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  *
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  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
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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
 248         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 249         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 250
 251         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 252                    false),
 253
 254         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 255         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 256                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 257 };
 258 #undef RX_HANDLER
 259 #define CMD(x) [x] = #x
 260
 261 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 262         CMD(MVM_ALIVE),
 263         CMD(REPLY_ERROR),
 264         CMD(INIT_COMPLETE_NOTIF),
 265         CMD(PHY_CONTEXT_CMD),
 266         CMD(MGMT_MCAST_KEY),
 267         CMD(TX_CMD),
 268         CMD(TXPATH_FLUSH),
 269         CMD(MAC_CONTEXT_CMD),
 270         CMD(TIME_EVENT_CMD),
 271         CMD(TIME_EVENT_NOTIFICATION),
 272         CMD(BINDING_CONTEXT_CMD),
 273         CMD(TIME_QUOTA_CMD),
 274         CMD(NON_QOS_TX_COUNTER_CMD),
 275         CMD(RADIO_VERSION_NOTIFICATION),
 276         CMD(SCAN_REQUEST_CMD),
 277         CMD(SCAN_ABORT_CMD),
 278         CMD(SCAN_START_NOTIFICATION),
 279         CMD(SCAN_RESULTS_NOTIFICATION),
 280         CMD(SCAN_COMPLETE_NOTIFICATION),
 281         CMD(NVM_ACCESS_CMD),
 282         CMD(PHY_CONFIGURATION_CMD),
 283         CMD(CALIB_RES_NOTIF_PHY_DB),
 284         CMD(SET_CALIB_DEFAULT_CMD),
 285         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 286         CMD(ADD_STA_KEY),
 287         CMD(ADD_STA),
 288         CMD(REMOVE_STA),
 289         CMD(LQ_CMD),
 290         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 291         CMD(MATCH_FOUND_NOTIFICATION),
 292         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 293         CMD(SCAN_OFFLOAD_ABORT_CMD),
 294         CMD(HOT_SPOT_CMD),
 295         CMD(SCAN_OFFLOAD_COMPLETE),
 296         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 297         CMD(SCAN_ITERATION_COMPLETE),
 298         CMD(POWER_TABLE_CMD),
 299         CMD(WEP_KEY),
 300         CMD(REPLY_RX_PHY_CMD),
 301         CMD(REPLY_RX_MPDU_CMD),
 302         CMD(BEACON_NOTIFICATION),
 303         CMD(BEACON_TEMPLATE_CMD),
 304         CMD(STATISTICS_NOTIFICATION),
 305         CMD(EOSP_NOTIFICATION),
 306         CMD(REDUCE_TX_POWER_CMD),
 307         CMD(TX_ANT_CONFIGURATION_CMD),
 308         CMD(D3_CONFIG_CMD),
 309         CMD(D0I3_END_CMD),
 310         CMD(PROT_OFFLOAD_CONFIG_CMD),
 311         CMD(OFFLOADS_QUERY_CMD),
 312         CMD(REMOTE_WAKE_CONFIG_CMD),
 313         CMD(WOWLAN_PATTERNS),
 314         CMD(WOWLAN_CONFIGURATION),
 315         CMD(WOWLAN_TSC_RSC_PARAM),
 316         CMD(WOWLAN_TKIP_PARAM),
 317         CMD(WOWLAN_KEK_KCK_MATERIAL),
 318         CMD(WOWLAN_GET_STATUSES),
 319         CMD(WOWLAN_TX_POWER_PER_DB),
 320         CMD(NET_DETECT_CONFIG_CMD),
 321         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 322         CMD(NET_DETECT_PROFILES_CMD),
 323         CMD(NET_DETECT_HOTSPOTS_CMD),
 324         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 325         CMD(CARD_STATE_NOTIFICATION),
 326         CMD(MISSED_BEACONS_NOTIFICATION),
 327         CMD(BT_COEX_PRIO_TABLE),
 328         CMD(BT_COEX_PROT_ENV),
 329         CMD(BT_PROFILE_NOTIFICATION),
 330         CMD(BT_CONFIG),
 331         CMD(MCAST_FILTER_CMD),
 332         CMD(BCAST_FILTER_CMD),
 333         CMD(REPLY_SF_CFG_CMD),
 334         CMD(REPLY_BEACON_FILTERING_CMD),
 335         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 336         CMD(DTS_MEASUREMENT_NOTIFICATION),
 337         CMD(REPLY_THERMAL_MNG_BACKOFF),
 338         CMD(MAC_PM_POWER_TABLE),
 339         CMD(LTR_CONFIG),
 340         CMD(BT_COEX_CI),
 341         CMD(BT_COEX_UPDATE_SW_BOOST),
 342         CMD(BT_COEX_UPDATE_CORUN_LUT),
 343         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 344         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 345         CMD(ANTENNA_COUPLING_NOTIFICATION),
 346         CMD(SCD_QUEUE_CFG),
 347 };
 348 #undef CMD
 349
 350 /* this forward declaration can avoid to export the function */
 351 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 352 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 353
 354 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 355 {
 356         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 357
 358         if (!pwr_tx_backoff)
 359                 return 0;
 360
 361         while (pwr_tx_backoff->pwr) {
 362                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 363                         return pwr_tx_backoff->backoff;
 364
 365                 pwr_tx_backoff++;
 366         }
 367
 368         return 0;
 369 }
 370
 371 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 372
 373 static struct iwl_op_mode *
 374 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 375                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 376 {
 377         struct ieee80211_hw *hw;
 378         struct iwl_op_mode *op_mode;
 379         struct iwl_mvm *mvm;
 380         struct iwl_trans_config trans_cfg = {};
 381         static const u8 no_reclaim_cmds[] = {
 382                 TX_CMD,
 383         };
 384         int err, scan_size;
 385         u32 min_backoff;
 386
 387         /*
 388          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 389          * index all over the driver - check that its value corresponds to the
 390          * array size.
 391          */
 392         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 393
 394         /********************************
 395          * 1. Allocating and configuring HW data
 396          ********************************/
 397         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 398                                 sizeof(struct iwl_mvm),
 399                                 &iwl_mvm_hw_ops);
 400         if (!hw)
 401                 return NULL;
 402
 403         if (cfg->max_rx_agg_size)
 404                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 405
 406         op_mode = hw->priv;
 407         op_mode->ops = &iwl_mvm_ops;
 408
 409         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 410         mvm->dev = trans->dev;
 411         mvm->trans = trans;
 412         mvm->cfg = cfg;
 413         mvm->fw = fw;
 414         mvm->hw = hw;
 415
 416         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 417
 418         mvm->aux_queue = 15;
 419         mvm->first_agg_queue = 16;
 420         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 421         if (mvm->cfg->base_params->num_of_queues == 16) {
 422                 mvm->aux_queue = 11;
 423                 mvm->first_agg_queue = 12;
 424         }
 425         mvm->sf_state = SF_UNINIT;
 426         mvm->low_latency_agg_frame_limit = 6;
 427         mvm->cur_ucode = IWL_UCODE_INIT;
 428
 429         mutex_init(&mvm->mutex);
 430         mutex_init(&mvm->d0i3_suspend_mutex);
 431         spin_lock_init(&mvm->async_handlers_lock);
 432         INIT_LIST_HEAD(&mvm->time_event_list);
 433         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 434         INIT_LIST_HEAD(&mvm->async_handlers_list);
 435         spin_lock_init(&mvm->time_event_lock);
 436
 437         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 438         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 439         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 440         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 441         INIT_WORK(&mvm->fw_error_dump_wk, iwl_mvm_fw_error_dump_wk);
 442
 443         spin_lock_init(&mvm->d0i3_tx_lock);
 444         spin_lock_init(&mvm->refs_lock);
 445         skb_queue_head_init(&mvm->d0i3_tx);
 446         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 447
 448         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 449
 450         /*
 451          * Populate the state variables that the transport layer needs
 452          * to know about.
 453          */
 454         trans_cfg.op_mode = op_mode;
 455         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 456         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 457         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 458
 459         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 460                 trans_cfg.bc_table_dword = true;
 461
 462         if (!iwlwifi_mod_params.wd_disable)
 463                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 464         else
 465                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 466
 467         trans_cfg.command_names = iwl_mvm_cmd_strings;
 468
 469         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 470         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 471         trans_cfg.scd_set_active = true;
 472
 473         snprintf(mvm->hw->wiphy->fw_version,
 474                  sizeof(mvm->hw->wiphy->fw_version),
 475                  "%s", fw->fw_version);
 476
 477         /* Configure transport layer */
 478         iwl_trans_configure(mvm->trans, &trans_cfg);
 479
 480         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 481         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 482
 483         /* set up notification wait support */
 484         iwl_notification_wait_init(&mvm->notif_wait);
 485
 486         /* Init phy db */
 487         mvm->phy_db = iwl_phy_db_init(trans);
 488         if (!mvm->phy_db) {
 489                 IWL_ERR(mvm, "Cannot init phy_db\n");
 490                 goto out_free;
 491         }
 492
 493         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 494                  mvm->cfg->name, mvm->trans->hw_rev);
 495
 496         min_backoff = calc_min_backoff(trans, cfg);
 497         iwl_mvm_tt_initialize(mvm, min_backoff);
 498         /* set the nvm_file_name according to priority */
 499         if (iwlwifi_mod_params.nvm_file)
 500                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 501         else
 502                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 503
 504         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 505                  "not allowing power-up and not having nvm_file\n"))
 506                 goto out_free;
 507
 508         /*
 509          * Even if nvm exists in the nvm_file driver should read again the nvm
 510          * from the nic because there might be entries that exist in the OTP
 511          * and not in the file.
 512          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 513          */
 514         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 515                 err = iwl_nvm_init(mvm, false);
 516                 if (err)
 517                         goto out_free;
 518         } else {
 519                 err = iwl_trans_start_hw(mvm->trans);
 520                 if (err)
 521                         goto out_free;
 522
 523                 mutex_lock(&mvm->mutex);
 524                 err = iwl_run_init_mvm_ucode(mvm, true);
 525                 iwl_trans_stop_device(trans);
 526                 mutex_unlock(&mvm->mutex);
 527                 /* returns 0 if successful, 1 if success but in rfkill */
 528                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 529                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 530                         goto out_free;
 531                 }
 532         }
 533
 534         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 535                 scan_size = sizeof(struct iwl_scan_req_unified_lmac) +
 536                         sizeof(struct iwl_scan_channel_cfg_lmac) *
 537                                 mvm->fw->ucode_capa.n_scan_channels +
 538                         sizeof(struct iwl_scan_probe_req);
 539         else
 540                 scan_size = sizeof(struct iwl_scan_cmd) +
 541                         mvm->fw->ucode_capa.max_probe_length +
 542                         mvm->fw->ucode_capa.n_scan_channels *
 543                                 sizeof(struct iwl_scan_channel);
 544
 545         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 546         if (!mvm->scan_cmd)
 547                 goto out_free;
 548
 549         err = iwl_mvm_mac_setup_register(mvm);
 550         if (err)
 551                 goto out_free;
 552
 553         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 554         if (err)
 555                 goto out_unregister;
 556
 557         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 558
 559         /* rpm starts with a taken ref. only set the appropriate bit here. */
 560         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 561
 562         return op_mode;
 563
 564  out_unregister:
 565         ieee80211_unregister_hw(mvm->hw);
 566         iwl_mvm_leds_exit(mvm);
 567  out_free:
 568         iwl_phy_db_free(mvm->phy_db);
 569         kfree(mvm->scan_cmd);
 570         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 571                 iwl_trans_op_mode_leave(trans);
 572         ieee80211_free_hw(mvm->hw);
 573         return NULL;
 574 }
 575
 576 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 577 {
 578         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 579         int i;
 580
 581         iwl_mvm_leds_exit(mvm);
 582
 583         iwl_mvm_tt_exit(mvm);
 584
 585         ieee80211_unregister_hw(mvm->hw);
 586
 587         kfree(mvm->scan_cmd);
 588         if (mvm->fw_error_dump) {
 589                 vfree(mvm->fw_error_dump->op_mode_ptr);
 590                 vfree(mvm->fw_error_dump->trans_ptr);
 591                 kfree(mvm->fw_error_dump);
 592         }
 593         kfree(mvm->mcast_filter_cmd);
 594         mvm->mcast_filter_cmd = NULL;
 595
 596 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 597         kfree(mvm->d3_resume_sram);
 598 #endif
 599
 600         iwl_trans_op_mode_leave(mvm->trans);
 601
 602         iwl_phy_db_free(mvm->phy_db);
 603         mvm->phy_db = NULL;
 604
 605         iwl_free_nvm_data(mvm->nvm_data);
 606         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 607                 kfree(mvm->nvm_sections[i].data);
 608
 609         ieee80211_free_hw(mvm->hw);
 610 }
 611
 612 struct iwl_async_handler_entry {
 613         struct list_head list;
 614         struct iwl_rx_cmd_buffer rxb;
 615         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 616                   struct iwl_device_cmd *cmd);
 617 };
 618
 619 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 620 {
 621         struct iwl_async_handler_entry *entry, *tmp;
 622
 623         spin_lock_bh(&mvm->async_handlers_lock);
 624         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 625                 iwl_free_rxb(&entry->rxb);
 626                 list_del(&entry->list);
 627                 kfree(entry);
 628         }
 629         spin_unlock_bh(&mvm->async_handlers_lock);
 630 }
 631
 632 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 633 {
 634         struct iwl_mvm *mvm =
 635                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 636         struct iwl_async_handler_entry *entry, *tmp;
 637         struct list_head local_list;
 638
 639         INIT_LIST_HEAD(&local_list);
 640
 641         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 642         mutex_lock(&mvm->mutex);
 643
 644         /*
 645          * Sync with Rx path with a lock. Remove all the entries from this list,
 646          * add them to a local one (lock free), and then handle them.
 647          */
 648         spin_lock_bh(&mvm->async_handlers_lock);
 649         list_splice_init(&mvm->async_handlers_list, &local_list);
 650         spin_unlock_bh(&mvm->async_handlers_lock);
 651
 652         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 653                 if (entry->fn(mvm, &entry->rxb, NULL))
 654                         IWL_WARN(mvm,
 655                                  "returned value from ASYNC handlers are ignored\n");
 656                 iwl_free_rxb(&entry->rxb);
 657                 list_del(&entry->list);
 658                 kfree(entry);
 659         }
 660         mutex_unlock(&mvm->mutex);
 661 }
 662
 663 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 664                                struct iwl_rx_cmd_buffer *rxb,
 665                                struct iwl_device_cmd *cmd)
 666 {
 667         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 668         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 669         u8 i;
 670
 671         /*
 672          * Do the notification wait before RX handlers so
 673          * even if the RX handler consumes the RXB we have
 674          * access to it in the notification wait entry.
 675          */
 676         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 677
 678         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 679                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 680                 struct iwl_async_handler_entry *entry;
 681
 682                 if (rx_h->cmd_id != pkt->hdr.cmd)
 683                         continue;
 684
 685                 if (!rx_h->async)
 686                         return rx_h->fn(mvm, rxb, cmd);
 687
 688                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 689                 /* we can't do much... */
 690                 if (!entry)
 691                         return 0;
 692
 693                 entry->rxb._page = rxb_steal_page(rxb);
 694                 entry->rxb._offset = rxb->_offset;
 695                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 696                 entry->fn = rx_h->fn;
 697                 spin_lock(&mvm->async_handlers_lock);
 698                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 699                 spin_unlock(&mvm->async_handlers_lock);
 700                 schedule_work(&mvm->async_handlers_wk);
 701                 break;
 702         }
 703
 704         return 0;
 705 }
 706
 707 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 708 {
 709         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 710         int mq = mvm->queue_to_mac80211[queue];
 711
 712         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 713                 return;
 714
 715         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 716                 IWL_DEBUG_TX_QUEUES(mvm,
 717                                     "queue %d (mac80211 %d) already stopped\n",
 718                                     queue, mq);
 719                 return;
 720         }
 721
 722         ieee80211_stop_queue(mvm->hw, mq);
 723 }
 724
 725 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 726 {
 727         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 728         int mq = mvm->queue_to_mac80211[queue];
 729
 730         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 731                 return;
 732
 733         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 734                 IWL_DEBUG_TX_QUEUES(mvm,
 735                                     "queue %d (mac80211 %d) still stopped\n",
 736                                     queue, mq);
 737                 return;
 738         }
 739
 740         ieee80211_wake_queue(mvm->hw, mq);
 741 }
 742
 743 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 744 {
 745         if (state)
 746                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 747         else
 748                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 749
 750         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 751 }
 752
 753 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 754 {
 755         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 756         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 757
 758         if (state)
 759                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 760         else
 761                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 762
 763         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 764
 765         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 766         if (calibrating)
 767                 iwl_abort_notification_waits(&mvm->notif_wait);
 768
 769         /*
 770          * Stop the device if we run OPERATIONAL firmware or if we are in the
 771          * middle of the calibrations.
 772          */
 773         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 774 }
 775
 776 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 777 {
 778         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 779         struct ieee80211_tx_info *info;
 780
 781         info = IEEE80211_SKB_CB(skb);
 782         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 783         ieee80211_free_txskb(mvm->hw, skb);
 784 }
 785
 786 struct iwl_mvm_reprobe {
 787         struct device *dev;
 788         struct work_struct work;
 789 };
 790
 791 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 792 {
 793         struct iwl_mvm_reprobe *reprobe;
 794
 795         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 796         if (device_reprobe(reprobe->dev))
 797                 dev_err(reprobe->dev, "reprobe failed!\n");
 798         kfree(reprobe);
 799         module_put(THIS_MODULE);
 800 }
 801
 802 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 803 {
 804         struct iwl_mvm *mvm =
 805                 container_of(work, struct iwl_mvm, fw_error_dump_wk);
 806
 807         mutex_lock(&mvm->mutex);
 808         iwl_mvm_fw_error_dump(mvm);
 809         mutex_unlock(&mvm->mutex);
 810 }
 811
 812 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 813 {
 814         iwl_abort_notification_waits(&mvm->notif_wait);
 815
 816         /*
 817          * This is a bit racy, but worst case we tell mac80211 about
 818          * a stopped/aborted scan when that was already done which
 819          * is not a problem. It is necessary to abort any os scan
 820          * here because mac80211 requires having the scan cleared
 821          * before restarting.
 822          * We'll reset the scan_status to NONE in restart cleanup in
 823          * the next start() call from mac80211. If restart isn't called
 824          * (no fw restart) scan status will stay busy.
 825          */
 826         switch (mvm->scan_status) {
 827         case IWL_MVM_SCAN_NONE:
 828                 break;
 829         case IWL_MVM_SCAN_OS:
 830                 ieee80211_scan_completed(mvm->hw, true);
 831                 break;
 832         case IWL_MVM_SCAN_SCHED:
 833                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 834                 if (!mvm->restart_fw)
 835                         ieee80211_sched_scan_stopped(mvm->hw);
 836                 break;
 837         }
 838
 839         /*
 840          * If we're restarting already, don't cycle restarts.
 841          * If INIT fw asserted, it will likely fail again.
 842          * If WoWLAN fw asserted, don't restart either, mac80211
 843          * can't recover this since we're already half suspended.
 844          */
 845         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 846                 struct iwl_mvm_reprobe *reprobe;
 847
 848                 IWL_ERR(mvm,
 849                         "Firmware error during reconfiguration - reprobe!\n");
 850
 851                 /*
 852                  * get a module reference to avoid doing this while unloading
 853                  * anyway and to avoid scheduling a work with code that's
 854                  * being removed.
 855                  */
 856                 if (!try_module_get(THIS_MODULE)) {
 857                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 858                         return;
 859                 }
 860
 861                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 862                 if (!reprobe) {
 863                         module_put(THIS_MODULE);
 864                         return;
 865                 }
 866                 reprobe->dev = mvm->trans->dev;
 867                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 868                 schedule_work(&reprobe->work);
 869         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
 870                    (!fw_error || mvm->restart_fw)) {
 871                 /* don't let the transport/FW power down */
 872                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 873
 874                 if (fw_error && mvm->restart_fw > 0)
 875                         mvm->restart_fw--;
 876                 ieee80211_restart_hw(mvm->hw);
 877         } else if (fw_error) {
 878                 schedule_work(&mvm->fw_error_dump_wk);
 879         }
 880 }
 881
 882 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 883 {
 884         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 885
 886         iwl_mvm_dump_nic_error_log(mvm);
 887
 888         iwl_mvm_nic_restart(mvm, true);
 889 }
 890
 891 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 892 {
 893         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 894
 895         WARN_ON(1);
 896         iwl_mvm_nic_restart(mvm, true);
 897 }
 898
 899 struct iwl_d0i3_iter_data {
 900         struct iwl_mvm *mvm;
 901         u8 ap_sta_id;
 902         u8 vif_count;
 903         u8 offloading_tid;
 904         bool disable_offloading;
 905 };
 906
 907 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 908                                         struct ieee80211_vif *vif,
 909                                         struct iwl_d0i3_iter_data *iter_data)
 910 {
 911         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 912         struct ieee80211_sta *ap_sta;
 913         struct iwl_mvm_sta *mvmsta;
 914         u32 available_tids = 0;
 915         u8 tid;
 916
 917         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 918                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 919                 return false;
 920
 921         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 922         if (IS_ERR_OR_NULL(ap_sta))
 923                 return false;
 924
 925         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 926         spin_lock_bh(&mvmsta->lock);
 927         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 928                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 929
 930                 /*
 931                  * in case of pending tx packets, don't use this tid
 932                  * for offloading in order to prevent reuse of the same
 933                  * qos seq counters.
 934                  */
 935                 if (iwl_mvm_tid_queued(tid_data))
 936                         continue;
 937
 938                 if (tid_data->state != IWL_AGG_OFF)
 939                         continue;
 940
 941                 available_tids |= BIT(tid);
 942         }
 943         spin_unlock_bh(&mvmsta->lock);
 944
 945         /*
 946          * disallow protocol offloading if we have no available tid
 947          * (with no pending frames and no active aggregation,
 948          * as we don't handle "holes" properly - the scheduler needs the
 949          * frame's seq number and TFD index to match)
 950          */
 951         if (!available_tids)
 952                 return true;
 953
 954         /* for simplicity, just use the first available tid */
 955         iter_data->offloading_tid = ffs(available_tids) - 1;
 956         return false;
 957 }
 958
 959 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 960                                         struct ieee80211_vif *vif)
 961 {
 962         struct iwl_d0i3_iter_data *data = _data;
 963         struct iwl_mvm *mvm = data->mvm;
 964         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 965         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 966
 967         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 968         if (vif->type != NL80211_IFTYPE_STATION ||
 969             !vif->bss_conf.assoc)
 970                 return;
 971
 972         /*
 973          * in case of pending tx packets or active aggregations,
 974          * avoid offloading features in order to prevent reuse of
 975          * the same qos seq counters.
 976          */
 977         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 978                 data->disable_offloading = true;
 979
 980         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 981         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 982
 983         /*
 984          * on init/association, mvm already configures POWER_TABLE_CMD
 985          * and REPLY_MCAST_FILTER_CMD, so currently don't
 986          * reconfigure them (we might want to use different
 987          * params later on, though).
 988          */
 989         data->ap_sta_id = mvmvif->ap_sta_id;
 990         data->vif_count++;
 991 }
 992
 993 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
 994                                     struct iwl_wowlan_config_cmd_v3 *cmd,
 995                                     struct iwl_d0i3_iter_data *iter_data)
 996 {
 997         struct ieee80211_sta *ap_sta;
 998         struct iwl_mvm_sta *mvm_ap_sta;
 999
1000         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1001                 return;
1002
1003         rcu_read_lock();
1004
1005         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1006         if (IS_ERR_OR_NULL(ap_sta))
1007                 goto out;
1008
1009         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1010         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
1011         cmd->offloading_tid = iter_data->offloading_tid;
1012
1013         /*
1014          * The d0i3 uCode takes care of the nonqos counters,
1015          * so configure only the qos seq ones.
1016          */
1017         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
1018 out:
1019         rcu_read_unlock();
1020 }
1021 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1022 {
1023         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1024         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1025         int ret;
1026         struct iwl_d0i3_iter_data d0i3_iter_data = {
1027                 .mvm = mvm,
1028         };
1029         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1030                 .common = {
1031                         .wakeup_filter =
1032                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1033                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
1034                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1035                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1036                 },
1037         };
1038         struct iwl_d3_manager_config d3_cfg_cmd = {
1039                 .min_sleep_time = cpu_to_le32(1000),
1040         };
1041
1042         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1043
1044         /* make sure we have no running tx while configuring the qos */
1045         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1046         synchronize_net();
1047
1048         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1049                                                    IEEE80211_IFACE_ITER_NORMAL,
1050                                                    iwl_mvm_enter_d0i3_iterator,
1051                                                    &d0i3_iter_data);
1052         if (d0i3_iter_data.vif_count == 1) {
1053                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1054                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1055         } else {
1056                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1057                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1058                 mvm->d0i3_offloading = false;
1059         }
1060
1061         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1062         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1063                                    sizeof(wowlan_config_cmd),
1064                                    &wowlan_config_cmd);
1065         if (ret)
1066                 return ret;
1067
1068         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1069                                     flags | CMD_MAKE_TRANS_IDLE,
1070                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1071 }
1072
1073 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1074                                        struct ieee80211_vif *vif)
1075 {
1076         struct iwl_mvm *mvm = _data;
1077         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1078
1079         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1080         if (vif->type != NL80211_IFTYPE_STATION ||
1081             !vif->bss_conf.assoc)
1082                 return;
1083
1084         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1085 }
1086
1087 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1088                                          struct ieee80211_vif *vif)
1089 {
1090         struct iwl_mvm *mvm = data;
1091         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1092
1093         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1094             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1095                 ieee80211_connection_loss(vif);
1096 }
1097
1098 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1099 {
1100         struct ieee80211_sta *sta = NULL;
1101         struct iwl_mvm_sta *mvm_ap_sta;
1102         int i;
1103         bool wake_queues = false;
1104
1105         lockdep_assert_held(&mvm->mutex);
1106
1107         spin_lock_bh(&mvm->d0i3_tx_lock);
1108
1109         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1110                 goto out;
1111
1112         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1113
1114         /* get the sta in order to update seq numbers and re-enqueue skbs */
1115         sta = rcu_dereference_protected(
1116                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1117                         lockdep_is_held(&mvm->mutex));
1118
1119         if (IS_ERR_OR_NULL(sta)) {
1120                 sta = NULL;
1121                 goto out;
1122         }
1123
1124         if (mvm->d0i3_offloading && qos_seq) {
1125                 /* update qos seq numbers if offloading was enabled */
1126                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1127                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1128                         u16 seq = le16_to_cpu(qos_seq[i]);
1129                         /* firmware stores last-used one, we store next one */
1130                         seq += 0x10;
1131                         mvm_ap_sta->tid_data[i].seq_number = seq;
1132                 }
1133         }
1134 out:
1135         /* re-enqueue (or drop) all packets */
1136         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1137                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1138
1139                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1140                         ieee80211_free_txskb(mvm->hw, skb);
1141
1142                 /* if the skb_queue is not empty, we need to wake queues */
1143                 wake_queues = true;
1144         }
1145         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1146         wake_up(&mvm->d0i3_exit_waitq);
1147         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1148         if (wake_queues)
1149                 ieee80211_wake_queues(mvm->hw);
1150
1151         spin_unlock_bh(&mvm->d0i3_tx_lock);
1152 }
1153
1154 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1155 {
1156         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1157         struct iwl_host_cmd get_status_cmd = {
1158                 .id = WOWLAN_GET_STATUSES,
1159                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1160         };
1161         struct iwl_wowlan_status *status;
1162         int ret;
1163         u32 disconnection_reasons, wakeup_reasons;
1164         __le16 *qos_seq = NULL;
1165
1166         mutex_lock(&mvm->mutex);
1167         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1168         if (ret)
1169                 goto out;
1170
1171         if (!get_status_cmd.resp_pkt)
1172                 goto out;
1173
1174         status = (void *)get_status_cmd.resp_pkt->data;
1175         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1176         qos_seq = status->qos_seq_ctr;
1177
1178         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1179
1180         disconnection_reasons =
1181                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1182                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1183         if (wakeup_reasons & disconnection_reasons)
1184                 ieee80211_iterate_active_interfaces(
1185                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1186                         iwl_mvm_d0i3_disconnect_iter, mvm);
1187
1188         iwl_free_resp(&get_status_cmd);
1189 out:
1190         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1191         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1192         mutex_unlock(&mvm->mutex);
1193 }
1194
1195 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1196 {
1197         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1198                     CMD_WAKE_UP_TRANS;
1199         int ret;
1200
1201         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1202
1203         mutex_lock(&mvm->d0i3_suspend_mutex);
1204         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1205                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1206                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1207                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1208                 return 0;
1209         }
1210         mutex_unlock(&mvm->d0i3_suspend_mutex);
1211
1212         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1213         if (ret)
1214                 goto out;
1215
1216         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1217                                                    IEEE80211_IFACE_ITER_NORMAL,
1218                                                    iwl_mvm_exit_d0i3_iterator,
1219                                                    mvm);
1220 out:
1221         schedule_work(&mvm->d0i3_exit_work);
1222         return ret;
1223 }
1224
1225 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1226 {
1227         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1228
1229         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1230         return _iwl_mvm_exit_d0i3(mvm);
1231 }
1232
1233 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1234                              struct napi_struct *napi,
1235                              struct net_device *napi_dev,
1236                              int (*poll)(struct napi_struct *, int),
1237                              int weight)
1238 {
1239         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1240
1241         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1242 }
1243
1244 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1245         .start = iwl_op_mode_mvm_start,
1246         .stop = iwl_op_mode_mvm_stop,
1247         .rx = iwl_mvm_rx_dispatch,
1248         .queue_full = iwl_mvm_stop_sw_queue,
1249         .queue_not_full = iwl_mvm_wake_sw_queue,
1250         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1251         .free_skb = iwl_mvm_free_skb,
1252         .nic_error = iwl_mvm_nic_error,
1253         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1254         .nic_config = iwl_mvm_nic_config,
1255         .enter_d0i3 = iwl_mvm_enter_d0i3,
1256         .exit_d0i3 = iwl_mvm_exit_d0i3,
1257         .napi_add = iwl_mvm_napi_add,
1258 };