iwlwifi: introduce per-queue locks

[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn.c

/******************************************************************************
 *
 * 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 <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/
#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-ucode.h"
#include "iwl-eeprom.h"
#include "iwl-wifi.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-agn-calib.h"
#include "iwl-agn.h"
#include "iwl-shared.h"
#include "iwl-trans.h"
#include "iwl-op-mode.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");
MODULE_ALIAS("iwlagn");

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->shrd->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,
                                              hw_params(priv).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_trans_send_cmd(trans(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->shrd->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->shrd->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->shrd->status))
                return;

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

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

        /* dont send host command if rf-kill is on */
        if (!iwl_is_ready_rf(priv->shrd))
                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->shrd->mutex);
}

/**
 * iwl_bg_statistics_periodic - Timer callback to queue statistics
 *
 * This callback is provided in order to send a statistics request.
 *
 * This timer function is continually reset to execute within
 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 * was received.  We need to ensure we receive the statistics in order
 * to update the temperature used for calibrating the TXPOWER.
 */
static void iwl_bg_statistics_periodic(unsigned long data)
{
        struct iwl_priv *priv = (struct iwl_priv *)data;

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

        /* dont send host command if rf-kill is on */
        if (!iwl_is_ready_rf(priv->shrd))
                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(&trans(priv)->reg_lock, reg_flags);
        if (iwl_grab_nic_access(trans(priv))) {
                spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
                return;
        }

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

        /*
         * 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(trans(priv), HBUS_TARG_MEM_RDAT);
                time = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
                if (mode == 0) {
                        trace_iwlwifi_dev_ucode_cont_event(priv, 0, time, ev);
                } else {
                        data = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
                        trace_iwlwifi_dev_ucode_cont_event(priv, time,
                                                           data, ev);
                }
        }
        /* Allow device to power down */
        iwl_release_nic_access(trans(priv));
        spin_unlock_irqrestore(&trans(priv)->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->shrd->device_pointers.log_event_table;
        if (iwlagn_hw_valid_rtc_data_addr(base)) {
                iwl_read_targ_mem_words(trans(priv), 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,
                                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;
}

/**
 * iwl_bg_ucode_trace - Timer callback to log ucode event
 *
 * The timer is continually set to execute every
 * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 * this function is to perform continuous uCode event logging operation
 * if enabled
 */
static void iwl_bg_ucode_trace(unsigned long data)
{
        struct iwl_priv *priv = (struct iwl_priv *)data;

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

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

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

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->shrd->valid_contexts = BIT(IWL_RXON_CTX_BSS);
        if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
                priv->shrd->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);
        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;

        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;

        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;
        unsigned long flags;
        int ret = 0;

        spin_lock_irqsave(&priv->shrd->lock, flags);
        iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
                    CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
        spin_unlock_irqrestore(&priv->shrd->lock, flags);
        priv->thermal_throttle.ct_kill_toggle = false;

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

                ret = iwl_trans_send_cmd_pdu(trans(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",
                                hw_params(priv).ct_kill_threshold,
                                hw_params(priv).ct_kill_exit_threshold);
        } else {
                cmd.critical_temperature_R =
                        cpu_to_le32(hw_params(priv).ct_kill_threshold);

                ret = iwl_trans_send_cmd_pdu(trans(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",
                                hw_params(priv).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_trans_send_cmd(trans(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(nic(priv)->fw.ucode_ver) > 1) {
                IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
                return iwl_trans_send_cmd_pdu(trans(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;
        }
}

/**
 * iwl_alive_start - called after REPLY_ALIVE notification received
 *                   from protocol/runtime uCode (initialization uCode's
 *                   Alive gets handled by iwl_init_alive_start()).
 */
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->shrd->status);

        /* Enable watchdog to monitor the driver tx queues */
        iwl_setup_watchdog(priv);

        if (iwl_is_rfkill(priv->shrd))
                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 (cfg(priv)->bt_params &&
            cfg(priv)->bt_params->advanced_bt_coexist) {
                /* Configure Bluetooth device coexistence support */
                if (cfg(priv)->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(trans(priv));

                /* FIXME: w/a to force change uCode BT state machine */
                ret = iwl_send_bt_env(trans(priv), IWL_BT_COEX_ENV_OPEN,
                                         BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
                if (ret)
                        return ret;
                ret = iwl_send_bt_env(trans(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);

        priv->active_rate = IWL_RATES_MASK;

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

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

        set_bit(STATUS_READY, &priv->shrd->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);
}

/**
 * iwl_clear_driver_stations - clear knowledge of all stations from driver
 * @priv: iwl priv struct
 *
 * This is called during iwl_down() to make sure that in the case
 * we're coming there from a hardware restart mac80211 will be
 * able to reconfigure stations -- if we're getting there in the
 * normal down flow then the stations will already be cleared.
 */
static void iwl_clear_driver_stations(struct iwl_priv *priv)
{
        unsigned long flags;
        struct iwl_rxon_context *ctx;

        spin_lock_irqsave(&priv->shrd->sta_lock, flags);
        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_irqrestore(&priv->shrd->sta_lock, flags);
}

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

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

        lockdep_assert_held(&priv->shrd->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.
         */
        ieee80211_remain_on_channel_expired(priv->hw);

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

        /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
         * to prevent rearm timer */
        del_timer_sync(&priv->watchdog);

        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 (cfg(priv)->bt_params)
                priv->bt_traffic_load =
                         cfg(priv)->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->shrd->status);

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

        iwl_trans_stop_device(trans(priv));

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

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

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

        mutex_unlock(&priv->shrd->mutex);
}

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

        lockdep_assert_held(&priv->shrd->mutex);

        for_each_context(priv, ctx)
                ctx->vif = NULL;
        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;
}

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->shrd->status))
                return;

        if (test_and_clear_bit(STATUS_FW_ERROR, &priv->shrd->status)) {
                mutex_lock(&priv->shrd->mutex);
                iwlagn_prepare_restart(priv);
                mutex_unlock(&priv->shrd->mutex);
                iwl_cancel_deferred_work(priv);
                ieee80211_restart_hw(priv->hw);
        } 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->shrd->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->shrd->mutex);
        iwlagn_disable_roc(priv);
        mutex_unlock(&priv->shrd->mutex);
}

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

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

        init_waitqueue_head(&priv->shrd->wait_command_queue);

        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 (cfg(priv)->lib->bt_setup_deferred_work)
                cfg(priv)->lib->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;

        init_timer(&priv->watchdog);
        priv->watchdog.data = (unsigned long)priv;
        priv->watchdog.function = iwl_bg_watchdog;
}

void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
        if (cfg(priv)->lib->cancel_deferred_work)
                cfg(priv)->lib->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 void iwl_init_hw_rates(struct iwl_priv *priv,
                              struct ieee80211_rate *rates)
{
        int i;

        for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
                rates[i].bitrate = iwl_rates[i].ieee * 5;
                rates[i].hw_value = i; /* Rate scaling will work on indexes */
                rates[i].hw_value_short = i;
                rates[i].flags = 0;
                if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
                        /*
                         * If CCK != 1M then set short preamble rate flag.
                         */
                        rates[i].flags |=
                                (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
                                        0 : IEEE80211_RATE_SHORT_PREAMBLE;
                }
        }
}

static int iwl_init_drv(struct iwl_priv *priv)
{
        int ret;

        spin_lock_init(&priv->shrd->sta_lock);

        mutex_init(&priv->shrd->mutex);

        INIT_LIST_HEAD(&trans(priv)->calib_results);

        priv->ieee_channels = NULL;
        priv->ieee_rates = NULL;
        priv->band = IEEE80211_BAND_2GHZ;

        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;

        /* initialize force reset */
        priv->force_reset[IWL_RF_RESET].reset_duration =
                IWL_DELAY_NEXT_FORCE_RF_RESET;
        priv->force_reset[IWL_FW_RESET].reset_duration =
                IWL_DELAY_NEXT_FORCE_FW_RELOAD;

        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 (cfg(priv)->bt_params &&
            cfg(priv)->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;
        }

        ret = iwl_init_channel_map(priv);
        if (ret) {
                IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
                goto err;
        }

        ret = iwl_init_geos(priv);
        if (ret) {
                IWL_ERR(priv, "initializing geos failed: %d\n", ret);
                goto err_free_channel_map;
        }
        iwl_init_hw_rates(priv, priv->ieee_rates);

        return 0;

err_free_channel_map:
        iwl_free_channel_map(priv);
err:
        return ret;
}

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

/* Size of one Rx buffer in host DRAM */
#define IWL_RX_BUF_SIZE_4K (4 * 1024)
#define IWL_RX_BUF_SIZE_8K (8 * 1024)

static void iwl_set_hw_params(struct iwl_priv *priv)
{
        if (iwlagn_mod_params.amsdu_size_8K)
                hw_params(priv).rx_page_order =
                        get_order(IWL_RX_BUF_SIZE_8K);
        else
                hw_params(priv).rx_page_order =
                        get_order(IWL_RX_BUF_SIZE_4K);

        if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
                cfg(priv)->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;

        hw_params(priv).num_ampdu_queues =
                cfg(priv)->base_params->num_of_ampdu_queues;
        hw_params(priv).shadow_reg_enable =
                cfg(priv)->base_params->shadow_reg_enable;
        hw_params(priv).sku = cfg(priv)->sku;
        hw_params(priv).wd_timeout = cfg(priv)->base_params->wd_timeout;

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



static void iwl_debug_config(struct iwl_priv *priv)
{
        dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUG "
#ifdef CONFIG_IWLWIFI_DEBUG
                "enabled\n");
#else
                "disabled\n");
#endif
        dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUGFS "
#ifdef CONFIG_IWLWIFI_DEBUGFS
                "enabled\n");
#else
                "disabled\n");
#endif
        dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TRACING "
#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
                "enabled\n");
#else
                "disabled\n");
#endif

        dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TESTMODE "
#ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
                "enabled\n");
#else
                "disabled\n");
#endif
        dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_P2P "
#ifdef CONFIG_IWLWIFI_P2P
                "enabled\n");
#else
                "disabled\n");
#endif
}

static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans)
{
        struct iwl_fw *fw = &nic(trans)->fw;
        int err = 0;
        struct iwl_priv *priv;
        struct ieee80211_hw *hw;
        struct iwl_op_mode *op_mode;
        u16 num_mac;
        u32 ucode_flags;

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

        op_mode = hw->priv;
        op_mode->ops = &iwl_dvm_ops;
        priv = IWL_OP_MODE_GET_DVM(op_mode);
        priv->shrd = trans->shrd;
        priv->shrd->priv = priv;

        iwl_trans_configure(trans(priv), op_mode);

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

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

        /* show what debugging capabilities we have */
        iwl_debug_config(priv);

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

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

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

        if (iwl_alloc_traffic_mem(priv))
                IWL_ERR(priv, "Not enough memory to generate traffic log\n");

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

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

        err = iwl_trans_start_hw(trans(priv));
        if (err)
                goto out_free_traffic_mem;

        /*****************
         * 4. Read EEPROM
         *****************/
        /* Read the EEPROM */
        err = iwl_eeprom_init(trans(priv), trans(priv)->hw_rev);
        /* Reset chip to save power until we load uCode during "up". */
        iwl_trans_stop_hw(trans(priv));
        if (err) {
                IWL_ERR(priv, "Unable to init EEPROM\n");
                goto out_free_traffic_mem;
        }
        err = iwl_eeprom_check_version(priv);
        if (err)
                goto out_free_eeprom;

        err = iwl_eeprom_check_sku(priv);
        if (err)
                goto out_free_eeprom;

        /* extract MAC Address */
        iwl_eeprom_get_mac(priv->shrd, priv->addresses[0].addr);
        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 = iwl_eeprom_query16(priv->shrd, EEPROM_NUM_MAC_ADDRESS);
        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++;
        }

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

        ucode_flags = fw->ucode_capa.flags;

#ifndef CONFIG_IWLWIFI_P2P
        ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
#endif
        if (!(hw_params(priv).sku & EEPROM_SKU_CAP_IPAN_ENABLE))
                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
         */
        if (!(ucode_flags & IWL_UCODE_TLV_FLAGS_PAN))
                ucode_flags &= ~IWL_UCODE_TLV_FLAGS_P2P;


        /*******************
         * 6. Setup priv
         *******************/

        err = iwl_init_drv(priv);
        if (err)
                goto out_free_eeprom;
        /* At this point both hw and priv are initialized. */

        /********************
         * 7. 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);

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

        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...
         *
         * 9. Setup and register with mac80211 and debugfs
         **************************************************/
        err = iwlagn_mac_setup_register(priv, &fw->ucode_capa);
        if (err)
                goto out_destroy_workqueue;

        err = iwl_dbgfs_register(priv, DRV_NAME);
        if (err)
                IWL_ERR(priv,
                        "failed to create debugfs files. Ignoring error: %d\n",
                        err);

        return op_mode;

out_destroy_workqueue:
        destroy_workqueue(priv->workqueue);
        priv->workqueue = NULL;
        iwl_uninit_drv(priv);
out_free_eeprom:
        iwl_eeprom_free(priv->shrd);
out_free_traffic_mem:
        iwl_free_traffic_mem(priv);
        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);

        wait_for_completion(&nic(priv)->request_firmware_complete);

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

        iwl_dbgfs_unregister(priv);

        /* ieee80211_unregister_hw call wil cause iwlagn_mac_stop to
         * to be called and iwl_down since we are removing the device
         * we need to set STATUS_EXIT_PENDING bit.
         */
        set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);

        iwl_testmode_cleanup(priv);
        iwlagn_mac_unregister(priv);

        iwl_tt_exit(priv);

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

        iwl_dealloc_ucode(nic(priv));

        iwl_eeprom_free(priv->shrd);

        /*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_free_traffic_mem(priv);

        iwl_uninit_drv(priv);

        dev_kfree_skb(priv->beacon_skb);

        ieee80211_free_hw(priv->hw);
}

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,
};

/*****************************************************************************
 *
 * 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_pci_register_driver();

        if (ret)
                goto error_register;
        return ret;

error_register:
        iwlagn_rate_control_unregister();
        return ret;
}

static void __exit iwl_exit(void)
{
        iwl_pci_unregister_driver();
        iwlagn_rate_control_unregister();
}

module_exit(iwl_exit);
module_init(iwl_init);

#ifdef CONFIG_IWLWIFI_DEBUG
module_param_named(debug, iwlagn_mod_params.debug_level, uint,
                   S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "debug output mask");
#endif

module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
MODULE_PARM_DESC(queues_num, "number of hw queues.");
module_param_named(11n_disable, iwlagn_mod_params.disable_11n, uint, S_IRUGO);
MODULE_PARM_DESC(11n_disable,
        "disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX");
module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
                   int, S_IRUGO);
MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");

module_param_named(ucode_alternative,
                   iwlagn_mod_params.wanted_ucode_alternative,
                   int, S_IRUGO);
MODULE_PARM_DESC(ucode_alternative,
                 "specify ucode alternative to use from ucode file");

module_param_named(antenna_coupling, iwlagn_mod_params.ant_coupling,
                   int, S_IRUGO);
MODULE_PARM_DESC(antenna_coupling,
                 "specify antenna coupling in dB (defualt: 0 dB)");

module_param_named(bt_ch_inhibition, iwlagn_mod_params.bt_ch_announce,
                   bool, S_IRUGO);
MODULE_PARM_DESC(bt_ch_inhibition,
                 "Enable BT channel inhibition (default: enable)");

module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");

module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");

module_param_named(wd_disable, iwlagn_mod_params.wd_disable, int, S_IRUGO);
MODULE_PARM_DESC(wd_disable,
                "Disable stuck queue watchdog timer 0=system default, "
                "1=disable, 2=enable (default: 0)");

/*
 * set bt_coex_active to true, uCode will do kill/defer
 * every time the priority line is asserted (BT is sending signals on the
 * priority line in the PCIx).
 * set bt_coex_active to false, uCode will ignore the BT activity and
 * perform the normal operation
 *
 * User might experience transmit issue on some platform due to WiFi/BT
 * co-exist problem. The possible behaviors are:
 *   Able to scan and finding all the available AP
 *   Not able to associate with any AP
 * On those platforms, WiFi communication can be restored by set
 * "bt_coex_active" module parameter to "false"
 *
 * default: bt_coex_active = true (BT_COEX_ENABLE)
 */
module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
                bool, S_IRUGO);
MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");

module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
MODULE_PARM_DESC(led_mode, "0=system default, "
                "1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0)");

module_param_named(power_save, iwlagn_mod_params.power_save,
                bool, S_IRUGO);
MODULE_PARM_DESC(power_save,
                 "enable WiFi power management (default: disable)");

module_param_named(power_level, iwlagn_mod_params.power_level,
                int, S_IRUGO);
MODULE_PARM_DESC(power_level,
                 "default power save level (range from 1 - 5, default: 1)");

module_param_named(auto_agg, iwlagn_mod_params.auto_agg,
                bool, S_IRUGO);
MODULE_PARM_DESC(auto_agg,
                 "enable agg w/o check traffic load (default: enable)");

/*
 * For now, keep using power level 1 instead of automatically
 * adjusting ...
 */
module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
                bool, S_IRUGO);
MODULE_PARM_DESC(no_sleep_autoadjust,
                 "don't automatically adjust sleep level "
                 "according to maximum network latency (default: true)");