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  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
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  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
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  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/module.h>
  64 #include <linux/vmalloc.h>
  65 #include <net/mac80211.h>
  66
  67 #include "iwl-notif-wait.h"
  68 #include "iwl-trans.h"
  69 #include "iwl-op-mode.h"
  70 #include "iwl-fw.h"
  71 #include "iwl-debug.h"
  72 #include "iwl-drv.h"
  73 #include "iwl-modparams.h"
  74 #include "mvm.h"
  75 #include "iwl-phy-db.h"
  76 #include "iwl-eeprom-parse.h"
  77 #include "iwl-csr.h"
  78 #include "iwl-io.h"
  79 #include "iwl-prph.h"
  80 #include "rs.h"
  81 #include "fw-api-scan.h"
  82 #include "time-event.h"
  83 #include "iwl-fw-error-dump.h"
  84
  85 /*
  86  * module name, copyright, version, etc.
  87  */
  88 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  89
  90 #define DRV_VERSION     IWLWIFI_VERSION
  91
  92 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  93 MODULE_VERSION(DRV_VERSION);
  94 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  95 MODULE_LICENSE("GPL");
  96
  97 static const struct iwl_op_mode_ops iwl_mvm_ops;
  98
  99 struct iwl_mvm_mod_params iwlmvm_mod_params = {
 100         .power_scheme = IWL_POWER_SCHEME_BPS,
 101         /* rest of fields are 0 by default */
 102 };
 103
 104 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 105 MODULE_PARM_DESC(init_dbg,
 106                  "set to true to debug an ASSERT in INIT fw (default: false");
 107 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 108 MODULE_PARM_DESC(power_scheme,
 109                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 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
 148         radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 149                           FW_PHY_CFG_RADIO_TYPE_POS;
 150         radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
 151                           FW_PHY_CFG_RADIO_STEP_POS;
 152         radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
 153                           FW_PHY_CFG_RADIO_DASH_POS;
 154
 155         /* SKU control */
 156         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 157                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 158         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 160
 161         /* radio configuration */
 162         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 163         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 164         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 165
 166         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 167                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 168
 169         /* silicon bits */
 170         reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 171
 172         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 173                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 174                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 175                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 176                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 177                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 178                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 179                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 180                                 reg_val);
 181
 182         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 183                        radio_cfg_step, radio_cfg_dash);
 184
 185         /*
 186          * W/A : NIC is stuck in a reset state after Early PCIe power off
 187          * (PCIe power is lost before PERST# is asserted), causing ME FW
 188          * to lose ownership and not being able to obtain it back.
 189          */
 190         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 191                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 192                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 193                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 194 }
 195
 196 struct iwl_rx_handlers {
 197         u8 cmd_id;
 198         bool async;
 199         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 200                   struct iwl_device_cmd *cmd);
 201 };
 202
 203 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 204         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 205
 206 /*
 207  * Handlers for fw notifications
 208  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 209  * This list should be in order of frequency for performance purposes.
 210  *
 211  * The handler can be SYNC - this means that it will be called in the Rx path
 212  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 213  * only in this case!), it should be set as ASYNC. In that case, it will be
 214  * called from a worker with mvm->mutex held.
 215  */
 216 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 217         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 218         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 219         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 220         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 221
 222         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 223         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 224         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 225         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 226                    iwl_mvm_rx_ant_coupling_notif, true),
 227
 228         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 229
 230         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 231
 232         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 233         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 234         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 235                    iwl_mvm_rx_scan_offload_complete_notif, true),
 236         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
 237                    false),
 238
 239         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 240         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 241
 242         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 243                    false),
 244
 245         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 246         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 247                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 248 };
 249 #undef RX_HANDLER
 250 #define CMD(x) [x] = #x
 251
 252 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 253         CMD(MVM_ALIVE),
 254         CMD(REPLY_ERROR),
 255         CMD(INIT_COMPLETE_NOTIF),
 256         CMD(PHY_CONTEXT_CMD),
 257         CMD(MGMT_MCAST_KEY),
 258         CMD(TX_CMD),
 259         CMD(TXPATH_FLUSH),
 260         CMD(MAC_CONTEXT_CMD),
 261         CMD(TIME_EVENT_CMD),
 262         CMD(TIME_EVENT_NOTIFICATION),
 263         CMD(BINDING_CONTEXT_CMD),
 264         CMD(TIME_QUOTA_CMD),
 265         CMD(NON_QOS_TX_COUNTER_CMD),
 266         CMD(RADIO_VERSION_NOTIFICATION),
 267         CMD(SCAN_REQUEST_CMD),
 268         CMD(SCAN_ABORT_CMD),
 269         CMD(SCAN_START_NOTIFICATION),
 270         CMD(SCAN_RESULTS_NOTIFICATION),
 271         CMD(SCAN_COMPLETE_NOTIFICATION),
 272         CMD(NVM_ACCESS_CMD),
 273         CMD(PHY_CONFIGURATION_CMD),
 274         CMD(CALIB_RES_NOTIF_PHY_DB),
 275         CMD(SET_CALIB_DEFAULT_CMD),
 276         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 277         CMD(ADD_STA_KEY),
 278         CMD(ADD_STA),
 279         CMD(REMOVE_STA),
 280         CMD(LQ_CMD),
 281         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 282         CMD(MATCH_FOUND_NOTIFICATION),
 283         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 284         CMD(SCAN_OFFLOAD_ABORT_CMD),
 285         CMD(SCAN_OFFLOAD_COMPLETE),
 286         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 287         CMD(SCAN_ITERATION_COMPLETE),
 288         CMD(POWER_TABLE_CMD),
 289         CMD(WEP_KEY),
 290         CMD(REPLY_RX_PHY_CMD),
 291         CMD(REPLY_RX_MPDU_CMD),
 292         CMD(BEACON_NOTIFICATION),
 293         CMD(BEACON_TEMPLATE_CMD),
 294         CMD(STATISTICS_NOTIFICATION),
 295         CMD(EOSP_NOTIFICATION),
 296         CMD(REDUCE_TX_POWER_CMD),
 297         CMD(TX_ANT_CONFIGURATION_CMD),
 298         CMD(D3_CONFIG_CMD),
 299         CMD(D0I3_END_CMD),
 300         CMD(PROT_OFFLOAD_CONFIG_CMD),
 301         CMD(OFFLOADS_QUERY_CMD),
 302         CMD(REMOTE_WAKE_CONFIG_CMD),
 303         CMD(WOWLAN_PATTERNS),
 304         CMD(WOWLAN_CONFIGURATION),
 305         CMD(WOWLAN_TSC_RSC_PARAM),
 306         CMD(WOWLAN_TKIP_PARAM),
 307         CMD(WOWLAN_KEK_KCK_MATERIAL),
 308         CMD(WOWLAN_GET_STATUSES),
 309         CMD(WOWLAN_TX_POWER_PER_DB),
 310         CMD(NET_DETECT_CONFIG_CMD),
 311         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 312         CMD(NET_DETECT_PROFILES_CMD),
 313         CMD(NET_DETECT_HOTSPOTS_CMD),
 314         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 315         CMD(CARD_STATE_NOTIFICATION),
 316         CMD(MISSED_BEACONS_NOTIFICATION),
 317         CMD(BT_COEX_PRIO_TABLE),
 318         CMD(BT_COEX_PROT_ENV),
 319         CMD(BT_PROFILE_NOTIFICATION),
 320         CMD(BT_CONFIG),
 321         CMD(MCAST_FILTER_CMD),
 322         CMD(BCAST_FILTER_CMD),
 323         CMD(REPLY_SF_CFG_CMD),
 324         CMD(REPLY_BEACON_FILTERING_CMD),
 325         CMD(REPLY_THERMAL_MNG_BACKOFF),
 326         CMD(MAC_PM_POWER_TABLE),
 327         CMD(BT_COEX_CI),
 328         CMD(BT_COEX_UPDATE_SW_BOOST),
 329         CMD(BT_COEX_UPDATE_CORUN_LUT),
 330         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 331         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 332         CMD(ANTENNA_COUPLING_NOTIFICATION),
 333 };
 334 #undef CMD
 335
 336 /* this forward declaration can avoid to export the function */
 337 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 338 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 339
 340 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 341 {
 342         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 343
 344         if (!pwr_tx_backoff)
 345                 return 0;
 346
 347         while (pwr_tx_backoff->pwr) {
 348                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 349                         return pwr_tx_backoff->backoff;
 350
 351                 pwr_tx_backoff++;
 352         }
 353
 354         return 0;
 355 }
 356
 357 static struct iwl_op_mode *
 358 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 359                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 360 {
 361         struct ieee80211_hw *hw;
 362         struct iwl_op_mode *op_mode;
 363         struct iwl_mvm *mvm;
 364         struct iwl_trans_config trans_cfg = {};
 365         static const u8 no_reclaim_cmds[] = {
 366                 TX_CMD,
 367         };
 368         int err, scan_size;
 369         u32 min_backoff;
 370
 371         /*
 372          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 373          * index all over the driver - check that its value corresponds to the
 374          * array size.
 375          */
 376         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 377
 378         /********************************
 379          * 1. Allocating and configuring HW data
 380          ********************************/
 381         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 382                                 sizeof(struct iwl_mvm),
 383                                 &iwl_mvm_hw_ops);
 384         if (!hw)
 385                 return NULL;
 386
 387         op_mode = hw->priv;
 388         op_mode->ops = &iwl_mvm_ops;
 389
 390         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 391         mvm->dev = trans->dev;
 392         mvm->trans = trans;
 393         mvm->cfg = cfg;
 394         mvm->fw = fw;
 395         mvm->hw = hw;
 396
 397         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 398
 399         mvm->aux_queue = 15;
 400         mvm->first_agg_queue = 16;
 401         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 402         if (mvm->cfg->base_params->num_of_queues == 16) {
 403                 mvm->aux_queue = 11;
 404                 mvm->first_agg_queue = 12;
 405         }
 406         mvm->sf_state = SF_UNINIT;
 407
 408         mutex_init(&mvm->mutex);
 409         mutex_init(&mvm->d0i3_suspend_mutex);
 410         spin_lock_init(&mvm->async_handlers_lock);
 411         INIT_LIST_HEAD(&mvm->time_event_list);
 412         INIT_LIST_HEAD(&mvm->async_handlers_list);
 413         spin_lock_init(&mvm->time_event_lock);
 414
 415         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 416         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 417         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 418         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 419
 420         spin_lock_init(&mvm->d0i3_tx_lock);
 421         skb_queue_head_init(&mvm->d0i3_tx);
 422         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 423
 424         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 425
 426         /*
 427          * Populate the state variables that the transport layer needs
 428          * to know about.
 429          */
 430         trans_cfg.op_mode = op_mode;
 431         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 432         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 433         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 434
 435         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 436                 trans_cfg.bc_table_dword = true;
 437
 438         if (!iwlwifi_mod_params.wd_disable)
 439                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 440         else
 441                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 442
 443         trans_cfg.command_names = iwl_mvm_cmd_strings;
 444
 445         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 446         trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;
 447
 448         snprintf(mvm->hw->wiphy->fw_version,
 449                  sizeof(mvm->hw->wiphy->fw_version),
 450                  "%s", fw->fw_version);
 451
 452         /* Configure transport layer */
 453         iwl_trans_configure(mvm->trans, &trans_cfg);
 454
 455         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 456         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 457
 458         /* set up notification wait support */
 459         iwl_notification_wait_init(&mvm->notif_wait);
 460
 461         /* Init phy db */
 462         mvm->phy_db = iwl_phy_db_init(trans);
 463         if (!mvm->phy_db) {
 464                 IWL_ERR(mvm, "Cannot init phy_db\n");
 465                 goto out_free;
 466         }
 467
 468         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 469                  mvm->cfg->name, mvm->trans->hw_rev);
 470
 471         min_backoff = calc_min_backoff(trans, cfg);
 472         iwl_mvm_tt_initialize(mvm, min_backoff);
 473         /* set the nvm_file_name according to priority */
 474         if (iwlwifi_mod_params.nvm_file)
 475                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 476         else
 477                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 478
 479         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 480                  "not allowing power-up and not having nvm_file\n"))
 481                 goto out_free;
 482
 483         /*
 484          * Even if nvm exists in the nvm_file driver should read agin the nvm
 485          * from the nic because there might be entries that exist in the OTP
 486          * and not in the file.
 487          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 488          */
 489         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 490                 err = iwl_nvm_init(mvm, false);
 491                 if (err)
 492                         goto out_free;
 493         } else {
 494                 err = iwl_trans_start_hw(mvm->trans);
 495                 if (err)
 496                         goto out_free;
 497
 498                 mutex_lock(&mvm->mutex);
 499                 err = iwl_run_init_mvm_ucode(mvm, true);
 500                 iwl_trans_stop_device(trans);
 501                 mutex_unlock(&mvm->mutex);
 502                 /* returns 0 if successful, 1 if success but in rfkill */
 503                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 504                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 505                         goto out_free;
 506                 }
 507         }
 508
 509         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 510                 scan_size = sizeof(struct iwl_scan_req_unified_lmac) +
 511                         sizeof(struct iwl_scan_channel_cfg_lmac) *
 512                                 mvm->fw->ucode_capa.n_scan_channels +
 513                         sizeof(struct iwl_scan_probe_req);
 514         else
 515                 scan_size = sizeof(struct iwl_scan_cmd) +
 516                         mvm->fw->ucode_capa.max_probe_length +
 517                         mvm->fw->ucode_capa.n_scan_channels *
 518                                 sizeof(struct iwl_scan_channel);
 519
 520         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 521         if (!mvm->scan_cmd)
 522                 goto out_free;
 523
 524         err = iwl_mvm_mac_setup_register(mvm);
 525         if (err)
 526                 goto out_free;
 527
 528         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 529         if (err)
 530                 goto out_unregister;
 531
 532         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 533
 534         /* rpm starts with a taken ref. only set the appropriate bit here. */
 535         set_bit(IWL_MVM_REF_UCODE_DOWN, mvm->ref_bitmap);
 536
 537         return op_mode;
 538
 539  out_unregister:
 540         ieee80211_unregister_hw(mvm->hw);
 541         iwl_mvm_leds_exit(mvm);
 542  out_free:
 543         iwl_phy_db_free(mvm->phy_db);
 544         kfree(mvm->scan_cmd);
 545         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 546                 iwl_trans_op_mode_leave(trans);
 547         ieee80211_free_hw(mvm->hw);
 548         return NULL;
 549 }
 550
 551 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 552 {
 553         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 554         int i;
 555
 556         iwl_mvm_leds_exit(mvm);
 557
 558         iwl_mvm_tt_exit(mvm);
 559
 560         ieee80211_unregister_hw(mvm->hw);
 561
 562         kfree(mvm->scan_cmd);
 563         vfree(mvm->fw_error_dump);
 564         kfree(mvm->mcast_filter_cmd);
 565         mvm->mcast_filter_cmd = NULL;
 566
 567 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 568         kfree(mvm->d3_resume_sram);
 569 #endif
 570
 571         iwl_trans_op_mode_leave(mvm->trans);
 572
 573         iwl_phy_db_free(mvm->phy_db);
 574         mvm->phy_db = NULL;
 575
 576         iwl_free_nvm_data(mvm->nvm_data);
 577         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 578                 kfree(mvm->nvm_sections[i].data);
 579
 580         ieee80211_free_hw(mvm->hw);
 581 }
 582
 583 struct iwl_async_handler_entry {
 584         struct list_head list;
 585         struct iwl_rx_cmd_buffer rxb;
 586         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 587                   struct iwl_device_cmd *cmd);
 588 };
 589
 590 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 591 {
 592         struct iwl_async_handler_entry *entry, *tmp;
 593
 594         spin_lock_bh(&mvm->async_handlers_lock);
 595         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 596                 iwl_free_rxb(&entry->rxb);
 597                 list_del(&entry->list);
 598                 kfree(entry);
 599         }
 600         spin_unlock_bh(&mvm->async_handlers_lock);
 601 }
 602
 603 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 604 {
 605         struct iwl_mvm *mvm =
 606                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 607         struct iwl_async_handler_entry *entry, *tmp;
 608         struct list_head local_list;
 609
 610         INIT_LIST_HEAD(&local_list);
 611
 612         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 613         mutex_lock(&mvm->mutex);
 614
 615         /*
 616          * Sync with Rx path with a lock. Remove all the entries from this list,
 617          * add them to a local one (lock free), and then handle them.
 618          */
 619         spin_lock_bh(&mvm->async_handlers_lock);
 620         list_splice_init(&mvm->async_handlers_list, &local_list);
 621         spin_unlock_bh(&mvm->async_handlers_lock);
 622
 623         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 624                 if (entry->fn(mvm, &entry->rxb, NULL))
 625                         IWL_WARN(mvm,
 626                                  "returned value from ASYNC handlers are ignored\n");
 627                 iwl_free_rxb(&entry->rxb);
 628                 list_del(&entry->list);
 629                 kfree(entry);
 630         }
 631         mutex_unlock(&mvm->mutex);
 632 }
 633
 634 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 635                                struct iwl_rx_cmd_buffer *rxb,
 636                                struct iwl_device_cmd *cmd)
 637 {
 638         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 639         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 640         u8 i;
 641
 642         /*
 643          * Do the notification wait before RX handlers so
 644          * even if the RX handler consumes the RXB we have
 645          * access to it in the notification wait entry.
 646          */
 647         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 648
 649         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 650                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 651                 struct iwl_async_handler_entry *entry;
 652
 653                 if (rx_h->cmd_id != pkt->hdr.cmd)
 654                         continue;
 655
 656                 if (!rx_h->async)
 657                         return rx_h->fn(mvm, rxb, cmd);
 658
 659                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 660                 /* we can't do much... */
 661                 if (!entry)
 662                         return 0;
 663
 664                 entry->rxb._page = rxb_steal_page(rxb);
 665                 entry->rxb._offset = rxb->_offset;
 666                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 667                 entry->fn = rx_h->fn;
 668                 spin_lock(&mvm->async_handlers_lock);
 669                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 670                 spin_unlock(&mvm->async_handlers_lock);
 671                 schedule_work(&mvm->async_handlers_wk);
 672                 break;
 673         }
 674
 675         return 0;
 676 }
 677
 678 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 679 {
 680         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 681         int mq = mvm->queue_to_mac80211[queue];
 682
 683         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 684                 return;
 685
 686         if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
 687                 IWL_DEBUG_TX_QUEUES(mvm,
 688                                     "queue %d (mac80211 %d) already stopped\n",
 689                                     queue, mq);
 690                 return;
 691         }
 692
 693         set_bit(mq, &mvm->transport_queue_stop);
 694         ieee80211_stop_queue(mvm->hw, mq);
 695 }
 696
 697 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 698 {
 699         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 700         int mq = mvm->queue_to_mac80211[queue];
 701
 702         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 703                 return;
 704
 705         if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
 706                 IWL_DEBUG_TX_QUEUES(mvm,
 707                                     "queue %d (mac80211 %d) already awake\n",
 708                                     queue, mq);
 709                 return;
 710         }
 711
 712         clear_bit(mq, &mvm->transport_queue_stop);
 713
 714         ieee80211_wake_queue(mvm->hw, mq);
 715 }
 716
 717 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 718 {
 719         if (state)
 720                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 721         else
 722                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 723
 724         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 725 }
 726
 727 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 728 {
 729         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 730
 731         if (state)
 732                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 733         else
 734                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 735
 736         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 737
 738         return state && mvm->cur_ucode != IWL_UCODE_INIT;
 739 }
 740
 741 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 742 {
 743         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 744         struct ieee80211_tx_info *info;
 745
 746         info = IEEE80211_SKB_CB(skb);
 747         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 748         ieee80211_free_txskb(mvm->hw, skb);
 749 }
 750
 751 struct iwl_mvm_reprobe {
 752         struct device *dev;
 753         struct work_struct work;
 754 };
 755
 756 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 757 {
 758         struct iwl_mvm_reprobe *reprobe;
 759
 760         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 761         if (device_reprobe(reprobe->dev))
 762                 dev_err(reprobe->dev, "reprobe failed!\n");
 763         kfree(reprobe);
 764         module_put(THIS_MODULE);
 765 }
 766
 767 static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
 768 {
 769         iwl_abort_notification_waits(&mvm->notif_wait);
 770
 771         /*
 772          * This is a bit racy, but worst case we tell mac80211 about
 773          * a stopped/aborted scan when that was already done which
 774          * is not a problem. It is necessary to abort any os scan
 775          * here because mac80211 requires having the scan cleared
 776          * before restarting.
 777          * We'll reset the scan_status to NONE in restart cleanup in
 778          * the next start() call from mac80211. If restart isn't called
 779          * (no fw restart) scan status will stay busy.
 780          */
 781         switch (mvm->scan_status) {
 782         case IWL_MVM_SCAN_NONE:
 783                 break;
 784         case IWL_MVM_SCAN_OS:
 785                 ieee80211_scan_completed(mvm->hw, true);
 786                 break;
 787         case IWL_MVM_SCAN_SCHED:
 788                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 789                 if (!mvm->restart_fw)
 790                         ieee80211_sched_scan_stopped(mvm->hw);
 791                 break;
 792         }
 793
 794         /*
 795          * If we're restarting already, don't cycle restarts.
 796          * If INIT fw asserted, it will likely fail again.
 797          * If WoWLAN fw asserted, don't restart either, mac80211
 798          * can't recover this since we're already half suspended.
 799          */
 800         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 801                 struct iwl_mvm_reprobe *reprobe;
 802
 803                 IWL_ERR(mvm,
 804                         "Firmware error during reconfiguration - reprobe!\n");
 805
 806                 /*
 807                  * get a module reference to avoid doing this while unloading
 808                  * anyway and to avoid scheduling a work with code that's
 809                  * being removed.
 810                  */
 811                 if (!try_module_get(THIS_MODULE)) {
 812                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 813                         return;
 814                 }
 815
 816                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 817                 if (!reprobe) {
 818                         module_put(THIS_MODULE);
 819                         return;
 820                 }
 821                 reprobe->dev = mvm->trans->dev;
 822                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 823                 schedule_work(&reprobe->work);
 824         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR && mvm->restart_fw) {
 825                 /* don't let the transport/FW power down */
 826                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 827
 828                 if (mvm->restart_fw > 0)
 829                         mvm->restart_fw--;
 830                 ieee80211_restart_hw(mvm->hw);
 831         }
 832 }
 833
 834 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 835 {
 836         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 837
 838         iwl_mvm_dump_nic_error_log(mvm);
 839
 840         iwl_mvm_nic_restart(mvm);
 841 }
 842
 843 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 844 {
 845         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 846
 847         WARN_ON(1);
 848         iwl_mvm_nic_restart(mvm);
 849 }
 850
 851 struct iwl_d0i3_iter_data {
 852         struct iwl_mvm *mvm;
 853         u8 ap_sta_id;
 854         u8 vif_count;
 855         u8 offloading_tid;
 856         bool disable_offloading;
 857 };
 858
 859 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 860                                         struct ieee80211_vif *vif,
 861                                         struct iwl_d0i3_iter_data *iter_data)
 862 {
 863         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 864         struct ieee80211_sta *ap_sta;
 865         struct iwl_mvm_sta *mvmsta;
 866         u32 available_tids = 0;
 867         u8 tid;
 868
 869         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 870                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 871                 return false;
 872
 873         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 874         if (IS_ERR_OR_NULL(ap_sta))
 875                 return false;
 876
 877         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 878         spin_lock_bh(&mvmsta->lock);
 879         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 880                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 881
 882                 /*
 883                  * in case of pending tx packets, don't use this tid
 884                  * for offloading in order to prevent reuse of the same
 885                  * qos seq counters.
 886                  */
 887                 if (iwl_mvm_tid_queued(tid_data))
 888                         continue;
 889
 890                 if (tid_data->state != IWL_AGG_OFF)
 891                         continue;
 892
 893                 available_tids |= BIT(tid);
 894         }
 895         spin_unlock_bh(&mvmsta->lock);
 896
 897         /*
 898          * disallow protocol offloading if we have no available tid
 899          * (with no pending frames and no active aggregation,
 900          * as we don't handle "holes" properly - the scheduler needs the
 901          * frame's seq number and TFD index to match)
 902          */
 903         if (!available_tids)
 904                 return true;
 905
 906         /* for simplicity, just use the first available tid */
 907         iter_data->offloading_tid = ffs(available_tids) - 1;
 908         return false;
 909 }
 910
 911 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 912                                         struct ieee80211_vif *vif)
 913 {
 914         struct iwl_d0i3_iter_data *data = _data;
 915         struct iwl_mvm *mvm = data->mvm;
 916         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 917         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 918
 919         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 920         if (vif->type != NL80211_IFTYPE_STATION ||
 921             !vif->bss_conf.assoc)
 922                 return;
 923
 924         /*
 925          * in case of pending tx packets or active aggregations,
 926          * avoid offloading features in order to prevent reuse of
 927          * the same qos seq counters.
 928          */
 929         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 930                 data->disable_offloading = true;
 931
 932         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 933         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 934
 935         /*
 936          * on init/association, mvm already configures POWER_TABLE_CMD
 937          * and REPLY_MCAST_FILTER_CMD, so currently don't
 938          * reconfigure them (we might want to use different
 939          * params later on, though).
 940          */
 941         data->ap_sta_id = mvmvif->ap_sta_id;
 942         data->vif_count++;
 943 }
 944
 945 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
 946                                     struct iwl_wowlan_config_cmd_v3 *cmd,
 947                                     struct iwl_d0i3_iter_data *iter_data)
 948 {
 949         struct ieee80211_sta *ap_sta;
 950         struct iwl_mvm_sta *mvm_ap_sta;
 951
 952         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
 953                 return;
 954
 955         rcu_read_lock();
 956
 957         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
 958         if (IS_ERR_OR_NULL(ap_sta))
 959                 goto out;
 960
 961         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 962         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
 963         cmd->offloading_tid = iter_data->offloading_tid;
 964
 965         /*
 966          * The d0i3 uCode takes care of the nonqos counters,
 967          * so configure only the qos seq ones.
 968          */
 969         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
 970 out:
 971         rcu_read_unlock();
 972 }
 973 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
 974 {
 975         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 976         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 977         int ret;
 978         struct iwl_d0i3_iter_data d0i3_iter_data = {
 979                 .mvm = mvm,
 980         };
 981         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
 982                 .common = {
 983                         .wakeup_filter =
 984                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
 985                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
 986                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
 987                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
 988                 },
 989         };
 990         struct iwl_d3_manager_config d3_cfg_cmd = {
 991                 .min_sleep_time = cpu_to_le32(1000),
 992         };
 993
 994         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
 995
 996         /* make sure we have no running tx while configuring the qos */
 997         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 998         synchronize_net();
 999
1000         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1001                                                    IEEE80211_IFACE_ITER_NORMAL,
1002                                                    iwl_mvm_enter_d0i3_iterator,
1003                                                    &d0i3_iter_data);
1004         if (d0i3_iter_data.vif_count == 1) {
1005                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1006                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1007         } else {
1008                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1009                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1010                 mvm->d0i3_offloading = false;
1011         }
1012
1013         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1014         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1015                                    sizeof(wowlan_config_cmd),
1016                                    &wowlan_config_cmd);
1017         if (ret)
1018                 return ret;
1019
1020         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1021                                     flags | CMD_MAKE_TRANS_IDLE,
1022                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1023 }
1024
1025 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1026                                        struct ieee80211_vif *vif)
1027 {
1028         struct iwl_mvm *mvm = _data;
1029         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1030
1031         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1032         if (vif->type != NL80211_IFTYPE_STATION ||
1033             !vif->bss_conf.assoc)
1034                 return;
1035
1036         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1037 }
1038
1039 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1040                                          struct ieee80211_vif *vif)
1041 {
1042         struct iwl_mvm *mvm = data;
1043         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1044
1045         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1046             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1047                 ieee80211_connection_loss(vif);
1048 }
1049
1050 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1051 {
1052         struct ieee80211_sta *sta = NULL;
1053         struct iwl_mvm_sta *mvm_ap_sta;
1054         int i;
1055         bool wake_queues = false;
1056
1057         lockdep_assert_held(&mvm->mutex);
1058
1059         spin_lock_bh(&mvm->d0i3_tx_lock);
1060
1061         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1062                 goto out;
1063
1064         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1065
1066         /* get the sta in order to update seq numbers and re-enqueue skbs */
1067         sta = rcu_dereference_protected(
1068                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1069                         lockdep_is_held(&mvm->mutex));
1070
1071         if (IS_ERR_OR_NULL(sta)) {
1072                 sta = NULL;
1073                 goto out;
1074         }
1075
1076         if (mvm->d0i3_offloading && qos_seq) {
1077                 /* update qos seq numbers if offloading was enabled */
1078                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1079                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1080                         u16 seq = le16_to_cpu(qos_seq[i]);
1081                         /* firmware stores last-used one, we store next one */
1082                         seq += 0x10;
1083                         mvm_ap_sta->tid_data[i].seq_number = seq;
1084                 }
1085         }
1086 out:
1087         /* re-enqueue (or drop) all packets */
1088         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1089                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1090
1091                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1092                         ieee80211_free_txskb(mvm->hw, skb);
1093
1094                 /* if the skb_queue is not empty, we need to wake queues */
1095                 wake_queues = true;
1096         }
1097         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1098         wake_up(&mvm->d0i3_exit_waitq);
1099         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1100         if (wake_queues)
1101                 ieee80211_wake_queues(mvm->hw);
1102
1103         spin_unlock_bh(&mvm->d0i3_tx_lock);
1104 }
1105
1106 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1107 {
1108         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1109         struct iwl_host_cmd get_status_cmd = {
1110                 .id = WOWLAN_GET_STATUSES,
1111                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1112         };
1113         struct iwl_wowlan_status *status;
1114         int ret;
1115         u32 disconnection_reasons, wakeup_reasons;
1116         __le16 *qos_seq = NULL;
1117
1118         mutex_lock(&mvm->mutex);
1119         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1120         if (ret)
1121                 goto out;
1122
1123         if (!get_status_cmd.resp_pkt)
1124                 goto out;
1125
1126         status = (void *)get_status_cmd.resp_pkt->data;
1127         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1128         qos_seq = status->qos_seq_ctr;
1129
1130         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1131
1132         disconnection_reasons =
1133                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1134                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1135         if (wakeup_reasons & disconnection_reasons)
1136                 ieee80211_iterate_active_interfaces(
1137                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1138                         iwl_mvm_d0i3_disconnect_iter, mvm);
1139
1140         iwl_free_resp(&get_status_cmd);
1141 out:
1142         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1143         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1144         mutex_unlock(&mvm->mutex);
1145 }
1146
1147 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1148 {
1149         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1150                     CMD_WAKE_UP_TRANS;
1151         int ret;
1152
1153         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1154
1155         mutex_lock(&mvm->d0i3_suspend_mutex);
1156         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1157                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1158                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1159                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1160                 return 0;
1161         }
1162         mutex_unlock(&mvm->d0i3_suspend_mutex);
1163
1164         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1165         if (ret)
1166                 goto out;
1167
1168         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1169                                                    IEEE80211_IFACE_ITER_NORMAL,
1170                                                    iwl_mvm_exit_d0i3_iterator,
1171                                                    mvm);
1172 out:
1173         schedule_work(&mvm->d0i3_exit_work);
1174         return ret;
1175 }
1176
1177 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1178 {
1179         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1180
1181         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1182         return _iwl_mvm_exit_d0i3(mvm);
1183 }
1184
1185 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1186                              struct napi_struct *napi,
1187                              struct net_device *napi_dev,
1188                              int (*poll)(struct napi_struct *, int),
1189                              int weight)
1190 {
1191         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1192
1193         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1194 }
1195
1196 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1197         .start = iwl_op_mode_mvm_start,
1198         .stop = iwl_op_mode_mvm_stop,
1199         .rx = iwl_mvm_rx_dispatch,
1200         .queue_full = iwl_mvm_stop_sw_queue,
1201         .queue_not_full = iwl_mvm_wake_sw_queue,
1202         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1203         .free_skb = iwl_mvm_free_skb,
1204         .nic_error = iwl_mvm_nic_error,
1205         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1206         .nic_config = iwl_mvm_nic_config,
1207         .enter_d0i3 = iwl_mvm_enter_d0i3,
1208         .exit_d0i3 = iwl_mvm_exit_d0i3,
1209         .napi_add = iwl_mvm_napi_add,
1210 };