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
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
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  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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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         u16 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 #define RX_HANDLER_GRP(_grp, _cmd, _fn, _async) \
 212         { .cmd_id = WIDE_ID(_grp, _cmd), .fn = _fn, .async = _async }
 213
 214 /*
 215  * Handlers for fw notifications
 216  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 217  * This list should be in order of frequency for performance purposes.
 218  *
 219  * The handler can be SYNC - this means that it will be called in the Rx path
 220  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 221  * only in this case!), it should be set as ASYNC. In that case, it will be
 222  * called from a worker with mvm->mutex held.
 223  */
 224 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
 225         RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
 226         RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
 227         RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
 228
 229         RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
 230         RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
 231         RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
 232         RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
 233                    iwl_mvm_rx_ant_coupling_notif, true),
 234
 235         RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
 236         RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
 237
 238         RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
 239
 240         RX_HANDLER(SCAN_ITERATION_COMPLETE,
 241                    iwl_mvm_rx_lmac_scan_iter_complete_notif, false),
 242         RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
 243                    iwl_mvm_rx_lmac_scan_complete_notif, true),
 244         RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_match_found,
 245                    false),
 246         RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
 247                    true),
 248         RX_HANDLER(SCAN_ITERATION_COMPLETE_UMAC,
 249                    iwl_mvm_rx_umac_scan_iter_complete_notif, false),
 250
 251         RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
 252
 253         RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
 254                    false),
 255
 256         RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
 257         RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
 258                    iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
 259         RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
 260
 261         RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
 262                    true),
 263         RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
 264         RX_HANDLER(TOF_NOTIFICATION, iwl_mvm_tof_resp_handler, true),
 265
 266 };
 267 #undef RX_HANDLER
 268 #undef RX_HANDLER_GRP
 269 #define CMD(x) [x] = #x
 270
 271 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
 272         CMD(MVM_ALIVE),
 273         CMD(REPLY_ERROR),
 274         CMD(INIT_COMPLETE_NOTIF),
 275         CMD(PHY_CONTEXT_CMD),
 276         CMD(MGMT_MCAST_KEY),
 277         CMD(TX_CMD),
 278         CMD(TXPATH_FLUSH),
 279         CMD(SHARED_MEM_CFG),
 280         CMD(MAC_CONTEXT_CMD),
 281         CMD(TIME_EVENT_CMD),
 282         CMD(TIME_EVENT_NOTIFICATION),
 283         CMD(BINDING_CONTEXT_CMD),
 284         CMD(TIME_QUOTA_CMD),
 285         CMD(NON_QOS_TX_COUNTER_CMD),
 286         CMD(DC2DC_CONFIG_CMD),
 287         CMD(NVM_ACCESS_CMD),
 288         CMD(PHY_CONFIGURATION_CMD),
 289         CMD(CALIB_RES_NOTIF_PHY_DB),
 290         CMD(SET_CALIB_DEFAULT_CMD),
 291         CMD(FW_PAGING_BLOCK_CMD),
 292         CMD(ADD_STA_KEY),
 293         CMD(ADD_STA),
 294         CMD(FW_GET_ITEM_CMD),
 295         CMD(REMOVE_STA),
 296         CMD(LQ_CMD),
 297         CMD(SCAN_OFFLOAD_CONFIG_CMD),
 298         CMD(MATCH_FOUND_NOTIFICATION),
 299         CMD(SCAN_OFFLOAD_REQUEST_CMD),
 300         CMD(SCAN_OFFLOAD_ABORT_CMD),
 301         CMD(HOT_SPOT_CMD),
 302         CMD(SCAN_OFFLOAD_COMPLETE),
 303         CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
 304         CMD(SCAN_ITERATION_COMPLETE),
 305         CMD(POWER_TABLE_CMD),
 306         CMD(WEP_KEY),
 307         CMD(REPLY_RX_PHY_CMD),
 308         CMD(REPLY_RX_MPDU_CMD),
 309         CMD(BEACON_NOTIFICATION),
 310         CMD(BEACON_TEMPLATE_CMD),
 311         CMD(STATISTICS_CMD),
 312         CMD(STATISTICS_NOTIFICATION),
 313         CMD(EOSP_NOTIFICATION),
 314         CMD(REDUCE_TX_POWER_CMD),
 315         CMD(TX_ANT_CONFIGURATION_CMD),
 316         CMD(D3_CONFIG_CMD),
 317         CMD(D0I3_END_CMD),
 318         CMD(PROT_OFFLOAD_CONFIG_CMD),
 319         CMD(OFFLOADS_QUERY_CMD),
 320         CMD(REMOTE_WAKE_CONFIG_CMD),
 321         CMD(WOWLAN_PATTERNS),
 322         CMD(WOWLAN_CONFIGURATION),
 323         CMD(WOWLAN_TSC_RSC_PARAM),
 324         CMD(WOWLAN_TKIP_PARAM),
 325         CMD(WOWLAN_KEK_KCK_MATERIAL),
 326         CMD(WOWLAN_GET_STATUSES),
 327         CMD(WOWLAN_TX_POWER_PER_DB),
 328         CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
 329         CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
 330         CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
 331         CMD(CARD_STATE_NOTIFICATION),
 332         CMD(MISSED_BEACONS_NOTIFICATION),
 333         CMD(BT_COEX_PRIO_TABLE),
 334         CMD(BT_COEX_PROT_ENV),
 335         CMD(BT_PROFILE_NOTIFICATION),
 336         CMD(BT_CONFIG),
 337         CMD(MCAST_FILTER_CMD),
 338         CMD(BCAST_FILTER_CMD),
 339         CMD(REPLY_SF_CFG_CMD),
 340         CMD(REPLY_BEACON_FILTERING_CMD),
 341         CMD(CMD_DTS_MEASUREMENT_TRIGGER),
 342         CMD(DTS_MEASUREMENT_NOTIFICATION),
 343         CMD(REPLY_THERMAL_MNG_BACKOFF),
 344         CMD(MAC_PM_POWER_TABLE),
 345         CMD(LTR_CONFIG),
 346         CMD(BT_COEX_CI),
 347         CMD(BT_COEX_UPDATE_SW_BOOST),
 348         CMD(BT_COEX_UPDATE_CORUN_LUT),
 349         CMD(BT_COEX_UPDATE_REDUCED_TXP),
 350         CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
 351         CMD(ANTENNA_COUPLING_NOTIFICATION),
 352         CMD(SCD_QUEUE_CFG),
 353         CMD(SCAN_CFG_CMD),
 354         CMD(SCAN_REQ_UMAC),
 355         CMD(SCAN_ABORT_UMAC),
 356         CMD(SCAN_COMPLETE_UMAC),
 357         CMD(TDLS_CHANNEL_SWITCH_CMD),
 358         CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
 359         CMD(TDLS_CONFIG_CMD),
 360         CMD(MCC_UPDATE_CMD),
 361         CMD(SCAN_ITERATION_COMPLETE_UMAC),
 362 };
 363 #undef CMD
 364
 365 /* this forward declaration can avoid to export the function */
 366 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
 367 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
 368
 369 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
 370 {
 371         const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
 372
 373         if (!pwr_tx_backoff)
 374                 return 0;
 375
 376         while (pwr_tx_backoff->pwr) {
 377                 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
 378                         return pwr_tx_backoff->backoff;
 379
 380                 pwr_tx_backoff++;
 381         }
 382
 383         return 0;
 384 }
 385
 386 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
 387
 388 static struct iwl_op_mode *
 389 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 390                       const struct iwl_fw *fw, struct dentry *dbgfs_dir)
 391 {
 392         struct ieee80211_hw *hw;
 393         struct iwl_op_mode *op_mode;
 394         struct iwl_mvm *mvm;
 395         struct iwl_trans_config trans_cfg = {};
 396         static const u8 no_reclaim_cmds[] = {
 397                 TX_CMD,
 398         };
 399         int err, scan_size;
 400         u32 min_backoff;
 401
 402         /*
 403          * We use IWL_MVM_STATION_COUNT to check the validity of the station
 404          * index all over the driver - check that its value corresponds to the
 405          * array size.
 406          */
 407         BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
 408
 409         /********************************
 410          * 1. Allocating and configuring HW data
 411          ********************************/
 412         hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
 413                                 sizeof(struct iwl_mvm),
 414                                 &iwl_mvm_hw_ops);
 415         if (!hw)
 416                 return NULL;
 417
 418         if (cfg->max_rx_agg_size)
 419                 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
 420
 421         if (cfg->max_tx_agg_size)
 422                 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
 423
 424         op_mode = hw->priv;
 425         op_mode->ops = &iwl_mvm_ops;
 426
 427         mvm = IWL_OP_MODE_GET_MVM(op_mode);
 428         mvm->dev = trans->dev;
 429         mvm->trans = trans;
 430         mvm->cfg = cfg;
 431         mvm->fw = fw;
 432         mvm->hw = hw;
 433
 434         mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
 435
 436         mvm->aux_queue = 15;
 437         mvm->first_agg_queue = 16;
 438         mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
 439         if (mvm->cfg->base_params->num_of_queues == 16) {
 440                 mvm->aux_queue = 11;
 441                 mvm->first_agg_queue = 12;
 442         }
 443         mvm->sf_state = SF_UNINIT;
 444         mvm->low_latency_agg_frame_limit = 6;
 445         mvm->cur_ucode = IWL_UCODE_INIT;
 446
 447         mutex_init(&mvm->mutex);
 448         mutex_init(&mvm->d0i3_suspend_mutex);
 449         spin_lock_init(&mvm->async_handlers_lock);
 450         INIT_LIST_HEAD(&mvm->time_event_list);
 451         INIT_LIST_HEAD(&mvm->aux_roc_te_list);
 452         INIT_LIST_HEAD(&mvm->async_handlers_list);
 453         spin_lock_init(&mvm->time_event_lock);
 454
 455         INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
 456         INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
 457         INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
 458         INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
 459         INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
 460         INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
 461
 462         spin_lock_init(&mvm->d0i3_tx_lock);
 463         spin_lock_init(&mvm->refs_lock);
 464         skb_queue_head_init(&mvm->d0i3_tx);
 465         init_waitqueue_head(&mvm->d0i3_exit_waitq);
 466
 467         SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
 468
 469         /*
 470          * Populate the state variables that the transport layer needs
 471          * to know about.
 472          */
 473         trans_cfg.op_mode = op_mode;
 474         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
 475         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
 476         trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
 477         trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa,
 478                                                IWL_UCODE_TLV_API_WIDE_CMD_HDR);
 479
 480         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
 481                 trans_cfg.bc_table_dword = true;
 482
 483         trans_cfg.command_names = iwl_mvm_cmd_strings;
 484
 485         trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
 486         trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
 487         trans_cfg.scd_set_active = true;
 488
 489         trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
 490
 491         /* Set a short watchdog for the command queue */
 492         trans_cfg.cmd_q_wdg_timeout =
 493                 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
 494
 495         snprintf(mvm->hw->wiphy->fw_version,
 496                  sizeof(mvm->hw->wiphy->fw_version),
 497                  "%s", fw->fw_version);
 498
 499         /* Configure transport layer */
 500         iwl_trans_configure(mvm->trans, &trans_cfg);
 501
 502         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
 503         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
 504         trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
 505         trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
 506         memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
 507                sizeof(trans->dbg_conf_tlv));
 508         trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
 509
 510         /* set up notification wait support */
 511         iwl_notification_wait_init(&mvm->notif_wait);
 512
 513         /* Init phy db */
 514         mvm->phy_db = iwl_phy_db_init(trans);
 515         if (!mvm->phy_db) {
 516                 IWL_ERR(mvm, "Cannot init phy_db\n");
 517                 goto out_free;
 518         }
 519
 520         IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
 521                  mvm->cfg->name, mvm->trans->hw_rev);
 522
 523         min_backoff = calc_min_backoff(trans, cfg);
 524         iwl_mvm_tt_initialize(mvm, min_backoff);
 525
 526         if (iwlwifi_mod_params.nvm_file)
 527                 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
 528         else
 529                 IWL_DEBUG_EEPROM(mvm->trans->dev,
 530                                  "working without external nvm file\n");
 531
 532         if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
 533                  "not allowing power-up and not having nvm_file\n"))
 534                 goto out_free;
 535
 536         /*
 537          * Even if nvm exists in the nvm_file driver should read again the nvm
 538          * from the nic because there might be entries that exist in the OTP
 539          * and not in the file.
 540          * for nics with no_power_up_nic_in_init: rely completley on nvm_file
 541          */
 542         if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
 543                 err = iwl_nvm_init(mvm, false);
 544                 if (err)
 545                         goto out_free;
 546         } else {
 547                 err = iwl_trans_start_hw(mvm->trans);
 548                 if (err)
 549                         goto out_free;
 550
 551                 mutex_lock(&mvm->mutex);
 552                 err = iwl_run_init_mvm_ucode(mvm, true);
 553                 if (!err || !iwlmvm_mod_params.init_dbg)
 554                         iwl_trans_stop_device(trans);
 555                 mutex_unlock(&mvm->mutex);
 556                 /* returns 0 if successful, 1 if success but in rfkill */
 557                 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
 558                         IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
 559                         goto out_free;
 560                 }
 561         }
 562
 563         scan_size = iwl_mvm_scan_size(mvm);
 564
 565         mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
 566         if (!mvm->scan_cmd)
 567                 goto out_free;
 568
 569         /* Set EBS as successful as long as not stated otherwise by the FW. */
 570         mvm->last_ebs_successful = true;
 571
 572         err = iwl_mvm_mac_setup_register(mvm);
 573         if (err)
 574                 goto out_free;
 575
 576         err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
 577         if (err)
 578                 goto out_unregister;
 579
 580         memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
 581
 582         /* rpm starts with a taken ref. only set the appropriate bit here. */
 583         mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
 584
 585         iwl_mvm_tof_init(mvm);
 586
 587         return op_mode;
 588
 589  out_unregister:
 590         ieee80211_unregister_hw(mvm->hw);
 591         iwl_mvm_leds_exit(mvm);
 592  out_free:
 593         iwl_phy_db_free(mvm->phy_db);
 594         kfree(mvm->scan_cmd);
 595         if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
 596                 iwl_trans_op_mode_leave(trans);
 597         ieee80211_free_hw(mvm->hw);
 598         return NULL;
 599 }
 600
 601 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
 602 {
 603         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 604         int i;
 605
 606         iwl_mvm_leds_exit(mvm);
 607
 608         iwl_mvm_tt_exit(mvm);
 609
 610         ieee80211_unregister_hw(mvm->hw);
 611
 612         kfree(mvm->scan_cmd);
 613         kfree(mvm->mcast_filter_cmd);
 614         mvm->mcast_filter_cmd = NULL;
 615
 616 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
 617         kfree(mvm->d3_resume_sram);
 618         if (mvm->nd_config) {
 619                 kfree(mvm->nd_config->match_sets);
 620                 kfree(mvm->nd_config);
 621                 mvm->nd_config = NULL;
 622         }
 623 #endif
 624
 625         iwl_trans_op_mode_leave(mvm->trans);
 626
 627         iwl_phy_db_free(mvm->phy_db);
 628         mvm->phy_db = NULL;
 629
 630         iwl_free_nvm_data(mvm->nvm_data);
 631         for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
 632                 kfree(mvm->nvm_sections[i].data);
 633
 634         iwl_mvm_tof_clean(mvm);
 635
 636         ieee80211_free_hw(mvm->hw);
 637 }
 638
 639 struct iwl_async_handler_entry {
 640         struct list_head list;
 641         struct iwl_rx_cmd_buffer rxb;
 642         void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
 643 };
 644
 645 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
 646 {
 647         struct iwl_async_handler_entry *entry, *tmp;
 648
 649         spin_lock_bh(&mvm->async_handlers_lock);
 650         list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
 651                 iwl_free_rxb(&entry->rxb);
 652                 list_del(&entry->list);
 653                 kfree(entry);
 654         }
 655         spin_unlock_bh(&mvm->async_handlers_lock);
 656 }
 657
 658 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
 659 {
 660         struct iwl_mvm *mvm =
 661                 container_of(wk, struct iwl_mvm, async_handlers_wk);
 662         struct iwl_async_handler_entry *entry, *tmp;
 663         struct list_head local_list;
 664
 665         INIT_LIST_HEAD(&local_list);
 666
 667         /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
 668         mutex_lock(&mvm->mutex);
 669
 670         /*
 671          * Sync with Rx path with a lock. Remove all the entries from this list,
 672          * add them to a local one (lock free), and then handle them.
 673          */
 674         spin_lock_bh(&mvm->async_handlers_lock);
 675         list_splice_init(&mvm->async_handlers_list, &local_list);
 676         spin_unlock_bh(&mvm->async_handlers_lock);
 677
 678         list_for_each_entry_safe(entry, tmp, &local_list, list) {
 679                 entry->fn(mvm, &entry->rxb);
 680                 iwl_free_rxb(&entry->rxb);
 681                 list_del(&entry->list);
 682                 kfree(entry);
 683         }
 684         mutex_unlock(&mvm->mutex);
 685 }
 686
 687 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
 688                                             struct iwl_rx_packet *pkt)
 689 {
 690         struct iwl_fw_dbg_trigger_tlv *trig;
 691         struct iwl_fw_dbg_trigger_cmd *cmds_trig;
 692         int i;
 693
 694         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
 695                 return;
 696
 697         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
 698         cmds_trig = (void *)trig->data;
 699
 700         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 701                 return;
 702
 703         for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
 704                 /* don't collect on CMD 0 */
 705                 if (!cmds_trig->cmds[i].cmd_id)
 706                         break;
 707
 708                 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd ||
 709                     cmds_trig->cmds[i].group_id != pkt->hdr.group_id)
 710                         continue;
 711
 712                 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
 713                                             "CMD 0x%02x.%02x received",
 714                                             pkt->hdr.group_id, pkt->hdr.cmd);
 715                 break;
 716         }
 717 }
 718
 719 static void iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
 720                                 struct iwl_rx_cmd_buffer *rxb)
 721 {
 722         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 723         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 724         u8 i;
 725
 726         if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD)) {
 727                 iwl_mvm_rx_rx_mpdu(mvm, rxb);
 728                 return;
 729         }
 730
 731         iwl_mvm_rx_check_trigger(mvm, pkt);
 732
 733         /*
 734          * Do the notification wait before RX handlers so
 735          * even if the RX handler consumes the RXB we have
 736          * access to it in the notification wait entry.
 737          */
 738         iwl_notification_wait_notify(&mvm->notif_wait, pkt);
 739
 740         for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
 741                 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
 742                 struct iwl_async_handler_entry *entry;
 743
 744                 if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
 745                         continue;
 746
 747                 if (!rx_h->async) {
 748                         rx_h->fn(mvm, rxb);
 749                         return;
 750                 }
 751
 752                 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 753                 /* we can't do much... */
 754                 if (!entry)
 755                         return;
 756
 757                 entry->rxb._page = rxb_steal_page(rxb);
 758                 entry->rxb._offset = rxb->_offset;
 759                 entry->rxb._rx_page_order = rxb->_rx_page_order;
 760                 entry->fn = rx_h->fn;
 761                 spin_lock(&mvm->async_handlers_lock);
 762                 list_add_tail(&entry->list, &mvm->async_handlers_list);
 763                 spin_unlock(&mvm->async_handlers_lock);
 764                 schedule_work(&mvm->async_handlers_wk);
 765                 break;
 766         }
 767 }
 768
 769 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
 770 {
 771         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 772         int mq = mvm->queue_to_mac80211[queue];
 773
 774         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 775                 return;
 776
 777         if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
 778                 IWL_DEBUG_TX_QUEUES(mvm,
 779                                     "queue %d (mac80211 %d) already stopped\n",
 780                                     queue, mq);
 781                 return;
 782         }
 783
 784         ieee80211_stop_queue(mvm->hw, mq);
 785 }
 786
 787 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
 788 {
 789         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 790         int mq = mvm->queue_to_mac80211[queue];
 791
 792         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
 793                 return;
 794
 795         if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
 796                 IWL_DEBUG_TX_QUEUES(mvm,
 797                                     "queue %d (mac80211 %d) still stopped\n",
 798                                     queue, mq);
 799                 return;
 800         }
 801
 802         ieee80211_wake_queue(mvm->hw, mq);
 803 }
 804
 805 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 806 {
 807         if (state)
 808                 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 809         else
 810                 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
 811
 812         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 813 }
 814
 815 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 816 {
 817         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 818         bool calibrating = ACCESS_ONCE(mvm->calibrating);
 819
 820         if (state)
 821                 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 822         else
 823                 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
 824
 825         wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
 826
 827         /* iwl_run_init_mvm_ucode is waiting for results, abort it */
 828         if (calibrating)
 829                 iwl_abort_notification_waits(&mvm->notif_wait);
 830
 831         /*
 832          * Stop the device if we run OPERATIONAL firmware or if we are in the
 833          * middle of the calibrations.
 834          */
 835         return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
 836 }
 837
 838 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 839 {
 840         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 841         struct ieee80211_tx_info *info;
 842
 843         info = IEEE80211_SKB_CB(skb);
 844         iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
 845         ieee80211_free_txskb(mvm->hw, skb);
 846 }
 847
 848 struct iwl_mvm_reprobe {
 849         struct device *dev;
 850         struct work_struct work;
 851 };
 852
 853 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
 854 {
 855         struct iwl_mvm_reprobe *reprobe;
 856
 857         reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
 858         if (device_reprobe(reprobe->dev))
 859                 dev_err(reprobe->dev, "reprobe failed!\n");
 860         kfree(reprobe);
 861         module_put(THIS_MODULE);
 862 }
 863
 864 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
 865 {
 866         struct iwl_mvm *mvm =
 867                 container_of(work, struct iwl_mvm, fw_dump_wk.work);
 868
 869         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
 870                 return;
 871
 872         mutex_lock(&mvm->mutex);
 873
 874         /* stop recording */
 875         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
 876                 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
 877         } else {
 878                 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
 879                 /* wait before we collect the data till the DBGC stop */
 880                 udelay(100);
 881         }
 882
 883         iwl_mvm_fw_error_dump(mvm);
 884
 885         /* start recording again if the firmware is not crashed */
 886         WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
 887                      mvm->fw->dbg_dest_tlv &&
 888                      iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
 889
 890         mutex_unlock(&mvm->mutex);
 891
 892         iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
 893 }
 894
 895 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 896 {
 897         iwl_abort_notification_waits(&mvm->notif_wait);
 898
 899         /*
 900          * This is a bit racy, but worst case we tell mac80211 about
 901          * a stopped/aborted scan when that was already done which
 902          * is not a problem. It is necessary to abort any os scan
 903          * here because mac80211 requires having the scan cleared
 904          * before restarting.
 905          * We'll reset the scan_status to NONE in restart cleanup in
 906          * the next start() call from mac80211. If restart isn't called
 907          * (no fw restart) scan status will stay busy.
 908          */
 909         iwl_mvm_report_scan_aborted(mvm);
 910
 911         /*
 912          * If we're restarting already, don't cycle restarts.
 913          * If INIT fw asserted, it will likely fail again.
 914          * If WoWLAN fw asserted, don't restart either, mac80211
 915          * can't recover this since we're already half suspended.
 916          */
 917         if (!mvm->restart_fw && fw_error) {
 918                 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert,
 919                                             NULL);
 920         } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
 921                                     &mvm->status)) {
 922                 struct iwl_mvm_reprobe *reprobe;
 923
 924                 IWL_ERR(mvm,
 925                         "Firmware error during reconfiguration - reprobe!\n");
 926
 927                 /*
 928                  * get a module reference to avoid doing this while unloading
 929                  * anyway and to avoid scheduling a work with code that's
 930                  * being removed.
 931                  */
 932                 if (!try_module_get(THIS_MODULE)) {
 933                         IWL_ERR(mvm, "Module is being unloaded - abort\n");
 934                         return;
 935                 }
 936
 937                 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
 938                 if (!reprobe) {
 939                         module_put(THIS_MODULE);
 940                         return;
 941                 }
 942                 reprobe->dev = mvm->trans->dev;
 943                 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
 944                 schedule_work(&reprobe->work);
 945         } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
 946                 /* don't let the transport/FW power down */
 947                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 948
 949                 if (fw_error && mvm->restart_fw > 0)
 950                         mvm->restart_fw--;
 951                 ieee80211_restart_hw(mvm->hw);
 952         }
 953 }
 954
 955 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
 956 {
 957         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 958
 959         iwl_mvm_dump_nic_error_log(mvm);
 960
 961         iwl_mvm_nic_restart(mvm, true);
 962 }
 963
 964 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
 965 {
 966         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 967
 968         WARN_ON(1);
 969         iwl_mvm_nic_restart(mvm, true);
 970 }
 971
 972 struct iwl_d0i3_iter_data {
 973         struct iwl_mvm *mvm;
 974         u8 ap_sta_id;
 975         u8 vif_count;
 976         u8 offloading_tid;
 977         bool disable_offloading;
 978 };
 979
 980 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
 981                                         struct ieee80211_vif *vif,
 982                                         struct iwl_d0i3_iter_data *iter_data)
 983 {
 984         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 985         struct ieee80211_sta *ap_sta;
 986         struct iwl_mvm_sta *mvmsta;
 987         u32 available_tids = 0;
 988         u8 tid;
 989
 990         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
 991                     mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
 992                 return false;
 993
 994         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
 995         if (IS_ERR_OR_NULL(ap_sta))
 996                 return false;
 997
 998         mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
 999         spin_lock_bh(&mvmsta->lock);
1000         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1001                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1002
1003                 /*
1004                  * in case of pending tx packets, don't use this tid
1005                  * for offloading in order to prevent reuse of the same
1006                  * qos seq counters.
1007                  */
1008                 if (iwl_mvm_tid_queued(tid_data))
1009                         continue;
1010
1011                 if (tid_data->state != IWL_AGG_OFF)
1012                         continue;
1013
1014                 available_tids |= BIT(tid);
1015         }
1016         spin_unlock_bh(&mvmsta->lock);
1017
1018         /*
1019          * disallow protocol offloading if we have no available tid
1020          * (with no pending frames and no active aggregation,
1021          * as we don't handle "holes" properly - the scheduler needs the
1022          * frame's seq number and TFD index to match)
1023          */
1024         if (!available_tids)
1025                 return true;
1026
1027         /* for simplicity, just use the first available tid */
1028         iter_data->offloading_tid = ffs(available_tids) - 1;
1029         return false;
1030 }
1031
1032 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1033                                         struct ieee80211_vif *vif)
1034 {
1035         struct iwl_d0i3_iter_data *data = _data;
1036         struct iwl_mvm *mvm = data->mvm;
1037         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1038         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1039
1040         IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1041         if (vif->type != NL80211_IFTYPE_STATION ||
1042             !vif->bss_conf.assoc)
1043                 return;
1044
1045         /*
1046          * in case of pending tx packets or active aggregations,
1047          * avoid offloading features in order to prevent reuse of
1048          * the same qos seq counters.
1049          */
1050         if (iwl_mvm_disallow_offloading(mvm, vif, data))
1051                 data->disable_offloading = true;
1052
1053         iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1054         iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1055
1056         /*
1057          * on init/association, mvm already configures POWER_TABLE_CMD
1058          * and REPLY_MCAST_FILTER_CMD, so currently don't
1059          * reconfigure them (we might want to use different
1060          * params later on, though).
1061          */
1062         data->ap_sta_id = mvmvif->ap_sta_id;
1063         data->vif_count++;
1064 }
1065
1066 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1067                                     struct iwl_wowlan_config_cmd *cmd,
1068                                     struct iwl_d0i3_iter_data *iter_data)
1069 {
1070         struct ieee80211_sta *ap_sta;
1071         struct iwl_mvm_sta *mvm_ap_sta;
1072
1073         if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1074                 return;
1075
1076         rcu_read_lock();
1077
1078         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1079         if (IS_ERR_OR_NULL(ap_sta))
1080                 goto out;
1081
1082         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1083         cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1084         cmd->offloading_tid = iter_data->offloading_tid;
1085
1086         /*
1087          * The d0i3 uCode takes care of the nonqos counters,
1088          * so configure only the qos seq ones.
1089          */
1090         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1091 out:
1092         rcu_read_unlock();
1093 }
1094
1095 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1096 {
1097         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1098         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1099         int ret;
1100         struct iwl_d0i3_iter_data d0i3_iter_data = {
1101                 .mvm = mvm,
1102         };
1103         struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1104                 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1105                                              IWL_WOWLAN_WAKEUP_BEACON_MISS |
1106                                              IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1107                                              IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1108         };
1109         struct iwl_d3_manager_config d3_cfg_cmd = {
1110                 .min_sleep_time = cpu_to_le32(1000),
1111                 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1112         };
1113
1114         IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1115
1116         /* make sure we have no running tx while configuring the qos */
1117         set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1118         synchronize_net();
1119
1120         /*
1121          * iwl_mvm_ref_sync takes a reference before checking the flag.
1122          * so by checking there is no held reference we prevent a state
1123          * in which iwl_mvm_ref_sync continues successfully while we
1124          * configure the firmware to enter d0i3
1125          */
1126         if (iwl_mvm_ref_taken(mvm)) {
1127                 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1128                 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1129                 wake_up(&mvm->d0i3_exit_waitq);
1130                 return 1;
1131         }
1132
1133         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1134                                                    IEEE80211_IFACE_ITER_NORMAL,
1135                                                    iwl_mvm_enter_d0i3_iterator,
1136                                                    &d0i3_iter_data);
1137         if (d0i3_iter_data.vif_count == 1) {
1138                 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1139                 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1140         } else {
1141                 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1142                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1143                 mvm->d0i3_offloading = false;
1144         }
1145
1146         iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1147         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1148                                    sizeof(wowlan_config_cmd),
1149                                    &wowlan_config_cmd);
1150         if (ret)
1151                 return ret;
1152
1153         return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1154                                     flags | CMD_MAKE_TRANS_IDLE,
1155                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1156 }
1157
1158 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1159                                        struct ieee80211_vif *vif)
1160 {
1161         struct iwl_mvm *mvm = _data;
1162         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1163
1164         IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1165         if (vif->type != NL80211_IFTYPE_STATION ||
1166             !vif->bss_conf.assoc)
1167                 return;
1168
1169         iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1170 }
1171
1172 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1173                                          struct ieee80211_vif *vif)
1174 {
1175         struct iwl_mvm *mvm = data;
1176         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1177
1178         if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1179             mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1180                 iwl_mvm_connection_loss(mvm, vif, "D0i3");
1181 }
1182
1183 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1184 {
1185         struct ieee80211_sta *sta = NULL;
1186         struct iwl_mvm_sta *mvm_ap_sta;
1187         int i;
1188         bool wake_queues = false;
1189
1190         lockdep_assert_held(&mvm->mutex);
1191
1192         spin_lock_bh(&mvm->d0i3_tx_lock);
1193
1194         if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1195                 goto out;
1196
1197         IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1198
1199         /* get the sta in order to update seq numbers and re-enqueue skbs */
1200         sta = rcu_dereference_protected(
1201                         mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1202                         lockdep_is_held(&mvm->mutex));
1203
1204         if (IS_ERR_OR_NULL(sta)) {
1205                 sta = NULL;
1206                 goto out;
1207         }
1208
1209         if (mvm->d0i3_offloading && qos_seq) {
1210                 /* update qos seq numbers if offloading was enabled */
1211                 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1212                 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1213                         u16 seq = le16_to_cpu(qos_seq[i]);
1214                         /* firmware stores last-used one, we store next one */
1215                         seq += 0x10;
1216                         mvm_ap_sta->tid_data[i].seq_number = seq;
1217                 }
1218         }
1219 out:
1220         /* re-enqueue (or drop) all packets */
1221         while (!skb_queue_empty(&mvm->d0i3_tx)) {
1222                 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1223
1224                 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1225                         ieee80211_free_txskb(mvm->hw, skb);
1226
1227                 /* if the skb_queue is not empty, we need to wake queues */
1228                 wake_queues = true;
1229         }
1230         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1231         wake_up(&mvm->d0i3_exit_waitq);
1232         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1233         if (wake_queues)
1234                 ieee80211_wake_queues(mvm->hw);
1235
1236         spin_unlock_bh(&mvm->d0i3_tx_lock);
1237 }
1238
1239 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1240 {
1241         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1242         struct iwl_host_cmd get_status_cmd = {
1243                 .id = WOWLAN_GET_STATUSES,
1244                 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1245         };
1246         struct iwl_wowlan_status *status;
1247         int ret;
1248         u32 disconnection_reasons, wakeup_reasons;
1249         __le16 *qos_seq = NULL;
1250
1251         mutex_lock(&mvm->mutex);
1252         ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1253         if (ret)
1254                 goto out;
1255
1256         if (!get_status_cmd.resp_pkt)
1257                 goto out;
1258
1259         status = (void *)get_status_cmd.resp_pkt->data;
1260         wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1261         qos_seq = status->qos_seq_ctr;
1262
1263         IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1264
1265         disconnection_reasons =
1266                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1267                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1268         if (wakeup_reasons & disconnection_reasons)
1269                 ieee80211_iterate_active_interfaces(
1270                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1271                         iwl_mvm_d0i3_disconnect_iter, mvm);
1272 out:
1273         iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1274
1275         /* qos_seq might point inside resp_pkt, so free it only now */
1276         if (get_status_cmd.resp_pkt)
1277                 iwl_free_resp(&get_status_cmd);
1278
1279         /* the FW might have updated the regdomain */
1280         iwl_mvm_update_changed_regdom(mvm);
1281
1282         iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1283         mutex_unlock(&mvm->mutex);
1284 }
1285
1286 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1287 {
1288         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1289                     CMD_WAKE_UP_TRANS;
1290         int ret;
1291
1292         IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1293
1294         mutex_lock(&mvm->d0i3_suspend_mutex);
1295         if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1296                 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1297                 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1298                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1299                 return 0;
1300         }
1301         mutex_unlock(&mvm->d0i3_suspend_mutex);
1302
1303         ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1304         if (ret)
1305                 goto out;
1306
1307         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1308                                                    IEEE80211_IFACE_ITER_NORMAL,
1309                                                    iwl_mvm_exit_d0i3_iterator,
1310                                                    mvm);
1311 out:
1312         schedule_work(&mvm->d0i3_exit_work);
1313         return ret;
1314 }
1315
1316 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1317 {
1318         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1319
1320         iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1321         return _iwl_mvm_exit_d0i3(mvm);
1322 }
1323
1324 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1325                              struct napi_struct *napi,
1326                              struct net_device *napi_dev,
1327                              int (*poll)(struct napi_struct *, int),
1328                              int weight)
1329 {
1330         struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1331
1332         netif_napi_add(napi_dev, napi, poll, weight);
1333         mvm->napi = napi;
1334 }
1335
1336 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1337         .start = iwl_op_mode_mvm_start,
1338         .stop = iwl_op_mode_mvm_stop,
1339         .rx = iwl_mvm_rx_dispatch,
1340         .queue_full = iwl_mvm_stop_sw_queue,
1341         .queue_not_full = iwl_mvm_wake_sw_queue,
1342         .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1343         .free_skb = iwl_mvm_free_skb,
1344         .nic_error = iwl_mvm_nic_error,
1345         .cmd_queue_full = iwl_mvm_cmd_queue_full,
1346         .nic_config = iwl_mvm_nic_config,
1347         .enter_d0i3 = iwl_mvm_enter_d0i3,
1348         .exit_d0i3 = iwl_mvm_exit_d0i3,
1349         .napi_add = iwl_mvm_napi_add,
1350 };