[1].addr[5]++;
1339                 priv->hw->wiphy->n_addresses++;
1340         }
1341
1342         /************************
1343          * 4. Setup HW constants
1344          ************************/
1345         iwl_set_hw_params(priv);
1346
1347         if (!(priv->nvm_data->sku_cap_ipan_enable)) {
1348                 IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN\n");
1349                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1350                 /*
1351                  * if not PAN, then don't support P2P -- might be a uCode
1352                  * packaging bug or due to the eeprom check above
1353                  */
1354                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1355                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1356
1357                 /* Configure transport layer again*/
1358                 iwl_trans_configure(priv->trans, &trans_cfg);
1359         }
1360
1361         /*******************
1362          * 5. Setup priv
1363          *******************/
1364         for (i = 0; i < IWL_MAX_HW_QUEUES; i++) {
1365                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1366                 if (i < IWLAGN_FIRST_AMPDU_QUEUE &&
1367                     i != IWL_DEFAULT_CMD_QUEUE_NUM &&
1368                     i != IWL_IPAN_CMD_QUEUE_NUM)
1369                         priv->queue_to_mac80211[i] = i;
1370                 atomic_set(&priv->queue_stop_count[i], 0);
1371         }
1372
1373         if (iwl_init_drv(priv))
1374                 goto out_free_eeprom;
1375
1376         /* At this point both hw and priv are initialized. */
1377
1378         /********************
1379          * 6. Setup services
1380          ********************/
1381         iwl_setup_deferred_work(priv);
1382         iwl_setup_rx_handlers(priv);
1383
1384         iwl_power_initialize(priv);
1385         iwl_tt_initialize(priv);
1386
1387         snprintf(priv->hw->wiphy->fw_version,
1388                  sizeof(priv->hw->wiphy->fw_version),
1389                  "%s", fw->fw_version);
1390
1391         priv->new_scan_threshold_behaviour =
1392                 !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1393
1394         priv->phy_calib_chain_noise_reset_cmd =
1395                 fw->ucode_capa.standard_phy_calibration_size;
1396         priv->phy_calib_chain_noise_gain_cmd =
1397                 fw->ucode_capa.standard_phy_calibration_size + 1;
1398
1399         /* initialize all valid contexts */
1400         iwl_init_context(priv, ucode_flags);
1401
1402         /**************************************************
1403          * This is still part of probe() in a sense...
1404          *
1405          * 7. Setup and register with mac80211 and debugfs
1406          **************************************************/
1407         if (iwlagn_mac_setup_register(priv, &fw->ucode_capa))
1408                 goto out_destroy_workqueue;
1409
1410         if (iwl_dbgfs_register(priv, dbgfs_dir))
1411                 goto out_mac80211_unregister;
1412
1413         return op_mode;
1414
1415 out_mac80211_unregister:
1416         iwlagn_mac_unregister(priv);
1417 out_destroy_workqueue:
1418         iwl_tt_exit(priv);
1419         iwl_cancel_deferred_work(priv);
1420         destroy_workqueue(priv->workqueue);
1421         priv->workqueue = NULL;
1422         iwl_uninit_drv(priv);
1423 out_free_eeprom_blob:
1424         kfree(priv->eeprom_blob);
1425 out_free_eeprom:
1426         iwl_free_nvm_data(priv->nvm_data);
1427 out_free_hw:
1428         ieee80211_free_hw(priv->hw);
1429 out:
1430         op_mode = NULL;
1431         return op_mode;
1432 }
1433
1434 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1435 {
1436         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1437
1438         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1439
1440         iwlagn_mac_unregister(priv);
1441
1442         iwl_tt_exit(priv);
1443
1444         kfree(priv->eeprom_blob);
1445         iwl_free_nvm_data(priv->nvm_data);
1446
1447         /*netif_stop_queue(dev); */
1448         flush_workqueue(priv->workqueue);
1449
1450         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1451          * priv->workqueue... so we can't take down the workqueue
1452          * until now... */
1453         destroy_workqueue(priv->workqueue);
1454         priv->workqueue = NULL;
1455
1456         iwl_uninit_drv(priv);
1457
1458         dev_kfree_skb(priv->beacon_skb);
1459
1460         iwl_trans_op_mode_leave(priv->trans);
1461         ieee80211_free_hw(priv->hw);
1462 }
1463
1464 static const char * const desc_lookup_text[] = {
1465         "OK",
1466         "FAIL",
1467         "BAD_PARAM",
1468         "BAD_CHECKSUM",
1469         "NMI_INTERRUPT_WDG",
1470         "SYSASSERT",
1471         "FATAL_ERROR",
1472         "BAD_COMMAND",
1473         "HW_ERROR_TUNE_LOCK",
1474         "HW_ERROR_TEMPERATURE",
1475         "ILLEGAL_CHAN_FREQ",
1476         "VCC_NOT_STABLE",
1477         "FH_ERROR",
1478         "NMI_INTERRUPT_HOST",
1479         "NMI_INTERRUPT_ACTION_PT",
1480         "NMI_INTERRUPT_UNKNOWN",
1481         "UCODE_VERSION_MISMATCH",
1482         "HW_ERROR_ABS_LOCK",
1483         "HW_ERROR_CAL_LOCK_FAIL",
1484         "NMI_INTERRUPT_INST_ACTION_PT",
1485         "NMI_INTERRUPT_DATA_ACTION_PT",
1486         "NMI_TRM_HW_ER",
1487         "NMI_INTERRUPT_TRM",
1488         "NMI_INTERRUPT_BREAK_POINT",
1489         "DEBUG_0",
1490         "DEBUG_1",
1491         "DEBUG_2",
1492         "DEBUG_3",
1493 };
1494
1495 static struct { char *name; u8 num; } advanced_lookup[] = {
1496         { "NMI_INTERRUPT_WDG", 0x34 },
1497         { "SYSASSERT", 0x35 },
1498         { "UCODE_VERSION_MISMATCH", 0x37 },
1499         { "BAD_COMMAND", 0x38 },
1500         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1501         { "FATAL_ERROR", 0x3D },
1502         { "NMI_TRM_HW_ERR", 0x46 },
1503         { "NMI_INTERRUPT_TRM", 0x4C },
1504         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1505         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1506         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1507         { "NMI_INTERRUPT_HOST", 0x66 },
1508         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1509         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1510         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1511         { "ADVANCED_SYSASSERT", 0 },
1512 };
1513
1514 static const char *desc_lookup(u32 num)
1515 {
1516         int i;
1517         int max = ARRAY_SIZE(desc_lookup_text);
1518
1519         if (num < max)
1520                 return desc_lookup_text[num];
1521
1522         max = ARRAY_SIZE(advanced_lookup) - 1;
1523         for (i = 0; i < max; i++) {
1524                 if (advanced_lookup[i].num == num)
1525                         break;
1526         }
1527         return advanced_lookup[i].name;
1528 }
1529
1530 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1531 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1532
1533 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
1534 {
1535         struct iwl_trans *trans = priv->trans;
1536         u32 base;
1537         struct iwl_error_event_table table;
1538
1539         base = priv->device_pointers.error_event_table;
1540         if (priv->cur_ucode == IWL_UCODE_INIT) {
1541                 if (!base)
1542                         base = priv->fw->init_errlog_ptr;
1543         } else {
1544                 if (!base)
1545                         base = priv->fw->inst_errlog_ptr;
1546         }
1547
1548         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1549                 IWL_ERR(priv,
1550                         "Not valid error log pointer 0x%08X for %s uCode\n",
1551                         base,
1552                         (priv->cur_ucode == IWL_UCODE_INIT)
1553                                         ? "Init" : "RT");
1554                 return;
1555         }
1556
1557         /*TODO: Update dbgfs with ISR error stats obtained below */
1558         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
1559
1560         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1561                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
1562                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
1563                         priv->status, table.valid);
1564         }
1565
1566         trace_iwlwifi_dev_ucode_error(trans->dev, table.error_id, table.tsf_low,
1567                                       table.data1, table.data2, table.line,
1568                                       table.blink1, table.blink2, table.ilink1,
1569                                       table.ilink2, table.bcon_time, table.gp1,
1570                                       table.gp2, table.gp3, table.ucode_ver,
1571                                       table.hw_ver, table.brd_ver);
1572         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1573                 desc_lookup(table.error_id));
1574         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1575         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1576         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1577         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1578         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1579         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1580         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1581         IWL_ERR(priv, "0x%08X | line\n", table.line);
1582         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1583         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1584         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1585         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1586         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1587         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1588         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1589         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1590         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1591         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1592         IWL_ERR(priv, "0x%08X | isr0\n", table.isr0);
1593         IWL_ERR(priv, "0x%08X | isr1\n", table.isr1);
1594         IWL_ERR(priv, "0x%08X | isr2\n", table.isr2);
1595         IWL_ERR(priv, "0x%08X | isr3\n", table.isr3);
1596         IWL_ERR(priv, "0x%08X | isr4\n", table.isr4);
1597         IWL_ERR(priv, "0x%08X | isr_pref\n", table.isr_pref);
1598         IWL_ERR(priv, "0x%08X | wait_event\n", table.wait_event);
1599         IWL_ERR(priv, "0x%08X | l2p_control\n", table.l2p_control);
1600         IWL_ERR(priv, "0x%08X | l2p_duration\n", table.l2p_duration);
1601         IWL_ERR(priv, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
1602         IWL_ERR(priv, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
1603         IWL_ERR(priv, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
1604         IWL_ERR(priv, "0x%08X | timestamp\n", table.u_timestamp);
1605         IWL_ERR(priv, "0x%08X | flow_handler\n", table.flow_handler);
1606 }
1607
1608 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1609
1610 /**
1611  * iwl_print_event_log - Dump error event log to syslog
1612  *
1613  */
1614 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1615                                u32 num_events, u32 mode,
1616                                int pos, char **buf, size_t bufsz)
1617 {
1618         u32 i;
1619         u32 base;       /* SRAM byte address of event log header */
1620         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1621         u32 ptr;        /* SRAM byte address of log data */
1622         u32 ev, time, data; /* event log data */
1623         unsigned long reg_flags;
1624
1625         struct iwl_trans *trans = priv->trans;
1626
1627         if (num_events == 0)
1628                 return pos;
1629
1630         base = priv->device_pointers.log_event_table;
1631         if (priv->cur_ucode == IWL_UCODE_INIT) {
1632                 if (!base)
1633                         base = priv->fw->init_evtlog_ptr;
1634         } else {
1635                 if (!base)
1636                         base = priv->fw->inst_evtlog_ptr;
1637         }
1638
1639         if (mode == 0)
1640                 event_size = 2 * sizeof(u32);
1641         else
1642                 event_size = 3 * sizeof(u32);
1643
1644         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1645
1646         /* Make sure device is powered up for SRAM reads */
1647         if (!iwl_trans_grab_nic_access(trans, false, &reg_flags))
1648                 return pos;
1649
1650         /* Set starting address; reads will auto-increment */
1651         iwl_write32(trans, HBUS_TARG_MEM_RADDR, ptr);
1652
1653         /* "time" is actually "data" for mode 0 (no timestamp).
1654         * place event id # at far right for easier visual parsing. */
1655         for (i = 0; i < num_events; i++) {
1656                 ev = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1657                 time = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1658                 if (mode == 0) {
1659                         /* data, ev */
1660                         if (bufsz) {
1661                                 pos += scnprintf(*buf + pos, bufsz - pos,
1662                                                 "EVT_LOG:0x%08x:%04u\n",
1663                                                 time, ev);
1664                         } else {
1665                                 trace_iwlwifi_dev_ucode_event(trans->dev, 0,
1666                                         time, ev);
1667                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1668                                         time, ev);
1669                         }
1670                 } else {
1671                         data = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1672                         if (bufsz) {
1673                                 pos += scnprintf(*buf + pos, bufsz - pos,
1674                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1675                                                  time, data, ev);
1676                         } else {
1677                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1678                                         time, data, ev);
1679                                 trace_iwlwifi_dev_ucode_event(trans->dev, time,
1680                                         data, ev);
1681                         }
1682                 }
1683         }
1684
1685         /* Allow device to power down */
1686         iwl_trans_release_nic_access(trans, &reg_flags);
1687         return pos;
1688 }
1689
1690 /**
1691  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1692  */
1693 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1694                                     u32 num_wraps, u32 next_entry,
1695                                     u32 size, u32 mode,
1696                                     int pos, char **buf, size_t bufsz)
1697 {
1698         /*
1699          * display the newest DEFAULT_LOG_ENTRIES entries
1700          * i.e the entries just before the next ont that uCode would fill.
1701          */
1702         if (num_wraps) {
1703                 if (next_entry < size) {
1704                         pos = iwl_print_event_log(priv,
1705                                                 capacity - (size - next_entry),
1706                                                 size - next_entry, mode,
1707                                                 pos, buf, bufsz);
1708                         pos = iwl_print_event_log(priv, 0,
1709                                                   next_entry, mode,
1710                                                   pos, buf, bufsz);
1711                 } else
1712                         pos = iwl_print_event_log(priv, next_entry - size,
1713                                                   size, mode, pos, buf, bufsz);
1714         } else {
1715                 if (next_entry < size) {
1716                         pos = iwl_print_event_log(priv, 0, next_entry,
1717                                                   mode, pos, buf, bufsz);
1718                 } else {
1719                         pos = iwl_print_event_log(priv, next_entry - size,
1720                                                   size, mode, pos, buf, bufsz);
1721                 }
1722         }
1723         return pos;
1724 }
1725
1726 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1727
1728 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1729                             char **buf)
1730 {
1731         u32 base;       /* SRAM byte address of event log header */
1732         u32 capacity;   /* event log capacity in # entries */
1733         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1734         u32 num_wraps;  /* # times uCode wrapped to top of log */
1735         u32 next_entry; /* index of next entry to be written by uCode */
1736         u32 size;       /* # entries that we'll print */
1737         u32 logsize;
1738         int pos = 0;
1739         size_t bufsz = 0;
1740         struct iwl_trans *trans = priv->trans;
1741
1742         base = priv->device_pointers.log_event_table;
1743         if (priv->cur_ucode == IWL_UCODE_INIT) {
1744                 logsize = priv->fw->init_evtlog_size;
1745                 if (!base)
1746                         base = priv->fw->init_evtlog_ptr;
1747         } else {
1748                 logsize = priv->fw->inst_evtlog_size;
1749                 if (!base)
1750                         base = priv->fw->inst_evtlog_ptr;
1751         }
1752
1753         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1754                 IWL_ERR(priv,
1755                         "Invalid event log pointer 0x%08X for %s uCode\n",
1756                         base,
1757                         (priv->cur_ucode == IWL_UCODE_INIT)
1758                                         ? "Init" : "RT");
1759                 return -EINVAL;
1760         }
1761
1762         /* event log header */
1763         capacity = iwl_trans_read_mem32(trans, base);
1764         mode = iwl_trans_read_mem32(trans, base + (1 * sizeof(u32)));
1765         num_wraps = iwl_trans_read_mem32(trans, base + (2 * sizeof(u32)));
1766         next_entry = iwl_trans_read_mem32(trans, base + (3 * sizeof(u32)));
1767
1768         if (capacity > logsize) {
1769                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d "
1770                         "entries\n", capacity, logsize);
1771                 capacity = logsize;
1772         }
1773
1774         if (next_entry > logsize) {
1775                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1776                         next_entry, logsize);
1777                 next_entry = logsize;
1778         }
1779
1780         size = num_wraps ? capacity : next_entry;
1781
1782         /* bail out if nothing in log */
1783         if (size == 0) {
1784                 IWL_ERR(trans, "Start IWL Event Log Dump: nothing in log\n");
1785                 return pos;
1786         }
1787
1788         if (!(iwl_have_debug_level(IWL_DL_FW_ERRORS)) && !full_log)
1789                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1790                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1791         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1792                 size);
1793
1794 #ifdef CONFIG_IWLWIFI_DEBUG
1795         if (buf) {
1796                 if (full_log)
1797                         bufsz = capacity * 48;
1798                 else
1799                         bufsz = size * 48;
1800                 *buf = kmalloc(bufsz, GFP_KERNEL);
1801                 if (!*buf)
1802                         return -ENOMEM;
1803         }
1804         if (iwl_have_debug_level(IWL_DL_FW_ERRORS) || full_log) {
1805                 /*
1806                  * if uCode has wrapped back to top of log,
1807                  * start at the oldest entry,
1808                  * i.e the next one that uCode would fill.
1809                  */
1810                 if (num_wraps)
1811                         pos = iwl_print_event_log(priv, next_entry,
1812                                                 capacity - next_entry, mode,
1813                                                 pos, buf, bufsz);
1814                 /* (then/else) start at top of log */
1815                 pos = iwl_print_event_log(priv, 0,
1816                                           next_entry, mode, pos, buf, bufsz);
1817         } else
1818                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1819                                                 next_entry, size, mode,
1820                                                 pos, buf, bufsz);
1821 #else
1822         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1823                                         next_entry, size, mode,
1824                                         pos, buf, bufsz);
1825 #endif
1826         return pos;
1827 }
1828
1829 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
1830 {
1831         unsigned int reload_msec;
1832         unsigned long reload_jiffies;
1833
1834         if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
1835                 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
1836
1837         /* uCode is no longer loaded. */
1838         priv->ucode_loaded = false;
1839
1840         /* Set the FW error flag -- cleared on iwl_down */
1841         set_bit(STATUS_FW_ERROR, &priv->status);
1842
1843         iwl_abort_notification_waits(&priv->notif_wait);
1844
1845         /* Keep the restart process from trying to send host
1846          * commands by clearing the ready bit */
1847         clear_bit(STATUS_READY, &priv->status);
1848
1849         if (!ondemand) {
1850                 /*
1851                  * If firmware keep reloading, then it indicate something
1852                  * serious wrong and firmware having problem to recover
1853                  * from it. Instead of keep trying which will fill the syslog
1854                  * and hang the system, let's just stop it
1855                  */
1856                 reload_jiffies = jiffies;
1857                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
1858                                         (long) priv->reload_jiffies);
1859                 priv->reload_jiffies = reload_jiffies;
1860                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
1861                         priv->reload_count++;
1862                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
1863                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
1864                                 return;
1865                         }
1866                 } else
1867                         priv->reload_count = 0;
1868         }
1869
1870         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1871                 if (iwlwifi_mod_params.restart_fw) {
1872                         IWL_DEBUG_FW_ERRORS(priv,
1873                                   "Restarting adapter due to uCode error.\n");
1874                         queue_work(priv->workqueue, &priv->restart);
1875                 } else
1876                         IWL_DEBUG_FW_ERRORS(priv,
1877                                   "Detected FW error, but not restarting\n");
1878         }
1879 }
1880
1881 static void iwl_nic_error(struct iwl_op_mode *op_mode)
1882 {
1883         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1884
1885         IWL_ERR(priv, "Loaded firmware version: %s\n",
1886                 priv->fw->fw_version);
1887
1888         iwl_dump_nic_error_log(priv);
1889         iwl_dump_nic_event_log(priv, false, NULL);
1890
1891         iwlagn_fw_error(priv, false);
1892 }
1893
1894 static void iwl_cmd_queue_full(struct iwl_op_mode *op_mode)
1895 {
1896         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1897
1898         if (!iwl_check_for_ct_kill(priv)) {
1899                 IWL_ERR(priv, "Restarting adapter queue is full\n");
1900                 iwlagn_fw_error(priv, false);
1901         }
1902 }
1903
1904 #define EEPROM_RF_CONFIG_TYPE_MAX      0x3
1905
1906 static void iwl_nic_config(struct iwl_op_mode *op_mode)
1907 {
1908         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1909
1910         /* SKU Control */
1911         iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
1912                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
1913                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP,
1914                                 (CSR_HW_REV_STEP(priv->trans->hw_rev) <<
1915                                         CSR_HW_IF_CONFIG_REG_POS_MAC_STEP) |
1916                                 (CSR_HW_REV_DASH(priv->trans->hw_rev) <<
1917                                         CSR_HW_IF_CONFIG_REG_POS_MAC_DASH));
1918
1919         /* write radio config values to register */
1920         if (priv->nvm_data->radio_cfg_type <= EEPROM_RF_CONFIG_TYPE_MAX) {
1921                 u32 reg_val =
1922                         priv->nvm_data->radio_cfg_type <<
1923                                 CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE |
1924                         priv->nvm_data->radio_cfg_step <<
1925                                 CSR_HW_IF_CONFIG_REG_POS_PHY_STEP |
1926                         priv->nvm_data->radio_cfg_dash <<
1927                                 CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
1928
1929                 iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
1930                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
1931                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
1932                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH,
1933                                         reg_val);
1934
1935                 IWL_INFO(priv, "Radio type=0x%x-0x%x-0x%x\n",
1936                          priv->nvm_data->radio_cfg_type,
1937                          priv->nvm_data->radio_cfg_step,
1938                          priv->nvm_data->radio_cfg_dash);
1939         } else {
1940                 WARN_ON(1);
1941         }
1942
1943         /* set CSR_HW_CONFIG_REG for uCode use */
1944         iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
1945                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
1946                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
1947
1948         /* W/A : NIC is stuck in a reset state after Early PCIe power off
1949          * (PCIe power is lost before PERST# is asserted),
1950          * causing ME FW to lose ownership and not being able to obtain it back.
1951          */
1952         iwl_set_bits_mask_prph(priv->trans, APMG_PS_CTRL_REG,
1953                                APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
1954                                ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
1955
1956         if (priv->lib->nic_config)
1957                 priv->lib->nic_config(priv);
1958 }
1959
1960 static void iwl_wimax_active(struct iwl_op_mode *op_mode)
1961 {
1962         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1963
1964         clear_bit(STATUS_READY, &priv->status);
1965         IWL_ERR(priv, "RF is used by WiMAX\n");
1966 }
1967
1968 static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
1969 {
1970         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1971         int mq = priv->queue_to_mac80211[queue];
1972
1973         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
1974                 return;
1975
1976         if (atomic_inc_return(&priv->queue_stop_count[mq]) > 1) {
1977                 IWL_DEBUG_TX_QUEUES(priv,
1978                         "queue %d (mac80211 %d) already stopped\n",
1979                         queue, mq);
1980                 return;
1981         }
1982
1983         set_bit(mq, &priv->transport_queue_stop);
1984         ieee80211_stop_queue(priv->hw, mq);
1985 }
1986
1987 static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
1988 {
1989         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1990         int mq = priv->queue_to_mac80211[queue];
1991
1992         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
1993                 return;
1994
1995         if (atomic_dec_return(&priv->queue_stop_count[mq]) > 0) {
1996                 IWL_DEBUG_TX_QUEUES(priv,
1997                         "queue %d (mac80211 %d) already awake\n",
1998                         queue, mq);
1999                 return;
2000         }
2001
2002         clear_bit(mq, &priv->transport_queue_stop);
2003
2004         if (!priv->passive_no_rx)
2005                 ieee80211_wake_queue(priv->hw, mq);
2006 }
2007
2008 void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
2009 {
2010         int mq;
2011
2012         if (!priv->passive_no_rx)
2013                 return;
2014
2015         for (mq = 0; mq < IWLAGN_FIRST_AMPDU_QUEUE; mq++) {
2016                 if (!test_bit(mq, &priv->transport_queue_stop)) {
2017                         IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d\n", mq);
2018                         ieee80211_wake_queue(priv->hw, mq);
2019                 } else {
2020                         IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d\n", mq);
2021                 }
2022         }
2023
2024         priv->passive_no_rx = false;
2025 }
2026
2027 static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
2028 {
2029         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2030         struct ieee80211_tx_info *info;
2031
2032         info = IEEE80211_SKB_CB(skb);
2033         iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
2034         ieee80211_free_txskb(priv->hw, skb);
2035 }
2036
2037 static bool iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
2038 {
2039         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2040
2041         if (state)
2042                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2043         else
2044                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2045
2046         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
2047
2048         return false;
2049 }
2050
2051 static void iwl_napi_add(struct iwl_op_mode *op_mode,
2052                          struct napi_struct *napi,
2053                          struct net_device *napi_dev,
2054                          int (*poll)(struct napi_struct *, int),
2055                          int weight)
2056 {
2057         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2058
2059         ieee80211_napi_add(priv->hw, napi, napi_dev, poll, weight);
2060 }
2061
2062 static const struct iwl_op_mode_ops iwl_dvm_ops = {
2063         .start = iwl_op_mode_dvm_start,
2064         .stop = iwl_op_mode_dvm_stop,
2065         .rx = iwl_rx_dispatch,
2066         .queue_full = iwl_stop_sw_queue,
2067         .queue_not_full = iwl_wake_sw_queue,
2068         .hw_rf_kill = iwl_set_hw_rfkill_state,
2069         .free_skb = iwl_free_skb,
2070         .nic_error = iwl_nic_error,
2071         .cmd_queue_full = iwl_cmd_queue_full,
2072         .nic_config = iwl_nic_config,
2073         .wimax_active = iwl_wimax_active,
2074         .napi_add = iwl_napi_add,
2075 };
2076
2077 /*****************************************************************************
2078  *
2079  * driver and module entry point
2080  *
2081  *****************************************************************************/
2082 static int __init iwl_init(void)
2083 {
2084
2085         int ret;
2086
2087         ret = iwlagn_rate_control_register();
2088         if (ret) {
2089                 pr_err("Unable to register rate control algorithm: %d\n", ret);
2090                 return ret;
2091         }
2092
2093         ret = iwl_opmode_register("iwldvm", &iwl_dvm_ops);
2094         if (ret) {
2095                 pr_err("Unable to register op_mode: %d\n", ret);
2096                 iwlagn_rate_control_unregister();
2097         }
2098
2099         return ret;
2100 }
2101 module_init(iwl_init);
2102
2103 static void __exit iwl_exit(void)
2104 {
2105         iwl_opmode_deregister("iwldvm");
2106         iwlagn_rate_control_unregister();
2107 }
2108 module_exit(iwl_exit);