// SPDX-License-Identifier: GPL-2.0-only
/******************************************************************************
 *
 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2015 Intel Deutschland GmbH
 * Copyright (C) 2018 Intel Corporation
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * 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
 *
 ******************************************************************************/

#define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");

/* Please keep this array *SORTED* by hex value.
 * Access is done through binary search.
 * A warning will be triggered on violation.
 */
static const struct iwl_hcmd_names iwl_dvm_cmd_names[] = {
        HCMD_NAME(REPLY_ALIVE),
        HCMD_NAME(REPLY_ERROR),
        HCMD_NAME(REPLY_ECHO),
        HCMD_NAME(REPLY_RXON),
        HCMD_NAME(REPLY_RXON_ASSOC),
        HCMD_NAME(REPLY_QOS_PARAM),
        HCMD_NAME(REPLY_RXON_TIMING),
        HCMD_NAME(REPLY_ADD_STA),
        HCMD_NAME(REPLY_REMOVE_STA),
        HCMD_NAME(REPLY_REMOVE_ALL_STA),
        HCMD_NAME(REPLY_TX),
        HCMD_NAME(REPLY_TXFIFO_FLUSH),
        HCMD_NAME(REPLY_WEPKEY),
        HCMD_NAME(REPLY_LEDS_CMD),
        HCMD_NAME(REPLY_TX_LINK_QUALITY_CMD),
        HCMD_NAME(COEX_PRIORITY_TABLE_CMD),
        HCMD_NAME(COEX_MEDIUM_NOTIFICATION),
        HCMD_NAME(COEX_EVENT_CMD),
        HCMD_NAME(TEMPERATURE_NOTIFICATION),
        HCMD_NAME(CALIBRATION_CFG_CMD),
        HCMD_NAME(CALIBRATION_RES_NOTIFICATION),
        HCMD_NAME(CALIBRATION_COMPLETE_NOTIFICATION),
        HCMD_NAME(REPLY_QUIET_CMD),
        HCMD_NAME(REPLY_CHANNEL_SWITCH),
        HCMD_NAME(CHANNEL_SWITCH_NOTIFICATION),
        HCMD_NAME(REPLY_SPECTRUM_MEASUREMENT_CMD),
        HCMD_NAME(SPECTRUM_MEASURE_NOTIFICATION),
        HCMD_NAME(POWER_TABLE_CMD),
        HCMD_NAME(PM_SLEEP_NOTIFICATION),
        HCMD_NAME(PM_DEBUG_STATISTIC_NOTIFIC),
        HCMD_NAME(REPLY_SCAN_CMD),
        HCMD_NAME(REPLY_SCAN_ABORT_CMD),
        HCMD_NAME(SCAN_START_NOTIFICATION),
        HCMD_NAME(SCAN_RESULTS_NOTIFICATION),
        HCMD_NAME(SCAN_COMPLETE_NOTIFICATION),
        HCMD_NAME(BEACON_NOTIFICATION),
        HCMD_NAME(REPLY_TX_BEACON),
        HCMD_NAME(WHO_IS_AWAKE_NOTIFICATION),
        HCMD_NAME(REPLY_TX_POWER_DBM_CMD),
        HCMD_NAME(QUIET_NOTIFICATION),
        HCMD_NAME(REPLY_TX_PWR_TABLE_CMD),
        HCMD_NAME(REPLY_TX_POWER_DBM_CMD_V1),
        HCMD_NAME(TX_ANT_CONFIGURATION_CMD),
        HCMD_NAME(MEASURE_ABORT_NOTIFICATION),
        HCMD_NAME(REPLY_BT_CONFIG),
        HCMD_NAME(REPLY_STATISTICS_CMD),
        HCMD_NAME(STATISTICS_NOTIFICATION),
        HCMD_NAME(REPLY_CARD_STATE_CMD),
        HCMD_NAME(CARD_STATE_NOTIFICATION),
        HCMD_NAME(MISSED_BEACONS_NOTIFICATION),
        HCMD_NAME(REPLY_CT_KILL_CONFIG_CMD),
        HCMD_NAME(SENSITIVITY_CMD),
        HCMD_NAME(REPLY_PHY_CALIBRATION_CMD),
        HCMD_NAME(REPLY_WIPAN_PARAMS),
        HCMD_NAME(REPLY_WIPAN_RXON),
        HCMD_NAME(REPLY_WIPAN_RXON_TIMING),
        HCMD_NAME(REPLY_WIPAN_RXON_ASSOC),
        HCMD_NAME(REPLY_WIPAN_QOS_PARAM),
        HCMD_NAME(REPLY_WIPAN_WEPKEY),
        HCMD_NAME(REPLY_WIPAN_P2P_CHANNEL_SWITCH),
        HCMD_NAME(REPLY_WIPAN_NOA_NOTIFICATION),
        HCMD_NAME(REPLY_WIPAN_DEACTIVATION_COMPLETE),
        HCMD_NAME(REPLY_RX_PHY_CMD),
        HCMD_NAME(REPLY_RX_MPDU_CMD),
        HCMD_NAME(REPLY_RX),
        HCMD_NAME(REPLY_COMPRESSED_BA),
        HCMD_NAME(REPLY_BT_COEX_PRIO_TABLE),
        HCMD_NAME(REPLY_BT_COEX_PROT_ENV),
        HCMD_NAME(REPLY_BT_COEX_PROFILE_NOTIF),
        HCMD_NAME(REPLY_D3_CONFIG),
        HCMD_NAME(REPLY_WOWLAN_PATTERNS),
        HCMD_NAME(REPLY_WOWLAN_WAKEUP_FILTER),
        HCMD_NAME(REPLY_WOWLAN_TSC_RSC_PARAMS),
        HCMD_NAME(REPLY_WOWLAN_TKIP_PARAMS),
        HCMD_NAME(REPLY_WOWLAN_KEK_KCK_MATERIAL),
        HCMD_NAME(REPLY_WOWLAN_GET_STATUS),
};

static const struct iwl_hcmd_arr iwl_dvm_groups[] = {
        [0x0] = HCMD_ARR(iwl_dvm_cmd_names),
};

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,
        };
        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->nvm_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 == NL80211_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);

        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;

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

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, 0,
                                        sizeof(struct iwl_statistics_cmd),
                                        &statistics_cmd);
}

/**
 * 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(struct timer_list *t)
{
        struct iwl_priv *priv = from_timer(priv, t, statistics_periodic);

        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 */
        if (!iwl_trans_grab_nic_access(priv->trans, &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_trans_release_nic_access(priv->trans, &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_trans_read_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;
}

/**
 * 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(struct timer_list *t)
{
        struct iwl_priv *priv = from_timer(priv, t, ucode_trace);

        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);
}

/*
 * 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);

        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->lib->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,
                                       0, 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,
                                       0, 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, 0,
                                        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,
                             0, sizeof(struct iwl_bt_cmd), &bt_cmd))
                IWL_ERR(priv, "failed to send BT Coex Config\n");
}

/**
 * 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->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->lib->bt_params &&
            priv->lib->bt_params->advanced_bt_coexist) {
                /* Configure Bluetooth device coexistence support */
                if (priv->lib->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 if (priv->lib->bt_params) {
                /*
                 * 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->nvm_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);
}

/**
 * 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)
{
        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);

        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->lib->bt_params)
                priv->bt_traffic_load =
                         priv->lib->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 registering with mac80211\n");
        } else {
                WARN_ON(1);
        }
}

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

static void iwl_setup_deferred_work(struct iwl_priv *priv)
{
        priv->workqueue = alloc_ordered_workqueue(DRV_NAME, 0);

        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);

        iwl_setup_scan_deferred_work(priv);

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

        timer_setup(&priv->statistics_periodic, iwl_bg_statistics_periodic, 0);

        timer_setup(&priv->ucode_trace, iwl_bg_ucode_trace, 0);
}

void iwl_cancel_deferred_work(struct iwl_priv *priv)
{
        if (priv->lib->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);

        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 = NL80211_BAND_2GHZ;

        priv->plcp_delta_threshold = priv->lib->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->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->lib->bt_params &&
            priv->lib->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
}

static int iwl_eeprom_init_hw_params(struct iwl_priv *priv)
{
        struct iwl_nvm_data *data = priv->nvm_data;

        if (data->sku_cap_11n_enable &&
            !priv->cfg->ht_params) {
                IWL_ERR(priv, "Invalid 11n configuration\n");
                return -EINVAL;
        }

        if (!data->sku_cap_11n_enable && !data->sku_cap_band_24ghz_enable &&
            !data->sku_cap_band_52ghz_enable) {
                IWL_ERR(priv, "Invalid device sku\n");
                return -EINVAL;
        }

        IWL_DEBUG_INFO(priv,
                       "Device SKU: 24GHz %s %s, 52GHz %s %s, 11.n %s %s\n",
                       data->sku_cap_band_24ghz_enable ? "" : "NOT", "enabled",
                       data->sku_cap_band_52ghz_enable ? "" : "NOT", "enabled",
                       data->sku_cap_11n_enable ? "" : "NOT", "enabled");

        priv->hw_params.tx_chains_num =
                num_of_ant(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(data->valid_rx_ant);

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

        return 0;
}

static int iwl_nvm_check_version(struct iwl_nvm_data *data,
                                 struct iwl_trans *trans)
{
        if (data->nvm_version >= trans->cfg->nvm_ver ||
            data->calib_version >= trans->cfg->nvm_calib_ver) {
                IWL_DEBUG_INFO(trans, "device EEPROM VER=0x%x, CALIB=0x%x\n",
                               data->nvm_version, data->calib_version);
                return 0;
        }

        IWL_ERR(trans,
                "Unsupported (too old) EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
                data->nvm_version, trans->cfg->nvm_ver,
                data->calib_version,  trans->cfg->nvm_calib_ver);
        return -EINVAL;
}

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 = &iwl_dvm_1000_cfg;
                break;
        case IWL_DEVICE_FAMILY_2000:
                priv->lib = &iwl_dvm_2000_cfg;
                break;
        case IWL_DEVICE_FAMILY_105:
                priv->lib = &iwl_dvm_105_cfg;
                break;
        case IWL_DEVICE_FAMILY_2030:
        case IWL_DEVICE_FAMILY_135:
                priv->lib = &iwl_dvm_2030_cfg;
                break;
        case IWL_DEVICE_FAMILY_5000:
                priv->lib = &iwl_dvm_5000_cfg;
                break;
        case IWL_DEVICE_FAMILY_5150:
                priv->lib = &iwl_dvm_5150_cfg;
                break;
        case IWL_DEVICE_FAMILY_6000:
        case IWL_DEVICE_FAMILY_6000i:
                priv->lib = &iwl_dvm_6000_cfg;
                break;
        case IWL_DEVICE_FAMILY_6005:
                priv->lib = &iwl_dvm_6005_cfg;
                break;
        case IWL_DEVICE_FAMILY_6050:
        case IWL_DEVICE_FAMILY_6150:
                priv->lib = &iwl_dvm_6050_cfg;
                break;
        case IWL_DEVICE_FAMILY_6030:
                priv->lib = &iwl_dvm_6030_cfg;
                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);

        switch (iwlwifi_mod_params.amsdu_size) {
        case IWL_AMSDU_DEF:
        case IWL_AMSDU_4K:
                trans_cfg.rx_buf_size = IWL_AMSDU_4K;
                break;
        case IWL_AMSDU_8K:
                trans_cfg.rx_buf_size = IWL_AMSDU_8K;
                break;
        case IWL_AMSDU_12K:
        default:
                trans_cfg.rx_buf_size = IWL_AMSDU_4K;
                pr_err("Unsupported amsdu_size: %d\n",
                       iwlwifi_mod_params.amsdu_size);
        }

        trans_cfg.cmd_q_wdg_timeout = IWL_WATCHDOG_DISABLED;

        trans_cfg.command_groups = iwl_dvm_groups;
        trans_cfg.command_groups_size = ARRAY_SIZE(iwl_dvm_groups);

        trans_cfg.cmd_fifo = IWLAGN_CMD_FIFO_NUM;
        trans_cfg.cb_data_offs = offsetof(struct ieee80211_tx_info,
                                          driver_data[2]);

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

        ucode_flags = fw->ucode_capa.flags;

        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);

        trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
        trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
        trans->command_groups = trans_cfg.command_groups;
        trans->command_groups_size = trans_cfg.command_groups_size;

        /* 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.antenna_coupling >
                        IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
                        true : false;

        /* bt channel inhibition enabled*/
        priv->bt_ch_announce = true;
        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_device(priv->trans);

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

        if (iwl_nvm_check_version(priv->nvm_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->nvm_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->nvm_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->nvm_data->sku_cap_ipan_enable)) {
                IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN\n");
                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
                 */
                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_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;

        iwl_dbgfs_register(priv, dbgfs_dir);

        return op_mode;

out_destroy_workqueue:
        iwl_tt_exit(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:
        kfree(priv->nvm_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");

        iwlagn_mac_unregister(priv);

        iwl_tt_exit(priv);

        kfree(priv->eeprom_blob);
        kfree(priv->nvm_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_op_mode_leave(priv->trans);
        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_trans_read_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);
        }

        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))

/**
 * iwl_print_event_log - Dump error event log to syslog
 *
 */
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 */
        if (!iwl_trans_grab_nic_access(trans, &reg_flags))
                return pos;

        /* 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_trans_release_nic_access(trans, &reg_flags);
        return pos;
}

/**
 * iwl_print_last_event_logs - Dump the newest # of event log to syslog
 */
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)
{
        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_trans_read_mem32(trans, base);
        mode = iwl_trans_read_mem32(trans, base + (1 * sizeof(u32)));
        num_wraps = iwl_trans_read_mem32(trans, base + (2 * sizeof(u32)));
        next_entry = iwl_trans_read_mem32(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;
        }

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

#ifdef CONFIG_IWLWIFI_DEBUG
        if (buf) {
                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) || 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;

        if (iwl_have_debug_level(IWL_DL_FW))
                iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);

        /* 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);

        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.fw_restart) {
                        IWL_DEBUG_FW(priv,
                                     "Restarting adapter due to uCode error.\n");
                        queue_work(priv->workqueue, &priv->restart);
                } else
                        IWL_DEBUG_FW(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);

        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);

        /* SKU Control */
        iwl_trans_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 (priv->nvm_data->radio_cfg_type <= EEPROM_RF_CONFIG_TYPE_MAX) {
                u32 reg_val =
                        priv->nvm_data->radio_cfg_type <<
                                CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE |
                        priv->nvm_data->radio_cfg_step <<
                                CSR_HW_IF_CONFIG_REG_POS_PHY_STEP |
                        priv->nvm_data->radio_cfg_dash <<
                                CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;

                iwl_trans_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",
                         priv->nvm_data->radio_cfg_type,
                         priv->nvm_data->radio_cfg_step,
                         priv->nvm_data->radio_cfg_dash);
        } 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\n", mq);
                        ieee80211_wake_queue(priv->hw, mq);
                } else {
                        IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d\n", 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 bool 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);

        return false;
}

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;

        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);