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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/module.h>
  64 #include <linux/vmalloc.h>
  65 #include <net/mac80211.h>
  66
  67 #include "iwl-notif-wait.h"
  68 #include "iwl-trans.h"
  69 #include "iwl-op-mode.h"
  70 #include "iwl-fw.h"
  71 #include "iwl-debug.h"
  72 #include "iwl-drv.h"
  73 #include "iwl-modparams.h"
  74 #include "mvm.h"
  75 #include "iwl-phy-db.h"
  76 #include "iwl-eeprom-parse.h"
  77 #include "iwl-csr.h"
  78 #include "iwl-io.h"
  79 #include "iwl-prph.h"
  80 #include "rs.h"
  81 #include "fw-api-scan.h"
  82 #include "fw-error-dump.h"
  83 #include "time-event.h"
  84
  85 /*
  86  * module name, copyright, version, etc.
  87  */
  88 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  89
  90 #define DRV_VERSION     IWLWIFI_VERSION
  91
  92 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  93 MODULE_VERSION(DRV_VERSION);
  94 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  95 MODULE_LICENSE("GPL");
  96
  97 static const struct iwl_op_mode_ops iwl_mvm_ops;
  98
  99 struct iwl_mvm_mod_params iwlmvm_mod_params = {
 100         .power_scheme = IWL_POWER_SCHEME_BPS,
 101         /* rest of fields are 0 by default */
 102 };
 103
 104 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 105 MODULE_PARM_DESC(init_dbg,
 106                  "set to true to debug an ASSERT in INIT fw (default: false");
 107 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 108 MODULE_PARM_DESC(power_scheme,
 109                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 110
 111 /*
 112  * module init and exit functions
 113  */
 114 static int __init iwl_mvm_init(void)
 115 {
 116         int ret;
 117
 118         ret = iwl_mvm_rate_control_register();
 119         if (ret) {
 120                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 121                 return ret;
 122         }
 123
 124         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 125
 126         if (ret) {
 127                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 128                 iwl_mvm_rate_control_unregister();
 129         }
 130
 131         return ret;
 132 }
 133 module_init(iwl_mvm_init);
 134
 135 static void __exit iwl_mvm_exit(void)
 136 {
 137         iwl_opmode_deregister("iwlmvm");
 138         iwl_mvm_rate_control_unregister();
 139 }
 140 module_exit(iwl_mvm_exit);
 141
 142 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 143 {
 144         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 145         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 146         u32 reg_val = 0;
 147
 148         radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 149                           FW_PHY_CFG_RADIO_TYPE_POS;
 150         radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
 151                           FW_PHY_CFG_RADIO_STEP_POS;
 152         radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
 153                           FW_PHY_CFG_RADIO_DASH_POS;
 154
 155         /* SKU control */
 156         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 157                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 158         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 160
 161         /* radio configuration */
 162         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 163         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 164         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 165
 166         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 167                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 168
 169         /* silicon bits */
 170         reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 171
 172         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 173                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 174                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 175                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 176                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 177                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 178                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 179                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 180                                 reg_val);
 181
 182         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 183                        radio_cfg_step, radio_cfg_dash);
 184
 185         /*
 186          * W/A : NIC is stuck in a reset state after Early PCIe power off
 187          * (PCIe power is lost before PERST# is asserted), causing ME FW
 188          * to lose ownership and not being able to obtain it back.
 189          */
 190         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 191                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 192                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 193                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 194 }
 195
 196 struct iwl_rx_handlers {
 197         u8 cmd_id;
 198         bool async;
 199         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 200                   struct iwl_device_cmd *cmd);
 201 };
 202
 203 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 204         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 205
 206 /*
 207  * Handlers for fw notifications
 208  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 209  * This list should be in order of frequency for performance purposes.
 210  *
 211  * The handler can be SYNC - this means that it will be called in the Rx path
 212  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 213  * only in this case!), it should be set as ASYNC. In that case, it will be
 214  * called from a worker with mvm->mutex held.
 215  */
 216 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 217         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 218         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 219         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 220         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 221
 222         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 223         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false),
 224         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 225         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 226                    iwl_mvm_rx_ant_coupling_notif, true),
 227
 228         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 229
 230         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 231
 232         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 233         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 234         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 235                    iwl_mvm_rx_scan_offload_complete_notif, true),
 236         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_sched_scan_results,
 237                    false),
 238
 239         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 240         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 241
 242         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 243                    false),
 244
 245         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 246         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 247                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 248 };
 249 #undef RX_HANDLER
 250 #define CMD(x) [x] = #x
 251
 252 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 253         CMD(MVM_ALIVE),
 254         CMD(REPLY_ERROR),
 255         CMD(INIT_COMPLETE_NOTIF),
 256         CMD(PHY_CONTEXT_CMD),
 257         CMD(MGMT_MCAST_KEY),
 258         CMD(TX_CMD),
 259         CMD(TXPATH_FLUSH),
 260         CMD(MAC_CONTEXT_CMD),
 261         CMD(TIME_EVENT_CMD),
 262         CMD(TIME_EVENT_NOTIFICATION),
 263         CMD(BINDING_CONTEXT_CMD),
 264         CMD(TIME_QUOTA_CMD),
 265         CMD(NON_QOS_TX_COUNTER_CMD),
 266         CMD(RADIO_VERSION_NOTIFICATION),
 267         CMD(SCAN_REQUEST_CMD),
 268         CMD(SCAN_ABORT_CMD),
 269         CMD(SCAN_START_NOTIFICATION),
 270         CMD(SCAN_RESULTS_NOTIFICATION),
 271         CMD(SCAN_COMPLETE_NOTIFICATION),
 272         CMD(NVM_ACCESS_CMD),
 273         CMD(PHY_CONFIGURATION_CMD),
 274         CMD(CALIB_RES_NOTIF_PHY_DB),
 275         CMD(SET_CALIB_DEFAULT_CMD),
 276         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 277         CMD(ADD_STA_KEY),
 278         CMD(ADD_STA),
 279         CMD(REMOVE_STA),
 280         CMD(LQ_CMD),
 281         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 282         CMD(MATCH_FOUND_NOTIFICATION),
 283         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 284         CMD(SCAN_OFFLOAD_ABORT_CMD),
 285         CMD(SCAN_OFFLOAD_COMPLETE),
 286         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 287         CMD(POWER_TABLE_CMD),
 288         CMD(WEP_KEY),
 289         CMD(REPLY_RX_PHY_CMD),
 290         CMD(REPLY_RX_MPDU_CMD),
 291         CMD(BEACON_NOTIFICATION),
 292         CMD(BEACON_TEMPLATE_CMD),
 293         CMD(STATISTICS_NOTIFICATION),
 294         CMD(EOSP_NOTIFICATION),
 295         CMD(REDUCE_TX_POWER_CMD),
 296         CMD(TX_ANT_CONFIGURATION_CMD),
 297         CMD(D3_CONFIG_CMD),
 298         CMD(D0I3_END_CMD),
 299         CMD(PROT_OFFLOAD_CONFIG_CMD),
 300         CMD(OFFLOADS_QUERY_CMD),
 301         CMD(REMOTE_WAKE_CONFIG_CMD),
 302         CMD(WOWLAN_PATTERNS),
 303         CMD(WOWLAN_CONFIGURATION),
 304         CMD(WOWLAN_TSC_RSC_PARAM),
 305         CMD(WOWLAN_TKIP_PARAM),
 306         CMD(WOWLAN_KEK_KCK_MATERIAL),
 307         CMD(WOWLAN_GET_STATUSES),
 308         CMD(WOWLAN_TX_POWER_PER_DB),
 309         CMD(NET_DETECT_CONFIG_CMD),
 310         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 311         CMD(NET_DETECT_PROFILES_CMD),
 312         CMD(NET_DETECT_HOTSPOTS_CMD),
 313         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 314         CMD(CARD_STATE_NOTIFICATION),
 315         CMD(MISSED_BEACONS_NOTIFICATION),
 316         CMD(BT_COEX_PRIO_TABLE),
 317         CMD(BT_COEX_PROT_ENV),
 318         CMD(BT_PROFILE_NOTIFICATION),
 319         CMD(BT_CONFIG),
 320         CMD(MCAST_FILTER_CMD),
 321         CMD(BCAST_FILTER_CMD),
 322         CMD(REPLY_SF_CFG_CMD),
 323         CMD(REPLY_BEACON_FILTERING_CMD),
 324         CMD(REPLY_THERMAL_MNG_BACKOFF),
 325         CMD(MAC_PM_POWER_TABLE),
 326         CMD(BT_COEX_CI),
 327         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 328         CMD(ANTENNA_COUPLING_NOTIFICATION),
 329 };
 330 #undef CMD
 331
 332 /* this forward declaration can avoid to export the function */
 333 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 334 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 335
 336 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 337 {
 338         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 339
 340         if (!pwr_tx_backoff)
 341                 return 0;
 342
 343         while (pwr_tx_backoff->pwr) {
 344                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 345                         return pwr_tx_backoff->backoff;
 346
 347                 pwr_tx_backoff++;
 348         }
 349
 350         return 0;
 351 }
 352
 353 static struct iwl_op_mode *
 354 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 355                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 356 {
 357         struct ieee80211_hw *hw;
 358         struct iwl_op_mode *op_mode;
 359         struct iwl_mvm *mvm;
 360         struct iwl_trans_config trans_cfg = {};
 361         static const u8 no_reclaim_cmds[] = {
 362                 TX_CMD,
 363         };
 364         int err, scan_size;
 365         u32 min_backoff;
 366
 367         /*
 368          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 369          * index all over the driver - check that its value corresponds to the
 370          * array size.
 371          */
 372         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 373
 374         /********************************
 375          * 1. Allocating and configuring HW data
 376          ********************************/
 377         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 378                                 sizeof(struct iwl_mvm),
 379                                 &iwl_mvm_hw_ops);
 380         if (!hw)
 381                 return NULL;
 382
 383         op_mode = hw->priv;
 384         op_mode->ops = &iwl_mvm_ops;
 385
 386         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 387         mvm->dev = trans->dev;
 388         mvm->trans = trans;
 389         mvm->cfg = cfg;
 390         mvm->fw = fw;
 391         mvm->hw = hw;
 392
 393         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 394
 395         mvm->aux_queue = 15;
 396         mvm->first_agg_queue = 16;
 397         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 398         if (mvm->cfg->base_params->num_of_queues == 16) {
 399                 mvm->aux_queue = 11;
 400                 mvm->first_agg_queue = 12;
 401         }
 402         mvm->sf_state = SF_UNINIT;
 403
 404         mutex_init(&mvm->mutex);
 405         spin_lock_init(&mvm->async_handlers_lock);
 406         INIT_LIST_HEAD(&mvm->time_event_list);
 407         INIT_LIST_HEAD(&mvm->async_handlers_list);
 408         spin_lock_init(&mvm->time_event_lock);
 409
 410         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 411         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 412         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 413         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 414
 415         spin_lock_init(&mvm->d0i3_tx_lock);
 416         skb_queue_head_init(&mvm->d0i3_tx);
 417         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 418
 419         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 420
 421         /*
 422          * Populate the state variables that the transport layer needs
 423          * to know about.
 424          */
 425         trans_cfg.op_mode = op_mode;
 426         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 427         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 428         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 429
 430         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 431                 trans_cfg.bc_table_dword = true;
 432
 433         if (!iwlwifi_mod_params.wd_disable)
 434                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 435         else
 436                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 437
 438         trans_cfg.command_names = iwl_mvm_cmd_strings;
 439
 440         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 441         trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
 442
 443         snprintf(mvm->hw->wiphy->fw_version,
 444                  sizeof(mvm->hw->wiphy->fw_version),
 445                  "%s", fw->fw_version);
 446
 447         /* Configure transport layer */
 448         iwl_trans_configure(mvm->trans, &trans_cfg);
 449
 450         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 451         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 452
 453         /* set up notification wait support */
 454         iwl_notification_wait_init(&mvm->notif_wait);
 455
 456         /* Init phy db */
 457         mvm->phy_db = iwl_phy_db_init(trans);
 458         if (!mvm->phy_db) {
 459                 IWL_ERR(mvm, "Cannot init phy_db\n");
 460                 goto out_free;
 461         }
 462
 463         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 464                  mvm->cfg->name, mvm->trans->hw_rev);
 465
 466         min_backoff = calc_min_backoff(trans, cfg);
 467         iwl_mvm_tt_initialize(mvm, min_backoff);
 468
 469         /*
 470          * If the NVM exists in an external file,
 471          * there is no need to unnecessarily power up the NIC at driver load
 472          */
 473         if (iwlwifi_mod_params.nvm_file) {
 474                 err = iwl_nvm_init(mvm);
 475                 if (err)
 476                         goto out_free;
 477         } else {
 478                 err = iwl_trans_start_hw(mvm->trans);
 479                 if (err)
 480                         goto out_free;
 481
 482                 mutex_lock(&mvm->mutex);
 483                 err = iwl_run_init_mvm_ucode(mvm, true);
 484                 iwl_trans_stop_device(trans);
 485                 mutex_unlock(&mvm->mutex);
 486                 /* returns 0 if successful, 1 if success but in rfkill */
 487                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 488                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 489                         goto out_free;
 490                 }
 491         }
 492
 493         scan_size = sizeof(struct iwl_scan_cmd) +
 494                 mvm->fw->ucode_capa.max_probe_length +
 495                 (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel));
 496         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 497         if (!mvm->scan_cmd)
 498                 goto out_free;
 499
 500         err = iwl_mvm_mac_setup_register(mvm);
 501         if (err)
 502                 goto out_free;
 503
 504         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 505         if (err)
 506                 goto out_unregister;
 507
 508         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 509
 510         /* rpm starts with a taken ref. only set the appropriate bit here. */
 511         set_bit(IWL_MVM_REF_UCODE_DOWN, mvm->ref_bitmap);
 512
 513         return op_mode;
 514
 515  out_unregister:
 516         ieee80211_unregister_hw(mvm->hw);
 517         iwl_mvm_leds_exit(mvm);
 518  out_free:
 519         iwl_phy_db_free(mvm->phy_db);
 520         kfree(mvm->scan_cmd);
 521         if (!iwlwifi_mod_params.nvm_file)
 522                 iwl_trans_op_mode_leave(trans);
 523         ieee80211_free_hw(mvm->hw);
 524         return NULL;
 525 }
 526
 527 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 528 {
 529         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 530         int i;
 531
 532         iwl_mvm_leds_exit(mvm);
 533
 534         iwl_mvm_tt_exit(mvm);
 535
 536         ieee80211_unregister_hw(mvm->hw);
 537
 538         kfree(mvm->scan_cmd);
 539         vfree(mvm->fw_error_dump);
 540         kfree(mvm->fw_error_sram);
 541         kfree(mvm->fw_error_rxf);
 542         kfree(mvm->mcast_filter_cmd);
 543         mvm->mcast_filter_cmd = NULL;
 544
 545 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 546         kfree(mvm->d3_resume_sram);
 547 #endif
 548
 549         iwl_trans_op_mode_leave(mvm->trans);
 550
 551         iwl_phy_db_free(mvm->phy_db);
 552         mvm->phy_db = NULL;
 553
 554         iwl_free_nvm_data(mvm->nvm_data);
 555         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 556                 kfree(mvm->nvm_sections[i].data);
 557
 558         ieee80211_free_hw(mvm->hw);
 559 }
 560
 561 struct iwl_async_handler_entry {
 562         struct list_head list;
 563         struct iwl_rx_cmd_buffer rxb;
 564         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 565                   struct iwl_device_cmd *cmd);
 566 };
 567
 568 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 569 {
 570         struct iwl_async_handler_entry *entry, *tmp;
 571
 572         spin_lock_bh(&mvm->async_handlers_lock);
 573         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 574                 iwl_free_rxb(&entry->rxb);
 575                 list_del(&entry->list);
 576                 kfree(entry);
 577         }
 578         spin_unlock_bh(&mvm->async_handlers_lock);
 579 }
 580
 581 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 582 {
 583         struct iwl_mvm *mvm =
 584                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 585         struct iwl_async_handler_entry *entry, *tmp;
 586         struct list_head local_list;
 587
 588         INIT_LIST_HEAD(&local_list);
 589
 590         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 591         mutex_lock(&mvm->mutex);
 592
 593         /*
 594          * Sync with Rx path with a lock. Remove all the entries from this list,
 595          * add them to a local one (lock free), and then handle them.
 596          */
 597         spin_lock_bh(&mvm->async_handlers_lock);
 598         list_splice_init(&mvm->async_handlers_list, &local_list);
 599         spin_unlock_bh(&mvm->async_handlers_lock);
 600
 601         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 602                 if (entry->fn(mvm, &entry->rxb, NULL))
 603                         IWL_WARN(mvm,
 604                                  "returned value from ASYNC handlers are ignored\n");
 605                 iwl_free_rxb(&entry->rxb);
 606                 list_del(&entry->list);
 607                 kfree(entry);
 608         }
 609         mutex_unlock(&mvm->mutex);
 610 }
 611
 612 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 613                                struct iwl_rx_cmd_buffer *rxb,
 614                                struct iwl_device_cmd *cmd)
 615 {
 616         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 617         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 618         u8 i;
 619
 620         /*
 621          * Do the notification wait before RX handlers so
 622          * even if the RX handler consumes the RXB we have
 623          * access to it in the notification wait entry.
 624          */
 625         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 626
 627         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 628                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 629                 struct iwl_async_handler_entry *entry;
 630
 631                 if (rx_h->cmd_id != pkt->hdr.cmd)
 632                         continue;
 633
 634                 if (!rx_h->async)
 635                         return rx_h->fn(mvm, rxb, cmd);
 636
 637                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 638                 /* we can't do much... */
 639                 if (!entry)
 640                         return 0;
 641
 642                 entry->rxb._page = rxb_steal_page(rxb);
 643                 entry->rxb._offset = rxb->_offset;
 644                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 645                 entry->fn = rx_h->fn;
 646                 spin_lock(&mvm->async_handlers_lock);
 647                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 648                 spin_unlock(&mvm->async_handlers_lock);
 649                 schedule_work(&mvm->async_handlers_wk);
 650                 break;
 651         }
 652
 653         return 0;
 654 }
 655
 656 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 657 {
 658         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 659         int mq = mvm->queue_to_mac80211[queue];
 660
 661         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 662                 return;
 663
 664         if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
 665                 IWL_DEBUG_TX_QUEUES(mvm,
 666                                     "queue %d (mac80211 %d) already stopped\n",
 667                                     queue, mq);
 668                 return;
 669         }
 670
 671         set_bit(mq, &mvm->transport_queue_stop);
 672         ieee80211_stop_queue(mvm->hw, mq);
 673 }
 674
 675 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 676 {
 677         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 678         int mq = mvm->queue_to_mac80211[queue];
 679
 680         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 681                 return;
 682
 683         if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
 684                 IWL_DEBUG_TX_QUEUES(mvm,
 685                                     "queue %d (mac80211 %d) already awake\n",
 686                                     queue, mq);
 687                 return;
 688         }
 689
 690         clear_bit(mq, &mvm->transport_queue_stop);
 691
 692         ieee80211_wake_queue(mvm->hw, mq);
 693 }
 694
 695 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 696 {
 697         if (state)
 698                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 699         else
 700                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 701
 702         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 703 }
 704
 705 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 706 {
 707         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 708
 709         if (state)
 710                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 711         else
 712                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 713
 714         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 715
 716         return state && mvm->cur_ucode != IWL_UCODE_INIT;
 717 }
 718
 719 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 720 {
 721         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 722         struct ieee80211_tx_info *info;
 723
 724         info = IEEE80211_SKB_CB(skb);
 725         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 726         ieee80211_free_txskb(mvm->hw, skb);
 727 }
 728
 729 struct iwl_mvm_reprobe {
 730         struct device *dev;
 731         struct work_struct work;
 732 };
 733
 734 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 735 {
 736         struct iwl_mvm_reprobe *reprobe;
 737
 738         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 739         if (device_reprobe(reprobe->dev))
 740                 dev_err(reprobe->dev, "reprobe failed!\n");
 741         kfree(reprobe);
 742         module_put(THIS_MODULE);
 743 }
 744
 745 static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
 746 {
 747         iwl_abort_notification_waits(&mvm->notif_wait);
 748
 749         /*
 750          * This is a bit racy, but worst case we tell mac80211 about
 751          * a stopped/aborted scan when that was already done which
 752          * is not a problem. It is necessary to abort any os scan
 753          * here because mac80211 requires having the scan cleared
 754          * before restarting.
 755          * We'll reset the scan_status to NONE in restart cleanup in
 756          * the next start() call from mac80211. If restart isn't called
 757          * (no fw restart) scan status will stay busy.
 758          */
 759         switch (mvm->scan_status) {
 760         case IWL_MVM_SCAN_NONE:
 761                 break;
 762         case IWL_MVM_SCAN_OS:
 763                 ieee80211_scan_completed(mvm->hw, true);
 764                 break;
 765         case IWL_MVM_SCAN_SCHED:
 766                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 767                 if (!mvm->restart_fw)
 768                         ieee80211_sched_scan_stopped(mvm->hw);
 769                 break;
 770         }
 771
 772         /*
 773          * If we're restarting already, don't cycle restarts.
 774          * If INIT fw asserted, it will likely fail again.
 775          * If WoWLAN fw asserted, don't restart either, mac80211
 776          * can't recover this since we're already half suspended.
 777          */
 778         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 779                 struct iwl_mvm_reprobe *reprobe;
 780
 781                 IWL_ERR(mvm,
 782                         "Firmware error during reconfiguration - reprobe!\n");
 783
 784                 /*
 785                  * get a module reference to avoid doing this while unloading
 786                  * anyway and to avoid scheduling a work with code that's
 787                  * being removed.
 788                  */
 789                 if (!try_module_get(THIS_MODULE)) {
 790                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 791                         return;
 792                 }
 793
 794                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 795                 if (!reprobe) {
 796                         module_put(THIS_MODULE);
 797                         return;
 798                 }
 799                 reprobe->dev = mvm->trans->dev;
 800                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 801                 schedule_work(&reprobe->work);
 802         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
 803                 /* don't let the transport/FW power down */
 804                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 805
 806                 if (mvm->restart_fw > 0)
 807                         mvm->restart_fw--;
 808                 ieee80211_restart_hw(mvm->hw);
 809         }
 810 }
 811
 812 #ifdef CONFIG_IWLWIFI_DEBUGFS
 813 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 814 {
 815         struct iwl_fw_error_dump_file *dump_file;
 816         struct iwl_fw_error_dump_data *dump_data;
 817         u32 file_len;
 818
 819         lockdep_assert_held(&mvm->mutex);
 820
 821         if (mvm->fw_error_dump)
 822                 return;
 823
 824         file_len = mvm->fw_error_sram_len +
 825                    mvm->fw_error_rxf_len +
 826                    sizeof(*dump_file) +
 827                    sizeof(*dump_data) * 2;
 828
 829         dump_file = vmalloc(file_len);
 830         if (!dump_file)
 831                 return;
 832
 833         mvm->fw_error_dump = dump_file;
 834
 835         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 836         dump_file->file_len = cpu_to_le32(file_len);
 837         dump_data = (void *)dump_file->data;
 838         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 839         dump_data->len = cpu_to_le32(mvm->fw_error_rxf_len);
 840         memcpy(dump_data->data, mvm->fw_error_rxf, mvm->fw_error_rxf_len);
 841
 842         dump_data = (void *)((u8 *)dump_data->data + mvm->fw_error_rxf_len);
 843         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 844         dump_data->len = cpu_to_le32(mvm->fw_error_sram_len);
 845
 846         /*
 847          * No need for lock since at the stage the FW isn't loaded. So it
 848          * can't assert - we are the only one who can possibly be accessing
 849          * mvm->fw_error_sram right now.
 850          */
 851         memcpy(dump_data->data, mvm->fw_error_sram, mvm->fw_error_sram_len);
 852
 853         kfree(mvm->fw_error_rxf);
 854         mvm->fw_error_rxf = NULL;
 855         mvm->fw_error_rxf_len = 0;
 856
 857         kfree(mvm->fw_error_sram);
 858         mvm->fw_error_sram = NULL;
 859         mvm->fw_error_sram_len = 0;
 860 }
 861 #endif
 862
 863 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 864 {
 865         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 866
 867         iwl_mvm_dump_nic_error_log(mvm);
 868
 869 #ifdef CONFIG_IWLWIFI_DEBUGFS
 870         iwl_mvm_fw_error_sram_dump(mvm);
 871         iwl_mvm_fw_error_rxf_dump(mvm);
 872 #endif
 873
 874         iwl_mvm_nic_restart(mvm);
 875 }
 876
 877 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 878 {
 879         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 880
 881         WARN_ON(1);
 882         iwl_mvm_nic_restart(mvm);
 883 }
 884
 885 struct iwl_d0i3_iter_data {
 886         struct iwl_mvm *mvm;
 887         u8 ap_sta_id;
 888         u8 vif_count;
 889         u8 offloading_tid;
 890         bool disable_offloading;
 891 };
 892
 893 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 894                                         struct ieee80211_vif *vif,
 895                                         struct iwl_d0i3_iter_data *iter_data)
 896 {
 897         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 898         struct ieee80211_sta *ap_sta;
 899         struct iwl_mvm_sta *mvmsta;
 900         u32 available_tids = 0;
 901         u8 tid;
 902
 903         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 904                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 905                 return false;
 906
 907         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 908         if (IS_ERR_OR_NULL(ap_sta))
 909                 return false;
 910
 911         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 912         spin_lock_bh(&mvmsta->lock);
 913         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 914                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 915
 916                 /*
 917                  * in case of pending tx packets, don't use this tid
 918                  * for offloading in order to prevent reuse of the same
 919                  * qos seq counters.
 920                  */
 921                 if (iwl_mvm_tid_queued(tid_data))
 922                         continue;
 923
 924                 if (tid_data->state != IWL_AGG_OFF)
 925                         continue;
 926
 927                 available_tids |= BIT(tid);
 928         }
 929         spin_unlock_bh(&mvmsta->lock);
 930
 931         /*
 932          * disallow protocol offloading if we have no available tid
 933          * (with no pending frames and no active aggregation,
 934          * as we don't handle "holes" properly - the scheduler needs the
 935          * frame's seq number and TFD index to match)
 936          */
 937         if (!available_tids)
 938                 return true;
 939
 940         /* for simplicity, just use the first available tid */
 941         iter_data->offloading_tid = ffs(available_tids) - 1;
 942         return false;
 943 }
 944
 945 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 946                                         struct ieee80211_vif *vif)
 947 {
 948         struct iwl_d0i3_iter_data *data = _data;
 949         struct iwl_mvm *mvm = data->mvm;
 950         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 951         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 952
 953         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 954         if (vif->type != NL80211_IFTYPE_STATION ||
 955             !vif->bss_conf.assoc)
 956                 return;
 957
 958         /*
 959          * in case of pending tx packets or active aggregations,
 960          * avoid offloading features in order to prevent reuse of
 961          * the same qos seq counters.
 962          */
 963         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 964                 data->disable_offloading = true;
 965
 966         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 967         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 968
 969         /*
 970          * on init/association, mvm already configures POWER_TABLE_CMD
 971          * and REPLY_MCAST_FILTER_CMD, so currently don't
 972          * reconfigure them (we might want to use different
 973          * params later on, though).
 974          */
 975         data->ap_sta_id = mvmvif->ap_sta_id;
 976         data->vif_count++;
 977 }
 978
 979 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
 980                                     struct iwl_wowlan_config_cmd_v3 *cmd,
 981                                     struct iwl_d0i3_iter_data *iter_data)
 982 {
 983         struct ieee80211_sta *ap_sta;
 984         struct iwl_mvm_sta *mvm_ap_sta;
 985
 986         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
 987                 return;
 988
 989         rcu_read_lock();
 990
 991         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
 992         if (IS_ERR_OR_NULL(ap_sta))
 993                 goto out;
 994
 995         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 996         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
 997         cmd->offloading_tid = iter_data->offloading_tid;
 998
 999         /*
1000          * The d0i3 uCode takes care of the nonqos counters,
1001          * so configure only the qos seq ones.
1002          */
1003         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
1004 out:
1005         rcu_read_unlock();
1006 }
1007 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1008 {
1009         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1010         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1011         int ret;
1012         struct iwl_d0i3_iter_data d0i3_iter_data = {
1013                 .mvm = mvm,
1014         };
1015         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1016                 .common = {
1017                         .wakeup_filter =
1018                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1019                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
1020                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1021                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1022                 },
1023         };
1024         struct iwl_d3_manager_config d3_cfg_cmd = {
1025                 .min_sleep_time = cpu_to_le32(1000),
1026         };
1027
1028         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1029
1030         /* make sure we have no running tx while configuring the qos */
1031         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1032         synchronize_net();
1033
1034         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1035                                                    IEEE80211_IFACE_ITER_NORMAL,
1036                                                    iwl_mvm_enter_d0i3_iterator,
1037                                                    &d0i3_iter_data);
1038         if (d0i3_iter_data.vif_count == 1) {
1039                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1040                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1041         } else {
1042                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1043                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1044                 mvm->d0i3_offloading = false;
1045         }
1046
1047         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1048         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1049                                    sizeof(wowlan_config_cmd),
1050                                    &wowlan_config_cmd);
1051         if (ret)
1052                 return ret;
1053
1054         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1055                                     flags | CMD_MAKE_TRANS_IDLE,
1056                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1057 }
1058
1059 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1060                                        struct ieee80211_vif *vif)
1061 {
1062         struct iwl_mvm *mvm = _data;
1063         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1064
1065         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1066         if (vif->type != NL80211_IFTYPE_STATION ||
1067             !vif->bss_conf.assoc)
1068                 return;
1069
1070         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1071 }
1072
1073 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1074                                          struct ieee80211_vif *vif)
1075 {
1076         struct iwl_mvm *mvm = data;
1077         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1078
1079         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1080             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1081                 ieee80211_connection_loss(vif);
1082 }
1083
1084 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1085 {
1086         struct ieee80211_sta *sta = NULL;
1087         struct iwl_mvm_sta *mvm_ap_sta;
1088         int i;
1089         bool wake_queues = false;
1090
1091         lockdep_assert_held(&mvm->mutex);
1092
1093         spin_lock_bh(&mvm->d0i3_tx_lock);
1094
1095         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1096                 goto out;
1097
1098         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1099
1100         /* get the sta in order to update seq numbers and re-enqueue skbs */
1101         sta = rcu_dereference_protected(
1102                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1103                         lockdep_is_held(&mvm->mutex));
1104
1105         if (IS_ERR_OR_NULL(sta)) {
1106                 sta = NULL;
1107                 goto out;
1108         }
1109
1110         if (mvm->d0i3_offloading && qos_seq) {
1111                 /* update qos seq numbers if offloading was enabled */
1112                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1113                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1114                         u16 seq = le16_to_cpu(qos_seq[i]);
1115                         /* firmware stores last-used one, we store next one */
1116                         seq += 0x10;
1117                         mvm_ap_sta->tid_data[i].seq_number = seq;
1118                 }
1119         }
1120 out:
1121         /* re-enqueue (or drop) all packets */
1122         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1123                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1124
1125                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1126                         ieee80211_free_txskb(mvm->hw, skb);
1127
1128                 /* if the skb_queue is not empty, we need to wake queues */
1129                 wake_queues = true;
1130         }
1131         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1132         wake_up(&mvm->d0i3_exit_waitq);
1133         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1134         if (wake_queues)
1135                 ieee80211_wake_queues(mvm->hw);
1136
1137         spin_unlock_bh(&mvm->d0i3_tx_lock);
1138 }
1139
1140 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1141 {
1142         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1143         struct iwl_host_cmd get_status_cmd = {
1144                 .id = WOWLAN_GET_STATUSES,
1145                 .flags = CMD_SYNC | CMD_HIGH_PRIO | CMD_WANT_SKB,
1146         };
1147         struct iwl_wowlan_status *status;
1148         int ret;
1149         u32 disconnection_reasons, wakeup_reasons;
1150         __le16 *qos_seq = NULL;
1151
1152         mutex_lock(&mvm->mutex);
1153         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1154         if (ret)
1155                 goto out;
1156
1157         if (!get_status_cmd.resp_pkt)
1158                 goto out;
1159
1160         status = (void *)get_status_cmd.resp_pkt->data;
1161         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1162         qos_seq = status->qos_seq_ctr;
1163
1164         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1165
1166         disconnection_reasons =
1167                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1168                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1169         if (wakeup_reasons & disconnection_reasons)
1170                 ieee80211_iterate_active_interfaces(
1171                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1172                         iwl_mvm_d0i3_disconnect_iter, mvm);
1173
1174         iwl_free_resp(&get_status_cmd);
1175 out:
1176         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1177         mutex_unlock(&mvm->mutex);
1178 }
1179
1180 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1181 {
1182         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1183         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1184                     CMD_WAKE_UP_TRANS;
1185         int ret;
1186
1187         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1188
1189         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1190         if (ret)
1191                 goto out;
1192
1193         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1194                                                    IEEE80211_IFACE_ITER_NORMAL,
1195                                                    iwl_mvm_exit_d0i3_iterator,
1196                                                    mvm);
1197 out:
1198         schedule_work(&mvm->d0i3_exit_work);
1199         return ret;
1200 }
1201
1202 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1203                              struct napi_struct *napi,
1204                              struct net_device *napi_dev,
1205                              int (*poll)(struct napi_struct *, int),
1206                              int weight)
1207 {
1208         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1209
1210         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1211 }
1212
1213 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1214         .start = iwl_op_mode_mvm_start,
1215         .stop = iwl_op_mode_mvm_stop,
1216         .rx = iwl_mvm_rx_dispatch,
1217         .queue_full = iwl_mvm_stop_sw_queue,
1218         .queue_not_full = iwl_mvm_wake_sw_queue,
1219         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1220         .free_skb = iwl_mvm_free_skb,
1221         .nic_error = iwl_mvm_nic_error,
1222         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1223         .nic_config = iwl_mvm_nic_config,
1224         .enter_d0i3 = iwl_mvm_enter_d0i3,
1225         .exit_d0i3 = iwl_mvm_exit_d0i3,
1226         .napi_add = iwl_mvm_napi_add,
1227 };