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->mcast_filter_cmd);
 542         mvm->mcast_filter_cmd = NULL;
 543
 544 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 545         kfree(mvm->d3_resume_sram);
 546 #endif
 547
 548         iwl_trans_op_mode_leave(mvm->trans);
 549
 550         iwl_phy_db_free(mvm->phy_db);
 551         mvm->phy_db = NULL;
 552
 553         iwl_free_nvm_data(mvm->nvm_data);
 554         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 555                 kfree(mvm->nvm_sections[i].data);
 556
 557         ieee80211_free_hw(mvm->hw);
 558 }
 559
 560 struct iwl_async_handler_entry {
 561         struct list_head list;
 562         struct iwl_rx_cmd_buffer rxb;
 563         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 564                   struct iwl_device_cmd *cmd);
 565 };
 566
 567 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 568 {
 569         struct iwl_async_handler_entry *entry, *tmp;
 570
 571         spin_lock_bh(&mvm->async_handlers_lock);
 572         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 573                 iwl_free_rxb(&entry->rxb);
 574                 list_del(&entry->list);
 575                 kfree(entry);
 576         }
 577         spin_unlock_bh(&mvm->async_handlers_lock);
 578 }
 579
 580 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 581 {
 582         struct iwl_mvm *mvm =
 583                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 584         struct iwl_async_handler_entry *entry, *tmp;
 585         struct list_head local_list;
 586
 587         INIT_LIST_HEAD(&local_list);
 588
 589         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 590         mutex_lock(&mvm->mutex);
 591
 592         /*
 593          * Sync with Rx path with a lock. Remove all the entries from this list,
 594          * add them to a local one (lock free), and then handle them.
 595          */
 596         spin_lock_bh(&mvm->async_handlers_lock);
 597         list_splice_init(&mvm->async_handlers_list, &local_list);
 598         spin_unlock_bh(&mvm->async_handlers_lock);
 599
 600         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 601                 if (entry->fn(mvm, &entry->rxb, NULL))
 602                         IWL_WARN(mvm,
 603                                  "returned value from ASYNC handlers are ignored\n");
 604                 iwl_free_rxb(&entry->rxb);
 605                 list_del(&entry->list);
 606                 kfree(entry);
 607         }
 608         mutex_unlock(&mvm->mutex);
 609 }
 610
 611 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 612                                struct iwl_rx_cmd_buffer *rxb,
 613                                struct iwl_device_cmd *cmd)
 614 {
 615         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 616         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 617         u8 i;
 618
 619         /*
 620          * Do the notification wait before RX handlers so
 621          * even if the RX handler consumes the RXB we have
 622          * access to it in the notification wait entry.
 623          */
 624         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 625
 626         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 627                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 628                 struct iwl_async_handler_entry *entry;
 629
 630                 if (rx_h->cmd_id != pkt->hdr.cmd)
 631                         continue;
 632
 633                 if (!rx_h->async)
 634                         return rx_h->fn(mvm, rxb, cmd);
 635
 636                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 637                 /* we can't do much... */
 638                 if (!entry)
 639                         return 0;
 640
 641                 entry->rxb._page = rxb_steal_page(rxb);
 642                 entry->rxb._offset = rxb->_offset;
 643                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 644                 entry->fn = rx_h->fn;
 645                 spin_lock(&mvm->async_handlers_lock);
 646                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 647                 spin_unlock(&mvm->async_handlers_lock);
 648                 schedule_work(&mvm->async_handlers_wk);
 649                 break;
 650         }
 651
 652         return 0;
 653 }
 654
 655 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 656 {
 657         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 658         int mq = mvm->queue_to_mac80211[queue];
 659
 660         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 661                 return;
 662
 663         if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
 664                 IWL_DEBUG_TX_QUEUES(mvm,
 665                                     "queue %d (mac80211 %d) already stopped\n",
 666                                     queue, mq);
 667                 return;
 668         }
 669
 670         set_bit(mq, &mvm->transport_queue_stop);
 671         ieee80211_stop_queue(mvm->hw, mq);
 672 }
 673
 674 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 675 {
 676         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 677         int mq = mvm->queue_to_mac80211[queue];
 678
 679         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 680                 return;
 681
 682         if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
 683                 IWL_DEBUG_TX_QUEUES(mvm,
 684                                     "queue %d (mac80211 %d) already awake\n",
 685                                     queue, mq);
 686                 return;
 687         }
 688
 689         clear_bit(mq, &mvm->transport_queue_stop);
 690
 691         ieee80211_wake_queue(mvm->hw, mq);
 692 }
 693
 694 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 695 {
 696         if (state)
 697                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 698         else
 699                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 700
 701         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 702 }
 703
 704 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 705 {
 706         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 707
 708         if (state)
 709                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 710         else
 711                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 712
 713         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 714
 715         return state && mvm->cur_ucode != IWL_UCODE_INIT;
 716 }
 717
 718 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 719 {
 720         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 721         struct ieee80211_tx_info *info;
 722
 723         info = IEEE80211_SKB_CB(skb);
 724         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 725         ieee80211_free_txskb(mvm->hw, skb);
 726 }
 727
 728 struct iwl_mvm_reprobe {
 729         struct device *dev;
 730         struct work_struct work;
 731 };
 732
 733 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 734 {
 735         struct iwl_mvm_reprobe *reprobe;
 736
 737         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 738         if (device_reprobe(reprobe->dev))
 739                 dev_err(reprobe->dev, "reprobe failed!\n");
 740         kfree(reprobe);
 741         module_put(THIS_MODULE);
 742 }
 743
 744 static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
 745 {
 746         iwl_abort_notification_waits(&mvm->notif_wait);
 747
 748         /*
 749          * This is a bit racy, but worst case we tell mac80211 about
 750          * a stopped/aborted scan when that was already done which
 751          * is not a problem. It is necessary to abort any os scan
 752          * here because mac80211 requires having the scan cleared
 753          * before restarting.
 754          * We'll reset the scan_status to NONE in restart cleanup in
 755          * the next start() call from mac80211. If restart isn't called
 756          * (no fw restart) scan status will stay busy.
 757          */
 758         switch (mvm->scan_status) {
 759         case IWL_MVM_SCAN_NONE:
 760                 break;
 761         case IWL_MVM_SCAN_OS:
 762                 ieee80211_scan_completed(mvm->hw, true);
 763                 break;
 764         case IWL_MVM_SCAN_SCHED:
 765                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 766                 if (!mvm->restart_fw)
 767                         ieee80211_sched_scan_stopped(mvm->hw);
 768                 break;
 769         }
 770
 771         /*
 772          * If we're restarting already, don't cycle restarts.
 773          * If INIT fw asserted, it will likely fail again.
 774          * If WoWLAN fw asserted, don't restart either, mac80211
 775          * can't recover this since we're already half suspended.
 776          */
 777         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 778                 struct iwl_mvm_reprobe *reprobe;
 779
 780                 IWL_ERR(mvm,
 781                         "Firmware error during reconfiguration - reprobe!\n");
 782
 783                 /*
 784                  * get a module reference to avoid doing this while unloading
 785                  * anyway and to avoid scheduling a work with code that's
 786                  * being removed.
 787                  */
 788                 if (!try_module_get(THIS_MODULE)) {
 789                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 790                         return;
 791                 }
 792
 793                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 794                 if (!reprobe) {
 795                         module_put(THIS_MODULE);
 796                         return;
 797                 }
 798                 reprobe->dev = mvm->trans->dev;
 799                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 800                 schedule_work(&reprobe->work);
 801         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
 802                 /* don't let the transport/FW power down */
 803                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 804
 805                 if (mvm->restart_fw > 0)
 806                         mvm->restart_fw--;
 807                 ieee80211_restart_hw(mvm->hw);
 808         }
 809 }
 810
 811 #ifdef CONFIG_IWLWIFI_DEBUGFS
 812 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 813 {
 814         struct iwl_fw_error_dump_file *dump_file;
 815         struct iwl_fw_error_dump_data *dump_data;
 816         u32 file_len;
 817
 818         lockdep_assert_held(&mvm->mutex);
 819
 820         if (mvm->fw_error_dump)
 821                 return;
 822
 823         file_len = mvm->fw_error_sram_len +
 824                    sizeof(*dump_file) +
 825                    sizeof(*dump_data);
 826
 827         dump_file = vmalloc(file_len);
 828         if (!dump_file)
 829                 return;
 830
 831         mvm->fw_error_dump = dump_file;
 832
 833         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 834         dump_file->file_len = cpu_to_le32(file_len);
 835         dump_data = (void *)dump_file->data;
 836         dump_data->type = IWL_FW_ERROR_DUMP_SRAM;
 837         dump_data->len = cpu_to_le32(mvm->fw_error_sram_len);
 838
 839         /*
 840          * No need for lock since at the stage the FW isn't loaded. So it
 841          * can't assert - we are the only one who can possibly be accessing
 842          * mvm->fw_error_sram right now.
 843          */
 844         memcpy(dump_data->data, mvm->fw_error_sram, mvm->fw_error_sram_len);
 845 }
 846 #endif
 847
 848 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 849 {
 850         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 851
 852         iwl_mvm_dump_nic_error_log(mvm);
 853
 854 #ifdef CONFIG_IWLWIFI_DEBUGFS
 855         iwl_mvm_fw_error_sram_dump(mvm);
 856 #endif
 857
 858         iwl_mvm_nic_restart(mvm);
 859 }
 860
 861 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 862 {
 863         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 864
 865         WARN_ON(1);
 866         iwl_mvm_nic_restart(mvm);
 867 }
 868
 869 struct iwl_d0i3_iter_data {
 870         struct iwl_mvm *mvm;
 871         u8 ap_sta_id;
 872         u8 vif_count;
 873         u8 offloading_tid;
 874         bool disable_offloading;
 875 };
 876
 877 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 878                                         struct ieee80211_vif *vif,
 879                                         struct iwl_d0i3_iter_data *iter_data)
 880 {
 881         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 882         struct ieee80211_sta *ap_sta;
 883         struct iwl_mvm_sta *mvmsta;
 884         u32 available_tids = 0;
 885         u8 tid;
 886
 887         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 888                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 889                 return false;
 890
 891         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 892         if (IS_ERR_OR_NULL(ap_sta))
 893                 return false;
 894
 895         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 896         spin_lock_bh(&mvmsta->lock);
 897         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 898                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 899
 900                 /*
 901                  * in case of pending tx packets, don't use this tid
 902                  * for offloading in order to prevent reuse of the same
 903                  * qos seq counters.
 904                  */
 905                 if (iwl_mvm_tid_queued(tid_data))
 906                         continue;
 907
 908                 if (tid_data->state != IWL_AGG_OFF)
 909                         continue;
 910
 911                 available_tids |= BIT(tid);
 912         }
 913         spin_unlock_bh(&mvmsta->lock);
 914
 915         /*
 916          * disallow protocol offloading if we have no available tid
 917          * (with no pending frames and no active aggregation,
 918          * as we don't handle "holes" properly - the scheduler needs the
 919          * frame's seq number and TFD index to match)
 920          */
 921         if (!available_tids)
 922                 return true;
 923
 924         /* for simplicity, just use the first available tid */
 925         iter_data->offloading_tid = ffs(available_tids) - 1;
 926         return false;
 927 }
 928
 929 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 930                                         struct ieee80211_vif *vif)
 931 {
 932         struct iwl_d0i3_iter_data *data = _data;
 933         struct iwl_mvm *mvm = data->mvm;
 934         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 935         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 936
 937         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 938         if (vif->type != NL80211_IFTYPE_STATION ||
 939             !vif->bss_conf.assoc)
 940                 return;
 941
 942         /*
 943          * in case of pending tx packets or active aggregations,
 944          * avoid offloading features in order to prevent reuse of
 945          * the same qos seq counters.
 946          */
 947         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 948                 data->disable_offloading = true;
 949
 950         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 951         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 952
 953         /*
 954          * on init/association, mvm already configures POWER_TABLE_CMD
 955          * and REPLY_MCAST_FILTER_CMD, so currently don't
 956          * reconfigure them (we might want to use different
 957          * params later on, though).
 958          */
 959         data->ap_sta_id = mvmvif->ap_sta_id;
 960         data->vif_count++;
 961 }
 962
 963 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
 964                                     struct iwl_wowlan_config_cmd_v3 *cmd,
 965                                     struct iwl_d0i3_iter_data *iter_data)
 966 {
 967         struct ieee80211_sta *ap_sta;
 968         struct iwl_mvm_sta *mvm_ap_sta;
 969
 970         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
 971                 return;
 972
 973         rcu_read_lock();
 974
 975         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
 976         if (IS_ERR_OR_NULL(ap_sta))
 977                 goto out;
 978
 979         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 980         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
 981         cmd->offloading_tid = iter_data->offloading_tid;
 982
 983         /*
 984          * The d0i3 uCode takes care of the nonqos counters,
 985          * so configure only the qos seq ones.
 986          */
 987         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
 988 out:
 989         rcu_read_unlock();
 990 }
 991 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
 992 {
 993         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 994         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 995         int ret;
 996         struct iwl_d0i3_iter_data d0i3_iter_data = {
 997                 .mvm = mvm,
 998         };
 999         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1000                 .common = {
1001                         .wakeup_filter =
1002                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1003                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
1004                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1005                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1006                 },
1007         };
1008         struct iwl_d3_manager_config d3_cfg_cmd = {
1009                 .min_sleep_time = cpu_to_le32(1000),
1010         };
1011
1012         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1013
1014         /* make sure we have no running tx while configuring the qos */
1015         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1016         synchronize_net();
1017
1018         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1019                                                    IEEE80211_IFACE_ITER_NORMAL,
1020                                                    iwl_mvm_enter_d0i3_iterator,
1021                                                    &d0i3_iter_data);
1022         if (d0i3_iter_data.vif_count == 1) {
1023                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1024                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1025         } else {
1026                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1027                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1028                 mvm->d0i3_offloading = false;
1029         }
1030
1031         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1032         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1033                                    sizeof(wowlan_config_cmd),
1034                                    &wowlan_config_cmd);
1035         if (ret)
1036                 return ret;
1037
1038         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1039                                     flags | CMD_MAKE_TRANS_IDLE,
1040                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1041 }
1042
1043 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1044                                        struct ieee80211_vif *vif)
1045 {
1046         struct iwl_mvm *mvm = _data;
1047         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1048
1049         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1050         if (vif->type != NL80211_IFTYPE_STATION ||
1051             !vif->bss_conf.assoc)
1052                 return;
1053
1054         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1055 }
1056
1057 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1058                                          struct ieee80211_vif *vif)
1059 {
1060         struct iwl_mvm *mvm = data;
1061         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1062
1063         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1064             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1065                 ieee80211_connection_loss(vif);
1066 }
1067
1068 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1069 {
1070         struct ieee80211_sta *sta = NULL;
1071         struct iwl_mvm_sta *mvm_ap_sta;
1072         int i;
1073         bool wake_queues = false;
1074
1075         lockdep_assert_held(&mvm->mutex);
1076
1077         spin_lock_bh(&mvm->d0i3_tx_lock);
1078
1079         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1080                 goto out;
1081
1082         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1083
1084         /* get the sta in order to update seq numbers and re-enqueue skbs */
1085         sta = rcu_dereference_protected(
1086                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1087                         lockdep_is_held(&mvm->mutex));
1088
1089         if (IS_ERR_OR_NULL(sta)) {
1090                 sta = NULL;
1091                 goto out;
1092         }
1093
1094         if (mvm->d0i3_offloading && qos_seq) {
1095                 /* update qos seq numbers if offloading was enabled */
1096                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1097                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1098                         u16 seq = le16_to_cpu(qos_seq[i]);
1099                         /* firmware stores last-used one, we store next one */
1100                         seq += 0x10;
1101                         mvm_ap_sta->tid_data[i].seq_number = seq;
1102                 }
1103         }
1104 out:
1105         /* re-enqueue (or drop) all packets */
1106         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1107                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1108
1109                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1110                         ieee80211_free_txskb(mvm->hw, skb);
1111
1112                 /* if the skb_queue is not empty, we need to wake queues */
1113                 wake_queues = true;
1114         }
1115         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1116         wake_up(&mvm->d0i3_exit_waitq);
1117         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1118         if (wake_queues)
1119                 ieee80211_wake_queues(mvm->hw);
1120
1121         spin_unlock_bh(&mvm->d0i3_tx_lock);
1122 }
1123
1124 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1125 {
1126         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1127         struct iwl_host_cmd get_status_cmd = {
1128                 .id = WOWLAN_GET_STATUSES,
1129                 .flags = CMD_SYNC | CMD_HIGH_PRIO | CMD_WANT_SKB,
1130         };
1131         struct iwl_wowlan_status_v6 *status;
1132         int ret;
1133         u32 disconnection_reasons, wakeup_reasons;
1134         __le16 *qos_seq = NULL;
1135
1136         mutex_lock(&mvm->mutex);
1137         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1138         if (ret)
1139                 goto out;
1140
1141         if (!get_status_cmd.resp_pkt)
1142                 goto out;
1143
1144         status = (void *)get_status_cmd.resp_pkt->data;
1145         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1146         qos_seq = status->qos_seq_ctr;
1147
1148         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1149
1150         disconnection_reasons =
1151                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1152                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1153         if (wakeup_reasons & disconnection_reasons)
1154                 ieee80211_iterate_active_interfaces(
1155                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1156                         iwl_mvm_d0i3_disconnect_iter, mvm);
1157
1158         iwl_free_resp(&get_status_cmd);
1159 out:
1160         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1161         mutex_unlock(&mvm->mutex);
1162 }
1163
1164 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1165 {
1166         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1167         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1168                     CMD_WAKE_UP_TRANS;
1169         int ret;
1170
1171         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1172
1173         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1174         if (ret)
1175                 goto out;
1176
1177         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1178                                                    IEEE80211_IFACE_ITER_NORMAL,
1179                                                    iwl_mvm_exit_d0i3_iterator,
1180                                                    mvm);
1181 out:
1182         schedule_work(&mvm->d0i3_exit_work);
1183         return ret;
1184 }
1185
1186 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1187                              struct napi_struct *napi,
1188                              struct net_device *napi_dev,
1189                              int (*poll)(struct napi_struct *, int),
1190                              int weight)
1191 {
1192         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1193
1194         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1195 }
1196
1197 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1198         .start = iwl_op_mode_mvm_start,
1199         .stop = iwl_op_mode_mvm_stop,
1200         .rx = iwl_mvm_rx_dispatch,
1201         .queue_full = iwl_mvm_stop_sw_queue,
1202         .queue_not_full = iwl_mvm_wake_sw_queue,
1203         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1204         .free_skb = iwl_mvm_free_skb,
1205         .nic_error = iwl_mvm_nic_error,
1206         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1207         .nic_config = iwl_mvm_nic_config,
1208         .enter_d0i3 = iwl_mvm_enter_d0i3,
1209         .exit_d0i3 = iwl_mvm_exit_d0i3,
1210         .napi_add = iwl_mvm_napi_add,
1211 };