drivers/net/wireless/iwlwifi/mvm/ops.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
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  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/module.h>
  64 #include <net/mac80211.h>
  65
  66 #include "iwl-notif-wait.h"
  67 #include "iwl-trans.h"
  68 #include "iwl-op-mode.h"
  69 #include "iwl-fw.h"
  70 #include "iwl-debug.h"
  71 #include "iwl-drv.h"
  72 #include "iwl-modparams.h"
  73 #include "mvm.h"
  74 #include "iwl-phy-db.h"
  75 #include "iwl-eeprom-parse.h"
  76 #include "iwl-csr.h"
  77 #include "iwl-io.h"
  78 #include "iwl-prph.h"
  79 #include "rs.h"
  80 #include "fw-api-scan.h"
  81 #include "time-event.h"
  82
  83 /*
  84  * module name, copyright, version, etc.
  85  */
  86 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  87
  88 #define DRV_VERSION     IWLWIFI_VERSION
  89
  90 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  91 MODULE_VERSION(DRV_VERSION);
  92 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  93 MODULE_LICENSE("GPL");
  94
  95 static const struct iwl_op_mode_ops iwl_mvm_ops;
  96
  97 struct iwl_mvm_mod_params iwlmvm_mod_params = {
  98         .power_scheme = IWL_POWER_SCHEME_BPS,
  99         /* rest of fields are 0 by default */
 100 };
 101
 102 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 103 MODULE_PARM_DESC(init_dbg,
 104                  "set to true to debug an ASSERT in INIT fw (default: false");
 105 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 106 MODULE_PARM_DESC(power_scheme,
 107                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 108
 109 /*
 110  * module init and exit functions
 111  */
 112 static int __init iwl_mvm_init(void)
 113 {
 114         int ret;
 115
 116         ret = iwl_mvm_rate_control_register();
 117         if (ret) {
 118                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 119                 return ret;
 120         }
 121
 122         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 123
 124         if (ret) {
 125                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 126                 iwl_mvm_rate_control_unregister();
 127         }
 128
 129         return ret;
 130 }
 131 module_init(iwl_mvm_init);
 132
 133 static void __exit iwl_mvm_exit(void)
 134 {
 135         iwl_opmode_deregister("iwlmvm");
 136         iwl_mvm_rate_control_unregister();
 137 }
 138 module_exit(iwl_mvm_exit);
 139
 140 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 141 {
 142         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 143         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 144         u32 reg_val = 0;
 145
 146         radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 147                           FW_PHY_CFG_RADIO_TYPE_POS;
 148         radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
 149                           FW_PHY_CFG_RADIO_STEP_POS;
 150         radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
 151                           FW_PHY_CFG_RADIO_DASH_POS;
 152
 153         /* SKU control */
 154         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 155                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 156         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 157                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 158
 159         /* radio configuration */
 160         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 161         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 162         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 163
 164         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 165                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 166
 167         /* silicon bits */
 168         reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 169
 170         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 171                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 172                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 173                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 174                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 175                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 176                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 177                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 178                                 reg_val);
 179
 180         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 181                        radio_cfg_step, radio_cfg_dash);
 182
 183         /*
 184          * W/A : NIC is stuck in a reset state after Early PCIe power off
 185          * (PCIe power is lost before PERST# is asserted), causing ME FW
 186          * to lose ownership and not being able to obtain it back.
 187          */
 188         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 189                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 190                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 191                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 192 }
 193
 194 struct iwl_rx_handlers {
 195         u8 cmd_id;
 196         bool async;
 197         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 198                   struct iwl_device_cmd *cmd);
 199 };
 200
 201 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 202         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 203
 204 /*
 205  * Handlers for fw notifications
 206  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 207  * This list should be in order of frequency for performance purposes.
 208  *
 209  * The handler can be SYNC - this means that it will be called in the Rx path
 210  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 211  * only in this case!), it should be set as ASYNC. In that case, it will be
 212  * called from a worker with mvm->mutex held.
 213  */
 214 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 215         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 216         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 217         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 218         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 219
 220         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 221         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false),
 222         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 223         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 224                    iwl_mvm_rx_ant_coupling_notif, true),
 225
 226         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 227
 228         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 229
 230         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 231         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 232         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 233                    iwl_mvm_rx_scan_offload_complete_notif, true),
 234         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_sched_scan_results,
 235                    false),
 236
 237         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 238         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 239
 240         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 241                    false),
 242
 243         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 244         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 245                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 246 };
 247 #undef RX_HANDLER
 248 #define CMD(x) [x] = #x
 249
 250 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 251         CMD(MVM_ALIVE),
 252         CMD(REPLY_ERROR),
 253         CMD(INIT_COMPLETE_NOTIF),
 254         CMD(PHY_CONTEXT_CMD),
 255         CMD(MGMT_MCAST_KEY),
 256         CMD(TX_CMD),
 257         CMD(TXPATH_FLUSH),
 258         CMD(MAC_CONTEXT_CMD),
 259         CMD(TIME_EVENT_CMD),
 260         CMD(TIME_EVENT_NOTIFICATION),
 261         CMD(BINDING_CONTEXT_CMD),
 262         CMD(TIME_QUOTA_CMD),
 263         CMD(NON_QOS_TX_COUNTER_CMD),
 264         CMD(RADIO_VERSION_NOTIFICATION),
 265         CMD(SCAN_REQUEST_CMD),
 266         CMD(SCAN_ABORT_CMD),
 267         CMD(SCAN_START_NOTIFICATION),
 268         CMD(SCAN_RESULTS_NOTIFICATION),
 269         CMD(SCAN_COMPLETE_NOTIFICATION),
 270         CMD(NVM_ACCESS_CMD),
 271         CMD(PHY_CONFIGURATION_CMD),
 272         CMD(CALIB_RES_NOTIF_PHY_DB),
 273         CMD(SET_CALIB_DEFAULT_CMD),
 274         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 275         CMD(ADD_STA_KEY),
 276         CMD(ADD_STA),
 277         CMD(REMOVE_STA),
 278         CMD(LQ_CMD),
 279         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 280         CMD(MATCH_FOUND_NOTIFICATION),
 281         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 282         CMD(SCAN_OFFLOAD_ABORT_CMD),
 283         CMD(SCAN_OFFLOAD_COMPLETE),
 284         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 285         CMD(POWER_TABLE_CMD),
 286         CMD(WEP_KEY),
 287         CMD(REPLY_RX_PHY_CMD),
 288         CMD(REPLY_RX_MPDU_CMD),
 289         CMD(BEACON_NOTIFICATION),
 290         CMD(BEACON_TEMPLATE_CMD),
 291         CMD(STATISTICS_NOTIFICATION),
 292         CMD(EOSP_NOTIFICATION),
 293         CMD(REDUCE_TX_POWER_CMD),
 294         CMD(TX_ANT_CONFIGURATION_CMD),
 295         CMD(D3_CONFIG_CMD),
 296         CMD(D0I3_END_CMD),
 297         CMD(PROT_OFFLOAD_CONFIG_CMD),
 298         CMD(OFFLOADS_QUERY_CMD),
 299         CMD(REMOTE_WAKE_CONFIG_CMD),
 300         CMD(WOWLAN_PATTERNS),
 301         CMD(WOWLAN_CONFIGURATION),
 302         CMD(WOWLAN_TSC_RSC_PARAM),
 303         CMD(WOWLAN_TKIP_PARAM),
 304         CMD(WOWLAN_KEK_KCK_MATERIAL),
 305         CMD(WOWLAN_GET_STATUSES),
 306         CMD(WOWLAN_TX_POWER_PER_DB),
 307         CMD(NET_DETECT_CONFIG_CMD),
 308         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 309         CMD(NET_DETECT_PROFILES_CMD),
 310         CMD(NET_DETECT_HOTSPOTS_CMD),
 311         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 312         CMD(CARD_STATE_NOTIFICATION),
 313         CMD(MISSED_BEACONS_NOTIFICATION),
 314         CMD(BT_COEX_PRIO_TABLE),
 315         CMD(BT_COEX_PROT_ENV),
 316         CMD(BT_PROFILE_NOTIFICATION),
 317         CMD(BT_CONFIG),
 318         CMD(MCAST_FILTER_CMD),
 319         CMD(BCAST_FILTER_CMD),
 320         CMD(REPLY_SF_CFG_CMD),
 321         CMD(REPLY_BEACON_FILTERING_CMD),
 322         CMD(REPLY_THERMAL_MNG_BACKOFF),
 323         CMD(MAC_PM_POWER_TABLE),
 324         CMD(BT_COEX_CI),
 325         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 326         CMD(ANTENNA_COUPLING_NOTIFICATION),
 327 };
 328 #undef CMD
 329
 330 /* this forward declaration can avoid to export the function */
 331 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 332 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 333
 334 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 335 {
 336         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 337
 338         if (!pwr_tx_backoff)
 339                 return 0;
 340
 341         while (pwr_tx_backoff->pwr) {
 342                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 343                         return pwr_tx_backoff->backoff;
 344
 345                 pwr_tx_backoff++;
 346         }
 347
 348         return 0;
 349 }
 350
 351 static struct iwl_op_mode *
 352 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 353                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 354 {
 355         struct ieee80211_hw *hw;
 356         struct iwl_op_mode *op_mode;
 357         struct iwl_mvm *mvm;
 358         struct iwl_trans_config trans_cfg = {};
 359         static const u8 no_reclaim_cmds[] = {
 360                 TX_CMD,
 361         };
 362         int err, scan_size;
 363         u32 min_backoff;
 364
 365         /*
 366          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 367          * index all over the driver - check that its value corresponds to the
 368          * array size.
 369          */
 370         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 371
 372         /********************************
 373          * 1. Allocating and configuring HW data
 374          ********************************/
 375         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 376                                 sizeof(struct iwl_mvm),
 377                                 &iwl_mvm_hw_ops);
 378         if (!hw)
 379                 return NULL;
 380
 381         op_mode = hw->priv;
 382         op_mode->ops = &iwl_mvm_ops;
 383
 384         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 385         mvm->dev = trans->dev;
 386         mvm->trans = trans;
 387         mvm->cfg = cfg;
 388         mvm->fw = fw;
 389         mvm->hw = hw;
 390
 391         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 392
 393         mvm->aux_queue = 15;
 394         mvm->first_agg_queue = 16;
 395         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 396         if (mvm->cfg->base_params->num_of_queues == 16) {
 397                 mvm->aux_queue = 11;
 398                 mvm->first_agg_queue = 12;
 399         }
 400         mvm->sf_state = SF_UNINIT;
 401
 402         mutex_init(&mvm->mutex);
 403         spin_lock_init(&mvm->async_handlers_lock);
 404         INIT_LIST_HEAD(&mvm->time_event_list);
 405         INIT_LIST_HEAD(&mvm->async_handlers_list);
 406         spin_lock_init(&mvm->time_event_lock);
 407
 408         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 409         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 410         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 411         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 412
 413         spin_lock_init(&mvm->d0i3_tx_lock);
 414         skb_queue_head_init(&mvm->d0i3_tx);
 415         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 416
 417         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 418
 419         /*
 420          * Populate the state variables that the transport layer needs
 421          * to know about.
 422          */
 423         trans_cfg.op_mode = op_mode;
 424         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 425         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 426         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 427
 428         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 429                 trans_cfg.bc_table_dword = true;
 430
 431         if (!iwlwifi_mod_params.wd_disable)
 432                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 433         else
 434                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 435
 436         trans_cfg.command_names = iwl_mvm_cmd_strings;
 437
 438         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 439         trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
 440
 441         snprintf(mvm->hw->wiphy->fw_version,
 442                  sizeof(mvm->hw->wiphy->fw_version),
 443                  "%s", fw->fw_version);
 444
 445         /* Configure transport layer */
 446         iwl_trans_configure(mvm->trans, &trans_cfg);
 447
 448         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 449         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 450
 451         /* set up notification wait support */
 452         iwl_notification_wait_init(&mvm->notif_wait);
 453
 454         /* Init phy db */
 455         mvm->phy_db = iwl_phy_db_init(trans);
 456         if (!mvm->phy_db) {
 457                 IWL_ERR(mvm, "Cannot init phy_db\n");
 458                 goto out_free;
 459         }
 460
 461         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 462                  mvm->cfg->name, mvm->trans->hw_rev);
 463
 464         min_backoff = calc_min_backoff(trans, cfg);
 465         iwl_mvm_tt_initialize(mvm, min_backoff);
 466
 467         /*
 468          * If the NVM exists in an external file,
 469          * there is no need to unnecessarily power up the NIC at driver load
 470          */
 471         if (iwlwifi_mod_params.nvm_file) {
 472                 err = iwl_nvm_init(mvm);
 473                 if (err)
 474                         goto out_free;
 475         } else {
 476                 err = iwl_trans_start_hw(mvm->trans);
 477                 if (err)
 478                         goto out_free;
 479
 480                 mutex_lock(&mvm->mutex);
 481                 err = iwl_run_init_mvm_ucode(mvm, true);
 482                 iwl_trans_stop_device(trans);
 483                 mutex_unlock(&mvm->mutex);
 484                 /* returns 0 if successful, 1 if success but in rfkill */
 485                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 486                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 487                         goto out_free;
 488                 }
 489         }
 490
 491         scan_size = sizeof(struct iwl_scan_cmd) +
 492                 mvm->fw->ucode_capa.max_probe_length +
 493                 (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel));
 494         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 495         if (!mvm->scan_cmd)
 496                 goto out_free;
 497
 498         err = iwl_mvm_mac_setup_register(mvm);
 499         if (err)
 500                 goto out_free;
 501
 502         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 503         if (err)
 504                 goto out_unregister;
 505
 506         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 507
 508         /* rpm starts with a taken ref. only set the appropriate bit here. */
 509         set_bit(IWL_MVM_REF_UCODE_DOWN, mvm->ref_bitmap);
 510
 511         return op_mode;
 512
 513  out_unregister:
 514         ieee80211_unregister_hw(mvm->hw);
 515         iwl_mvm_leds_exit(mvm);
 516  out_free:
 517         iwl_phy_db_free(mvm->phy_db);
 518         kfree(mvm->scan_cmd);
 519         if (!iwlwifi_mod_params.nvm_file)
 520                 iwl_trans_op_mode_leave(trans);
 521         ieee80211_free_hw(mvm->hw);
 522         return NULL;
 523 }
 524
 525 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 526 {
 527         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 528         int i;
 529
 530         iwl_mvm_leds_exit(mvm);
 531
 532         iwl_mvm_tt_exit(mvm);
 533
 534         ieee80211_unregister_hw(mvm->hw);
 535
 536         kfree(mvm->scan_cmd);
 537         kfree(mvm->mcast_filter_cmd);
 538         mvm->mcast_filter_cmd = NULL;
 539
 540 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 541         kfree(mvm->d3_resume_sram);
 542 #endif
 543
 544         iwl_trans_op_mode_leave(mvm->trans);
 545
 546         iwl_phy_db_free(mvm->phy_db);
 547         mvm->phy_db = NULL;
 548
 549         iwl_free_nvm_data(mvm->nvm_data);
 550         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 551                 kfree(mvm->nvm_sections[i].data);
 552
 553         ieee80211_free_hw(mvm->hw);
 554 }
 555
 556 struct iwl_async_handler_entry {
 557         struct list_head list;
 558         struct iwl_rx_cmd_buffer rxb;
 559         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 560                   struct iwl_device_cmd *cmd);
 561 };
 562
 563 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 564 {
 565         struct iwl_async_handler_entry *entry, *tmp;
 566
 567         spin_lock_bh(&mvm->async_handlers_lock);
 568         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 569                 iwl_free_rxb(&entry->rxb);
 570                 list_del(&entry->list);
 571                 kfree(entry);
 572         }
 573         spin_unlock_bh(&mvm->async_handlers_lock);
 574 }
 575
 576 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 577 {
 578         struct iwl_mvm *mvm =
 579                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 580         struct iwl_async_handler_entry *entry, *tmp;
 581         struct list_head local_list;
 582
 583         INIT_LIST_HEAD(&local_list);
 584
 585         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 586         mutex_lock(&mvm->mutex);
 587
 588         /*
 589          * Sync with Rx path with a lock. Remove all the entries from this list,
 590          * add them to a local one (lock free), and then handle them.
 591          */
 592         spin_lock_bh(&mvm->async_handlers_lock);
 593         list_splice_init(&mvm->async_handlers_list, &local_list);
 594         spin_unlock_bh(&mvm->async_handlers_lock);
 595
 596         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 597                 if (entry->fn(mvm, &entry->rxb, NULL))
 598                         IWL_WARN(mvm,
 599                                  "returned value from ASYNC handlers are ignored\n");
 600                 iwl_free_rxb(&entry->rxb);
 601                 list_del(&entry->list);
 602                 kfree(entry);
 603         }
 604         mutex_unlock(&mvm->mutex);
 605 }
 606
 607 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 608                                struct iwl_rx_cmd_buffer *rxb,
 609                                struct iwl_device_cmd *cmd)
 610 {
 611         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 612         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 613         u8 i;
 614
 615         /*
 616          * Do the notification wait before RX handlers so
 617          * even if the RX handler consumes the RXB we have
 618          * access to it in the notification wait entry.
 619          */
 620         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 621
 622         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 623                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 624                 struct iwl_async_handler_entry *entry;
 625
 626                 if (rx_h->cmd_id != pkt->hdr.cmd)
 627                         continue;
 628
 629                 if (!rx_h->async)
 630                         return rx_h->fn(mvm, rxb, cmd);
 631
 632                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 633                 /* we can't do much... */
 634                 if (!entry)
 635                         return 0;
 636
 637                 entry->rxb._page = rxb_steal_page(rxb);
 638                 entry->rxb._offset = rxb->_offset;
 639                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 640                 entry->fn = rx_h->fn;
 641                 spin_lock(&mvm->async_handlers_lock);
 642                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 643                 spin_unlock(&mvm->async_handlers_lock);
 644                 schedule_work(&mvm->async_handlers_wk);
 645                 break;
 646         }
 647
 648         return 0;
 649 }
 650
 651 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 652 {
 653         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 654         int mq = mvm->queue_to_mac80211[queue];
 655
 656         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 657                 return;
 658
 659         if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
 660                 IWL_DEBUG_TX_QUEUES(mvm,
 661                                     "queue %d (mac80211 %d) already stopped\n",
 662                                     queue, mq);
 663                 return;
 664         }
 665
 666         set_bit(mq, &mvm->transport_queue_stop);
 667         ieee80211_stop_queue(mvm->hw, mq);
 668 }
 669
 670 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 671 {
 672         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 673         int mq = mvm->queue_to_mac80211[queue];
 674
 675         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 676                 return;
 677
 678         if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
 679                 IWL_DEBUG_TX_QUEUES(mvm,
 680                                     "queue %d (mac80211 %d) already awake\n",
 681                                     queue, mq);
 682                 return;
 683         }
 684
 685         clear_bit(mq, &mvm->transport_queue_stop);
 686
 687         ieee80211_wake_queue(mvm->hw, mq);
 688 }
 689
 690 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 691 {
 692         if (state)
 693                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 694         else
 695                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 696
 697         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 698 }
 699
 700 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 701 {
 702         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 703
 704         if (state)
 705                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 706         else
 707                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 708
 709         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 710
 711         return state && mvm->cur_ucode != IWL_UCODE_INIT;
 712 }
 713
 714 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 715 {
 716         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 717         struct ieee80211_tx_info *info;
 718
 719         info = IEEE80211_SKB_CB(skb);
 720         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 721         ieee80211_free_txskb(mvm->hw, skb);
 722 }
 723
 724 struct iwl_mvm_reprobe {
 725         struct device *dev;
 726         struct work_struct work;
 727 };
 728
 729 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 730 {
 731         struct iwl_mvm_reprobe *reprobe;
 732
 733         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 734         if (device_reprobe(reprobe->dev))
 735                 dev_err(reprobe->dev, "reprobe failed!\n");
 736         kfree(reprobe);
 737         module_put(THIS_MODULE);
 738 }
 739
 740 static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
 741 {
 742         iwl_abort_notification_waits(&mvm->notif_wait);
 743
 744         /*
 745          * This is a bit racy, but worst case we tell mac80211 about
 746          * a stopped/aborted scan when that was already done which
 747          * is not a problem. It is necessary to abort any os scan
 748          * here because mac80211 requires having the scan cleared
 749          * before restarting.
 750          * We'll reset the scan_status to NONE in restart cleanup in
 751          * the next start() call from mac80211. If restart isn't called
 752          * (no fw restart) scan status will stay busy.
 753          */
 754         switch (mvm->scan_status) {
 755         case IWL_MVM_SCAN_NONE:
 756                 break;
 757         case IWL_MVM_SCAN_OS:
 758                 ieee80211_scan_completed(mvm->hw, true);
 759                 break;
 760         case IWL_MVM_SCAN_SCHED:
 761                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 762                 if (!mvm->restart_fw)
 763                         ieee80211_sched_scan_stopped(mvm->hw);
 764                 break;
 765         }
 766
 767         /*
 768          * If we're restarting already, don't cycle restarts.
 769          * If INIT fw asserted, it will likely fail again.
 770          * If WoWLAN fw asserted, don't restart either, mac80211
 771          * can't recover this since we're already half suspended.
 772          */
 773         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 774                 struct iwl_mvm_reprobe *reprobe;
 775
 776                 IWL_ERR(mvm,
 777                         "Firmware error during reconfiguration - reprobe!\n");
 778
 779                 /*
 780                  * get a module reference to avoid doing this while unloading
 781                  * anyway and to avoid scheduling a work with code that's
 782                  * being removed.
 783                  */
 784                 if (!try_module_get(THIS_MODULE)) {
 785                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 786                         return;
 787                 }
 788
 789                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 790                 if (!reprobe) {
 791                         module_put(THIS_MODULE);
 792                         return;
 793                 }
 794                 reprobe->dev = mvm->trans->dev;
 795                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 796                 schedule_work(&reprobe->work);
 797         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
 798                 /* don't let the transport/FW power down */
 799                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 800
 801                 if (mvm->restart_fw > 0)
 802                         mvm->restart_fw--;
 803                 ieee80211_restart_hw(mvm->hw);
 804         }
 805 }
 806
 807 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 808 {
 809         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 810
 811         iwl_mvm_dump_nic_error_log(mvm);
 812         if (!mvm->restart_fw)
 813                 iwl_mvm_dump_sram(mvm);
 814
 815         iwl_mvm_nic_restart(mvm);
 816 }
 817
 818 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 819 {
 820         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 821
 822         WARN_ON(1);
 823         iwl_mvm_nic_restart(mvm);
 824 }
 825
 826 struct iwl_d0i3_iter_data {
 827         struct iwl_mvm *mvm;
 828         u8 ap_sta_id;
 829         u8 vif_count;
 830         u8 offloading_tid;
 831         bool disable_offloading;
 832 };
 833
 834 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 835                                         struct ieee80211_vif *vif,
 836                                         struct iwl_d0i3_iter_data *iter_data)
 837 {
 838         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 839         struct ieee80211_sta *ap_sta;
 840         struct iwl_mvm_sta *mvmsta;
 841         u32 available_tids = 0;
 842         u8 tid;
 843
 844         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 845                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 846                 return false;
 847
 848         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 849         if (IS_ERR_OR_NULL(ap_sta))
 850                 return false;
 851
 852         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 853         spin_lock_bh(&mvmsta->lock);
 854         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 855                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 856
 857                 /*
 858                  * in case of pending tx packets, don't use this tid
 859                  * for offloading in order to prevent reuse of the same
 860                  * qos seq counters.
 861                  */
 862                 if (iwl_mvm_tid_queued(tid_data))
 863                         continue;
 864
 865                 if (tid_data->state != IWL_AGG_OFF)
 866                         continue;
 867
 868                 available_tids |= BIT(tid);
 869         }
 870         spin_unlock_bh(&mvmsta->lock);
 871
 872         /*
 873          * disallow protocol offloading if we have no available tid
 874          * (with no pending frames and no active aggregation,
 875          * as we don't handle "holes" properly - the scheduler needs the
 876          * frame's seq number and TFD index to match)
 877          */
 878         if (!available_tids)
 879                 return true;
 880
 881         /* for simplicity, just use the first available tid */
 882         iter_data->offloading_tid = ffs(available_tids) - 1;
 883         return false;
 884 }
 885
 886 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 887                                         struct ieee80211_vif *vif)
 888 {
 889         struct iwl_d0i3_iter_data *data = _data;
 890         struct iwl_mvm *mvm = data->mvm;
 891         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 892         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 893
 894         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 895         if (vif->type != NL80211_IFTYPE_STATION ||
 896             !vif->bss_conf.assoc)
 897                 return;
 898
 899         /*
 900          * in case of pending tx packets or active aggregations,
 901          * avoid offloading features in order to prevent reuse of
 902          * the same qos seq counters.
 903          */
 904         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 905                 data->disable_offloading = true;
 906
 907         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 908         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 909
 910         /*
 911          * on init/association, mvm already configures POWER_TABLE_CMD
 912          * and REPLY_MCAST_FILTER_CMD, so currently don't
 913          * reconfigure them (we might want to use different
 914          * params later on, though).
 915          */
 916         data->ap_sta_id = mvmvif->ap_sta_id;
 917         data->vif_count++;
 918 }
 919
 920 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
 921                                     struct iwl_wowlan_config_cmd_v3 *cmd,
 922                                     struct iwl_d0i3_iter_data *iter_data)
 923 {
 924         struct ieee80211_sta *ap_sta;
 925         struct iwl_mvm_sta *mvm_ap_sta;
 926
 927         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
 928                 return;
 929
 930         rcu_read_lock();
 931
 932         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
 933         if (IS_ERR_OR_NULL(ap_sta))
 934                 goto out;
 935
 936         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 937         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
 938         cmd->offloading_tid = iter_data->offloading_tid;
 939
 940         /*
 941          * The d0i3 uCode takes care of the nonqos counters,
 942          * so configure only the qos seq ones.
 943          */
 944         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
 945 out:
 946         rcu_read_unlock();
 947 }
 948 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
 949 {
 950         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 951         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 952         int ret;
 953         struct iwl_d0i3_iter_data d0i3_iter_data = {
 954                 .mvm = mvm,
 955         };
 956         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
 957                 .common = {
 958                         .wakeup_filter =
 959                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
 960                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
 961                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
 962                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
 963                 },
 964         };
 965         struct iwl_d3_manager_config d3_cfg_cmd = {
 966                 .min_sleep_time = cpu_to_le32(1000),
 967         };
 968
 969         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
 970
 971         /* make sure we have no running tx while configuring the qos */
 972         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 973         synchronize_net();
 974
 975         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 976                                                    IEEE80211_IFACE_ITER_NORMAL,
 977                                                    iwl_mvm_enter_d0i3_iterator,
 978                                                    &d0i3_iter_data);
 979         if (d0i3_iter_data.vif_count == 1) {
 980                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
 981                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
 982         } else {
 983                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
 984                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 985                 mvm->d0i3_offloading = false;
 986         }
 987
 988         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
 989         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
 990                                    sizeof(wowlan_config_cmd),
 991                                    &wowlan_config_cmd);
 992         if (ret)
 993                 return ret;
 994
 995         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
 996                                     flags | CMD_MAKE_TRANS_IDLE,
 997                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
 998 }
 999
1000 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1001                                        struct ieee80211_vif *vif)
1002 {
1003         struct iwl_mvm *mvm = _data;
1004         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1005
1006         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1007         if (vif->type != NL80211_IFTYPE_STATION ||
1008             !vif->bss_conf.assoc)
1009                 return;
1010
1011         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1012 }
1013
1014 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1015                                          struct ieee80211_vif *vif)
1016 {
1017         struct iwl_mvm *mvm = data;
1018         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1019
1020         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1021             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1022                 ieee80211_connection_loss(vif);
1023 }
1024
1025 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1026 {
1027         struct ieee80211_sta *sta = NULL;
1028         struct iwl_mvm_sta *mvm_ap_sta;
1029         int i;
1030         bool wake_queues = false;
1031
1032         lockdep_assert_held(&mvm->mutex);
1033
1034         spin_lock_bh(&mvm->d0i3_tx_lock);
1035
1036         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1037                 goto out;
1038
1039         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1040
1041         /* get the sta in order to update seq numbers and re-enqueue skbs */
1042         sta = rcu_dereference_protected(
1043                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1044                         lockdep_is_held(&mvm->mutex));
1045
1046         if (IS_ERR_OR_NULL(sta)) {
1047                 sta = NULL;
1048                 goto out;
1049         }
1050
1051         if (mvm->d0i3_offloading && qos_seq) {
1052                 /* update qos seq numbers if offloading was enabled */
1053                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1054                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1055                         u16 seq = le16_to_cpu(qos_seq[i]);
1056                         /* firmware stores last-used one, we store next one */
1057                         seq += 0x10;
1058                         mvm_ap_sta->tid_data[i].seq_number = seq;
1059                 }
1060         }
1061 out:
1062         /* re-enqueue (or drop) all packets */
1063         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1064                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1065
1066                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1067                         ieee80211_free_txskb(mvm->hw, skb);
1068
1069                 /* if the skb_queue is not empty, we need to wake queues */
1070                 wake_queues = true;
1071         }
1072         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1073         wake_up(&mvm->d0i3_exit_waitq);
1074         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1075         if (wake_queues)
1076                 ieee80211_wake_queues(mvm->hw);
1077
1078         spin_unlock_bh(&mvm->d0i3_tx_lock);
1079 }
1080
1081 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1082 {
1083         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1084         struct iwl_host_cmd get_status_cmd = {
1085                 .id = WOWLAN_GET_STATUSES,
1086                 .flags = CMD_SYNC | CMD_HIGH_PRIO | CMD_WANT_SKB,
1087         };
1088         struct iwl_wowlan_status_v6 *status;
1089         int ret;
1090         u32 disconnection_reasons, wakeup_reasons;
1091         __le16 *qos_seq = NULL;
1092
1093         mutex_lock(&mvm->mutex);
1094         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1095         if (ret)
1096                 goto out;
1097
1098         if (!get_status_cmd.resp_pkt)
1099                 goto out;
1100
1101         status = (void *)get_status_cmd.resp_pkt->data;
1102         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1103         qos_seq = status->qos_seq_ctr;
1104
1105         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1106
1107         disconnection_reasons =
1108                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1109                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1110         if (wakeup_reasons & disconnection_reasons)
1111                 ieee80211_iterate_active_interfaces(
1112                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1113                         iwl_mvm_d0i3_disconnect_iter, mvm);
1114
1115         iwl_free_resp(&get_status_cmd);
1116 out:
1117         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1118         mutex_unlock(&mvm->mutex);
1119 }
1120
1121 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1122 {
1123         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1124         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1125                     CMD_WAKE_UP_TRANS;
1126         int ret;
1127
1128         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1129
1130         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1131         if (ret)
1132                 goto out;
1133
1134         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1135                                                    IEEE80211_IFACE_ITER_NORMAL,
1136                                                    iwl_mvm_exit_d0i3_iterator,
1137                                                    mvm);
1138 out:
1139         schedule_work(&mvm->d0i3_exit_work);
1140         return ret;
1141 }
1142
1143 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1144         .start = iwl_op_mode_mvm_start,
1145         .stop = iwl_op_mode_mvm_stop,
1146         .rx = iwl_mvm_rx_dispatch,
1147         .queue_full = iwl_mvm_stop_sw_queue,
1148         .queue_not_full = iwl_mvm_wake_sw_queue,
1149         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1150         .free_skb = iwl_mvm_free_skb,
1151         .nic_error = iwl_mvm_nic_error,
1152         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1153         .nic_config = iwl_mvm_nic_config,
1154         .enter_d0i3 = iwl_mvm_enter_d0i3,
1155         .exit_d0i3 = iwl_mvm_exit_d0i3,
1156 };