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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/module.h>
  66 #include <linux/vmalloc.h>
  67 #include <net/mac80211.h>
  68
  69 #include "iwl-notif-wait.h"
  70 #include "iwl-trans.h"
  71 #include "iwl-op-mode.h"
  72 #include "iwl-fw.h"
  73 #include "iwl-debug.h"
  74 #include "iwl-drv.h"
  75 #include "iwl-modparams.h"
  76 #include "mvm.h"
  77 #include "iwl-phy-db.h"
  78 #include "iwl-eeprom-parse.h"
  79 #include "iwl-csr.h"
  80 #include "iwl-io.h"
  81 #include "iwl-prph.h"
  82 #include "rs.h"
  83 #include "fw-api-scan.h"
  84 #include "time-event.h"
  85 #include "iwl-fw-error-dump.h"
  86
  87 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  88 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  89 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  90 MODULE_LICENSE("GPL");
  91
  92 static const struct iwl_op_mode_ops iwl_mvm_ops;
  93
  94 struct iwl_mvm_mod_params iwlmvm_mod_params = {
  95         .power_scheme = IWL_POWER_SCHEME_BPS,
  96         /* rest of fields are 0 by default */
  97 };
  98
  99 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 100 MODULE_PARM_DESC(init_dbg,
 101                  "set to true to debug an ASSERT in INIT fw (default: false");
 102 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 103 MODULE_PARM_DESC(power_scheme,
 104                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 105
 106 /*
 107  * module init and exit functions
 108  */
 109 static int __init iwl_mvm_init(void)
 110 {
 111         int ret;
 112
 113         ret = iwl_mvm_rate_control_register();
 114         if (ret) {
 115                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 116                 return ret;
 117         }
 118
 119         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 120
 121         if (ret) {
 122                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 123                 iwl_mvm_rate_control_unregister();
 124         }
 125
 126         return ret;
 127 }
 128 module_init(iwl_mvm_init);
 129
 130 static void __exit iwl_mvm_exit(void)
 131 {
 132         iwl_opmode_deregister("iwlmvm");
 133         iwl_mvm_rate_control_unregister();
 134 }
 135 module_exit(iwl_mvm_exit);
 136
 137 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 138 {
 139         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 140         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 141         u32 reg_val = 0;
 142         u32 phy_config = iwl_mvm_get_phy_config(mvm);
 143
 144         radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 145                          FW_PHY_CFG_RADIO_TYPE_POS;
 146         radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
 147                          FW_PHY_CFG_RADIO_STEP_POS;
 148         radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
 149                          FW_PHY_CFG_RADIO_DASH_POS;
 150
 151         /* SKU control */
 152         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 153                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 154         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 155                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 156
 157         /* radio configuration */
 158         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 159         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 160         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 161
 162         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 163                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 164
 165         /*
 166          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 167          * shouldn't be set to any non-zero value. The same is supposed to be
 168          * true of the other HW, but unsetting them (such as the 7260) causes
 169          * automatic tests to fail on seemingly unrelated errors. Need to
 170          * further investigate this, but for now we'll separate cases.
 171          */
 172         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 173                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 174
 175         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 176                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 177                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 178                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 179                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 180                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 181                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 182                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 183                                 reg_val);
 184
 185         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 186                        radio_cfg_step, radio_cfg_dash);
 187
 188         /*
 189          * W/A : NIC is stuck in a reset state after Early PCIe power off
 190          * (PCIe power is lost before PERST# is asserted), causing ME FW
 191          * to lose ownership and not being able to obtain it back.
 192          */
 193         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 194                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 195                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 196                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 197 }
 198
 199 struct iwl_rx_handlers {
 200         u8 cmd_id;
 201         bool async;
 202         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 203                   struct iwl_device_cmd *cmd);
 204 };
 205
 206 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 207         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 208
 209 /*
 210  * Handlers for fw notifications
 211  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 212  * This list should be in order of frequency for performance purposes.
 213  *
 214  * The handler can be SYNC - this means that it will be called in the Rx path
 215  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 216  * only in this case!), it should be set as ASYNC. In that case, it will be
 217  * called from a worker with mvm->mutex held.
 218  */
 219 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 220         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 221         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 222         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 223         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 224
 225         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 226         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 227         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 228         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 229                    iwl_mvm_rx_ant_coupling_notif, true),
 230
 231         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 232
 233         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 234
 235         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 236         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 237         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 238                    iwl_mvm_rx_scan_offload_complete_notif, true),
 239         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
 240                    false),
 241         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 242                    true),
 243
 244         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 245         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 246
 247         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 248                    false),
 249
 250         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 251         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 252                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 253         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 254
 255         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 256                    true),
 257         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 258
 259 };
 260 #undef RX_HANDLER
 261 #define CMD(x) [x] = #x
 262
 263 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 264         CMD(MVM_ALIVE),
 265         CMD(REPLY_ERROR),
 266         CMD(INIT_COMPLETE_NOTIF),
 267         CMD(PHY_CONTEXT_CMD),
 268         CMD(MGMT_MCAST_KEY),
 269         CMD(TX_CMD),
 270         CMD(TXPATH_FLUSH),
 271         CMD(MAC_CONTEXT_CMD),
 272         CMD(TIME_EVENT_CMD),
 273         CMD(TIME_EVENT_NOTIFICATION),
 274         CMD(BINDING_CONTEXT_CMD),
 275         CMD(TIME_QUOTA_CMD),
 276         CMD(NON_QOS_TX_COUNTER_CMD),
 277         CMD(RADIO_VERSION_NOTIFICATION),
 278         CMD(SCAN_REQUEST_CMD),
 279         CMD(SCAN_ABORT_CMD),
 280         CMD(SCAN_START_NOTIFICATION),
 281         CMD(SCAN_RESULTS_NOTIFICATION),
 282         CMD(SCAN_COMPLETE_NOTIFICATION),
 283         CMD(NVM_ACCESS_CMD),
 284         CMD(PHY_CONFIGURATION_CMD),
 285         CMD(CALIB_RES_NOTIF_PHY_DB),
 286         CMD(SET_CALIB_DEFAULT_CMD),
 287         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 288         CMD(ADD_STA_KEY),
 289         CMD(ADD_STA),
 290         CMD(REMOVE_STA),
 291         CMD(LQ_CMD),
 292         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 293         CMD(MATCH_FOUND_NOTIFICATION),
 294         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 295         CMD(SCAN_OFFLOAD_ABORT_CMD),
 296         CMD(HOT_SPOT_CMD),
 297         CMD(SCAN_OFFLOAD_COMPLETE),
 298         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 299         CMD(SCAN_ITERATION_COMPLETE),
 300         CMD(POWER_TABLE_CMD),
 301         CMD(WEP_KEY),
 302         CMD(REPLY_RX_PHY_CMD),
 303         CMD(REPLY_RX_MPDU_CMD),
 304         CMD(BEACON_NOTIFICATION),
 305         CMD(BEACON_TEMPLATE_CMD),
 306         CMD(STATISTICS_NOTIFICATION),
 307         CMD(EOSP_NOTIFICATION),
 308         CMD(REDUCE_TX_POWER_CMD),
 309         CMD(TX_ANT_CONFIGURATION_CMD),
 310         CMD(D3_CONFIG_CMD),
 311         CMD(D0I3_END_CMD),
 312         CMD(PROT_OFFLOAD_CONFIG_CMD),
 313         CMD(OFFLOADS_QUERY_CMD),
 314         CMD(REMOTE_WAKE_CONFIG_CMD),
 315         CMD(WOWLAN_PATTERNS),
 316         CMD(WOWLAN_CONFIGURATION),
 317         CMD(WOWLAN_TSC_RSC_PARAM),
 318         CMD(WOWLAN_TKIP_PARAM),
 319         CMD(WOWLAN_KEK_KCK_MATERIAL),
 320         CMD(WOWLAN_GET_STATUSES),
 321         CMD(WOWLAN_TX_POWER_PER_DB),
 322         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 323         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 324         CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
 325         CMD(CARD_STATE_NOTIFICATION),
 326         CMD(MISSED_BEACONS_NOTIFICATION),
 327         CMD(BT_COEX_PRIO_TABLE),
 328         CMD(BT_COEX_PROT_ENV),
 329         CMD(BT_PROFILE_NOTIFICATION),
 330         CMD(BT_CONFIG),
 331         CMD(MCAST_FILTER_CMD),
 332         CMD(BCAST_FILTER_CMD),
 333         CMD(REPLY_SF_CFG_CMD),
 334         CMD(REPLY_BEACON_FILTERING_CMD),
 335         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 336         CMD(DTS_MEASUREMENT_NOTIFICATION),
 337         CMD(REPLY_THERMAL_MNG_BACKOFF),
 338         CMD(MAC_PM_POWER_TABLE),
 339         CMD(LTR_CONFIG),
 340         CMD(BT_COEX_CI),
 341         CMD(BT_COEX_UPDATE_SW_BOOST),
 342         CMD(BT_COEX_UPDATE_CORUN_LUT),
 343         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 344         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 345         CMD(ANTENNA_COUPLING_NOTIFICATION),
 346         CMD(SCD_QUEUE_CFG),
 347         CMD(SCAN_CFG_CMD),
 348         CMD(SCAN_REQ_UMAC),
 349         CMD(SCAN_ABORT_UMAC),
 350         CMD(SCAN_COMPLETE_UMAC),
 351         CMD(TDLS_CHANNEL_SWITCH_CMD),
 352         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 353         CMD(TDLS_CONFIG_CMD),
 354 };
 355 #undef CMD
 356
 357 /* this forward declaration can avoid to export the function */
 358 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 359 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 360
 361 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 362 {
 363         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 364
 365         if (!pwr_tx_backoff)
 366                 return 0;
 367
 368         while (pwr_tx_backoff->pwr) {
 369                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 370                         return pwr_tx_backoff->backoff;
 371
 372                 pwr_tx_backoff++;
 373         }
 374
 375         return 0;
 376 }
 377
 378 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 379
 380 static struct iwl_op_mode *
 381 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 382                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 383 {
 384         struct ieee80211_hw *hw;
 385         struct iwl_op_mode *op_mode;
 386         struct iwl_mvm *mvm;
 387         struct iwl_trans_config trans_cfg = {};
 388         static const u8 no_reclaim_cmds[] = {
 389                 TX_CMD,
 390         };
 391         int err, scan_size;
 392         u32 min_backoff;
 393
 394         /*
 395          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 396          * index all over the driver - check that its value corresponds to the
 397          * array size.
 398          */
 399         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 400
 401         /********************************
 402          * 1. Allocating and configuring HW data
 403          ********************************/
 404         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 405                                 sizeof(struct iwl_mvm),
 406                                 &iwl_mvm_hw_ops);
 407         if (!hw)
 408                 return NULL;
 409
 410         if (cfg->max_rx_agg_size)
 411                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 412
 413         if (cfg->max_tx_agg_size)
 414                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 415
 416         op_mode = hw->priv;
 417         op_mode->ops = &iwl_mvm_ops;
 418
 419         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 420         mvm->dev = trans->dev;
 421         mvm->trans = trans;
 422         mvm->cfg = cfg;
 423         mvm->fw = fw;
 424         mvm->hw = hw;
 425
 426         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 427
 428         mvm->aux_queue = 15;
 429         mvm->first_agg_queue = 16;
 430         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 431         if (mvm->cfg->base_params->num_of_queues == 16) {
 432                 mvm->aux_queue = 11;
 433                 mvm->first_agg_queue = 12;
 434         }
 435         mvm->sf_state = SF_UNINIT;
 436         mvm->low_latency_agg_frame_limit = 6;
 437         mvm->cur_ucode = IWL_UCODE_INIT;
 438
 439         mutex_init(&mvm->mutex);
 440         mutex_init(&mvm->d0i3_suspend_mutex);
 441         spin_lock_init(&mvm->async_handlers_lock);
 442         INIT_LIST_HEAD(&mvm->time_event_list);
 443         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 444         INIT_LIST_HEAD(&mvm->async_handlers_list);
 445         spin_lock_init(&mvm->time_event_lock);
 446
 447         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 448         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 449         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 450         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 451         INIT_WORK(&mvm->fw_error_dump_wk, iwl_mvm_fw_error_dump_wk);
 452         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
 453
 454         spin_lock_init(&mvm->d0i3_tx_lock);
 455         spin_lock_init(&mvm->refs_lock);
 456         skb_queue_head_init(&mvm->d0i3_tx);
 457         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 458
 459         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 460
 461         /*
 462          * Populate the state variables that the transport layer needs
 463          * to know about.
 464          */
 465         trans_cfg.op_mode = op_mode;
 466         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 467         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 468         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 469
 470         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 471                 trans_cfg.bc_table_dword = true;
 472
 473         if (!iwlwifi_mod_params.wd_disable)
 474                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 475         else
 476                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 477
 478         trans_cfg.command_names = iwl_mvm_cmd_strings;
 479
 480         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 481         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 482         trans_cfg.scd_set_active = true;
 483
 484         snprintf(mvm->hw->wiphy->fw_version,
 485                  sizeof(mvm->hw->wiphy->fw_version),
 486                  "%s", fw->fw_version);
 487
 488         /* Configure transport layer */
 489         iwl_trans_configure(mvm->trans, &trans_cfg);
 490
 491         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 492         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 493         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 494         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 495         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 496                sizeof(trans->dbg_conf_tlv));
 497
 498         /* set up notification wait support */
 499         iwl_notification_wait_init(&mvm->notif_wait);
 500
 501         /* Init phy db */
 502         mvm->phy_db = iwl_phy_db_init(trans);
 503         if (!mvm->phy_db) {
 504                 IWL_ERR(mvm, "Cannot init phy_db\n");
 505                 goto out_free;
 506         }
 507
 508         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 509                  mvm->cfg->name, mvm->trans->hw_rev);
 510
 511         min_backoff = calc_min_backoff(trans, cfg);
 512         iwl_mvm_tt_initialize(mvm, min_backoff);
 513         /* set the nvm_file_name according to priority */
 514         if (iwlwifi_mod_params.nvm_file)
 515                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 516         else
 517                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 518
 519         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 520                  "not allowing power-up and not having nvm_file\n"))
 521                 goto out_free;
 522
 523         /*
 524          * Even if nvm exists in the nvm_file driver should read again the nvm
 525          * from the nic because there might be entries that exist in the OTP
 526          * and not in the file.
 527          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 528          */
 529         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 530                 err = iwl_nvm_init(mvm, false);
 531                 if (err)
 532                         goto out_free;
 533         } else {
 534                 err = iwl_trans_start_hw(mvm->trans);
 535                 if (err)
 536                         goto out_free;
 537
 538                 mutex_lock(&mvm->mutex);
 539                 err = iwl_run_init_mvm_ucode(mvm, true);
 540                 if (!err || !iwlmvm_mod_params.init_dbg)
 541                         iwl_trans_stop_device(trans);
 542                 mutex_unlock(&mvm->mutex);
 543                 /* returns 0 if successful, 1 if success but in rfkill */
 544                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 545                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 546                         goto out_free;
 547                 }
 548         }
 549
 550         scan_size = iwl_mvm_scan_size(mvm);
 551
 552         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 553         if (!mvm->scan_cmd)
 554                 goto out_free;
 555
 556         err = iwl_mvm_mac_setup_register(mvm);
 557         if (err)
 558                 goto out_free;
 559
 560         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 561         if (err)
 562                 goto out_unregister;
 563
 564         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 565
 566         /* rpm starts with a taken ref. only set the appropriate bit here. */
 567         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 568
 569         return op_mode;
 570
 571  out_unregister:
 572         ieee80211_unregister_hw(mvm->hw);
 573         iwl_mvm_leds_exit(mvm);
 574  out_free:
 575         iwl_phy_db_free(mvm->phy_db);
 576         kfree(mvm->scan_cmd);
 577         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 578                 iwl_trans_op_mode_leave(trans);
 579         ieee80211_free_hw(mvm->hw);
 580         return NULL;
 581 }
 582
 583 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 584 {
 585         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 586         int i;
 587
 588         iwl_mvm_leds_exit(mvm);
 589
 590         iwl_mvm_tt_exit(mvm);
 591
 592         ieee80211_unregister_hw(mvm->hw);
 593
 594         kfree(mvm->scan_cmd);
 595         kfree(mvm->mcast_filter_cmd);
 596         mvm->mcast_filter_cmd = NULL;
 597
 598 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 599         kfree(mvm->d3_resume_sram);
 600         if (mvm->nd_config) {
 601                 kfree(mvm->nd_config->match_sets);
 602                 kfree(mvm->nd_config);
 603                 mvm->nd_config = NULL;
 604         }
 605 #endif
 606
 607         iwl_trans_op_mode_leave(mvm->trans);
 608
 609         iwl_phy_db_free(mvm->phy_db);
 610         mvm->phy_db = NULL;
 611
 612         iwl_free_nvm_data(mvm->nvm_data);
 613         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 614                 kfree(mvm->nvm_sections[i].data);
 615
 616         ieee80211_free_hw(mvm->hw);
 617 }
 618
 619 struct iwl_async_handler_entry {
 620         struct list_head list;
 621         struct iwl_rx_cmd_buffer rxb;
 622         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 623                   struct iwl_device_cmd *cmd);
 624 };
 625
 626 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 627 {
 628         struct iwl_async_handler_entry *entry, *tmp;
 629
 630         spin_lock_bh(&mvm->async_handlers_lock);
 631         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 632                 iwl_free_rxb(&entry->rxb);
 633                 list_del(&entry->list);
 634                 kfree(entry);
 635         }
 636         spin_unlock_bh(&mvm->async_handlers_lock);
 637 }
 638
 639 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 640 {
 641         struct iwl_mvm *mvm =
 642                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 643         struct iwl_async_handler_entry *entry, *tmp;
 644         struct list_head local_list;
 645
 646         INIT_LIST_HEAD(&local_list);
 647
 648         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 649         mutex_lock(&mvm->mutex);
 650
 651         /*
 652          * Sync with Rx path with a lock. Remove all the entries from this list,
 653          * add them to a local one (lock free), and then handle them.
 654          */
 655         spin_lock_bh(&mvm->async_handlers_lock);
 656         list_splice_init(&mvm->async_handlers_list, &local_list);
 657         spin_unlock_bh(&mvm->async_handlers_lock);
 658
 659         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 660                 if (entry->fn(mvm, &entry->rxb, NULL))
 661                         IWL_WARN(mvm,
 662                                  "returned value from ASYNC handlers are ignored\n");
 663                 iwl_free_rxb(&entry->rxb);
 664                 list_del(&entry->list);
 665                 kfree(entry);
 666         }
 667         mutex_unlock(&mvm->mutex);
 668 }
 669
 670 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 671                                struct iwl_rx_cmd_buffer *rxb,
 672                                struct iwl_device_cmd *cmd)
 673 {
 674         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 675         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 676         u8 i;
 677
 678         /*
 679          * Do the notification wait before RX handlers so
 680          * even if the RX handler consumes the RXB we have
 681          * access to it in the notification wait entry.
 682          */
 683         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 684
 685         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 686                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 687                 struct iwl_async_handler_entry *entry;
 688
 689                 if (rx_h->cmd_id != pkt->hdr.cmd)
 690                         continue;
 691
 692                 if (!rx_h->async)
 693                         return rx_h->fn(mvm, rxb, cmd);
 694
 695                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 696                 /* we can't do much... */
 697                 if (!entry)
 698                         return 0;
 699
 700                 entry->rxb._page = rxb_steal_page(rxb);
 701                 entry->rxb._offset = rxb->_offset;
 702                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 703                 entry->fn = rx_h->fn;
 704                 spin_lock(&mvm->async_handlers_lock);
 705                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 706                 spin_unlock(&mvm->async_handlers_lock);
 707                 schedule_work(&mvm->async_handlers_wk);
 708                 break;
 709         }
 710
 711         return 0;
 712 }
 713
 714 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 715 {
 716         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 717         int mq = mvm->queue_to_mac80211[queue];
 718
 719         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 720                 return;
 721
 722         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 723                 IWL_DEBUG_TX_QUEUES(mvm,
 724                                     "queue %d (mac80211 %d) already stopped\n",
 725                                     queue, mq);
 726                 return;
 727         }
 728
 729         ieee80211_stop_queue(mvm->hw, mq);
 730 }
 731
 732 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 733 {
 734         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 735         int mq = mvm->queue_to_mac80211[queue];
 736
 737         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 738                 return;
 739
 740         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 741                 IWL_DEBUG_TX_QUEUES(mvm,
 742                                     "queue %d (mac80211 %d) still stopped\n",
 743                                     queue, mq);
 744                 return;
 745         }
 746
 747         ieee80211_wake_queue(mvm->hw, mq);
 748 }
 749
 750 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 751 {
 752         if (state)
 753                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 754         else
 755                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 756
 757         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 758 }
 759
 760 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 761 {
 762         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 763         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 764
 765         if (state)
 766                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 767         else
 768                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 769
 770         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 771
 772         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 773         if (calibrating)
 774                 iwl_abort_notification_waits(&mvm->notif_wait);
 775
 776         /*
 777          * Stop the device if we run OPERATIONAL firmware or if we are in the
 778          * middle of the calibrations.
 779          */
 780         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 781 }
 782
 783 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 784 {
 785         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 786         struct ieee80211_tx_info *info;
 787
 788         info = IEEE80211_SKB_CB(skb);
 789         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 790         ieee80211_free_txskb(mvm->hw, skb);
 791 }
 792
 793 struct iwl_mvm_reprobe {
 794         struct device *dev;
 795         struct work_struct work;
 796 };
 797
 798 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 799 {
 800         struct iwl_mvm_reprobe *reprobe;
 801
 802         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 803         if (device_reprobe(reprobe->dev))
 804                 dev_err(reprobe->dev, "reprobe failed!\n");
 805         kfree(reprobe);
 806         module_put(THIS_MODULE);
 807 }
 808
 809 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 810 {
 811         struct iwl_mvm *mvm =
 812                 container_of(work, struct iwl_mvm, fw_error_dump_wk);
 813
 814         mutex_lock(&mvm->mutex);
 815         iwl_mvm_fw_error_dump(mvm);
 816         mutex_unlock(&mvm->mutex);
 817 }
 818
 819 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 820 {
 821         iwl_abort_notification_waits(&mvm->notif_wait);
 822
 823         /*
 824          * This is a bit racy, but worst case we tell mac80211 about
 825          * a stopped/aborted scan when that was already done which
 826          * is not a problem. It is necessary to abort any os scan
 827          * here because mac80211 requires having the scan cleared
 828          * before restarting.
 829          * We'll reset the scan_status to NONE in restart cleanup in
 830          * the next start() call from mac80211. If restart isn't called
 831          * (no fw restart) scan status will stay busy.
 832          */
 833         switch (mvm->scan_status) {
 834         case IWL_MVM_SCAN_NONE:
 835                 break;
 836         case IWL_MVM_SCAN_OS:
 837                 ieee80211_scan_completed(mvm->hw, true);
 838                 break;
 839         case IWL_MVM_SCAN_SCHED:
 840                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 841                 if (!mvm->restart_fw)
 842                         ieee80211_sched_scan_stopped(mvm->hw);
 843                 break;
 844         }
 845
 846         /*
 847          * If we're restarting already, don't cycle restarts.
 848          * If INIT fw asserted, it will likely fail again.
 849          * If WoWLAN fw asserted, don't restart either, mac80211
 850          * can't recover this since we're already half suspended.
 851          */
 852         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 853                 struct iwl_mvm_reprobe *reprobe;
 854
 855                 IWL_ERR(mvm,
 856                         "Firmware error during reconfiguration - reprobe!\n");
 857
 858                 /*
 859                  * get a module reference to avoid doing this while unloading
 860                  * anyway and to avoid scheduling a work with code that's
 861                  * being removed.
 862                  */
 863                 if (!try_module_get(THIS_MODULE)) {
 864                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 865                         return;
 866                 }
 867
 868                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 869                 if (!reprobe) {
 870                         module_put(THIS_MODULE);
 871                         return;
 872                 }
 873                 reprobe->dev = mvm->trans->dev;
 874                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 875                 schedule_work(&reprobe->work);
 876         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
 877                    (!fw_error || mvm->restart_fw)) {
 878                 /* don't let the transport/FW power down */
 879                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 880
 881                 if (fw_error && mvm->restart_fw > 0)
 882                         mvm->restart_fw--;
 883                 ieee80211_restart_hw(mvm->hw);
 884         } else if (fw_error) {
 885                 schedule_work(&mvm->fw_error_dump_wk);
 886         }
 887 }
 888
 889 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 890 {
 891         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 892
 893         iwl_mvm_dump_nic_error_log(mvm);
 894
 895         iwl_mvm_nic_restart(mvm, true);
 896 }
 897
 898 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 899 {
 900         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 901
 902         WARN_ON(1);
 903         iwl_mvm_nic_restart(mvm, true);
 904 }
 905
 906 struct iwl_d0i3_iter_data {
 907         struct iwl_mvm *mvm;
 908         u8 ap_sta_id;
 909         u8 vif_count;
 910         u8 offloading_tid;
 911         bool disable_offloading;
 912 };
 913
 914 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 915                                         struct ieee80211_vif *vif,
 916                                         struct iwl_d0i3_iter_data *iter_data)
 917 {
 918         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 919         struct ieee80211_sta *ap_sta;
 920         struct iwl_mvm_sta *mvmsta;
 921         u32 available_tids = 0;
 922         u8 tid;
 923
 924         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 925                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 926                 return false;
 927
 928         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 929         if (IS_ERR_OR_NULL(ap_sta))
 930                 return false;
 931
 932         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 933         spin_lock_bh(&mvmsta->lock);
 934         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 935                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 936
 937                 /*
 938                  * in case of pending tx packets, don't use this tid
 939                  * for offloading in order to prevent reuse of the same
 940                  * qos seq counters.
 941                  */
 942                 if (iwl_mvm_tid_queued(tid_data))
 943                         continue;
 944
 945                 if (tid_data->state != IWL_AGG_OFF)
 946                         continue;
 947
 948                 available_tids |= BIT(tid);
 949         }
 950         spin_unlock_bh(&mvmsta->lock);
 951
 952         /*
 953          * disallow protocol offloading if we have no available tid
 954          * (with no pending frames and no active aggregation,
 955          * as we don't handle "holes" properly - the scheduler needs the
 956          * frame's seq number and TFD index to match)
 957          */
 958         if (!available_tids)
 959                 return true;
 960
 961         /* for simplicity, just use the first available tid */
 962         iter_data->offloading_tid = ffs(available_tids) - 1;
 963         return false;
 964 }
 965
 966 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 967                                         struct ieee80211_vif *vif)
 968 {
 969         struct iwl_d0i3_iter_data *data = _data;
 970         struct iwl_mvm *mvm = data->mvm;
 971         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 972         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 973
 974         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 975         if (vif->type != NL80211_IFTYPE_STATION ||
 976             !vif->bss_conf.assoc)
 977                 return;
 978
 979         /*
 980          * in case of pending tx packets or active aggregations,
 981          * avoid offloading features in order to prevent reuse of
 982          * the same qos seq counters.
 983          */
 984         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 985                 data->disable_offloading = true;
 986
 987         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 988         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 989
 990         /*
 991          * on init/association, mvm already configures POWER_TABLE_CMD
 992          * and REPLY_MCAST_FILTER_CMD, so currently don't
 993          * reconfigure them (we might want to use different
 994          * params later on, though).
 995          */
 996         data->ap_sta_id = mvmvif->ap_sta_id;
 997         data->vif_count++;
 998 }
 999
1000 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1001                                     struct iwl_wowlan_config_cmd *cmd,
1002                                     struct iwl_d0i3_iter_data *iter_data)
1003 {
1004         struct ieee80211_sta *ap_sta;
1005         struct iwl_mvm_sta *mvm_ap_sta;
1006
1007         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1008                 return;
1009
1010         rcu_read_lock();
1011
1012         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1013         if (IS_ERR_OR_NULL(ap_sta))
1014                 goto out;
1015
1016         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1017         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1018         cmd->offloading_tid = iter_data->offloading_tid;
1019
1020         /*
1021          * The d0i3 uCode takes care of the nonqos counters,
1022          * so configure only the qos seq ones.
1023          */
1024         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1025 out:
1026         rcu_read_unlock();
1027 }
1028 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1029 {
1030         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1031         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1032         int ret;
1033         struct iwl_d0i3_iter_data d0i3_iter_data = {
1034                 .mvm = mvm,
1035         };
1036         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1037                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1038                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1039                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1040                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1041         };
1042         struct iwl_d3_manager_config d3_cfg_cmd = {
1043                 .min_sleep_time = cpu_to_le32(1000),
1044         };
1045
1046         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1047
1048         /* make sure we have no running tx while configuring the qos */
1049         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1050         synchronize_net();
1051
1052         /*
1053          * iwl_mvm_ref_sync takes a reference before checking the flag.
1054          * so by checking there is no held reference we prevent a state
1055          * in which iwl_mvm_ref_sync continues successfully while we
1056          * configure the firmware to enter d0i3
1057          */
1058         if (iwl_mvm_ref_taken(mvm)) {
1059                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1060                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1061                 wake_up(&mvm->d0i3_exit_waitq);
1062                 return 1;
1063         }
1064
1065         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1066                                                    IEEE80211_IFACE_ITER_NORMAL,
1067                                                    iwl_mvm_enter_d0i3_iterator,
1068                                                    &d0i3_iter_data);
1069         if (d0i3_iter_data.vif_count == 1) {
1070                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1071                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1072         } else {
1073                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1074                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1075                 mvm->d0i3_offloading = false;
1076         }
1077
1078         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1079         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1080                                    sizeof(wowlan_config_cmd),
1081                                    &wowlan_config_cmd);
1082         if (ret)
1083                 return ret;
1084
1085         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1086                                     flags | CMD_MAKE_TRANS_IDLE,
1087                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1088 }
1089
1090 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1091                                        struct ieee80211_vif *vif)
1092 {
1093         struct iwl_mvm *mvm = _data;
1094         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1095
1096         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1097         if (vif->type != NL80211_IFTYPE_STATION ||
1098             !vif->bss_conf.assoc)
1099                 return;
1100
1101         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1102 }
1103
1104 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1105                                          struct ieee80211_vif *vif)
1106 {
1107         struct iwl_mvm *mvm = data;
1108         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1109
1110         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1111             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1112                 ieee80211_connection_loss(vif);
1113 }
1114
1115 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1116 {
1117         struct ieee80211_sta *sta = NULL;
1118         struct iwl_mvm_sta *mvm_ap_sta;
1119         int i;
1120         bool wake_queues = false;
1121
1122         lockdep_assert_held(&mvm->mutex);
1123
1124         spin_lock_bh(&mvm->d0i3_tx_lock);
1125
1126         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1127                 goto out;
1128
1129         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1130
1131         /* get the sta in order to update seq numbers and re-enqueue skbs */
1132         sta = rcu_dereference_protected(
1133                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1134                         lockdep_is_held(&mvm->mutex));
1135
1136         if (IS_ERR_OR_NULL(sta)) {
1137                 sta = NULL;
1138                 goto out;
1139         }
1140
1141         if (mvm->d0i3_offloading && qos_seq) {
1142                 /* update qos seq numbers if offloading was enabled */
1143                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1144                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1145                         u16 seq = le16_to_cpu(qos_seq[i]);
1146                         /* firmware stores last-used one, we store next one */
1147                         seq += 0x10;
1148                         mvm_ap_sta->tid_data[i].seq_number = seq;
1149                 }
1150         }
1151 out:
1152         /* re-enqueue (or drop) all packets */
1153         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1154                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1155
1156                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1157                         ieee80211_free_txskb(mvm->hw, skb);
1158
1159                 /* if the skb_queue is not empty, we need to wake queues */
1160                 wake_queues = true;
1161         }
1162         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1163         wake_up(&mvm->d0i3_exit_waitq);
1164         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1165         if (wake_queues)
1166                 ieee80211_wake_queues(mvm->hw);
1167
1168         spin_unlock_bh(&mvm->d0i3_tx_lock);
1169 }
1170
1171 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1172 {
1173         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1174         struct iwl_host_cmd get_status_cmd = {
1175                 .id = WOWLAN_GET_STATUSES,
1176                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1177         };
1178         struct iwl_wowlan_status *status;
1179         int ret;
1180         u32 disconnection_reasons, wakeup_reasons;
1181         __le16 *qos_seq = NULL;
1182
1183         mutex_lock(&mvm->mutex);
1184         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1185         if (ret)
1186                 goto out;
1187
1188         if (!get_status_cmd.resp_pkt)
1189                 goto out;
1190
1191         status = (void *)get_status_cmd.resp_pkt->data;
1192         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1193         qos_seq = status->qos_seq_ctr;
1194
1195         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1196
1197         disconnection_reasons =
1198                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1199                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1200         if (wakeup_reasons & disconnection_reasons)
1201                 ieee80211_iterate_active_interfaces(
1202                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1203                         iwl_mvm_d0i3_disconnect_iter, mvm);
1204
1205         iwl_free_resp(&get_status_cmd);
1206 out:
1207         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1208         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1209         mutex_unlock(&mvm->mutex);
1210 }
1211
1212 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1213 {
1214         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1215                     CMD_WAKE_UP_TRANS;
1216         int ret;
1217
1218         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1219
1220         mutex_lock(&mvm->d0i3_suspend_mutex);
1221         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1222                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1223                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1224                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1225                 return 0;
1226         }
1227         mutex_unlock(&mvm->d0i3_suspend_mutex);
1228
1229         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1230         if (ret)
1231                 goto out;
1232
1233         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1234                                                    IEEE80211_IFACE_ITER_NORMAL,
1235                                                    iwl_mvm_exit_d0i3_iterator,
1236                                                    mvm);
1237 out:
1238         schedule_work(&mvm->d0i3_exit_work);
1239         return ret;
1240 }
1241
1242 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1243 {
1244         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1245
1246         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1247         return _iwl_mvm_exit_d0i3(mvm);
1248 }
1249
1250 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1251                              struct napi_struct *napi,
1252                              struct net_device *napi_dev,
1253                              int (*poll)(struct napi_struct *, int),
1254                              int weight)
1255 {
1256         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1257
1258         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1259 }
1260
1261 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1262         .start = iwl_op_mode_mvm_start,
1263         .stop = iwl_op_mode_mvm_stop,
1264         .rx = iwl_mvm_rx_dispatch,
1265         .queue_full = iwl_mvm_stop_sw_queue,
1266         .queue_not_full = iwl_mvm_wake_sw_queue,
1267         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1268         .free_skb = iwl_mvm_free_skb,
1269         .nic_error = iwl_mvm_nic_error,
1270         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1271         .nic_config = iwl_mvm_nic_config,
1272         .enter_d0i3 = iwl_mvm_enter_d0i3,
1273         .exit_d0i3 = iwl_mvm_exit_d0i3,
1274         .napi_add = iwl_mvm_napi_add,
1275 };