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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
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  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/module.h>
  66 #include <linux/vmalloc.h>
  67 #include <net/mac80211.h>
  68
  69 #include "iwl-notif-wait.h"
  70 #include "iwl-trans.h"
  71 #include "iwl-op-mode.h"
  72 #include "iwl-fw.h"
  73 #include "iwl-debug.h"
  74 #include "iwl-drv.h"
  75 #include "iwl-modparams.h"
  76 #include "mvm.h"
  77 #include "iwl-phy-db.h"
  78 #include "iwl-eeprom-parse.h"
  79 #include "iwl-csr.h"
  80 #include "iwl-io.h"
  81 #include "iwl-prph.h"
  82 #include "rs.h"
  83 #include "fw-api-scan.h"
  84 #include "time-event.h"
  85 #include "iwl-fw-error-dump.h"
  86
  87 /*
  88  * module name, copyright, version, etc.
  89  */
  90 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  91
  92 #define DRV_VERSION     IWLWIFI_VERSION
  93
  94 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  95 MODULE_VERSION(DRV_VERSION);
  96 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  97 MODULE_LICENSE("GPL");
  98
  99 static const struct iwl_op_mode_ops iwl_mvm_ops;
 100
 101 struct iwl_mvm_mod_params iwlmvm_mod_params = {
 102         .power_scheme = IWL_POWER_SCHEME_BPS,
 103         /* rest of fields are 0 by default */
 104 };
 105
 106 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 107 MODULE_PARM_DESC(init_dbg,
 108                  "set to true to debug an ASSERT in INIT fw (default: false");
 109 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 110 MODULE_PARM_DESC(power_scheme,
 111                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 112
 113 /*
 114  * module init and exit functions
 115  */
 116 static int __init iwl_mvm_init(void)
 117 {
 118         int ret;
 119
 120         ret = iwl_mvm_rate_control_register();
 121         if (ret) {
 122                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 123                 return ret;
 124         }
 125
 126         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 127
 128         if (ret) {
 129                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 130                 iwl_mvm_rate_control_unregister();
 131         }
 132
 133         return ret;
 134 }
 135 module_init(iwl_mvm_init);
 136
 137 static void __exit iwl_mvm_exit(void)
 138 {
 139         iwl_opmode_deregister("iwlmvm");
 140         iwl_mvm_rate_control_unregister();
 141 }
 142 module_exit(iwl_mvm_exit);
 143
 144 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 145 {
 146         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 147         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 148         u32 reg_val = 0;
 149
 150         radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 151                           FW_PHY_CFG_RADIO_TYPE_POS;
 152         radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
 153                           FW_PHY_CFG_RADIO_STEP_POS;
 154         radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
 155                           FW_PHY_CFG_RADIO_DASH_POS;
 156
 157         /* SKU control */
 158         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 160         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 161                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 162
 163         /* radio configuration */
 164         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 165         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 166         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 167
 168         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 169                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 170
 171         /*
 172          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 173          * shouldn't be set to any non-zero value. The same is supposed to be
 174          * true of the other HW, but unsetting them (such as the 7260) causes
 175          * automatic tests to fail on seemingly unrelated errors. Need to
 176          * further investigate this, but for now we'll separate cases.
 177          */
 178         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 179                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 180
 181         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 182                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 185                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 186                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 187                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 188                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 189                                 reg_val);
 190
 191         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 192                        radio_cfg_step, radio_cfg_dash);
 193
 194         /*
 195          * W/A : NIC is stuck in a reset state after Early PCIe power off
 196          * (PCIe power is lost before PERST# is asserted), causing ME FW
 197          * to lose ownership and not being able to obtain it back.
 198          */
 199         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 200                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 201                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 202                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 203 }
 204
 205 struct iwl_rx_handlers {
 206         u8 cmd_id;
 207         bool async;
 208         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 209                   struct iwl_device_cmd *cmd);
 210 };
 211
 212 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 213         { .cmd_id = _cmd_id , .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(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 227         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 228         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 229         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 230
 231         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 232         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 233         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 234         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 235                    iwl_mvm_rx_ant_coupling_notif, true),
 236
 237         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 238
 239         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 240
 241         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 242         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 243         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 244                    iwl_mvm_rx_scan_offload_complete_notif, true),
 245         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
 246                    false),
 247         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 248                    true),
 249
 250         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 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
 261         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 262                    true),
 263         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 264
 265 };
 266 #undef RX_HANDLER
 267 #define CMD(x) [x] = #x
 268
 269 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 270         CMD(MVM_ALIVE),
 271         CMD(REPLY_ERROR),
 272         CMD(INIT_COMPLETE_NOTIF),
 273         CMD(PHY_CONTEXT_CMD),
 274         CMD(MGMT_MCAST_KEY),
 275         CMD(TX_CMD),
 276         CMD(TXPATH_FLUSH),
 277         CMD(MAC_CONTEXT_CMD),
 278         CMD(TIME_EVENT_CMD),
 279         CMD(TIME_EVENT_NOTIFICATION),
 280         CMD(BINDING_CONTEXT_CMD),
 281         CMD(TIME_QUOTA_CMD),
 282         CMD(NON_QOS_TX_COUNTER_CMD),
 283         CMD(RADIO_VERSION_NOTIFICATION),
 284         CMD(SCAN_REQUEST_CMD),
 285         CMD(SCAN_ABORT_CMD),
 286         CMD(SCAN_START_NOTIFICATION),
 287         CMD(SCAN_RESULTS_NOTIFICATION),
 288         CMD(SCAN_COMPLETE_NOTIFICATION),
 289         CMD(NVM_ACCESS_CMD),
 290         CMD(PHY_CONFIGURATION_CMD),
 291         CMD(CALIB_RES_NOTIF_PHY_DB),
 292         CMD(SET_CALIB_DEFAULT_CMD),
 293         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 294         CMD(ADD_STA_KEY),
 295         CMD(ADD_STA),
 296         CMD(REMOVE_STA),
 297         CMD(LQ_CMD),
 298         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 299         CMD(MATCH_FOUND_NOTIFICATION),
 300         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 301         CMD(SCAN_OFFLOAD_ABORT_CMD),
 302         CMD(HOT_SPOT_CMD),
 303         CMD(SCAN_OFFLOAD_COMPLETE),
 304         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 305         CMD(SCAN_ITERATION_COMPLETE),
 306         CMD(POWER_TABLE_CMD),
 307         CMD(WEP_KEY),
 308         CMD(REPLY_RX_PHY_CMD),
 309         CMD(REPLY_RX_MPDU_CMD),
 310         CMD(BEACON_NOTIFICATION),
 311         CMD(BEACON_TEMPLATE_CMD),
 312         CMD(STATISTICS_NOTIFICATION),
 313         CMD(EOSP_NOTIFICATION),
 314         CMD(REDUCE_TX_POWER_CMD),
 315         CMD(TX_ANT_CONFIGURATION_CMD),
 316         CMD(D3_CONFIG_CMD),
 317         CMD(D0I3_END_CMD),
 318         CMD(PROT_OFFLOAD_CONFIG_CMD),
 319         CMD(OFFLOADS_QUERY_CMD),
 320         CMD(REMOTE_WAKE_CONFIG_CMD),
 321         CMD(WOWLAN_PATTERNS),
 322         CMD(WOWLAN_CONFIGURATION),
 323         CMD(WOWLAN_TSC_RSC_PARAM),
 324         CMD(WOWLAN_TKIP_PARAM),
 325         CMD(WOWLAN_KEK_KCK_MATERIAL),
 326         CMD(WOWLAN_GET_STATUSES),
 327         CMD(WOWLAN_TX_POWER_PER_DB),
 328         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 329         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 330         CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
 331         CMD(CARD_STATE_NOTIFICATION),
 332         CMD(MISSED_BEACONS_NOTIFICATION),
 333         CMD(BT_COEX_PRIO_TABLE),
 334         CMD(BT_COEX_PROT_ENV),
 335         CMD(BT_PROFILE_NOTIFICATION),
 336         CMD(BT_CONFIG),
 337         CMD(MCAST_FILTER_CMD),
 338         CMD(BCAST_FILTER_CMD),
 339         CMD(REPLY_SF_CFG_CMD),
 340         CMD(REPLY_BEACON_FILTERING_CMD),
 341         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 342         CMD(DTS_MEASUREMENT_NOTIFICATION),
 343         CMD(REPLY_THERMAL_MNG_BACKOFF),
 344         CMD(MAC_PM_POWER_TABLE),
 345         CMD(LTR_CONFIG),
 346         CMD(BT_COEX_CI),
 347         CMD(BT_COEX_UPDATE_SW_BOOST),
 348         CMD(BT_COEX_UPDATE_CORUN_LUT),
 349         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 350         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 351         CMD(ANTENNA_COUPLING_NOTIFICATION),
 352         CMD(SCD_QUEUE_CFG),
 353         CMD(SCAN_CFG_CMD),
 354         CMD(SCAN_REQ_UMAC),
 355         CMD(SCAN_ABORT_UMAC),
 356         CMD(SCAN_COMPLETE_UMAC),
 357         CMD(TDLS_CHANNEL_SWITCH_CMD),
 358         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 359         CMD(TDLS_CONFIG_CMD),
 360 };
 361 #undef CMD
 362
 363 /* this forward declaration can avoid to export the function */
 364 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 365 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 366
 367 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 368 {
 369         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 370
 371         if (!pwr_tx_backoff)
 372                 return 0;
 373
 374         while (pwr_tx_backoff->pwr) {
 375                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 376                         return pwr_tx_backoff->backoff;
 377
 378                 pwr_tx_backoff++;
 379         }
 380
 381         return 0;
 382 }
 383
 384 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 385
 386 static struct iwl_op_mode *
 387 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 388                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 389 {
 390         struct ieee80211_hw *hw;
 391         struct iwl_op_mode *op_mode;
 392         struct iwl_mvm *mvm;
 393         struct iwl_trans_config trans_cfg = {};
 394         static const u8 no_reclaim_cmds[] = {
 395                 TX_CMD,
 396         };
 397         int err, scan_size;
 398         u32 min_backoff;
 399
 400         /*
 401          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 402          * index all over the driver - check that its value corresponds to the
 403          * array size.
 404          */
 405         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 406
 407         /********************************
 408          * 1. Allocating and configuring HW data
 409          ********************************/
 410         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 411                                 sizeof(struct iwl_mvm),
 412                                 &iwl_mvm_hw_ops);
 413         if (!hw)
 414                 return NULL;
 415
 416         if (cfg->max_rx_agg_size)
 417                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 418
 419         if (cfg->max_tx_agg_size)
 420                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 421
 422         op_mode = hw->priv;
 423         op_mode->ops = &iwl_mvm_ops;
 424
 425         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 426         mvm->dev = trans->dev;
 427         mvm->trans = trans;
 428         mvm->cfg = cfg;
 429         mvm->fw = fw;
 430         mvm->hw = hw;
 431
 432         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 433
 434         mvm->aux_queue = 15;
 435         mvm->first_agg_queue = 16;
 436         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 437         if (mvm->cfg->base_params->num_of_queues == 16) {
 438                 mvm->aux_queue = 11;
 439                 mvm->first_agg_queue = 12;
 440         }
 441         mvm->sf_state = SF_UNINIT;
 442         mvm->low_latency_agg_frame_limit = 6;
 443         mvm->cur_ucode = IWL_UCODE_INIT;
 444
 445         mutex_init(&mvm->mutex);
 446         mutex_init(&mvm->d0i3_suspend_mutex);
 447         spin_lock_init(&mvm->async_handlers_lock);
 448         INIT_LIST_HEAD(&mvm->time_event_list);
 449         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 450         INIT_LIST_HEAD(&mvm->async_handlers_list);
 451         spin_lock_init(&mvm->time_event_lock);
 452
 453         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 454         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 455         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 456         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 457         INIT_WORK(&mvm->fw_error_dump_wk, iwl_mvm_fw_error_dump_wk);
 458         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
 459
 460         spin_lock_init(&mvm->d0i3_tx_lock);
 461         spin_lock_init(&mvm->refs_lock);
 462         skb_queue_head_init(&mvm->d0i3_tx);
 463         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 464
 465         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 466
 467         /*
 468          * Populate the state variables that the transport layer needs
 469          * to know about.
 470          */
 471         trans_cfg.op_mode = op_mode;
 472         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 473         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 474         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 475
 476         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 477                 trans_cfg.bc_table_dword = true;
 478
 479         if (!iwlwifi_mod_params.wd_disable)
 480                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 481         else
 482                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 483
 484         trans_cfg.command_names = iwl_mvm_cmd_strings;
 485
 486         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 487         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 488         trans_cfg.scd_set_active = true;
 489
 490         snprintf(mvm->hw->wiphy->fw_version,
 491                  sizeof(mvm->hw->wiphy->fw_version),
 492                  "%s", fw->fw_version);
 493
 494         /* Configure transport layer */
 495         iwl_trans_configure(mvm->trans, &trans_cfg);
 496
 497         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 498         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 499         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 500         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 501         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 502                sizeof(trans->dbg_conf_tlv));
 503
 504         /* set up notification wait support */
 505         iwl_notification_wait_init(&mvm->notif_wait);
 506
 507         /* Init phy db */
 508         mvm->phy_db = iwl_phy_db_init(trans);
 509         if (!mvm->phy_db) {
 510                 IWL_ERR(mvm, "Cannot init phy_db\n");
 511                 goto out_free;
 512         }
 513
 514         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 515                  mvm->cfg->name, mvm->trans->hw_rev);
 516
 517         min_backoff = calc_min_backoff(trans, cfg);
 518         iwl_mvm_tt_initialize(mvm, min_backoff);
 519         /* set the nvm_file_name according to priority */
 520         if (iwlwifi_mod_params.nvm_file)
 521                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 522         else
 523                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 524
 525         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 526                  "not allowing power-up and not having nvm_file\n"))
 527                 goto out_free;
 528
 529         /*
 530          * Even if nvm exists in the nvm_file driver should read again the nvm
 531          * from the nic because there might be entries that exist in the OTP
 532          * and not in the file.
 533          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 534          */
 535         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 536                 err = iwl_nvm_init(mvm, false);
 537                 if (err)
 538                         goto out_free;
 539         } else {
 540                 err = iwl_trans_start_hw(mvm->trans);
 541                 if (err)
 542                         goto out_free;
 543
 544                 mutex_lock(&mvm->mutex);
 545                 err = iwl_run_init_mvm_ucode(mvm, true);
 546                 if (!err || !iwlmvm_mod_params.init_dbg)
 547                         iwl_trans_stop_device(trans);
 548                 mutex_unlock(&mvm->mutex);
 549                 /* returns 0 if successful, 1 if success but in rfkill */
 550                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 551                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 552                         goto out_free;
 553                 }
 554         }
 555
 556         scan_size = iwl_mvm_scan_size(mvm);
 557
 558         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 559         if (!mvm->scan_cmd)
 560                 goto out_free;
 561
 562         err = iwl_mvm_mac_setup_register(mvm);
 563         if (err)
 564                 goto out_free;
 565
 566         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 567         if (err)
 568                 goto out_unregister;
 569
 570         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 571
 572         /* rpm starts with a taken ref. only set the appropriate bit here. */
 573         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 574
 575         return op_mode;
 576
 577  out_unregister:
 578         ieee80211_unregister_hw(mvm->hw);
 579         iwl_mvm_leds_exit(mvm);
 580  out_free:
 581         iwl_phy_db_free(mvm->phy_db);
 582         kfree(mvm->scan_cmd);
 583         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 584                 iwl_trans_op_mode_leave(trans);
 585         ieee80211_free_hw(mvm->hw);
 586         return NULL;
 587 }
 588
 589 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 590 {
 591         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 592         int i;
 593
 594         iwl_mvm_leds_exit(mvm);
 595
 596         iwl_mvm_tt_exit(mvm);
 597
 598         ieee80211_unregister_hw(mvm->hw);
 599
 600         kfree(mvm->scan_cmd);
 601         kfree(mvm->mcast_filter_cmd);
 602         mvm->mcast_filter_cmd = NULL;
 603
 604 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 605         kfree(mvm->d3_resume_sram);
 606         if (mvm->nd_config) {
 607                 kfree(mvm->nd_config->match_sets);
 608                 kfree(mvm->nd_config);
 609                 mvm->nd_config = NULL;
 610         }
 611 #endif
 612
 613         iwl_trans_op_mode_leave(mvm->trans);
 614
 615         iwl_phy_db_free(mvm->phy_db);
 616         mvm->phy_db = NULL;
 617
 618         iwl_free_nvm_data(mvm->nvm_data);
 619         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 620                 kfree(mvm->nvm_sections[i].data);
 621
 622         ieee80211_free_hw(mvm->hw);
 623 }
 624
 625 struct iwl_async_handler_entry {
 626         struct list_head list;
 627         struct iwl_rx_cmd_buffer rxb;
 628         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 629                   struct iwl_device_cmd *cmd);
 630 };
 631
 632 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 633 {
 634         struct iwl_async_handler_entry *entry, *tmp;
 635
 636         spin_lock_bh(&mvm->async_handlers_lock);
 637         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 638                 iwl_free_rxb(&entry->rxb);
 639                 list_del(&entry->list);
 640                 kfree(entry);
 641         }
 642         spin_unlock_bh(&mvm->async_handlers_lock);
 643 }
 644
 645 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 646 {
 647         struct iwl_mvm *mvm =
 648                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 649         struct iwl_async_handler_entry *entry, *tmp;
 650         struct list_head local_list;
 651
 652         INIT_LIST_HEAD(&local_list);
 653
 654         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 655         mutex_lock(&mvm->mutex);
 656
 657         /*
 658          * Sync with Rx path with a lock. Remove all the entries from this list,
 659          * add them to a local one (lock free), and then handle them.
 660          */
 661         spin_lock_bh(&mvm->async_handlers_lock);
 662         list_splice_init(&mvm->async_handlers_list, &local_list);
 663         spin_unlock_bh(&mvm->async_handlers_lock);
 664
 665         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 666                 if (entry->fn(mvm, &entry->rxb, NULL))
 667                         IWL_WARN(mvm,
 668                                  "returned value from ASYNC handlers are ignored\n");
 669                 iwl_free_rxb(&entry->rxb);
 670                 list_del(&entry->list);
 671                 kfree(entry);
 672         }
 673         mutex_unlock(&mvm->mutex);
 674 }
 675
 676 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 677                                struct iwl_rx_cmd_buffer *rxb,
 678                                struct iwl_device_cmd *cmd)
 679 {
 680         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 681         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 682         u8 i;
 683
 684         /*
 685          * Do the notification wait before RX handlers so
 686          * even if the RX handler consumes the RXB we have
 687          * access to it in the notification wait entry.
 688          */
 689         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 690
 691         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 692                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 693                 struct iwl_async_handler_entry *entry;
 694
 695                 if (rx_h->cmd_id != pkt->hdr.cmd)
 696                         continue;
 697
 698                 if (!rx_h->async)
 699                         return rx_h->fn(mvm, rxb, cmd);
 700
 701                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 702                 /* we can't do much... */
 703                 if (!entry)
 704                         return 0;
 705
 706                 entry->rxb._page = rxb_steal_page(rxb);
 707                 entry->rxb._offset = rxb->_offset;
 708                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 709                 entry->fn = rx_h->fn;
 710                 spin_lock(&mvm->async_handlers_lock);
 711                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 712                 spin_unlock(&mvm->async_handlers_lock);
 713                 schedule_work(&mvm->async_handlers_wk);
 714                 break;
 715         }
 716
 717         return 0;
 718 }
 719
 720 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 721 {
 722         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 723         int mq = mvm->queue_to_mac80211[queue];
 724
 725         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 726                 return;
 727
 728         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 729                 IWL_DEBUG_TX_QUEUES(mvm,
 730                                     "queue %d (mac80211 %d) already stopped\n",
 731                                     queue, mq);
 732                 return;
 733         }
 734
 735         ieee80211_stop_queue(mvm->hw, mq);
 736 }
 737
 738 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 739 {
 740         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 741         int mq = mvm->queue_to_mac80211[queue];
 742
 743         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 744                 return;
 745
 746         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 747                 IWL_DEBUG_TX_QUEUES(mvm,
 748                                     "queue %d (mac80211 %d) still stopped\n",
 749                                     queue, mq);
 750                 return;
 751         }
 752
 753         ieee80211_wake_queue(mvm->hw, mq);
 754 }
 755
 756 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 757 {
 758         if (state)
 759                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 760         else
 761                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 762
 763         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 764 }
 765
 766 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 767 {
 768         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 769         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 770
 771         if (state)
 772                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 773         else
 774                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 775
 776         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 777
 778         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 779         if (calibrating)
 780                 iwl_abort_notification_waits(&mvm->notif_wait);
 781
 782         /*
 783          * Stop the device if we run OPERATIONAL firmware or if we are in the
 784          * middle of the calibrations.
 785          */
 786         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 787 }
 788
 789 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 790 {
 791         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 792         struct ieee80211_tx_info *info;
 793
 794         info = IEEE80211_SKB_CB(skb);
 795         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 796         ieee80211_free_txskb(mvm->hw, skb);
 797 }
 798
 799 struct iwl_mvm_reprobe {
 800         struct device *dev;
 801         struct work_struct work;
 802 };
 803
 804 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 805 {
 806         struct iwl_mvm_reprobe *reprobe;
 807
 808         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 809         if (device_reprobe(reprobe->dev))
 810                 dev_err(reprobe->dev, "reprobe failed!\n");
 811         kfree(reprobe);
 812         module_put(THIS_MODULE);
 813 }
 814
 815 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 816 {
 817         struct iwl_mvm *mvm =
 818                 container_of(work, struct iwl_mvm, fw_error_dump_wk);
 819
 820         mutex_lock(&mvm->mutex);
 821         iwl_mvm_fw_error_dump(mvm);
 822         mutex_unlock(&mvm->mutex);
 823 }
 824
 825 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 826 {
 827         iwl_abort_notification_waits(&mvm->notif_wait);
 828
 829         /*
 830          * This is a bit racy, but worst case we tell mac80211 about
 831          * a stopped/aborted scan when that was already done which
 832          * is not a problem. It is necessary to abort any os scan
 833          * here because mac80211 requires having the scan cleared
 834          * before restarting.
 835          * We'll reset the scan_status to NONE in restart cleanup in
 836          * the next start() call from mac80211. If restart isn't called
 837          * (no fw restart) scan status will stay busy.
 838          */
 839         switch (mvm->scan_status) {
 840         case IWL_MVM_SCAN_NONE:
 841                 break;
 842         case IWL_MVM_SCAN_OS:
 843                 ieee80211_scan_completed(mvm->hw, true);
 844                 break;
 845         case IWL_MVM_SCAN_SCHED:
 846                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 847                 if (!mvm->restart_fw)
 848                         ieee80211_sched_scan_stopped(mvm->hw);
 849                 break;
 850         }
 851
 852         /*
 853          * If we're restarting already, don't cycle restarts.
 854          * If INIT fw asserted, it will likely fail again.
 855          * If WoWLAN fw asserted, don't restart either, mac80211
 856          * can't recover this since we're already half suspended.
 857          */
 858         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 859                 struct iwl_mvm_reprobe *reprobe;
 860
 861                 IWL_ERR(mvm,
 862                         "Firmware error during reconfiguration - reprobe!\n");
 863
 864                 /*
 865                  * get a module reference to avoid doing this while unloading
 866                  * anyway and to avoid scheduling a work with code that's
 867                  * being removed.
 868                  */
 869                 if (!try_module_get(THIS_MODULE)) {
 870                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 871                         return;
 872                 }
 873
 874                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 875                 if (!reprobe) {
 876                         module_put(THIS_MODULE);
 877                         return;
 878                 }
 879                 reprobe->dev = mvm->trans->dev;
 880                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 881                 schedule_work(&reprobe->work);
 882         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
 883                    (!fw_error || mvm->restart_fw)) {
 884                 /* don't let the transport/FW power down */
 885                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 886
 887                 if (fw_error && mvm->restart_fw > 0)
 888                         mvm->restart_fw--;
 889                 ieee80211_restart_hw(mvm->hw);
 890         } else if (fw_error) {
 891                 schedule_work(&mvm->fw_error_dump_wk);
 892         }
 893 }
 894
 895 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 896 {
 897         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 898
 899         iwl_mvm_dump_nic_error_log(mvm);
 900
 901         iwl_mvm_nic_restart(mvm, true);
 902 }
 903
 904 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 905 {
 906         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 907
 908         WARN_ON(1);
 909         iwl_mvm_nic_restart(mvm, true);
 910 }
 911
 912 struct iwl_d0i3_iter_data {
 913         struct iwl_mvm *mvm;
 914         u8 ap_sta_id;
 915         u8 vif_count;
 916         u8 offloading_tid;
 917         bool disable_offloading;
 918 };
 919
 920 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 921                                         struct ieee80211_vif *vif,
 922                                         struct iwl_d0i3_iter_data *iter_data)
 923 {
 924         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 925         struct ieee80211_sta *ap_sta;
 926         struct iwl_mvm_sta *mvmsta;
 927         u32 available_tids = 0;
 928         u8 tid;
 929
 930         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 931                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 932                 return false;
 933
 934         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 935         if (IS_ERR_OR_NULL(ap_sta))
 936                 return false;
 937
 938         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 939         spin_lock_bh(&mvmsta->lock);
 940         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 941                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 942
 943                 /*
 944                  * in case of pending tx packets, don't use this tid
 945                  * for offloading in order to prevent reuse of the same
 946                  * qos seq counters.
 947                  */
 948                 if (iwl_mvm_tid_queued(tid_data))
 949                         continue;
 950
 951                 if (tid_data->state != IWL_AGG_OFF)
 952                         continue;
 953
 954                 available_tids |= BIT(tid);
 955         }
 956         spin_unlock_bh(&mvmsta->lock);
 957
 958         /*
 959          * disallow protocol offloading if we have no available tid
 960          * (with no pending frames and no active aggregation,
 961          * as we don't handle "holes" properly - the scheduler needs the
 962          * frame's seq number and TFD index to match)
 963          */
 964         if (!available_tids)
 965                 return true;
 966
 967         /* for simplicity, just use the first available tid */
 968         iter_data->offloading_tid = ffs(available_tids) - 1;
 969         return false;
 970 }
 971
 972 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 973                                         struct ieee80211_vif *vif)
 974 {
 975         struct iwl_d0i3_iter_data *data = _data;
 976         struct iwl_mvm *mvm = data->mvm;
 977         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 978         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 979
 980         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 981         if (vif->type != NL80211_IFTYPE_STATION ||
 982             !vif->bss_conf.assoc)
 983                 return;
 984
 985         /*
 986          * in case of pending tx packets or active aggregations,
 987          * avoid offloading features in order to prevent reuse of
 988          * the same qos seq counters.
 989          */
 990         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 991                 data->disable_offloading = true;
 992
 993         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 994         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 995
 996         /*
 997          * on init/association, mvm already configures POWER_TABLE_CMD
 998          * and REPLY_MCAST_FILTER_CMD, so currently don't
 999          * reconfigure them (we might want to use different
1000          * params later on, though).
1001          */
1002         data->ap_sta_id = mvmvif->ap_sta_id;
1003         data->vif_count++;
1004 }
1005
1006 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1007                                     struct iwl_wowlan_config_cmd *cmd,
1008                                     struct iwl_d0i3_iter_data *iter_data)
1009 {
1010         struct ieee80211_sta *ap_sta;
1011         struct iwl_mvm_sta *mvm_ap_sta;
1012
1013         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1014                 return;
1015
1016         rcu_read_lock();
1017
1018         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1019         if (IS_ERR_OR_NULL(ap_sta))
1020                 goto out;
1021
1022         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1023         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1024         cmd->offloading_tid = iter_data->offloading_tid;
1025
1026         /*
1027          * The d0i3 uCode takes care of the nonqos counters,
1028          * so configure only the qos seq ones.
1029          */
1030         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1031 out:
1032         rcu_read_unlock();
1033 }
1034 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1035 {
1036         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1037         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1038         int ret;
1039         struct iwl_d0i3_iter_data d0i3_iter_data = {
1040                 .mvm = mvm,
1041         };
1042         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1043                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1044                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1045                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1046                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1047         };
1048         struct iwl_d3_manager_config d3_cfg_cmd = {
1049                 .min_sleep_time = cpu_to_le32(1000),
1050         };
1051
1052         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1053
1054         /* make sure we have no running tx while configuring the qos */
1055         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1056         synchronize_net();
1057
1058         /*
1059          * iwl_mvm_ref_sync takes a reference before checking the flag.
1060          * so by checking there is no held reference we prevent a state
1061          * in which iwl_mvm_ref_sync continues successfully while we
1062          * configure the firmware to enter d0i3
1063          */
1064         if (iwl_mvm_ref_taken(mvm)) {
1065                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1066                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1067                 wake_up(&mvm->d0i3_exit_waitq);
1068                 return 1;
1069         }
1070
1071         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1072                                                    IEEE80211_IFACE_ITER_NORMAL,
1073                                                    iwl_mvm_enter_d0i3_iterator,
1074                                                    &d0i3_iter_data);
1075         if (d0i3_iter_data.vif_count == 1) {
1076                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1077                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1078         } else {
1079                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1080                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1081                 mvm->d0i3_offloading = false;
1082         }
1083
1084         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1085         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1086                                    sizeof(wowlan_config_cmd),
1087                                    &wowlan_config_cmd);
1088         if (ret)
1089                 return ret;
1090
1091         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1092                                     flags | CMD_MAKE_TRANS_IDLE,
1093                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1094 }
1095
1096 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1097                                        struct ieee80211_vif *vif)
1098 {
1099         struct iwl_mvm *mvm = _data;
1100         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1101
1102         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1103         if (vif->type != NL80211_IFTYPE_STATION ||
1104             !vif->bss_conf.assoc)
1105                 return;
1106
1107         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1108 }
1109
1110 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1111                                          struct ieee80211_vif *vif)
1112 {
1113         struct iwl_mvm *mvm = data;
1114         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1115
1116         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1117             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1118                 ieee80211_connection_loss(vif);
1119 }
1120
1121 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1122 {
1123         struct ieee80211_sta *sta = NULL;
1124         struct iwl_mvm_sta *mvm_ap_sta;
1125         int i;
1126         bool wake_queues = false;
1127
1128         lockdep_assert_held(&mvm->mutex);
1129
1130         spin_lock_bh(&mvm->d0i3_tx_lock);
1131
1132         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1133                 goto out;
1134
1135         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1136
1137         /* get the sta in order to update seq numbers and re-enqueue skbs */
1138         sta = rcu_dereference_protected(
1139                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1140                         lockdep_is_held(&mvm->mutex));
1141
1142         if (IS_ERR_OR_NULL(sta)) {
1143                 sta = NULL;
1144                 goto out;
1145         }
1146
1147         if (mvm->d0i3_offloading && qos_seq) {
1148                 /* update qos seq numbers if offloading was enabled */
1149                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1150                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1151                         u16 seq = le16_to_cpu(qos_seq[i]);
1152                         /* firmware stores last-used one, we store next one */
1153                         seq += 0x10;
1154                         mvm_ap_sta->tid_data[i].seq_number = seq;
1155                 }
1156         }
1157 out:
1158         /* re-enqueue (or drop) all packets */
1159         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1160                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1161
1162                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1163                         ieee80211_free_txskb(mvm->hw, skb);
1164
1165                 /* if the skb_queue is not empty, we need to wake queues */
1166                 wake_queues = true;
1167         }
1168         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1169         wake_up(&mvm->d0i3_exit_waitq);
1170         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1171         if (wake_queues)
1172                 ieee80211_wake_queues(mvm->hw);
1173
1174         spin_unlock_bh(&mvm->d0i3_tx_lock);
1175 }
1176
1177 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1178 {
1179         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1180         struct iwl_host_cmd get_status_cmd = {
1181                 .id = WOWLAN_GET_STATUSES,
1182                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1183         };
1184         struct iwl_wowlan_status *status;
1185         int ret;
1186         u32 disconnection_reasons, wakeup_reasons;
1187         __le16 *qos_seq = NULL;
1188
1189         mutex_lock(&mvm->mutex);
1190         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1191         if (ret)
1192                 goto out;
1193
1194         if (!get_status_cmd.resp_pkt)
1195                 goto out;
1196
1197         status = (void *)get_status_cmd.resp_pkt->data;
1198         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1199         qos_seq = status->qos_seq_ctr;
1200
1201         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1202
1203         disconnection_reasons =
1204                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1205                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1206         if (wakeup_reasons & disconnection_reasons)
1207                 ieee80211_iterate_active_interfaces(
1208                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1209                         iwl_mvm_d0i3_disconnect_iter, mvm);
1210
1211         iwl_free_resp(&get_status_cmd);
1212 out:
1213         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1214         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1215         mutex_unlock(&mvm->mutex);
1216 }
1217
1218 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1219 {
1220         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1221                     CMD_WAKE_UP_TRANS;
1222         int ret;
1223
1224         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1225
1226         mutex_lock(&mvm->d0i3_suspend_mutex);
1227         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1228                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1229                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1230                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1231                 return 0;
1232         }
1233         mutex_unlock(&mvm->d0i3_suspend_mutex);
1234
1235         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1236         if (ret)
1237                 goto out;
1238
1239         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1240                                                    IEEE80211_IFACE_ITER_NORMAL,
1241                                                    iwl_mvm_exit_d0i3_iterator,
1242                                                    mvm);
1243 out:
1244         schedule_work(&mvm->d0i3_exit_work);
1245         return ret;
1246 }
1247
1248 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1249 {
1250         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1251
1252         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1253         return _iwl_mvm_exit_d0i3(mvm);
1254 }
1255
1256 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1257                              struct napi_struct *napi,
1258                              struct net_device *napi_dev,
1259                              int (*poll)(struct napi_struct *, int),
1260                              int weight)
1261 {
1262         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1263
1264         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1265 }
1266
1267 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1268         .start = iwl_op_mode_mvm_start,
1269         .stop = iwl_op_mode_mvm_stop,
1270         .rx = iwl_mvm_rx_dispatch,
1271         .queue_full = iwl_mvm_stop_sw_queue,
1272         .queue_not_full = iwl_mvm_wake_sw_queue,
1273         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1274         .free_skb = iwl_mvm_free_skb,
1275         .nic_error = iwl_mvm_nic_error,
1276         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1277         .nic_config = iwl_mvm_nic_config,
1278         .enter_d0i3 = iwl_mvm_enter_d0i3,
1279         .exit_d0i3 = iwl_mvm_exit_d0i3,
1280         .napi_add = iwl_mvm_napi_add,
1281 };