Quelle  main.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/******************************************************************************
 *
 * Copyright(c) 2003 - 2014, 2018 - 2022 Intel Corporation. All rights reserved.
 * Copyright(c) 2024-2025 Intel Corporation. All rights reserved.
 * Copyright(c) 2015 Intel Deutschland GmbH
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *****************************************************************************/

#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-nvm-utils.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_LICENSE("GPL");
MODULE_IMPORT_NS("IWLWIFI");

/* 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, 0);
 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 = timer_container_of(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 */

 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))
  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);
}

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 = timer_container_of(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 = (void *)(uintptr_t)&ctx->active;

  /* apply any changes in staging */
  ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
  active->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 int iwl_setup_deferred_work(struct iwl_priv *priv)
{
 priv->workqueue = alloc_ordered_workqueue(DRV_NAME, 0);
 if (!priv->workqueue)
  return -ENOMEM;

 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);

 return 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);

 timer_delete_sync(&priv->statistics_periodic);
 timer_delete_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)
{
 /* there are no devices with HT but without HT40 on all bands */
 if (priv->cfg->ht_params.ht40_bands)
  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;

 /* all HT devices also have HT40 on at least one band */
 if (data->sku_cap_11n_enable &&
     !priv->cfg->ht_params.ht40_bands) {
  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_rf_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;
 static const u8 no_reclaim_cmds[] = {
  REPLY_RX_PHY_CMD,
  REPLY_RX_MPDU_CMD,
  REPLY_COMPRESSED_BA,
  STATISTICS_NOTIFICATION,
  REPLY_TX,
 };
 int i, err;

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

 /*
 * Populate the state variables that the transport layer needs
 * to know about.
 */
 BUILD_BUG_ON(sizeof(no_reclaim_cmds) >
       sizeof(trans->conf.no_reclaim_cmds));
 memcpy(trans->conf.no_reclaim_cmds, no_reclaim_cmds,
        sizeof(no_reclaim_cmds));
 trans->conf.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);

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

 trans->conf.command_groups = iwl_dvm_groups;
 trans->conf.command_groups_size = ARRAY_SIZE(iwl_dvm_groups);

 trans->conf.cmd_fifo = IWLAGN_CMD_FIFO_NUM;
 trans->conf.cb_data_offs = offsetof(struct ieee80211_tx_info,
         driver_data[2]);

 WARN_ON(sizeof(priv->transport_queue_stop) * BITS_PER_BYTE <
  priv->trans->mac_cfg->base->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->conf.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
 } else {
  priv->sta_key_max_num = STA_KEY_MAX_NUM;
  trans->conf.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
 }

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

 iwl_trans_op_mode_enter(priv->trans, op_mode);

 /* 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");

 /* 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->trans->info.name, priv->trans->info.hw_rev);

 err = iwl_trans_start_hw(priv->trans);
 if (err)
  goto out_leave_trans;

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

 /* 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, priv->cfg,
            priv->eeprom_blob,
            priv->eeprom_blob_size);
 if (!priv->nvm_data) {
  err = -ENOMEM;
  goto out_free_eeprom_blob;
 }

 err = iwl_nvm_check_version(priv->nvm_data, priv->trans);
 if (err)
  goto out_free_eeprom;

 err = iwl_eeprom_init_hw_params(priv);
 if (err)
  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->conf.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
 }

 /*******************
 * 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);
 }

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

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

 /********************
 * 6. Setup services
 ********************/
 err = iwl_setup_deferred_work(priv);
 if (err)
  goto out_uninit_drv;

 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),
   "%.31s", 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
 **************************************************/
 err = iwlagn_mac_setup_register(priv, &fw->ucode_capa);
 if (err)
  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;
out_uninit_drv:
 iwl_uninit_drv(priv);
out_free_eeprom_blob:
 kfree(priv->eeprom_blob);
out_free_eeprom:
 kfree(priv->nvm_data);
out_leave_trans:
 iwl_trans_op_mode_leave(priv->trans);
out_free_hw:
 ieee80211_free_hw(priv->hw);
out:
 return ERR_PTR(err);
}

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); */

 /* 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 */

 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))
  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);
 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;

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

 /* 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,
     enum iwl_fw_error_type type)
{
 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

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

 iwl_abort_notification_waits(&priv->notif_wait);

 if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL && iwl_check_for_ct_kill(priv))
  return;

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

 if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL) {
  IWL_ERR(priv, "Command queue full!\n");
 } else {
  iwl_dump_nic_error_log(priv);
  iwl_dump_nic_event_log(priv, false, NULL);
 }

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

static bool iwlagn_sw_reset(struct iwl_op_mode *op_mode,
       enum iwl_fw_error_type type)
{
 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

 if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL && iwl_check_for_ct_kill(priv))
  return false;

 iwlagn_fw_error(priv, false);
 return true;
}

#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_STEP_DASH,
    CSR_HW_REV_STEP_DASH(priv->trans->info.hw_rev));

 /* 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,
 .sw_reset = iwlagn_sw_reset,
 .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);