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  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
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  21  * along with this program; if not, write to the Free Software
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  23  * USA
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  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/module.h>
  66 #include <linux/vmalloc.h>
  67 #include <net/mac80211.h>
  68
  69 #include "iwl-notif-wait.h"
  70 #include "iwl-trans.h"
  71 #include "iwl-op-mode.h"
  72 #include "iwl-fw.h"
  73 #include "iwl-debug.h"
  74 #include "iwl-drv.h"
  75 #include "iwl-modparams.h"
  76 #include "mvm.h"
  77 #include "iwl-phy-db.h"
  78 #include "iwl-eeprom-parse.h"
  79 #include "iwl-csr.h"
  80 #include "iwl-io.h"
  81 #include "iwl-prph.h"
  82 #include "rs.h"
  83 #include "fw-api-scan.h"
  84 #include "time-event.h"
  85 #include "iwl-fw-error-dump.h"
  86
  87 /*
  88  * module name, copyright, version, etc.
  89  */
  90 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  91
  92 #define DRV_VERSION     IWLWIFI_VERSION
  93
  94 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  95 MODULE_VERSION(DRV_VERSION);
  96 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  97 MODULE_LICENSE("GPL");
  98
  99 static const struct iwl_op_mode_ops iwl_mvm_ops;
 100
 101 struct iwl_mvm_mod_params iwlmvm_mod_params = {
 102         .power_scheme = IWL_POWER_SCHEME_BPS,
 103         /* rest of fields are 0 by default */
 104 };
 105
 106 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 107 MODULE_PARM_DESC(init_dbg,
 108                  "set to true to debug an ASSERT in INIT fw (default: false");
 109 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 110 MODULE_PARM_DESC(power_scheme,
 111                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 112
 113 /*
 114  * module init and exit functions
 115  */
 116 static int __init iwl_mvm_init(void)
 117 {
 118         int ret;
 119
 120         ret = iwl_mvm_rate_control_register();
 121         if (ret) {
 122                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 123                 return ret;
 124         }
 125
 126         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 127
 128         if (ret) {
 129                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 130                 iwl_mvm_rate_control_unregister();
 131         }
 132
 133         return ret;
 134 }
 135 module_init(iwl_mvm_init);
 136
 137 static void __exit iwl_mvm_exit(void)
 138 {
 139         iwl_opmode_deregister("iwlmvm");
 140         iwl_mvm_rate_control_unregister();
 141 }
 142 module_exit(iwl_mvm_exit);
 143
 144 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 145 {
 146         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 147         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 148         u32 reg_val = 0;
 149
 150         radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 151                           FW_PHY_CFG_RADIO_TYPE_POS;
 152         radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
 153                           FW_PHY_CFG_RADIO_STEP_POS;
 154         radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
 155                           FW_PHY_CFG_RADIO_DASH_POS;
 156
 157         /* SKU control */
 158         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 160         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 161                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 162
 163         /* radio configuration */
 164         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 165         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 166         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 167
 168         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 169                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 170
 171         /*
 172          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 173          * shouldn't be set to any non-zero value. The same is supposed to be
 174          * true of the other HW, but unsetting them (such as the 7260) causes
 175          * automatic tests to fail on seemingly unrelated errors. Need to
 176          * further investigate this, but for now we'll separate cases.
 177          */
 178         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 179                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 180
 181         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 182                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 185                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 186                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 187                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 188                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 189                                 reg_val);
 190
 191         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 192                        radio_cfg_step, radio_cfg_dash);
 193
 194         /*
 195          * W/A : NIC is stuck in a reset state after Early PCIe power off
 196          * (PCIe power is lost before PERST# is asserted), causing ME FW
 197          * to lose ownership and not being able to obtain it back.
 198          */
 199         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 200                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 201                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 202                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 203 }
 204
 205 struct iwl_rx_handlers {
 206         u8 cmd_id;
 207         bool async;
 208         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 209                   struct iwl_device_cmd *cmd);
 210 };
 211
 212 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 213         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 214
 215 /*
 216  * Handlers for fw notifications
 217  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 218  * This list should be in order of frequency for performance purposes.
 219  *
 220  * The handler can be SYNC - this means that it will be called in the Rx path
 221  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 222  * only in this case!), it should be set as ASYNC. In that case, it will be
 223  * called from a worker with mvm->mutex held.
 224  */
 225 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 226         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 227         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 228         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 229         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 230
 231         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 232         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 233         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 234         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 235                    iwl_mvm_rx_ant_coupling_notif, true),
 236
 237         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 238
 239         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 240
 241         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 242         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 243         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 244                    iwl_mvm_rx_scan_offload_complete_notif, true),
 245         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
 246                    false),
 247
 248         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 249         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 250
 251         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 252                    false),
 253
 254         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 255         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 256                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 257 };
 258 #undef RX_HANDLER
 259 #define CMD(x) [x] = #x
 260
 261 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 262         CMD(MVM_ALIVE),
 263         CMD(REPLY_ERROR),
 264         CMD(INIT_COMPLETE_NOTIF),
 265         CMD(PHY_CONTEXT_CMD),
 266         CMD(MGMT_MCAST_KEY),
 267         CMD(TX_CMD),
 268         CMD(TXPATH_FLUSH),
 269         CMD(MAC_CONTEXT_CMD),
 270         CMD(TIME_EVENT_CMD),
 271         CMD(TIME_EVENT_NOTIFICATION),
 272         CMD(BINDING_CONTEXT_CMD),
 273         CMD(TIME_QUOTA_CMD),
 274         CMD(NON_QOS_TX_COUNTER_CMD),
 275         CMD(RADIO_VERSION_NOTIFICATION),
 276         CMD(SCAN_REQUEST_CMD),
 277         CMD(SCAN_ABORT_CMD),
 278         CMD(SCAN_START_NOTIFICATION),
 279         CMD(SCAN_RESULTS_NOTIFICATION),
 280         CMD(SCAN_COMPLETE_NOTIFICATION),
 281         CMD(NVM_ACCESS_CMD),
 282         CMD(PHY_CONFIGURATION_CMD),
 283         CMD(CALIB_RES_NOTIF_PHY_DB),
 284         CMD(SET_CALIB_DEFAULT_CMD),
 285         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 286         CMD(ADD_STA_KEY),
 287         CMD(ADD_STA),
 288         CMD(REMOVE_STA),
 289         CMD(LQ_CMD),
 290         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 291         CMD(MATCH_FOUND_NOTIFICATION),
 292         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 293         CMD(SCAN_OFFLOAD_ABORT_CMD),
 294         CMD(HOT_SPOT_CMD),
 295         CMD(SCAN_OFFLOAD_COMPLETE),
 296         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 297         CMD(SCAN_ITERATION_COMPLETE),
 298         CMD(POWER_TABLE_CMD),
 299         CMD(WEP_KEY),
 300         CMD(REPLY_RX_PHY_CMD),
 301         CMD(REPLY_RX_MPDU_CMD),
 302         CMD(BEACON_NOTIFICATION),
 303         CMD(BEACON_TEMPLATE_CMD),
 304         CMD(STATISTICS_NOTIFICATION),
 305         CMD(EOSP_NOTIFICATION),
 306         CMD(REDUCE_TX_POWER_CMD),
 307         CMD(TX_ANT_CONFIGURATION_CMD),
 308         CMD(D3_CONFIG_CMD),
 309         CMD(D0I3_END_CMD),
 310         CMD(PROT_OFFLOAD_CONFIG_CMD),
 311         CMD(OFFLOADS_QUERY_CMD),
 312         CMD(REMOTE_WAKE_CONFIG_CMD),
 313         CMD(WOWLAN_PATTERNS),
 314         CMD(WOWLAN_CONFIGURATION),
 315         CMD(WOWLAN_TSC_RSC_PARAM),
 316         CMD(WOWLAN_TKIP_PARAM),
 317         CMD(WOWLAN_KEK_KCK_MATERIAL),
 318         CMD(WOWLAN_GET_STATUSES),
 319         CMD(WOWLAN_TX_POWER_PER_DB),
 320         CMD(NET_DETECT_CONFIG_CMD),
 321         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 322         CMD(NET_DETECT_PROFILES_CMD),
 323         CMD(NET_DETECT_HOTSPOTS_CMD),
 324         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 325         CMD(CARD_STATE_NOTIFICATION),
 326         CMD(MISSED_BEACONS_NOTIFICATION),
 327         CMD(BT_COEX_PRIO_TABLE),
 328         CMD(BT_COEX_PROT_ENV),
 329         CMD(BT_PROFILE_NOTIFICATION),
 330         CMD(BT_CONFIG),
 331         CMD(MCAST_FILTER_CMD),
 332         CMD(BCAST_FILTER_CMD),
 333         CMD(REPLY_SF_CFG_CMD),
 334         CMD(REPLY_BEACON_FILTERING_CMD),
 335         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 336         CMD(DTS_MEASUREMENT_NOTIFICATION),
 337         CMD(REPLY_THERMAL_MNG_BACKOFF),
 338         CMD(MAC_PM_POWER_TABLE),
 339         CMD(BT_COEX_CI),
 340         CMD(BT_COEX_UPDATE_SW_BOOST),
 341         CMD(BT_COEX_UPDATE_CORUN_LUT),
 342         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 343         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 344         CMD(ANTENNA_COUPLING_NOTIFICATION),
 345         CMD(SCD_QUEUE_CFG),
 346 };
 347 #undef CMD
 348
 349 /* this forward declaration can avoid to export the function */
 350 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 351 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 352
 353 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 354 {
 355         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 356
 357         if (!pwr_tx_backoff)
 358                 return 0;
 359
 360         while (pwr_tx_backoff->pwr) {
 361                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 362                         return pwr_tx_backoff->backoff;
 363
 364                 pwr_tx_backoff++;
 365         }
 366
 367         return 0;
 368 }
 369
 370 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 371
 372 static struct iwl_op_mode *
 373 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 374                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 375 {
 376         struct ieee80211_hw *hw;
 377         struct iwl_op_mode *op_mode;
 378         struct iwl_mvm *mvm;
 379         struct iwl_trans_config trans_cfg = {};
 380         static const u8 no_reclaim_cmds[] = {
 381                 TX_CMD,
 382         };
 383         int err, scan_size;
 384         u32 min_backoff;
 385
 386         /*
 387          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 388          * index all over the driver - check that its value corresponds to the
 389          * array size.
 390          */
 391         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 392
 393         /********************************
 394          * 1. Allocating and configuring HW data
 395          ********************************/
 396         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 397                                 sizeof(struct iwl_mvm),
 398                                 &iwl_mvm_hw_ops);
 399         if (!hw)
 400                 return NULL;
 401
 402         if (cfg->max_rx_agg_size)
 403                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 404
 405         op_mode = hw->priv;
 406         op_mode->ops = &iwl_mvm_ops;
 407
 408         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 409         mvm->dev = trans->dev;
 410         mvm->trans = trans;
 411         mvm->cfg = cfg;
 412         mvm->fw = fw;
 413         mvm->hw = hw;
 414
 415         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 416
 417         mvm->aux_queue = 15;
 418         mvm->first_agg_queue = 16;
 419         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 420         if (mvm->cfg->base_params->num_of_queues == 16) {
 421                 mvm->aux_queue = 11;
 422                 mvm->first_agg_queue = 12;
 423         }
 424         mvm->sf_state = SF_UNINIT;
 425         mvm->low_latency_agg_frame_limit = 6;
 426
 427         mutex_init(&mvm->mutex);
 428         mutex_init(&mvm->d0i3_suspend_mutex);
 429         spin_lock_init(&mvm->async_handlers_lock);
 430         INIT_LIST_HEAD(&mvm->time_event_list);
 431         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 432         INIT_LIST_HEAD(&mvm->async_handlers_list);
 433         spin_lock_init(&mvm->time_event_lock);
 434
 435         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 436         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 437         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 438         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 439         INIT_WORK(&mvm->fw_error_dump_wk, iwl_mvm_fw_error_dump_wk);
 440
 441         spin_lock_init(&mvm->d0i3_tx_lock);
 442         spin_lock_init(&mvm->refs_lock);
 443         skb_queue_head_init(&mvm->d0i3_tx);
 444         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 445
 446         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 447
 448         /*
 449          * Populate the state variables that the transport layer needs
 450          * to know about.
 451          */
 452         trans_cfg.op_mode = op_mode;
 453         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 454         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 455         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 456
 457         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 458                 trans_cfg.bc_table_dword = true;
 459
 460         if (!iwlwifi_mod_params.wd_disable)
 461                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 462         else
 463                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 464
 465         trans_cfg.command_names = iwl_mvm_cmd_strings;
 466
 467         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 468         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 469         trans_cfg.scd_set_active = true;
 470
 471         snprintf(mvm->hw->wiphy->fw_version,
 472                  sizeof(mvm->hw->wiphy->fw_version),
 473                  "%s", fw->fw_version);
 474
 475         /* Configure transport layer */
 476         iwl_trans_configure(mvm->trans, &trans_cfg);
 477
 478         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 479         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 480
 481         /* set up notification wait support */
 482         iwl_notification_wait_init(&mvm->notif_wait);
 483
 484         /* Init phy db */
 485         mvm->phy_db = iwl_phy_db_init(trans);
 486         if (!mvm->phy_db) {
 487                 IWL_ERR(mvm, "Cannot init phy_db\n");
 488                 goto out_free;
 489         }
 490
 491         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 492                  mvm->cfg->name, mvm->trans->hw_rev);
 493
 494         min_backoff = calc_min_backoff(trans, cfg);
 495         iwl_mvm_tt_initialize(mvm, min_backoff);
 496         /* set the nvm_file_name according to priority */
 497         if (iwlwifi_mod_params.nvm_file)
 498                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 499         else
 500                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 501
 502         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 503                  "not allowing power-up and not having nvm_file\n"))
 504                 goto out_free;
 505
 506         /*
 507          * Even if nvm exists in the nvm_file driver should read again the nvm
 508          * from the nic because there might be entries that exist in the OTP
 509          * and not in the file.
 510          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 511          */
 512         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 513                 err = iwl_nvm_init(mvm, false);
 514                 if (err)
 515                         goto out_free;
 516         } else {
 517                 err = iwl_trans_start_hw(mvm->trans);
 518                 if (err)
 519                         goto out_free;
 520
 521                 mutex_lock(&mvm->mutex);
 522                 err = iwl_run_init_mvm_ucode(mvm, true);
 523                 iwl_trans_stop_device(trans);
 524                 mutex_unlock(&mvm->mutex);
 525                 /* returns 0 if successful, 1 if success but in rfkill */
 526                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 527                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 528                         goto out_free;
 529                 }
 530         }
 531
 532         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 533                 scan_size = sizeof(struct iwl_scan_req_unified_lmac) +
 534                         sizeof(struct iwl_scan_channel_cfg_lmac) *
 535                                 mvm->fw->ucode_capa.n_scan_channels +
 536                         sizeof(struct iwl_scan_probe_req);
 537         else
 538                 scan_size = sizeof(struct iwl_scan_cmd) +
 539                         mvm->fw->ucode_capa.max_probe_length +
 540                         mvm->fw->ucode_capa.n_scan_channels *
 541                                 sizeof(struct iwl_scan_channel);
 542
 543         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 544         if (!mvm->scan_cmd)
 545                 goto out_free;
 546
 547         err = iwl_mvm_mac_setup_register(mvm);
 548         if (err)
 549                 goto out_free;
 550
 551         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 552         if (err)
 553                 goto out_unregister;
 554
 555         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 556
 557         /* rpm starts with a taken ref. only set the appropriate bit here. */
 558         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 559
 560         return op_mode;
 561
 562  out_unregister:
 563         ieee80211_unregister_hw(mvm->hw);
 564         iwl_mvm_leds_exit(mvm);
 565  out_free:
 566         iwl_phy_db_free(mvm->phy_db);
 567         kfree(mvm->scan_cmd);
 568         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 569                 iwl_trans_op_mode_leave(trans);
 570         ieee80211_free_hw(mvm->hw);
 571         return NULL;
 572 }
 573
 574 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 575 {
 576         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 577         int i;
 578
 579         iwl_mvm_leds_exit(mvm);
 580
 581         iwl_mvm_tt_exit(mvm);
 582
 583         ieee80211_unregister_hw(mvm->hw);
 584
 585         kfree(mvm->scan_cmd);
 586         if (mvm->fw_error_dump) {
 587                 vfree(mvm->fw_error_dump->op_mode_ptr);
 588                 vfree(mvm->fw_error_dump->trans_ptr);
 589                 kfree(mvm->fw_error_dump);
 590         }
 591         kfree(mvm->mcast_filter_cmd);
 592         mvm->mcast_filter_cmd = NULL;
 593
 594 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 595         kfree(mvm->d3_resume_sram);
 596 #endif
 597
 598         iwl_trans_op_mode_leave(mvm->trans);
 599
 600         iwl_phy_db_free(mvm->phy_db);
 601         mvm->phy_db = NULL;
 602
 603         iwl_free_nvm_data(mvm->nvm_data);
 604         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 605                 kfree(mvm->nvm_sections[i].data);
 606
 607         ieee80211_free_hw(mvm->hw);
 608 }
 609
 610 struct iwl_async_handler_entry {
 611         struct list_head list;
 612         struct iwl_rx_cmd_buffer rxb;
 613         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 614                   struct iwl_device_cmd *cmd);
 615 };
 616
 617 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 618 {
 619         struct iwl_async_handler_entry *entry, *tmp;
 620
 621         spin_lock_bh(&mvm->async_handlers_lock);
 622         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 623                 iwl_free_rxb(&entry->rxb);
 624                 list_del(&entry->list);
 625                 kfree(entry);
 626         }
 627         spin_unlock_bh(&mvm->async_handlers_lock);
 628 }
 629
 630 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 631 {
 632         struct iwl_mvm *mvm =
 633                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 634         struct iwl_async_handler_entry *entry, *tmp;
 635         struct list_head local_list;
 636
 637         INIT_LIST_HEAD(&local_list);
 638
 639         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 640         mutex_lock(&mvm->mutex);
 641
 642         /*
 643          * Sync with Rx path with a lock. Remove all the entries from this list,
 644          * add them to a local one (lock free), and then handle them.
 645          */
 646         spin_lock_bh(&mvm->async_handlers_lock);
 647         list_splice_init(&mvm->async_handlers_list, &local_list);
 648         spin_unlock_bh(&mvm->async_handlers_lock);
 649
 650         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 651                 if (entry->fn(mvm, &entry->rxb, NULL))
 652                         IWL_WARN(mvm,
 653                                  "returned value from ASYNC handlers are ignored\n");
 654                 iwl_free_rxb(&entry->rxb);
 655                 list_del(&entry->list);
 656                 kfree(entry);
 657         }
 658         mutex_unlock(&mvm->mutex);
 659 }
 660
 661 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 662                                struct iwl_rx_cmd_buffer *rxb,
 663                                struct iwl_device_cmd *cmd)
 664 {
 665         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 666         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 667         u8 i;
 668
 669         /*
 670          * Do the notification wait before RX handlers so
 671          * even if the RX handler consumes the RXB we have
 672          * access to it in the notification wait entry.
 673          */
 674         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 675
 676         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 677                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 678                 struct iwl_async_handler_entry *entry;
 679
 680                 if (rx_h->cmd_id != pkt->hdr.cmd)
 681                         continue;
 682
 683                 if (!rx_h->async)
 684                         return rx_h->fn(mvm, rxb, cmd);
 685
 686                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 687                 /* we can't do much... */
 688                 if (!entry)
 689                         return 0;
 690
 691                 entry->rxb._page = rxb_steal_page(rxb);
 692                 entry->rxb._offset = rxb->_offset;
 693                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 694                 entry->fn = rx_h->fn;
 695                 spin_lock(&mvm->async_handlers_lock);
 696                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 697                 spin_unlock(&mvm->async_handlers_lock);
 698                 schedule_work(&mvm->async_handlers_wk);
 699                 break;
 700         }
 701
 702         return 0;
 703 }
 704
 705 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 706 {
 707         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 708         int mq = mvm->queue_to_mac80211[queue];
 709
 710         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 711                 return;
 712
 713         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 714                 IWL_DEBUG_TX_QUEUES(mvm,
 715                                     "queue %d (mac80211 %d) already stopped\n",
 716                                     queue, mq);
 717                 return;
 718         }
 719
 720         ieee80211_stop_queue(mvm->hw, mq);
 721 }
 722
 723 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 724 {
 725         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 726         int mq = mvm->queue_to_mac80211[queue];
 727
 728         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 729                 return;
 730
 731         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 732                 IWL_DEBUG_TX_QUEUES(mvm,
 733                                     "queue %d (mac80211 %d) still stopped\n",
 734                                     queue, mq);
 735                 return;
 736         }
 737
 738         ieee80211_wake_queue(mvm->hw, mq);
 739 }
 740
 741 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 742 {
 743         if (state)
 744                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 745         else
 746                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 747
 748         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 749 }
 750
 751 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 752 {
 753         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 754
 755         if (state)
 756                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 757         else
 758                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 759
 760         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 761
 762         return state && mvm->cur_ucode != IWL_UCODE_INIT;
 763 }
 764
 765 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 766 {
 767         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 768         struct ieee80211_tx_info *info;
 769
 770         info = IEEE80211_SKB_CB(skb);
 771         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 772         ieee80211_free_txskb(mvm->hw, skb);
 773 }
 774
 775 struct iwl_mvm_reprobe {
 776         struct device *dev;
 777         struct work_struct work;
 778 };
 779
 780 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 781 {
 782         struct iwl_mvm_reprobe *reprobe;
 783
 784         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 785         if (device_reprobe(reprobe->dev))
 786                 dev_err(reprobe->dev, "reprobe failed!\n");
 787         kfree(reprobe);
 788         module_put(THIS_MODULE);
 789 }
 790
 791 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 792 {
 793         struct iwl_mvm *mvm =
 794                 container_of(work, struct iwl_mvm, fw_error_dump_wk);
 795
 796         mutex_lock(&mvm->mutex);
 797         iwl_mvm_fw_error_dump(mvm);
 798         mutex_unlock(&mvm->mutex);
 799 }
 800
 801 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 802 {
 803         iwl_abort_notification_waits(&mvm->notif_wait);
 804
 805         /*
 806          * This is a bit racy, but worst case we tell mac80211 about
 807          * a stopped/aborted scan when that was already done which
 808          * is not a problem. It is necessary to abort any os scan
 809          * here because mac80211 requires having the scan cleared
 810          * before restarting.
 811          * We'll reset the scan_status to NONE in restart cleanup in
 812          * the next start() call from mac80211. If restart isn't called
 813          * (no fw restart) scan status will stay busy.
 814          */
 815         switch (mvm->scan_status) {
 816         case IWL_MVM_SCAN_NONE:
 817                 break;
 818         case IWL_MVM_SCAN_OS:
 819                 ieee80211_scan_completed(mvm->hw, true);
 820                 break;
 821         case IWL_MVM_SCAN_SCHED:
 822                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 823                 if (!mvm->restart_fw)
 824                         ieee80211_sched_scan_stopped(mvm->hw);
 825                 break;
 826         }
 827
 828         /*
 829          * If we're restarting already, don't cycle restarts.
 830          * If INIT fw asserted, it will likely fail again.
 831          * If WoWLAN fw asserted, don't restart either, mac80211
 832          * can't recover this since we're already half suspended.
 833          */
 834         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 835                 struct iwl_mvm_reprobe *reprobe;
 836
 837                 IWL_ERR(mvm,
 838                         "Firmware error during reconfiguration - reprobe!\n");
 839
 840                 /*
 841                  * get a module reference to avoid doing this while unloading
 842                  * anyway and to avoid scheduling a work with code that's
 843                  * being removed.
 844                  */
 845                 if (!try_module_get(THIS_MODULE)) {
 846                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 847                         return;
 848                 }
 849
 850                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 851                 if (!reprobe) {
 852                         module_put(THIS_MODULE);
 853                         return;
 854                 }
 855                 reprobe->dev = mvm->trans->dev;
 856                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 857                 schedule_work(&reprobe->work);
 858         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
 859                    (!fw_error || mvm->restart_fw)) {
 860                 /* don't let the transport/FW power down */
 861                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 862
 863                 if (fw_error && mvm->restart_fw > 0)
 864                         mvm->restart_fw--;
 865                 ieee80211_restart_hw(mvm->hw);
 866         } else if (fw_error) {
 867                 schedule_work(&mvm->fw_error_dump_wk);
 868         }
 869 }
 870
 871 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 872 {
 873         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 874
 875         iwl_mvm_dump_nic_error_log(mvm);
 876
 877         iwl_mvm_nic_restart(mvm, true);
 878 }
 879
 880 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 881 {
 882         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 883
 884         WARN_ON(1);
 885         iwl_mvm_nic_restart(mvm, true);
 886 }
 887
 888 struct iwl_d0i3_iter_data {
 889         struct iwl_mvm *mvm;
 890         u8 ap_sta_id;
 891         u8 vif_count;
 892         u8 offloading_tid;
 893         bool disable_offloading;
 894 };
 895
 896 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 897                                         struct ieee80211_vif *vif,
 898                                         struct iwl_d0i3_iter_data *iter_data)
 899 {
 900         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 901         struct ieee80211_sta *ap_sta;
 902         struct iwl_mvm_sta *mvmsta;
 903         u32 available_tids = 0;
 904         u8 tid;
 905
 906         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 907                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 908                 return false;
 909
 910         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 911         if (IS_ERR_OR_NULL(ap_sta))
 912                 return false;
 913
 914         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 915         spin_lock_bh(&mvmsta->lock);
 916         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 917                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 918
 919                 /*
 920                  * in case of pending tx packets, don't use this tid
 921                  * for offloading in order to prevent reuse of the same
 922                  * qos seq counters.
 923                  */
 924                 if (iwl_mvm_tid_queued(tid_data))
 925                         continue;
 926
 927                 if (tid_data->state != IWL_AGG_OFF)
 928                         continue;
 929
 930                 available_tids |= BIT(tid);
 931         }
 932         spin_unlock_bh(&mvmsta->lock);
 933
 934         /*
 935          * disallow protocol offloading if we have no available tid
 936          * (with no pending frames and no active aggregation,
 937          * as we don't handle "holes" properly - the scheduler needs the
 938          * frame's seq number and TFD index to match)
 939          */
 940         if (!available_tids)
 941                 return true;
 942
 943         /* for simplicity, just use the first available tid */
 944         iter_data->offloading_tid = ffs(available_tids) - 1;
 945         return false;
 946 }
 947
 948 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 949                                         struct ieee80211_vif *vif)
 950 {
 951         struct iwl_d0i3_iter_data *data = _data;
 952         struct iwl_mvm *mvm = data->mvm;
 953         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 954         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 955
 956         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 957         if (vif->type != NL80211_IFTYPE_STATION ||
 958             !vif->bss_conf.assoc)
 959                 return;
 960
 961         /*
 962          * in case of pending tx packets or active aggregations,
 963          * avoid offloading features in order to prevent reuse of
 964          * the same qos seq counters.
 965          */
 966         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 967                 data->disable_offloading = true;
 968
 969         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 970         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 971
 972         /*
 973          * on init/association, mvm already configures POWER_TABLE_CMD
 974          * and REPLY_MCAST_FILTER_CMD, so currently don't
 975          * reconfigure them (we might want to use different
 976          * params later on, though).
 977          */
 978         data->ap_sta_id = mvmvif->ap_sta_id;
 979         data->vif_count++;
 980 }
 981
 982 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
 983                                     struct iwl_wowlan_config_cmd_v3 *cmd,
 984                                     struct iwl_d0i3_iter_data *iter_data)
 985 {
 986         struct ieee80211_sta *ap_sta;
 987         struct iwl_mvm_sta *mvm_ap_sta;
 988
 989         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
 990                 return;
 991
 992         rcu_read_lock();
 993
 994         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
 995         if (IS_ERR_OR_NULL(ap_sta))
 996                 goto out;
 997
 998         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 999         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
1000         cmd->offloading_tid = iter_data->offloading_tid;
1001
1002         /*
1003          * The d0i3 uCode takes care of the nonqos counters,
1004          * so configure only the qos seq ones.
1005          */
1006         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
1007 out:
1008         rcu_read_unlock();
1009 }
1010 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1011 {
1012         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1013         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1014         int ret;
1015         struct iwl_d0i3_iter_data d0i3_iter_data = {
1016                 .mvm = mvm,
1017         };
1018         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1019                 .common = {
1020                         .wakeup_filter =
1021                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1022                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
1023                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1024                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1025                 },
1026         };
1027         struct iwl_d3_manager_config d3_cfg_cmd = {
1028                 .min_sleep_time = cpu_to_le32(1000),
1029         };
1030
1031         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1032
1033         /* make sure we have no running tx while configuring the qos */
1034         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1035         synchronize_net();
1036
1037         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1038                                                    IEEE80211_IFACE_ITER_NORMAL,
1039                                                    iwl_mvm_enter_d0i3_iterator,
1040                                                    &d0i3_iter_data);
1041         if (d0i3_iter_data.vif_count == 1) {
1042                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1043                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1044         } else {
1045                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1046                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1047                 mvm->d0i3_offloading = false;
1048         }
1049
1050         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1051         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1052                                    sizeof(wowlan_config_cmd),
1053                                    &wowlan_config_cmd);
1054         if (ret)
1055                 return ret;
1056
1057         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1058                                     flags | CMD_MAKE_TRANS_IDLE,
1059                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1060 }
1061
1062 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1063                                        struct ieee80211_vif *vif)
1064 {
1065         struct iwl_mvm *mvm = _data;
1066         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1067
1068         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1069         if (vif->type != NL80211_IFTYPE_STATION ||
1070             !vif->bss_conf.assoc)
1071                 return;
1072
1073         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1074 }
1075
1076 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1077                                          struct ieee80211_vif *vif)
1078 {
1079         struct iwl_mvm *mvm = data;
1080         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1081
1082         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1083             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1084                 ieee80211_connection_loss(vif);
1085 }
1086
1087 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1088 {
1089         struct ieee80211_sta *sta = NULL;
1090         struct iwl_mvm_sta *mvm_ap_sta;
1091         int i;
1092         bool wake_queues = false;
1093
1094         lockdep_assert_held(&mvm->mutex);
1095
1096         spin_lock_bh(&mvm->d0i3_tx_lock);
1097
1098         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1099                 goto out;
1100
1101         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1102
1103         /* get the sta in order to update seq numbers and re-enqueue skbs */
1104         sta = rcu_dereference_protected(
1105                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1106                         lockdep_is_held(&mvm->mutex));
1107
1108         if (IS_ERR_OR_NULL(sta)) {
1109                 sta = NULL;
1110                 goto out;
1111         }
1112
1113         if (mvm->d0i3_offloading && qos_seq) {
1114                 /* update qos seq numbers if offloading was enabled */
1115                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1116                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1117                         u16 seq = le16_to_cpu(qos_seq[i]);
1118                         /* firmware stores last-used one, we store next one */
1119                         seq += 0x10;
1120                         mvm_ap_sta->tid_data[i].seq_number = seq;
1121                 }
1122         }
1123 out:
1124         /* re-enqueue (or drop) all packets */
1125         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1126                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1127
1128                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1129                         ieee80211_free_txskb(mvm->hw, skb);
1130
1131                 /* if the skb_queue is not empty, we need to wake queues */
1132                 wake_queues = true;
1133         }
1134         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1135         wake_up(&mvm->d0i3_exit_waitq);
1136         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1137         if (wake_queues)
1138                 ieee80211_wake_queues(mvm->hw);
1139
1140         spin_unlock_bh(&mvm->d0i3_tx_lock);
1141 }
1142
1143 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1144 {
1145         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1146         struct iwl_host_cmd get_status_cmd = {
1147                 .id = WOWLAN_GET_STATUSES,
1148                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1149         };
1150         struct iwl_wowlan_status *status;
1151         int ret;
1152         u32 disconnection_reasons, wakeup_reasons;
1153         __le16 *qos_seq = NULL;
1154
1155         mutex_lock(&mvm->mutex);
1156         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1157         if (ret)
1158                 goto out;
1159
1160         if (!get_status_cmd.resp_pkt)
1161                 goto out;
1162
1163         status = (void *)get_status_cmd.resp_pkt->data;
1164         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1165         qos_seq = status->qos_seq_ctr;
1166
1167         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1168
1169         disconnection_reasons =
1170                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1171                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1172         if (wakeup_reasons & disconnection_reasons)
1173                 ieee80211_iterate_active_interfaces(
1174                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1175                         iwl_mvm_d0i3_disconnect_iter, mvm);
1176
1177         iwl_free_resp(&get_status_cmd);
1178 out:
1179         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1180         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1181         mutex_unlock(&mvm->mutex);
1182 }
1183
1184 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1185 {
1186         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1187                     CMD_WAKE_UP_TRANS;
1188         int ret;
1189
1190         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1191
1192         mutex_lock(&mvm->d0i3_suspend_mutex);
1193         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1194                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1195                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1196                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1197                 return 0;
1198         }
1199         mutex_unlock(&mvm->d0i3_suspend_mutex);
1200
1201         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1202         if (ret)
1203                 goto out;
1204
1205         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1206                                                    IEEE80211_IFACE_ITER_NORMAL,
1207                                                    iwl_mvm_exit_d0i3_iterator,
1208                                                    mvm);
1209 out:
1210         schedule_work(&mvm->d0i3_exit_work);
1211         return ret;
1212 }
1213
1214 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1215 {
1216         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1217
1218         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1219         return _iwl_mvm_exit_d0i3(mvm);
1220 }
1221
1222 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1223                              struct napi_struct *napi,
1224                              struct net_device *napi_dev,
1225                              int (*poll)(struct napi_struct *, int),
1226                              int weight)
1227 {
1228         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1229
1230         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1231 }
1232
1233 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1234         .start = iwl_op_mode_mvm_start,
1235         .stop = iwl_op_mode_mvm_stop,
1236         .rx = iwl_mvm_rx_dispatch,
1237         .queue_full = iwl_mvm_stop_sw_queue,
1238         .queue_not_full = iwl_mvm_wake_sw_queue,
1239         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1240         .free_skb = iwl_mvm_free_skb,
1241         .nic_error = iwl_mvm_nic_error,
1242         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1243         .nic_config = iwl_mvm_nic_config,
1244         .enter_d0i3 = iwl_mvm_enter_d0i3,
1245         .exit_d0i3 = iwl_mvm_exit_d0i3,
1246         .napi_add = iwl_mvm_napi_add,
1247 };