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
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/module.h>
  66 #include <linux/vmalloc.h>
  67 #include <net/mac80211.h>
  68
  69 #include "iwl-notif-wait.h"
  70 #include "iwl-trans.h"
  71 #include "iwl-op-mode.h"
  72 #include "iwl-fw.h"
  73 #include "iwl-debug.h"
  74 #include "iwl-drv.h"
  75 #include "iwl-modparams.h"
  76 #include "mvm.h"
  77 #include "iwl-phy-db.h"
  78 #include "iwl-eeprom-parse.h"
  79 #include "iwl-csr.h"
  80 #include "iwl-io.h"
  81 #include "iwl-prph.h"
  82 #include "rs.h"
  83 #include "fw-api-scan.h"
  84 #include "time-event.h"
  85 #include "iwl-fw-error-dump.h"
  86
  87 /*
  88  * module name, copyright, version, etc.
  89  */
  90 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  91
  92 #define DRV_VERSION     IWLWIFI_VERSION
  93
  94 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  95 MODULE_VERSION(DRV_VERSION);
  96 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  97 MODULE_LICENSE("GPL");
  98
  99 static const struct iwl_op_mode_ops iwl_mvm_ops;
 100
 101 struct iwl_mvm_mod_params iwlmvm_mod_params = {
 102         .power_scheme = IWL_POWER_SCHEME_BPS,
 103         /* rest of fields are 0 by default */
 104 };
 105
 106 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 107 MODULE_PARM_DESC(init_dbg,
 108                  "set to true to debug an ASSERT in INIT fw (default: false");
 109 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 110 MODULE_PARM_DESC(power_scheme,
 111                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 112
 113 /*
 114  * module init and exit functions
 115  */
 116 static int __init iwl_mvm_init(void)
 117 {
 118         int ret;
 119
 120         ret = iwl_mvm_rate_control_register();
 121         if (ret) {
 122                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 123                 return ret;
 124         }
 125
 126         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 127
 128         if (ret) {
 129                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 130                 iwl_mvm_rate_control_unregister();
 131         }
 132
 133         return ret;
 134 }
 135 module_init(iwl_mvm_init);
 136
 137 static void __exit iwl_mvm_exit(void)
 138 {
 139         iwl_opmode_deregister("iwlmvm");
 140         iwl_mvm_rate_control_unregister();
 141 }
 142 module_exit(iwl_mvm_exit);
 143
 144 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 145 {
 146         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 147         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 148         u32 reg_val = 0;
 149
 150         radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 151                           FW_PHY_CFG_RADIO_TYPE_POS;
 152         radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
 153                           FW_PHY_CFG_RADIO_STEP_POS;
 154         radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
 155                           FW_PHY_CFG_RADIO_DASH_POS;
 156
 157         /* SKU control */
 158         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 160         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 161                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 162
 163         /* radio configuration */
 164         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 165         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 166         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 167
 168         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 169                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 170
 171         /*
 172          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 173          * shouldn't be set to any non-zero value. The same is supposed to be
 174          * true of the other HW, but unsetting them (such as the 7260) causes
 175          * automatic tests to fail on seemingly unrelated errors. Need to
 176          * further investigate this, but for now we'll separate cases.
 177          */
 178         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 179                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 180
 181         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 182                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 185                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 186                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 187                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 188                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 189                                 reg_val);
 190
 191         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 192                        radio_cfg_step, radio_cfg_dash);
 193
 194         /*
 195          * W/A : NIC is stuck in a reset state after Early PCIe power off
 196          * (PCIe power is lost before PERST# is asserted), causing ME FW
 197          * to lose ownership and not being able to obtain it back.
 198          */
 199         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 200                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 201                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 202                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 203 }
 204
 205 struct iwl_rx_handlers {
 206         u8 cmd_id;
 207         bool async;
 208         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 209                   struct iwl_device_cmd *cmd);
 210 };
 211
 212 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 213         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 214
 215 /*
 216  * Handlers for fw notifications
 217  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 218  * This list should be in order of frequency for performance purposes.
 219  *
 220  * The handler can be SYNC - this means that it will be called in the Rx path
 221  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 222  * only in this case!), it should be set as ASYNC. In that case, it will be
 223  * called from a worker with mvm->mutex held.
 224  */
 225 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 226         RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
 227         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 228         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 229         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 230
 231         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 232         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 233         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 234         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 235                    iwl_mvm_rx_ant_coupling_notif, true),
 236
 237         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 238
 239         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 240
 241         RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
 242         RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, true),
 243         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 244                    iwl_mvm_rx_scan_offload_complete_notif, true),
 245         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
 246                    false),
 247         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 248                    true),
 249
 250         RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
 251         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 252
 253         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 254                    false),
 255
 256         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 257         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 258                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 259         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 260
 261 };
 262 #undef RX_HANDLER
 263 #define CMD(x) [x] = #x
 264
 265 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 266         CMD(MVM_ALIVE),
 267         CMD(REPLY_ERROR),
 268         CMD(INIT_COMPLETE_NOTIF),
 269         CMD(PHY_CONTEXT_CMD),
 270         CMD(MGMT_MCAST_KEY),
 271         CMD(TX_CMD),
 272         CMD(TXPATH_FLUSH),
 273         CMD(MAC_CONTEXT_CMD),
 274         CMD(TIME_EVENT_CMD),
 275         CMD(TIME_EVENT_NOTIFICATION),
 276         CMD(BINDING_CONTEXT_CMD),
 277         CMD(TIME_QUOTA_CMD),
 278         CMD(NON_QOS_TX_COUNTER_CMD),
 279         CMD(RADIO_VERSION_NOTIFICATION),
 280         CMD(SCAN_REQUEST_CMD),
 281         CMD(SCAN_ABORT_CMD),
 282         CMD(SCAN_START_NOTIFICATION),
 283         CMD(SCAN_RESULTS_NOTIFICATION),
 284         CMD(SCAN_COMPLETE_NOTIFICATION),
 285         CMD(NVM_ACCESS_CMD),
 286         CMD(PHY_CONFIGURATION_CMD),
 287         CMD(CALIB_RES_NOTIF_PHY_DB),
 288         CMD(SET_CALIB_DEFAULT_CMD),
 289         CMD(CALIBRATION_COMPLETE_NOTIFICATION),
 290         CMD(ADD_STA_KEY),
 291         CMD(ADD_STA),
 292         CMD(REMOVE_STA),
 293         CMD(LQ_CMD),
 294         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 295         CMD(MATCH_FOUND_NOTIFICATION),
 296         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 297         CMD(SCAN_OFFLOAD_ABORT_CMD),
 298         CMD(HOT_SPOT_CMD),
 299         CMD(SCAN_OFFLOAD_COMPLETE),
 300         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 301         CMD(SCAN_ITERATION_COMPLETE),
 302         CMD(POWER_TABLE_CMD),
 303         CMD(WEP_KEY),
 304         CMD(REPLY_RX_PHY_CMD),
 305         CMD(REPLY_RX_MPDU_CMD),
 306         CMD(BEACON_NOTIFICATION),
 307         CMD(BEACON_TEMPLATE_CMD),
 308         CMD(STATISTICS_NOTIFICATION),
 309         CMD(EOSP_NOTIFICATION),
 310         CMD(REDUCE_TX_POWER_CMD),
 311         CMD(TX_ANT_CONFIGURATION_CMD),
 312         CMD(D3_CONFIG_CMD),
 313         CMD(D0I3_END_CMD),
 314         CMD(PROT_OFFLOAD_CONFIG_CMD),
 315         CMD(OFFLOADS_QUERY_CMD),
 316         CMD(REMOTE_WAKE_CONFIG_CMD),
 317         CMD(WOWLAN_PATTERNS),
 318         CMD(WOWLAN_CONFIGURATION),
 319         CMD(WOWLAN_TSC_RSC_PARAM),
 320         CMD(WOWLAN_TKIP_PARAM),
 321         CMD(WOWLAN_KEK_KCK_MATERIAL),
 322         CMD(WOWLAN_GET_STATUSES),
 323         CMD(WOWLAN_TX_POWER_PER_DB),
 324         CMD(NET_DETECT_CONFIG_CMD),
 325         CMD(NET_DETECT_PROFILES_QUERY_CMD),
 326         CMD(NET_DETECT_PROFILES_CMD),
 327         CMD(NET_DETECT_HOTSPOTS_CMD),
 328         CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
 329         CMD(CARD_STATE_NOTIFICATION),
 330         CMD(MISSED_BEACONS_NOTIFICATION),
 331         CMD(BT_COEX_PRIO_TABLE),
 332         CMD(BT_COEX_PROT_ENV),
 333         CMD(BT_PROFILE_NOTIFICATION),
 334         CMD(BT_CONFIG),
 335         CMD(MCAST_FILTER_CMD),
 336         CMD(BCAST_FILTER_CMD),
 337         CMD(REPLY_SF_CFG_CMD),
 338         CMD(REPLY_BEACON_FILTERING_CMD),
 339         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 340         CMD(DTS_MEASUREMENT_NOTIFICATION),
 341         CMD(REPLY_THERMAL_MNG_BACKOFF),
 342         CMD(MAC_PM_POWER_TABLE),
 343         CMD(LTR_CONFIG),
 344         CMD(BT_COEX_CI),
 345         CMD(BT_COEX_UPDATE_SW_BOOST),
 346         CMD(BT_COEX_UPDATE_CORUN_LUT),
 347         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 348         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 349         CMD(ANTENNA_COUPLING_NOTIFICATION),
 350         CMD(SCD_QUEUE_CFG),
 351         CMD(SCAN_CFG_CMD),
 352         CMD(SCAN_REQ_UMAC),
 353         CMD(SCAN_ABORT_UMAC),
 354         CMD(SCAN_COMPLETE_UMAC),
 355 };
 356 #undef CMD
 357
 358 /* this forward declaration can avoid to export the function */
 359 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 360 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 361
 362 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 363 {
 364         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 365
 366         if (!pwr_tx_backoff)
 367                 return 0;
 368
 369         while (pwr_tx_backoff->pwr) {
 370                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 371                         return pwr_tx_backoff->backoff;
 372
 373                 pwr_tx_backoff++;
 374         }
 375
 376         return 0;
 377 }
 378
 379 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 380
 381 static struct iwl_op_mode *
 382 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 383                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 384 {
 385         struct ieee80211_hw *hw;
 386         struct iwl_op_mode *op_mode;
 387         struct iwl_mvm *mvm;
 388         struct iwl_trans_config trans_cfg = {};
 389         static const u8 no_reclaim_cmds[] = {
 390                 TX_CMD,
 391         };
 392         int err, scan_size;
 393         u32 min_backoff;
 394
 395         /*
 396          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 397          * index all over the driver - check that its value corresponds to the
 398          * array size.
 399          */
 400         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 401
 402         /********************************
 403          * 1. Allocating and configuring HW data
 404          ********************************/
 405         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 406                                 sizeof(struct iwl_mvm),
 407                                 &iwl_mvm_hw_ops);
 408         if (!hw)
 409                 return NULL;
 410
 411         if (cfg->max_rx_agg_size)
 412                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 413
 414         if (cfg->max_tx_agg_size)
 415                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 416
 417         op_mode = hw->priv;
 418         op_mode->ops = &iwl_mvm_ops;
 419
 420         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 421         mvm->dev = trans->dev;
 422         mvm->trans = trans;
 423         mvm->cfg = cfg;
 424         mvm->fw = fw;
 425         mvm->hw = hw;
 426
 427         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 428
 429         mvm->aux_queue = 15;
 430         mvm->first_agg_queue = 16;
 431         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 432         if (mvm->cfg->base_params->num_of_queues == 16) {
 433                 mvm->aux_queue = 11;
 434                 mvm->first_agg_queue = 12;
 435         }
 436         mvm->sf_state = SF_UNINIT;
 437         mvm->low_latency_agg_frame_limit = 6;
 438         mvm->cur_ucode = IWL_UCODE_INIT;
 439
 440         mutex_init(&mvm->mutex);
 441         mutex_init(&mvm->d0i3_suspend_mutex);
 442         spin_lock_init(&mvm->async_handlers_lock);
 443         INIT_LIST_HEAD(&mvm->time_event_list);
 444         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 445         INIT_LIST_HEAD(&mvm->async_handlers_list);
 446         spin_lock_init(&mvm->time_event_lock);
 447
 448         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 449         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 450         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 451         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 452         INIT_WORK(&mvm->fw_error_dump_wk, iwl_mvm_fw_error_dump_wk);
 453
 454         spin_lock_init(&mvm->d0i3_tx_lock);
 455         spin_lock_init(&mvm->refs_lock);
 456         skb_queue_head_init(&mvm->d0i3_tx);
 457         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 458
 459         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 460
 461         /*
 462          * Populate the state variables that the transport layer needs
 463          * to know about.
 464          */
 465         trans_cfg.op_mode = op_mode;
 466         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 467         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 468         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 469
 470         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 471                 trans_cfg.bc_table_dword = true;
 472
 473         if (!iwlwifi_mod_params.wd_disable)
 474                 trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
 475         else
 476                 trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
 477
 478         trans_cfg.command_names = iwl_mvm_cmd_strings;
 479
 480         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 481         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 482         trans_cfg.scd_set_active = true;
 483
 484         snprintf(mvm->hw->wiphy->fw_version,
 485                  sizeof(mvm->hw->wiphy->fw_version),
 486                  "%s", fw->fw_version);
 487
 488         /* Configure transport layer */
 489         iwl_trans_configure(mvm->trans, &trans_cfg);
 490
 491         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 492         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 493
 494         /* set up notification wait support */
 495         iwl_notification_wait_init(&mvm->notif_wait);
 496
 497         /* Init phy db */
 498         mvm->phy_db = iwl_phy_db_init(trans);
 499         if (!mvm->phy_db) {
 500                 IWL_ERR(mvm, "Cannot init phy_db\n");
 501                 goto out_free;
 502         }
 503
 504         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 505                  mvm->cfg->name, mvm->trans->hw_rev);
 506
 507         min_backoff = calc_min_backoff(trans, cfg);
 508         iwl_mvm_tt_initialize(mvm, min_backoff);
 509         /* set the nvm_file_name according to priority */
 510         if (iwlwifi_mod_params.nvm_file)
 511                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 512         else
 513                 mvm->nvm_file_name = mvm->cfg->default_nvm_file;
 514
 515         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 516                  "not allowing power-up and not having nvm_file\n"))
 517                 goto out_free;
 518
 519         /*
 520          * Even if nvm exists in the nvm_file driver should read again the nvm
 521          * from the nic because there might be entries that exist in the OTP
 522          * and not in the file.
 523          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 524          */
 525         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 526                 err = iwl_nvm_init(mvm, false);
 527                 if (err)
 528                         goto out_free;
 529         } else {
 530                 err = iwl_trans_start_hw(mvm->trans);
 531                 if (err)
 532                         goto out_free;
 533
 534                 mutex_lock(&mvm->mutex);
 535                 err = iwl_run_init_mvm_ucode(mvm, true);
 536                 if (!err || !iwlmvm_mod_params.init_dbg)
 537                         iwl_trans_stop_device(trans);
 538                 mutex_unlock(&mvm->mutex);
 539                 /* returns 0 if successful, 1 if success but in rfkill */
 540                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 541                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 542                         goto out_free;
 543                 }
 544         }
 545
 546         scan_size = iwl_mvm_scan_size(mvm);
 547
 548         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 549         if (!mvm->scan_cmd)
 550                 goto out_free;
 551
 552         err = iwl_mvm_mac_setup_register(mvm);
 553         if (err)
 554                 goto out_free;
 555
 556         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 557         if (err)
 558                 goto out_unregister;
 559
 560         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 561
 562         /* rpm starts with a taken ref. only set the appropriate bit here. */
 563         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 564
 565         return op_mode;
 566
 567  out_unregister:
 568         ieee80211_unregister_hw(mvm->hw);
 569         iwl_mvm_leds_exit(mvm);
 570  out_free:
 571         iwl_phy_db_free(mvm->phy_db);
 572         kfree(mvm->scan_cmd);
 573         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 574                 iwl_trans_op_mode_leave(trans);
 575         ieee80211_free_hw(mvm->hw);
 576         return NULL;
 577 }
 578
 579 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 580 {
 581         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 582         int i;
 583
 584         iwl_mvm_leds_exit(mvm);
 585
 586         iwl_mvm_tt_exit(mvm);
 587
 588         ieee80211_unregister_hw(mvm->hw);
 589
 590         kfree(mvm->scan_cmd);
 591         kfree(mvm->mcast_filter_cmd);
 592         mvm->mcast_filter_cmd = NULL;
 593
 594 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 595         kfree(mvm->d3_resume_sram);
 596         if (mvm->nd_config) {
 597                 kfree(mvm->nd_config->match_sets);
 598                 kfree(mvm->nd_config);
 599                 mvm->nd_config = NULL;
 600                 kfree(mvm->nd_ies);
 601                 mvm->nd_ies = NULL;
 602         }
 603 #endif
 604
 605         iwl_trans_op_mode_leave(mvm->trans);
 606
 607         iwl_phy_db_free(mvm->phy_db);
 608         mvm->phy_db = NULL;
 609
 610         iwl_free_nvm_data(mvm->nvm_data);
 611         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 612                 kfree(mvm->nvm_sections[i].data);
 613
 614         ieee80211_free_hw(mvm->hw);
 615 }
 616
 617 struct iwl_async_handler_entry {
 618         struct list_head list;
 619         struct iwl_rx_cmd_buffer rxb;
 620         int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 621                   struct iwl_device_cmd *cmd);
 622 };
 623
 624 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 625 {
 626         struct iwl_async_handler_entry *entry, *tmp;
 627
 628         spin_lock_bh(&mvm->async_handlers_lock);
 629         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 630                 iwl_free_rxb(&entry->rxb);
 631                 list_del(&entry->list);
 632                 kfree(entry);
 633         }
 634         spin_unlock_bh(&mvm->async_handlers_lock);
 635 }
 636
 637 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 638 {
 639         struct iwl_mvm *mvm =
 640                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 641         struct iwl_async_handler_entry *entry, *tmp;
 642         struct list_head local_list;
 643
 644         INIT_LIST_HEAD(&local_list);
 645
 646         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 647         mutex_lock(&mvm->mutex);
 648
 649         /*
 650          * Sync with Rx path with a lock. Remove all the entries from this list,
 651          * add them to a local one (lock free), and then handle them.
 652          */
 653         spin_lock_bh(&mvm->async_handlers_lock);
 654         list_splice_init(&mvm->async_handlers_list, &local_list);
 655         spin_unlock_bh(&mvm->async_handlers_lock);
 656
 657         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 658                 if (entry->fn(mvm, &entry->rxb, NULL))
 659                         IWL_WARN(mvm,
 660                                  "returned value from ASYNC handlers are ignored\n");
 661                 iwl_free_rxb(&entry->rxb);
 662                 list_del(&entry->list);
 663                 kfree(entry);
 664         }
 665         mutex_unlock(&mvm->mutex);
 666 }
 667
 668 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 669                                struct iwl_rx_cmd_buffer *rxb,
 670                                struct iwl_device_cmd *cmd)
 671 {
 672         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 673         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 674         u8 i;
 675
 676         /*
 677          * Do the notification wait before RX handlers so
 678          * even if the RX handler consumes the RXB we have
 679          * access to it in the notification wait entry.
 680          */
 681         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 682
 683         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 684                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 685                 struct iwl_async_handler_entry *entry;
 686
 687                 if (rx_h->cmd_id != pkt->hdr.cmd)
 688                         continue;
 689
 690                 if (!rx_h->async)
 691                         return rx_h->fn(mvm, rxb, cmd);
 692
 693                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 694                 /* we can't do much... */
 695                 if (!entry)
 696                         return 0;
 697
 698                 entry->rxb._page = rxb_steal_page(rxb);
 699                 entry->rxb._offset = rxb->_offset;
 700                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 701                 entry->fn = rx_h->fn;
 702                 spin_lock(&mvm->async_handlers_lock);
 703                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 704                 spin_unlock(&mvm->async_handlers_lock);
 705                 schedule_work(&mvm->async_handlers_wk);
 706                 break;
 707         }
 708
 709         return 0;
 710 }
 711
 712 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 713 {
 714         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 715         int mq = mvm->queue_to_mac80211[queue];
 716
 717         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 718                 return;
 719
 720         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 721                 IWL_DEBUG_TX_QUEUES(mvm,
 722                                     "queue %d (mac80211 %d) already stopped\n",
 723                                     queue, mq);
 724                 return;
 725         }
 726
 727         ieee80211_stop_queue(mvm->hw, mq);
 728 }
 729
 730 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 731 {
 732         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 733         int mq = mvm->queue_to_mac80211[queue];
 734
 735         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 736                 return;
 737
 738         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 739                 IWL_DEBUG_TX_QUEUES(mvm,
 740                                     "queue %d (mac80211 %d) still stopped\n",
 741                                     queue, mq);
 742                 return;
 743         }
 744
 745         ieee80211_wake_queue(mvm->hw, mq);
 746 }
 747
 748 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 749 {
 750         if (state)
 751                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 752         else
 753                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 754
 755         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 756 }
 757
 758 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 759 {
 760         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 761         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 762
 763         if (state)
 764                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 765         else
 766                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 767
 768         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 769
 770         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 771         if (calibrating)
 772                 iwl_abort_notification_waits(&mvm->notif_wait);
 773
 774         /*
 775          * Stop the device if we run OPERATIONAL firmware or if we are in the
 776          * middle of the calibrations.
 777          */
 778         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 779 }
 780
 781 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 782 {
 783         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 784         struct ieee80211_tx_info *info;
 785
 786         info = IEEE80211_SKB_CB(skb);
 787         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 788         ieee80211_free_txskb(mvm->hw, skb);
 789 }
 790
 791 struct iwl_mvm_reprobe {
 792         struct device *dev;
 793         struct work_struct work;
 794 };
 795
 796 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 797 {
 798         struct iwl_mvm_reprobe *reprobe;
 799
 800         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 801         if (device_reprobe(reprobe->dev))
 802                 dev_err(reprobe->dev, "reprobe failed!\n");
 803         kfree(reprobe);
 804         module_put(THIS_MODULE);
 805 }
 806
 807 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 808 {
 809         struct iwl_mvm *mvm =
 810                 container_of(work, struct iwl_mvm, fw_error_dump_wk);
 811
 812         mutex_lock(&mvm->mutex);
 813         iwl_mvm_fw_error_dump(mvm);
 814         mutex_unlock(&mvm->mutex);
 815 }
 816
 817 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 818 {
 819         iwl_abort_notification_waits(&mvm->notif_wait);
 820
 821         /*
 822          * This is a bit racy, but worst case we tell mac80211 about
 823          * a stopped/aborted scan when that was already done which
 824          * is not a problem. It is necessary to abort any os scan
 825          * here because mac80211 requires having the scan cleared
 826          * before restarting.
 827          * We'll reset the scan_status to NONE in restart cleanup in
 828          * the next start() call from mac80211. If restart isn't called
 829          * (no fw restart) scan status will stay busy.
 830          */
 831         switch (mvm->scan_status) {
 832         case IWL_MVM_SCAN_NONE:
 833                 break;
 834         case IWL_MVM_SCAN_OS:
 835                 ieee80211_scan_completed(mvm->hw, true);
 836                 break;
 837         case IWL_MVM_SCAN_SCHED:
 838                 /* Sched scan will be restarted by mac80211 in restart_hw. */
 839                 if (!mvm->restart_fw)
 840                         ieee80211_sched_scan_stopped(mvm->hw);
 841                 break;
 842         }
 843
 844         /*
 845          * If we're restarting already, don't cycle restarts.
 846          * If INIT fw asserted, it will likely fail again.
 847          * If WoWLAN fw asserted, don't restart either, mac80211
 848          * can't recover this since we're already half suspended.
 849          */
 850         if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 851                 struct iwl_mvm_reprobe *reprobe;
 852
 853                 IWL_ERR(mvm,
 854                         "Firmware error during reconfiguration - reprobe!\n");
 855
 856                 /*
 857                  * get a module reference to avoid doing this while unloading
 858                  * anyway and to avoid scheduling a work with code that's
 859                  * being removed.
 860                  */
 861                 if (!try_module_get(THIS_MODULE)) {
 862                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 863                         return;
 864                 }
 865
 866                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 867                 if (!reprobe) {
 868                         module_put(THIS_MODULE);
 869                         return;
 870                 }
 871                 reprobe->dev = mvm->trans->dev;
 872                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 873                 schedule_work(&reprobe->work);
 874         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
 875                    (!fw_error || mvm->restart_fw)) {
 876                 /* don't let the transport/FW power down */
 877                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 878
 879                 if (fw_error && mvm->restart_fw > 0)
 880                         mvm->restart_fw--;
 881                 ieee80211_restart_hw(mvm->hw);
 882         } else if (fw_error) {
 883                 schedule_work(&mvm->fw_error_dump_wk);
 884         }
 885 }
 886
 887 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 888 {
 889         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 890
 891         iwl_mvm_dump_nic_error_log(mvm);
 892
 893         iwl_mvm_nic_restart(mvm, true);
 894 }
 895
 896 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 897 {
 898         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 899
 900         WARN_ON(1);
 901         iwl_mvm_nic_restart(mvm, true);
 902 }
 903
 904 struct iwl_d0i3_iter_data {
 905         struct iwl_mvm *mvm;
 906         u8 ap_sta_id;
 907         u8 vif_count;
 908         u8 offloading_tid;
 909         bool disable_offloading;
 910 };
 911
 912 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 913                                         struct ieee80211_vif *vif,
 914                                         struct iwl_d0i3_iter_data *iter_data)
 915 {
 916         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 917         struct ieee80211_sta *ap_sta;
 918         struct iwl_mvm_sta *mvmsta;
 919         u32 available_tids = 0;
 920         u8 tid;
 921
 922         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 923                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 924                 return false;
 925
 926         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 927         if (IS_ERR_OR_NULL(ap_sta))
 928                 return false;
 929
 930         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 931         spin_lock_bh(&mvmsta->lock);
 932         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 933                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 934
 935                 /*
 936                  * in case of pending tx packets, don't use this tid
 937                  * for offloading in order to prevent reuse of the same
 938                  * qos seq counters.
 939                  */
 940                 if (iwl_mvm_tid_queued(tid_data))
 941                         continue;
 942
 943                 if (tid_data->state != IWL_AGG_OFF)
 944                         continue;
 945
 946                 available_tids |= BIT(tid);
 947         }
 948         spin_unlock_bh(&mvmsta->lock);
 949
 950         /*
 951          * disallow protocol offloading if we have no available tid
 952          * (with no pending frames and no active aggregation,
 953          * as we don't handle "holes" properly - the scheduler needs the
 954          * frame's seq number and TFD index to match)
 955          */
 956         if (!available_tids)
 957                 return true;
 958
 959         /* for simplicity, just use the first available tid */
 960         iter_data->offloading_tid = ffs(available_tids) - 1;
 961         return false;
 962 }
 963
 964 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
 965                                         struct ieee80211_vif *vif)
 966 {
 967         struct iwl_d0i3_iter_data *data = _data;
 968         struct iwl_mvm *mvm = data->mvm;
 969         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 970         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
 971
 972         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
 973         if (vif->type != NL80211_IFTYPE_STATION ||
 974             !vif->bss_conf.assoc)
 975                 return;
 976
 977         /*
 978          * in case of pending tx packets or active aggregations,
 979          * avoid offloading features in order to prevent reuse of
 980          * the same qos seq counters.
 981          */
 982         if (iwl_mvm_disallow_offloading(mvm, vif, data))
 983                 data->disable_offloading = true;
 984
 985         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
 986         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
 987
 988         /*
 989          * on init/association, mvm already configures POWER_TABLE_CMD
 990          * and REPLY_MCAST_FILTER_CMD, so currently don't
 991          * reconfigure them (we might want to use different
 992          * params later on, though).
 993          */
 994         data->ap_sta_id = mvmvif->ap_sta_id;
 995         data->vif_count++;
 996 }
 997
 998 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
 999                                     struct iwl_wowlan_config_cmd_v3 *cmd,
1000                                     struct iwl_d0i3_iter_data *iter_data)
1001 {
1002         struct ieee80211_sta *ap_sta;
1003         struct iwl_mvm_sta *mvm_ap_sta;
1004
1005         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1006                 return;
1007
1008         rcu_read_lock();
1009
1010         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1011         if (IS_ERR_OR_NULL(ap_sta))
1012                 goto out;
1013
1014         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1015         cmd->common.is_11n_connection = ap_sta->ht_cap.ht_supported;
1016         cmd->offloading_tid = iter_data->offloading_tid;
1017
1018         /*
1019          * The d0i3 uCode takes care of the nonqos counters,
1020          * so configure only the qos seq ones.
1021          */
1022         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &cmd->common);
1023 out:
1024         rcu_read_unlock();
1025 }
1026 static int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1027 {
1028         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1029         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1030         int ret;
1031         struct iwl_d0i3_iter_data d0i3_iter_data = {
1032                 .mvm = mvm,
1033         };
1034         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {
1035                 .common = {
1036                         .wakeup_filter =
1037                                 cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1038                                             IWL_WOWLAN_WAKEUP_BEACON_MISS |
1039                                             IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1040                                             IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1041                 },
1042         };
1043         struct iwl_d3_manager_config d3_cfg_cmd = {
1044                 .min_sleep_time = cpu_to_le32(1000),
1045         };
1046
1047         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1048
1049         /* make sure we have no running tx while configuring the qos */
1050         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1051         synchronize_net();
1052
1053         /*
1054          * iwl_mvm_ref_sync takes a reference before checking the flag.
1055          * so by checking there is no held reference we prevent a state
1056          * in which iwl_mvm_ref_sync continues successfully while we
1057          * configure the firmware to enter d0i3
1058          */
1059         if (iwl_mvm_ref_taken(mvm)) {
1060                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1061                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1062                 wake_up(&mvm->d0i3_exit_waitq);
1063                 return 1;
1064         }
1065
1066         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1067                                                    IEEE80211_IFACE_ITER_NORMAL,
1068                                                    iwl_mvm_enter_d0i3_iterator,
1069                                                    &d0i3_iter_data);
1070         if (d0i3_iter_data.vif_count == 1) {
1071                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1072                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1073         } else {
1074                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1075                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1076                 mvm->d0i3_offloading = false;
1077         }
1078
1079         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1080         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1081                                    sizeof(wowlan_config_cmd),
1082                                    &wowlan_config_cmd);
1083         if (ret)
1084                 return ret;
1085
1086         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1087                                     flags | CMD_MAKE_TRANS_IDLE,
1088                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1089 }
1090
1091 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1092                                        struct ieee80211_vif *vif)
1093 {
1094         struct iwl_mvm *mvm = _data;
1095         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1096
1097         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1098         if (vif->type != NL80211_IFTYPE_STATION ||
1099             !vif->bss_conf.assoc)
1100                 return;
1101
1102         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1103 }
1104
1105 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1106                                          struct ieee80211_vif *vif)
1107 {
1108         struct iwl_mvm *mvm = data;
1109         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1110
1111         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1112             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1113                 ieee80211_connection_loss(vif);
1114 }
1115
1116 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1117 {
1118         struct ieee80211_sta *sta = NULL;
1119         struct iwl_mvm_sta *mvm_ap_sta;
1120         int i;
1121         bool wake_queues = false;
1122
1123         lockdep_assert_held(&mvm->mutex);
1124
1125         spin_lock_bh(&mvm->d0i3_tx_lock);
1126
1127         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1128                 goto out;
1129
1130         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1131
1132         /* get the sta in order to update seq numbers and re-enqueue skbs */
1133         sta = rcu_dereference_protected(
1134                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1135                         lockdep_is_held(&mvm->mutex));
1136
1137         if (IS_ERR_OR_NULL(sta)) {
1138                 sta = NULL;
1139                 goto out;
1140         }
1141
1142         if (mvm->d0i3_offloading && qos_seq) {
1143                 /* update qos seq numbers if offloading was enabled */
1144                 mvm_ap_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1145                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1146                         u16 seq = le16_to_cpu(qos_seq[i]);
1147                         /* firmware stores last-used one, we store next one */
1148                         seq += 0x10;
1149                         mvm_ap_sta->tid_data[i].seq_number = seq;
1150                 }
1151         }
1152 out:
1153         /* re-enqueue (or drop) all packets */
1154         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1155                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1156
1157                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1158                         ieee80211_free_txskb(mvm->hw, skb);
1159
1160                 /* if the skb_queue is not empty, we need to wake queues */
1161                 wake_queues = true;
1162         }
1163         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1164         wake_up(&mvm->d0i3_exit_waitq);
1165         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1166         if (wake_queues)
1167                 ieee80211_wake_queues(mvm->hw);
1168
1169         spin_unlock_bh(&mvm->d0i3_tx_lock);
1170 }
1171
1172 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1173 {
1174         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1175         struct iwl_host_cmd get_status_cmd = {
1176                 .id = WOWLAN_GET_STATUSES,
1177                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1178         };
1179         struct iwl_wowlan_status *status;
1180         int ret;
1181         u32 disconnection_reasons, wakeup_reasons;
1182         __le16 *qos_seq = NULL;
1183
1184         mutex_lock(&mvm->mutex);
1185         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1186         if (ret)
1187                 goto out;
1188
1189         if (!get_status_cmd.resp_pkt)
1190                 goto out;
1191
1192         status = (void *)get_status_cmd.resp_pkt->data;
1193         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1194         qos_seq = status->qos_seq_ctr;
1195
1196         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1197
1198         disconnection_reasons =
1199                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1200                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1201         if (wakeup_reasons & disconnection_reasons)
1202                 ieee80211_iterate_active_interfaces(
1203                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1204                         iwl_mvm_d0i3_disconnect_iter, mvm);
1205
1206         iwl_free_resp(&get_status_cmd);
1207 out:
1208         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1209         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1210         mutex_unlock(&mvm->mutex);
1211 }
1212
1213 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1214 {
1215         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1216                     CMD_WAKE_UP_TRANS;
1217         int ret;
1218
1219         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1220
1221         mutex_lock(&mvm->d0i3_suspend_mutex);
1222         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1223                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1224                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1225                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1226                 return 0;
1227         }
1228         mutex_unlock(&mvm->d0i3_suspend_mutex);
1229
1230         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1231         if (ret)
1232                 goto out;
1233
1234         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1235                                                    IEEE80211_IFACE_ITER_NORMAL,
1236                                                    iwl_mvm_exit_d0i3_iterator,
1237                                                    mvm);
1238 out:
1239         schedule_work(&mvm->d0i3_exit_work);
1240         return ret;
1241 }
1242
1243 static int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1244 {
1245         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1246
1247         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1248         return _iwl_mvm_exit_d0i3(mvm);
1249 }
1250
1251 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1252                              struct napi_struct *napi,
1253                              struct net_device *napi_dev,
1254                              int (*poll)(struct napi_struct *, int),
1255                              int weight)
1256 {
1257         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1258
1259         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1260 }
1261
1262 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1263         .start = iwl_op_mode_mvm_start,
1264         .stop = iwl_op_mode_mvm_stop,
1265         .rx = iwl_mvm_rx_dispatch,
1266         .queue_full = iwl_mvm_stop_sw_queue,
1267         .queue_not_full = iwl_mvm_wake_sw_queue,
1268         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1269         .free_skb = iwl_mvm_free_skb,
1270         .nic_error = iwl_mvm_nic_error,
1271         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1272         .nic_config = iwl_mvm_nic_config,
1273         .enter_d0i3 = iwl_mvm_enter_d0i3,
1274         .exit_d0i3 = iwl_mvm_exit_d0i3,
1275         .napi_add = iwl_mvm_napi_add,
1276 };