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         iwl_phy_db_free(mvm->phy_db);
 606         kfree(mvm->scan_cmd);
 607         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 608                 iwl_trans_op_mode_leave(trans);
 609         ieee80211_free_hw(mvm->hw);
 610         return NULL;
 611 }
 612
 613 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 614 {
 615         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 616         int i;
 617
 618         iwl_mvm_leds_exit(mvm);
 619
 620         iwl_mvm_tt_exit(mvm);
 621
 622         ieee80211_unregister_hw(mvm->hw);
 623
 624         kfree(mvm->scan_cmd);
 625         kfree(mvm->mcast_filter_cmd);
 626         mvm->mcast_filter_cmd = NULL;
 627
 628 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 629         kfree(mvm->d3_resume_sram);
 630         if (mvm->nd_config) {
 631                 kfree(mvm->nd_config->match_sets);
 632                 kfree(mvm->nd_config->scan_plans);
 633                 kfree(mvm->nd_config);
 634                 mvm->nd_config = NULL;
 635         }
 636 #endif
 637
 638         iwl_trans_op_mode_leave(mvm->trans);
 639
 640         iwl_phy_db_free(mvm->phy_db);
 641         mvm->phy_db = NULL;
 642
 643         iwl_free_nvm_data(mvm->nvm_data);
 644         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 645                 kfree(mvm->nvm_sections[i].data);
 646
 647         iwl_mvm_tof_clean(mvm);
 648
 649         ieee80211_free_hw(mvm->hw);
 650 }
 651
 652 struct iwl_async_handler_entry {
 653         struct list_head list;
 654         struct iwl_rx_cmd_buffer rxb;
 655         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 656 };
 657
 658 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 659 {
 660         struct iwl_async_handler_entry *entry, *tmp;
 661
 662         spin_lock_bh(&mvm->async_handlers_lock);
 663         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 664                 iwl_free_rxb(&entry->rxb);
 665                 list_del(&entry->list);
 666                 kfree(entry);
 667         }
 668         spin_unlock_bh(&mvm->async_handlers_lock);
 669 }
 670
 671 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 672 {
 673         struct iwl_mvm *mvm =
 674                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 675         struct iwl_async_handler_entry *entry, *tmp;
 676         struct list_head local_list;
 677
 678         INIT_LIST_HEAD(&local_list);
 679
 680         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 681         mutex_lock(&mvm->mutex);
 682
 683         /*
 684          * Sync with Rx path with a lock. Remove all the entries from this list,
 685          * add them to a local one (lock free), and then handle them.
 686          */
 687         spin_lock_bh(&mvm->async_handlers_lock);
 688         list_splice_init(&mvm->async_handlers_list, &local_list);
 689         spin_unlock_bh(&mvm->async_handlers_lock);
 690
 691         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 692                 entry->fn(mvm, &entry->rxb);
 693                 iwl_free_rxb(&entry->rxb);
 694                 list_del(&entry->list);
 695                 kfree(entry);
 696         }
 697         mutex_unlock(&mvm->mutex);
 698 }
 699
 700 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
 701                                             struct iwl_rx_packet *pkt)
 702 {
 703         struct iwl_fw_dbg_trigger_tlv *trig;
 704         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
 705         int i;
 706
 707         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
 708                 return;
 709
 710         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
 711         cmds_trig = (void *)trig->data;
 712
 713         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 714                 return;
 715
 716         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
 717                 /* don't collect on CMD 0 */
 718                 if (!cmds_trig->cmds[i].cmd_id)
 719                         break;
 720
 721                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd ||
 722                     cmds_trig->cmds[i].group_id != pkt->hdr.group_id)
 723                         continue;
 724
 725                 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
 726                                             "CMD 0x%02x.%02x received",
 727                                             pkt->hdr.group_id, pkt->hdr.cmd);
 728                 break;
 729         }
 730 }
 731
 732 static void iwl_mvm_rx_common(struct iwl_mvm *mvm,
 733                               struct iwl_rx_cmd_buffer *rxb,
 734                               struct iwl_rx_packet *pkt)
 735 {
 736         int i;
 737
 738         iwl_mvm_rx_check_trigger(mvm, pkt);
 739
 740         /*
 741          * Do the notification wait before RX handlers so
 742          * even if the RX handler consumes the RXB we have
 743          * access to it in the notification wait entry.
 744          */
 745         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 746
 747         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 748                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 749                 struct iwl_async_handler_entry *entry;
 750
 751                 if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
 752                         continue;
 753
 754                 if (!rx_h->async) {
 755                         rx_h->fn(mvm, rxb);
 756                         return;
 757                 }
 758
 759                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 760                 /* we can't do much... */
 761                 if (!entry)
 762                         return;
 763
 764                 entry->rxb._page = rxb_steal_page(rxb);
 765                 entry->rxb._offset = rxb->_offset;
 766                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 767                 entry->fn = rx_h->fn;
 768                 spin_lock(&mvm->async_handlers_lock);
 769                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 770                 spin_unlock(&mvm->async_handlers_lock);
 771                 schedule_work(&mvm->async_handlers_wk);
 772                 break;
 773         }
 774 }
 775
 776 static void iwl_mvm_rx(struct iwl_op_mode *op_mode,
 777                        struct napi_struct *napi,
 778                        struct iwl_rx_cmd_buffer *rxb)
 779 {
 780         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 781         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 782
 783         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
 784                 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
 785         else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
 786                 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
 787         else
 788                 iwl_mvm_rx_common(mvm, rxb, pkt);
 789 }
 790
 791 static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
 792                           struct napi_struct *napi,
 793                           struct iwl_rx_cmd_buffer *rxb)
 794 {
 795         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 796         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 797
 798         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
 799                 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
 800         else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
 801                 iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
 802         else
 803                 iwl_mvm_rx_common(mvm, rxb, pkt);
 804 }
 805
 806 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 807 {
 808         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 809         unsigned long mq;
 810         int q;
 811
 812         spin_lock_bh(&mvm->queue_info_lock);
 813         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
 814         spin_unlock_bh(&mvm->queue_info_lock);
 815
 816         if (WARN_ON_ONCE(!mq))
 817                 return;
 818
 819         for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
 820                 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[q]) > 1) {
 821                         IWL_DEBUG_TX_QUEUES(mvm,
 822                                             "queue %d (mac80211 %d) already stopped\n",
 823                                             queue, q);
 824                         continue;
 825                 }
 826
 827                 ieee80211_stop_queue(mvm->hw, q);
 828         }
 829 }
 830
 831 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 832 {
 833         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 834         unsigned long mq;
 835         int q;
 836
 837         spin_lock_bh(&mvm->queue_info_lock);
 838         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
 839         spin_unlock_bh(&mvm->queue_info_lock);
 840
 841         if (WARN_ON_ONCE(!mq))
 842                 return;
 843
 844         for_each_set_bit(q, &mq, IEEE80211_MAX_QUEUES) {
 845                 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[q]) > 0) {
 846                         IWL_DEBUG_TX_QUEUES(mvm,
 847                                             "queue %d (mac80211 %d) still stopped\n",
 848                                             queue, q);
 849                         continue;
 850                 }
 851
 852                 ieee80211_wake_queue(mvm->hw, q);
 853         }
 854 }
 855
 856 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 857 {
 858         if (state)
 859                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 860         else
 861                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 862
 863         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 864 }
 865
 866 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 867 {
 868         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 869         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 870
 871         if (state)
 872                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 873         else
 874                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 875
 876         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 877
 878         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 879         if (calibrating)
 880                 iwl_abort_notification_waits(&mvm->notif_wait);
 881
 882         /*
 883          * Stop the device if we run OPERATIONAL firmware or if we are in the
 884          * middle of the calibrations.
 885          */
 886         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 887 }
 888
 889 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 890 {
 891         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 892         struct ieee80211_tx_info *info;
 893
 894         info = IEEE80211_SKB_CB(skb);
 895         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 896         ieee80211_free_txskb(mvm->hw, skb);
 897 }
 898
 899 struct iwl_mvm_reprobe {
 900         struct device *dev;
 901         struct work_struct work;
 902 };
 903
 904 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 905 {
 906         struct iwl_mvm_reprobe *reprobe;
 907
 908         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 909         if (device_reprobe(reprobe->dev))
 910                 dev_err(reprobe->dev, "reprobe failed!\n");
 911         kfree(reprobe);
 912         module_put(THIS_MODULE);
 913 }
 914
 915 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 916 {
 917         struct iwl_mvm *mvm =
 918                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 919
 920         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 921                 return;
 922
 923         mutex_lock(&mvm->mutex);
 924
 925         /* stop recording */
 926         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
 927                 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
 928         } else {
 929                 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
 930                 /* wait before we collect the data till the DBGC stop */
 931                 udelay(100);
 932         }
 933
 934         iwl_mvm_fw_error_dump(mvm);
 935
 936         /* start recording again if the firmware is not crashed */
 937         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 938                      mvm->fw->dbg_dest_tlv &&
 939                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 940
 941         mutex_unlock(&mvm->mutex);
 942
 943         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 944 }
 945
 946 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 947 {
 948         iwl_abort_notification_waits(&mvm->notif_wait);
 949
 950         /*
 951          * This is a bit racy, but worst case we tell mac80211 about
 952          * a stopped/aborted scan when that was already done which
 953          * is not a problem. It is necessary to abort any os scan
 954          * here because mac80211 requires having the scan cleared
 955          * before restarting.
 956          * We'll reset the scan_status to NONE in restart cleanup in
 957          * the next start() call from mac80211. If restart isn't called
 958          * (no fw restart) scan status will stay busy.
 959          */
 960         iwl_mvm_report_scan_aborted(mvm);
 961
 962         /*
 963          * If we're restarting already, don't cycle restarts.
 964          * If INIT fw asserted, it will likely fail again.
 965          * If WoWLAN fw asserted, don't restart either, mac80211
 966          * can't recover this since we're already half suspended.
 967          */
 968         if (!mvm->restart_fw && fw_error) {
 969                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert,
 970                                             NULL);
 971         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 972                                     &mvm->status)) {
 973                 struct iwl_mvm_reprobe *reprobe;
 974
 975                 IWL_ERR(mvm,
 976                         "Firmware error during reconfiguration - reprobe!\n");
 977
 978                 /*
 979                  * get a module reference to avoid doing this while unloading
 980                  * anyway and to avoid scheduling a work with code that's
 981                  * being removed.
 982                  */
 983                 if (!try_module_get(THIS_MODULE)) {
 984                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 985                         return;
 986                 }
 987
 988                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 989                 if (!reprobe) {
 990                         module_put(THIS_MODULE);
 991                         return;
 992                 }
 993                 reprobe->dev = mvm->trans->dev;
 994                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 995                 schedule_work(&reprobe->work);
 996         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 997                 /* don't let the transport/FW power down */
 998                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 999
1000                 if (fw_error && mvm->restart_fw > 0)
1001                         mvm->restart_fw--;
1002                 ieee80211_restart_hw(mvm->hw);
1003         }
1004 }
1005
1006 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
1007 {
1008         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1009
1010         iwl_mvm_dump_nic_error_log(mvm);
1011
1012         iwl_mvm_nic_restart(mvm, true);
1013 }
1014
1015 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
1016 {
1017         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1018
1019         WARN_ON(1);
1020         iwl_mvm_nic_restart(mvm, true);
1021 }
1022
1023 struct iwl_d0i3_iter_data {
1024         struct iwl_mvm *mvm;
1025         u8 ap_sta_id;
1026         u8 vif_count;
1027         u8 offloading_tid;
1028         bool disable_offloading;
1029 };
1030
1031 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
1032                                         struct ieee80211_vif *vif,
1033                                         struct iwl_d0i3_iter_data *iter_data)
1034 {
1035         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1036         struct ieee80211_sta *ap_sta;
1037         struct iwl_mvm_sta *mvmsta;
1038         u32 available_tids = 0;
1039         u8 tid;
1040
1041         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
1042                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
1043                 return false;
1044
1045         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
1046         if (IS_ERR_OR_NULL(ap_sta))
1047                 return false;
1048
1049         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
1050         spin_lock_bh(&mvmsta->lock);
1051         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1052                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1053
1054                 /*
1055                  * in case of pending tx packets, don't use this tid
1056                  * for offloading in order to prevent reuse of the same
1057                  * qos seq counters.
1058                  */
1059                 if (iwl_mvm_tid_queued(tid_data))
1060                         continue;
1061
1062                 if (tid_data->state != IWL_AGG_OFF)
1063                         continue;
1064
1065                 available_tids |= BIT(tid);
1066         }
1067         spin_unlock_bh(&mvmsta->lock);
1068
1069         /*
1070          * disallow protocol offloading if we have no available tid
1071          * (with no pending frames and no active aggregation,
1072          * as we don't handle "holes" properly - the scheduler needs the
1073          * frame's seq number and TFD index to match)
1074          */
1075         if (!available_tids)
1076                 return true;
1077
1078         /* for simplicity, just use the first available tid */
1079         iter_data->offloading_tid = ffs(available_tids) - 1;
1080         return false;
1081 }
1082
1083 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1084                                         struct ieee80211_vif *vif)
1085 {
1086         struct iwl_d0i3_iter_data *data = _data;
1087         struct iwl_mvm *mvm = data->mvm;
1088         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1089         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1090
1091         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1092         if (vif->type != NL80211_IFTYPE_STATION ||
1093             !vif->bss_conf.assoc)
1094                 return;
1095
1096         /*
1097          * in case of pending tx packets or active aggregations,
1098          * avoid offloading features in order to prevent reuse of
1099          * the same qos seq counters.
1100          */
1101         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1102                 data->disable_offloading = true;
1103
1104         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1105         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1106
1107         /*
1108          * on init/association, mvm already configures POWER_TABLE_CMD
1109          * and REPLY_MCAST_FILTER_CMD, so currently don't
1110          * reconfigure them (we might want to use different
1111          * params later on, though).
1112          */
1113         data->ap_sta_id = mvmvif->ap_sta_id;
1114         data->vif_count++;
1115 }
1116
1117 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1118                                     struct iwl_wowlan_config_cmd *cmd,
1119                                     struct iwl_d0i3_iter_data *iter_data)
1120 {
1121         struct ieee80211_sta *ap_sta;
1122         struct iwl_mvm_sta *mvm_ap_sta;
1123
1124         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1125                 return;
1126
1127         rcu_read_lock();
1128
1129         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1130         if (IS_ERR_OR_NULL(ap_sta))
1131                 goto out;
1132
1133         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1134         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1135         cmd->offloading_tid = iter_data->offloading_tid;
1136
1137         /*
1138          * The d0i3 uCode takes care of the nonqos counters,
1139          * so configure only the qos seq ones.
1140          */
1141         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1142 out:
1143         rcu_read_unlock();
1144 }
1145
1146 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1147 {
1148         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1149         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1150         int ret;
1151         struct iwl_d0i3_iter_data d0i3_iter_data = {
1152                 .mvm = mvm,
1153         };
1154         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1155                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1156                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1157                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1158                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1159         };
1160         struct iwl_d3_manager_config d3_cfg_cmd = {
1161                 .min_sleep_time = cpu_to_le32(1000),
1162                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1163         };
1164
1165         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1166
1167         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1168
1169         /*
1170          * iwl_mvm_ref_sync takes a reference before checking the flag.
1171          * so by checking there is no held reference we prevent a state
1172          * in which iwl_mvm_ref_sync continues successfully while we
1173          * configure the firmware to enter d0i3
1174          */
1175         if (iwl_mvm_ref_taken(mvm)) {
1176                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1177                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1178                 wake_up(&mvm->d0i3_exit_waitq);
1179                 return 1;
1180         }
1181
1182         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1183                                                    IEEE80211_IFACE_ITER_NORMAL,
1184                                                    iwl_mvm_enter_d0i3_iterator,
1185                                                    &d0i3_iter_data);
1186         if (d0i3_iter_data.vif_count == 1) {
1187                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1188                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1189         } else {
1190                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1191                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1192                 mvm->d0i3_offloading = false;
1193         }
1194
1195         /* make sure we have no running tx while configuring the seqno */
1196         synchronize_net();
1197
1198         /* configure wowlan configuration only if needed */
1199         if (mvm->d0i3_ap_sta_id != IWL_MVM_STATION_COUNT) {
1200                 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd,
1201                                         &d0i3_iter_data);
1202
1203                 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1204                                            sizeof(wowlan_config_cmd),
1205                                            &wowlan_config_cmd);
1206                 if (ret)
1207                         return ret;
1208         }
1209
1210         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1211                                     flags | CMD_MAKE_TRANS_IDLE,
1212                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1213 }
1214
1215 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1216                                        struct ieee80211_vif *vif)
1217 {
1218         struct iwl_mvm *mvm = _data;
1219         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1220
1221         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1222         if (vif->type != NL80211_IFTYPE_STATION ||
1223             !vif->bss_conf.assoc)
1224                 return;
1225
1226         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1227 }
1228
1229 struct iwl_mvm_wakeup_reason_iter_data {
1230         struct iwl_mvm *mvm;
1231         u32 wakeup_reasons;
1232 };
1233
1234 static void iwl_mvm_d0i3_wakeup_reason_iter(void *_data, u8 *mac,
1235                                             struct ieee80211_vif *vif)
1236 {
1237         struct iwl_mvm_wakeup_reason_iter_data *data = _data;
1238         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1239
1240         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1241             data->mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) {
1242                 if (data->wakeup_reasons &
1243                     IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH)
1244                         iwl_mvm_connection_loss(data->mvm, vif, "D0i3");
1245                 else
1246                         ieee80211_beacon_loss(vif);
1247         }
1248 }
1249
1250 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1251 {
1252         struct ieee80211_sta *sta = NULL;
1253         struct iwl_mvm_sta *mvm_ap_sta;
1254         int i;
1255         bool wake_queues = false;
1256
1257         lockdep_assert_held(&mvm->mutex);
1258
1259         spin_lock_bh(&mvm->d0i3_tx_lock);
1260
1261         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1262                 goto out;
1263
1264         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1265
1266         /* get the sta in order to update seq numbers and re-enqueue skbs */
1267         sta = rcu_dereference_protected(
1268                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1269                         lockdep_is_held(&mvm->mutex));
1270
1271         if (IS_ERR_OR_NULL(sta)) {
1272                 sta = NULL;
1273                 goto out;
1274         }
1275
1276         if (mvm->d0i3_offloading && qos_seq) {
1277                 /* update qos seq numbers if offloading was enabled */
1278                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1279                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1280                         u16 seq = le16_to_cpu(qos_seq[i]);
1281                         /* firmware stores last-used one, we store next one */
1282                         seq += 0x10;
1283                         mvm_ap_sta->tid_data[i].seq_number = seq;
1284                 }
1285         }
1286 out:
1287         /* re-enqueue (or drop) all packets */
1288         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1289                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1290
1291                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1292                         ieee80211_free_txskb(mvm->hw, skb);
1293
1294                 /* if the skb_queue is not empty, we need to wake queues */
1295                 wake_queues = true;
1296         }
1297         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1298         wake_up(&mvm->d0i3_exit_waitq);
1299         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1300         if (wake_queues)
1301                 ieee80211_wake_queues(mvm->hw);
1302
1303         spin_unlock_bh(&mvm->d0i3_tx_lock);
1304 }
1305
1306 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1307 {
1308         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1309         struct iwl_host_cmd get_status_cmd = {
1310                 .id = WOWLAN_GET_STATUSES,
1311                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1312         };
1313         struct iwl_wowlan_status *status;
1314         int ret;
1315         u32 handled_reasons, wakeup_reasons = 0;
1316         __le16 *qos_seq = NULL;
1317
1318         mutex_lock(&mvm->mutex);
1319         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1320         if (ret)
1321                 goto out;
1322
1323         if (!get_status_cmd.resp_pkt)
1324                 goto out;
1325
1326         status = (void *)get_status_cmd.resp_pkt->data;
1327         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1328         qos_seq = status->qos_seq_ctr;
1329
1330         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1331
1332         handled_reasons = IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1333                                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1334         if (wakeup_reasons & handled_reasons) {
1335                 struct iwl_mvm_wakeup_reason_iter_data data = {
1336                         .mvm = mvm,
1337                         .wakeup_reasons = wakeup_reasons,
1338                 };
1339
1340                 ieee80211_iterate_active_interfaces(
1341                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1342                         iwl_mvm_d0i3_wakeup_reason_iter, &data);
1343         }
1344 out:
1345         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1346
1347         IWL_DEBUG_INFO(mvm, "d0i3 exit completed (wakeup reasons: 0x%x)\n",
1348                        wakeup_reasons);
1349
1350         /* qos_seq might point inside resp_pkt, so free it only now */
1351         if (get_status_cmd.resp_pkt)
1352                 iwl_free_resp(&get_status_cmd);
1353
1354         /* the FW might have updated the regdomain */
1355         iwl_mvm_update_changed_regdom(mvm);
1356
1357         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1358         mutex_unlock(&mvm->mutex);
1359 }
1360
1361 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1362 {
1363         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1364                     CMD_WAKE_UP_TRANS;
1365         int ret;
1366
1367         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1368
1369         mutex_lock(&mvm->d0i3_suspend_mutex);
1370         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1371                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1372                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1373                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1374                 return 0;
1375         }
1376         mutex_unlock(&mvm->d0i3_suspend_mutex);
1377
1378         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1379         if (ret)
1380                 goto out;
1381
1382         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1383                                                    IEEE80211_IFACE_ITER_NORMAL,
1384                                                    iwl_mvm_exit_d0i3_iterator,
1385                                                    mvm);
1386 out:
1387         schedule_work(&mvm->d0i3_exit_work);
1388         return ret;
1389 }
1390
1391 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1392 {
1393         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1394
1395         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1396         return _iwl_mvm_exit_d0i3(mvm);
1397 }
1398
1399 #define IWL_MVM_COMMON_OPS                                      \
1400         /* these could be differentiated */                     \
1401         .queue_full = iwl_mvm_stop_sw_queue,                    \
1402         .queue_not_full = iwl_mvm_wake_sw_queue,                \
1403         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,              \
1404         .free_skb = iwl_mvm_free_skb,                           \
1405         .nic_error = iwl_mvm_nic_error,                         \
1406         .cmd_queue_full = iwl_mvm_cmd_queue_full,               \
1407         .nic_config = iwl_mvm_nic_config,                       \
1408         .enter_d0i3 = iwl_mvm_enter_d0i3,                       \
1409         .exit_d0i3 = iwl_mvm_exit_d0i3,                         \
1410         /* as we only register one, these MUST be common! */    \
1411         .start = iwl_op_mode_mvm_start,                         \
1412         .stop = iwl_op_mode_mvm_stop
1413
1414 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1415         IWL_MVM_COMMON_OPS,
1416         .rx = iwl_mvm_rx,
1417 };
1418
1419 static void iwl_mvm_rx_mq_rss(struct iwl_op_mode *op_mode,
1420                               struct napi_struct *napi,
1421                               struct iwl_rx_cmd_buffer *rxb,
1422                               unsigned int queue)
1423 {
1424         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1425
1426         iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
1427 }
1428
1429 static const struct iwl_op_mode_ops iwl_mvm_ops_mq = {
1430         IWL_MVM_COMMON_OPS,
1431         .rx = iwl_mvm_rx_mq,
1432         .rx_rss = iwl_mvm_rx_mq_rss,
1433 };