drivers/net/wireless/intel/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 - 2015 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 - 2015 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 "fw-dbg.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 static const struct iwl_op_mode_ops iwl_mvm_ops_mq;
  94
  95 struct iwl_mvm_mod_params iwlmvm_mod_params = {
  96         .power_scheme = IWL_POWER_SCHEME_BPS,
  97         .tfd_q_hang_detect = true
  98         /* rest of fields are 0 by default */
  99 };
 100
 101 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 102 MODULE_PARM_DESC(init_dbg,
 103                  "set to true to debug an ASSERT in INIT fw (default: false");
 104 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 105 MODULE_PARM_DESC(power_scheme,
 106                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 107 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
 108                    bool, S_IRUGO);
 109 MODULE_PARM_DESC(tfd_q_hang_detect,
 110                  "TFD queues hang detection (default: true");
 111
 112 /*
 113  * module init and exit functions
 114  */
 115 static int __init iwl_mvm_init(void)
 116 {
 117         int ret;
 118
 119         ret = iwl_mvm_rate_control_register();
 120         if (ret) {
 121                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 122                 return ret;
 123         }
 124
 125         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 126
 127         if (ret) {
 128                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 129                 iwl_mvm_rate_control_unregister();
 130         }
 131
 132         return ret;
 133 }
 134 module_init(iwl_mvm_init);
 135
 136 static void __exit iwl_mvm_exit(void)
 137 {
 138         iwl_opmode_deregister("iwlmvm");
 139         iwl_mvm_rate_control_unregister();
 140 }
 141 module_exit(iwl_mvm_exit);
 142
 143 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 144 {
 145         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 146         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 147         u32 reg_val = 0;
 148         u32 phy_config = iwl_mvm_get_phy_config(mvm);
 149
 150         radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 151                          FW_PHY_CFG_RADIO_TYPE_POS;
 152         radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
 153                          FW_PHY_CFG_RADIO_STEP_POS;
 154         radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
 155                          FW_PHY_CFG_RADIO_DASH_POS;
 156
 157         /* SKU control */
 158         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 160         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 161                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 162
 163         /* radio configuration */
 164         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 165         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 166         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 167
 168         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 169                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 170
 171         /*
 172          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 173          * shouldn't be set to any non-zero value. The same is supposed to be
 174          * true of the other HW, but unsetting them (such as the 7260) causes
 175          * automatic tests to fail on seemingly unrelated errors. Need to
 176          * further investigate this, but for now we'll separate cases.
 177          */
 178         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 179                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 180
 181         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 182                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 185                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 186                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 187                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 188                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 189                                 reg_val);
 190
 191         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 192                        radio_cfg_step, radio_cfg_dash);
 193
 194         /*
 195          * W/A : NIC is stuck in a reset state after Early PCIe power off
 196          * (PCIe power is lost before PERST# is asserted), causing ME FW
 197          * to lose ownership and not being able to obtain it back.
 198          */
 199         if (!mvm->trans->cfg->apmg_not_supported)
 200                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 201                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 202                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 203 }
 204
 205 struct iwl_rx_handlers {
 206         u16 cmd_id;
 207         bool async;
 208         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 209 };
 210
 211 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 212         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 213 #define RX_HANDLER_GRP(_grp, _cmd, _fn, _async) \
 214         { .cmd_id = WIDE_ID(_grp, _cmd), .fn = _fn, .async = _async }
 215
 216 /*
 217  * Handlers for fw notifications
 218  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 219  * This list should be in order of frequency for performance purposes.
 220  *
 221  * The handler can be SYNC - this means that it will be called in the Rx path
 222  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 223  * only in this case!), it should be set as ASYNC. In that case, it will be
 224  * called from a worker with mvm->mutex held.
 225  */
 226 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 227         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 228         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 229
 230         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 231         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 232         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 233         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 234                    iwl_mvm_rx_ant_coupling_notif, true),
 235
 236         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 237         RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
 238
 239         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 240
 241         RX_HANDLER(SCAN_ITERATION_COMPLETE,
 242                    iwl_mvm_rx_lmac_scan_iter_complete_notif, false),
 243         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 244                    iwl_mvm_rx_lmac_scan_complete_notif, true),
 245         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_match_found,
 246                    false),
 247         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 248                    true),
 249         RX_HANDLER(SCAN_ITERATION_COMPLETE_UMAC,
 250                    iwl_mvm_rx_umac_scan_iter_complete_notif, false),
 251
 252         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 253
 254         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 255                    false),
 256
 257         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 258         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 259                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 260         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 261         RX_HANDLER_GRP(PHY_OPS_GROUP, DTS_MEASUREMENT_NOTIF_WIDE,
 262                        iwl_mvm_temp_notif, true),
 263
 264         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 265                    true),
 266         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 267         RX_HANDLER(TOF_NOTIFICATION, iwl_mvm_tof_resp_handler, true),
 268
 269 };
 270 #undef RX_HANDLER
 271 #undef RX_HANDLER_GRP
 272 #define CMD(x) [x] = #x
 273
 274 static const char *const iwl_mvm_cmd_strings[REPLY_MAX + 1] = {
 275         CMD(MVM_ALIVE),
 276         CMD(REPLY_ERROR),
 277         CMD(ECHO_CMD),
 278         CMD(INIT_COMPLETE_NOTIF),
 279         CMD(PHY_CONTEXT_CMD),
 280         CMD(MGMT_MCAST_KEY),
 281         CMD(TX_CMD),
 282         CMD(TXPATH_FLUSH),
 283         CMD(SHARED_MEM_CFG),
 284         CMD(MAC_CONTEXT_CMD),
 285         CMD(TIME_EVENT_CMD),
 286         CMD(TIME_EVENT_NOTIFICATION),
 287         CMD(BINDING_CONTEXT_CMD),
 288         CMD(TIME_QUOTA_CMD),
 289         CMD(NON_QOS_TX_COUNTER_CMD),
 290         CMD(DC2DC_CONFIG_CMD),
 291         CMD(NVM_ACCESS_CMD),
 292         CMD(PHY_CONFIGURATION_CMD),
 293         CMD(CALIB_RES_NOTIF_PHY_DB),
 294         CMD(SET_CALIB_DEFAULT_CMD),
 295         CMD(FW_PAGING_BLOCK_CMD),
 296         CMD(ADD_STA_KEY),
 297         CMD(ADD_STA),
 298         CMD(FW_GET_ITEM_CMD),
 299         CMD(REMOVE_STA),
 300         CMD(LQ_CMD),
 301         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 302         CMD(MATCH_FOUND_NOTIFICATION),
 303         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 304         CMD(SCAN_OFFLOAD_ABORT_CMD),
 305         CMD(HOT_SPOT_CMD),
 306         CMD(SCAN_OFFLOAD_COMPLETE),
 307         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 308         CMD(SCAN_ITERATION_COMPLETE),
 309         CMD(POWER_TABLE_CMD),
 310         CMD(WEP_KEY),
 311         CMD(REPLY_RX_PHY_CMD),
 312         CMD(REPLY_RX_MPDU_CMD),
 313         CMD(FRAME_RELEASE),
 314         CMD(BEACON_NOTIFICATION),
 315         CMD(BEACON_TEMPLATE_CMD),
 316         CMD(STATISTICS_CMD),
 317         CMD(STATISTICS_NOTIFICATION),
 318         CMD(EOSP_NOTIFICATION),
 319         CMD(REDUCE_TX_POWER_CMD),
 320         CMD(TX_ANT_CONFIGURATION_CMD),
 321         CMD(D3_CONFIG_CMD),
 322         CMD(D0I3_END_CMD),
 323         CMD(PROT_OFFLOAD_CONFIG_CMD),
 324         CMD(OFFLOADS_QUERY_CMD),
 325         CMD(REMOTE_WAKE_CONFIG_CMD),
 326         CMD(WOWLAN_PATTERNS),
 327         CMD(WOWLAN_CONFIGURATION),
 328         CMD(WOWLAN_TSC_RSC_PARAM),
 329         CMD(WOWLAN_TKIP_PARAM),
 330         CMD(WOWLAN_KEK_KCK_MATERIAL),
 331         CMD(WOWLAN_GET_STATUSES),
 332         CMD(WOWLAN_TX_POWER_PER_DB),
 333         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 334         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 335         CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
 336         CMD(CARD_STATE_NOTIFICATION),
 337         CMD(MISSED_BEACONS_NOTIFICATION),
 338         CMD(BT_COEX_PRIO_TABLE),
 339         CMD(BT_COEX_PROT_ENV),
 340         CMD(BT_PROFILE_NOTIFICATION),
 341         CMD(BT_CONFIG),
 342         CMD(MCAST_FILTER_CMD),
 343         CMD(BCAST_FILTER_CMD),
 344         CMD(REPLY_SF_CFG_CMD),
 345         CMD(REPLY_BEACON_FILTERING_CMD),
 346         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 347         CMD(DTS_MEASUREMENT_NOTIFICATION),
 348         CMD(REPLY_THERMAL_MNG_BACKOFF),
 349         CMD(MAC_PM_POWER_TABLE),
 350         CMD(LTR_CONFIG),
 351         CMD(BT_COEX_CI),
 352         CMD(BT_COEX_UPDATE_SW_BOOST),
 353         CMD(BT_COEX_UPDATE_CORUN_LUT),
 354         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 355         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 356         CMD(ANTENNA_COUPLING_NOTIFICATION),
 357         CMD(SCD_QUEUE_CFG),
 358         CMD(SCAN_CFG_CMD),
 359         CMD(SCAN_REQ_UMAC),
 360         CMD(SCAN_ABORT_UMAC),
 361         CMD(SCAN_COMPLETE_UMAC),
 362         CMD(TDLS_CHANNEL_SWITCH_CMD),
 363         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 364         CMD(TDLS_CONFIG_CMD),
 365         CMD(MCC_UPDATE_CMD),
 366         CMD(SCAN_ITERATION_COMPLETE_UMAC),
 367         CMD(LDBG_CONFIG_CMD),
 368 };
 369 #undef CMD
 370
 371 /* this forward declaration can avoid to export the function */
 372 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 373 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 374
 375 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 376 {
 377         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 378
 379         if (!pwr_tx_backoff)
 380                 return 0;
 381
 382         while (pwr_tx_backoff->pwr) {
 383                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 384                         return pwr_tx_backoff->backoff;
 385
 386                 pwr_tx_backoff++;
 387         }
 388
 389         return 0;
 390 }
 391
 392 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 393
 394 static struct iwl_op_mode *
 395 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 396                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 397 {
 398         struct ieee80211_hw *hw;
 399         struct iwl_op_mode *op_mode;
 400         struct iwl_mvm *mvm;
 401         struct iwl_trans_config trans_cfg = {};
 402         static const u8 no_reclaim_cmds[] = {
 403                 TX_CMD,
 404         };
 405         int err, scan_size;
 406         u32 min_backoff;
 407
 408         /*
 409          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 410          * index all over the driver - check that its value corresponds to the
 411          * array size.
 412          */
 413         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 414
 415         /********************************
 416          * 1. Allocating and configuring HW data
 417          ********************************/
 418         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 419                                 sizeof(struct iwl_mvm),
 420                                 &iwl_mvm_hw_ops);
 421         if (!hw)
 422                 return NULL;
 423
 424         if (cfg->max_rx_agg_size)
 425                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 426
 427         if (cfg->max_tx_agg_size)
 428                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 429
 430         op_mode = hw->priv;
 431
 432         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 433         mvm->dev = trans->dev;
 434         mvm->trans = trans;
 435         mvm->cfg = cfg;
 436         mvm->fw = fw;
 437         mvm->hw = hw;
 438
 439         if (iwl_mvm_has_new_rx_api(mvm)) {
 440                 op_mode->ops = &iwl_mvm_ops_mq;
 441         } else {
 442                 op_mode->ops = &iwl_mvm_ops;
 443
 444                 if (WARN_ON(trans->num_rx_queues > 1))
 445                         goto out_free;
 446         }
 447
 448         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 449
 450         mvm->aux_queue = 15;
 451         mvm->first_agg_queue = 16;
 452         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 453         if (mvm->cfg->base_params->num_of_queues == 16) {
 454                 mvm->aux_queue = 11;
 455                 mvm->first_agg_queue = 12;
 456         }
 457         mvm->sf_state = SF_UNINIT;
 458         mvm->cur_ucode = IWL_UCODE_INIT;
 459
 460         mutex_init(&mvm->mutex);
 461         mutex_init(&mvm->d0i3_suspend_mutex);
 462         spin_lock_init(&mvm->async_handlers_lock);
 463         INIT_LIST_HEAD(&mvm->time_event_list);
 464         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 465         INIT_LIST_HEAD(&mvm->async_handlers_list);
 466         spin_lock_init(&mvm->time_event_lock);
 467         spin_lock_init(&mvm->queue_info_lock);
 468
 469         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 470         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 471         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 472         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 473         INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
 474         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
 475
 476         spin_lock_init(&mvm->d0i3_tx_lock);
 477         spin_lock_init(&mvm->refs_lock);
 478         skb_queue_head_init(&mvm->d0i3_tx);
 479         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 480
 481         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 482
 483         /*
 484          * Populate the state variables that the transport layer needs
 485          * to know about.
 486          */
 487         trans_cfg.op_mode = op_mode;
 488         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 489         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 490         switch (iwlwifi_mod_params.amsdu_size) {
 491         case IWL_AMSDU_4K:
 492                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
 493                 break;
 494         case IWL_AMSDU_8K:
 495                 trans_cfg.rx_buf_size = IWL_AMSDU_8K;
 496                 break;
 497         case IWL_AMSDU_12K:
 498                 trans_cfg.rx_buf_size = IWL_AMSDU_12K;
 499                 break;
 500         default:
 501                 pr_err("%s: Unsupported amsdu_size: %d\n", KBUILD_MODNAME,
 502                        iwlwifi_mod_params.amsdu_size);
 503                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
 504         }
 505         trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa,
 506                                                IWL_UCODE_TLV_API_WIDE_CMD_HDR);
 507
 508         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 509                 trans_cfg.bc_table_dword = true;
 510
 511         trans_cfg.command_names = iwl_mvm_cmd_strings;
 512
 513         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 514         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 515         trans_cfg.scd_set_active = true;
 516
 517         trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
 518
 519         /* Set a short watchdog for the command queue */
 520         trans_cfg.cmd_q_wdg_timeout =
 521                 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
 522
 523         snprintf(mvm->hw->wiphy->fw_version,
 524                  sizeof(mvm->hw->wiphy->fw_version),
 525                  "%s", fw->fw_version);
 526
 527         /* Configure transport layer */
 528         iwl_trans_configure(mvm->trans, &trans_cfg);
 529
 530         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 531         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 532         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 533         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 534         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 535                sizeof(trans->dbg_conf_tlv));
 536         trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
 537
 538         /* set up notification wait support */
 539         iwl_notification_wait_init(&mvm->notif_wait);
 540
 541         /* Init phy db */
 542         mvm->phy_db = iwl_phy_db_init(trans);
 543         if (!mvm->phy_db) {
 544                 IWL_ERR(mvm, "Cannot init phy_db\n");
 545                 goto out_free;
 546         }
 547
 548         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 549                  mvm->cfg->name, mvm->trans->hw_rev);
 550
 551         min_backoff = calc_min_backoff(trans, cfg);
 552         iwl_mvm_tt_initialize(mvm, min_backoff);
 553
 554         if (iwlwifi_mod_params.nvm_file)
 555                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 556         else
 557                 IWL_DEBUG_EEPROM(mvm->trans->dev,
 558                                  "working without external nvm file\n");
 559
 560         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 561                  "not allowing power-up and not having nvm_file\n"))
 562                 goto out_free;
 563
 564         /*
 565          * Even if nvm exists in the nvm_file driver should read again the nvm
 566          * from the nic because there might be entries that exist in the OTP
 567          * and not in the file.
 568          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 569          */
 570         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 571                 err = iwl_nvm_init(mvm, false);
 572                 if (err)
 573                         goto out_free;
 574         } else {
 575                 err = iwl_trans_start_hw(mvm->trans);
 576                 if (err)
 577                         goto out_free;
 578
 579                 mutex_lock(&mvm->mutex);
 580                 err = iwl_run_init_mvm_ucode(mvm, true);
 581                 if (!err || !iwlmvm_mod_params.init_dbg)
 582                         iwl_trans_stop_device(trans);
 583                 mutex_unlock(&mvm->mutex);
 584                 /* returns 0 if successful, 1 if success but in rfkill */
 585                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 586                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 587                         goto out_free;
 588                 }
 589         }
 590
 591         scan_size = iwl_mvm_scan_size(mvm);
 592
 593         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 594         if (!mvm->scan_cmd)
 595                 goto out_free;
 596
 597         /* Set EBS as successful as long as not stated otherwise by the FW. */
 598         mvm->last_ebs_successful = true;
 599
 600         err = iwl_mvm_mac_setup_register(mvm);
 601         if (err)
 602                 goto out_free;
 603
 604         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 605         if (err)
 606                 goto out_unregister;
 607
 608         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 609
 610         /* rpm starts with a taken ref. only set the appropriate bit here. */
 611         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 612
 613         iwl_mvm_tof_init(mvm);
 614
 615         return op_mode;
 616
 617  out_unregister:
 618         ieee80211_unregister_hw(mvm->hw);
 619         iwl_mvm_leds_exit(mvm);
 620  out_free:
 621         flush_delayed_work(&mvm->fw_dump_wk);
 622         iwl_phy_db_free(mvm->phy_db);
 623         kfree(mvm->scan_cmd);
 624         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 625                 iwl_trans_op_mode_leave(trans);
 626         ieee80211_free_hw(mvm->hw);
 627         return NULL;
 628 }
 629
 630 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 631 {
 632         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 633         int i;
 634
 635         iwl_mvm_leds_exit(mvm);
 636
 637         iwl_mvm_tt_exit(mvm);
 638
 639         ieee80211_unregister_hw(mvm->hw);
 640
 641         kfree(mvm->scan_cmd);
 642         kfree(mvm->mcast_filter_cmd);
 643         mvm->mcast_filter_cmd = NULL;
 644
 645 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 646         kfree(mvm->d3_resume_sram);
 647 #endif
 648
 649         iwl_trans_op_mode_leave(mvm->trans);
 650
 651         iwl_phy_db_free(mvm->phy_db);
 652         mvm->phy_db = NULL;
 653
 654         iwl_free_nvm_data(mvm->nvm_data);
 655         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 656                 kfree(mvm->nvm_sections[i].data);
 657
 658         iwl_mvm_tof_clean(mvm);
 659
 660         ieee80211_free_hw(mvm->hw);
 661 }
 662
 663 struct iwl_async_handler_entry {
 664         struct list_head list;
 665         struct iwl_rx_cmd_buffer rxb;
 666         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 667 };
 668
 669 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 670 {
 671         struct iwl_async_handler_entry *entry, *tmp;
 672
 673         spin_lock_bh(&mvm->async_handlers_lock);
 674         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 675                 iwl_free_rxb(&entry->rxb);
 676                 list_del(&entry->list);
 677                 kfree(entry);
 678         }
 679         spin_unlock_bh(&mvm->async_handlers_lock);
 680 }
 681
 682 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 683 {
 684         struct iwl_mvm *mvm =
 685                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 686         struct iwl_async_handler_entry *entry, *tmp;
 687         struct list_head local_list;
 688
 689         INIT_LIST_HEAD(&local_list);
 690
 691         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 692         mutex_lock(&mvm->mutex);
 693
 694         /*
 695          * Sync with Rx path with a lock. Remove all the entries from this list,
 696          * add them to a local one (lock free), and then handle them.
 697          */
 698         spin_lock_bh(&mvm->async_handlers_lock);
 699         list_splice_init(&mvm->async_handlers_list, &local_list);
 700         spin_unlock_bh(&mvm->async_handlers_lock);
 701
 702         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 703                 entry->fn(mvm, &entry->rxb);
 704                 iwl_free_rxb(&entry->rxb);
 705                 list_del(&entry->list);
 706                 kfree(entry);
 707         }
 708         mutex_unlock(&mvm->mutex);
 709 }
 710
 711 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
 712                                             struct iwl_rx_packet *pkt)
 713 {
 714         struct iwl_fw_dbg_trigger_tlv *trig;
 715         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
 716         int i;
 717
 718         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
 719                 return;
 720
 721         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
 722         cmds_trig = (void *)trig->data;
 723
 724         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 725                 return;
 726
 727         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
 728                 /* don't collect on CMD 0 */
 729                 if (!cmds_trig->cmds[i].cmd_id)
 730                         break;
 731
 732                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd ||
 733                     cmds_trig->cmds[i].group_id != pkt->hdr.group_id)
 734                         continue;
 735
 736                 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
 737                                             "CMD 0x%02x.%02x received",
 738                                             pkt->hdr.group_id, pkt->hdr.cmd);
 739                 break;
 740         }
 741 }
 742
 743 static void iwl_mvm_rx_common(struct iwl_mvm *mvm,
 744                               struct iwl_rx_cmd_buffer *rxb,
 745                               struct iwl_rx_packet *pkt)
 746 {
 747         int i;
 748
 749         iwl_mvm_rx_check_trigger(mvm, pkt);
 750
 751         /*
 752          * Do the notification wait before RX handlers so
 753          * even if the RX handler consumes the RXB we have
 754          * access to it in the notification wait entry.
 755          */
 756         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 757
 758         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 759                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 760                 struct iwl_async_handler_entry *entry;
 761
 762                 if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
 763                         continue;
 764
 765                 if (!rx_h->async) {
 766                         rx_h->fn(mvm, rxb);
 767                         return;
 768                 }
 769
 770                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 771                 /* we can't do much... */
 772                 if (!entry)
 773                         return;
 774
 775                 entry->rxb._page = rxb_steal_page(rxb);
 776                 entry->rxb._offset = rxb->_offset;
 777                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 778                 entry->fn = rx_h->fn;
 779                 spin_lock(&mvm->async_handlers_lock);
 780                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 781                 spin_unlock(&mvm->async_handlers_lock);
 782                 schedule_work(&mvm->async_handlers_wk);
 783                 break;
 784         }
 785 }
 786
 787 static void iwl_mvm_rx(struct iwl_op_mode *op_mode,
 788                        struct napi_struct *napi,
 789                        struct iwl_rx_cmd_buffer *rxb)
 790 {
 791         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 792         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 793
 794         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
 795                 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
 796         else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
 797                 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
 798         else
 799                 iwl_mvm_rx_common(mvm, rxb, pkt);
 800 }
 801
 802 static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
 803                           struct napi_struct *napi,
 804                           struct iwl_rx_cmd_buffer *rxb)
 805 {
 806         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 807         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 808
 809         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
 810                 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
 811         else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
 812                 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
 813         else
 814                 iwl_mvm_rx_common(mvm, rxb, pkt);
 815 }
 816
 817 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 818 {
 819         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 820         unsigned long mq;
 821         int q;
 822
 823         spin_lock_bh(&mvm->queue_info_lock);
 824         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
 825         spin_unlock_bh(&mvm->queue_info_lock);
 826
 827         if (WARN_ON_ONCE(!mq))
 828                 return;
 829
 830         for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
 831                 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[q]) > 1) {
 832                         IWL_DEBUG_TX_QUEUES(mvm,
 833                                             "queue %d (mac80211 %d) already stopped\n",
 834                                             queue, q);
 835                         continue;
 836                 }
 837
 838                 ieee80211_stop_queue(mvm->hw, q);
 839         }
 840 }
 841
 842 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 843 {
 844         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 845         unsigned long mq;
 846         int q;
 847
 848         spin_lock_bh(&mvm->queue_info_lock);
 849         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
 850         spin_unlock_bh(&mvm->queue_info_lock);
 851
 852         if (WARN_ON_ONCE(!mq))
 853                 return;
 854
 855         for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
 856                 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[q]) > 0) {
 857                         IWL_DEBUG_TX_QUEUES(mvm,
 858                                             "queue %d (mac80211 %d) still stopped\n",
 859                                             queue, q);
 860                         continue;
 861                 }
 862
 863                 ieee80211_wake_queue(mvm->hw, q);
 864         }
 865 }
 866
 867 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 868 {
 869         if (state)
 870                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 871         else
 872                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 873
 874         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 875 }
 876
 877 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 878 {
 879         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 880         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 881
 882         if (state)
 883                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 884         else
 885                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 886
 887         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 888
 889         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 890         if (calibrating)
 891                 iwl_abort_notification_waits(&mvm->notif_wait);
 892
 893         /*
 894          * Stop the device if we run OPERATIONAL firmware or if we are in the
 895          * middle of the calibrations.
 896          */
 897         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 898 }
 899
 900 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 901 {
 902         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 903         struct ieee80211_tx_info *info;
 904
 905         info = IEEE80211_SKB_CB(skb);
 906         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 907         ieee80211_free_txskb(mvm->hw, skb);
 908 }
 909
 910 struct iwl_mvm_reprobe {
 911         struct device *dev;
 912         struct work_struct work;
 913 };
 914
 915 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 916 {
 917         struct iwl_mvm_reprobe *reprobe;
 918
 919         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 920         if (device_reprobe(reprobe->dev))
 921                 dev_err(reprobe->dev, "reprobe failed!\n");
 922         kfree(reprobe);
 923         module_put(THIS_MODULE);
 924 }
 925
 926 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 927 {
 928         struct iwl_mvm *mvm =
 929                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 930
 931         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 932                 return;
 933
 934         mutex_lock(&mvm->mutex);
 935
 936         /* stop recording */
 937         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
 938                 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
 939         } else {
 940                 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
 941                 /* wait before we collect the data till the DBGC stop */
 942                 udelay(100);
 943         }
 944
 945         iwl_mvm_fw_error_dump(mvm);
 946
 947         /* start recording again if the firmware is not crashed */
 948         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 949                      mvm->fw->dbg_dest_tlv &&
 950                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 951
 952         mutex_unlock(&mvm->mutex);
 953
 954         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 955 }
 956
 957 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 958 {
 959         iwl_abort_notification_waits(&mvm->notif_wait);
 960
 961         /*
 962          * This is a bit racy, but worst case we tell mac80211 about
 963          * a stopped/aborted scan when that was already done which
 964          * is not a problem. It is necessary to abort any os scan
 965          * here because mac80211 requires having the scan cleared
 966          * before restarting.
 967          * We'll reset the scan_status to NONE in restart cleanup in
 968          * the next start() call from mac80211. If restart isn't called
 969          * (no fw restart) scan status will stay busy.
 970          */
 971         iwl_mvm_report_scan_aborted(mvm);
 972
 973         /*
 974          * If we're restarting already, don't cycle restarts.
 975          * If INIT fw asserted, it will likely fail again.
 976          * If WoWLAN fw asserted, don't restart either, mac80211
 977          * can't recover this since we're already half suspended.
 978          */
 979         if (!mvm->restart_fw && fw_error) {
 980                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert,
 981                                             NULL);
 982         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 983                                     &mvm->status)) {
 984                 struct iwl_mvm_reprobe *reprobe;
 985
 986                 IWL_ERR(mvm,
 987                         "Firmware error during reconfiguration - reprobe!\n");
 988
 989                 /*
 990                  * get a module reference to avoid doing this while unloading
 991                  * anyway and to avoid scheduling a work with code that's
 992                  * being removed.
 993                  */
 994                 if (!try_module_get(THIS_MODULE)) {
 995                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 996                         return;
 997                 }
 998
 999                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
1000                 if (!reprobe) {
1001                         module_put(THIS_MODULE);
1002                         return;
1003                 }
1004                 reprobe->dev = mvm->trans->dev;
1005                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
1006                 schedule_work(&reprobe->work);
1007         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
1008                 /* don't let the transport/FW power down */
1009                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1010
1011                 if (fw_error && mvm->restart_fw > 0)
1012                         mvm->restart_fw--;
1013                 ieee80211_restart_hw(mvm->hw);
1014         }
1015 }
1016
1017 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
1018 {
1019         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1020
1021         iwl_mvm_dump_nic_error_log(mvm);
1022
1023         iwl_mvm_nic_restart(mvm, true);
1024 }
1025
1026 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
1027 {
1028         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1029
1030         WARN_ON(1);
1031         iwl_mvm_nic_restart(mvm, true);
1032 }
1033
1034 struct iwl_d0i3_iter_data {
1035         struct iwl_mvm *mvm;
1036         u8 ap_sta_id;
1037         u8 vif_count;
1038         u8 offloading_tid;
1039         bool disable_offloading;
1040 };
1041
1042 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
1043                                         struct ieee80211_vif *vif,
1044                                         struct iwl_d0i3_iter_data *iter_data)
1045 {
1046         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1047         struct ieee80211_sta *ap_sta;
1048         struct iwl_mvm_sta *mvmsta;
1049         u32 available_tids = 0;
1050         u8 tid;
1051
1052         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
1053                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
1054                 return false;
1055
1056         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
1057         if (IS_ERR_OR_NULL(ap_sta))
1058                 return false;
1059
1060         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
1061         spin_lock_bh(&mvmsta->lock);
1062         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1063                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1064
1065                 /*
1066                  * in case of pending tx packets, don't use this tid
1067                  * for offloading in order to prevent reuse of the same
1068                  * qos seq counters.
1069                  */
1070                 if (iwl_mvm_tid_queued(tid_data))
1071                         continue;
1072
1073                 if (tid_data->state != IWL_AGG_OFF)
1074                         continue;
1075
1076                 available_tids |= BIT(tid);
1077         }
1078         spin_unlock_bh(&mvmsta->lock);
1079
1080         /*
1081          * disallow protocol offloading if we have no available tid
1082          * (with no pending frames and no active aggregation,
1083          * as we don't handle "holes" properly - the scheduler needs the
1084          * frame's seq number and TFD index to match)
1085          */
1086         if (!available_tids)
1087                 return true;
1088
1089         /* for simplicity, just use the first available tid */
1090         iter_data->offloading_tid = ffs(available_tids) - 1;
1091         return false;
1092 }
1093
1094 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1095                                         struct ieee80211_vif *vif)
1096 {
1097         struct iwl_d0i3_iter_data *data = _data;
1098         struct iwl_mvm *mvm = data->mvm;
1099         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1100         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1101
1102         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1103         if (vif->type != NL80211_IFTYPE_STATION ||
1104             !vif->bss_conf.assoc)
1105                 return;
1106
1107         /*
1108          * in case of pending tx packets or active aggregations,
1109          * avoid offloading features in order to prevent reuse of
1110          * the same qos seq counters.
1111          */
1112         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1113                 data->disable_offloading = true;
1114
1115         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1116         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1117
1118         /*
1119          * on init/association, mvm already configures POWER_TABLE_CMD
1120          * and REPLY_MCAST_FILTER_CMD, so currently don't
1121          * reconfigure them (we might want to use different
1122          * params later on, though).
1123          */
1124         data->ap_sta_id = mvmvif->ap_sta_id;
1125         data->vif_count++;
1126 }
1127
1128 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1129                                     struct iwl_wowlan_config_cmd *cmd,
1130                                     struct iwl_d0i3_iter_data *iter_data)
1131 {
1132         struct ieee80211_sta *ap_sta;
1133         struct iwl_mvm_sta *mvm_ap_sta;
1134
1135         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1136                 return;
1137
1138         rcu_read_lock();
1139
1140         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1141         if (IS_ERR_OR_NULL(ap_sta))
1142                 goto out;
1143
1144         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1145         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1146         cmd->offloading_tid = iter_data->offloading_tid;
1147
1148         /*
1149          * The d0i3 uCode takes care of the nonqos counters,
1150          * so configure only the qos seq ones.
1151          */
1152         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1153 out:
1154         rcu_read_unlock();
1155 }
1156
1157 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1158 {
1159         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1160         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1161         int ret;
1162         struct iwl_d0i3_iter_data d0i3_iter_data = {
1163                 .mvm = mvm,
1164         };
1165         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1166                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1167                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1168                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1169                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1170         };
1171         struct iwl_d3_manager_config d3_cfg_cmd = {
1172                 .min_sleep_time = cpu_to_le32(1000),
1173                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1174         };
1175
1176         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1177
1178         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1179
1180         /*
1181          * iwl_mvm_ref_sync takes a reference before checking the flag.
1182          * so by checking there is no held reference we prevent a state
1183          * in which iwl_mvm_ref_sync continues successfully while we
1184          * configure the firmware to enter d0i3
1185          */
1186         if (iwl_mvm_ref_taken(mvm)) {
1187                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1188                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1189                 wake_up(&mvm->d0i3_exit_waitq);
1190                 return 1;
1191         }
1192
1193         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1194                                                    IEEE80211_IFACE_ITER_NORMAL,
1195                                                    iwl_mvm_enter_d0i3_iterator,
1196                                                    &d0i3_iter_data);
1197         if (d0i3_iter_data.vif_count == 1) {
1198                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1199                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1200         } else {
1201                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1202                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1203                 mvm->d0i3_offloading = false;
1204         }
1205
1206         /* make sure we have no running tx while configuring the seqno */
1207         synchronize_net();
1208
1209         /* Flush the hw queues, in case something got queued during entry */
1210         ret = iwl_mvm_flush_tx_path(mvm, iwl_mvm_flushable_queues(mvm), flags);
1211         if (ret)
1212                 return ret;
1213
1214         /* configure wowlan configuration only if needed */
1215         if (mvm->d0i3_ap_sta_id != IWL_MVM_STATION_COUNT) {
1216                 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd,
1217                                         &d0i3_iter_data);
1218
1219                 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1220                                            sizeof(wowlan_config_cmd),
1221                                            &wowlan_config_cmd);
1222                 if (ret)
1223                         return ret;
1224         }
1225
1226         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1227                                     flags | CMD_MAKE_TRANS_IDLE,
1228                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1229 }
1230
1231 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1232                                        struct ieee80211_vif *vif)
1233 {
1234         struct iwl_mvm *mvm = _data;
1235         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1236
1237         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1238         if (vif->type != NL80211_IFTYPE_STATION ||
1239             !vif->bss_conf.assoc)
1240                 return;
1241
1242         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1243 }
1244
1245 struct iwl_mvm_wakeup_reason_iter_data {
1246         struct iwl_mvm *mvm;
1247         u32 wakeup_reasons;
1248 };
1249
1250 static void iwl_mvm_d0i3_wakeup_reason_iter(void *_data, u8 *mac,
1251                                             struct ieee80211_vif *vif)
1252 {
1253         struct iwl_mvm_wakeup_reason_iter_data *data = _data;
1254         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1255
1256         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1257             data->mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) {
1258                 if (data->wakeup_reasons &
1259                     IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH)
1260                         iwl_mvm_connection_loss(data->mvm, vif, "D0i3");
1261                 else
1262                         ieee80211_beacon_loss(vif);
1263         }
1264 }
1265
1266 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1267 {
1268         struct ieee80211_sta *sta = NULL;
1269         struct iwl_mvm_sta *mvm_ap_sta;
1270         int i;
1271         bool wake_queues = false;
1272
1273         lockdep_assert_held(&mvm->mutex);
1274
1275         spin_lock_bh(&mvm->d0i3_tx_lock);
1276
1277         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1278                 goto out;
1279
1280         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1281
1282         /* get the sta in order to update seq numbers and re-enqueue skbs */
1283         sta = rcu_dereference_protected(
1284                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1285                         lockdep_is_held(&mvm->mutex));
1286
1287         if (IS_ERR_OR_NULL(sta)) {
1288                 sta = NULL;
1289                 goto out;
1290         }
1291
1292         if (mvm->d0i3_offloading && qos_seq) {
1293                 /* update qos seq numbers if offloading was enabled */
1294                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1295                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1296                         u16 seq = le16_to_cpu(qos_seq[i]);
1297                         /* firmware stores last-used one, we store next one */
1298                         seq += 0x10;
1299                         mvm_ap_sta->tid_data[i].seq_number = seq;
1300                 }
1301         }
1302 out:
1303         /* re-enqueue (or drop) all packets */
1304         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1305                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1306
1307                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1308                         ieee80211_free_txskb(mvm->hw, skb);
1309
1310                 /* if the skb_queue is not empty, we need to wake queues */
1311                 wake_queues = true;
1312         }
1313         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1314         wake_up(&mvm->d0i3_exit_waitq);
1315         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1316         if (wake_queues)
1317                 ieee80211_wake_queues(mvm->hw);
1318
1319         spin_unlock_bh(&mvm->d0i3_tx_lock);
1320 }
1321
1322 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1323 {
1324         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1325         struct iwl_host_cmd get_status_cmd = {
1326                 .id = WOWLAN_GET_STATUSES,
1327                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1328         };
1329         struct iwl_wowlan_status *status;
1330         int ret;
1331         u32 handled_reasons, wakeup_reasons = 0;
1332         __le16 *qos_seq = NULL;
1333
1334         mutex_lock(&mvm->mutex);
1335         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1336         if (ret)
1337                 goto out;
1338
1339         if (!get_status_cmd.resp_pkt)
1340                 goto out;
1341
1342         status = (void *)get_status_cmd.resp_pkt->data;
1343         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1344         qos_seq = status->qos_seq_ctr;
1345
1346         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1347
1348         handled_reasons = IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1349                                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1350         if (wakeup_reasons & handled_reasons) {
1351                 struct iwl_mvm_wakeup_reason_iter_data data = {
1352                         .mvm = mvm,
1353                         .wakeup_reasons = wakeup_reasons,
1354                 };
1355
1356                 ieee80211_iterate_active_interfaces(
1357                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1358                         iwl_mvm_d0i3_wakeup_reason_iter, &data);
1359         }
1360 out:
1361         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1362
1363         IWL_DEBUG_INFO(mvm, "d0i3 exit completed (wakeup reasons: 0x%x)\n",
1364                        wakeup_reasons);
1365
1366         /* qos_seq might point inside resp_pkt, so free it only now */
1367         if (get_status_cmd.resp_pkt)
1368                 iwl_free_resp(&get_status_cmd);
1369
1370         /* the FW might have updated the regdomain */
1371         iwl_mvm_update_changed_regdom(mvm);
1372
1373         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1374         mutex_unlock(&mvm->mutex);
1375 }
1376
1377 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1378 {
1379         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1380                     CMD_WAKE_UP_TRANS;
1381         int ret;
1382
1383         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1384
1385         mutex_lock(&mvm->d0i3_suspend_mutex);
1386         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1387                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1388                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1389                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1390                 return 0;
1391         }
1392         mutex_unlock(&mvm->d0i3_suspend_mutex);
1393
1394         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1395         if (ret)
1396                 goto out;
1397
1398         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1399                                                    IEEE80211_IFACE_ITER_NORMAL,
1400                                                    iwl_mvm_exit_d0i3_iterator,
1401                                                    mvm);
1402 out:
1403         schedule_work(&mvm->d0i3_exit_work);
1404         return ret;
1405 }
1406
1407 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1408 {
1409         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1410
1411         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1412         return _iwl_mvm_exit_d0i3(mvm);
1413 }
1414
1415 #define IWL_MVM_COMMON_OPS                                      \
1416         /* these could be differentiated */                     \
1417         .queue_full = iwl_mvm_stop_sw_queue,                    \
1418         .queue_not_full = iwl_mvm_wake_sw_queue,                \
1419         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,              \
1420         .free_skb = iwl_mvm_free_skb,                           \
1421         .nic_error = iwl_mvm_nic_error,                         \
1422         .cmd_queue_full = iwl_mvm_cmd_queue_full,               \
1423         .nic_config = iwl_mvm_nic_config,                       \
1424         .enter_d0i3 = iwl_mvm_enter_d0i3,                       \
1425         .exit_d0i3 = iwl_mvm_exit_d0i3,                         \
1426         /* as we only register one, these MUST be common! */    \
1427         .start = iwl_op_mode_mvm_start,                         \
1428         .stop = iwl_op_mode_mvm_stop
1429
1430 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1431         IWL_MVM_COMMON_OPS,
1432         .rx = iwl_mvm_rx,
1433 };
1434
1435 static void iwl_mvm_rx_mq_rss(struct iwl_op_mode *op_mode,
1436                               struct napi_struct *napi,
1437                               struct iwl_rx_cmd_buffer *rxb,
1438                               unsigned int queue)
1439 {
1440         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1441
1442         iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
1443 }
1444
1445 static const struct iwl_op_mode_ops iwl_mvm_ops_mq = {
1446         IWL_MVM_COMMON_OPS,
1447         .rx = iwl_mvm_rx_mq,
1448         .rx_rss = iwl_mvm_rx_mq_rss,
1449 };