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  *
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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,
  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         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 258
 259 };
 260 #undef RX_HANDLER
 261 #define CMD(x) [x] = #x
 262
 263 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 264         CMD(MVM_ALIVE),
 265         CMD(REPLY_ERROR),
 266         CMD(INIT_COMPLETE_NOTIF),
 267         CMD(PHY_CONTEXT_CMD),
 268         CMD(MGMT_MCAST_KEY),
 269         CMD(TX_CMD),
 270         CMD(TXPATH_FLUSH),
 271         CMD(MAC_CONTEXT_CMD),
 272         CMD(TIME_EVENT_CMD),
 273         CMD(TIME_EVENT_NOTIFICATION),
 274         CMD(BINDING_CONTEXT_CMD),
 275         CMD(TIME_QUOTA_CMD),
 276         CMD(NON_QOS_TX_COUNTER_CMD),
 277         CMD(RADIO_VERSION_NOTIFICATION),
 278         CMD(SCAN_REQUEST_CMD),
 279         CMD(SCAN_ABORT_CMD),
 280         CMD(SCAN_START_NOTIFICATION),
 281         CMD(SCAN_RESULTS_NOTIFICATION),
 282         CMD(SCAN_COMPLETE_NOTIFICATION),
 283         CMD(NVM_ACCESS_CMD),
 284         CMD(PHY_CONFIGURATION_CMD),
 285         CMD(CALIB_RES_NOTIF_PHY_DB),
 286         CMD(SET_CALIB_DEFAULT_CMD),
 287         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 288         CMD(ADD_STA_KEY),
 289         CMD(ADD_STA),
 290         CMD(REMOVE_STA),
 291         CMD(LQ_CMD),
 292         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 293         CMD(MATCH_FOUND_NOTIFICATION),
 294         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 295         CMD(SCAN_OFFLOAD_ABORT_CMD),
 296         CMD(HOT_SPOT_CMD),
 297         CMD(SCAN_OFFLOAD_COMPLETE),
 298         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 299         CMD(SCAN_ITERATION_COMPLETE),
 300         CMD(POWER_TABLE_CMD),
 301         CMD(WEP_KEY),
 302         CMD(REPLY_RX_PHY_CMD),
 303         CMD(REPLY_RX_MPDU_CMD),
 304         CMD(BEACON_NOTIFICATION),
 305         CMD(BEACON_TEMPLATE_CMD),
 306         CMD(STATISTICS_NOTIFICATION),
 307         CMD(EOSP_NOTIFICATION),
 308         CMD(REDUCE_TX_POWER_CMD),
 309         CMD(TX_ANT_CONFIGURATION_CMD),
 310         CMD(D3_CONFIG_CMD),
 311         CMD(D0I3_END_CMD),
 312         CMD(PROT_OFFLOAD_CONFIG_CMD),
 313         CMD(OFFLOADS_QUERY_CMD),
 314         CMD(REMOTE_WAKE_CONFIG_CMD),
 315         CMD(WOWLAN_PATTERNS),
 316         CMD(WOWLAN_CONFIGURATION),
 317         CMD(WOWLAN_TSC_RSC_PARAM),
 318         CMD(WOWLAN_TKIP_PARAM),
 319         CMD(WOWLAN_KEK_KCK_MATERIAL),
 320         CMD(WOWLAN_GET_STATUSES),
 321         CMD(WOWLAN_TX_POWER_PER_DB),
 322         CMD(NET_DETECT_CONFIG_CMD),
 323         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 324         CMD(NET_DETECT_PROFILES_CMD),
 325         CMD(NET_DETECT_HOTSPOTS_CMD),
 326         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 327         CMD(CARD_STATE_NOTIFICATION),
 328         CMD(MISSED_BEACONS_NOTIFICATION),
 329         CMD(BT_COEX_PRIO_TABLE),
 330         CMD(BT_COEX_PROT_ENV),
 331         CMD(BT_PROFILE_NOTIFICATION),
 332         CMD(BT_CONFIG),
 333         CMD(MCAST_FILTER_CMD),
 334         CMD(BCAST_FILTER_CMD),
 335         CMD(REPLY_SF_CFG_CMD),
 336         CMD(REPLY_BEACON_FILTERING_CMD),
 337         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 338         CMD(DTS_MEASUREMENT_NOTIFICATION),
 339         CMD(REPLY_THERMAL_MNG_BACKOFF),
 340         CMD(MAC_PM_POWER_TABLE),
 341         CMD(LTR_CONFIG),
 342         CMD(BT_COEX_CI),
 343         CMD(BT_COEX_UPDATE_SW_BOOST),
 344         CMD(BT_COEX_UPDATE_CORUN_LUT),
 345         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 346         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 347         CMD(ANTENNA_COUPLING_NOTIFICATION),
 348         CMD(SCD_QUEUE_CFG),
 349 };
 350 #undef CMD
 351
 352 /* this forward declaration can avoid to export the function */
 353 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 354 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 355
 356 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 357 {
 358         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 359
 360         if (!pwr_tx_backoff)
 361                 return 0;
 362
 363         while (pwr_tx_backoff->pwr) {
 364                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 365                         return pwr_tx_backoff->backoff;
 366
 367                 pwr_tx_backoff++;
 368         }
 369
 370         return 0;
 371 }
 372
 373 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 374
 375 static struct iwl_op_mode *
 376 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 377                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 378 {
 379         struct ieee80211_hw *hw;
 380         struct iwl_op_mode *op_mode;
 381         struct iwl_mvm *mvm;
 382         struct iwl_trans_config trans_cfg = {};
 383         static const u8 no_reclaim_cmds[] = {
 384                 TX_CMD,
 385         };
 386         int err, scan_size;
 387         u32 min_backoff;
 388
 389         /*
 390          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 391          * index all over the driver - check that its value corresponds to the
 392          * array size.
 393          */
 394         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 395
 396         /********************************
 397          * 1. Allocating and configuring HW data
 398          ********************************/
 399         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 400                                 sizeof(struct iwl_mvm),
 401                                 &iwl_mvm_hw_ops);
 402         if (!hw)
 403                 return NULL;
 404
 405         if (cfg->max_rx_agg_size)
 406                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 407
 408         if (cfg->max_tx_agg_size)
 409                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 410
 411         op_mode = hw->priv;
 412         op_mode->ops = &iwl_mvm_ops;
 413
 414         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 415         mvm->dev = trans->dev;
 416         mvm->trans = trans;
 417         mvm->cfg = cfg;
 418         mvm->fw = fw;
 419         mvm->hw = hw;
 420
 421         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 422
 423         mvm->aux_queue = 15;
 424         mvm->first_agg_queue = 16;
 425         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 426         if (mvm->cfg->base_params->num_of_queues == 16) {
 427                 mvm->aux_queue = 11;
 428                 mvm->first_agg_queue = 12;
 429         }
 430         mvm->sf_state = SF_UNINIT;
 431         mvm->low_latency_agg_frame_limit = 6;
 432         mvm->cur_ucode = IWL_UCODE_INIT;
 433
 434         mutex_init(&mvm->mutex);
 435         mutex_init(&mvm->d0i3_suspend_mutex);
 436         spin_lock_init(&mvm->async_handlers_lock);
 437         INIT_LIST_HEAD(&mvm->time_event_list);
 438         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 439         INIT_LIST_HEAD(&mvm->async_handlers_list);
 440         spin_lock_init(&mvm->time_event_lock);
 441
 442         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 443         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 444         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 445         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 446         INIT_WORK(&mvm->fw_error_dump_wk, iwl_mvm_fw_error_dump_wk);
 447
 448         spin_lock_init(&mvm->d0i3_tx_lock);
 449         spin_lock_init(&mvm->refs_lock);
 450         skb_queue_head_init(&mvm->d0i3_tx);
 451         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 452
 453         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 454
 455         /*
 456          * Populate the state variables that the transport layer needs
 457          * to know about.
 458          */
 459         trans_cfg.op_mode = op_mode;
 460         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 461         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 462         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 463
 464         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 465                 trans_cfg.bc_table_dword = true;
 466
 467         if (!iwlwifi_mod_params.wd_disable)
 468                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 469         else
 470                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 471
 472         trans_cfg.command_names = iwl_mvm_cmd_strings;
 473
 474         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 475         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 476         trans_cfg.scd_set_active = true;
 477
 478         snprintf(mvm->hw->wiphy->fw_version,
 479                  sizeof(mvm->hw->wiphy->fw_version),
 480                  "%s", fw->fw_version);
 481
 482         /* Configure transport layer */
 483         iwl_trans_configure(mvm->trans, &trans_cfg);
 484
 485         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 486         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 487
 488         /* set up notification wait support */
 489         iwl_notification_wait_init(&mvm->notif_wait);
 490
 491         /* Init phy db */
 492         mvm->phy_db = iwl_phy_db_init(trans);
 493         if (!mvm->phy_db) {
 494                 IWL_ERR(mvm, "Cannot init phy_db\n");
 495                 goto out_free;
 496         }
 497
 498         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 499                  mvm->cfg->name, mvm->trans->hw_rev);
 500
 501         min_backoff = calc_min_backoff(trans, cfg);
 502         iwl_mvm_tt_initialize(mvm, min_backoff);
 503         /* set the nvm_file_name according to priority */
 504         if (iwlwifi_mod_params.nvm_file)
 505                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 506         else
 507                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 508
 509         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 510                  "not allowing power-up and not having nvm_file\n"))
 511                 goto out_free;
 512
 513         /*
 514          * Even if nvm exists in the nvm_file driver should read again the nvm
 515          * from the nic because there might be entries that exist in the OTP
 516          * and not in the file.
 517          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 518          */
 519         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 520                 err = iwl_nvm_init(mvm, false);
 521                 if (err)
 522                         goto out_free;
 523         } else {
 524                 err = iwl_trans_start_hw(mvm->trans);
 525                 if (err)
 526                         goto out_free;
 527
 528                 mutex_lock(&mvm->mutex);
 529                 err = iwl_run_init_mvm_ucode(mvm, true);
 530                 if (!err || !iwlmvm_mod_params.init_dbg)
 531                         iwl_trans_stop_device(trans);
 532                 mutex_unlock(&mvm->mutex);
 533                 /* returns 0 if successful, 1 if success but in rfkill */
 534                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 535                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 536                         goto out_free;
 537                 }
 538         }
 539
 540         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 541                 scan_size = sizeof(struct iwl_scan_req_unified_lmac) +
 542                         sizeof(struct iwl_scan_channel_cfg_lmac) *
 543                                 mvm->fw->ucode_capa.n_scan_channels +
 544                         sizeof(struct iwl_scan_probe_req);
 545         else
 546                 scan_size = sizeof(struct iwl_scan_cmd) +
 547                         mvm->fw->ucode_capa.max_probe_length +
 548                         mvm->fw->ucode_capa.n_scan_channels *
 549                                 sizeof(struct iwl_scan_channel);
 550
 551         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 552         if (!mvm->scan_cmd)
 553                 goto out_free;
 554
 555         err = iwl_mvm_mac_setup_register(mvm);
 556         if (err)
 557                 goto out_free;
 558
 559         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 560         if (err)
 561                 goto out_unregister;
 562
 563         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 564
 565         /* rpm starts with a taken ref. only set the appropriate bit here. */
 566         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 567
 568         return op_mode;
 569
 570  out_unregister:
 571         ieee80211_unregister_hw(mvm->hw);
 572         iwl_mvm_leds_exit(mvm);
 573  out_free:
 574         iwl_phy_db_free(mvm->phy_db);
 575         kfree(mvm->scan_cmd);
 576         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 577                 iwl_trans_op_mode_leave(trans);
 578         ieee80211_free_hw(mvm->hw);
 579         return NULL;
 580 }
 581
 582 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 583 {
 584         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 585         int i;
 586
 587         iwl_mvm_leds_exit(mvm);
 588
 589         iwl_mvm_tt_exit(mvm);
 590
 591         ieee80211_unregister_hw(mvm->hw);
 592
 593         kfree(mvm->scan_cmd);
 594         kfree(mvm->mcast_filter_cmd);
 595         mvm->mcast_filter_cmd = NULL;
 596
 597 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 598         kfree(mvm->d3_resume_sram);
 599         if (mvm->nd_config) {
 600                 kfree(mvm->nd_config->match_sets);
 601                 kfree(mvm->nd_config);
 602                 mvm->nd_config = NULL;
 603                 kfree(mvm->nd_ies);
 604                 mvm->nd_ies = NULL;
 605         }
 606 #endif
 607
 608         iwl_trans_op_mode_leave(mvm->trans);
 609
 610         iwl_phy_db_free(mvm->phy_db);
 611         mvm->phy_db = NULL;
 612
 613         iwl_free_nvm_data(mvm->nvm_data);
 614         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 615                 kfree(mvm->nvm_sections[i].data);
 616
 617         ieee80211_free_hw(mvm->hw);
 618 }
 619
 620 struct iwl_async_handler_entry {
 621         struct list_head list;
 622         struct iwl_rx_cmd_buffer rxb;
 623         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 624                   struct iwl_device_cmd *cmd);
 625 };
 626
 627 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 628 {
 629         struct iwl_async_handler_entry *entry, *tmp;
 630
 631         spin_lock_bh(&mvm->async_handlers_lock);
 632         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 633                 iwl_free_rxb(&entry->rxb);
 634                 list_del(&entry->list);
 635                 kfree(entry);
 636         }
 637         spin_unlock_bh(&mvm->async_handlers_lock);
 638 }
 639
 640 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 641 {
 642         struct iwl_mvm *mvm =
 643                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 644         struct iwl_async_handler_entry *entry, *tmp;
 645         struct list_head local_list;
 646
 647         INIT_LIST_HEAD(&local_list);
 648
 649         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 650         mutex_lock(&mvm->mutex);
 651
 652         /*
 653          * Sync with Rx path with a lock. Remove all the entries from this list,
 654          * add them to a local one (lock free), and then handle them.
 655          */
 656         spin_lock_bh(&mvm->async_handlers_lock);
 657         list_splice_init(&mvm->async_handlers_list, &local_list);
 658         spin_unlock_bh(&mvm->async_handlers_lock);
 659
 660         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 661                 if (entry->fn(mvm, &entry->rxb, NULL))
 662                         IWL_WARN(mvm,
 663                                  "returned value from ASYNC handlers are ignored\n");
 664                 iwl_free_rxb(&entry->rxb);
 665                 list_del(&entry->list);
 666                 kfree(entry);
 667         }
 668         mutex_unlock(&mvm->mutex);
 669 }
 670
 671 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 672                                struct iwl_rx_cmd_buffer *rxb,
 673                                struct iwl_device_cmd *cmd)
 674 {
 675         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 676         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 677         u8 i;
 678
 679         /*
 680          * Do the notification wait before RX handlers so
 681          * even if the RX handler consumes the RXB we have
 682          * access to it in the notification wait entry.
 683          */
 684         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 685
 686         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 687                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 688                 struct iwl_async_handler_entry *entry;
 689
 690                 if (rx_h->cmd_id != pkt->hdr.cmd)
 691                         continue;
 692
 693                 if (!rx_h->async)
 694                         return rx_h->fn(mvm, rxb, cmd);
 695
 696                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 697                 /* we can't do much... */
 698                 if (!entry)
 699                         return 0;
 700
 701                 entry->rxb._page = rxb_steal_page(rxb);
 702                 entry->rxb._offset = rxb->_offset;
 703                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 704                 entry->fn = rx_h->fn;
 705                 spin_lock(&mvm->async_handlers_lock);
 706                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 707                 spin_unlock(&mvm->async_handlers_lock);
 708                 schedule_work(&mvm->async_handlers_wk);
 709                 break;
 710         }
 711
 712         return 0;
 713 }
 714
 715 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 716 {
 717         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 718         int mq = mvm->queue_to_mac80211[queue];
 719
 720         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 721                 return;
 722
 723         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 724                 IWL_DEBUG_TX_QUEUES(mvm,
 725                                     "queue %d (mac80211 %d) already stopped\n",
 726                                     queue, mq);
 727                 return;
 728         }
 729
 730         ieee80211_stop_queue(mvm->hw, mq);
 731 }
 732
 733 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 734 {
 735         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 736         int mq = mvm->queue_to_mac80211[queue];
 737
 738         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 739                 return;
 740
 741         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 742                 IWL_DEBUG_TX_QUEUES(mvm,
 743                                     "queue %d (mac80211 %d) still stopped\n",
 744                                     queue, mq);
 745                 return;
 746         }
 747
 748         ieee80211_wake_queue(mvm->hw, mq);
 749 }
 750
 751 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 752 {
 753         if (state)
 754                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 755         else
 756                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 757
 758         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 759 }
 760
 761 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 762 {
 763         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 764         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 765
 766         if (state)
 767                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 768         else
 769                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 770
 771         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 772
 773         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 774         if (calibrating)
 775                 iwl_abort_notification_waits(&mvm->notif_wait);
 776
 777         /*
 778          * Stop the device if we run OPERATIONAL firmware or if we are in the
 779          * middle of the calibrations.
 780          */
 781         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 782 }
 783
 784 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 785 {
 786         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 787         struct ieee80211_tx_info *info;
 788
 789         info = IEEE80211_SKB_CB(skb);
 790         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 791         ieee80211_free_txskb(mvm->hw, skb);
 792 }
 793
 794 struct iwl_mvm_reprobe {
 795         struct device *dev;
 796         struct work_struct work;
 797 };
 798
 799 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 800 {
 801         struct iwl_mvm_reprobe *reprobe;
 802
 803         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 804         if (device_reprobe(reprobe->dev))
 805                 dev_err(reprobe->dev, "reprobe failed!\n");
 806         kfree(reprobe);
 807         module_put(THIS_MODULE);
 808 }
 809
 810 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 811 {
 812         struct iwl_mvm *mvm =
 813                 container_of(work, struct iwl_mvm, fw_error_dump_wk);
 814
 815         mutex_lock(&mvm->mutex);
 816         iwl_mvm_fw_error_dump(mvm);
 817         mutex_unlock(&mvm->mutex);
 818 }
 819
 820 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 821 {
 822         iwl_abort_notification_waits(&mvm->notif_wait);
 823
 824         /*
 825          * This is a bit racy, but worst case we tell mac80211 about
 826          * a stopped/aborted scan when that was already done which
 827          * is not a problem. It is necessary to abort any os scan
 828          * here because mac80211 requires having the scan cleared
 829          * before restarting.
 830          * We'll reset the scan_status to NONE in restart cleanup in
 831          * the next start() call from mac80211. If restart isn't called
 832          * (no fw restart) scan status will stay busy.
 833          */
 834         switch (mvm->scan_status) {
 835         case IWL_MVM_SCAN_NONE:
 836                 break;
 837         case IWL_MVM_SCAN_OS:
 838                 ieee80211_scan_completed(mvm->hw, true);
 839                 break;
 840         case IWL_MVM_SCAN_SCHED:
 841                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 842                 if (!mvm->restart_fw)
 843                         ieee80211_sched_scan_stopped(mvm->hw);
 844                 break;
 845         }
 846
 847         /*
 848          * If we're restarting already, don't cycle restarts.
 849          * If INIT fw asserted, it will likely fail again.
 850          * If WoWLAN fw asserted, don't restart either, mac80211
 851          * can't recover this since we're already half suspended.
 852          */
 853         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 854                 struct iwl_mvm_reprobe *reprobe;
 855
 856                 IWL_ERR(mvm,
 857                         "Firmware error during reconfiguration - reprobe!\n");
 858
 859                 /*
 860                  * get a module reference to avoid doing this while unloading
 861                  * anyway and to avoid scheduling a work with code that's
 862                  * being removed.
 863                  */
 864                 if (!try_module_get(THIS_MODULE)) {
 865                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 866                         return;
 867                 }
 868
 869                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 870                 if (!reprobe) {
 871                         module_put(THIS_MODULE);
 872                         return;
 873                 }
 874                 reprobe->dev = mvm->trans->dev;
 875                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 876                 schedule_work(&reprobe->work);
 877         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
 878                    (!fw_error || mvm->restart_fw)) {
 879                 /* don't let the transport/FW power down */
 880                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 881
 882                 if (fw_error && mvm->restart_fw > 0)
 883                         mvm->restart_fw--;
 884                 ieee80211_restart_hw(mvm->hw);
 885         } else if (fw_error) {
 886                 schedule_work(&mvm->fw_error_dump_wk);
 887         }
 888 }
 889
 890 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 891 {
 892         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 893
 894         iwl_mvm_dump_nic_error_log(mvm);
 895
 896         iwl_mvm_nic_restart(mvm, true);
 897 }
 898
 899 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 900 {
 901         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 902
 903         WARN_ON(1);
 904         iwl_mvm_nic_restart(mvm, true);
 905 }
 906
 907 struct iwl_d0i3_iter_data {
 908         struct iwl_mvm *mvm;
 909         u8 ap_sta_id;
 910         u8 vif_count;
 911         u8 offloading_tid;
 912         bool disable_offloading;
 913 };
 914
 915 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 916                                         struct ieee80211_vif *vif,
 917                                         struct iwl_d0i3_iter_data *iter_data)
 918 {
 919         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 920         struct ieee80211_sta *ap_sta;
 921         struct iwl_mvm_sta *mvmsta;
 922         u32 available_tids = 0;
 923         u8 tid;
 924
 925         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 926                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 927                 return false;
 928
 929         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 930         if (IS_ERR_OR_NULL(ap_sta))
 931                 return false;
 932
 933         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 934         spin_lock_bh(&mvmsta->lock);
 935         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 936                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 937
 938                 /*
 939                  * in case of pending tx packets, don't use this tid
 940                  * for offloading in order to prevent reuse of the same
 941                  * qos seq counters.
 942                  */
 943                 if (iwl_mvm_tid_queued(tid_data))
 944                         continue;
 945
 946                 if (tid_data->state != IWL_AGG_OFF)
 947                         continue;
 948
 949                 available_tids |= BIT(tid);
 950         }
 951         spin_unlock_bh(&mvmsta->lock);
 952
 953         /*
 954          * disallow protocol offloading if we have no available tid
 955          * (with no pending frames and no active aggregation,
 956          * as we don't handle "holes" properly - the scheduler needs the
 957          * frame's seq number and TFD index to match)
 958          */
 959         if (!available_tids)
 960                 return true;
 961
 962         /* for simplicity, just use the first available tid */
 963         iter_data->offloading_tid = ffs(available_tids) - 1;
 964         return false;
 965 }
 966
 967 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 968                                         struct ieee80211_vif *vif)
 969 {
 970         struct iwl_d0i3_iter_data *data = _data;
 971         struct iwl_mvm *mvm = data->mvm;
 972         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 973         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 974
 975         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 976         if (vif->type != NL80211_IFTYPE_STATION ||
 977             !vif->bss_conf.assoc)
 978                 return;
 979
 980         /*
 981          * in case of pending tx packets or active aggregations,
 982          * avoid offloading features in order to prevent reuse of
 983          * the same qos seq counters.
 984          */
 985         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 986                 data->disable_offloading = true;
 987
 988         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 989         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 990
 991         /*
 992          * on init/association, mvm already configures POWER_TABLE_CMD
 993          * and REPLY_MCAST_FILTER_CMD, so currently don't
 994          * reconfigure them (we might want to use different
 995          * params later on, though).
 996          */
 997         data->ap_sta_id = mvmvif->ap_sta_id;
 998         data->vif_count++;
 999 }
1000
1001 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1002                                     struct iwl_wowlan_config_cmd_v3 *cmd,
1003                                     struct iwl_d0i3_iter_data *iter_data)
1004 {
1005         struct ieee80211_sta *ap_sta;
1006         struct iwl_mvm_sta *mvm_ap_sta;
1007
1008         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1009                 return;
1010
1011         rcu_read_lock();
1012
1013         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1014         if (IS_ERR_OR_NULL(ap_sta))
1015                 goto out;
1016
1017         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1018         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
1019         cmd->offloading_tid = iter_data->offloading_tid;
1020
1021         /*
1022          * The d0i3 uCode takes care of the nonqos counters,
1023          * so configure only the qos seq ones.
1024          */
1025         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
1026 out:
1027         rcu_read_unlock();
1028 }
1029 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1030 {
1031         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1032         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1033         int ret;
1034         struct iwl_d0i3_iter_data d0i3_iter_data = {
1035                 .mvm = mvm,
1036         };
1037         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1038                 .common = {
1039                         .wakeup_filter =
1040                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1041                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
1042                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1043                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1044                 },
1045         };
1046         struct iwl_d3_manager_config d3_cfg_cmd = {
1047                 .min_sleep_time = cpu_to_le32(1000),
1048         };
1049
1050         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1051
1052         /* make sure we have no running tx while configuring the qos */
1053         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1054         synchronize_net();
1055
1056         /*
1057          * iwl_mvm_ref_sync takes a reference before checking the flag.
1058          * so by checking there is no held reference we prevent a state
1059          * in which iwl_mvm_ref_sync continues successfully while we
1060          * configure the firmware to enter d0i3
1061          */
1062         if (iwl_mvm_ref_taken(mvm)) {
1063                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1064                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1065                 wake_up(&mvm->d0i3_exit_waitq);
1066                 return 1;
1067         }
1068
1069         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1070                                                    IEEE80211_IFACE_ITER_NORMAL,
1071                                                    iwl_mvm_enter_d0i3_iterator,
1072                                                    &d0i3_iter_data);
1073         if (d0i3_iter_data.vif_count == 1) {
1074                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1075                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1076         } else {
1077                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1078                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1079                 mvm->d0i3_offloading = false;
1080         }
1081
1082         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1083         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1084                                    sizeof(wowlan_config_cmd),
1085                                    &wowlan_config_cmd);
1086         if (ret)
1087                 return ret;
1088
1089         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1090                                     flags | CMD_MAKE_TRANS_IDLE,
1091                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1092 }
1093
1094 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1095                                        struct ieee80211_vif *vif)
1096 {
1097         struct iwl_mvm *mvm = _data;
1098         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1099
1100         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1101         if (vif->type != NL80211_IFTYPE_STATION ||
1102             !vif->bss_conf.assoc)
1103                 return;
1104
1105         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1106 }
1107
1108 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1109                                          struct ieee80211_vif *vif)
1110 {
1111         struct iwl_mvm *mvm = data;
1112         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1113
1114         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1115             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1116                 ieee80211_connection_loss(vif);
1117 }
1118
1119 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1120 {
1121         struct ieee80211_sta *sta = NULL;
1122         struct iwl_mvm_sta *mvm_ap_sta;
1123         int i;
1124         bool wake_queues = false;
1125
1126         lockdep_assert_held(&mvm->mutex);
1127
1128         spin_lock_bh(&mvm->d0i3_tx_lock);
1129
1130         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1131                 goto out;
1132
1133         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1134
1135         /* get the sta in order to update seq numbers and re-enqueue skbs */
1136         sta = rcu_dereference_protected(
1137                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1138                         lockdep_is_held(&mvm->mutex));
1139
1140         if (IS_ERR_OR_NULL(sta)) {
1141                 sta = NULL;
1142                 goto out;
1143         }
1144
1145         if (mvm->d0i3_offloading && qos_seq) {
1146                 /* update qos seq numbers if offloading was enabled */
1147                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1148                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1149                         u16 seq = le16_to_cpu(qos_seq[i]);
1150                         /* firmware stores last-used one, we store next one */
1151                         seq += 0x10;
1152                         mvm_ap_sta->tid_data[i].seq_number = seq;
1153                 }
1154         }
1155 out:
1156         /* re-enqueue (or drop) all packets */
1157         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1158                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1159
1160                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1161                         ieee80211_free_txskb(mvm->hw, skb);
1162
1163                 /* if the skb_queue is not empty, we need to wake queues */
1164                 wake_queues = true;
1165         }
1166         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1167         wake_up(&mvm->d0i3_exit_waitq);
1168         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1169         if (wake_queues)
1170                 ieee80211_wake_queues(mvm->hw);
1171
1172         spin_unlock_bh(&mvm->d0i3_tx_lock);
1173 }
1174
1175 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1176 {
1177         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1178         struct iwl_host_cmd get_status_cmd = {
1179                 .id = WOWLAN_GET_STATUSES,
1180                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1181         };
1182         struct iwl_wowlan_status *status;
1183         int ret;
1184         u32 disconnection_reasons, wakeup_reasons;
1185         __le16 *qos_seq = NULL;
1186
1187         mutex_lock(&mvm->mutex);
1188         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1189         if (ret)
1190                 goto out;
1191
1192         if (!get_status_cmd.resp_pkt)
1193                 goto out;
1194
1195         status = (void *)get_status_cmd.resp_pkt->data;
1196         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1197         qos_seq = status->qos_seq_ctr;
1198
1199         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1200
1201         disconnection_reasons =
1202                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1203                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1204         if (wakeup_reasons & disconnection_reasons)
1205                 ieee80211_iterate_active_interfaces(
1206                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1207                         iwl_mvm_d0i3_disconnect_iter, mvm);
1208
1209         iwl_free_resp(&get_status_cmd);
1210 out:
1211         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1212         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1213         mutex_unlock(&mvm->mutex);
1214 }
1215
1216 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1217 {
1218         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1219                     CMD_WAKE_UP_TRANS;
1220         int ret;
1221
1222         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1223
1224         mutex_lock(&mvm->d0i3_suspend_mutex);
1225         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1226                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1227                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1228                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1229                 return 0;
1230         }
1231         mutex_unlock(&mvm->d0i3_suspend_mutex);
1232
1233         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1234         if (ret)
1235                 goto out;
1236
1237         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1238                                                    IEEE80211_IFACE_ITER_NORMAL,
1239                                                    iwl_mvm_exit_d0i3_iterator,
1240                                                    mvm);
1241 out:
1242         schedule_work(&mvm->d0i3_exit_work);
1243         return ret;
1244 }
1245
1246 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1247 {
1248         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1249
1250         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1251         return _iwl_mvm_exit_d0i3(mvm);
1252 }
1253
1254 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1255                              struct napi_struct *napi,
1256                              struct net_device *napi_dev,
1257                              int (*poll)(struct napi_struct *, int),
1258                              int weight)
1259 {
1260         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1261
1262         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1263 }
1264
1265 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1266         .start = iwl_op_mode_mvm_start,
1267         .stop = iwl_op_mode_mvm_stop,
1268         .rx = iwl_mvm_rx_dispatch,
1269         .queue_full = iwl_mvm_stop_sw_queue,
1270         .queue_not_full = iwl_mvm_wake_sw_queue,
1271         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1272         .free_skb = iwl_mvm_free_skb,
1273         .nic_error = iwl_mvm_nic_error,
1274         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1275         .nic_config = iwl_mvm_nic_config,
1276         .enter_d0i3 = iwl_mvm_enter_d0i3,
1277         .exit_d0i3 = iwl_mvm_exit_d0i3,
1278         .napi_add = iwl_mvm_napi_add,
1279 };