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
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
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  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  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,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  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(REPLY_THERMAL_MNG_BACKOFF),
 336         CMD(MAC_PM_POWER_TABLE),
 337         CMD(BT_COEX_CI),
 338         CMD(BT_COEX_UPDATE_SW_BOOST),
 339         CMD(BT_COEX_UPDATE_CORUN_LUT),
 340         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 341         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 342         CMD(ANTENNA_COUPLING_NOTIFICATION),
 343 };
 344 #undef CMD
 345
 346 /* this forward declaration can avoid to export the function */
 347 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 348 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 349
 350 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 351 {
 352         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 353
 354         if (!pwr_tx_backoff)
 355                 return 0;
 356
 357         while (pwr_tx_backoff->pwr) {
 358                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 359                         return pwr_tx_backoff->backoff;
 360
 361                 pwr_tx_backoff++;
 362         }
 363
 364         return 0;
 365 }
 366
 367 static struct iwl_op_mode *
 368 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 369                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 370 {
 371         struct ieee80211_hw *hw;
 372         struct iwl_op_mode *op_mode;
 373         struct iwl_mvm *mvm;
 374         struct iwl_trans_config trans_cfg = {};
 375         static const u8 no_reclaim_cmds[] = {
 376                 TX_CMD,
 377         };
 378         int err, scan_size;
 379         u32 min_backoff;
 380
 381         /*
 382          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 383          * index all over the driver - check that its value corresponds to the
 384          * array size.
 385          */
 386         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 387
 388         /********************************
 389          * 1. Allocating and configuring HW data
 390          ********************************/
 391         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 392                                 sizeof(struct iwl_mvm),
 393                                 &iwl_mvm_hw_ops);
 394         if (!hw)
 395                 return NULL;
 396
 397         if (cfg->max_rx_agg_size)
 398                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 399
 400         op_mode = hw->priv;
 401         op_mode->ops = &iwl_mvm_ops;
 402
 403         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 404         mvm->dev = trans->dev;
 405         mvm->trans = trans;
 406         mvm->cfg = cfg;
 407         mvm->fw = fw;
 408         mvm->hw = hw;
 409
 410         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 411
 412         mvm->aux_queue = 15;
 413         mvm->first_agg_queue = 16;
 414         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 415         if (mvm->cfg->base_params->num_of_queues == 16) {
 416                 mvm->aux_queue = 11;
 417                 mvm->first_agg_queue = 12;
 418         }
 419         mvm->sf_state = SF_UNINIT;
 420         mvm->low_latency_agg_frame_limit = 1;
 421
 422         mutex_init(&mvm->mutex);
 423         mutex_init(&mvm->d0i3_suspend_mutex);
 424         spin_lock_init(&mvm->async_handlers_lock);
 425         INIT_LIST_HEAD(&mvm->time_event_list);
 426         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 427         INIT_LIST_HEAD(&mvm->async_handlers_list);
 428         spin_lock_init(&mvm->time_event_lock);
 429
 430         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 431         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 432         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 433         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 434
 435         spin_lock_init(&mvm->d0i3_tx_lock);
 436         spin_lock_init(&mvm->refs_lock);
 437         skb_queue_head_init(&mvm->d0i3_tx);
 438         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 439
 440         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 441
 442         /*
 443          * Populate the state variables that the transport layer needs
 444          * to know about.
 445          */
 446         trans_cfg.op_mode = op_mode;
 447         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 448         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 449         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 450
 451         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 452                 trans_cfg.bc_table_dword = true;
 453
 454         if (!iwlwifi_mod_params.wd_disable)
 455                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 456         else
 457                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 458
 459         trans_cfg.command_names = iwl_mvm_cmd_strings;
 460
 461         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 462         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 463
 464         snprintf(mvm->hw->wiphy->fw_version,
 465                  sizeof(mvm->hw->wiphy->fw_version),
 466                  "%s", fw->fw_version);
 467
 468         /* Configure transport layer */
 469         iwl_trans_configure(mvm->trans, &trans_cfg);
 470
 471         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 472         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 473
 474         /* set up notification wait support */
 475         iwl_notification_wait_init(&mvm->notif_wait);
 476
 477         /* Init phy db */
 478         mvm->phy_db = iwl_phy_db_init(trans);
 479         if (!mvm->phy_db) {
 480                 IWL_ERR(mvm, "Cannot init phy_db\n");
 481                 goto out_free;
 482         }
 483
 484         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 485                  mvm->cfg->name, mvm->trans->hw_rev);
 486
 487         min_backoff = calc_min_backoff(trans, cfg);
 488         iwl_mvm_tt_initialize(mvm, min_backoff);
 489         /* set the nvm_file_name according to priority */
 490         if (iwlwifi_mod_params.nvm_file)
 491                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 492         else
 493                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 494
 495         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 496                  "not allowing power-up and not having nvm_file\n"))
 497                 goto out_free;
 498
 499         /*
 500          * Even if nvm exists in the nvm_file driver should read again the nvm
 501          * from the nic because there might be entries that exist in the OTP
 502          * and not in the file.
 503          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 504          */
 505         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 506                 err = iwl_nvm_init(mvm, false);
 507                 if (err)
 508                         goto out_free;
 509         } else {
 510                 err = iwl_trans_start_hw(mvm->trans);
 511                 if (err)
 512                         goto out_free;
 513
 514                 mutex_lock(&mvm->mutex);
 515                 err = iwl_run_init_mvm_ucode(mvm, true);
 516                 iwl_trans_stop_device(trans);
 517                 mutex_unlock(&mvm->mutex);
 518                 /* returns 0 if successful, 1 if success but in rfkill */
 519                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 520                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 521                         goto out_free;
 522                 }
 523         }
 524
 525         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 526                 scan_size = sizeof(struct iwl_scan_req_unified_lmac) +
 527                         sizeof(struct iwl_scan_channel_cfg_lmac) *
 528                                 mvm->fw->ucode_capa.n_scan_channels +
 529                         sizeof(struct iwl_scan_probe_req);
 530         else
 531                 scan_size = sizeof(struct iwl_scan_cmd) +
 532                         mvm->fw->ucode_capa.max_probe_length +
 533                         mvm->fw->ucode_capa.n_scan_channels *
 534                                 sizeof(struct iwl_scan_channel);
 535
 536         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 537         if (!mvm->scan_cmd)
 538                 goto out_free;
 539
 540         err = iwl_mvm_mac_setup_register(mvm);
 541         if (err)
 542                 goto out_free;
 543
 544         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 545         if (err)
 546                 goto out_unregister;
 547
 548         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 549
 550         /* rpm starts with a taken ref. only set the appropriate bit here. */
 551         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 552
 553         return op_mode;
 554
 555  out_unregister:
 556         ieee80211_unregister_hw(mvm->hw);
 557         iwl_mvm_leds_exit(mvm);
 558  out_free:
 559         iwl_phy_db_free(mvm->phy_db);
 560         kfree(mvm->scan_cmd);
 561         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 562                 iwl_trans_op_mode_leave(trans);
 563         ieee80211_free_hw(mvm->hw);
 564         return NULL;
 565 }
 566
 567 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 568 {
 569         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 570         int i;
 571
 572         iwl_mvm_leds_exit(mvm);
 573
 574         iwl_mvm_tt_exit(mvm);
 575
 576         ieee80211_unregister_hw(mvm->hw);
 577
 578         kfree(mvm->scan_cmd);
 579         if (mvm->fw_error_dump) {
 580                 vfree(mvm->fw_error_dump->op_mode_ptr);
 581                 vfree(mvm->fw_error_dump->trans_ptr);
 582                 kfree(mvm->fw_error_dump);
 583         }
 584         kfree(mvm->mcast_filter_cmd);
 585         mvm->mcast_filter_cmd = NULL;
 586
 587 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 588         kfree(mvm->d3_resume_sram);
 589 #endif
 590
 591         iwl_trans_op_mode_leave(mvm->trans);
 592
 593         iwl_phy_db_free(mvm->phy_db);
 594         mvm->phy_db = NULL;
 595
 596         iwl_free_nvm_data(mvm->nvm_data);
 597         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 598                 kfree(mvm->nvm_sections[i].data);
 599
 600         ieee80211_free_hw(mvm->hw);
 601 }
 602
 603 struct iwl_async_handler_entry {
 604         struct list_head list;
 605         struct iwl_rx_cmd_buffer rxb;
 606         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 607                   struct iwl_device_cmd *cmd);
 608 };
 609
 610 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 611 {
 612         struct iwl_async_handler_entry *entry, *tmp;
 613
 614         spin_lock_bh(&mvm->async_handlers_lock);
 615         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 616                 iwl_free_rxb(&entry->rxb);
 617                 list_del(&entry->list);
 618                 kfree(entry);
 619         }
 620         spin_unlock_bh(&mvm->async_handlers_lock);
 621 }
 622
 623 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 624 {
 625         struct iwl_mvm *mvm =
 626                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 627         struct iwl_async_handler_entry *entry, *tmp;
 628         struct list_head local_list;
 629
 630         INIT_LIST_HEAD(&local_list);
 631
 632         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 633         mutex_lock(&mvm->mutex);
 634
 635         /*
 636          * Sync with Rx path with a lock. Remove all the entries from this list,
 637          * add them to a local one (lock free), and then handle them.
 638          */
 639         spin_lock_bh(&mvm->async_handlers_lock);
 640         list_splice_init(&mvm->async_handlers_list, &local_list);
 641         spin_unlock_bh(&mvm->async_handlers_lock);
 642
 643         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 644                 if (entry->fn(mvm, &entry->rxb, NULL))
 645                         IWL_WARN(mvm,
 646                                  "returned value from ASYNC handlers are ignored\n");
 647                 iwl_free_rxb(&entry->rxb);
 648                 list_del(&entry->list);
 649                 kfree(entry);
 650         }
 651         mutex_unlock(&mvm->mutex);
 652 }
 653
 654 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 655                                struct iwl_rx_cmd_buffer *rxb,
 656                                struct iwl_device_cmd *cmd)
 657 {
 658         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 659         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 660         u8 i;
 661
 662         /*
 663          * Do the notification wait before RX handlers so
 664          * even if the RX handler consumes the RXB we have
 665          * access to it in the notification wait entry.
 666          */
 667         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 668
 669         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 670                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 671                 struct iwl_async_handler_entry *entry;
 672
 673                 if (rx_h->cmd_id != pkt->hdr.cmd)
 674                         continue;
 675
 676                 if (!rx_h->async)
 677                         return rx_h->fn(mvm, rxb, cmd);
 678
 679                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 680                 /* we can't do much... */
 681                 if (!entry)
 682                         return 0;
 683
 684                 entry->rxb._page = rxb_steal_page(rxb);
 685                 entry->rxb._offset = rxb->_offset;
 686                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 687                 entry->fn = rx_h->fn;
 688                 spin_lock(&mvm->async_handlers_lock);
 689                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 690                 spin_unlock(&mvm->async_handlers_lock);
 691                 schedule_work(&mvm->async_handlers_wk);
 692                 break;
 693         }
 694
 695         return 0;
 696 }
 697
 698 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 699 {
 700         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 701         int mq = mvm->queue_to_mac80211[queue];
 702
 703         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 704                 return;
 705
 706         if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
 707                 IWL_DEBUG_TX_QUEUES(mvm,
 708                                     "queue %d (mac80211 %d) already stopped\n",
 709                                     queue, mq);
 710                 return;
 711         }
 712
 713         set_bit(mq, &mvm->transport_queue_stop);
 714         ieee80211_stop_queue(mvm->hw, mq);
 715 }
 716
 717 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 718 {
 719         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 720         int mq = mvm->queue_to_mac80211[queue];
 721
 722         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 723                 return;
 724
 725         if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
 726                 IWL_DEBUG_TX_QUEUES(mvm,
 727                                     "queue %d (mac80211 %d) already awake\n",
 728                                     queue, mq);
 729                 return;
 730         }
 731
 732         clear_bit(mq, &mvm->transport_queue_stop);
 733
 734         ieee80211_wake_queue(mvm->hw, mq);
 735 }
 736
 737 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 738 {
 739         if (state)
 740                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 741         else
 742                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 743
 744         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 745 }
 746
 747 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 748 {
 749         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 750
 751         if (state)
 752                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 753         else
 754                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 755
 756         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 757
 758         return state && mvm->cur_ucode != IWL_UCODE_INIT;
 759 }
 760
 761 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 762 {
 763         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 764         struct ieee80211_tx_info *info;
 765
 766         info = IEEE80211_SKB_CB(skb);
 767         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 768         ieee80211_free_txskb(mvm->hw, skb);
 769 }
 770
 771 struct iwl_mvm_reprobe {
 772         struct device *dev;
 773         struct work_struct work;
 774 };
 775
 776 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 777 {
 778         struct iwl_mvm_reprobe *reprobe;
 779
 780         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 781         if (device_reprobe(reprobe->dev))
 782                 dev_err(reprobe->dev, "reprobe failed!\n");
 783         kfree(reprobe);
 784         module_put(THIS_MODULE);
 785 }
 786
 787 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 788 {
 789         iwl_abort_notification_waits(&mvm->notif_wait);
 790
 791         /*
 792          * This is a bit racy, but worst case we tell mac80211 about
 793          * a stopped/aborted scan when that was already done which
 794          * is not a problem. It is necessary to abort any os scan
 795          * here because mac80211 requires having the scan cleared
 796          * before restarting.
 797          * We'll reset the scan_status to NONE in restart cleanup in
 798          * the next start() call from mac80211. If restart isn't called
 799          * (no fw restart) scan status will stay busy.
 800          */
 801         switch (mvm->scan_status) {
 802         case IWL_MVM_SCAN_NONE:
 803                 break;
 804         case IWL_MVM_SCAN_OS:
 805                 ieee80211_scan_completed(mvm->hw, true);
 806                 break;
 807         case IWL_MVM_SCAN_SCHED:
 808                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 809                 if (!mvm->restart_fw)
 810                         ieee80211_sched_scan_stopped(mvm->hw);
 811                 break;
 812         }
 813
 814         /*
 815          * If we're restarting already, don't cycle restarts.
 816          * If INIT fw asserted, it will likely fail again.
 817          * If WoWLAN fw asserted, don't restart either, mac80211
 818          * can't recover this since we're already half suspended.
 819          */
 820         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 821                 struct iwl_mvm_reprobe *reprobe;
 822
 823                 IWL_ERR(mvm,
 824                         "Firmware error during reconfiguration - reprobe!\n");
 825
 826                 /*
 827                  * get a module reference to avoid doing this while unloading
 828                  * anyway and to avoid scheduling a work with code that's
 829                  * being removed.
 830                  */
 831                 if (!try_module_get(THIS_MODULE)) {
 832                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 833                         return;
 834                 }
 835
 836                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 837                 if (!reprobe) {
 838                         module_put(THIS_MODULE);
 839                         return;
 840                 }
 841                 reprobe->dev = mvm->trans->dev;
 842                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 843                 schedule_work(&reprobe->work);
 844         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
 845                    (!fw_error || mvm->restart_fw)) {
 846                 /* don't let the transport/FW power down */
 847                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 848
 849                 if (fw_error && mvm->restart_fw > 0)
 850                         mvm->restart_fw--;
 851                 ieee80211_restart_hw(mvm->hw);
 852         }
 853 }
 854
 855 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 856 {
 857         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 858
 859         iwl_mvm_dump_nic_error_log(mvm);
 860
 861         iwl_mvm_nic_restart(mvm, true);
 862 }
 863
 864 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 865 {
 866         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 867
 868         WARN_ON(1);
 869         iwl_mvm_nic_restart(mvm, true);
 870 }
 871
 872 struct iwl_d0i3_iter_data {
 873         struct iwl_mvm *mvm;
 874         u8 ap_sta_id;
 875         u8 vif_count;
 876         u8 offloading_tid;
 877         bool disable_offloading;
 878 };
 879
 880 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 881                                         struct ieee80211_vif *vif,
 882                                         struct iwl_d0i3_iter_data *iter_data)
 883 {
 884         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 885         struct ieee80211_sta *ap_sta;
 886         struct iwl_mvm_sta *mvmsta;
 887         u32 available_tids = 0;
 888         u8 tid;
 889
 890         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 891                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 892                 return false;
 893
 894         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 895         if (IS_ERR_OR_NULL(ap_sta))
 896                 return false;
 897
 898         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 899         spin_lock_bh(&mvmsta->lock);
 900         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 901                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 902
 903                 /*
 904                  * in case of pending tx packets, don't use this tid
 905                  * for offloading in order to prevent reuse of the same
 906                  * qos seq counters.
 907                  */
 908                 if (iwl_mvm_tid_queued(tid_data))
 909                         continue;
 910
 911                 if (tid_data->state != IWL_AGG_OFF)
 912                         continue;
 913
 914                 available_tids |= BIT(tid);
 915         }
 916         spin_unlock_bh(&mvmsta->lock);
 917
 918         /*
 919          * disallow protocol offloading if we have no available tid
 920          * (with no pending frames and no active aggregation,
 921          * as we don't handle "holes" properly - the scheduler needs the
 922          * frame's seq number and TFD index to match)
 923          */
 924         if (!available_tids)
 925                 return true;
 926
 927         /* for simplicity, just use the first available tid */
 928         iter_data->offloading_tid = ffs(available_tids) - 1;
 929         return false;
 930 }
 931
 932 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 933                                         struct ieee80211_vif *vif)
 934 {
 935         struct iwl_d0i3_iter_data *data = _data;
 936         struct iwl_mvm *mvm = data->mvm;
 937         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 938         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 939
 940         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 941         if (vif->type != NL80211_IFTYPE_STATION ||
 942             !vif->bss_conf.assoc)
 943                 return;
 944
 945         /*
 946          * in case of pending tx packets or active aggregations,
 947          * avoid offloading features in order to prevent reuse of
 948          * the same qos seq counters.
 949          */
 950         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 951                 data->disable_offloading = true;
 952
 953         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 954         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 955
 956         /*
 957          * on init/association, mvm already configures POWER_TABLE_CMD
 958          * and REPLY_MCAST_FILTER_CMD, so currently don't
 959          * reconfigure them (we might want to use different
 960          * params later on, though).
 961          */
 962         data->ap_sta_id = mvmvif->ap_sta_id;
 963         data->vif_count++;
 964 }
 965
 966 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
 967                                     struct iwl_wowlan_config_cmd_v3 *cmd,
 968                                     struct iwl_d0i3_iter_data *iter_data)
 969 {
 970         struct ieee80211_sta *ap_sta;
 971         struct iwl_mvm_sta *mvm_ap_sta;
 972
 973         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
 974                 return;
 975
 976         rcu_read_lock();
 977
 978         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
 979         if (IS_ERR_OR_NULL(ap_sta))
 980                 goto out;
 981
 982         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 983         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
 984         cmd->offloading_tid = iter_data->offloading_tid;
 985
 986         /*
 987          * The d0i3 uCode takes care of the nonqos counters,
 988          * so configure only the qos seq ones.
 989          */
 990         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
 991 out:
 992         rcu_read_unlock();
 993 }
 994 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
 995 {
 996         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 997         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 998         int ret;
 999         struct iwl_d0i3_iter_data d0i3_iter_data = {
1000                 .mvm = mvm,
1001         };
1002         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1003                 .common = {
1004                         .wakeup_filter =
1005                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1006                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
1007                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1008                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1009                 },
1010         };
1011         struct iwl_d3_manager_config d3_cfg_cmd = {
1012                 .min_sleep_time = cpu_to_le32(1000),
1013         };
1014
1015         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1016
1017         /* make sure we have no running tx while configuring the qos */
1018         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1019         synchronize_net();
1020
1021         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1022                                                    IEEE80211_IFACE_ITER_NORMAL,
1023                                                    iwl_mvm_enter_d0i3_iterator,
1024                                                    &d0i3_iter_data);
1025         if (d0i3_iter_data.vif_count == 1) {
1026                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1027                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1028         } else {
1029                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1030                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1031                 mvm->d0i3_offloading = false;
1032         }
1033
1034         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1035         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1036                                    sizeof(wowlan_config_cmd),
1037                                    &wowlan_config_cmd);
1038         if (ret)
1039                 return ret;
1040
1041         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1042                                     flags | CMD_MAKE_TRANS_IDLE,
1043                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1044 }
1045
1046 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1047                                        struct ieee80211_vif *vif)
1048 {
1049         struct iwl_mvm *mvm = _data;
1050         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1051
1052         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1053         if (vif->type != NL80211_IFTYPE_STATION ||
1054             !vif->bss_conf.assoc)
1055                 return;
1056
1057         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1058 }
1059
1060 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1061                                          struct ieee80211_vif *vif)
1062 {
1063         struct iwl_mvm *mvm = data;
1064         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1065
1066         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1067             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1068                 ieee80211_connection_loss(vif);
1069 }
1070
1071 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1072 {
1073         struct ieee80211_sta *sta = NULL;
1074         struct iwl_mvm_sta *mvm_ap_sta;
1075         int i;
1076         bool wake_queues = false;
1077
1078         lockdep_assert_held(&mvm->mutex);
1079
1080         spin_lock_bh(&mvm->d0i3_tx_lock);
1081
1082         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1083                 goto out;
1084
1085         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1086
1087         /* get the sta in order to update seq numbers and re-enqueue skbs */
1088         sta = rcu_dereference_protected(
1089                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1090                         lockdep_is_held(&mvm->mutex));
1091
1092         if (IS_ERR_OR_NULL(sta)) {
1093                 sta = NULL;
1094                 goto out;
1095         }
1096
1097         if (mvm->d0i3_offloading && qos_seq) {
1098                 /* update qos seq numbers if offloading was enabled */
1099                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1100                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1101                         u16 seq = le16_to_cpu(qos_seq[i]);
1102                         /* firmware stores last-used one, we store next one */
1103                         seq += 0x10;
1104                         mvm_ap_sta->tid_data[i].seq_number = seq;
1105                 }
1106         }
1107 out:
1108         /* re-enqueue (or drop) all packets */
1109         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1110                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1111
1112                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1113                         ieee80211_free_txskb(mvm->hw, skb);
1114
1115                 /* if the skb_queue is not empty, we need to wake queues */
1116                 wake_queues = true;
1117         }
1118         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1119         wake_up(&mvm->d0i3_exit_waitq);
1120         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1121         if (wake_queues)
1122                 ieee80211_wake_queues(mvm->hw);
1123
1124         spin_unlock_bh(&mvm->d0i3_tx_lock);
1125 }
1126
1127 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1128 {
1129         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1130         struct iwl_host_cmd get_status_cmd = {
1131                 .id = WOWLAN_GET_STATUSES,
1132                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1133         };
1134         struct iwl_wowlan_status *status;
1135         int ret;
1136         u32 disconnection_reasons, wakeup_reasons;
1137         __le16 *qos_seq = NULL;
1138
1139         mutex_lock(&mvm->mutex);
1140         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1141         if (ret)
1142                 goto out;
1143
1144         if (!get_status_cmd.resp_pkt)
1145                 goto out;
1146
1147         status = (void *)get_status_cmd.resp_pkt->data;
1148         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1149         qos_seq = status->qos_seq_ctr;
1150
1151         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1152
1153         disconnection_reasons =
1154                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1155                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1156         if (wakeup_reasons & disconnection_reasons)
1157                 ieee80211_iterate_active_interfaces(
1158                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1159                         iwl_mvm_d0i3_disconnect_iter, mvm);
1160
1161         iwl_free_resp(&get_status_cmd);
1162 out:
1163         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1164         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1165         mutex_unlock(&mvm->mutex);
1166 }
1167
1168 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1169 {
1170         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1171                     CMD_WAKE_UP_TRANS;
1172         int ret;
1173
1174         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1175
1176         mutex_lock(&mvm->d0i3_suspend_mutex);
1177         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1178                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1179                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1180                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1181                 return 0;
1182         }
1183         mutex_unlock(&mvm->d0i3_suspend_mutex);
1184
1185         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1186         if (ret)
1187                 goto out;
1188
1189         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1190                                                    IEEE80211_IFACE_ITER_NORMAL,
1191                                                    iwl_mvm_exit_d0i3_iterator,
1192                                                    mvm);
1193 out:
1194         schedule_work(&mvm->d0i3_exit_work);
1195         return ret;
1196 }
1197
1198 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1199 {
1200         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1201
1202         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1203         return _iwl_mvm_exit_d0i3(mvm);
1204 }
1205
1206 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1207                              struct napi_struct *napi,
1208                              struct net_device *napi_dev,
1209                              int (*poll)(struct napi_struct *, int),
1210                              int weight)
1211 {
1212         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1213
1214         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1215 }
1216
1217 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1218         .start = iwl_op_mode_mvm_start,
1219         .stop = iwl_op_mode_mvm_stop,
1220         .rx = iwl_mvm_rx_dispatch,
1221         .queue_full = iwl_mvm_stop_sw_queue,
1222         .queue_not_full = iwl_mvm_wake_sw_queue,
1223         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1224         .free_skb = iwl_mvm_free_skb,
1225         .nic_error = iwl_mvm_nic_error,
1226         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1227         .nic_config = iwl_mvm_nic_config,
1228         .enter_d0i3 = iwl_mvm_enter_d0i3,
1229         .exit_d0i3 = iwl_mvm_exit_d0i3,
1230         .napi_add = iwl_mvm_napi_add,
1231 };