main.c

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/******************************************************************************
 *
 * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *
 * 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 LICENSE.
 *
 * Contact Information:
 *  Intel Linux Wireless <[email protected]>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>

#include <net/mac80211.h>

#include <asm/div64.h>

#include "iwl-eeprom-read.h"
#include "iwl-eeprom-parse.h"
#include "iwl-io.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
#include "iwl-drv.h"
#include "iwl-modparams.h"
#include "iwl-prph.h"

#include "dev.h"
#include "calib.h"
#include "agn.h"


/******************************************************************************
 *
 * module boiler plate
 *
 ******************************************************************************/

/*
 * module name, copyright, version, etc.
 */
#define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"

#ifdef CONFIG_IWLWIFI_DEBUG
#define VD "d"
#else
#define VD
#endif

#define DRV_VERSION     IWLWIFI_VERSION VD


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_dvm_ops;

void iwl_update_chain_flags(struct iwl_priv *priv)
{
    struct iwl_rxon_context *ctx;

    for_each_context(priv, ctx) {
        iwlagn_set_rxon_chain(priv, ctx);
        if (ctx->active.rx_chain != ctx->staging.rx_chain)
            iwlagn_commit_rxon(priv, ctx);
    }
}

/* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
static void iwl_set_beacon_tim(struct iwl_priv *priv,
                   struct iwl_tx_beacon_cmd *tx_beacon_cmd,
                   u8 *beacon, u32 frame_size)
{
    u16 tim_idx;
    struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;

    /*
     * The index is relative to frame start but we start looking at the
     * variable-length part of the beacon.
     */
    tim_idx = mgmt->u.beacon.variable - beacon;

    /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
    while ((tim_idx < (frame_size - 2)) &&
            (beacon[tim_idx] != WLAN_EID_TIM))
        tim_idx += beacon[tim_idx+1] + 2;

    /* If TIM field was found, set variables */
    if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
        tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
        tx_beacon_cmd->tim_size = beacon[tim_idx+1];
    } else
        IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
}

int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
{
    struct iwl_tx_beacon_cmd *tx_beacon_cmd;
    struct iwl_host_cmd cmd = {
        .id = REPLY_TX_BEACON,
        .flags = CMD_SYNC,
    };
    struct ieee80211_tx_info *info;
    u32 frame_size;
    u32 rate_flags;
    u32 rate;

    /*
     * We have to set up the TX command, the TX Beacon command, and the
     * beacon contents.
     */

    lockdep_assert_held(&priv->mutex);

    if (!priv->beacon_ctx) {
        IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
        return 0;
    }

    if (WARN_ON(!priv->beacon_skb))
        return -EINVAL;

    /* Allocate beacon command */
    if (!priv->beacon_cmd)
        priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
    tx_beacon_cmd = priv->beacon_cmd;
    if (!tx_beacon_cmd)
        return -ENOMEM;

    frame_size = priv->beacon_skb->len;

    /* Set up TX command fields */
    tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
    tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
    tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
    tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
        TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;

    /* Set up TX beacon command fields */
    iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
               frame_size);

    /* Set up packet rate and flags */
    info = IEEE80211_SKB_CB(priv->beacon_skb);

    /*
     * Let's set up the rate at least somewhat correctly;
     * it will currently not actually be used by the uCode,
     * it uses the broadcast station's rate instead.
     */
    if (info->control.rates[0].idx < 0 ||
        info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
        rate = 0;
    else
        rate = info->control.rates[0].idx;

    priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
                          priv->eeprom_data->valid_tx_ant);
    rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);

    /* In mac80211, rates for 5 GHz start at 0 */
    if (info->band == IEEE80211_BAND_5GHZ)
        rate += IWL_FIRST_OFDM_RATE;
    else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
        rate_flags |= RATE_MCS_CCK_MSK;

    tx_beacon_cmd->tx.rate_n_flags =
            iwl_hw_set_rate_n_flags(rate, rate_flags);

    /* Submit command */
    cmd.len[0] = sizeof(*tx_beacon_cmd);
    cmd.data[0] = tx_beacon_cmd;
    cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
    cmd.len[1] = frame_size;
    cmd.data[1] = priv->beacon_skb->data;
    cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;

    return iwl_dvm_send_cmd(priv, &cmd);
}

static void iwl_bg_beacon_update(struct work_struct *work)
{
    struct iwl_priv *priv =
        container_of(work, struct iwl_priv, beacon_update);
    struct sk_buff *beacon;

    mutex_lock(&priv->mutex);
    if (!priv->beacon_ctx) {
        IWL_ERR(priv, "updating beacon w/o beacon context!\n");
        goto out;
    }

    if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
        /*
         * The ucode will send beacon notifications even in
         * IBSS mode, but we don't want to process them. But
         * we need to defer the type check to here due to
         * requiring locking around the beacon_ctx access.
         */
        goto out;
    }

    /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
    beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
    if (!beacon) {
        IWL_ERR(priv, "update beacon failed -- keeping old\n");
        goto out;
    }

    /* new beacon skb is allocated every time; dispose previous.*/
    dev_kfree_skb(priv->beacon_skb);

    priv->beacon_skb = beacon;

    iwlagn_send_beacon_cmd(priv);
 out:
    mutex_unlock(&priv->mutex);
}

static void iwl_bg_bt_runtime_config(struct work_struct *work)
{
    struct iwl_priv *priv =
        container_of(work, struct iwl_priv, bt_runtime_config);

    if (test_bit(STATUS_EXIT_PENDING, &priv->status))
        return;

    /* dont send host command if rf-kill is on */
    if (!iwl_is_ready_rf(priv))
        return;
    iwlagn_send_advance_bt_config(priv);
}

static void iwl_bg_bt_full_concurrency(struct work_struct *work)
{
    struct iwl_priv *priv =
        container_of(work, struct iwl_priv, bt_full_concurrency);
    struct iwl_rxon_context *ctx;

    mutex_lock(&priv->mutex);

    if (test_bit(STATUS_EXIT_PENDING, &priv->status))
        goto out;

    /* dont send host command if rf-kill is on */
    if (!iwl_is_ready_rf(priv))
        goto out;

    IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
               priv->bt_full_concurrent ?
               "full concurrency" : "3-wire");

    /*
     * LQ & RXON updated cmds must be sent before BT Config cmd
     * to avoid 3-wire collisions
     */
    for_each_context(priv, ctx) {
        iwlagn_set_rxon_chain(priv, ctx);
        iwlagn_commit_rxon(priv, ctx);
    }

    iwlagn_send_advance_bt_config(priv);
out:
    mutex_unlock(&priv->mutex);
}

int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
{
    struct iwl_statistics_cmd statistics_cmd = {
        .configuration_flags =
            clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
    };

    if (flags & CMD_ASYNC)
        return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
                    CMD_ASYNC,
                    sizeof(struct iwl_statistics_cmd),
                    &statistics_cmd);
    else
        return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
                    CMD_SYNC,
                    sizeof(struct iwl_statistics_cmd),
                    &statistics_cmd);
}

static void iwl_bg_statistics_periodic(unsigned long data)
{
    struct iwl_priv *priv = (struct iwl_priv *)data;

    if (test_bit(STATUS_EXIT_PENDING, &priv->status))
        return;

    /* dont send host command if rf-kill is on */
    if (!iwl_is_ready_rf(priv))
        return;

    iwl_send_statistics_request(priv, CMD_ASYNC, false);
}


static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
                    u32 start_idx, u32 num_events,
                    u32 capacity, u32 mode)
{
    u32 i;
    u32 ptr;        /* SRAM byte address of log data */
    u32 ev, time, data; /* event log data */
    unsigned long reg_flags;

    if (mode == 0)
        ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
    else
        ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));

    /* Make sure device is powered up for SRAM reads */
    spin_lock_irqsave(&priv->trans->reg_lock, reg_flags);
    if (unlikely(!iwl_grab_nic_access(priv->trans))) {
        spin_unlock_irqrestore(&priv->trans->reg_lock, reg_flags);
        return;
    }

    /* Set starting address; reads will auto-increment */
    iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, ptr);

    /*
     * Refuse to read more than would have fit into the log from
     * the current start_idx. This used to happen due to the race
     * described below, but now WARN because the code below should
     * prevent it from happening here.
     */
    if (WARN_ON(num_events > capacity - start_idx))
        num_events = capacity - start_idx;

    /*
     * "time" is actually "data" for mode 0 (no timestamp).
     * place event id # at far right for easier visual parsing.
     */
    for (i = 0; i < num_events; i++) {
        ev = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
        time = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
        if (mode == 0) {
            trace_iwlwifi_dev_ucode_cont_event(
                    priv->trans->dev, 0, time, ev);
        } else {
            data = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
            trace_iwlwifi_dev_ucode_cont_event(
                    priv->trans->dev, time, data, ev);
        }
    }
    /* Allow device to power down */
    iwl_release_nic_access(priv->trans);
    spin_unlock_irqrestore(&priv->trans->reg_lock, reg_flags);
}

static void iwl_continuous_event_trace(struct iwl_priv *priv)
{
    u32 capacity;   /* event log capacity in # entries */
    struct {
        u32 capacity;
        u32 mode;
        u32 wrap_counter;
        u32 write_counter;
    } __packed read;
    u32 base;       /* SRAM byte address of event log header */
    u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
    u32 num_wraps;  /* # times uCode wrapped to top of log */
    u32 next_entry; /* index of next entry to be written by uCode */

    base = priv->device_pointers.log_event_table;
    if (iwlagn_hw_valid_rtc_data_addr(base)) {
        iwl_read_targ_mem_bytes(priv->trans, base, &read, sizeof(read));
        capacity = read.capacity;
        mode = read.mode;
        num_wraps = read.wrap_counter;
        next_entry = read.write_counter;
    } else
        return;

    /*
     * Unfortunately, the uCode doesn't use temporary variables.
     * Therefore, it can happen that we read next_entry == capacity,
     * which really means next_entry == 0.
     */
    if (unlikely(next_entry == capacity))
        next_entry = 0;
    /*
     * Additionally, the uCode increases the write pointer before
     * the wraps counter, so if the write pointer is smaller than
     * the old write pointer (wrap occurred) but we read that no
     * wrap occurred, we actually read between the next_entry and
     * num_wraps update (this does happen in practice!!) -- take
     * that into account by increasing num_wraps.
     */
    if (unlikely(next_entry < priv->event_log.next_entry &&
             num_wraps == priv->event_log.num_wraps))
        num_wraps++;

    if (num_wraps == priv->event_log.num_wraps) {
        iwl_print_cont_event_trace(
            priv, base, priv->event_log.next_entry,
            next_entry - priv->event_log.next_entry,
            capacity, mode);

        priv->event_log.non_wraps_count++;
    } else {
        if (num_wraps - priv->event_log.num_wraps > 1)
            priv->event_log.wraps_more_count++;
        else
            priv->event_log.wraps_once_count++;

        trace_iwlwifi_dev_ucode_wrap_event(priv->trans->dev,
                num_wraps - priv->event_log.num_wraps,
                next_entry, priv->event_log.next_entry);

        if (next_entry < priv->event_log.next_entry) {
            iwl_print_cont_event_trace(
                priv, base, priv->event_log.next_entry,
                capacity - priv->event_log.next_entry,
                capacity, mode);

            iwl_print_cont_event_trace(
                priv, base, 0, next_entry, capacity, mode);
        } else {
            iwl_print_cont_event_trace(
                priv, base, next_entry,
                capacity - next_entry,
                capacity, mode);

            iwl_print_cont_event_trace(
                priv, base, 0, next_entry, capacity, mode);
        }
    }

    priv->event_log.num_wraps = num_wraps;
    priv->event_log.next_entry = next_entry;
}

static void iwl_bg_ucode_trace(unsigned long data)
{
    struct iwl_priv *priv = (struct iwl_priv *)data;

    if (test_bit(STATUS_EXIT_PENDING, &priv->status))
        return;

    if (priv->event_log.ucode_trace) {
        iwl_continuous_event_trace(priv);
        /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
        mod_timer(&priv->ucode_trace,
             jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
    }
}

static void iwl_bg_tx_flush(struct work_struct *work)
{
    struct iwl_priv *priv =
        container_of(work, struct iwl_priv, tx_flush);

    if (test_bit(STATUS_EXIT_PENDING, &priv->status))
        return;

    /* do nothing if rf-kill is on */
    if (!iwl_is_ready_rf(priv))
        return;

    IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
    iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
}

/*
 * queue/FIFO/AC mapping definitions
 */

static const u8 iwlagn_bss_ac_to_fifo[] = {
    IWL_TX_FIFO_VO,
    IWL_TX_FIFO_VI,
    IWL_TX_FIFO_BE,
    IWL_TX_FIFO_BK,
};

static const u8 iwlagn_bss_ac_to_queue[] = {
    0, 1, 2, 3,
};

static const u8 iwlagn_pan_ac_to_fifo[] = {
    IWL_TX_FIFO_VO_IPAN,
    IWL_TX_FIFO_VI_IPAN,
    IWL_TX_FIFO_BE_IPAN,
    IWL_TX_FIFO_BK_IPAN,
};

static const u8 iwlagn_pan_ac_to_queue[] = {
    7, 6, 5, 4,
};

static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
{
    int i;

    /*
     * The default context is always valid,
     * the PAN context depends on uCode.
     */
    priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
    if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
        priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);

    for (i = 0; i < NUM_IWL_RXON_CTX; i++)
        priv->contexts[i].ctxid = i;

    priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
    priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
    priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
    priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
    priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
    priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
    priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
    priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
    priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
    priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
        BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_MONITOR);
    priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
        BIT(NL80211_IFTYPE_STATION);
    priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
    priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
    priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
    priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
    memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue,
           iwlagn_bss_ac_to_queue, sizeof(iwlagn_bss_ac_to_queue));
    memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo,
           iwlagn_bss_ac_to_fifo, sizeof(iwlagn_bss_ac_to_fifo));

    priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
    priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
        REPLY_WIPAN_RXON_TIMING;
    priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
        REPLY_WIPAN_RXON_ASSOC;
    priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
    priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
    priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
    priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
    priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
    priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
        BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);

    if (ucode_flags & IWL_UCODE_TLV_FLAGS_P2P)
        priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
            BIT(NL80211_IFTYPE_P2P_CLIENT) |
            BIT(NL80211_IFTYPE_P2P_GO);

    priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
    priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
    priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
    memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue,
           iwlagn_pan_ac_to_queue, sizeof(iwlagn_pan_ac_to_queue));
    memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo,
           iwlagn_pan_ac_to_fifo, sizeof(iwlagn_pan_ac_to_fifo));
    priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;

    BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
}

static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
{
    struct iwl_ct_kill_config cmd;
    struct iwl_ct_kill_throttling_config adv_cmd;
    int ret = 0;

    iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
            CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);

    priv->thermal_throttle.ct_kill_toggle = false;

    if (priv->cfg->base_params->support_ct_kill_exit) {
        adv_cmd.critical_temperature_enter =
            cpu_to_le32(priv->hw_params.ct_kill_threshold);
        adv_cmd.critical_temperature_exit =
            cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);

        ret = iwl_dvm_send_cmd_pdu(priv,
                       REPLY_CT_KILL_CONFIG_CMD,
                       CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
        if (ret)
            IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
        else
            IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
                "succeeded, critical temperature enter is %d,"
                "exit is %d\n",
                priv->hw_params.ct_kill_threshold,
                priv->hw_params.ct_kill_exit_threshold);
    } else {
        cmd.critical_temperature_R =
            cpu_to_le32(priv->hw_params.ct_kill_threshold);

        ret = iwl_dvm_send_cmd_pdu(priv,
                       REPLY_CT_KILL_CONFIG_CMD,
                       CMD_SYNC, sizeof(cmd), &cmd);
        if (ret)
            IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
        else
            IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
                "succeeded, "
                "critical temperature is %d\n",
                priv->hw_params.ct_kill_threshold);
    }
}

static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
{
    struct iwl_calib_cfg_cmd calib_cfg_cmd;
    struct iwl_host_cmd cmd = {
        .id = CALIBRATION_CFG_CMD,
        .len = { sizeof(struct iwl_calib_cfg_cmd), },
        .data = { &calib_cfg_cmd, },
    };

    memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
    calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
    calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);

    return iwl_dvm_send_cmd(priv, &cmd);
}


static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
{
    struct iwl_tx_ant_config_cmd tx_ant_cmd = {
      .valid = cpu_to_le32(valid_tx_ant),
    };

    if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
        IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
        return iwl_dvm_send_cmd_pdu(priv,
                    TX_ANT_CONFIGURATION_CMD,
                    CMD_SYNC,
                    sizeof(struct iwl_tx_ant_config_cmd),
                    &tx_ant_cmd);
    } else {
        IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
        return -EOPNOTSUPP;
    }
}

static void iwl_send_bt_config(struct iwl_priv *priv)
{
    struct iwl_bt_cmd bt_cmd = {
        .lead_time = BT_LEAD_TIME_DEF,
        .max_kill = BT_MAX_KILL_DEF,
        .kill_ack_mask = 0,
        .kill_cts_mask = 0,
    };

    if (!iwlwifi_mod_params.bt_coex_active)
        bt_cmd.flags = BT_COEX_DISABLE;
    else
        bt_cmd.flags = BT_COEX_ENABLE;

    priv->bt_enable_flag = bt_cmd.flags;
    IWL_DEBUG_INFO(priv, "BT coex %s\n",
        (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");

    if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
                 CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
        IWL_ERR(priv, "failed to send BT Coex Config\n");
}

int iwl_alive_start(struct iwl_priv *priv)
{
    int ret = 0;
    struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];

    IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");

    /* After the ALIVE response, we can send host commands to the uCode */
    set_bit(STATUS_ALIVE, &priv->status);

    if (iwl_is_rfkill(priv))
        return -ERFKILL;

    if (priv->event_log.ucode_trace) {
        /* start collecting data now */
        mod_timer(&priv->ucode_trace, jiffies);
    }

    /* download priority table before any calibration request */
    if (priv->cfg->bt_params &&
        priv->cfg->bt_params->advanced_bt_coexist) {
        /* Configure Bluetooth device coexistence support */
        if (priv->cfg->bt_params->bt_sco_disable)
            priv->bt_enable_pspoll = false;
        else
            priv->bt_enable_pspoll = true;

        priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
        priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
        priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
        iwlagn_send_advance_bt_config(priv);
        priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
        priv->cur_rssi_ctx = NULL;

        iwl_send_prio_tbl(priv);

        /* FIXME: w/a to force change uCode BT state machine */
        ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
                     BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
        if (ret)
            return ret;
        ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
                     BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
        if (ret)
            return ret;
    } else {
        /*
         * default is 2-wire BT coexexistence support
         */
        iwl_send_bt_config(priv);
    }

    /*
     * Perform runtime calibrations, including DC calibration.
     */
    iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);

    ieee80211_wake_queues(priv->hw);

    /* Configure Tx antenna selection based on H/W config */
    iwlagn_send_tx_ant_config(priv, priv->eeprom_data->valid_tx_ant);

    if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
        struct iwl_rxon_cmd *active_rxon =
                (struct iwl_rxon_cmd *)&ctx->active;
        /* apply any changes in staging */
        ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
        active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
    } else {
        struct iwl_rxon_context *tmp;
        /* Initialize our rx_config data */
        for_each_context(priv, tmp)
            iwl_connection_init_rx_config(priv, tmp);

        iwlagn_set_rxon_chain(priv, ctx);
    }

    if (!priv->wowlan) {
        /* WoWLAN ucode will not reply in the same way, skip it */
        iwl_reset_run_time_calib(priv);
    }

    set_bit(STATUS_READY, &priv->status);

    /* Configure the adapter for unassociated operation */
    ret = iwlagn_commit_rxon(priv, ctx);
    if (ret)
        return ret;

    /* At this point, the NIC is initialized and operational */
    iwl_rf_kill_ct_config(priv);

    IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");

    return iwl_power_update_mode(priv, true);
}

static void iwl_clear_driver_stations(struct iwl_priv *priv)
{
    struct iwl_rxon_context *ctx;

    spin_lock_bh(&priv->sta_lock);
    memset(priv->stations, 0, sizeof(priv->stations));
    priv->num_stations = 0;

    priv->ucode_key_table = 0;

    for_each_context(priv, ctx) {
        /*
         * Remove all key information that is not stored as part
         * of station information since mac80211 may not have had
         * a chance to remove all the keys. When device is
         * reconfigured by mac80211 after an error all keys will
         * be reconfigured.
         */
        memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
        ctx->key_mapping_keys = 0;
    }

    spin_unlock_bh(&priv->sta_lock);
}

void iwl_down(struct iwl_priv *priv)
{
    int exit_pending;

    IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");

    lockdep_assert_held(&priv->mutex);

    iwl_scan_cancel_timeout(priv, 200);

    /*
     * If active, scanning won't cancel it, so say it expired.
     * No race since we hold the mutex here and a new one
     * can't come in at this time.
     */
    if (priv->ucode_loaded && priv->cur_ucode != IWL_UCODE_INIT)
        ieee80211_remain_on_channel_expired(priv->hw);

    exit_pending =
        test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);

    iwl_clear_ucode_stations(priv, NULL);
    iwl_dealloc_bcast_stations(priv);
    iwl_clear_driver_stations(priv);

    /* reset BT coex data */
    priv->bt_status = 0;
    priv->cur_rssi_ctx = NULL;
    priv->bt_is_sco = 0;
    if (priv->cfg->bt_params)
        priv->bt_traffic_load =
             priv->cfg->bt_params->bt_init_traffic_load;
    else
        priv->bt_traffic_load = 0;
    priv->bt_full_concurrent = false;
    priv->bt_ci_compliance = 0;

    /* Wipe out the EXIT_PENDING status bit if we are not actually
     * exiting the module */
    if (!exit_pending)
        clear_bit(STATUS_EXIT_PENDING, &priv->status);

    if (priv->mac80211_registered)
        ieee80211_stop_queues(priv->hw);

    priv->ucode_loaded = false;
    iwl_trans_stop_device(priv->trans);

    /* Set num_aux_in_flight must be done after the transport is stopped */
    atomic_set(&priv->num_aux_in_flight, 0);

    /* Clear out all status bits but a few that are stable across reset */
    priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
                STATUS_RF_KILL_HW |
            test_bit(STATUS_FW_ERROR, &priv->status) <<
                STATUS_FW_ERROR |
            test_bit(STATUS_EXIT_PENDING, &priv->status) <<
                STATUS_EXIT_PENDING;

    dev_kfree_skb(priv->beacon_skb);
    priv->beacon_skb = NULL;
}

/*****************************************************************************
 *
 * Workqueue callbacks
 *
 *****************************************************************************/

static void iwl_bg_run_time_calib_work(struct work_struct *work)
{
    struct iwl_priv *priv = container_of(work, struct iwl_priv,
            run_time_calib_work);

    mutex_lock(&priv->mutex);

    if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
        test_bit(STATUS_SCANNING, &priv->status)) {
        mutex_unlock(&priv->mutex);
        return;
    }

    if (priv->start_calib) {
        iwl_chain_noise_calibration(priv);
        iwl_sensitivity_calibration(priv);
    }

    mutex_unlock(&priv->mutex);
}

void iwlagn_prepare_restart(struct iwl_priv *priv)
{
    bool bt_full_concurrent;
    u8 bt_ci_compliance;
    u8 bt_load;
    u8 bt_status;
    bool bt_is_sco;
    int i;

    lockdep_assert_held(&priv->mutex);

    priv->is_open = 0;

    /*
     * __iwl_down() will clear the BT status variables,
     * which is correct, but when we restart we really
     * want to keep them so restore them afterwards.
     *
     * The restart process will later pick them up and
     * re-configure the hw when we reconfigure the BT
     * command.
     */
    bt_full_concurrent = priv->bt_full_concurrent;
    bt_ci_compliance = priv->bt_ci_compliance;
    bt_load = priv->bt_traffic_load;
    bt_status = priv->bt_status;
    bt_is_sco = priv->bt_is_sco;

    iwl_down(priv);

    priv->bt_full_concurrent = bt_full_concurrent;
    priv->bt_ci_compliance = bt_ci_compliance;
    priv->bt_traffic_load = bt_load;
    priv->bt_status = bt_status;
    priv->bt_is_sco = bt_is_sco;

    /* reset aggregation queues */
    for (i = IWLAGN_FIRST_AMPDU_QUEUE; i < IWL_MAX_HW_QUEUES; i++)
        priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
    /* and stop counts */
    for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
        atomic_set(&priv->queue_stop_count[i], 0);

    memset(priv->agg_q_alloc, 0, sizeof(priv->agg_q_alloc));
}

static void iwl_bg_restart(struct work_struct *data)
{
    struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);

    if (test_bit(STATUS_EXIT_PENDING, &priv->status))
        return;

    if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
        mutex_lock(&priv->mutex);
        iwlagn_prepare_restart(priv);
        mutex_unlock(&priv->mutex);
        iwl_cancel_deferred_work(priv);
        if (priv->mac80211_registered)
            ieee80211_restart_hw(priv->hw);
        else
            IWL_ERR(priv,
                "Cannot request restart before registrating with mac80211");
    } else {
        WARN_ON(1);
    }
}




void iwlagn_disable_roc(struct iwl_priv *priv)
{
    struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];

    lockdep_assert_held(&priv->mutex);

    if (!priv->hw_roc_setup)
        return;

    ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
    ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;

    priv->hw_roc_channel = NULL;

    memset(ctx->staging.node_addr, 0, ETH_ALEN);

    iwlagn_commit_rxon(priv, ctx);

    ctx->is_active = false;
    priv->hw_roc_setup = false;
}

static void iwlagn_disable_roc_work(struct work_struct *work)
{
    struct iwl_priv *priv = container_of(work, struct iwl_priv,
                         hw_roc_disable_work.work);

    mutex_lock(&priv->mutex);
    iwlagn_disable_roc(priv);
    mutex_unlock(&priv->mutex);
}

/*****************************************************************************
 *
 * driver setup and teardown
 *
 *****************************************************************************/

static void iwl_setup_deferred_work(struct iwl_priv *priv)
{
    priv->workqueue = create_singlethread_workqueue(DRV_NAME);

    INIT_WORK(&priv->restart, iwl_bg_restart);
    INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
    INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
    INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
    INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
    INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
    INIT_DELAYED_WORK(&priv->hw_roc_disable_work,
              iwlagn_disable_roc_work);

    iwl_setup_scan_deferred_work(priv);

    if (priv->cfg->bt_params)
        iwlagn_bt_setup_deferred_work(priv);

    init_timer(&priv->statistics_periodic);
    priv->statistics_periodic.data = (unsigned long)priv;
    priv->statistics_periodic.function = iwl_bg_statistics_periodic;

    init_timer(&priv->ucode_trace);
    priv->ucode_trace.data = (unsigned long)priv;
    priv->ucode_trace.function = iwl_bg_ucode_trace;
}

void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
    if (priv->cfg->bt_params)
        iwlagn_bt_cancel_deferred_work(priv);

    cancel_work_sync(&priv->run_time_calib_work);
    cancel_work_sync(&priv->beacon_update);

    iwl_cancel_scan_deferred_work(priv);

    cancel_work_sync(&priv->bt_full_concurrency);
    cancel_work_sync(&priv->bt_runtime_config);
    cancel_delayed_work_sync(&priv->hw_roc_disable_work);

    del_timer_sync(&priv->statistics_periodic);
    del_timer_sync(&priv->ucode_trace);
}

static int iwl_init_drv(struct iwl_priv *priv)
{
    spin_lock_init(&priv->sta_lock);

    mutex_init(&priv->mutex);

    INIT_LIST_HEAD(&priv->calib_results);

    priv->band = IEEE80211_BAND_2GHZ;

    priv->plcp_delta_threshold =
        priv->cfg->base_params->plcp_delta_threshold;

    priv->iw_mode = NL80211_IFTYPE_STATION;
    priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
    priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
    priv->agg_tids_count = 0;

    priv->ucode_owner = IWL_OWNERSHIP_DRIVER;

    priv->rx_statistics_jiffies = jiffies;

    /* Choose which receivers/antennas to use */
    iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);

    iwl_init_scan_params(priv);

    /* init bt coex */
    if (priv->cfg->bt_params &&
        priv->cfg->bt_params->advanced_bt_coexist) {
        priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
        priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
        priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
        priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
        priv->bt_duration = BT_DURATION_LIMIT_DEF;
        priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
    }

    return 0;
}

static void iwl_uninit_drv(struct iwl_priv *priv)
{
    kfree(priv->scan_cmd);
    kfree(priv->beacon_cmd);
    kfree(rcu_dereference_raw(priv->noa_data));
    iwl_calib_free_results(priv);
#ifdef CONFIG_IWLWIFI_DEBUGFS
    kfree(priv->wowlan_sram);
#endif
}

static void iwl_set_hw_params(struct iwl_priv *priv)
{
    if (priv->cfg->ht_params)
        priv->hw_params.use_rts_for_aggregation =
            priv->cfg->ht_params->use_rts_for_aggregation;

    /* Device-specific setup */
    priv->lib->set_hw_params(priv);
}



/* show what optional capabilities we have */
static void iwl_option_config(struct iwl_priv *priv)
{
#ifdef CONFIG_IWLWIFI_DEBUG
    IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG enabled\n");
#else
    IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG disabled\n");
#endif

#ifdef CONFIG_IWLWIFI_DEBUGFS
    IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS enabled\n");
#else
    IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS disabled\n");
#endif

#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
    IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING enabled\n");
#else
    IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING disabled\n");
#endif

#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
    IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TESTMODE enabled\n");
#else
    IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TESTMODE disabled\n");
#endif

#ifdef CONFIG_IWLWIFI_P2P
    IWL_INFO(priv, "CONFIG_IWLWIFI_P2P enabled\n");
#else
    IWL_INFO(priv, "CONFIG_IWLWIFI_P2P disabled\n");
#endif
}

static int iwl_eeprom_init_hw_params(struct iwl_priv *priv)
{
    u16 radio_cfg;

    priv->eeprom_data->sku = priv->eeprom_data->sku;

    if (priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE &&
        !priv->cfg->ht_params) {
        IWL_ERR(priv, "Invalid 11n configuration\n");
        return -EINVAL;
    }

    if (!priv->eeprom_data->sku) {
        IWL_ERR(priv, "Invalid device sku\n");
        return -EINVAL;
    }

    IWL_INFO(priv, "Device SKU: 0x%X\n", priv->eeprom_data->sku);

    radio_cfg = priv->eeprom_data->radio_cfg;

    priv->hw_params.tx_chains_num =
        num_of_ant(priv->eeprom_data->valid_tx_ant);
    if (priv->cfg->rx_with_siso_diversity)
        priv->hw_params.rx_chains_num = 1;
    else
        priv->hw_params.rx_chains_num =
            num_of_ant(priv->eeprom_data->valid_rx_ant);

    IWL_INFO(priv, "Valid Tx ant: 0x%X, Valid Rx ant: 0x%X\n",
         priv->eeprom_data->valid_tx_ant,
         priv->eeprom_data->valid_rx_ant);

    return 0;
}

static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
                         const struct iwl_cfg *cfg,
                         const struct iwl_fw *fw,
                         struct dentry *dbgfs_dir)
{
    struct iwl_priv *priv;
    struct ieee80211_hw *hw;
    struct iwl_op_mode *op_mode;
    u16 num_mac;
    u32 ucode_flags;
    struct iwl_trans_config trans_cfg;
    static const u8 no_reclaim_cmds[] = {
        REPLY_RX_PHY_CMD,
        REPLY_RX_MPDU_CMD,
        REPLY_COMPRESSED_BA,
        STATISTICS_NOTIFICATION,
        REPLY_TX,
    };
    int i;

    /************************
     * 1. Allocating HW data
     ************************/
    hw = iwl_alloc_all();
    if (!hw) {
        pr_err("%s: Cannot allocate network device\n", cfg->name);
        goto out;
    }

    op_mode = hw->priv;
    op_mode->ops = &iwl_dvm_ops;
    priv = IWL_OP_MODE_GET_DVM(op_mode);
    priv->trans = trans;
    priv->dev = trans->dev;
    priv->cfg = cfg;
    priv->fw = fw;

    switch (priv->cfg->device_family) {
    case IWL_DEVICE_FAMILY_1000:
    case IWL_DEVICE_FAMILY_100:
        priv->lib = &iwl1000_lib;
        break;
    case IWL_DEVICE_FAMILY_2000:
    case IWL_DEVICE_FAMILY_105:
        priv->lib = &iwl2000_lib;
        break;
    case IWL_DEVICE_FAMILY_2030:
    case IWL_DEVICE_FAMILY_135:
        priv->lib = &iwl2030_lib;
        break;
    case IWL_DEVICE_FAMILY_5000:
        priv->lib = &iwl5000_lib;
        break;
    case IWL_DEVICE_FAMILY_5150:
        priv->lib = &iwl5150_lib;
        break;
    case IWL_DEVICE_FAMILY_6000:
    case IWL_DEVICE_FAMILY_6005:
    case IWL_DEVICE_FAMILY_6000i:
    case IWL_DEVICE_FAMILY_6050:
    case IWL_DEVICE_FAMILY_6150:
        priv->lib = &iwl6000_lib;
        break;
    case IWL_DEVICE_FAMILY_6030:
        priv->lib = &iwl6030_lib;
        break;
    default:
        break;
    }

    if (WARN_ON(!priv->lib))
        goto out_free_hw;

    /*
     * 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 (!iwlwifi_mod_params.wd_disable)
        trans_cfg.queue_watchdog_timeout =
            priv->cfg->base_params->wd_timeout;
    else
        trans_cfg.queue_watchdog_timeout = IWL_WATCHDOG_DISABLED;
    trans_cfg.command_names = iwl_dvm_cmd_strings;
    trans_cfg.cmd_fifo = IWLAGN_CMD_FIFO_NUM;

    WARN_ON(sizeof(priv->transport_queue_stop) * BITS_PER_BYTE <
        priv->cfg->base_params->num_of_queues);

    ucode_flags = fw->ucode_capa.flags;

#ifndef CONFIG_IWLWIFI_P2P
    ucode_flags &= ~IWL_UCODE_TLV_FLAGS_P2P;
#endif

    if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
        priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
        trans_cfg.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
    } else {
        priv->sta_key_max_num = STA_KEY_MAX_NUM;
        trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
    }

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

    /* At this point both hw and priv are allocated. */

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

    iwl_option_config(priv);

    IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");

    /* is antenna coupling more than 35dB ? */
    priv->bt_ant_couple_ok =
        (iwlwifi_mod_params.ant_coupling >
            IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
            true : false;

    /* enable/disable bt channel inhibition */
    priv->bt_ch_announce = iwlwifi_mod_params.bt_ch_announce;
    IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
               (priv->bt_ch_announce) ? "On" : "Off");

    /* these spin locks will be used in apm_ops.init and EEPROM access
     * we should init now
     */
    spin_lock_init(&priv->statistics.lock);

    /***********************
     * 2. Read REV register
     ***********************/
    IWL_INFO(priv, "Detected %s, REV=0x%X\n",
        priv->cfg->name, priv->trans->hw_rev);

    if (iwl_trans_start_hw(priv->trans))
        goto out_free_hw;

    /* Read the EEPROM */
    if (iwl_read_eeprom(priv->trans, &priv->eeprom_blob,
                &priv->eeprom_blob_size)) {
        IWL_ERR(priv, "Unable to init EEPROM\n");
        goto out_free_hw;
    }

    /* Reset chip to save power until we load uCode during "up". */
    iwl_trans_stop_hw(priv->trans, false);

    priv->eeprom_data = iwl_parse_eeprom_data(priv->trans->dev, priv->cfg,
                          priv->eeprom_blob,
                          priv->eeprom_blob_size);
    if (!priv->eeprom_data)
        goto out_free_eeprom_blob;

    if (iwl_eeprom_check_version(priv->eeprom_data, priv->trans))
        goto out_free_eeprom;

    if (iwl_eeprom_init_hw_params(priv))
        goto out_free_eeprom;

    /* extract MAC Address */
    memcpy(priv->addresses[0].addr, priv->eeprom_data->hw_addr, ETH_ALEN);
    IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
    priv->hw->wiphy->addresses = priv->addresses;
    priv->hw->wiphy->n_addresses = 1;
    num_mac = priv->eeprom_data->n_hw_addrs;
    if (num_mac > 1) {
        memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
               ETH_ALEN);
        priv->addresses[1].addr[5]++;
        priv->hw->wiphy->n_addresses++;
    }

    /************************
     * 4. Setup HW constants
     ************************/
    iwl_set_hw_params(priv);

    if (!(priv->eeprom_data->sku & EEPROM_SKU_CAP_IPAN_ENABLE)) {
        IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN");
        ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
        /*
         * if not PAN, then don't support P2P -- might be a uCode
         * packaging bug or due to the eeprom check above
         */
        ucode_flags &= ~IWL_UCODE_TLV_FLAGS_P2P;
        priv->sta_key_max_num = STA_KEY_MAX_NUM;
        trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;

        /* Configure transport layer again*/
        iwl_trans_configure(priv->trans, &trans_cfg);
    }

    /*******************
     * 5. Setup priv
     *******************/
    for (i = 0; i < IWL_MAX_HW_QUEUES; i++) {
        priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
        if (i < IWLAGN_FIRST_AMPDU_QUEUE &&
            i != IWL_DEFAULT_CMD_QUEUE_NUM &&
            i != IWL_IPAN_CMD_QUEUE_NUM)
            priv->queue_to_mac80211[i] = i;
        atomic_set(&priv->queue_stop_count[i], 0);
    }

    if (iwl_init_drv(priv))
        goto out_free_eeprom;

    /* At this point both hw and priv are initialized. */

    /********************
     * 6. Setup services
     ********************/
    iwl_setup_deferred_work(priv);
    iwl_setup_rx_handlers(priv);
    iwl_testmode_init(priv);

    iwl_power_initialize(priv);
    iwl_tt_initialize(priv);

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

    priv->new_scan_threshold_behaviour =
        !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);

    priv->phy_calib_chain_noise_reset_cmd =
        fw->ucode_capa.standard_phy_calibration_size;
    priv->phy_calib_chain_noise_gain_cmd =
        fw->ucode_capa.standard_phy_calibration_size + 1;

    /* initialize all valid contexts */
    iwl_init_context(priv, ucode_flags);

    /**************************************************
     * This is still part of probe() in a sense...
     *
     * 7. Setup and register with mac80211 and debugfs
     **************************************************/
    if (iwlagn_mac_setup_register(priv, &fw->ucode_capa))
        goto out_destroy_workqueue;

    if (iwl_dbgfs_register(priv, dbgfs_dir))
        goto out_mac80211_unregister;

    return op_mode;

out_mac80211_unregister:
    iwlagn_mac_unregister(priv);
out_destroy_workqueue:
    iwl_tt_exit(priv);
    iwl_testmode_free(priv);
    iwl_cancel_deferred_work(priv);
    destroy_workqueue(priv->workqueue);
    priv->workqueue = NULL;
    iwl_uninit_drv(priv);
out_free_eeprom_blob:
    kfree(priv->eeprom_blob);
out_free_eeprom:
    iwl_free_eeprom_data(priv->eeprom_data);
out_free_hw:
    ieee80211_free_hw(priv->hw);
out:
    op_mode = NULL;
    return op_mode;
}

static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

    IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");

    iwl_testmode_free(priv);
    iwlagn_mac_unregister(priv);

    iwl_tt_exit(priv);

    /*This will stop the queues, move the device to low power state */
    priv->ucode_loaded = false;
    iwl_trans_stop_device(priv->trans);

    kfree(priv->eeprom_blob);
    iwl_free_eeprom_data(priv->eeprom_data);

    /*netif_stop_queue(dev); */
    flush_workqueue(priv->workqueue);

    /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
     * priv->workqueue... so we can't take down the workqueue
     * until now... */
    destroy_workqueue(priv->workqueue);
    priv->workqueue = NULL;

    iwl_uninit_drv(priv);

    dev_kfree_skb(priv->beacon_skb);

    iwl_trans_stop_hw(priv->trans, true);
    ieee80211_free_hw(priv->hw);
}

static const char * const desc_lookup_text[] = {
    "OK",
    "FAIL",
    "BAD_PARAM",
    "BAD_CHECKSUM",
    "NMI_INTERRUPT_WDG",
    "SYSASSERT",
    "FATAL_ERROR",
    "BAD_COMMAND",
    "HW_ERROR_TUNE_LOCK",
    "HW_ERROR_TEMPERATURE",
    "ILLEGAL_CHAN_FREQ",
    "VCC_NOT_STABLE",
    "FH_ERROR",
    "NMI_INTERRUPT_HOST",
    "NMI_INTERRUPT_ACTION_PT",
    "NMI_INTERRUPT_UNKNOWN",
    "UCODE_VERSION_MISMATCH",
    "HW_ERROR_ABS_LOCK",
    "HW_ERROR_CAL_LOCK_FAIL",
    "NMI_INTERRUPT_INST_ACTION_PT",
    "NMI_INTERRUPT_DATA_ACTION_PT",
    "NMI_TRM_HW_ER",
    "NMI_INTERRUPT_TRM",
    "NMI_INTERRUPT_BREAK_POINT",
    "DEBUG_0",
    "DEBUG_1",
    "DEBUG_2",
    "DEBUG_3",
};

static struct { char *name; u8 num; } advanced_lookup[] = {
    { "NMI_INTERRUPT_WDG", 0x34 },
    { "SYSASSERT", 0x35 },
    { "UCODE_VERSION_MISMATCH", 0x37 },
    { "BAD_COMMAND", 0x38 },
    { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
    { "FATAL_ERROR", 0x3D },
    { "NMI_TRM_HW_ERR", 0x46 },
    { "NMI_INTERRUPT_TRM", 0x4C },
    { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
    { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
    { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
    { "NMI_INTERRUPT_HOST", 0x66 },
    { "NMI_INTERRUPT_ACTION_PT", 0x7C },
    { "NMI_INTERRUPT_UNKNOWN", 0x84 },
    { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
    { "ADVANCED_SYSASSERT", 0 },
};

static const char *desc_lookup(u32 num)
{
    int i;
    int max = ARRAY_SIZE(desc_lookup_text);

    if (num < max)
        return desc_lookup_text[num];

    max = ARRAY_SIZE(advanced_lookup) - 1;
    for (i = 0; i < max; i++) {
        if (advanced_lookup[i].num == num)
            break;
    }
    return advanced_lookup[i].name;
}

#define ERROR_START_OFFSET  (1 * sizeof(u32))
#define ERROR_ELEM_SIZE     (7 * sizeof(u32))

static void iwl_dump_nic_error_log(struct iwl_priv *priv)
{
    struct iwl_trans *trans = priv->trans;
    u32 base;
    struct iwl_error_event_table table;

    base = priv->device_pointers.error_event_table;
    if (priv->cur_ucode == IWL_UCODE_INIT) {
        if (!base)
            base = priv->fw->init_errlog_ptr;
    } else {
        if (!base)
            base = priv->fw->inst_errlog_ptr;
    }

    if (!iwlagn_hw_valid_rtc_data_addr(base)) {
        IWL_ERR(priv,
            "Not valid error log pointer 0x%08X for %s uCode\n",
            base,
            (priv->cur_ucode == IWL_UCODE_INIT)
                    ? "Init" : "RT");
        return;
    }

    /*TODO: Update dbgfs with ISR error stats obtained below */
    iwl_read_targ_mem_bytes(trans, base, &table, sizeof(table));

    if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
        IWL_ERR(trans, "Start IWL Error Log Dump:\n");
        IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
            priv->status, table.valid);
    }

    trace_iwlwifi_dev_ucode_error(trans->dev, table.error_id, table.tsf_low,
                      table.data1, table.data2, table.line,
                      table.blink1, table.blink2, table.ilink1,
                      table.ilink2, table.bcon_time, table.gp1,
                      table.gp2, table.gp3, table.ucode_ver,
                      table.hw_ver, table.brd_ver);
    IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
        desc_lookup(table.error_id));
    IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
    IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
    IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
    IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
    IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
    IWL_ERR(priv, "0x%08X | data1\n", table.data1);
    IWL_ERR(priv, "0x%08X | data2\n", table.data2);
    IWL_ERR(priv, "0x%08X | line\n", table.line);
    IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
    IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
    IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
    IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
    IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
    IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
    IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
    IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
    IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
    IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
    IWL_ERR(priv, "0x%08X | isr0\n", table.isr0);
    IWL_ERR(priv, "0x%08X | isr1\n", table.isr1);
    IWL_ERR(priv, "0x%08X | isr2\n", table.isr2);
    IWL_ERR(priv, "0x%08X | isr3\n", table.isr3);
    IWL_ERR(priv, "0x%08X | isr4\n", table.isr4);
    IWL_ERR(priv, "0x%08X | isr_pref\n", table.isr_pref);
    IWL_ERR(priv, "0x%08X | wait_event\n", table.wait_event);
    IWL_ERR(priv, "0x%08X | l2p_control\n", table.l2p_control);
    IWL_ERR(priv, "0x%08X | l2p_duration\n", table.l2p_duration);
    IWL_ERR(priv, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
    IWL_ERR(priv, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
    IWL_ERR(priv, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
    IWL_ERR(priv, "0x%08X | timestamp\n", table.u_timestamp);
    IWL_ERR(priv, "0x%08X | flow_handler\n", table.flow_handler);
}

#define EVENT_START_OFFSET  (4 * sizeof(u32))

static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
                   u32 num_events, u32 mode,
                   int pos, char **buf, size_t bufsz)
{
    u32 i;
    u32 base;       /* SRAM byte address of event log header */
    u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
    u32 ptr;        /* SRAM byte address of log data */
    u32 ev, time, data; /* event log data */
    unsigned long reg_flags;

    struct iwl_trans *trans = priv->trans;

    if (num_events == 0)
        return pos;

    base = priv->device_pointers.log_event_table;
    if (priv->cur_ucode == IWL_UCODE_INIT) {
        if (!base)
            base = priv->fw->init_evtlog_ptr;
    } else {
        if (!base)
            base = priv->fw->inst_evtlog_ptr;
    }

    if (mode == 0)
        event_size = 2 * sizeof(u32);
    else
        event_size = 3 * sizeof(u32);

    ptr = base + EVENT_START_OFFSET + (start_idx * event_size);

    /* Make sure device is powered up for SRAM reads */
    spin_lock_irqsave(&trans->reg_lock, reg_flags);
    if (unlikely(!iwl_grab_nic_access(trans)))
        goto out_unlock;

    /* Set starting address; reads will auto-increment */
    iwl_write32(trans, HBUS_TARG_MEM_RADDR, ptr);

    /* "time" is actually "data" for mode 0 (no timestamp).
    * place event id # at far right for easier visual parsing. */
    for (i = 0; i < num_events; i++) {
        ev = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
        time = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
        if (mode == 0) {
            /* data, ev */
            if (bufsz) {
                pos += scnprintf(*buf + pos, bufsz - pos,
                        "EVT_LOG:0x%08x:%04u\n",
                        time, ev);
            } else {
                trace_iwlwifi_dev_ucode_event(trans->dev, 0,
                    time, ev);
                IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
                    time, ev);
            }
        } else {
            data = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
            if (bufsz) {
                pos += scnprintf(*buf + pos, bufsz - pos,
                        "EVT_LOGT:%010u:0x%08x:%04u\n",
                         time, data, ev);
            } else {
                IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
                    time, data, ev);
                trace_iwlwifi_dev_ucode_event(trans->dev, time,
                    data, ev);
            }
        }
    }

    /* Allow device to power down */
    iwl_release_nic_access(trans);
out_unlock:
    spin_unlock_irqrestore(&trans->reg_lock, reg_flags);
    return pos;
}

static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
                    u32 num_wraps, u32 next_entry,
                    u32 size, u32 mode,
                    int pos, char **buf, size_t bufsz)
{
    /*
     * display the newest DEFAULT_LOG_ENTRIES entries
     * i.e the entries just before the next ont that uCode would fill.
     */
    if (num_wraps) {
        if (next_entry < size) {
            pos = iwl_print_event_log(priv,
                        capacity - (size - next_entry),
                        size - next_entry, mode,
                        pos, buf, bufsz);
            pos = iwl_print_event_log(priv, 0,
                          next_entry, mode,
                          pos, buf, bufsz);
        } else
            pos = iwl_print_event_log(priv, next_entry - size,
                          size, mode, pos, buf, bufsz);
    } else {
        if (next_entry < size) {
            pos = iwl_print_event_log(priv, 0, next_entry,
                          mode, pos, buf, bufsz);
        } else {
            pos = iwl_print_event_log(priv, next_entry - size,
                          size, mode, pos, buf, bufsz);
        }
    }
    return pos;
}

#define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)

int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
                char **buf, bool display)
{
    u32 base;       /* SRAM byte address of event log header */
    u32 capacity;   /* event log capacity in # entries */
    u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
    u32 num_wraps;  /* # times uCode wrapped to top of log */
    u32 next_entry; /* index of next entry to be written by uCode */
    u32 size;       /* # entries that we'll print */
    u32 logsize;
    int pos = 0;
    size_t bufsz = 0;
    struct iwl_trans *trans = priv->trans;

    base = priv->device_pointers.log_event_table;
    if (priv->cur_ucode == IWL_UCODE_INIT) {
        logsize = priv->fw->init_evtlog_size;
        if (!base)
            base = priv->fw->init_evtlog_ptr;
    } else {
        logsize = priv->fw->inst_evtlog_size;
        if (!base)
            base = priv->fw->inst_evtlog_ptr;
    }

    if (!iwlagn_hw_valid_rtc_data_addr(base)) {
        IWL_ERR(priv,
            "Invalid event log pointer 0x%08X for %s uCode\n",
            base,
            (priv->cur_ucode == IWL_UCODE_INIT)
                    ? "Init" : "RT");
        return -EINVAL;
    }

    /* event log header */
    capacity = iwl_read_targ_mem(trans, base);
    mode = iwl_read_targ_mem(trans, base + (1 * sizeof(u32)));
    num_wraps = iwl_read_targ_mem(trans, base + (2 * sizeof(u32)));
    next_entry = iwl_read_targ_mem(trans, base + (3 * sizeof(u32)));

    if (capacity > logsize) {
        IWL_ERR(priv, "Log capacity %d is bogus, limit to %d "
            "entries\n", capacity, logsize);
        capacity = logsize;
    }

    if (next_entry > logsize) {
        IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
            next_entry, logsize);
        next_entry = logsize;
    }

    size = num_wraps ? capacity : next_entry;

    /* bail out if nothing in log */
    if (size == 0) {
        IWL_ERR(trans, "Start IWL Event Log Dump: nothing in log\n");
        return pos;
    }

#ifdef CONFIG_IWLWIFI_DEBUG
    if (!(iwl_have_debug_level(IWL_DL_FW_ERRORS)) && !full_log)
        size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
            ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
#else
    size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
        ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
#endif
    IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
        size);

#ifdef CONFIG_IWLWIFI_DEBUG
    if (display) {
        if (full_log)
            bufsz = capacity * 48;
        else
            bufsz = size * 48;
        *buf = kmalloc(bufsz, GFP_KERNEL);
        if (!*buf)
            return -ENOMEM;
    }
    if (iwl_have_debug_level(IWL_DL_FW_ERRORS) || full_log) {
        /*
         * if uCode has wrapped back to top of log,
         * start at the oldest entry,
         * i.e the next one that uCode would fill.
         */
        if (num_wraps)
            pos = iwl_print_event_log(priv, next_entry,
                        capacity - next_entry, mode,
                        pos, buf, bufsz);
        /* (then/else) start at top of log */
        pos = iwl_print_event_log(priv, 0,
                      next_entry, mode, pos, buf, bufsz);
    } else
        pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
                        next_entry, size, mode,
                        pos, buf, bufsz);
#else
    pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
                    next_entry, size, mode,
                    pos, buf, bufsz);
#endif
    return pos;
}

static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
{
    unsigned int reload_msec;
    unsigned long reload_jiffies;

#ifdef CONFIG_IWLWIFI_DEBUG
    if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
        iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
#endif

    /* uCode is no longer loaded. */
    priv->ucode_loaded = false;

    /* Set the FW error flag -- cleared on iwl_down */
    set_bit(STATUS_FW_ERROR, &priv->status);

    iwl_abort_notification_waits(&priv->notif_wait);

    /* Keep the restart process from trying to send host
     * commands by clearing the ready bit */
    clear_bit(STATUS_READY, &priv->status);

    wake_up(&priv->trans->wait_command_queue);

    if (!ondemand) {
        /*
         * If firmware keep reloading, then it indicate something
         * serious wrong and firmware having problem to recover
         * from it. Instead of keep trying which will fill the syslog
         * and hang the system, let's just stop it
         */
        reload_jiffies = jiffies;
        reload_msec = jiffies_to_msecs((long) reload_jiffies -
                    (long) priv->reload_jiffies);
        priv->reload_jiffies = reload_jiffies;
        if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
            priv->reload_count++;
            if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
                IWL_ERR(priv, "BUG_ON, Stop restarting\n");
                return;
            }
        } else
            priv->reload_count = 0;
    }

    if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
        if (iwlwifi_mod_params.restart_fw) {
            IWL_DEBUG_FW_ERRORS(priv,
                  "Restarting adapter due to uCode error.\n");
            queue_work(priv->workqueue, &priv->restart);
        } else
            IWL_DEBUG_FW_ERRORS(priv,
                  "Detected FW error, but not restarting\n");
    }
}

static void iwl_nic_error(struct iwl_op_mode *op_mode)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

    IWL_ERR(priv, "Loaded firmware version: %s\n",
        priv->fw->fw_version);

    iwl_dump_nic_error_log(priv);
    iwl_dump_nic_event_log(priv, false, NULL, false);

    iwlagn_fw_error(priv, false);
}

static void iwl_cmd_queue_full(struct iwl_op_mode *op_mode)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

    if (!iwl_check_for_ct_kill(priv)) {
        IWL_ERR(priv, "Restarting adapter queue is full\n");
        iwlagn_fw_error(priv, false);
    }
}

#define EEPROM_RF_CONFIG_TYPE_MAX      0x3

static void iwl_nic_config(struct iwl_op_mode *op_mode)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
    u16 radio_cfg = priv->eeprom_data->radio_cfg;

    /* SKU Control */
    iwl_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
              CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
              CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP,
              (CSR_HW_REV_STEP(priv->trans->hw_rev) <<
                CSR_HW_IF_CONFIG_REG_POS_MAC_STEP) |
              (CSR_HW_REV_DASH(priv->trans->hw_rev) <<
                CSR_HW_IF_CONFIG_REG_POS_MAC_DASH));

    /* write radio config values to register */
    if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) <= EEPROM_RF_CONFIG_TYPE_MAX) {
        u32 reg_val =
            EEPROM_RF_CFG_TYPE_MSK(radio_cfg) <<
                CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE |
            EEPROM_RF_CFG_STEP_MSK(radio_cfg) <<
                CSR_HW_IF_CONFIG_REG_POS_PHY_STEP |
            EEPROM_RF_CFG_DASH_MSK(radio_cfg) <<
                CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;

        iwl_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
                  CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
                  CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
                  CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH, reg_val);

        IWL_INFO(priv, "Radio type=0x%x-0x%x-0x%x\n",
             EEPROM_RF_CFG_TYPE_MSK(radio_cfg),
             EEPROM_RF_CFG_STEP_MSK(radio_cfg),
             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
    } else {
        WARN_ON(1);
    }

    /* set CSR_HW_CONFIG_REG for uCode use */
    iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
            CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
            CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);

    /* 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(priv->trans, APMG_PS_CTRL_REG,
                   APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
                   ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);

    if (priv->lib->nic_config)
        priv->lib->nic_config(priv);
}

static void iwl_wimax_active(struct iwl_op_mode *op_mode)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

    clear_bit(STATUS_READY, &priv->status);
    IWL_ERR(priv, "RF is used by WiMAX\n");
}

static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
    int mq = priv->queue_to_mac80211[queue];

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

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

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

static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
    int mq = priv->queue_to_mac80211[queue];

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

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

    clear_bit(mq, &priv->transport_queue_stop);

    if (!priv->passive_no_rx)
        ieee80211_wake_queue(priv->hw, mq);
}

void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
{
    int mq;

    if (!priv->passive_no_rx)
        return;

    for (mq = 0; mq < IWLAGN_FIRST_AMPDU_QUEUE; mq++) {
        if (!test_bit(mq, &priv->transport_queue_stop)) {
            IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d", mq);
            ieee80211_wake_queue(priv->hw, mq);
        } else {
            IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d", mq);
        }
    }

    priv->passive_no_rx = false;
}

static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
    struct ieee80211_tx_info *info;

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

static void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
{
    struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

    if (state)
        set_bit(STATUS_RF_KILL_HW, &priv->status);
    else
        clear_bit(STATUS_RF_KILL_HW, &priv->status);

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

static const struct iwl_op_mode_ops iwl_dvm_ops = {
    .start = iwl_op_mode_dvm_start,
    .stop = iwl_op_mode_dvm_stop,
    .rx = iwl_rx_dispatch,
    .queue_full = iwl_stop_sw_queue,
    .queue_not_full = iwl_wake_sw_queue,
    .hw_rf_kill = iwl_set_hw_rfkill_state,
    .free_skb = iwl_free_skb,
    .nic_error = iwl_nic_error,
    .cmd_queue_full = iwl_cmd_queue_full,
    .nic_config = iwl_nic_config,
    .wimax_active = iwl_wimax_active,
};

/*****************************************************************************
 *
 * driver and module entry point
 *
 *****************************************************************************/
static int __init iwl_init(void)
{

    int ret;
    pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
    pr_info(DRV_COPYRIGHT "\n");

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

    ret = iwl_opmode_register("iwldvm", &iwl_dvm_ops);
    if (ret) {
        pr_err("Unable to register op_mode: %d\n", ret);
        iwlagn_rate_control_unregister();
    }

    return ret;
}
module_init(iwl_init);

static void __exit iwl_exit(void)
{
    iwl_opmode_deregister("iwldvm");
    iwlagn_rate_control_unregister();
}
module_exit(iwl_exit);