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 void iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 707                                 struct iwl_rx_cmd_buffer *rxb)
 708 {
 709         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 710         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 711         u8 i;
 712
 713         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD)) {
 714                 iwl_mvm_rx_rx_mpdu(mvm, rxb);
 715                 return;
 716         }
 717
 718         iwl_mvm_rx_check_trigger(mvm, pkt);
 719
 720         /*
 721          * Do the notification wait before RX handlers so
 722          * even if the RX handler consumes the RXB we have
 723          * access to it in the notification wait entry.
 724          */
 725         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 726
 727         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 728                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 729                 struct iwl_async_handler_entry *entry;
 730
 731                 if (rx_h->cmd_id != pkt->hdr.cmd)
 732                         continue;
 733
 734                 if (!rx_h->async) {
 735                         rx_h->fn(mvm, rxb);
 736                         return;
 737                 }
 738
 739                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 740                 /* we can't do much... */
 741                 if (!entry)
 742                         return;
 743
 744                 entry->rxb._page = rxb_steal_page(rxb);
 745                 entry->rxb._offset = rxb->_offset;
 746                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 747                 entry->fn = rx_h->fn;
 748                 spin_lock(&mvm->async_handlers_lock);
 749                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 750                 spin_unlock(&mvm->async_handlers_lock);
 751                 schedule_work(&mvm->async_handlers_wk);
 752                 break;
 753         }
 754 }
 755
 756 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 757 {
 758         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 759         int mq = mvm->queue_to_mac80211[queue];
 760
 761         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 762                 return;
 763
 764         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 765                 IWL_DEBUG_TX_QUEUES(mvm,
 766                                     "queue %d (mac80211 %d) already stopped\n",
 767                                     queue, mq);
 768                 return;
 769         }
 770
 771         ieee80211_stop_queue(mvm->hw, mq);
 772 }
 773
 774 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 775 {
 776         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 777         int mq = mvm->queue_to_mac80211[queue];
 778
 779         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 780                 return;
 781
 782         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 783                 IWL_DEBUG_TX_QUEUES(mvm,
 784                                     "queue %d (mac80211 %d) still stopped\n",
 785                                     queue, mq);
 786                 return;
 787         }
 788
 789         ieee80211_wake_queue(mvm->hw, mq);
 790 }
 791
 792 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 793 {
 794         if (state)
 795                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 796         else
 797                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 798
 799         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 800 }
 801
 802 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 803 {
 804         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 805         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 806
 807         if (state)
 808                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 809         else
 810                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 811
 812         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 813
 814         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 815         if (calibrating)
 816                 iwl_abort_notification_waits(&mvm->notif_wait);
 817
 818         /*
 819          * Stop the device if we run OPERATIONAL firmware or if we are in the
 820          * middle of the calibrations.
 821          */
 822         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 823 }
 824
 825 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 826 {
 827         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 828         struct ieee80211_tx_info *info;
 829
 830         info = IEEE80211_SKB_CB(skb);
 831         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 832         ieee80211_free_txskb(mvm->hw, skb);
 833 }
 834
 835 struct iwl_mvm_reprobe {
 836         struct device *dev;
 837         struct work_struct work;
 838 };
 839
 840 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 841 {
 842         struct iwl_mvm_reprobe *reprobe;
 843
 844         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 845         if (device_reprobe(reprobe->dev))
 846                 dev_err(reprobe->dev, "reprobe failed!\n");
 847         kfree(reprobe);
 848         module_put(THIS_MODULE);
 849 }
 850
 851 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 852 {
 853         struct iwl_mvm *mvm =
 854                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 855
 856         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 857                 return;
 858
 859         mutex_lock(&mvm->mutex);
 860
 861         /* stop recording */
 862         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
 863                 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
 864         } else {
 865                 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
 866                 /* wait before we collect the data till the DBGC stop */
 867                 udelay(100);
 868         }
 869
 870         iwl_mvm_fw_error_dump(mvm);
 871
 872         /* start recording again if the firmware is not crashed */
 873         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 874                      mvm->fw->dbg_dest_tlv &&
 875                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 876
 877         mutex_unlock(&mvm->mutex);
 878
 879         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 880 }
 881
 882 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 883 {
 884         iwl_abort_notification_waits(&mvm->notif_wait);
 885
 886         /*
 887          * This is a bit racy, but worst case we tell mac80211 about
 888          * a stopped/aborted scan when that was already done which
 889          * is not a problem. It is necessary to abort any os scan
 890          * here because mac80211 requires having the scan cleared
 891          * before restarting.
 892          * We'll reset the scan_status to NONE in restart cleanup in
 893          * the next start() call from mac80211. If restart isn't called
 894          * (no fw restart) scan status will stay busy.
 895          */
 896         iwl_mvm_report_scan_aborted(mvm);
 897
 898         /*
 899          * If we're restarting already, don't cycle restarts.
 900          * If INIT fw asserted, it will likely fail again.
 901          * If WoWLAN fw asserted, don't restart either, mac80211
 902          * can't recover this since we're already half suspended.
 903          */
 904         if (!mvm->restart_fw && fw_error) {
 905                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
 906         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 907                                     &mvm->status)) {
 908                 struct iwl_mvm_reprobe *reprobe;
 909
 910                 IWL_ERR(mvm,
 911                         "Firmware error during reconfiguration - reprobe!\n");
 912
 913                 /*
 914                  * get a module reference to avoid doing this while unloading
 915                  * anyway and to avoid scheduling a work with code that's
 916                  * being removed.
 917                  */
 918                 if (!try_module_get(THIS_MODULE)) {
 919                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 920                         return;
 921                 }
 922
 923                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 924                 if (!reprobe) {
 925                         module_put(THIS_MODULE);
 926                         return;
 927                 }
 928                 reprobe->dev = mvm->trans->dev;
 929                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 930                 schedule_work(&reprobe->work);
 931         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 932                 /* don't let the transport/FW power down */
 933                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 934
 935                 if (fw_error && mvm->restart_fw > 0)
 936                         mvm->restart_fw--;
 937                 ieee80211_restart_hw(mvm->hw);
 938         }
 939 }
 940
 941 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 942 {
 943         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 944
 945         iwl_mvm_dump_nic_error_log(mvm);
 946
 947         iwl_mvm_nic_restart(mvm, true);
 948 }
 949
 950 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 951 {
 952         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 953
 954         WARN_ON(1);
 955         iwl_mvm_nic_restart(mvm, true);
 956 }
 957
 958 struct iwl_d0i3_iter_data {
 959         struct iwl_mvm *mvm;
 960         u8 ap_sta_id;
 961         u8 vif_count;
 962         u8 offloading_tid;
 963         bool disable_offloading;
 964 };
 965
 966 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 967                                         struct ieee80211_vif *vif,
 968                                         struct iwl_d0i3_iter_data *iter_data)
 969 {
 970         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 971         struct ieee80211_sta *ap_sta;
 972         struct iwl_mvm_sta *mvmsta;
 973         u32 available_tids = 0;
 974         u8 tid;
 975
 976         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 977                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 978                 return false;
 979
 980         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 981         if (IS_ERR_OR_NULL(ap_sta))
 982                 return false;
 983
 984         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 985         spin_lock_bh(&mvmsta->lock);
 986         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
 987                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 988
 989                 /*
 990                  * in case of pending tx packets, don't use this tid
 991                  * for offloading in order to prevent reuse of the same
 992                  * qos seq counters.
 993                  */
 994                 if (iwl_mvm_tid_queued(tid_data))
 995                         continue;
 996
 997                 if (tid_data->state != IWL_AGG_OFF)
 998                         continue;
 999
1000                 available_tids |= BIT(tid);
1001         }
1002         spin_unlock_bh(&mvmsta->lock);
1003
1004         /*
1005          * disallow protocol offloading if we have no available tid
1006          * (with no pending frames and no active aggregation,
1007          * as we don't handle "holes" properly - the scheduler needs the
1008          * frame's seq number and TFD index to match)
1009          */
1010         if (!available_tids)
1011                 return true;
1012
1013         /* for simplicity, just use the first available tid */
1014         iter_data->offloading_tid = ffs(available_tids) - 1;
1015         return false;
1016 }
1017
1018 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1019                                         struct ieee80211_vif *vif)
1020 {
1021         struct iwl_d0i3_iter_data *data = _data;
1022         struct iwl_mvm *mvm = data->mvm;
1023         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1024         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1025
1026         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1027         if (vif->type != NL80211_IFTYPE_STATION ||
1028             !vif->bss_conf.assoc)
1029                 return;
1030
1031         /*
1032          * in case of pending tx packets or active aggregations,
1033          * avoid offloading features in order to prevent reuse of
1034          * the same qos seq counters.
1035          */
1036         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1037                 data->disable_offloading = true;
1038
1039         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1040         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1041
1042         /*
1043          * on init/association, mvm already configures POWER_TABLE_CMD
1044          * and REPLY_MCAST_FILTER_CMD, so currently don't
1045          * reconfigure them (we might want to use different
1046          * params later on, though).
1047          */
1048         data->ap_sta_id = mvmvif->ap_sta_id;
1049         data->vif_count++;
1050 }
1051
1052 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1053                                     struct iwl_wowlan_config_cmd *cmd,
1054                                     struct iwl_d0i3_iter_data *iter_data)
1055 {
1056         struct ieee80211_sta *ap_sta;
1057         struct iwl_mvm_sta *mvm_ap_sta;
1058
1059         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1060                 return;
1061
1062         rcu_read_lock();
1063
1064         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1065         if (IS_ERR_OR_NULL(ap_sta))
1066                 goto out;
1067
1068         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1069         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1070         cmd->offloading_tid = iter_data->offloading_tid;
1071
1072         /*
1073          * The d0i3 uCode takes care of the nonqos counters,
1074          * so configure only the qos seq ones.
1075          */
1076         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1077 out:
1078         rcu_read_unlock();
1079 }
1080
1081 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1082 {
1083         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1084         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1085         int ret;
1086         struct iwl_d0i3_iter_data d0i3_iter_data = {
1087                 .mvm = mvm,
1088         };
1089         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1090                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1091                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1092                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1093                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1094         };
1095         struct iwl_d3_manager_config d3_cfg_cmd = {
1096                 .min_sleep_time = cpu_to_le32(1000),
1097                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1098         };
1099
1100         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1101
1102         /* make sure we have no running tx while configuring the qos */
1103         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1104         synchronize_net();
1105
1106         /*
1107          * iwl_mvm_ref_sync takes a reference before checking the flag.
1108          * so by checking there is no held reference we prevent a state
1109          * in which iwl_mvm_ref_sync continues successfully while we
1110          * configure the firmware to enter d0i3
1111          */
1112         if (iwl_mvm_ref_taken(mvm)) {
1113                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1114                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1115                 wake_up(&mvm->d0i3_exit_waitq);
1116                 return 1;
1117         }
1118
1119         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1120                                                    IEEE80211_IFACE_ITER_NORMAL,
1121                                                    iwl_mvm_enter_d0i3_iterator,
1122                                                    &d0i3_iter_data);
1123         if (d0i3_iter_data.vif_count == 1) {
1124                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1125                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1126         } else {
1127                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1128                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1129                 mvm->d0i3_offloading = false;
1130         }
1131
1132         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1133         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1134                                    sizeof(wowlan_config_cmd),
1135                                    &wowlan_config_cmd);
1136         if (ret)
1137                 return ret;
1138
1139         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1140                                     flags | CMD_MAKE_TRANS_IDLE,
1141                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1142 }
1143
1144 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1145                                        struct ieee80211_vif *vif)
1146 {
1147         struct iwl_mvm *mvm = _data;
1148         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1149
1150         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1151         if (vif->type != NL80211_IFTYPE_STATION ||
1152             !vif->bss_conf.assoc)
1153                 return;
1154
1155         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1156 }
1157
1158 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1159                                          struct ieee80211_vif *vif)
1160 {
1161         struct iwl_mvm *mvm = data;
1162         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1163
1164         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1165             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1166                 iwl_mvm_connection_loss(mvm, vif, "D0i3");
1167 }
1168
1169 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1170 {
1171         struct ieee80211_sta *sta = NULL;
1172         struct iwl_mvm_sta *mvm_ap_sta;
1173         int i;
1174         bool wake_queues = false;
1175
1176         lockdep_assert_held(&mvm->mutex);
1177
1178         spin_lock_bh(&mvm->d0i3_tx_lock);
1179
1180         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1181                 goto out;
1182
1183         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1184
1185         /* get the sta in order to update seq numbers and re-enqueue skbs */
1186         sta = rcu_dereference_protected(
1187                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1188                         lockdep_is_held(&mvm->mutex));
1189
1190         if (IS_ERR_OR_NULL(sta)) {
1191                 sta = NULL;
1192                 goto out;
1193         }
1194
1195         if (mvm->d0i3_offloading && qos_seq) {
1196                 /* update qos seq numbers if offloading was enabled */
1197                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1198                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1199                         u16 seq = le16_to_cpu(qos_seq[i]);
1200                         /* firmware stores last-used one, we store next one */
1201                         seq += 0x10;
1202                         mvm_ap_sta->tid_data[i].seq_number = seq;
1203                 }
1204         }
1205 out:
1206         /* re-enqueue (or drop) all packets */
1207         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1208                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1209
1210                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1211                         ieee80211_free_txskb(mvm->hw, skb);
1212
1213                 /* if the skb_queue is not empty, we need to wake queues */
1214                 wake_queues = true;
1215         }
1216         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1217         wake_up(&mvm->d0i3_exit_waitq);
1218         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1219         if (wake_queues)
1220                 ieee80211_wake_queues(mvm->hw);
1221
1222         spin_unlock_bh(&mvm->d0i3_tx_lock);
1223 }
1224
1225 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1226 {
1227         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1228         struct iwl_host_cmd get_status_cmd = {
1229                 .id = WOWLAN_GET_STATUSES,
1230                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1231         };
1232         struct iwl_wowlan_status *status;
1233         int ret;
1234         u32 disconnection_reasons, wakeup_reasons;
1235         __le16 *qos_seq = NULL;
1236
1237         mutex_lock(&mvm->mutex);
1238         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1239         if (ret)
1240                 goto out;
1241
1242         if (!get_status_cmd.resp_pkt)
1243                 goto out;
1244
1245         status = (void *)get_status_cmd.resp_pkt->data;
1246         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1247         qos_seq = status->qos_seq_ctr;
1248
1249         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1250
1251         disconnection_reasons =
1252                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1253                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1254         if (wakeup_reasons & disconnection_reasons)
1255                 ieee80211_iterate_active_interfaces(
1256                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1257                         iwl_mvm_d0i3_disconnect_iter, mvm);
1258 out:
1259         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1260
1261         /* qos_seq might point inside resp_pkt, so free it only now */
1262         if (get_status_cmd.resp_pkt)
1263                 iwl_free_resp(&get_status_cmd);
1264
1265         /* the FW might have updated the regdomain */
1266         iwl_mvm_update_changed_regdom(mvm);
1267
1268         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1269         mutex_unlock(&mvm->mutex);
1270 }
1271
1272 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1273 {
1274         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1275                     CMD_WAKE_UP_TRANS;
1276         int ret;
1277
1278         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1279
1280         mutex_lock(&mvm->d0i3_suspend_mutex);
1281         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1282                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1283                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1284                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1285                 return 0;
1286         }
1287         mutex_unlock(&mvm->d0i3_suspend_mutex);
1288
1289         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1290         if (ret)
1291                 goto out;
1292
1293         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1294                                                    IEEE80211_IFACE_ITER_NORMAL,
1295                                                    iwl_mvm_exit_d0i3_iterator,
1296                                                    mvm);
1297 out:
1298         schedule_work(&mvm->d0i3_exit_work);
1299         return ret;
1300 }
1301
1302 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1303 {
1304         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1305
1306         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1307         return _iwl_mvm_exit_d0i3(mvm);
1308 }
1309
1310 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1311                              struct napi_struct *napi,
1312                              struct net_device *napi_dev,
1313                              int (*poll)(struct napi_struct *, int),
1314                              int weight)
1315 {
1316         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1317
1318         ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1319 }
1320
1321 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1322         .start = iwl_op_mode_mvm_start,
1323         .stop = iwl_op_mode_mvm_stop,
1324         .rx = iwl_mvm_rx_dispatch,
1325         .queue_full = iwl_mvm_stop_sw_queue,
1326         .queue_not_full = iwl_mvm_wake_sw_queue,
1327         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1328         .free_skb = iwl_mvm_free_skb,
1329         .nic_error = iwl_mvm_nic_error,
1330         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1331         .nic_config = iwl_mvm_nic_config,
1332         .enter_d0i3 = iwl_mvm_enter_d0i3,
1333         .exit_d0i3 = iwl_mvm_exit_d0i3,
1334         .napi_add = iwl_mvm_napi_add,
1335 };