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 - 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  *
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  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  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
  86 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  88 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  89 MODULE_LICENSE("GPL");
  90
  91 static const struct iwl_op_mode_ops iwl_mvm_ops;
  92 static const struct iwl_op_mode_ops iwl_mvm_ops_mq;
  93
  94 struct iwl_mvm_mod_params iwlmvm_mod_params = {
  95         .power_scheme = IWL_POWER_SCHEME_BPS,
  96         .tfd_q_hang_detect = true
  97         /* rest of fields are 0 by default */
  98 };
  99
 100 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 101 MODULE_PARM_DESC(init_dbg,
 102                  "set to true to debug an ASSERT in INIT fw (default: false");
 103 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 104 MODULE_PARM_DESC(power_scheme,
 105                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 106 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
 107                    bool, S_IRUGO);
 108 MODULE_PARM_DESC(tfd_q_hang_detect,
 109                  "TFD queues hang detection (default: true");
 110
 111 /*
 112  * module init and exit functions
 113  */
 114 static int __init iwl_mvm_init(void)
 115 {
 116         int ret;
 117
 118         ret = iwl_mvm_rate_control_register();
 119         if (ret) {
 120                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 121                 return ret;
 122         }
 123
 124         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 125
 126         if (ret) {
 127                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 128                 iwl_mvm_rate_control_unregister();
 129         }
 130
 131         return ret;
 132 }
 133 module_init(iwl_mvm_init);
 134
 135 static void __exit iwl_mvm_exit(void)
 136 {
 137         iwl_opmode_deregister("iwlmvm");
 138         iwl_mvm_rate_control_unregister();
 139 }
 140 module_exit(iwl_mvm_exit);
 141
 142 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 143 {
 144         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 145         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 146         u32 reg_val = 0;
 147         u32 phy_config = iwl_mvm_get_phy_config(mvm);
 148
 149         radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 150                          FW_PHY_CFG_RADIO_TYPE_POS;
 151         radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
 152                          FW_PHY_CFG_RADIO_STEP_POS;
 153         radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
 154                          FW_PHY_CFG_RADIO_DASH_POS;
 155
 156         /* SKU control */
 157         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 158                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 159         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 160                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 161
 162         /* radio configuration */
 163         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 164         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 165         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 166
 167         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 168                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 169
 170         /*
 171          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 172          * shouldn't be set to any non-zero value. The same is supposed to be
 173          * true of the other HW, but unsetting them (such as the 7260) causes
 174          * automatic tests to fail on seemingly unrelated errors. Need to
 175          * further investigate this, but for now we'll separate cases.
 176          */
 177         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 178                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 179
 180         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 181                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 182                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 185                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 186                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 187                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 188                                 reg_val);
 189
 190         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 191                        radio_cfg_step, radio_cfg_dash);
 192
 193         /*
 194          * W/A : NIC is stuck in a reset state after Early PCIe power off
 195          * (PCIe power is lost before PERST# is asserted), causing ME FW
 196          * to lose ownership and not being able to obtain it back.
 197          */
 198         if (!mvm->trans->cfg->apmg_not_supported)
 199                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 200                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 201                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 202 }
 203
 204 struct iwl_rx_handlers {
 205         u16 cmd_id;
 206         bool async;
 207         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 208 };
 209
 210 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 211         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 212 #define RX_HANDLER_GRP(_grp, _cmd, _fn, _async) \
 213         { .cmd_id = WIDE_ID(_grp, _cmd), .fn = _fn, .async = _async }
 214
 215 /*
 216  * Handlers for fw notifications
 217  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 218  * This list should be in order of frequency for performance purposes.
 219  *
 220  * The handler can be SYNC - this means that it will be called in the Rx path
 221  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 222  * only in this case!), it should be set as ASYNC. In that case, it will be
 223  * called from a worker with mvm->mutex held.
 224  */
 225 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 226         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 227         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 228
 229         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 230         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 231         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 232         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 233                    iwl_mvm_rx_ant_coupling_notif, true),
 234
 235         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 236         RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
 237
 238         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 239
 240         RX_HANDLER(SCAN_ITERATION_COMPLETE,
 241                    iwl_mvm_rx_lmac_scan_iter_complete_notif, false),
 242         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 243                    iwl_mvm_rx_lmac_scan_complete_notif, true),
 244         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_match_found,
 245                    false),
 246         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 247                    true),
 248         RX_HANDLER(SCAN_ITERATION_COMPLETE_UMAC,
 249                    iwl_mvm_rx_umac_scan_iter_complete_notif, false),
 250
 251         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 252
 253         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 254                    false),
 255
 256         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 257         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 258                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 259         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 260         RX_HANDLER_GRP(PHY_OPS_GROUP, DTS_MEASUREMENT_NOTIF_WIDE,
 261                        iwl_mvm_temp_notif, true),
 262
 263         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 264                    true),
 265         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 266         RX_HANDLER(TOF_NOTIFICATION, iwl_mvm_tof_resp_handler, true),
 267
 268 };
 269 #undef RX_HANDLER
 270 #undef RX_HANDLER_GRP
 271 #define CMD(x) [x] = #x
 272
 273 static const char *const iwl_mvm_cmd_strings[REPLY_MAX + 1] = {
 274         CMD(MVM_ALIVE),
 275         CMD(REPLY_ERROR),
 276         CMD(ECHO_CMD),
 277         CMD(INIT_COMPLETE_NOTIF),
 278         CMD(PHY_CONTEXT_CMD),
 279         CMD(MGMT_MCAST_KEY),
 280         CMD(TX_CMD),
 281         CMD(TXPATH_FLUSH),
 282         CMD(SHARED_MEM_CFG),
 283         CMD(MAC_CONTEXT_CMD),
 284         CMD(TIME_EVENT_CMD),
 285         CMD(TIME_EVENT_NOTIFICATION),
 286         CMD(BINDING_CONTEXT_CMD),
 287         CMD(TIME_QUOTA_CMD),
 288         CMD(NON_QOS_TX_COUNTER_CMD),
 289         CMD(DC2DC_CONFIG_CMD),
 290         CMD(NVM_ACCESS_CMD),
 291         CMD(PHY_CONFIGURATION_CMD),
 292         CMD(CALIB_RES_NOTIF_PHY_DB),
 293         CMD(SET_CALIB_DEFAULT_CMD),
 294         CMD(FW_PAGING_BLOCK_CMD),
 295         CMD(ADD_STA_KEY),
 296         CMD(ADD_STA),
 297         CMD(FW_GET_ITEM_CMD),
 298         CMD(REMOVE_STA),
 299         CMD(LQ_CMD),
 300         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 301         CMD(MATCH_FOUND_NOTIFICATION),
 302         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 303         CMD(SCAN_OFFLOAD_ABORT_CMD),
 304         CMD(HOT_SPOT_CMD),
 305         CMD(SCAN_OFFLOAD_COMPLETE),
 306         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 307         CMD(SCAN_ITERATION_COMPLETE),
 308         CMD(POWER_TABLE_CMD),
 309         CMD(WEP_KEY),
 310         CMD(REPLY_RX_PHY_CMD),
 311         CMD(REPLY_RX_MPDU_CMD),
 312         CMD(BEACON_NOTIFICATION),
 313         CMD(BEACON_TEMPLATE_CMD),
 314         CMD(STATISTICS_CMD),
 315         CMD(STATISTICS_NOTIFICATION),
 316         CMD(EOSP_NOTIFICATION),
 317         CMD(REDUCE_TX_POWER_CMD),
 318         CMD(TX_ANT_CONFIGURATION_CMD),
 319         CMD(D3_CONFIG_CMD),
 320         CMD(D0I3_END_CMD),
 321         CMD(PROT_OFFLOAD_CONFIG_CMD),
 322         CMD(OFFLOADS_QUERY_CMD),
 323         CMD(REMOTE_WAKE_CONFIG_CMD),
 324         CMD(WOWLAN_PATTERNS),
 325         CMD(WOWLAN_CONFIGURATION),
 326         CMD(WOWLAN_TSC_RSC_PARAM),
 327         CMD(WOWLAN_TKIP_PARAM),
 328         CMD(WOWLAN_KEK_KCK_MATERIAL),
 329         CMD(WOWLAN_GET_STATUSES),
 330         CMD(WOWLAN_TX_POWER_PER_DB),
 331         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 332         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 333         CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
 334         CMD(CARD_STATE_NOTIFICATION),
 335         CMD(MISSED_BEACONS_NOTIFICATION),
 336         CMD(BT_COEX_PRIO_TABLE),
 337         CMD(BT_COEX_PROT_ENV),
 338         CMD(BT_PROFILE_NOTIFICATION),
 339         CMD(BT_CONFIG),
 340         CMD(MCAST_FILTER_CMD),
 341         CMD(BCAST_FILTER_CMD),
 342         CMD(REPLY_SF_CFG_CMD),
 343         CMD(REPLY_BEACON_FILTERING_CMD),
 344         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 345         CMD(DTS_MEASUREMENT_NOTIFICATION),
 346         CMD(REPLY_THERMAL_MNG_BACKOFF),
 347         CMD(MAC_PM_POWER_TABLE),
 348         CMD(LTR_CONFIG),
 349         CMD(BT_COEX_CI),
 350         CMD(BT_COEX_UPDATE_SW_BOOST),
 351         CMD(BT_COEX_UPDATE_CORUN_LUT),
 352         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 353         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 354         CMD(ANTENNA_COUPLING_NOTIFICATION),
 355         CMD(SCD_QUEUE_CFG),
 356         CMD(SCAN_CFG_CMD),
 357         CMD(SCAN_REQ_UMAC),
 358         CMD(SCAN_ABORT_UMAC),
 359         CMD(SCAN_COMPLETE_UMAC),
 360         CMD(TDLS_CHANNEL_SWITCH_CMD),
 361         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 362         CMD(TDLS_CONFIG_CMD),
 363         CMD(MCC_UPDATE_CMD),
 364         CMD(SCAN_ITERATION_COMPLETE_UMAC),
 365 };
 366 #undef CMD
 367
 368 /* this forward declaration can avoid to export the function */
 369 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 370 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 371
 372 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 373 {
 374         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 375
 376         if (!pwr_tx_backoff)
 377                 return 0;
 378
 379         while (pwr_tx_backoff->pwr) {
 380                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 381                         return pwr_tx_backoff->backoff;
 382
 383                 pwr_tx_backoff++;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 390
 391 static struct iwl_op_mode *
 392 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 393                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 394 {
 395         struct ieee80211_hw *hw;
 396         struct iwl_op_mode *op_mode;
 397         struct iwl_mvm *mvm;
 398         struct iwl_trans_config trans_cfg = {};
 399         static const u8 no_reclaim_cmds[] = {
 400                 TX_CMD,
 401         };
 402         int err, scan_size;
 403         u32 min_backoff;
 404
 405         /*
 406          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 407          * index all over the driver - check that its value corresponds to the
 408          * array size.
 409          */
 410         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 411
 412         /********************************
 413          * 1. Allocating and configuring HW data
 414          ********************************/
 415         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 416                                 sizeof(struct iwl_mvm),
 417                                 &iwl_mvm_hw_ops);
 418         if (!hw)
 419                 return NULL;
 420
 421         if (cfg->max_rx_agg_size)
 422                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 423
 424         if (cfg->max_tx_agg_size)
 425                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 426
 427         op_mode = hw->priv;
 428
 429         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 430         mvm->dev = trans->dev;
 431         mvm->trans = trans;
 432         mvm->cfg = cfg;
 433         mvm->fw = fw;
 434         mvm->hw = hw;
 435
 436         if (iwl_mvm_has_new_rx_api(mvm)) {
 437                 op_mode->ops = &iwl_mvm_ops_mq;
 438         } else {
 439                 op_mode->ops = &iwl_mvm_ops;
 440
 441                 if (WARN_ON(trans->num_rx_queues > 1))
 442                         goto out_free;
 443         }
 444
 445         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 446
 447         mvm->aux_queue = 15;
 448         mvm->first_agg_queue = 16;
 449         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 450         if (mvm->cfg->base_params->num_of_queues == 16) {
 451                 mvm->aux_queue = 11;
 452                 mvm->first_agg_queue = 12;
 453         }
 454         mvm->sf_state = SF_UNINIT;
 455         mvm->low_latency_agg_frame_limit = 6;
 456         mvm->cur_ucode = IWL_UCODE_INIT;
 457
 458         mutex_init(&mvm->mutex);
 459         mutex_init(&mvm->d0i3_suspend_mutex);
 460         spin_lock_init(&mvm->async_handlers_lock);
 461         INIT_LIST_HEAD(&mvm->time_event_list);
 462         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 463         INIT_LIST_HEAD(&mvm->async_handlers_list);
 464         spin_lock_init(&mvm->time_event_lock);
 465         spin_lock_init(&mvm->queue_info_lock);
 466
 467         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 468         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 469         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 470         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 471         INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
 472         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
 473
 474         spin_lock_init(&mvm->d0i3_tx_lock);
 475         spin_lock_init(&mvm->refs_lock);
 476         skb_queue_head_init(&mvm->d0i3_tx);
 477         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 478
 479         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 480
 481         /*
 482          * Populate the state variables that the transport layer needs
 483          * to know about.
 484          */
 485         trans_cfg.op_mode = op_mode;
 486         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 487         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 488         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 489         trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa,
 490                                                IWL_UCODE_TLV_API_WIDE_CMD_HDR);
 491
 492         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 493                 trans_cfg.bc_table_dword = true;
 494
 495         trans_cfg.command_names = iwl_mvm_cmd_strings;
 496
 497         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 498         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 499         trans_cfg.scd_set_active = true;
 500
 501         trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
 502
 503         /* Set a short watchdog for the command queue */
 504         trans_cfg.cmd_q_wdg_timeout =
 505                 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
 506
 507         snprintf(mvm->hw->wiphy->fw_version,
 508                  sizeof(mvm->hw->wiphy->fw_version),
 509                  "%s", fw->fw_version);
 510
 511         /* Configure transport layer */
 512         iwl_trans_configure(mvm->trans, &trans_cfg);
 513
 514         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 515         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 516         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 517         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 518         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 519                sizeof(trans->dbg_conf_tlv));
 520         trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
 521
 522         /* set up notification wait support */
 523         iwl_notification_wait_init(&mvm->notif_wait);
 524
 525         /* Init phy db */
 526         mvm->phy_db = iwl_phy_db_init(trans);
 527         if (!mvm->phy_db) {
 528                 IWL_ERR(mvm, "Cannot init phy_db\n");
 529                 goto out_free;
 530         }
 531
 532         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 533                  mvm->cfg->name, mvm->trans->hw_rev);
 534
 535         min_backoff = calc_min_backoff(trans, cfg);
 536         iwl_mvm_tt_initialize(mvm, min_backoff);
 537
 538         if (iwlwifi_mod_params.nvm_file)
 539                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 540         else
 541                 IWL_DEBUG_EEPROM(mvm->trans->dev,
 542                                  "working without external nvm file\n");
 543
 544         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 545                  "not allowing power-up and not having nvm_file\n"))
 546                 goto out_free;
 547
 548         /*
 549          * Even if nvm exists in the nvm_file driver should read again the nvm
 550          * from the nic because there might be entries that exist in the OTP
 551          * and not in the file.
 552          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 553          */
 554         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 555                 err = iwl_nvm_init(mvm, false);
 556                 if (err)
 557                         goto out_free;
 558         } else {
 559                 err = iwl_trans_start_hw(mvm->trans);
 560                 if (err)
 561                         goto out_free;
 562
 563                 mutex_lock(&mvm->mutex);
 564                 err = iwl_run_init_mvm_ucode(mvm, true);
 565                 if (!err || !iwlmvm_mod_params.init_dbg)
 566                         iwl_trans_stop_device(trans);
 567                 mutex_unlock(&mvm->mutex);
 568                 /* returns 0 if successful, 1 if success but in rfkill */
 569                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 570                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 571                         goto out_free;
 572                 }
 573         }
 574
 575         scan_size = iwl_mvm_scan_size(mvm);
 576
 577         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 578         if (!mvm->scan_cmd)
 579                 goto out_free;
 580
 581         /* Set EBS as successful as long as not stated otherwise by the FW. */
 582         mvm->last_ebs_successful = true;
 583
 584         err = iwl_mvm_mac_setup_register(mvm);
 585         if (err)
 586                 goto out_free;
 587
 588         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 589         if (err)
 590                 goto out_unregister;
 591
 592         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 593
 594         /* rpm starts with a taken ref. only set the appropriate bit here. */
 595         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 596
 597         iwl_mvm_tof_init(mvm);
 598
 599         return op_mode;
 600
 601  out_unregister:
 602         ieee80211_unregister_hw(mvm->hw);
 603         iwl_mvm_leds_exit(mvm);
 604  out_free:
 605         flush_delayed_work(&mvm->fw_dump_wk);
 606         iwl_phy_db_free(mvm->phy_db);
 607         kfree(mvm->scan_cmd);
 608         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 609                 iwl_trans_op_mode_leave(trans);
 610         ieee80211_free_hw(mvm->hw);
 611         return NULL;
 612 }
 613
 614 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 615 {
 616         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 617         int i;
 618
 619         iwl_mvm_leds_exit(mvm);
 620
 621         iwl_mvm_tt_exit(mvm);
 622
 623         ieee80211_unregister_hw(mvm->hw);
 624
 625         kfree(mvm->scan_cmd);
 626         kfree(mvm->mcast_filter_cmd);
 627         mvm->mcast_filter_cmd = NULL;
 628
 629 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 630         kfree(mvm->d3_resume_sram);
 631         if (mvm->nd_config) {
 632                 kfree(mvm->nd_config->match_sets);
 633                 kfree(mvm->nd_config->scan_plans);
 634                 kfree(mvm->nd_config);
 635                 mvm->nd_config = NULL;
 636         }
 637 #endif
 638
 639         iwl_trans_op_mode_leave(mvm->trans);
 640
 641         iwl_phy_db_free(mvm->phy_db);
 642         mvm->phy_db = NULL;
 643
 644         iwl_free_nvm_data(mvm->nvm_data);
 645         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 646                 kfree(mvm->nvm_sections[i].data);
 647
 648         iwl_mvm_tof_clean(mvm);
 649
 650         ieee80211_free_hw(mvm->hw);
 651 }
 652
 653 struct iwl_async_handler_entry {
 654         struct list_head list;
 655         struct iwl_rx_cmd_buffer rxb;
 656         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 657 };
 658
 659 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 660 {
 661         struct iwl_async_handler_entry *entry, *tmp;
 662
 663         spin_lock_bh(&mvm->async_handlers_lock);
 664         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 665                 iwl_free_rxb(&entry->rxb);
 666                 list_del(&entry->list);
 667                 kfree(entry);
 668         }
 669         spin_unlock_bh(&mvm->async_handlers_lock);
 670 }
 671
 672 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 673 {
 674         struct iwl_mvm *mvm =
 675                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 676         struct iwl_async_handler_entry *entry, *tmp;
 677         struct list_head local_list;
 678
 679         INIT_LIST_HEAD(&local_list);
 680
 681         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 682         mutex_lock(&mvm->mutex);
 683
 684         /*
 685          * Sync with Rx path with a lock. Remove all the entries from this list,
 686          * add them to a local one (lock free), and then handle them.
 687          */
 688         spin_lock_bh(&mvm->async_handlers_lock);
 689         list_splice_init(&mvm->async_handlers_list, &local_list);
 690         spin_unlock_bh(&mvm->async_handlers_lock);
 691
 692         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 693                 entry->fn(mvm, &entry->rxb);
 694                 iwl_free_rxb(&entry->rxb);
 695                 list_del(&entry->list);
 696                 kfree(entry);
 697         }
 698         mutex_unlock(&mvm->mutex);
 699 }
 700
 701 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
 702                                             struct iwl_rx_packet *pkt)
 703 {
 704         struct iwl_fw_dbg_trigger_tlv *trig;
 705         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
 706         int i;
 707
 708         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
 709                 return;
 710
 711         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
 712         cmds_trig = (void *)trig->data;
 713
 714         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 715                 return;
 716
 717         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
 718                 /* don't collect on CMD 0 */
 719                 if (!cmds_trig->cmds[i].cmd_id)
 720                         break;
 721
 722                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd ||
 723                     cmds_trig->cmds[i].group_id != pkt->hdr.group_id)
 724                         continue;
 725
 726                 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
 727                                             "CMD 0x%02x.%02x received",
 728                                             pkt->hdr.group_id, pkt->hdr.cmd);
 729                 break;
 730         }
 731 }
 732
 733 static void iwl_mvm_rx_common(struct iwl_mvm *mvm,
 734                               struct iwl_rx_cmd_buffer *rxb,
 735                               struct iwl_rx_packet *pkt)
 736 {
 737         int i;
 738
 739         iwl_mvm_rx_check_trigger(mvm, pkt);
 740
 741         /*
 742          * Do the notification wait before RX handlers so
 743          * even if the RX handler consumes the RXB we have
 744          * access to it in the notification wait entry.
 745          */
 746         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 747
 748         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 749                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 750                 struct iwl_async_handler_entry *entry;
 751
 752                 if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
 753                         continue;
 754
 755                 if (!rx_h->async) {
 756                         rx_h->fn(mvm, rxb);
 757                         return;
 758                 }
 759
 760                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 761                 /* we can't do much... */
 762                 if (!entry)
 763                         return;
 764
 765                 entry->rxb._page = rxb_steal_page(rxb);
 766                 entry->rxb._offset = rxb->_offset;
 767                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 768                 entry->fn = rx_h->fn;
 769                 spin_lock(&mvm->async_handlers_lock);
 770                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 771                 spin_unlock(&mvm->async_handlers_lock);
 772                 schedule_work(&mvm->async_handlers_wk);
 773                 break;
 774         }
 775 }
 776
 777 static void iwl_mvm_rx(struct iwl_op_mode *op_mode,
 778                        struct napi_struct *napi,
 779                        struct iwl_rx_cmd_buffer *rxb)
 780 {
 781         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 782         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 783
 784         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
 785                 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
 786         else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
 787                 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
 788         else
 789                 iwl_mvm_rx_common(mvm, rxb, pkt);
 790 }
 791
 792 static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
 793                           struct napi_struct *napi,
 794                           struct iwl_rx_cmd_buffer *rxb)
 795 {
 796         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 797         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 798
 799         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
 800                 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
 801         else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
 802                 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
 803         else
 804                 iwl_mvm_rx_common(mvm, rxb, pkt);
 805 }
 806
 807 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 808 {
 809         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 810         unsigned long mq;
 811         int q;
 812
 813         spin_lock_bh(&mvm->queue_info_lock);
 814         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
 815         spin_unlock_bh(&mvm->queue_info_lock);
 816
 817         if (WARN_ON_ONCE(!mq))
 818                 return;
 819
 820         for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
 821                 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[q]) > 1) {
 822                         IWL_DEBUG_TX_QUEUES(mvm,
 823                                             "queue %d (mac80211 %d) already stopped\n",
 824                                             queue, q);
 825                         continue;
 826                 }
 827
 828                 ieee80211_stop_queue(mvm->hw, q);
 829         }
 830 }
 831
 832 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 833 {
 834         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 835         unsigned long mq;
 836         int q;
 837
 838         spin_lock_bh(&mvm->queue_info_lock);
 839         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
 840         spin_unlock_bh(&mvm->queue_info_lock);
 841
 842         if (WARN_ON_ONCE(!mq))
 843                 return;
 844
 845         for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
 846                 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[q]) > 0) {
 847                         IWL_DEBUG_TX_QUEUES(mvm,
 848                                             "queue %d (mac80211 %d) still stopped\n",
 849                                             queue, q);
 850                         continue;
 851                 }
 852
 853                 ieee80211_wake_queue(mvm->hw, q);
 854         }
 855 }
 856
 857 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 858 {
 859         if (state)
 860                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 861         else
 862                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 863
 864         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 865 }
 866
 867 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 868 {
 869         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 870         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 871
 872         if (state)
 873                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 874         else
 875                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 876
 877         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 878
 879         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 880         if (calibrating)
 881                 iwl_abort_notification_waits(&mvm->notif_wait);
 882
 883         /*
 884          * Stop the device if we run OPERATIONAL firmware or if we are in the
 885          * middle of the calibrations.
 886          */
 887         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 888 }
 889
 890 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 891 {
 892         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 893         struct ieee80211_tx_info *info;
 894
 895         info = IEEE80211_SKB_CB(skb);
 896         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 897         ieee80211_free_txskb(mvm->hw, skb);
 898 }
 899
 900 struct iwl_mvm_reprobe {
 901         struct device *dev;
 902         struct work_struct work;
 903 };
 904
 905 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 906 {
 907         struct iwl_mvm_reprobe *reprobe;
 908
 909         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 910         if (device_reprobe(reprobe->dev))
 911                 dev_err(reprobe->dev, "reprobe failed!\n");
 912         kfree(reprobe);
 913         module_put(THIS_MODULE);
 914 }
 915
 916 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 917 {
 918         struct iwl_mvm *mvm =
 919                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 920
 921         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 922                 return;
 923
 924         mutex_lock(&mvm->mutex);
 925
 926         /* stop recording */
 927         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
 928                 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
 929         } else {
 930                 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
 931                 /* wait before we collect the data till the DBGC stop */
 932                 udelay(100);
 933         }
 934
 935         iwl_mvm_fw_error_dump(mvm);
 936
 937         /* start recording again if the firmware is not crashed */
 938         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 939                      mvm->fw->dbg_dest_tlv &&
 940                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 941
 942         mutex_unlock(&mvm->mutex);
 943
 944         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 945 }
 946
 947 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 948 {
 949         iwl_abort_notification_waits(&mvm->notif_wait);
 950
 951         /*
 952          * This is a bit racy, but worst case we tell mac80211 about
 953          * a stopped/aborted scan when that was already done which
 954          * is not a problem. It is necessary to abort any os scan
 955          * here because mac80211 requires having the scan cleared
 956          * before restarting.
 957          * We'll reset the scan_status to NONE in restart cleanup in
 958          * the next start() call from mac80211. If restart isn't called
 959          * (no fw restart) scan status will stay busy.
 960          */
 961         iwl_mvm_report_scan_aborted(mvm);
 962
 963         /*
 964          * If we're restarting already, don't cycle restarts.
 965          * If INIT fw asserted, it will likely fail again.
 966          * If WoWLAN fw asserted, don't restart either, mac80211
 967          * can't recover this since we're already half suspended.
 968          */
 969         if (!mvm->restart_fw && fw_error) {
 970                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert,
 971                                             NULL);
 972         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 973                                     &mvm->status)) {
 974                 struct iwl_mvm_reprobe *reprobe;
 975
 976                 IWL_ERR(mvm,
 977                         "Firmware error during reconfiguration - reprobe!\n");
 978
 979                 /*
 980                  * get a module reference to avoid doing this while unloading
 981                  * anyway and to avoid scheduling a work with code that's
 982                  * being removed.
 983                  */
 984                 if (!try_module_get(THIS_MODULE)) {
 985                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 986                         return;
 987                 }
 988
 989                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 990                 if (!reprobe) {
 991                         module_put(THIS_MODULE);
 992                         return;
 993                 }
 994                 reprobe->dev = mvm->trans->dev;
 995                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 996                 schedule_work(&reprobe->work);
 997         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 998                 /* don't let the transport/FW power down */
 999                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1000
1001                 if (fw_error && mvm->restart_fw > 0)
1002                         mvm->restart_fw--;
1003                 ieee80211_restart_hw(mvm->hw);
1004         }
1005 }
1006
1007 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
1008 {
1009         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1010
1011         iwl_mvm_dump_nic_error_log(mvm);
1012
1013         iwl_mvm_nic_restart(mvm, true);
1014 }
1015
1016 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
1017 {
1018         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1019
1020         WARN_ON(1);
1021         iwl_mvm_nic_restart(mvm, true);
1022 }
1023
1024 struct iwl_d0i3_iter_data {
1025         struct iwl_mvm *mvm;
1026         u8 ap_sta_id;
1027         u8 vif_count;
1028         u8 offloading_tid;
1029         bool disable_offloading;
1030 };
1031
1032 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
1033                                         struct ieee80211_vif *vif,
1034                                         struct iwl_d0i3_iter_data *iter_data)
1035 {
1036         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1037         struct ieee80211_sta *ap_sta;
1038         struct iwl_mvm_sta *mvmsta;
1039         u32 available_tids = 0;
1040         u8 tid;
1041
1042         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
1043                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
1044                 return false;
1045
1046         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
1047         if (IS_ERR_OR_NULL(ap_sta))
1048                 return false;
1049
1050         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
1051         spin_lock_bh(&mvmsta->lock);
1052         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1053                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1054
1055                 /*
1056                  * in case of pending tx packets, don't use this tid
1057                  * for offloading in order to prevent reuse of the same
1058                  * qos seq counters.
1059                  */
1060                 if (iwl_mvm_tid_queued(tid_data))
1061                         continue;
1062
1063                 if (tid_data->state != IWL_AGG_OFF)
1064                         continue;
1065
1066                 available_tids |= BIT(tid);
1067         }
1068         spin_unlock_bh(&mvmsta->lock);
1069
1070         /*
1071          * disallow protocol offloading if we have no available tid
1072          * (with no pending frames and no active aggregation,
1073          * as we don't handle "holes" properly - the scheduler needs the
1074          * frame's seq number and TFD index to match)
1075          */
1076         if (!available_tids)
1077                 return true;
1078
1079         /* for simplicity, just use the first available tid */
1080         iter_data->offloading_tid = ffs(available_tids) - 1;
1081         return false;
1082 }
1083
1084 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1085                                         struct ieee80211_vif *vif)
1086 {
1087         struct iwl_d0i3_iter_data *data = _data;
1088         struct iwl_mvm *mvm = data->mvm;
1089         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1090         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1091
1092         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1093         if (vif->type != NL80211_IFTYPE_STATION ||
1094             !vif->bss_conf.assoc)
1095                 return;
1096
1097         /*
1098          * in case of pending tx packets or active aggregations,
1099          * avoid offloading features in order to prevent reuse of
1100          * the same qos seq counters.
1101          */
1102         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1103                 data->disable_offloading = true;
1104
1105         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1106         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1107
1108         /*
1109          * on init/association, mvm already configures POWER_TABLE_CMD
1110          * and REPLY_MCAST_FILTER_CMD, so currently don't
1111          * reconfigure them (we might want to use different
1112          * params later on, though).
1113          */
1114         data->ap_sta_id = mvmvif->ap_sta_id;
1115         data->vif_count++;
1116 }
1117
1118 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1119                                     struct iwl_wowlan_config_cmd *cmd,
1120                                     struct iwl_d0i3_iter_data *iter_data)
1121 {
1122         struct ieee80211_sta *ap_sta;
1123         struct iwl_mvm_sta *mvm_ap_sta;
1124
1125         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1126                 return;
1127
1128         rcu_read_lock();
1129
1130         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1131         if (IS_ERR_OR_NULL(ap_sta))
1132                 goto out;
1133
1134         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1135         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1136         cmd->offloading_tid = iter_data->offloading_tid;
1137
1138         /*
1139          * The d0i3 uCode takes care of the nonqos counters,
1140          * so configure only the qos seq ones.
1141          */
1142         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1143 out:
1144         rcu_read_unlock();
1145 }
1146
1147 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1148 {
1149         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1150         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1151         int ret;
1152         struct iwl_d0i3_iter_data d0i3_iter_data = {
1153                 .mvm = mvm,
1154         };
1155         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1156                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1157                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1158                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1159                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1160         };
1161         struct iwl_d3_manager_config d3_cfg_cmd = {
1162                 .min_sleep_time = cpu_to_le32(1000),
1163                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1164         };
1165
1166         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1167
1168         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1169
1170         /*
1171          * iwl_mvm_ref_sync takes a reference before checking the flag.
1172          * so by checking there is no held reference we prevent a state
1173          * in which iwl_mvm_ref_sync continues successfully while we
1174          * configure the firmware to enter d0i3
1175          */
1176         if (iwl_mvm_ref_taken(mvm)) {
1177                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1178                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1179                 wake_up(&mvm->d0i3_exit_waitq);
1180                 return 1;
1181         }
1182
1183         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1184                                                    IEEE80211_IFACE_ITER_NORMAL,
1185                                                    iwl_mvm_enter_d0i3_iterator,
1186                                                    &d0i3_iter_data);
1187         if (d0i3_iter_data.vif_count == 1) {
1188                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1189                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1190         } else {
1191                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1192                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1193                 mvm->d0i3_offloading = false;
1194         }
1195
1196         /* make sure we have no running tx while configuring the seqno */
1197         synchronize_net();
1198
1199         /* configure wowlan configuration only if needed */
1200         if (mvm->d0i3_ap_sta_id != IWL_MVM_STATION_COUNT) {
1201                 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd,
1202                                         &d0i3_iter_data);
1203
1204                 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1205                                            sizeof(wowlan_config_cmd),
1206                                            &wowlan_config_cmd);
1207                 if (ret)
1208                         return ret;
1209         }
1210
1211         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1212                                     flags | CMD_MAKE_TRANS_IDLE,
1213                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1214 }
1215
1216 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1217                                        struct ieee80211_vif *vif)
1218 {
1219         struct iwl_mvm *mvm = _data;
1220         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1221
1222         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1223         if (vif->type != NL80211_IFTYPE_STATION ||
1224             !vif->bss_conf.assoc)
1225                 return;
1226
1227         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1228 }
1229
1230 struct iwl_mvm_wakeup_reason_iter_data {
1231         struct iwl_mvm *mvm;
1232         u32 wakeup_reasons;
1233 };
1234
1235 static void iwl_mvm_d0i3_wakeup_reason_iter(void *_data, u8 *mac,
1236                                             struct ieee80211_vif *vif)
1237 {
1238         struct iwl_mvm_wakeup_reason_iter_data *data = _data;
1239         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1240
1241         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1242             data->mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) {
1243                 if (data->wakeup_reasons &
1244                     IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH)
1245                         iwl_mvm_connection_loss(data->mvm, vif, "D0i3");
1246                 else
1247                         ieee80211_beacon_loss(vif);
1248         }
1249 }
1250
1251 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1252 {
1253         struct ieee80211_sta *sta = NULL;
1254         struct iwl_mvm_sta *mvm_ap_sta;
1255         int i;
1256         bool wake_queues = false;
1257
1258         lockdep_assert_held(&mvm->mutex);
1259
1260         spin_lock_bh(&mvm->d0i3_tx_lock);
1261
1262         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1263                 goto out;
1264
1265         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1266
1267         /* get the sta in order to update seq numbers and re-enqueue skbs */
1268         sta = rcu_dereference_protected(
1269                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1270                         lockdep_is_held(&mvm->mutex));
1271
1272         if (IS_ERR_OR_NULL(sta)) {
1273                 sta = NULL;
1274                 goto out;
1275         }
1276
1277         if (mvm->d0i3_offloading && qos_seq) {
1278                 /* update qos seq numbers if offloading was enabled */
1279                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1280                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1281                         u16 seq = le16_to_cpu(qos_seq[i]);
1282                         /* firmware stores last-used one, we store next one */
1283                         seq += 0x10;
1284                         mvm_ap_sta->tid_data[i].seq_number = seq;
1285                 }
1286         }
1287 out:
1288         /* re-enqueue (or drop) all packets */
1289         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1290                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1291
1292                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1293                         ieee80211_free_txskb(mvm->hw, skb);
1294
1295                 /* if the skb_queue is not empty, we need to wake queues */
1296                 wake_queues = true;
1297         }
1298         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1299         wake_up(&mvm->d0i3_exit_waitq);
1300         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1301         if (wake_queues)
1302                 ieee80211_wake_queues(mvm->hw);
1303
1304         spin_unlock_bh(&mvm->d0i3_tx_lock);
1305 }
1306
1307 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1308 {
1309         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1310         struct iwl_host_cmd get_status_cmd = {
1311                 .id = WOWLAN_GET_STATUSES,
1312                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1313         };
1314         struct iwl_wowlan_status *status;
1315         int ret;
1316         u32 handled_reasons, wakeup_reasons = 0;
1317         __le16 *qos_seq = NULL;
1318
1319         mutex_lock(&mvm->mutex);
1320         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1321         if (ret)
1322                 goto out;
1323
1324         if (!get_status_cmd.resp_pkt)
1325                 goto out;
1326
1327         status = (void *)get_status_cmd.resp_pkt->data;
1328         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1329         qos_seq = status->qos_seq_ctr;
1330
1331         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1332
1333         handled_reasons = IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1334                                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1335         if (wakeup_reasons & handled_reasons) {
1336                 struct iwl_mvm_wakeup_reason_iter_data data = {
1337                         .mvm = mvm,
1338                         .wakeup_reasons = wakeup_reasons,
1339                 };
1340
1341                 ieee80211_iterate_active_interfaces(
1342                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1343                         iwl_mvm_d0i3_wakeup_reason_iter, &data);
1344         }
1345 out:
1346         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1347
1348         IWL_DEBUG_INFO(mvm, "d0i3 exit completed (wakeup reasons: 0x%x)\n",
1349                        wakeup_reasons);
1350
1351         /* qos_seq might point inside resp_pkt, so free it only now */
1352         if (get_status_cmd.resp_pkt)
1353                 iwl_free_resp(&get_status_cmd);
1354
1355         /* the FW might have updated the regdomain */
1356         iwl_mvm_update_changed_regdom(mvm);
1357
1358         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1359         mutex_unlock(&mvm->mutex);
1360 }
1361
1362 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1363 {
1364         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1365                     CMD_WAKE_UP_TRANS;
1366         int ret;
1367
1368         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1369
1370         mutex_lock(&mvm->d0i3_suspend_mutex);
1371         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1372                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1373                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1374                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1375                 return 0;
1376         }
1377         mutex_unlock(&mvm->d0i3_suspend_mutex);
1378
1379         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1380         if (ret)
1381                 goto out;
1382
1383         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1384                                                    IEEE80211_IFACE_ITER_NORMAL,
1385                                                    iwl_mvm_exit_d0i3_iterator,
1386                                                    mvm);
1387 out:
1388         schedule_work(&mvm->d0i3_exit_work);
1389         return ret;
1390 }
1391
1392 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1393 {
1394         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1395
1396         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1397         return _iwl_mvm_exit_d0i3(mvm);
1398 }
1399
1400 #define IWL_MVM_COMMON_OPS                                      \
1401         /* these could be differentiated */                     \
1402         .queue_full = iwl_mvm_stop_sw_queue,                    \
1403         .queue_not_full = iwl_mvm_wake_sw_queue,                \
1404         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,              \
1405         .free_skb = iwl_mvm_free_skb,                           \
1406         .nic_error = iwl_mvm_nic_error,                         \
1407         .cmd_queue_full = iwl_mvm_cmd_queue_full,               \
1408         .nic_config = iwl_mvm_nic_config,                       \
1409         .enter_d0i3 = iwl_mvm_enter_d0i3,                       \
1410         .exit_d0i3 = iwl_mvm_exit_d0i3,                         \
1411         /* as we only register one, these MUST be common! */    \
1412         .start = iwl_op_mode_mvm_start,                         \
1413         .stop = iwl_op_mode_mvm_stop
1414
1415 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1416         IWL_MVM_COMMON_OPS,
1417         .rx = iwl_mvm_rx,
1418 };
1419
1420 static void iwl_mvm_rx_mq_rss(struct iwl_op_mode *op_mode,
1421                               struct napi_struct *napi,
1422                               struct iwl_rx_cmd_buffer *rxb,
1423                               unsigned int queue)
1424 {
1425         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1426
1427         iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
1428 }
1429
1430 static const struct iwl_op_mode_ops iwl_mvm_ops_mq = {
1431         IWL_MVM_COMMON_OPS,
1432         .rx = iwl_mvm_rx_mq,
1433         .rx_rss = iwl_mvm_rx_mq_rss,
1434 };