/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <linux/module.h>
#include <net/mac80211.h>

#include "iwl-notif-wait.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
#include "iwl-fw.h"
#include "iwl-debug.h"
#include "iwl-drv.h"
#include "iwl-modparams.h"
#include "mvm.h"
#include "iwl-phy-db.h"
#include "iwl-eeprom-parse.h"
#include "iwl-csr.h"
#include "iwl-io.h"
#include "iwl-prph.h"
#include "rs.h"
#include "fw-api-scan.h"
#include "time-event.h"

/*
 * module name, copyright, version, etc.
 */
#define DRV_DESCRIPTION "The new Intel(R) wireless AGN driver for Linux"

#define DRV_VERSION     IWLWIFI_VERSION

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");

static const struct iwl_op_mode_ops iwl_mvm_ops;

struct iwl_mvm_mod_params iwlmvm_mod_params = {
        .power_scheme = IWL_POWER_SCHEME_BPS,
        /* rest of fields are 0 by default */
};

module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
MODULE_PARM_DESC(init_dbg,
                 "set to true to debug an ASSERT in INIT fw (default: false");
module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
MODULE_PARM_DESC(power_scheme,
                 "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");

/*
 * module init and exit functions
 */
static int __init iwl_mvm_init(void)
{
        int ret;

        ret = iwl_mvm_rate_control_register();
        if (ret) {
                pr_err("Unable to register rate control algorithm: %d\n", ret);
                return ret;
        }

        ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);

        if (ret) {
                pr_err("Unable to register MVM op_mode: %d\n", ret);
                iwl_mvm_rate_control_unregister();
        }

        return ret;
}
module_init(iwl_mvm_init);

static void __exit iwl_mvm_exit(void)
{
        iwl_opmode_deregister("iwlmvm");
        iwl_mvm_rate_control_unregister();
}
module_exit(iwl_mvm_exit);

static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
{
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
        u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
        u32 reg_val = 0;

        radio_cfg_type = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_TYPE) >>
                          FW_PHY_CFG_RADIO_TYPE_POS;
        radio_cfg_step = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_STEP) >>
                          FW_PHY_CFG_RADIO_STEP_POS;
        radio_cfg_dash = (mvm->fw->phy_config & FW_PHY_CFG_RADIO_DASH) >>
                          FW_PHY_CFG_RADIO_DASH_POS;

        /* SKU control */
        reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
                                CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
        reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
                                CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;

        /* radio configuration */
        reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
        reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
        reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;

        WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
                 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);

        /* silicon bits */
        reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;

        iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
                                CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
                                CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
                                CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
                                CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
                                CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
                                CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
                                CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
                                reg_val);

        IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
                       radio_cfg_step, radio_cfg_dash);

        /*
         * W/A : NIC is stuck in a reset state after Early PCIe power off
         * (PCIe power is lost before PERST# is asserted), causing ME FW
         * to lose ownership and not being able to obtain it back.
         */
        iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
                               APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
                               ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
}

struct iwl_rx_handlers {
        u8 cmd_id;
        bool async;
        int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
                  struct iwl_device_cmd *cmd);
};

#define RX_HANDLER(_cmd_id, _fn, _async)        \
        { .cmd_id = _cmd_id , .fn = _fn , .async = _async }

/*
 * Handlers for fw notifications
 * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
 * This list should be in order of frequency for performance purposes.
 *
 * The handler can be SYNC - this means that it will be called in the Rx path
 * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
 * only in this case!), it should be set as ASYNC. In that case, it will be
 * called from a worker with mvm->mutex held.
 */
static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
        RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
        RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
        RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
        RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
        RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),

        RX_HANDLER(SCAN_REQUEST_CMD, iwl_mvm_rx_scan_response, false),
        RX_HANDLER(SCAN_COMPLETE_NOTIFICATION, iwl_mvm_rx_scan_complete, false),

        RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
        RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, false),

        RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
        RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),

        RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
};
#undef RX_HANDLER
#define CMD(x) [x] = #x

static const char *iwl_mvm_cmd_strings[REPLY_MAX] = {
        CMD(MVM_ALIVE),
        CMD(REPLY_ERROR),
        CMD(INIT_COMPLETE_NOTIF),
        CMD(PHY_CONTEXT_CMD),
        CMD(MGMT_MCAST_KEY),
        CMD(TX_CMD),
        CMD(TXPATH_FLUSH),
        CMD(MAC_CONTEXT_CMD),
        CMD(TIME_EVENT_CMD),
        CMD(TIME_EVENT_NOTIFICATION),
        CMD(BINDING_CONTEXT_CMD),
        CMD(TIME_QUOTA_CMD),
        CMD(RADIO_VERSION_NOTIFICATION),
        CMD(SCAN_REQUEST_CMD),
        CMD(SCAN_ABORT_CMD),
        CMD(SCAN_START_NOTIFICATION),
        CMD(SCAN_RESULTS_NOTIFICATION),
        CMD(SCAN_COMPLETE_NOTIFICATION),
        CMD(NVM_ACCESS_CMD),
        CMD(PHY_CONFIGURATION_CMD),
        CMD(CALIB_RES_NOTIF_PHY_DB),
        CMD(SET_CALIB_DEFAULT_CMD),
        CMD(CALIBRATION_COMPLETE_NOTIFICATION),
        CMD(ADD_STA),
        CMD(REMOVE_STA),
        CMD(LQ_CMD),
        CMD(SCAN_OFFLOAD_CONFIG_CMD),
        CMD(SCAN_OFFLOAD_REQUEST_CMD),
        CMD(SCAN_OFFLOAD_ABORT_CMD),
        CMD(SCAN_OFFLOAD_COMPLETE),
        CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
        CMD(POWER_TABLE_CMD),
        CMD(WEP_KEY),
        CMD(REPLY_RX_PHY_CMD),
        CMD(REPLY_RX_MPDU_CMD),
        CMD(BEACON_NOTIFICATION),
        CMD(BEACON_TEMPLATE_CMD),
        CMD(STATISTICS_NOTIFICATION),
        CMD(TX_ANT_CONFIGURATION_CMD),
        CMD(D3_CONFIG_CMD),
        CMD(PROT_OFFLOAD_CONFIG_CMD),
        CMD(OFFLOADS_QUERY_CMD),
        CMD(REMOTE_WAKE_CONFIG_CMD),
        CMD(WOWLAN_PATTERNS),
        CMD(WOWLAN_CONFIGURATION),
        CMD(WOWLAN_TSC_RSC_PARAM),
        CMD(WOWLAN_TKIP_PARAM),
        CMD(WOWLAN_KEK_KCK_MATERIAL),
        CMD(WOWLAN_GET_STATUSES),
        CMD(WOWLAN_TX_POWER_PER_DB),
        CMD(NET_DETECT_CONFIG_CMD),
        CMD(NET_DETECT_PROFILES_QUERY_CMD),
        CMD(NET_DETECT_PROFILES_CMD),
        CMD(NET_DETECT_HOTSPOTS_CMD),
        CMD(NET_DETECT_HOTSPOTS_QUERY_CMD),
        CMD(CARD_STATE_NOTIFICATION),
        CMD(BT_COEX_PRIO_TABLE),
        CMD(BT_COEX_PROT_ENV),
        CMD(BT_PROFILE_NOTIFICATION),
        CMD(BT_CONFIG),
        CMD(MCAST_FILTER_CMD),
};
#undef CMD

/* this forward declaration can avoid to export the function */
static void iwl_mvm_async_handlers_wk(struct work_struct *wk);

static struct iwl_op_mode *
iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
                      const struct iwl_fw *fw, struct dentry *dbgfs_dir)
{
        struct ieee80211_hw *hw;
        struct iwl_op_mode *op_mode;
        struct iwl_mvm *mvm;
        struct iwl_trans_config trans_cfg = {};
        static const u8 no_reclaim_cmds[] = {
                TX_CMD,
        };
        int err, scan_size;

        /********************************
         * 1. Allocating and configuring HW data
         ********************************/
        hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
                                sizeof(struct iwl_mvm),
                                &iwl_mvm_hw_ops);
        if (!hw)
                return NULL;

        op_mode = hw->priv;
        op_mode->ops = &iwl_mvm_ops;
        op_mode->trans = trans;

        mvm = IWL_OP_MODE_GET_MVM(op_mode);
        mvm->dev = trans->dev;
        mvm->trans = trans;
        mvm->cfg = cfg;
        mvm->fw = fw;
        mvm->hw = hw;

        mutex_init(&mvm->mutex);
        spin_lock_init(&mvm->async_handlers_lock);
        INIT_LIST_HEAD(&mvm->time_event_list);
        INIT_LIST_HEAD(&mvm->async_handlers_list);
        spin_lock_init(&mvm->time_event_lock);

        INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
        INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
        INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);

        SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);

        /*
         * Populate the state variables that the transport layer needs
         * to know about.
         */
        trans_cfg.op_mode = op_mode;
        trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
        trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
        trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;

        if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
                trans_cfg.bc_table_dword = true;

        if (!iwlwifi_mod_params.wd_disable)
                trans_cfg.queue_watchdog_timeout = cfg->base_params->wd_timeout;
        else
                trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;

        trans_cfg.command_names = iwl_mvm_cmd_strings;

        trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
        trans_cfg.cmd_fifo = IWL_MVM_CMD_FIFO;

        snprintf(mvm->hw->wiphy->fw_version,
                 sizeof(mvm->hw->wiphy->fw_version),
                 "%s", fw->fw_version);

        /* Configure transport layer */
        iwl_trans_configure(mvm->trans, &trans_cfg);

        trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
        trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);

        /* set up notification wait support */
        iwl_notification_wait_init(&mvm->notif_wait);

        /* Init phy db */
        mvm->phy_db = iwl_phy_db_init(trans);
        if (!mvm->phy_db) {
                IWL_ERR(mvm, "Cannot init phy_db\n");
                goto out_free;
        }

        IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
                 mvm->cfg->name, mvm->trans->hw_rev);

        err = iwl_trans_start_hw(mvm->trans);
        if (err)
                goto out_free;

        mutex_lock(&mvm->mutex);
        err = iwl_run_init_mvm_ucode(mvm, true);
        mutex_unlock(&mvm->mutex);
        if (err && !iwlmvm_mod_params.init_dbg) {
                IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
                goto out_free;
        }

        /* Stop the hw after the ALIVE and NVM has been read */
        if (!iwlmvm_mod_params.init_dbg)
                iwl_trans_stop_hw(mvm->trans, false);

        scan_size = sizeof(struct iwl_scan_cmd) +
                mvm->fw->ucode_capa.max_probe_length +
                (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel));
        mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
        if (!mvm->scan_cmd)
                goto out_free;

        err = iwl_mvm_mac_setup_register(mvm);
        if (err)
                goto out_free;

        err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
        if (err)
                goto out_unregister;

        return op_mode;

 out_unregister:
        ieee80211_unregister_hw(mvm->hw);
 out_free:
        iwl_phy_db_free(mvm->phy_db);
        kfree(mvm->scan_cmd);
        iwl_trans_stop_hw(trans, true);
        ieee80211_free_hw(mvm->hw);
        return NULL;
}

static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
{
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
        int i;

        iwl_mvm_leds_exit(mvm);

        ieee80211_unregister_hw(mvm->hw);

        kfree(mvm->scan_cmd);

        iwl_trans_stop_hw(mvm->trans, true);

        iwl_phy_db_free(mvm->phy_db);
        mvm->phy_db = NULL;

        iwl_free_nvm_data(mvm->nvm_data);
        for (i = 0; i < NVM_NUM_OF_SECTIONS; i++)
                kfree(mvm->nvm_sections[i].data);

        ieee80211_free_hw(mvm->hw);
}

struct iwl_async_handler_entry {
        struct list_head list;
        struct iwl_rx_cmd_buffer rxb;
        int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
                  struct iwl_device_cmd *cmd);
};

void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
{
        struct iwl_async_handler_entry *entry, *tmp;

        spin_lock_bh(&mvm->async_handlers_lock);
        list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
                iwl_free_rxb(&entry->rxb);
                list_del(&entry->list);
                kfree(entry);
        }
        spin_unlock_bh(&mvm->async_handlers_lock);
}

static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
{
        struct iwl_mvm *mvm =
                container_of(wk, struct iwl_mvm, async_handlers_wk);
        struct iwl_async_handler_entry *entry, *tmp;
        struct list_head local_list;

        INIT_LIST_HEAD(&local_list);

        /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
        mutex_lock(&mvm->mutex);

        /*
         * Sync with Rx path with a lock. Remove all the entries from this list,
         * add them to a local one (lock free), and then handle them.
         */
        spin_lock_bh(&mvm->async_handlers_lock);
        list_splice_init(&mvm->async_handlers_list, &local_list);
        spin_unlock_bh(&mvm->async_handlers_lock);

        list_for_each_entry_safe(entry, tmp, &local_list, list) {
                if (entry->fn(mvm, &entry->rxb, NULL))
                        IWL_WARN(mvm,
                                 "returned value from ASYNC handlers are ignored\n");
                iwl_free_rxb(&entry->rxb);
                list_del(&entry->list);
                kfree(entry);
        }
        mutex_unlock(&mvm->mutex);
}

static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
                               struct iwl_rx_cmd_buffer *rxb,
                               struct iwl_device_cmd *cmd)
{
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
        u8 i;

        /*
         * Do the notification wait before RX handlers so
         * even if the RX handler consumes the RXB we have
         * access to it in the notification wait entry.
         */
        iwl_notification_wait_notify(&mvm->notif_wait, pkt);

        for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
                const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
                struct iwl_async_handler_entry *entry;

                if (rx_h->cmd_id != pkt->hdr.cmd)
                        continue;

                if (!rx_h->async)
                        return rx_h->fn(mvm, rxb, cmd);

                entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
                /* we can't do much... */
                if (!entry)
                        return 0;

                entry->rxb._page = rxb_steal_page(rxb);
                entry->rxb._offset = rxb->_offset;
                entry->rxb._rx_page_order = rxb->_rx_page_order;
                entry->fn = rx_h->fn;
                spin_lock(&mvm->async_handlers_lock);
                list_add_tail(&entry->list, &mvm->async_handlers_list);
                spin_unlock(&mvm->async_handlers_lock);
                schedule_work(&mvm->async_handlers_wk);
                break;
        }

        return 0;
}

static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
{
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
        int mq = mvm->queue_to_mac80211[queue];

        if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
                return;

        if (atomic_inc_return(&mvm->queue_stop_count[mq]) > 1) {
                IWL_DEBUG_TX_QUEUES(mvm,
                                    "queue %d (mac80211 %d) already stopped\n",
                                    queue, mq);
                return;
        }

        set_bit(mq, &mvm->transport_queue_stop);
        ieee80211_stop_queue(mvm->hw, mq);
}

static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
{
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
        int mq = mvm->queue_to_mac80211[queue];

        if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
                return;

        if (atomic_dec_return(&mvm->queue_stop_count[mq]) > 0) {
                IWL_DEBUG_TX_QUEUES(mvm,
                                    "queue %d (mac80211 %d) already awake\n",
                                    queue, mq);
                return;
        }

        clear_bit(mq, &mvm->transport_queue_stop);

        ieee80211_wake_queue(mvm->hw, mq);
}

static void iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
{
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

        if (state)
                set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
        else
                clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);

        wiphy_rfkill_set_hw_state(mvm->hw->wiphy, state);
}

static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
{
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
        struct ieee80211_tx_info *info;

        info = IEEE80211_SKB_CB(skb);
        iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
        ieee80211_free_txskb(mvm->hw, skb);
}

static void iwl_mvm_nic_restart(struct iwl_mvm *mvm)
{
        iwl_abort_notification_waits(&mvm->notif_wait);

        /*
         * If we're restarting already, don't cycle restarts.
         * If INIT fw asserted, it will likely fail again.
         * If WoWLAN fw asserted, don't restart either, mac80211
         * can't recover this since we're already half suspended.
         */
        if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
                IWL_ERR(mvm, "Firmware error during reconfiguration! Abort.\n");
        } else if (mvm->cur_ucode == IWL_UCODE_REGULAR &&
                   iwlwifi_mod_params.restart_fw) {
                /*
                 * This is a bit racy, but worst case we tell mac80211 about
                 * a stopped/aborted (sched) scan when that was already done
                 * which is not a problem. It is necessary to abort any scan
                 * here because mac80211 requires having the scan cleared
                 * before restarting.
                 * We'll reset the scan_status to NONE in restart cleanup in
                 * the next start() call from mac80211.
                 */
                switch (mvm->scan_status) {
                case IWL_MVM_SCAN_NONE:
                        break;
                case IWL_MVM_SCAN_OS:
                        ieee80211_scan_completed(mvm->hw, true);
                        break;
                }

                ieee80211_restart_hw(mvm->hw);
        }
}

static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
{
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

        iwl_mvm_dump_nic_error_log(mvm);

        iwl_mvm_nic_restart(mvm);
}

static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
{
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

        WARN_ON(1);
        iwl_mvm_nic_restart(mvm);
}

static const struct iwl_op_mode_ops iwl_mvm_ops = {
        .start = iwl_op_mode_mvm_start,
        .stop = iwl_op_mode_mvm_stop,
        .rx = iwl_mvm_rx_dispatch,
        .queue_full = iwl_mvm_stop_sw_queue,
        .queue_not_full = iwl_mvm_wake_sw_queue,
        .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
        .free_skb = iwl_mvm_free_skb,
        .nic_error = iwl_mvm_nic_error,
        .cmd_queue_full = iwl_mvm_cmd_queue_full,
        .nic_config = iwl_mvm_nic_config,
};