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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
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  21  * along with this program; if not, write to the Free Software
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  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 - 2015 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
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  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,
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  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/module.h>
  66 #include <linux/vmalloc.h>
  67 #include <net/mac80211.h>
  68
  69 #include "iwl-notif-wait.h"
  70 #include "iwl-trans.h"
  71 #include "iwl-op-mode.h"
  72 #include "iwl-fw.h"
  73 #include "iwl-debug.h"
  74 #include "iwl-drv.h"
  75 #include "iwl-modparams.h"
  76 #include "mvm.h"
  77 #include "iwl-phy-db.h"
  78 #include "iwl-eeprom-parse.h"
  79 #include "iwl-csr.h"
  80 #include "iwl-io.h"
  81 #include "iwl-prph.h"
  82 #include "rs.h"
  83 #include "fw-api-scan.h"
  84 #include "time-event.h"
  85
  86 #define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"
  87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  88 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  89 MODULE_LICENSE("GPL");
  90
  91 static const struct iwl_op_mode_ops iwl_mvm_ops;
  92
  93 struct iwl_mvm_mod_params iwlmvm_mod_params = {
  94         .power_scheme = IWL_POWER_SCHEME_BPS,
  95         .tfd_q_hang_detect = true
  96         /* rest of fields are 0 by default */
  97 };
  98
  99 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
 100 MODULE_PARM_DESC(init_dbg,
 101                  "set to true to debug an ASSERT in INIT fw (default: false");
 102 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
 103 MODULE_PARM_DESC(power_scheme,
 104                  "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
 105 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
 106                    bool, S_IRUGO);
 107 MODULE_PARM_DESC(tfd_q_hang_detect,
 108                  "TFD queues hang detection (default: true");
 109
 110 /*
 111  * module init and exit functions
 112  */
 113 static int __init iwl_mvm_init(void)
 114 {
 115         int ret;
 116
 117         ret = iwl_mvm_rate_control_register();
 118         if (ret) {
 119                 pr_err("Unable to register rate control algorithm: %d\n", ret);
 120                 return ret;
 121         }
 122
 123         ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
 124
 125         if (ret) {
 126                 pr_err("Unable to register MVM op_mode: %d\n", ret);
 127                 iwl_mvm_rate_control_unregister();
 128         }
 129
 130         return ret;
 131 }
 132 module_init(iwl_mvm_init);
 133
 134 static void __exit iwl_mvm_exit(void)
 135 {
 136         iwl_opmode_deregister("iwlmvm");
 137         iwl_mvm_rate_control_unregister();
 138 }
 139 module_exit(iwl_mvm_exit);
 140
 141 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
 142 {
 143         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 144         u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
 145         u32 reg_val = 0;
 146         u32 phy_config = iwl_mvm_get_phy_config(mvm);
 147
 148         radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
 149                          FW_PHY_CFG_RADIO_TYPE_POS;
 150         radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
 151                          FW_PHY_CFG_RADIO_STEP_POS;
 152         radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
 153                          FW_PHY_CFG_RADIO_DASH_POS;
 154
 155         /* SKU control */
 156         reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
 157                                 CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
 158         reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
 159                                 CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
 160
 161         /* radio configuration */
 162         reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
 163         reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
 164         reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
 165
 166         WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
 167                  ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
 168
 169         /*
 170          * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
 171          * shouldn't be set to any non-zero value. The same is supposed to be
 172          * true of the other HW, but unsetting them (such as the 7260) causes
 173          * automatic tests to fail on seemingly unrelated errors. Need to
 174          * further investigate this, but for now we'll separate cases.
 175          */
 176         if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 177                 reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
 178
 179         iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
 180                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
 181                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
 182                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
 183                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
 184                                 CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
 185                                 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 186                                 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
 187                                 reg_val);
 188
 189         IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
 190                        radio_cfg_step, radio_cfg_dash);
 191
 192         /*
 193          * W/A : NIC is stuck in a reset state after Early PCIe power off
 194          * (PCIe power is lost before PERST# is asserted), causing ME FW
 195          * to lose ownership and not being able to obtain it back.
 196          */
 197         if (!mvm->trans->cfg->apmg_not_supported)
 198                 iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
 199                                        APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
 200                                        ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
 201 }
 202
 203 struct iwl_rx_handlers {
 204         u8 cmd_id;
 205         bool async;
 206         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 207 };
 208
 209 #define RX_HANDLER(_cmd_id, _fn, _async)        \
 210         { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
 211
 212 /*
 213  * Handlers for fw notifications
 214  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 215  * This list should be in order of frequency for performance purposes.
 216  *
 217  * The handler can be SYNC - this means that it will be called in the Rx path
 218  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 219  * only in this case!), it should be set as ASYNC. In that case, it will be
 220  * called from a worker with mvm->mutex held.
 221  */
 222 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 223         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 224         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 225         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 226
 227         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 228         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 229         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 230         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 231                    iwl_mvm_rx_ant_coupling_notif, true),
 232
 233         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 234         RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
 235
 236         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 237
 238         RX_HANDLER(SCAN_ITERATION_COMPLETE,
 239                    iwl_mvm_rx_lmac_scan_iter_complete_notif, false),
 240         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 241                    iwl_mvm_rx_lmac_scan_complete_notif, true),
 242         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_match_found,
 243                    false),
 244         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 245                    true),
 246         RX_HANDLER(SCAN_ITERATION_COMPLETE_UMAC,
 247                    iwl_mvm_rx_umac_scan_iter_complete_notif, false),
 248
 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         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 258
 259         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 260                    true),
 261         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 262
 263 };
 264 #undef RX_HANDLER
 265 #define CMD(x) [x] = #x
 266
 267 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 268         CMD(MVM_ALIVE),
 269         CMD(REPLY_ERROR),
 270         CMD(INIT_COMPLETE_NOTIF),
 271         CMD(PHY_CONTEXT_CMD),
 272         CMD(MGMT_MCAST_KEY),
 273         CMD(TX_CMD),
 274         CMD(TXPATH_FLUSH),
 275         CMD(SHARED_MEM_CFG),
 276         CMD(MAC_CONTEXT_CMD),
 277         CMD(TIME_EVENT_CMD),
 278         CMD(TIME_EVENT_NOTIFICATION),
 279         CMD(BINDING_CONTEXT_CMD),
 280         CMD(TIME_QUOTA_CMD),
 281         CMD(NON_QOS_TX_COUNTER_CMD),
 282         CMD(DC2DC_CONFIG_CMD),
 283         CMD(NVM_ACCESS_CMD),
 284         CMD(PHY_CONFIGURATION_CMD),
 285         CMD(CALIB_RES_NOTIF_PHY_DB),
 286         CMD(SET_CALIB_DEFAULT_CMD),
 287         CMD(ADD_STA_KEY),
 288         CMD(ADD_STA),
 289         CMD(REMOVE_STA),
 290         CMD(LQ_CMD),
 291         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 292         CMD(MATCH_FOUND_NOTIFICATION),
 293         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 294         CMD(SCAN_OFFLOAD_ABORT_CMD),
 295         CMD(HOT_SPOT_CMD),
 296         CMD(SCAN_OFFLOAD_COMPLETE),
 297         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 298         CMD(SCAN_ITERATION_COMPLETE),
 299         CMD(POWER_TABLE_CMD),
 300         CMD(WEP_KEY),
 301         CMD(REPLY_RX_PHY_CMD),
 302         CMD(REPLY_RX_MPDU_CMD),
 303         CMD(BEACON_NOTIFICATION),
 304         CMD(BEACON_TEMPLATE_CMD),
 305         CMD(STATISTICS_CMD),
 306         CMD(STATISTICS_NOTIFICATION),
 307         CMD(EOSP_NOTIFICATION),
 308         CMD(REDUCE_TX_POWER_CMD),
 309         CMD(TX_ANT_CONFIGURATION_CMD),
 310         CMD(D3_CONFIG_CMD),
 311         CMD(D0I3_END_CMD),
 312         CMD(PROT_OFFLOAD_CONFIG_CMD),
 313         CMD(OFFLOADS_QUERY_CMD),
 314         CMD(REMOTE_WAKE_CONFIG_CMD),
 315         CMD(WOWLAN_PATTERNS),
 316         CMD(WOWLAN_CONFIGURATION),
 317         CMD(WOWLAN_TSC_RSC_PARAM),
 318         CMD(WOWLAN_TKIP_PARAM),
 319         CMD(WOWLAN_KEK_KCK_MATERIAL),
 320         CMD(WOWLAN_GET_STATUSES),
 321         CMD(WOWLAN_TX_POWER_PER_DB),
 322         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 323         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 324         CMD(SCAN_OFFLOAD_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         CMD(SCAN_CFG_CMD),
 348         CMD(SCAN_REQ_UMAC),
 349         CMD(SCAN_ABORT_UMAC),
 350         CMD(SCAN_COMPLETE_UMAC),
 351         CMD(TDLS_CHANNEL_SWITCH_CMD),
 352         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 353         CMD(TDLS_CONFIG_CMD),
 354         CMD(MCC_UPDATE_CMD),
 355         CMD(SCAN_ITERATION_COMPLETE_UMAC),
 356 };
 357 #undef CMD
 358
 359 /* this forward declaration can avoid to export the function */
 360 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 361 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 362
 363 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 364 {
 365         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 366
 367         if (!pwr_tx_backoff)
 368                 return 0;
 369
 370         while (pwr_tx_backoff->pwr) {
 371                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 372                         return pwr_tx_backoff->backoff;
 373
 374                 pwr_tx_backoff++;
 375         }
 376
 377         return 0;
 378 }
 379
 380 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 381
 382 static struct iwl_op_mode *
 383 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 384                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 385 {
 386         struct ieee80211_hw *hw;
 387         struct iwl_op_mode *op_mode;
 388         struct iwl_mvm *mvm;
 389         struct iwl_trans_config trans_cfg = {};
 390         static const u8 no_reclaim_cmds[] = {
 391                 TX_CMD,
 392         };
 393         int err, scan_size;
 394         u32 min_backoff;
 395
 396         /*
 397          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 398          * index all over the driver - check that its value corresponds to the
 399          * array size.
 400          */
 401         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 402
 403         /********************************
 404          * 1. Allocating and configuring HW data
 405          ********************************/
 406         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 407                                 sizeof(struct iwl_mvm),
 408                                 &iwl_mvm_hw_ops);
 409         if (!hw)
 410                 return NULL;
 411
 412         if (cfg->max_rx_agg_size)
 413                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 414
 415         if (cfg->max_tx_agg_size)
 416                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 417
 418         op_mode = hw->priv;
 419         op_mode->ops = &iwl_mvm_ops;
 420
 421         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 422         mvm->dev = trans->dev;
 423         mvm->trans = trans;
 424         mvm->cfg = cfg;
 425         mvm->fw = fw;
 426         mvm->hw = hw;
 427
 428         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 429
 430         mvm->aux_queue = 15;
 431         mvm->first_agg_queue = 16;
 432         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 433         if (mvm->cfg->base_params->num_of_queues == 16) {
 434                 mvm->aux_queue = 11;
 435                 mvm->first_agg_queue = 12;
 436         }
 437         mvm->sf_state = SF_UNINIT;
 438         mvm->low_latency_agg_frame_limit = 6;
 439         mvm->cur_ucode = IWL_UCODE_INIT;
 440
 441         mutex_init(&mvm->mutex);
 442         mutex_init(&mvm->d0i3_suspend_mutex);
 443         spin_lock_init(&mvm->async_handlers_lock);
 444         INIT_LIST_HEAD(&mvm->time_event_list);
 445         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 446         INIT_LIST_HEAD(&mvm->async_handlers_list);
 447         spin_lock_init(&mvm->time_event_lock);
 448
 449         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 450         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 451         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 452         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 453         INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
 454         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
 455
 456         spin_lock_init(&mvm->d0i3_tx_lock);
 457         spin_lock_init(&mvm->refs_lock);
 458         skb_queue_head_init(&mvm->d0i3_tx);
 459         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 460
 461         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 462
 463         /*
 464          * Populate the state variables that the transport layer needs
 465          * to know about.
 466          */
 467         trans_cfg.op_mode = op_mode;
 468         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 469         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 470         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 471
 472         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 473                 trans_cfg.bc_table_dword = true;
 474
 475         trans_cfg.command_names = iwl_mvm_cmd_strings;
 476
 477         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 478         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 479         trans_cfg.scd_set_active = true;
 480
 481         trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
 482
 483         /* Set a short watchdog for the command queue */
 484         trans_cfg.cmd_q_wdg_timeout =
 485                 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
 486
 487         snprintf(mvm->hw->wiphy->fw_version,
 488                  sizeof(mvm->hw->wiphy->fw_version),
 489                  "%s", fw->fw_version);
 490
 491         /* Configure transport layer */
 492         iwl_trans_configure(mvm->trans, &trans_cfg);
 493
 494         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 495         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 496         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 497         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 498         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 499                sizeof(trans->dbg_conf_tlv));
 500         trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
 501
 502         /* set up notification wait support */
 503         iwl_notification_wait_init(&mvm->notif_wait);
 504
 505         /* Init phy db */
 506         mvm->phy_db = iwl_phy_db_init(trans);
 507         if (!mvm->phy_db) {
 508                 IWL_ERR(mvm, "Cannot init phy_db\n");
 509                 goto out_free;
 510         }
 511
 512         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 513                  mvm->cfg->name, mvm->trans->hw_rev);
 514
 515         min_backoff = calc_min_backoff(trans, cfg);
 516         iwl_mvm_tt_initialize(mvm, min_backoff);
 517
 518         if (iwlwifi_mod_params.nvm_file)
 519                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 520         else
 521                 IWL_DEBUG_EEPROM(mvm->trans->dev,
 522                                  "working without external nvm file\n");
 523
 524         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 525                  "not allowing power-up and not having nvm_file\n"))
 526                 goto out_free;
 527
 528         /*
 529          * Even if nvm exists in the nvm_file driver should read again the nvm
 530          * from the nic because there might be entries that exist in the OTP
 531          * and not in the file.
 532          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 533          */
 534         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 535                 err = iwl_nvm_init(mvm, false);
 536                 if (err)
 537                         goto out_free;
 538         } else {
 539                 err = iwl_trans_start_hw(mvm->trans);
 540                 if (err)
 541                         goto out_free;
 542
 543                 mutex_lock(&mvm->mutex);
 544                 err = iwl_run_init_mvm_ucode(mvm, true);
 545                 if (!err || !iwlmvm_mod_params.init_dbg)
 546                         iwl_trans_stop_device(trans);
 547                 mutex_unlock(&mvm->mutex);
 548                 /* returns 0 if successful, 1 if success but in rfkill */
 549                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 550                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 551                         goto out_free;
 552                 }
 553         }
 554
 555         scan_size = iwl_mvm_scan_size(mvm);
 556
 557         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 558         if (!mvm->scan_cmd)
 559                 goto out_free;
 560
 561         /* Set EBS as successful as long as not stated otherwise by the FW. */
 562         mvm->last_ebs_successful = true;
 563
 564         err = iwl_mvm_mac_setup_register(mvm);
 565         if (err)
 566                 goto out_free;
 567
 568         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 569         if (err)
 570                 goto out_unregister;
 571
 572         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 573
 574         /* rpm starts with a taken ref. only set the appropriate bit here. */
 575         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 576
 577         return op_mode;
 578
 579  out_unregister:
 580         ieee80211_unregister_hw(mvm->hw);
 581         iwl_mvm_leds_exit(mvm);
 582  out_free:
 583         iwl_phy_db_free(mvm->phy_db);
 584         kfree(mvm->scan_cmd);
 585         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 586                 iwl_trans_op_mode_leave(trans);
 587         ieee80211_free_hw(mvm->hw);
 588         return NULL;
 589 }
 590
 591 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 592 {
 593         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 594         int i;
 595
 596         iwl_mvm_leds_exit(mvm);
 597
 598         iwl_mvm_tt_exit(mvm);
 599
 600         ieee80211_unregister_hw(mvm->hw);
 601
 602         kfree(mvm->scan_cmd);
 603         kfree(mvm->mcast_filter_cmd);
 604         mvm->mcast_filter_cmd = NULL;
 605
 606 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 607         kfree(mvm->d3_resume_sram);
 608         if (mvm->nd_config) {
 609                 kfree(mvm->nd_config->match_sets);
 610                 kfree(mvm->nd_config);
 611                 mvm->nd_config = NULL;
 612         }
 613 #endif
 614
 615         iwl_trans_op_mode_leave(mvm->trans);
 616
 617         iwl_phy_db_free(mvm->phy_db);
 618         mvm->phy_db = NULL;
 619
 620         iwl_free_nvm_data(mvm->nvm_data);
 621         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 622                 kfree(mvm->nvm_sections[i].data);
 623
 624         ieee80211_free_hw(mvm->hw);
 625 }
 626
 627 struct iwl_async_handler_entry {
 628         struct list_head list;
 629         struct iwl_rx_cmd_buffer rxb;
 630         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 631 };
 632
 633 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 634 {
 635         struct iwl_async_handler_entry *entry, *tmp;
 636
 637         spin_lock_bh(&mvm->async_handlers_lock);
 638         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 639                 iwl_free_rxb(&entry->rxb);
 640                 list_del(&entry->list);
 641                 kfree(entry);
 642         }
 643         spin_unlock_bh(&mvm->async_handlers_lock);
 644 }
 645
 646 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 647 {
 648         struct iwl_mvm *mvm =
 649                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 650         struct iwl_async_handler_entry *entry, *tmp;
 651         struct list_head local_list;
 652
 653         INIT_LIST_HEAD(&local_list);
 654
 655         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 656         mutex_lock(&mvm->mutex);
 657
 658         /*
 659          * Sync with Rx path with a lock. Remove all the entries from this list,
 660          * add them to a local one (lock free), and then handle them.
 661          */
 662         spin_lock_bh(&mvm->async_handlers_lock);
 663         list_splice_init(&mvm->async_handlers_list, &local_list);
 664         spin_unlock_bh(&mvm->async_handlers_lock);
 665
 666         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 667                 entry->fn(mvm, &entry->rxb);
 668                 iwl_free_rxb(&entry->rxb);
 669                 list_del(&entry->list);
 670                 kfree(entry);
 671         }
 672         mutex_unlock(&mvm->mutex);
 673 }
 674
 675 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
 676                                             struct iwl_rx_packet *pkt)
 677 {
 678         struct iwl_fw_dbg_trigger_tlv *trig;
 679         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
 680         int i;
 681
 682         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
 683                 return;
 684
 685         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
 686         cmds_trig = (void *)trig->data;
 687
 688         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 689                 return;
 690
 691         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
 692                 /* don't collect on CMD 0 */
 693                 if (!cmds_trig->cmds[i].cmd_id)
 694                         break;
 695
 696                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd)
 697                         continue;
 698
 699                 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
 700                                             "CMD 0x%02x received",
 701                                             pkt->hdr.cmd);
 702                 break;
 703         }
 704 }
 705
 706 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 707                                struct iwl_rx_cmd_buffer *rxb,
 708                                struct iwl_device_cmd *cmd)
 709 {
 710         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 711         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 712         u8 i;
 713
 714         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD)) {
 715                 iwl_mvm_rx_rx_mpdu(mvm, rxb);
 716                 return 0;
 717         }
 718
 719         iwl_mvm_rx_check_trigger(mvm, pkt);
 720
 721         /*
 722          * Do the notification wait before RX handlers so
 723          * even if the RX handler consumes the RXB we have
 724          * access to it in the notification wait entry.
 725          */
 726         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 727
 728         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 729                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 730                 struct iwl_async_handler_entry *entry;
 731
 732                 if (rx_h->cmd_id != pkt->hdr.cmd)
 733                         continue;
 734
 735                 if (!rx_h->async) {
 736                         rx_h->fn(mvm, rxb);
 737                         return 0;
 738                 }
 739
 740                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 741                 /* we can't do much... */
 742                 if (!entry)
 743                         return 0;
 744
 745                 entry->rxb._page = rxb_steal_page(rxb);
 746                 entry->rxb._offset = rxb->_offset;
 747                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 748                 entry->fn = rx_h->fn;
 749                 spin_lock(&mvm->async_handlers_lock);
 750                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 751                 spin_unlock(&mvm->async_handlers_lock);
 752                 schedule_work(&mvm->async_handlers_wk);
 753                 break;
 754         }
 755
 756         return 0;
 757 }
 758
 759 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 760 {
 761         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 762         int mq = mvm->queue_to_mac80211[queue];
 763
 764         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 765                 return;
 766
 767         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 768                 IWL_DEBUG_TX_QUEUES(mvm,
 769                                     "queue %d (mac80211 %d) already stopped\n",
 770                                     queue, mq);
 771                 return;
 772         }
 773
 774         ieee80211_stop_queue(mvm->hw, mq);
 775 }
 776
 777 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 778 {
 779         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 780         int mq = mvm->queue_to_mac80211[queue];
 781
 782         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 783                 return;
 784
 785         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 786                 IWL_DEBUG_TX_QUEUES(mvm,
 787                                     "queue %d (mac80211 %d) still stopped\n",
 788                                     queue, mq);
 789                 return;
 790         }
 791
 792         ieee80211_wake_queue(mvm->hw, mq);
 793 }
 794
 795 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 796 {
 797         if (state)
 798                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 799         else
 800                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 801
 802         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 803 }
 804
 805 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 806 {
 807         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 808         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 809
 810         if (state)
 811                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 812         else
 813                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 814
 815         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 816
 817         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 818         if (calibrating)
 819                 iwl_abort_notification_waits(&mvm->notif_wait);
 820
 821         /*
 822          * Stop the device if we run OPERATIONAL firmware or if we are in the
 823          * middle of the calibrations.
 824          */
 825         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 826 }
 827
 828 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 829 {
 830         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 831         struct ieee80211_tx_info *info;
 832
 833         info = IEEE80211_SKB_CB(skb);
 834         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 835         ieee80211_free_txskb(mvm->hw, skb);
 836 }
 837
 838 struct iwl_mvm_reprobe {
 839         struct device *dev;
 840         struct work_struct work;
 841 };
 842
 843 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 844 {
 845         struct iwl_mvm_reprobe *reprobe;
 846
 847         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 848         if (device_reprobe(reprobe->dev))
 849                 dev_err(reprobe->dev, "reprobe failed!\n");
 850         kfree(reprobe);
 851         module_put(THIS_MODULE);
 852 }
 853
 854 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 855 {
 856         struct iwl_mvm *mvm =
 857                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 858
 859         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 860                 return;
 861
 862         mutex_lock(&mvm->mutex);
 863
 864         /* stop recording */
 865         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
 866                 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
 867         } else {
 868                 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
 869                 /* wait before we collect the data till the DBGC stop */
 870                 udelay(100);
 871         }
 872
 873         iwl_mvm_fw_error_dump(mvm);
 874
 875         /* start recording again if the firmware is not crashed */
 876         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 877                      mvm->fw->dbg_dest_tlv &&
 878                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 879
 880         mutex_unlock(&mvm->mutex);
 881
 882         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 883 }
 884
 885 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 886 {
 887         iwl_abort_notification_waits(&mvm->notif_wait);
 888
 889         /*
 890          * This is a bit racy, but worst case we tell mac80211 about
 891          * a stopped/aborted scan when that was already done which
 892          * is not a problem. It is necessary to abort any os scan
 893          * here because mac80211 requires having the scan cleared
 894          * before restarting.
 895          * We'll reset the scan_status to NONE in restart cleanup in
 896          * the next start() call from mac80211. If restart isn't called
 897          * (no fw restart) scan status will stay busy.
 898          */
 899         iwl_mvm_report_scan_aborted(mvm);
 900
 901         /*
 902          * If we're restarting already, don't cycle restarts.
 903          * If INIT fw asserted, it will likely fail again.
 904          * If WoWLAN fw asserted, don't restart either, mac80211
 905          * can't recover this since we're already half suspended.
 906          */
 907         if (!mvm->restart_fw && fw_error) {
 908                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
 909         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 910                                     &mvm->status)) {
 911                 struct iwl_mvm_reprobe *reprobe;
 912
 913                 IWL_ERR(mvm,
 914                         "Firmware error during reconfiguration - reprobe!\n");
 915
 916                 /*
 917                  * get a module reference to avoid doing this while unloading
 918                  * anyway and to avoid scheduling a work with code that's
 919                  * being removed.
 920                  */
 921                 if (!try_module_get(THIS_MODULE)) {
 922                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 923                         return;
 924                 }
 925
 926                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 927                 if (!reprobe) {
 928                         module_put(THIS_MODULE);
 929                         return;
 930                 }
 931                 reprobe->dev = mvm->trans->dev;
 932                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 933                 schedule_work(&reprobe->work);
 934         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 935                 /* don't let the transport/FW power down */
 936                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 937
 938                 if (fw_error && mvm->restart_fw > 0)
 939                         mvm->restart_fw--;
 940                 ieee80211_restart_hw(mvm->hw);
 941         }
 942 }
 943
 944 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 945 {
 946         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 947
 948         iwl_mvm_dump_nic_error_log(mvm);
 949
 950         iwl_mvm_nic_restart(mvm, true);
 951 }
 952
 953 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 954 {
 955         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 956
 957         WARN_ON(1);
 958         iwl_mvm_nic_restart(mvm, true);
 959 }
 960
 961 struct iwl_d0i3_iter_data {
 962         struct iwl_mvm *mvm;
 963         u8 ap_sta_id;
 964         u8 vif_count;
 965         u8 offloading_tid;
 966         bool disable_offloading;
 967 };
 968
 969 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 970                                         struct ieee80211_vif *vif,
 971                                         struct iwl_d0i3_iter_data *iter_data)
 972 {
 973         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 974         struct ieee80211_sta *ap_sta;
 975         struct iwl_mvm_sta *mvmsta;
 976         u32 available_tids = 0;
 977         u8 tid;
 978
 979         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 980                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 981                 return false;
 982
 983         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 984         if (IS_ERR_OR_NULL(ap_sta))
 985                 return false;
 986
 987         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 988         spin_lock_bh(&mvmsta->lock);
 989         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 990                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 991
 992                 /*
 993                  * in case of pending tx packets, don't use this tid
 994                  * for offloading in order to prevent reuse of the same
 995                  * qos seq counters.
 996                  */
 997                 if (iwl_mvm_tid_queued(tid_data))
 998                         continue;
 999
1000                 if (tid_data->state != IWL_AGG_OFF)
1001                         continue;
1002
1003                 available_tids |= BIT(tid);
1004         }
1005         spin_unlock_bh(&mvmsta->lock);
1006
1007         /*
1008          * disallow protocol offloading if we have no available tid
1009          * (with no pending frames and no active aggregation,
1010          * as we don't handle "holes" properly - the scheduler needs the
1011          * frame's seq number and TFD index to match)
1012          */
1013         if (!available_tids)
1014                 return true;
1015
1016         /* for simplicity, just use the first available tid */
1017         iter_data->offloading_tid = ffs(available_tids) - 1;
1018         return false;
1019 }
1020
1021 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1022                                         struct ieee80211_vif *vif)
1023 {
1024         struct iwl_d0i3_iter_data *data = _data;
1025         struct iwl_mvm *mvm = data->mvm;
1026         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1027         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1028
1029         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1030         if (vif->type != NL80211_IFTYPE_STATION ||
1031             !vif->bss_conf.assoc)
1032                 return;
1033
1034         /*
1035          * in case of pending tx packets or active aggregations,
1036          * avoid offloading features in order to prevent reuse of
1037          * the same qos seq counters.
1038          */
1039         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1040                 data->disable_offloading = true;
1041
1042         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1043         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1044
1045         /*
1046          * on init/association, mvm already configures POWER_TABLE_CMD
1047          * and REPLY_MCAST_FILTER_CMD, so currently don't
1048          * reconfigure them (we might want to use different
1049          * params later on, though).
1050          */
1051         data->ap_sta_id = mvmvif->ap_sta_id;
1052         data->vif_count++;
1053 }
1054
1055 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1056                                     struct iwl_wowlan_config_cmd *cmd,
1057                                     struct iwl_d0i3_iter_data *iter_data)
1058 {
1059         struct ieee80211_sta *ap_sta;
1060         struct iwl_mvm_sta *mvm_ap_sta;
1061
1062         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1063                 return;
1064
1065         rcu_read_lock();
1066
1067         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1068         if (IS_ERR_OR_NULL(ap_sta))
1069                 goto out;
1070
1071         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1072         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1073         cmd->offloading_tid = iter_data->offloading_tid;
1074
1075         /*
1076          * The d0i3 uCode takes care of the nonqos counters,
1077          * so configure only the qos seq ones.
1078          */
1079         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1080 out:
1081         rcu_read_unlock();
1082 }
1083
1084 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1085 {
1086         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1087         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1088         int ret;
1089         struct iwl_d0i3_iter_data d0i3_iter_data = {
1090                 .mvm = mvm,
1091         };
1092         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1093                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1094                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1095                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1096                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1097         };
1098         struct iwl_d3_manager_config d3_cfg_cmd = {
1099                 .min_sleep_time = cpu_to_le32(1000),
1100                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1101         };
1102
1103         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1104
1105         /* make sure we have no running tx while configuring the qos */
1106         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1107         synchronize_net();
1108
1109         /*
1110          * iwl_mvm_ref_sync takes a reference before checking the flag.
1111          * so by checking there is no held reference we prevent a state
1112          * in which iwl_mvm_ref_sync continues successfully while we
1113          * configure the firmware to enter d0i3
1114          */
1115         if (iwl_mvm_ref_taken(mvm)) {
1116                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1117                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1118                 wake_up(&mvm->d0i3_exit_waitq);
1119                 return 1;
1120         }
1121
1122         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1123                                                    IEEE80211_IFACE_ITER_NORMAL,
1124                                                    iwl_mvm_enter_d0i3_iterator,
1125                                                    &d0i3_iter_data);
1126         if (d0i3_iter_data.vif_count == 1) {
1127                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1128                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1129         } else {
1130                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1131                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1132                 mvm->d0i3_offloading = false;
1133         }
1134
1135         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1136         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1137                                    sizeof(wowlan_config_cmd),
1138                                    &wowlan_config_cmd);
1139         if (ret)
1140                 return ret;
1141
1142         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1143                                     flags | CMD_MAKE_TRANS_IDLE,
1144                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1145 }
1146
1147 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1148                                        struct ieee80211_vif *vif)
1149 {
1150         struct iwl_mvm *mvm = _data;
1151         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1152
1153         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1154         if (vif->type != NL80211_IFTYPE_STATION ||
1155             !vif->bss_conf.assoc)
1156                 return;
1157
1158         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1159 }
1160
1161 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1162                                          struct ieee80211_vif *vif)
1163 {
1164         struct iwl_mvm *mvm = data;
1165         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1166
1167         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1168             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1169                 iwl_mvm_connection_loss(mvm, vif, "D0i3");
1170 }
1171
1172 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1173 {
1174         struct ieee80211_sta *sta = NULL;
1175         struct iwl_mvm_sta *mvm_ap_sta;
1176         int i;
1177         bool wake_queues = false;
1178
1179         lockdep_assert_held(&mvm->mutex);
1180
1181         spin_lock_bh(&mvm->d0i3_tx_lock);
1182
1183         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1184                 goto out;
1185
1186         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1187
1188         /* get the sta in order to update seq numbers and re-enqueue skbs */
1189         sta = rcu_dereference_protected(
1190                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1191                         lockdep_is_held(&mvm->mutex));
1192
1193         if (IS_ERR_OR_NULL(sta)) {
1194                 sta = NULL;
1195                 goto out;
1196         }
1197
1198         if (mvm->d0i3_offloading && qos_seq) {
1199                 /* update qos seq numbers if offloading was enabled */
1200                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1201                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1202                         u16 seq = le16_to_cpu(qos_seq[i]);
1203                         /* firmware stores last-used one, we store next one */
1204                         seq += 0x10;
1205                         mvm_ap_sta->tid_data[i].seq_number = seq;
1206                 }
1207         }
1208 out:
1209         /* re-enqueue (or drop) all packets */
1210         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1211                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1212
1213                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1214                         ieee80211_free_txskb(mvm->hw, skb);
1215
1216                 /* if the skb_queue is not empty, we need to wake queues */
1217                 wake_queues = true;
1218         }
1219         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1220         wake_up(&mvm->d0i3_exit_waitq);
1221         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1222         if (wake_queues)
1223                 ieee80211_wake_queues(mvm->hw);
1224
1225         spin_unlock_bh(&mvm->d0i3_tx_lock);
1226 }
1227
1228 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1229 {
1230         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1231         struct iwl_host_cmd get_status_cmd = {
1232                 .id = WOWLAN_GET_STATUSES,
1233                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1234         };
1235         struct iwl_wowlan_status *status;
1236         int ret;
1237         u32 disconnection_reasons, wakeup_reasons;
1238         __le16 *qos_seq = NULL;
1239
1240         mutex_lock(&mvm->mutex);
1241         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1242         if (ret)
1243                 goto out;
1244
1245         if (!get_status_cmd.resp_pkt)
1246                 goto out;
1247
1248         status = (void *)get_status_cmd.resp_pkt->data;
1249         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1250         qos_seq = status->qos_seq_ctr;
1251
1252         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1253
1254         disconnection_reasons =
1255                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1256                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1257         if (wakeup_reasons & disconnection_reasons)
1258                 ieee80211_iterate_active_interfaces(
1259                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1260                         iwl_mvm_d0i3_disconnect_iter, mvm);
1261 out:
1262         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1263
1264         /* qos_seq might point inside resp_pkt, so free it only now */
1265         if (get_status_cmd.resp_pkt)
1266                 iwl_free_resp(&get_status_cmd);
1267
1268         /* the FW might have updated the regdomain */
1269         iwl_mvm_update_changed_regdom(mvm);
1270
1271         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1272         mutex_unlock(&mvm->mutex);
1273 }
1274
1275 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1276 {
1277         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1278                     CMD_WAKE_UP_TRANS;
1279         int ret;
1280
1281         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1282
1283         mutex_lock(&mvm->d0i3_suspend_mutex);
1284         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1285                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1286                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1287                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1288                 return 0;
1289         }
1290         mutex_unlock(&mvm->d0i3_suspend_mutex);
1291
1292         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1293         if (ret)
1294                 goto out;
1295
1296         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1297                                                    IEEE80211_IFACE_ITER_NORMAL,
1298                                                    iwl_mvm_exit_d0i3_iterator,
1299                                                    mvm);
1300 out:
1301         schedule_work(&mvm->d0i3_exit_work);
1302         return ret;
1303 }
1304
1305 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1306 {
1307         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1308
1309         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1310         return _iwl_mvm_exit_d0i3(mvm);
1311 }
1312
1313 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1314                              struct napi_struct *napi,
1315                              struct net_device *napi_dev,
1316                              int (*poll)(struct napi_struct *, int),
1317                              int weight)
1318 {
1319         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1320
1321         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1322 }
1323
1324 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1325         .start = iwl_op_mode_mvm_start,
1326         .stop = iwl_op_mode_mvm_stop,
1327         .rx = iwl_mvm_rx_dispatch,
1328         .queue_full = iwl_mvm_stop_sw_queue,
1329         .queue_not_full = iwl_mvm_wake_sw_queue,
1330         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1331         .free_skb = iwl_mvm_free_skb,
1332         .nic_error = iwl_mvm_nic_error,
1333         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1334         .nic_config = iwl_mvm_nic_config,
1335         .enter_d0i3 = iwl_mvm_enter_d0i3,
1336         .exit_d0i3 = iwl_mvm_exit_d0i3,
1337         .napi_add = iwl_mvm_napi_add,
1338 };