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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
  *
  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
  *
  * Portions of this file are derived from the ipw3945 project, as well
  * as portions of the ieee80211 subsystem header files.
  *
  * Contact Information:
  *  Intel Linux Wireless <ilw@linux.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/pci.h>
 #include <linux/slab.h>
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
 #include <linux/sched.h>
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
 #include <linux/firmware.h>
 #include <linux/etherdevice.h>
 #include <linux/if_arp.h>
 
 #include <net/ieee80211_radiotap.h>
 #include <net/mac80211.h>
 
 #include <asm/div64.h>
 
 #define DRV_NAME    "iwl3945"
 
 #include "commands.h"
 #include "common.h"
 #include "3945.h"
 #include "iwl-spectrum.h"
 
 /*
  * module name, copyright, version, etc.
  */
 
 #define DRV_DESCRIPTION \
 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
 
 #ifdef CONFIG_IWLEGACY_DEBUG
 #define VD "d"
 #else
 #define VD
 #endif
 
 /*
  * add "s" to indicate spectrum measurement included.
  * we add it here to be consistent with previous releases in which
  * this was configurable.
  */
 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
 #define DRV_COPYRIGHT   "Copyright(c) 2003-2011 Intel Corporation"
 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
 
 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 MODULE_VERSION(DRV_VERSION);
 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
 MODULE_LICENSE("GPL");
 
  /* module parameters */
 struct il_mod_params il3945_mod_params = {
     .sw_crypto = 1,
     .restart_fw = 1,
     .disable_hw_scan = 1,
     /* the rest are 0 by default */
 };
 
 /**
  * il3945_get_antenna_flags - Get antenna flags for RXON command
  * @il: eeprom and antenna fields are used to determine antenna flags
  *
  * il->eeprom39  is used to determine if antenna AUX/MAIN are reversed
  * il3945_mod_params.antenna specifies the antenna diversity mode:
  *
  * IL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
  * IL_ANTENNA_MAIN      - Force MAIN antenna
  * IL_ANTENNA_AUX       - Force AUX antenna
  */
 __le32
 il3945_get_antenna_flags(const struct il_priv *il)
 {
     struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
 
     switch (il3945_mod_params.antenna) {
     case IL_ANTENNA_DIVERSITY:
         return 0;
 
     case IL_ANTENNA_MAIN:
         if (eeprom->antenna_switch_type)
             return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 
     case IL_ANTENNA_AUX:
         if (eeprom->antenna_switch_type)
             return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
     }
 
     /* bad antenna selector value */
     IL_ERR("Bad antenna selector value (0x%x)\n",
            il3945_mod_params.antenna);
 
     return 0;       /* "diversity" is default if error */
 }
 
 static int
 il3945_set_ccmp_dynamic_key_info(struct il_priv *il,
                  struct ieee80211_key_conf *keyconf, u8 sta_id)
 {
     unsigned long flags;
     __le16 key_flags = 0;
     int ret;
 
     key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
     key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 
     if (sta_id == il->hw_params.bcast_id)
         key_flags |= STA_KEY_MULTICAST_MSK;
 
     keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
     keyconf->hw_key_idx = keyconf->keyidx;
     key_flags &= ~STA_KEY_FLG_INVALID;
 
     spin_lock_irqsave(&il->sta_lock, flags);
     il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
     il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
     memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
 
     memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
 
     if ((il->stations[sta_id].sta.key.
          key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
         il->stations[sta_id].sta.key.key_offset =
             il_get_free_ucode_key_idx(il);
     /* else, we are overriding an existing key => no need to allocated room
      * in uCode. */
 
     WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
          "no space for a new key");
 
     il->stations[sta_id].sta.key.key_flags = key_flags;
     il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
     il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 
     D_INFO("hwcrypto: modify ucode station key info\n");
 
     ret = il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
 
     spin_unlock_irqrestore(&il->sta_lock, flags);
 
     return ret;
 }
 
 static int
 il3945_set_tkip_dynamic_key_info(struct il_priv *il,
                  struct ieee80211_key_conf *keyconf, u8 sta_id)
 {
     return -EOPNOTSUPP;
 }
 
 static int
 il3945_set_wep_dynamic_key_info(struct il_priv *il,
                 struct ieee80211_key_conf *keyconf, u8 sta_id)
 {
     return -EOPNOTSUPP;
 }
 
 static int
 il3945_clear_sta_key_info(struct il_priv *il, u8 sta_id)
 {
     unsigned long flags;
     struct il_addsta_cmd sta_cmd;
 
     spin_lock_irqsave(&il->sta_lock, flags);
     memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
     memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
     il->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
     il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
     il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
     memcpy(&sta_cmd, &il->stations[sta_id].sta,
            sizeof(struct il_addsta_cmd));
     spin_unlock_irqrestore(&il->sta_lock, flags);
 
     D_INFO("hwcrypto: clear ucode station key info\n");
     return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
 }
 
 static int
 il3945_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
                u8 sta_id)
 {
     int ret = 0;
 
     keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 
     switch (keyconf->cipher) {
     case WLAN_CIPHER_SUITE_CCMP:
         ret = il3945_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
         break;
     case WLAN_CIPHER_SUITE_TKIP:
         ret = il3945_set_tkip_dynamic_key_info(il, keyconf, sta_id);
         break;
     case WLAN_CIPHER_SUITE_WEP40:
     case WLAN_CIPHER_SUITE_WEP104:
         ret = il3945_set_wep_dynamic_key_info(il, keyconf, sta_id);
         break;
     default:
         IL_ERR("Unknown alg: %s alg=%x\n", __func__, keyconf->cipher);
         ret = -EINVAL;
     }
 
     D_WEP("Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
           keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
 
     return ret;
 }
 
 static int
 il3945_remove_static_key(struct il_priv *il)
 {
     return -EOPNOTSUPP;
 }
 
 static int
 il3945_set_static_key(struct il_priv *il, struct ieee80211_key_conf *key)
 {
     if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
         key->cipher == WLAN_CIPHER_SUITE_WEP104)
         return -EOPNOTSUPP;
 
     IL_ERR("Static key invalid: cipher %x\n", key->cipher);
     return -EINVAL;
 }
 
 static void
 il3945_clear_free_frames(struct il_priv *il)
 {
     struct list_head *element;
 
     D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
 
     while (!list_empty(&il->free_frames)) {
         element = il->free_frames.next;
         list_del(element);
         kfree(list_entry(element, struct il3945_frame, list));
         il->frames_count--;
     }
 
     if (il->frames_count) {
         IL_WARN("%d frames still in use.  Did we lose one?\n",
             il->frames_count);
         il->frames_count = 0;
     }
 }
 
 static struct il3945_frame *
 il3945_get_free_frame(struct il_priv *il)
 {
     struct il3945_frame *frame;
     struct list_head *element;
     if (list_empty(&il->free_frames)) {
         frame = kzalloc(sizeof(*frame), GFP_KERNEL);
         if (!frame) {
             IL_ERR("Could not allocate frame!\n");
             return NULL;
         }
 
         il->frames_count++;
         return frame;
     }
 
     element = il->free_frames.next;
     list_del(element);
     return list_entry(element, struct il3945_frame, list);
 }
 
 static void
 il3945_free_frame(struct il_priv *il, struct il3945_frame *frame)
 {
     memset(frame, 0, sizeof(*frame));
     list_add(&frame->list, &il->free_frames);
 }
 
 unsigned int
 il3945_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
              int left)
 {
 
     if (!il_is_associated(il) || !il->beacon_skb)
         return 0;
 
     if (il->beacon_skb->len > left)
         return 0;
 
     memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
 
     return il->beacon_skb->len;
 }
 
 static int
 il3945_send_beacon_cmd(struct il_priv *il)
 {
     struct il3945_frame *frame;
     unsigned int frame_size;
     int rc;
     u8 rate;
 
     frame = il3945_get_free_frame(il);
 
     if (!frame) {
         IL_ERR("Could not obtain free frame buffer for beacon "
                "command.\n");
         return -ENOMEM;
     }
 
     rate = il_get_lowest_plcp(il);
 
     frame_size = il3945_hw_get_beacon_cmd(il, frame, rate);
 
     rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
 
     il3945_free_frame(il, frame);
 
     return rc;
 }
 
 static void
 il3945_unset_hw_params(struct il_priv *il)
 {
     if (il->_3945.shared_virt)
         dma_free_coherent(&il->pci_dev->dev,
                   sizeof(struct il3945_shared),
                   il->_3945.shared_virt, il->_3945.shared_phys);
 }
 
 static void
 il3945_build_tx_cmd_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
                  struct il_device_cmd *cmd,
                  struct sk_buff *skb_frag, int sta_id)
 {
     struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
     struct il_hw_key *keyinfo = &il->stations[sta_id].keyinfo;
 
     tx_cmd->sec_ctl = 0;
 
     switch (keyinfo->cipher) {
     case WLAN_CIPHER_SUITE_CCMP:
         tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
         memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
         D_TX("tx_cmd with AES hwcrypto\n");
         break;
 
     case WLAN_CIPHER_SUITE_TKIP:
         break;
 
     case WLAN_CIPHER_SUITE_WEP104:
         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
         fallthrough;
     case WLAN_CIPHER_SUITE_WEP40:
         tx_cmd->sec_ctl |=
             TX_CMD_SEC_WEP | (info->control.hw_key->
                       hw_key_idx & TX_CMD_SEC_MSK) <<
             TX_CMD_SEC_SHIFT;
 
         memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 
         D_TX("Configuring packet for WEP encryption " "with key %d\n",
              info->control.hw_key->hw_key_idx);
         break;
 
     default:
         IL_ERR("Unknown encode cipher %x\n", keyinfo->cipher);
         break;
     }
 }
 
 /*
  * handle build C_TX command notification.
  */
 static void
 il3945_build_tx_cmd_basic(struct il_priv *il, struct il_device_cmd *cmd,
               struct ieee80211_tx_info *info,
               struct ieee80211_hdr *hdr, u8 std_id)
 {
     struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
     __le32 tx_flags = tx_cmd->tx_flags;
     __le16 fc = hdr->frame_control;
 
     tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
     if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
         tx_flags |= TX_CMD_FLG_ACK_MSK;
         if (ieee80211_is_mgmt(fc))
             tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
         if (ieee80211_is_probe_resp(fc) &&
             !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
             tx_flags |= TX_CMD_FLG_TSF_MSK;
     } else {
         tx_flags &= (~TX_CMD_FLG_ACK_MSK);
         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
     }
 
     tx_cmd->sta_id = std_id;
     if (ieee80211_has_morefrags(fc))
         tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 
     if (ieee80211_is_data_qos(fc)) {
         u8 *qc = ieee80211_get_qos_ctl(hdr);
         tx_cmd->tid_tspec = qc[0] & 0xf;
         tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
     } else {
         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
     }
 
     il_tx_cmd_protection(il, info, fc, &tx_flags);
 
     tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
     if (ieee80211_is_mgmt(fc)) {
         if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
             tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
         else
             tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
     } else {
         tx_cmd->timeout.pm_frame_timeout = 0;
     }
 
     tx_cmd->driver_txop = 0;
     tx_cmd->tx_flags = tx_flags;
     tx_cmd->next_frame_len = 0;
 }
 
 /*
  * start C_TX command process
  */
 static int
 il3945_tx_skb(struct il_priv *il,
           struct ieee80211_sta *sta,
           struct sk_buff *skb)
 {
     struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
     struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
     struct il3945_tx_cmd *tx_cmd;
     struct il_tx_queue *txq = NULL;
     struct il_queue *q = NULL;
     struct il_device_cmd *out_cmd;
     struct il_cmd_meta *out_meta;
     dma_addr_t phys_addr;
     dma_addr_t txcmd_phys;
     int txq_id = skb_get_queue_mapping(skb);
     u16 len, idx, hdr_len;
     u16 firstlen, secondlen;
     u8 sta_id;
     u8 tid = 0;
     __le16 fc;
     u8 wait_write_ptr = 0;
     unsigned long flags;
 
     spin_lock_irqsave(&il->lock, flags);
     if (il_is_rfkill(il)) {
         D_DROP("Dropping - RF KILL\n");
         goto drop_unlock;
     }
 
     if ((ieee80211_get_tx_rate(il->hw, info)->hw_value & 0xFF) ==
         IL_INVALID_RATE) {
         IL_ERR("ERROR: No TX rate available.\n");
         goto drop_unlock;
     }
 
     fc = hdr->frame_control;
 
 #ifdef CONFIG_IWLEGACY_DEBUG
     if (ieee80211_is_auth(fc))
         D_TX("Sending AUTH frame\n");
     else if (ieee80211_is_assoc_req(fc))
         D_TX("Sending ASSOC frame\n");
     else if (ieee80211_is_reassoc_req(fc))
         D_TX("Sending REASSOC frame\n");
 #endif
 
     spin_unlock_irqrestore(&il->lock, flags);
 
     hdr_len = ieee80211_hdrlen(fc);
 
     /* Find idx into station table for destination station */
     sta_id = il_sta_id_or_broadcast(il, sta);
     if (sta_id == IL_INVALID_STATION) {
         D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
         goto drop;
     }
 
     D_RATE("station Id %d\n", sta_id);
 
     if (ieee80211_is_data_qos(fc)) {
         u8 *qc = ieee80211_get_qos_ctl(hdr);
         tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
         if (unlikely(tid >= MAX_TID_COUNT))
             goto drop;
     }
 
     /* Descriptor for chosen Tx queue */
     txq = &il->txq[txq_id];
     q = &txq->q;
 
     if ((il_queue_space(q) < q->high_mark))
         goto drop;
 
     spin_lock_irqsave(&il->lock, flags);
 
     idx = il_get_cmd_idx(q, q->write_ptr, 0);
 
     txq->skbs[q->write_ptr] = skb;
 
     /* Init first empty entry in queue's array of Tx/cmd buffers */
     out_cmd = txq->cmd[idx];
     out_meta = &txq->meta[idx];
     tx_cmd = (struct il3945_tx_cmd *)out_cmd->cmd.payload;
     memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
     memset(tx_cmd, 0, sizeof(*tx_cmd));
 
     /*
      * Set up the Tx-command (not MAC!) header.
      * Store the chosen Tx queue and TFD idx within the sequence field;
      * after Tx, uCode's Tx response will return this value so driver can
      * locate the frame within the tx queue and do post-tx processing.
      */
     out_cmd->hdr.cmd = C_TX;
     out_cmd->hdr.sequence =
         cpu_to_le16((u16)
             (QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
 
     /* Copy MAC header from skb into command buffer */
     memcpy(tx_cmd->hdr, hdr, hdr_len);
 
     if (info->control.hw_key)
         il3945_build_tx_cmd_hwcrypto(il, info, out_cmd, skb, sta_id);
 
     /* TODO need this for burst mode later on */
     il3945_build_tx_cmd_basic(il, out_cmd, info, hdr, sta_id);
 
     il3945_hw_build_tx_cmd_rate(il, out_cmd, info, hdr, sta_id);
 
     /* Total # bytes to be transmitted */
     tx_cmd->len = cpu_to_le16((u16) skb->len);
 
     tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
     tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 
     /*
      * Use the first empty entry in this queue's command buffer array
      * to contain the Tx command and MAC header concatenated together
      * (payload data will be in another buffer).
      * Size of this varies, due to varying MAC header length.
      * If end is not dword aligned, we'll have 2 extra bytes at the end
      * of the MAC header (device reads on dword boundaries).
      * We'll tell device about this padding later.
      */
     len =
         sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) +
         hdr_len;
     firstlen = (len + 3) & ~3;
 
     /* Physical address of this Tx command's header (not MAC header!),
      * within command buffer array. */
     txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen,
                     DMA_TO_DEVICE);
     if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys)))
         goto drop_unlock;
 
     /* Set up TFD's 2nd entry to point directly to remainder of skb,
      * if any (802.11 null frames have no payload). */
     secondlen = skb->len - hdr_len;
     if (secondlen > 0) {
         phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len,
                        secondlen, DMA_TO_DEVICE);
         if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr)))
             goto drop_unlock;
     }
 
     /* Add buffer containing Tx command and MAC(!) header to TFD's
      * first entry */
     il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
     dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
     dma_unmap_len_set(out_meta, len, firstlen);
     if (secondlen > 0)
         il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0,
                            U32_PAD(secondlen));
 
     if (!ieee80211_has_morefrags(hdr->frame_control)) {
         txq->need_update = 1;
     } else {
         wait_write_ptr = 1;
         txq->need_update = 0;
     }
 
     il_update_stats(il, true, fc, skb->len);
 
     D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
     D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
     il_print_hex_dump(il, IL_DL_TX, tx_cmd, sizeof(*tx_cmd));
     il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr,
               ieee80211_hdrlen(fc));
 
     /* Tell device the write idx *just past* this latest filled TFD */
     q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
     il_txq_update_write_ptr(il, txq);
     spin_unlock_irqrestore(&il->lock, flags);
 
     if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
         if (wait_write_ptr) {
             spin_lock_irqsave(&il->lock, flags);
             txq->need_update = 1;
             il_txq_update_write_ptr(il, txq);
             spin_unlock_irqrestore(&il->lock, flags);
         }
 
         il_stop_queue(il, txq);
     }
 
     return 0;
 
 drop_unlock:
     spin_unlock_irqrestore(&il->lock, flags);
 drop:
     return -1;
 }
 
 static int
 il3945_get_measurement(struct il_priv *il,
                struct ieee80211_measurement_params *params, u8 type)
 {
     struct il_spectrum_cmd spectrum;
     struct il_rx_pkt *pkt;
     struct il_host_cmd cmd = {
         .id = C_SPECTRUM_MEASUREMENT,
         .data = (void *)&spectrum,
         .flags = CMD_WANT_SKB,
     };
     u32 add_time = le64_to_cpu(params->start_time);
     int rc;
     int spectrum_resp_status;
     int duration = le16_to_cpu(params->duration);
 
     if (il_is_associated(il))
         add_time =
             il_usecs_to_beacons(il,
                     le64_to_cpu(params->start_time) -
                     il->_3945.last_tsf,
                     le16_to_cpu(il->timing.beacon_interval));
 
     memset(&spectrum, 0, sizeof(spectrum));
 
     spectrum.channel_count = cpu_to_le16(1);
     spectrum.flags =
         RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
     spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
     cmd.len = sizeof(spectrum);
     spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 
     if (il_is_associated(il))
         spectrum.start_time =
             il_add_beacon_time(il, il->_3945.last_beacon_time, add_time,
                        le16_to_cpu(il->timing.beacon_interval));
     else
         spectrum.start_time = 0;
 
     spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
     spectrum.channels[0].channel = params->channel;
     spectrum.channels[0].type = type;
     if (il->active.flags & RXON_FLG_BAND_24G_MSK)
         spectrum.flags |=
             RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
             RXON_FLG_TGG_PROTECT_MSK;
 
     rc = il_send_cmd_sync(il, &cmd);
     if (rc)
         return rc;
 
     pkt = (struct il_rx_pkt *)cmd.reply_page;
     if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
         IL_ERR("Bad return from N_RX_ON_ASSOC command\n");
         rc = -EIO;
     }
 
     spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
     switch (spectrum_resp_status) {
     case 0:     /* Command will be handled */
         if (pkt->u.spectrum.id != 0xff) {
             D_INFO("Replaced existing measurement: %d\n",
                    pkt->u.spectrum.id);
             il->measurement_status &= ~MEASUREMENT_READY;
         }
         il->measurement_status |= MEASUREMENT_ACTIVE;
         rc = 0;
         break;
 
     case 1:     /* Command will not be handled */
         rc = -EAGAIN;
         break;
     }
 
     il_free_pages(il, cmd.reply_page);
 
     return rc;
 }
 
 static void
 il3945_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
 {
     struct il_rx_pkt *pkt = rxb_addr(rxb);
     struct il_alive_resp *palive;
     struct delayed_work *pwork;
 
     palive = &pkt->u.alive_frame;
 
     D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
            palive->is_valid, palive->ver_type, palive->ver_subtype);
 
     if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
         D_INFO("Initialization Alive received.\n");
         memcpy(&il->card_alive_init, &pkt->u.alive_frame,
                sizeof(struct il_alive_resp));
         pwork = &il->init_alive_start;
     } else {
         D_INFO("Runtime Alive received.\n");
         memcpy(&il->card_alive, &pkt->u.alive_frame,
                sizeof(struct il_alive_resp));
         pwork = &il->alive_start;
         il3945_disable_events(il);
     }
 
     /* We delay the ALIVE response by 5ms to
      * give the HW RF Kill time to activate... */
     if (palive->is_valid == UCODE_VALID_OK)
         queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
     else
         IL_WARN("uCode did not respond OK.\n");
 }
 
 static void
 il3945_hdl_add_sta(struct il_priv *il, struct il_rx_buf *rxb)
 {
     struct il_rx_pkt *pkt = rxb_addr(rxb);
 
     D_RX("Received C_ADD_STA: 0x%02X\n", pkt->u.status);
 }
 
 static void
 il3945_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
 {
     struct il_rx_pkt *pkt = rxb_addr(rxb);
     struct il3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 #ifdef CONFIG_IWLEGACY_DEBUG
     u8 rate = beacon->beacon_notify_hdr.rate;
 
     D_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n",
          le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
          beacon->beacon_notify_hdr.failure_frame,
          le32_to_cpu(beacon->ibss_mgr_status),
          le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
 #endif
 
     il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 
 }
 
 /* Handle notification from uCode that card's power state is changing
  * due to software, hardware, or critical temperature RFKILL */
 static void
 il3945_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
 {
     struct il_rx_pkt *pkt = rxb_addr(rxb);
     u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
     unsigned long status = il->status;
 
     IL_WARN("Card state received: HW:%s SW:%s\n",
         (flags & HW_CARD_DISABLED) ? "Kill" : "On",
         (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 
     _il_wr(il, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 
     if (flags & HW_CARD_DISABLED)
         set_bit(S_RFKILL, &il->status);
     else
         clear_bit(S_RFKILL, &il->status);
 
     il_scan_cancel(il);
 
     if ((test_bit(S_RFKILL, &status) !=
          test_bit(S_RFKILL, &il->status)))
         wiphy_rfkill_set_hw_state(il->hw->wiphy,
                       test_bit(S_RFKILL, &il->status));
     else
         wake_up(&il->wait_command_queue);
 }
 
 /*
  * il3945_setup_handlers - Initialize Rx handler callbacks
  *
  * Setup the RX handlers for each of the reply types sent from the uCode
  * to the host.
  *
  * This function chains into the hardware specific files for them to setup
  * any hardware specific handlers as well.
  */
 static void
 il3945_setup_handlers(struct il_priv *il)
 {
     il->handlers[N_ALIVE] = il3945_hdl_alive;
     il->handlers[C_ADD_STA] = il3945_hdl_add_sta;
     il->handlers[N_ERROR] = il_hdl_error;
     il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
     il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
     il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
     il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
     il->handlers[N_BEACON] = il3945_hdl_beacon;
 
     /*
      * The same handler is used for both the REPLY to a discrete
      * stats request from the host as well as for the periodic
      * stats notifications (after received beacons) from the uCode.
      */
     il->handlers[C_STATS] = il3945_hdl_c_stats;
     il->handlers[N_STATS] = il3945_hdl_stats;
 
     il_setup_rx_scan_handlers(il);
     il->handlers[N_CARD_STATE] = il3945_hdl_card_state;
 
     /* Set up hardware specific Rx handlers */
     il3945_hw_handler_setup(il);
 }
 
 /************************** RX-FUNCTIONS ****************************/
 /*
  * Rx theory of operation
  *
  * The host allocates 32 DMA target addresses and passes the host address
  * to the firmware at register IL_RFDS_TBL_LOWER + N * RFD_SIZE where N is
  * 0 to 31
  *
  * Rx Queue Indexes
  * The host/firmware share two idx registers for managing the Rx buffers.
  *
  * The READ idx maps to the first position that the firmware may be writing
  * to -- the driver can read up to (but not including) this position and get
  * good data.
  * The READ idx is managed by the firmware once the card is enabled.
  *
  * The WRITE idx maps to the last position the driver has read from -- the
  * position preceding WRITE is the last slot the firmware can place a packet.
  *
  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
  * WRITE = READ.
  *
  * During initialization, the host sets up the READ queue position to the first
  * IDX position, and WRITE to the last (READ - 1 wrapped)
  *
  * When the firmware places a packet in a buffer, it will advance the READ idx
  * and fire the RX interrupt.  The driver can then query the READ idx and
  * process as many packets as possible, moving the WRITE idx forward as it
  * resets the Rx queue buffers with new memory.
  *
  * The management in the driver is as follows:
  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
  *   to replenish the iwl->rxq->rx_free.
  * + In il3945_rx_replenish (scheduled) if 'processed' != 'read' then the
  *   iwl->rxq is replenished and the READ IDX is updated (updating the
  *   'processed' and 'read' driver idxes as well)
  * + A received packet is processed and handed to the kernel network stack,
  *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
  *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
  *   were enough free buffers and RX_STALLED is set it is cleared.
  *
  *
  * Driver sequence:
  *
  * il3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
  *                            il3945_rx_queue_restock
  * il3945_rx_queue_restock() Moves available buffers from rx_free into Rx
  *                            queue, updates firmware pointers, and updates
  *                            the WRITE idx.  If insufficient rx_free buffers
  *                            are available, schedules il3945_rx_replenish
  *
  * -- enable interrupts --
  * ISR - il3945_rx()         Detach il_rx_bufs from pool up to the
  *                            READ IDX, detaching the SKB from the pool.
  *                            Moves the packet buffer from queue to rx_used.
  *                            Calls il3945_rx_queue_restock to refill any empty
  *                            slots.
  * ...
  *
  */
 
 /*
  * il3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
  */
 static inline __le32
 il3945_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
 {
     return cpu_to_le32((u32) dma_addr);
 }
 
 /*
  * il3945_rx_queue_restock - refill RX queue from pre-allocated pool
  *
  * If there are slots in the RX queue that need to be restocked,
  * and we have free pre-allocated buffers, fill the ranks as much
  * as we can, pulling from rx_free.
  *
  * This moves the 'write' idx forward to catch up with 'processed', and
  * also updates the memory address in the firmware to reference the new
  * target buffer.
  */
 static void
 il3945_rx_queue_restock(struct il_priv *il)
 {
     struct il_rx_queue *rxq = &il->rxq;
     struct list_head *element;
     struct il_rx_buf *rxb;
     unsigned long flags;
 
     spin_lock_irqsave(&rxq->lock, flags);
     while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
         /* Get next free Rx buffer, remove from free list */
         element = rxq->rx_free.next;
         rxb = list_entry(element, struct il_rx_buf, list);
         list_del(element);
 
         /* Point to Rx buffer via next RBD in circular buffer */
         rxq->bd[rxq->write] =
             il3945_dma_addr2rbd_ptr(il, rxb->page_dma);
         rxq->queue[rxq->write] = rxb;
         rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
         rxq->free_count--;
     }
     spin_unlock_irqrestore(&rxq->lock, flags);
     /* If the pre-allocated buffer pool is dropping low, schedule to
      * refill it */
     if (rxq->free_count <= RX_LOW_WATERMARK)
         queue_work(il->workqueue, &il->rx_replenish);
 
     /* If we've added more space for the firmware to place data, tell it.
      * Increment device's write pointer in multiples of 8. */
     if (rxq->write_actual != (rxq->write & ~0x7) ||
         abs(rxq->write - rxq->read) > 7) {
         spin_lock_irqsave(&rxq->lock, flags);
         rxq->need_update = 1;
         spin_unlock_irqrestore(&rxq->lock, flags);
         il_rx_queue_update_write_ptr(il, rxq);
     }
 }
 
 /*
  * il3945_rx_replenish - Move all used packet from rx_used to rx_free
  *
  * When moving to rx_free an SKB is allocated for the slot.
  *
  * Also restock the Rx queue via il3945_rx_queue_restock.
  * This is called as a scheduled work item (except for during initialization)
  */
 static void
 il3945_rx_allocate(struct il_priv *il, gfp_t priority)
 {
     struct il_rx_queue *rxq = &il->rxq;
     struct list_head *element;
     struct il_rx_buf *rxb;
     struct page *page;
     dma_addr_t page_dma;
     unsigned long flags;
     gfp_t gfp_mask = priority;
 
     while (1) {
         spin_lock_irqsave(&rxq->lock, flags);
         if (list_empty(&rxq->rx_used)) {
             spin_unlock_irqrestore(&rxq->lock, flags);
             return;
         }
         spin_unlock_irqrestore(&rxq->lock, flags);
 
         if (rxq->free_count > RX_LOW_WATERMARK)
             gfp_mask |= __GFP_NOWARN;
 
         if (il->hw_params.rx_page_order > 0)
             gfp_mask |= __GFP_COMP;
 
         /* Alloc a new receive buffer */
         page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
         if (!page) {
             if (net_ratelimit())
                 D_INFO("Failed to allocate SKB buffer.\n");
             if (rxq->free_count <= RX_LOW_WATERMARK &&
                 net_ratelimit())
                 IL_ERR("Failed to allocate SKB buffer with %0x."
                        "Only %u free buffers remaining.\n",
                        priority, rxq->free_count);
             /* We don't reschedule replenish work here -- we will
              * call the restock method and if it still needs
              * more buffers it will schedule replenish */
             break;
         }
 
         /* Get physical address of RB/SKB */
         page_dma =
             dma_map_page(&il->pci_dev->dev, page, 0,
                  PAGE_SIZE << il->hw_params.rx_page_order,
                  DMA_FROM_DEVICE);
 
         if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) {
             __free_pages(page, il->hw_params.rx_page_order);
             break;
         }
 
         spin_lock_irqsave(&rxq->lock, flags);
 
         if (list_empty(&rxq->rx_used)) {
             spin_unlock_irqrestore(&rxq->lock, flags);
             dma_unmap_page(&il->pci_dev->dev, page_dma,
                        PAGE_SIZE << il->hw_params.rx_page_order,
                        DMA_FROM_DEVICE);
             __free_pages(page, il->hw_params.rx_page_order);
             return;
         }
 
         element = rxq->rx_used.next;
         rxb = list_entry(element, struct il_rx_buf, list);
         list_del(element);
 
         rxb->page = page;
         rxb->page_dma = page_dma;
         list_add_tail(&rxb->list, &rxq->rx_free);
         rxq->free_count++;
         il->alloc_rxb_page++;
 
         spin_unlock_irqrestore(&rxq->lock, flags);
     }
 }
 
 void
 il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
 {
     unsigned long flags;
     int i;
     spin_lock_irqsave(&rxq->lock, flags);
     INIT_LIST_HEAD(&rxq->rx_free);
     INIT_LIST_HEAD(&rxq->rx_used);
     /* Fill the rx_used queue with _all_ of the Rx buffers */
     for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
         /* In the reset function, these buffers may have been allocated
          * to an SKB, so we need to unmap and free potential storage */
         if (rxq->pool[i].page != NULL) {
             dma_unmap_page(&il->pci_dev->dev,
                        rxq->pool[i].page_dma,
                        PAGE_SIZE << il->hw_params.rx_page_order,
                        DMA_FROM_DEVICE);
             __il_free_pages(il, rxq->pool[i].page);
             rxq->pool[i].page = NULL;
         }
         list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
     }
 
     /* Set us so that we have processed and used all buffers, but have
      * not restocked the Rx queue with fresh buffers */
     rxq->read = rxq->write = 0;
     rxq->write_actual = 0;
     rxq->free_count = 0;
     spin_unlock_irqrestore(&rxq->lock, flags);
 }
 
 void
 il3945_rx_replenish(void *data)
 {
     struct il_priv *il = data;
     unsigned long flags;
 
     il3945_rx_allocate(il, GFP_KERNEL);
 
     spin_lock_irqsave(&il->lock, flags);
     il3945_rx_queue_restock(il);
     spin_unlock_irqrestore(&il->lock, flags);
 }
 
 static void
 il3945_rx_replenish_now(struct il_priv *il)
 {
     il3945_rx_allocate(il, GFP_ATOMIC);
 
     il3945_rx_queue_restock(il);
 }
 
 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
  * This free routine walks the list of POOL entries and if SKB is set to
  * non NULL it is unmapped and freed
  */
 static void
 il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
 {
     int i;
     for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
         if (rxq->pool[i].page != NULL) {
             dma_unmap_page(&il->pci_dev->dev,
                        rxq->pool[i].page_dma,
                        PAGE_SIZE << il->hw_params.rx_page_order,
                        DMA_FROM_DEVICE);
             __il_free_pages(il, rxq->pool[i].page);
             rxq->pool[i].page = NULL;
         }
     }
 
     dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
               rxq->bd_dma);
     dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
               rxq->rb_stts, rxq->rb_stts_dma);
     rxq->bd = NULL;
     rxq->rb_stts = NULL;
 }
 
 /* Convert linear signal-to-noise ratio into dB */
 static u8 ratio2dB[100] = {
 /*   0   1   2   3   4   5   6   7   8   9 */
     0, 0, 6, 10, 12, 14, 16, 17, 18, 19,    /* 00 - 09 */
     20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
     26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
     29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
     32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
     34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
     36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
     37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
     38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
     39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
 };
 
 /* Calculates a relative dB value from a ratio of linear
  *   (i.e. not dB) signal levels.
  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
 int
 il3945_calc_db_from_ratio(int sig_ratio)
 {
     /* 1000:1 or higher just report as 60 dB */
     if (sig_ratio >= 1000)
         return 60;
 
     /* 100:1 or higher, divide by 10 and use table,
      *   add 20 dB to make up for divide by 10 */
     if (sig_ratio >= 100)
         return 20 + (int)ratio2dB[sig_ratio / 10];
 
     /* We shouldn't see this */
     if (sig_ratio < 1)
         return 0;
 
     /* Use table for ratios 1:1 - 99:1 */
     return (int)ratio2dB[sig_ratio];
 }
 
 /*
  * il3945_rx_handle - Main entry function for receiving responses from uCode
  *
  * Uses the il->handlers callback function array to invoke
  * the appropriate handlers, including command responses,
  * frame-received notifications, and other notifications.
  */
 static void
 il3945_rx_handle(struct il_priv *il)
 {
     struct il_rx_buf *rxb;
     struct il_rx_pkt *pkt;
     struct il_rx_queue *rxq = &il->rxq;
     u32 r, i;
     int reclaim;
     unsigned long flags;
     u8 fill_rx = 0;
     u32 count = 8;
     int total_empty = 0;
 
     /* uCode's read idx (stored in shared DRAM) indicates the last Rx
      * buffer that the driver may process (last buffer filled by ucode). */
     r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
     i = rxq->read;
 
     /* calculate total frames need to be restock after handling RX */
     total_empty = r - rxq->write_actual;
     if (total_empty < 0)
         total_empty += RX_QUEUE_SIZE;
 
     if (total_empty > (RX_QUEUE_SIZE / 2))
         fill_rx = 1;
     /* Rx interrupt, but nothing sent from uCode */
     if (i == r)
         D_RX("r = %d, i = %d\n", r, i);
 
     while (i != r) {
         int len;
 
         rxb = rxq->queue[i];
 
         /* If an RXB doesn't have a Rx queue slot associated with it,
          * then a bug has been introduced in the queue refilling
          * routines -- catch it here */
         BUG_ON(rxb == NULL);
 
         rxq->queue[i] = NULL;
 
         dma_unmap_page(&il->pci_dev->dev, rxb->page_dma,
                    PAGE_SIZE << il->hw_params.rx_page_order,
                    DMA_FROM_DEVICE);
         pkt = rxb_addr(rxb);
 
         len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
         len += sizeof(u32); /* account for status word */
 
         reclaim = il_need_reclaim(il, pkt);
 
         /* Based on type of command response or notification,
          *   handle those that need handling via function in
          *   handlers table.  See il3945_setup_handlers() */
         if (il->handlers[pkt->hdr.cmd]) {
             D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
                  il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
             il->isr_stats.handlers[pkt->hdr.cmd]++;
             il->handlers[pkt->hdr.cmd] (il, rxb);
         } else {
             /* No handling needed */
             D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
                  i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
         }
 
         /*
          * XXX: After here, we should always check rxb->page
          * against NULL before touching it or its virtual
          * memory (pkt). Because some handler might have
          * already taken or freed the pages.
          */
 
         if (reclaim) {
             /* Invoke any callbacks, transfer the buffer to caller,
              * and fire off the (possibly) blocking il_send_cmd()
              * as we reclaim the driver command queue */
             if (rxb->page)
                 il_tx_cmd_complete(il, rxb);
             else
                 IL_WARN("Claim null rxb?\n");
         }
 
         /* Reuse the page if possible. For notification packets and
          * SKBs that fail to Rx correctly, add them back into the
          * rx_free list for reuse later. */
         spin_lock_irqsave(&rxq->lock, flags);
         if (rxb->page != NULL) {
             rxb->page_dma =
                 dma_map_page(&il->pci_dev->dev, rxb->page, 0,
                      PAGE_SIZE << il->hw_params.rx_page_order,
                      DMA_FROM_DEVICE);
             if (unlikely(dma_mapping_error(&il->pci_dev->dev,
                                rxb->page_dma))) {
                 __il_free_pages(il, rxb->page);
                 rxb->page = NULL;
                 list_add_tail(&rxb->list, &rxq->rx_used);
             } else {
                 list_add_tail(&rxb->list, &rxq->rx_free);
                 rxq->free_count++;
             }
         } else
             list_add_tail(&rxb->list, &rxq->rx_used);
 
         spin_unlock_irqrestore(&rxq->lock, flags);
 
         i = (i + 1) & RX_QUEUE_MASK;
         /* If there are a lot of unused frames,
          * restock the Rx queue so ucode won't assert. */
         if (fill_rx) {
             count++;
             if (count >= 8) {
                 rxq->read = i;
                 il3945_rx_replenish_now(il);
                 count = 0;
             }
         }
     }
 
     /* Backtrack one entry */
     rxq->read = i;
     if (fill_rx)
         il3945_rx_replenish_now(il);
     else
         il3945_rx_queue_restock(il);
 }
 
 /* call this function to flush any scheduled tasklet */
 static inline void
 il3945_synchronize_irq(struct il_priv *il)
 {
     /* wait to make sure we flush pending tasklet */
     synchronize_irq(il->pci_dev->irq);
     tasklet_kill(&il->irq_tasklet);
 }
 
 static const char *
 il3945_desc_lookup(int i)
 {
     switch (i) {
     case 1:
         return "FAIL";
     case 2:
         return "BAD_PARAM";
     case 3:
         return "BAD_CHECKSUM";
     case 4:
         return "NMI_INTERRUPT";
     case 5:
         return "SYSASSERT";
     case 6:
         return "FATAL_ERROR";
     }
 
     return "UNKNOWN";
 }
 
 #define ERROR_START_OFFSET  (1 * sizeof(u32))
 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
 
 void
 il3945_dump_nic_error_log(struct il_priv *il)
 {
     u32 i;
     u32 desc, time, count, base, data1;
     u32 blink1, blink2, ilink1, ilink2;
 
     base = le32_to_cpu(il->card_alive.error_event_table_ptr);
 
     if (!il3945_hw_valid_rtc_data_addr(base)) {
         IL_ERR("Not valid error log pointer 0x%08X\n", base);
         return;
     }
 
     count = il_read_targ_mem(il, base);
 
     if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
         IL_ERR("Start IWL Error Log Dump:\n");
         IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
     }
 
     IL_ERR("Desc       Time       asrtPC  blink2 "
            "ilink1  nmiPC   Line\n");
     for (i = ERROR_START_OFFSET;
          i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
          i += ERROR_ELEM_SIZE) {
         desc = il_read_targ_mem(il, base + i);
         time = il_read_targ_mem(il, base + i + 1 * sizeof(u32));
         blink1 = il_read_targ_mem(il, base + i + 2 * sizeof(u32));
         blink2 = il_read_targ_mem(il, base + i + 3 * sizeof(u32));
         ilink1 = il_read_targ_mem(il, base + i + 4 * sizeof(u32));
         ilink2 = il_read_targ_mem(il, base + i + 5 * sizeof(u32));
         data1 = il_read_targ_mem(il, base + i + 6 * sizeof(u32));
 
         IL_ERR("%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
                il3945_desc_lookup(desc), desc, time, blink1, blink2,
                ilink1, ilink2, data1);
     }
 }
 
 static void
 il3945_irq_tasklet(struct tasklet_struct *t)
 {
     struct il_priv *il = from_tasklet(il, t, irq_tasklet);
     u32 inta, handled = 0;
     u32 inta_fh;
     unsigned long flags;
 #ifdef CONFIG_IWLEGACY_DEBUG
     u32 inta_mask;
 #endif
 
     spin_lock_irqsave(&il->lock, flags);
 
     /* Ack/clear/reset pending uCode interrupts.
      * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
      *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
     inta = _il_rd(il, CSR_INT);
     _il_wr(il, CSR_INT, inta);
 
     /* Ack/clear/reset pending flow-handler (DMA) interrupts.
      * Any new interrupts that happen after this, either while we're
      * in this tasklet, or later, will show up in next ISR/tasklet. */
     inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
     _il_wr(il, CSR_FH_INT_STATUS, inta_fh);
 
 #ifdef CONFIG_IWLEGACY_DEBUG
     if (il_get_debug_level(il) & IL_DL_ISR) {
         /* just for debug */
         inta_mask = _il_rd(il, CSR_INT_MASK);
         D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
               inta_mask, inta_fh);
     }
 #endif
 
     spin_unlock_irqrestore(&il->lock, flags);
 
     /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
      * atomic, make sure that inta covers all the interrupts that
      * we've discovered, even if FH interrupt came in just after
      * reading CSR_INT. */
     if (inta_fh & CSR39_FH_INT_RX_MASK)
         inta |= CSR_INT_BIT_FH_RX;
     if (inta_fh & CSR39_FH_INT_TX_MASK)
         inta |= CSR_INT_BIT_FH_TX;
 
     /* Now service all interrupt bits discovered above. */
     if (inta & CSR_INT_BIT_HW_ERR) {
         IL_ERR("Hardware error detected.  Restarting.\n");
 
         /* Tell the device to stop sending interrupts */
         il_disable_interrupts(il);
 
         il->isr_stats.hw++;
         il_irq_handle_error(il);
 
         handled |= CSR_INT_BIT_HW_ERR;
 
         return;
     }
 #ifdef CONFIG_IWLEGACY_DEBUG
     if (il_get_debug_level(il) & (IL_DL_ISR)) {
         /* NIC fires this, but we don't use it, redundant with WAKEUP */
         if (inta & CSR_INT_BIT_SCD) {
             D_ISR("Scheduler finished to transmit "
                   "the frame/frames.\n");
             il->isr_stats.sch++;
         }
 
         /* Alive notification via Rx interrupt will do the real work */
         if (inta & CSR_INT_BIT_ALIVE) {
             D_ISR("Alive interrupt\n");
             il->isr_stats.alive++;
         }
     }
 #endif
     /* Safely ignore these bits for debug checks below */
     inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
 
     /* Error detected by uCode */
     if (inta & CSR_INT_BIT_SW_ERR) {
         IL_ERR("Microcode SW error detected. " "Restarting 0x%X.\n",
                inta);
         il->isr_stats.sw++;
         il_irq_handle_error(il);
         handled |= CSR_INT_BIT_SW_ERR;
     }
 
     /* uCode wakes up after power-down sleep */
     if (inta & CSR_INT_BIT_WAKEUP) {
         D_ISR("Wakeup interrupt\n");
         il_rx_queue_update_write_ptr(il, &il->rxq);
 
         spin_lock_irqsave(&il->lock, flags);
         il_txq_update_write_ptr(il, &il->txq[0]);
         il_txq_update_write_ptr(il, &il->txq[1]);
         il_txq_update_write_ptr(il, &il->txq[2]);
         il_txq_update_write_ptr(il, &il->txq[3]);
         il_txq_update_write_ptr(il, &il->txq[4]);
         spin_unlock_irqrestore(&il->lock, flags);
 
         il->isr_stats.wakeup++;
         handled |= CSR_INT_BIT_WAKEUP;
     }
 
     /* All uCode command responses, including Tx command responses,
      * Rx "responses" (frame-received notification), and other
      * notifications from uCode come through here*/
     if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
         il3945_rx_handle(il);
         il->isr_stats.rx++;
         handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
     }
 
     if (inta & CSR_INT_BIT_FH_TX) {
         D_ISR("Tx interrupt\n");
         il->isr_stats.tx++;
 
         _il_wr(il, CSR_FH_INT_STATUS, (1 << 6));
         il_wr(il, FH39_TCSR_CREDIT(FH39_SRVC_CHNL), 0x0);
         handled |= CSR_INT_BIT_FH_TX;
     }
 
     if (inta & ~handled) {
         IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
         il->isr_stats.unhandled++;
     }
 
     if (inta & ~il->inta_mask) {
         IL_WARN("Disabled INTA bits 0x%08x were pending\n",
             inta & ~il->inta_mask);
         IL_WARN("   with inta_fh = 0x%08x\n", inta_fh);
     }
 
     /* Re-enable all interrupts */
     /* only Re-enable if disabled by irq */
     if (test_bit(S_INT_ENABLED, &il->status))
         il_enable_interrupts(il);
 
 #ifdef CONFIG_IWLEGACY_DEBUG
     if (il_get_debug_level(il) & (IL_DL_ISR)) {
         inta = _il_rd(il, CSR_INT);
         inta_mask = _il_rd(il, CSR_INT_MASK);
         inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
         D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
               "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
     }
 #endif
 }
 
 static int
 il3945_get_channels_for_scan(struct il_priv *il, enum nl80211_band band,
                  u8 is_active, u8 n_probes,
                  struct il3945_scan_channel *scan_ch,
                  struct ieee80211_vif *vif)
 {
     struct ieee80211_channel *chan;
     const struct ieee80211_supported_band *sband;
     const struct il_channel_info *ch_info;
     u16 passive_dwell = 0;
     u16 active_dwell = 0;
     int added, i;
 
     sband = il_get_hw_mode(il, band);
     if (!sband)
         return 0;
 
     active_dwell = il_get_active_dwell_time(il, band, n_probes);
     passive_dwell = il_get_passive_dwell_time(il, band, vif);
 
     if (passive_dwell <= active_dwell)
         passive_dwell = active_dwell + 1;
 
     for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
         chan = il->scan_request->channels[i];
 
         if (chan->band != band)
             continue;
 
         scan_ch->channel = chan->hw_value;
 
         ch_info = il_get_channel_info(il, band, scan_ch->channel);
         if (!il_is_channel_valid(ch_info)) {
             D_SCAN("Channel %d is INVALID for this band.\n",
                    scan_ch->channel);
             continue;
         }
 
         scan_ch->active_dwell = cpu_to_le16(active_dwell);
         scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
         /* If passive , set up for auto-switch
          *  and use long active_dwell time.
          */
         if (!is_active || il_is_channel_passive(ch_info) ||
             (chan->flags & IEEE80211_CHAN_NO_IR)) {
             scan_ch->type = 0;  /* passive */
             if (IL_UCODE_API(il->ucode_ver) == 1)
                 scan_ch->active_dwell =
                     cpu_to_le16(passive_dwell - 1);
         } else {
             scan_ch->type = 1;  /* active */
         }
 
         /* Set direct probe bits. These may be used both for active
          * scan channels (probes gets sent right away),
          * or for passive channels (probes get se sent only after
          * hearing clear Rx packet).*/
         if (IL_UCODE_API(il->ucode_ver) >= 2) {
             if (n_probes)
                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
         } else {
             /* uCode v1 does not allow setting direct probe bits on
              * passive channel. */
             if ((scan_ch->type & 1) && n_probes)
                 scan_ch->type |= IL39_SCAN_PROBE_MASK(n_probes);
         }
 
         /* Set txpower levels to defaults */
         scan_ch->tpc.dsp_atten = 110;
         /* scan_pwr_info->tpc.dsp_atten; */
 
         /*scan_pwr_info->tpc.tx_gain; */
         if (band == NL80211_BAND_5GHZ)
             scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
         else {
             scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
             /* NOTE: if we were doing 6Mb OFDM for scans we'd use
              * power level:
              * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
              */
         }
 
         D_SCAN("Scanning %d [%s %d]\n", scan_ch->channel,
                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
                (scan_ch->type & 1) ? active_dwell : passive_dwell);
 
         scan_ch++;
         added++;
     }
 
     D_SCAN("total channels to scan %d\n", added);
     return added;
 }
 
 static void
 il3945_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
 {
     int i;
 
     for (i = 0; i < RATE_COUNT_LEGACY; i++) {
         rates[i].bitrate = il3945_rates[i].ieee * 5;
         rates[i].hw_value = i;  /* Rate scaling will work on idxes */
         rates[i].hw_value_short = i;
         rates[i].flags = 0;
         if (i > IL39_LAST_OFDM_RATE || i < IL_FIRST_OFDM_RATE) {
             /*
              * If CCK != 1M then set short preamble rate flag.
              */
             rates[i].flags |=
                 (il3945_rates[i].plcp ==
                  10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
         }
     }
 }
 
 /******************************************************************************
  *
  * uCode download functions
  *
  ******************************************************************************/
 
 static void
 il3945_dealloc_ucode_pci(struct il_priv *il)
 {
     il_free_fw_desc(il->pci_dev, &il->ucode_code);
     il_free_fw_desc(il->pci_dev, &il->ucode_data);
     il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
     il_free_fw_desc(il->pci_dev, &il->ucode_init);
     il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
     il_free_fw_desc(il->pci_dev, &il->ucode_boot);
 }
 
 /*
  * il3945_verify_inst_full - verify runtime uCode image in card vs. host,
  *     looking at all data.
  */
 static int
 il3945_verify_inst_full(struct il_priv *il, __le32 * image, u32 len)
 {
     u32 val;
     u32 save_len = len;
     int rc = 0;
     u32 errcnt;
 
     D_INFO("ucode inst image size is %u\n", len);
 
     il_wr(il, HBUS_TARG_MEM_RADDR, IL39_RTC_INST_LOWER_BOUND);
 
     errcnt = 0;
     for (; len > 0; len -= sizeof(u32), image++) {
         /* read data comes through single port, auto-incr addr */
         /* NOTE: Use the debugless read so we don't flood kernel log
          * if IL_DL_IO is set */
         val = _il_rd(il, HBUS_TARG_MEM_RDAT);
         if (val != le32_to_cpu(*image)) {
             IL_ERR("uCode INST section is invalid at "
                    "offset 0x%x, is 0x%x, s/b 0x%x\n",
                    save_len - len, val, le32_to_cpu(*image));
             rc = -EIO;
             errcnt++;
             if (errcnt >= 20)
                 break;
         }
     }
 
     if (!errcnt)
         D_INFO("ucode image in INSTRUCTION memory is good\n");
 
     return rc;
 }
 
 /*
  * il3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
  *   using sample data 100 bytes apart.  If these sample points are good,
  *   it's a pretty good bet that everything between them is good, too.
  */
 static int
 il3945_verify_inst_sparse(struct il_priv *il, __le32 * image, u32 len)
 {
     u32 val;
     int rc = 0;
     u32 errcnt = 0;
     u32 i;
 
     D_INFO("ucode inst image size is %u\n", len);
 
     for (i = 0; i < len; i += 100, image += 100 / sizeof(u32)) {
         /* read data comes through single port, auto-incr addr */
         /* NOTE: Use the debugless read so we don't flood kernel log
          * if IL_DL_IO is set */
         il_wr(il, HBUS_TARG_MEM_RADDR, i + IL39_RTC_INST_LOWER_BOUND);
         val = _il_rd(il, HBUS_TARG_MEM_RDAT);
         if (val != le32_to_cpu(*image)) {
 #if 0               /* Enable this if you want to see details */
             IL_ERR("uCode INST section is invalid at "
                    "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val,
                    *image);
 #endif
             rc = -EIO;
             errcnt++;
             if (errcnt >= 3)
                 break;
         }
     }
 
     return rc;
 }
 
 /*
  * il3945_verify_ucode - determine which instruction image is in SRAM,
  *    and verify its contents
  */
 static int
 il3945_verify_ucode(struct il_priv *il)
 {
     __le32 *image;
     u32 len;
     int rc = 0;
 
     /* Try bootstrap */
     image = (__le32 *) il->ucode_boot.v_addr;
     len = il->ucode_boot.len;
     rc = il3945_verify_inst_sparse(il, image, len);
     if (rc == 0) {
         D_INFO("Bootstrap uCode is good in inst SRAM\n");
         return 0;
     }
 
     /* Try initialize */
     image = (__le32 *) il->ucode_init.v_addr;
     len = il->ucode_init.len;
     rc = il3945_verify_inst_sparse(il, image, len);
     if (rc == 0) {
         D_INFO("Initialize uCode is good in inst SRAM\n");
         return 0;
     }
 
     /* Try runtime/protocol */
     image = (__le32 *) il->ucode_code.v_addr;
     len = il->ucode_code.len;
     rc = il3945_verify_inst_sparse(il, image, len);
     if (rc == 0) {
         D_INFO("Runtime uCode is good in inst SRAM\n");
         return 0;
     }
 
     IL_ERR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
 
     /* Since nothing seems to match, show first several data entries in
      * instruction SRAM, so maybe visual inspection will give a clue.
      * Selection of bootstrap image (vs. other images) is arbitrary. */
     image = (__le32 *) il->ucode_boot.v_addr;
     len = il->ucode_boot.len;
     rc = il3945_verify_inst_full(il, image, len);
 
     return rc;
 }
 
 static void
 il3945_nic_start(struct il_priv *il)
 {
     /* Remove all resets to allow NIC to operate */
     _il_wr(il, CSR_RESET, 0);
 }
 
 #define IL3945_UCODE_GET(item)                      \
 static u32 il3945_ucode_get_##item(const struct il_ucode_header *ucode)\
 {                                   \
     return le32_to_cpu(ucode->v1.item);             \
 }
 
 static u32
 il3945_ucode_get_header_size(u32 api_ver)
 {
     return 24;
 }
 
 static u8 *
 il3945_ucode_get_data(const struct il_ucode_header *ucode)
 {
     return (u8 *) ucode->v1.data;
 }
 
 IL3945_UCODE_GET(inst_size);
 IL3945_UCODE_GET(data_size);
 IL3945_UCODE_GET(init_size);
 IL3945_UCODE_GET(init_data_size);
 IL3945_UCODE_GET(boot_size);
 
 /*
  * il3945_read_ucode - Read uCode images from disk file.
  *
  * Copy into buffers for card to fetch via bus-mastering
  */
 static int
 il3945_read_ucode(struct il_priv *il)
 {
     const struct il_ucode_header *ucode;
     int ret = -EINVAL, idx;
     const struct firmware *ucode_raw;
     /* firmware file name contains uCode/driver compatibility version */
     const char *name_pre = il->cfg->fw_name_pre;
     const unsigned int api_max = il->cfg->ucode_api_max;
     const unsigned int api_min = il->cfg->ucode_api_min;
     char buf[25];
     u8 *src;
     size_t len;
     u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
 
     /* Ask kernel firmware_class module to get the boot firmware off disk.
      * request_firmware() is synchronous, file is in memory on return. */
     for (idx = api_max; idx >= api_min; idx--) {
         sprintf(buf, "%s%u%s", name_pre, idx, ".ucode");
         ret = request_firmware(&ucode_raw, buf, &il->pci_dev->dev);
         if (ret < 0) {
             IL_ERR("%s firmware file req failed: %d\n", buf, ret);
             if (ret == -ENOENT)
                 continue;
             else
                 goto error;
         } else {
             if (idx < api_max)
                 IL_ERR("Loaded firmware %s, "
                        "which is deprecated. "
                        " Please use API v%u instead.\n", buf,
                        api_max);
             D_INFO("Got firmware '%s' file "
                    "(%zd bytes) from disk\n", buf, ucode_raw->size);
             break;
         }
     }
 
     if (ret < 0)
         goto error;
 
     /* Make sure that we got at least our header! */
     if (ucode_raw->size < il3945_ucode_get_header_size(1)) {
         IL_ERR("File size way too small!\n");
         ret = -EINVAL;
         goto err_release;
     }
 
     /* Data from ucode file:  header followed by uCode images */
     ucode = (struct il_ucode_header *)ucode_raw->data;
 
     il->ucode_ver = le32_to_cpu(ucode->ver);
     api_ver = IL_UCODE_API(il->ucode_ver);
     inst_size = il3945_ucode_get_inst_size(ucode);
     data_size = il3945_ucode_get_data_size(ucode);
     init_size = il3945_ucode_get_init_size(ucode);
     init_data_size = il3945_ucode_get_init_data_size(ucode);
     boot_size = il3945_ucode_get_boot_size(ucode);
     src = il3945_ucode_get_data(ucode);
 
     /* api_ver should match the api version forming part of the
      * firmware filename ... but we don't check for that and only rely
      * on the API version read from firmware header from here on forward */
 
     if (api_ver < api_min || api_ver > api_max) {
         IL_ERR("Driver unable to support your firmware API. "
                "Driver supports v%u, firmware is v%u.\n", api_max,
                api_ver);
         il->ucode_ver = 0;
         ret = -EINVAL;
         goto err_release;
     }
     if (api_ver != api_max)
         IL_ERR("Firmware has old API version. Expected %u, "
                "got %u. New firmware can be obtained "
                "from http://www.intellinuxwireless.org.\n", api_max,
                api_ver);
 
     IL_INFO("loaded firmware version %u.%u.%u.%u\n",
         IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
         IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
 
     snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
          "%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
          IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
          IL_UCODE_SERIAL(il->ucode_ver));
 
     D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
     D_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
     D_INFO("f/w package hdr runtime data size = %u\n", data_size);
     D_INFO("f/w package hdr init inst size = %u\n", init_size);
     D_INFO("f/w package hdr init data size = %u\n", init_data_size);
     D_INFO("f/w package hdr boot inst size = %u\n", boot_size);
 
     /* Verify size of file vs. image size info in file's header */
     if (ucode_raw->size !=
         il3945_ucode_get_header_size(api_ver) + inst_size + data_size +
         init_size + init_data_size + boot_size) {
 
         D_INFO("uCode file size %zd does not match expected size\n",
                ucode_raw->size);
         ret = -EINVAL;
         goto err_release;
     }
 
     /* Verify that uCode images will fit in card's SRAM */
     if (inst_size > IL39_MAX_INST_SIZE) {
         D_INFO("uCode instr len %d too large to fit in\n", inst_size);
         ret = -EINVAL;
         goto err_release;
     }
 
     if (data_size > IL39_MAX_DATA_SIZE) {
         D_INFO("uCode data len %d too large to fit in\n", data_size);
         ret = -EINVAL;
         goto err_release;
     }
     if (init_size > IL39_MAX_INST_SIZE) {
         D_INFO("uCode init instr len %d too large to fit in\n",
                init_size);
         ret = -EINVAL;
         goto err_release;
     }
     if (init_data_size > IL39_MAX_DATA_SIZE) {
         D_INFO("uCode init data len %d too large to fit in\n",
                init_data_size);
         ret = -EINVAL;
         goto err_release;
     }
     if (boot_size > IL39_MAX_BSM_SIZE) {
         D_INFO("uCode boot instr len %d too large to fit in\n",
                boot_size);
         ret = -EINVAL;
         goto err_release;
     }
 
     /* Allocate ucode buffers for card's bus-master loading ... */
 
     /* Runtime instructions and 2 copies of data:
      * 1) unmodified from disk
      * 2) backup cache for save/restore during power-downs */
     il->ucode_code.len = inst_size;
     il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
 
     il->ucode_data.len = data_size;
     il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
 
     il->ucode_data_backup.len = data_size;
     il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
 
     if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
         !il->ucode_data_backup.v_addr)
         goto err_pci_alloc;
 
     /* Initialization instructions and data */
     if (init_size && init_data_size) {
         il->ucode_init.len = init_size;
         il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
 
         il->ucode_init_data.len = init_data_size;
         il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
 
         if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
             goto err_pci_alloc;
     }
 
     /* Bootstrap (instructions only, no data) */
     if (boot_size) {
         il->ucode_boot.len = boot_size;
         il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
 
         if (!il->ucode_boot.v_addr)
             goto err_pci_alloc;
     }
 
     /* Copy images into buffers for card's bus-master reads ... */
 
     /* Runtime instructions (first block of data in file) */
     len = inst_size;
     D_INFO("Copying (but not loading) uCode instr len %zd\n", len);
     memcpy(il->ucode_code.v_addr, src, len);
     src += len;
 
     D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
            il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
 
     /* Runtime data (2nd block)
      * NOTE:  Copy into backup buffer will be done in il3945_up()  */
     len = data_size;
     D_INFO("Copying (but not loading) uCode data len %zd\n", len);
     memcpy(il->ucode_data.v_addr, src, len);
     memcpy(il->ucode_data_backup.v_addr, src, len);
     src += len;
 
     /* Initialization instructions (3rd block) */
     if (init_size) {
         len = init_size;
         D_INFO("Copying (but not loading) init instr len %zd\n", len);
         memcpy(il->ucode_init.v_addr, src, len);
         src += len;
     }
 
     /* Initialization data (4th block) */
     if (init_data_size) {
         len = init_data_size;
         D_INFO("Copying (but not loading) init data len %zd\n", len);
         memcpy(il->ucode_init_data.v_addr, src, len);
         src += len;
     }
 
     /* Bootstrap instructions (5th block) */
     len = boot_size;
     D_INFO("Copying (but not loading) boot instr len %zd\n", len);
     memcpy(il->ucode_boot.v_addr, src, len);
 
     /* We have our copies now, allow OS release its copies */
     release_firmware(ucode_raw);
     return 0;
 
 err_pci_alloc:
     IL_ERR("failed to allocate pci memory\n");
     ret = -ENOMEM;
     il3945_dealloc_ucode_pci(il);
 
 err_release:
     release_firmware(ucode_raw);
 
 error:
     return ret;
 }
 
 /*
  * il3945_set_ucode_ptrs - Set uCode address location
  *
  * Tell initialization uCode where to find runtime uCode.
  *
  * BSM registers initially contain pointers to initialization uCode.
  * We need to replace them to load runtime uCode inst and data,
  * and to save runtime data when powering down.
  */
 static int
 il3945_set_ucode_ptrs(struct il_priv *il)
 {
     dma_addr_t pinst;
     dma_addr_t pdata;
 
     /* bits 31:0 for 3945 */
     pinst = il->ucode_code.p_addr;
     pdata = il->ucode_data_backup.p_addr;
 
     /* Tell bootstrap uCode where to find image to load */
     il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
     il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
     il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, il->ucode_data.len);
 
     /* Inst byte count must be last to set up, bit 31 signals uCode
      *   that all new ptr/size info is in place */
     il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG,
            il->ucode_code.len | BSM_DRAM_INST_LOAD);
 
     D_INFO("Runtime uCode pointers are set.\n");
 
     return 0;
 }
 
 /*
  * il3945_init_alive_start - Called after N_ALIVE notification received
  *
  * Called after N_ALIVE notification received from "initialize" uCode.
  *
  * Tell "initialize" uCode to go ahead and load the runtime uCode.
  */
 static void
 il3945_init_alive_start(struct il_priv *il)
 {
     /* Check alive response for "valid" sign from uCode */
     if (il->card_alive_init.is_valid != UCODE_VALID_OK) {
         /* We had an error bringing up the hardware, so take it
          * all the way back down so we can try again */
         D_INFO("Initialize Alive failed.\n");
         goto restart;
     }
 
     /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
      * This is a paranoid check, because we would not have gotten the
      * "initialize" alive if code weren't properly loaded.  */
     if (il3945_verify_ucode(il)) {
         /* Runtime instruction load was bad;
          * take it all the way back down so we can try again */
         D_INFO("Bad \"initialize\" uCode load.\n");
         goto restart;
     }
 
     /* Send pointers to protocol/runtime uCode image ... init code will
      * load and launch runtime uCode, which will send us another "Alive"
      * notification. */
     D_INFO("Initialization Alive received.\n");
     if (il3945_set_ucode_ptrs(il)) {
         /* Runtime instruction load won't happen;
          * take it all the way back down so we can try again */
         D_INFO("Couldn't set up uCode pointers.\n");
         goto restart;
     }
     return;
 
 restart:
     queue_work(il->workqueue, &il->restart);
 }
 
 /*
  * il3945_alive_start - called after N_ALIVE notification received
  *                   from protocol/runtime uCode (initialization uCode's
  *                   Alive gets handled by il3945_init_alive_start()).
  */
 static void
 il3945_alive_start(struct il_priv *il)
 {
     int thermal_spin = 0;
     u32 rfkill;
 
     D_INFO("Runtime Alive received.\n");
 
     if (il->card_alive.is_valid != UCODE_VALID_OK) {
         /* We had an error bringing up the hardware, so take it
          * all the way back down so we can try again */
         D_INFO("Alive failed.\n");
         goto restart;
     }
 
     /* Initialize uCode has loaded Runtime uCode ... verify inst image.
      * This is a paranoid check, because we would not have gotten the
      * "runtime" alive if code weren't properly loaded.  */
     if (il3945_verify_ucode(il)) {
         /* Runtime instruction load was bad;
          * take it all the way back down so we can try again */
         D_INFO("Bad runtime uCode load.\n");
         goto restart;
     }
 
     rfkill = il_rd_prph(il, APMG_RFKILL_REG);
     D_INFO("RFKILL status: 0x%x\n", rfkill);
 
     if (rfkill & 0x1) {
         clear_bit(S_RFKILL, &il->status);
         /* if RFKILL is not on, then wait for thermal
          * sensor in adapter to kick in */
         while (il3945_hw_get_temperature(il) == 0) {
             thermal_spin++;
             udelay(10);
         }
 
         if (thermal_spin)
             D_INFO("Thermal calibration took %dus\n",
                    thermal_spin * 10);
     } else
         set_bit(S_RFKILL, &il->status);
 
     /* After the ALIVE response, we can send commands to 3945 uCode */
     set_bit(S_ALIVE, &il->status);
 
     /* Enable watchdog to monitor the driver tx queues */
     il_setup_watchdog(il);
 
     if (il_is_rfkill(il))
         return;
 
     ieee80211_wake_queues(il->hw);
 
     il->active_rate = RATES_MASK_3945;
 
     il_power_update_mode(il, true);
 
     if (il_is_associated(il)) {
         struct il3945_rxon_cmd *active_rxon =
             (struct il3945_rxon_cmd *)(&il->active);
 
         il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
         active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
     } else {
         /* Initialize our rx_config data */
         il_connection_init_rx_config(il);
     }
 
     /* Configure Bluetooth device coexistence support */
     il_send_bt_config(il);
 
     set_bit(S_READY, &il->status);
 
     /* Configure the adapter for unassociated operation */
     il3945_commit_rxon(il);
 
     il3945_reg_txpower_periodic(il);
 
     D_INFO("ALIVE processing complete.\n");
     wake_up(&il->wait_command_queue);
 
     return;
 
 restart:
     queue_work(il->workqueue, &il->restart);
 }
 
 static void il3945_cancel_deferred_work(struct il_priv *il);
 
 static void
 __il3945_down(struct il_priv *il)
 {
     unsigned long flags;
     int exit_pending;
 
     D_INFO(DRV_NAME " is going down\n");
 
     il_scan_cancel_timeout(il, 200);
 
     exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
 
     /* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
      * to prevent rearm timer */
     del_timer_sync(&il->watchdog);
 
     /* Station information will now be cleared in device */
     il_clear_ucode_stations(il);
     il_dealloc_bcast_stations(il);
     il_clear_driver_stations(il);
 
     /* Unblock any waiting calls */
     wake_up_all(&il->wait_command_queue);
 
     /* Wipe out the EXIT_PENDING status bit if we are not actually
      * exiting the module */
     if (!exit_pending)
         clear_bit(S_EXIT_PENDING, &il->status);
 
     /* stop and reset the on-board processor */
     _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
 
     /* tell the device to stop sending interrupts */
     spin_lock_irqsave(&il->lock, flags);
     il_disable_interrupts(il);
     spin_unlock_irqrestore(&il->lock, flags);
     il3945_synchronize_irq(il);
 
     if (il->mac80211_registered)
         ieee80211_stop_queues(il->hw);
 
     /* If we have not previously called il3945_init() then
      * clear all bits but the RF Kill bits and return */
     if (!il_is_init(il)) {
         il->status =
             test_bit(S_RFKILL, &il->status) << S_RFKILL |
             test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
             test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
         goto exit;
     }
 
     /* ...otherwise clear out all the status bits but the RF Kill
      * bit and continue taking the NIC down. */
     il->status &=
         test_bit(S_RFKILL, &il->status) << S_RFKILL |
         test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
         test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
         test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
 
     /*
      * We disabled and synchronized interrupt, and priv->mutex is taken, so
      * here is the only thread which will program device registers, but
      * still have lockdep assertions, so we are taking reg_lock.
      */
     spin_lock_irq(&il->reg_lock);
     /* FIXME: il_grab_nic_access if rfkill is off ? */
 
     il3945_hw_txq_ctx_stop(il);
     il3945_hw_rxq_stop(il);
     /* Power-down device's busmaster DMA clocks */
     _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
     udelay(5);
     /* Stop the device, and put it in low power state */
     _il_apm_stop(il);
 
     spin_unlock_irq(&il->reg_lock);
 
     il3945_hw_txq_ctx_free(il);
 exit:
     memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
     dev_kfree_skb(il->beacon_skb);
     il->beacon_skb = NULL;
 
     /* clear out any free frames */
     il3945_clear_free_frames(il);
 }
 
 static void
 il3945_down(struct il_priv *il)
 {
     mutex_lock(&il->mutex);
     __il3945_down(il);
     mutex_unlock(&il->mutex);
 
     il3945_cancel_deferred_work(il);
 }
 
 #define MAX_HW_RESTARTS 5
 
 static int
 il3945_alloc_bcast_station(struct il_priv *il)
 {
     unsigned long flags;
     u8 sta_id;
 
     spin_lock_irqsave(&il->sta_lock, flags);
     sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
     if (sta_id == IL_INVALID_STATION) {
         IL_ERR("Unable to prepare broadcast station\n");
         spin_unlock_irqrestore(&il->sta_lock, flags);
 
         return -EINVAL;
     }
 
     il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
     il->stations[sta_id].used |= IL_STA_BCAST;
     spin_unlock_irqrestore(&il->sta_lock, flags);
 
     return 0;
 }
 
 static int
 __il3945_up(struct il_priv *il)
 {
     int rc, i;
 
     rc = il3945_alloc_bcast_station(il);
     if (rc)
         return rc;
 
     if (test_bit(S_EXIT_PENDING, &il->status)) {
         IL_WARN("Exit pending; will not bring the NIC up\n");
         return -EIO;
     }
 
     if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
         IL_ERR("ucode not available for device bring up\n");
         return -EIO;
     }
 
     /* If platform's RF_KILL switch is NOT set to KILL */
     if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
         clear_bit(S_RFKILL, &il->status);
     else {
         set_bit(S_RFKILL, &il->status);
         return -ERFKILL;
     }
 
     _il_wr(il, CSR_INT, 0xFFFFFFFF);
 
     rc = il3945_hw_nic_init(il);
     if (rc) {
         IL_ERR("Unable to int nic\n");
         return rc;
     }
 
     /* make sure rfkill handshake bits are cleared */
     _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
     _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 
     /* clear (again), then enable host interrupts */
     _il_wr(il, CSR_INT, 0xFFFFFFFF);
     il_enable_interrupts(il);
 
     /* really make sure rfkill handshake bits are cleared */
     _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
     _il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
 
     /* Copy original ucode data image from disk into backup cache.
      * This will be used to initialize the on-board processor's
      * data SRAM for a clean start when the runtime program first loads. */
     memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
            il->ucode_data.len);
 
     /* We return success when we resume from suspend and rf_kill is on. */
     if (test_bit(S_RFKILL, &il->status))
         return 0;
 
     for (i = 0; i < MAX_HW_RESTARTS; i++) {
 
         /* load bootstrap state machine,
          * load bootstrap program into processor's memory,
          * prepare to load the "initialize" uCode */
         rc = il->ops->load_ucode(il);
 
         if (rc) {
             IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);
             continue;
         }
 
         /* start card; "initialize" will load runtime ucode */
         il3945_nic_start(il);
 
         D_INFO(DRV_NAME " is coming up\n");
 
         return 0;
     }
 
     set_bit(S_EXIT_PENDING, &il->status);
     __il3945_down(il);
     clear_bit(S_EXIT_PENDING, &il->status);
 
     /* tried to restart and config the device for as long as our
      * patience could withstand */
     IL_ERR("Unable to initialize device after %d attempts.\n", i);
     return -EIO;
 }
 
 /*****************************************************************************
  *
  * Workqueue callbacks
  *
  *****************************************************************************/
 
 static void
 il3945_bg_init_alive_start(struct work_struct *data)
 {
     struct il_priv *il =
         container_of(data, struct il_priv, init_alive_start.work);
 
     mutex_lock(&il->mutex);
     if (test_bit(S_EXIT_PENDING, &il->status))
         goto out;
 
     il3945_init_alive_start(il);
 out:
     mutex_unlock(&il->mutex);
 }
 
 static void
 il3945_bg_alive_start(struct work_struct *data)
 {
     struct il_priv *il =
         container_of(data, struct il_priv, alive_start.work);
 
     mutex_lock(&il->mutex);
     if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
         goto out;
 
     il3945_alive_start(il);
 out:
     mutex_unlock(&il->mutex);
 }
 
 /*
  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
  * *is* readable even when device has been SW_RESET into low power mode
  * (e.g. during RF KILL).
  */
 static void
 il3945_rfkill_poll(struct work_struct *data)
 {
     struct il_priv *il =
         container_of(data, struct il_priv, _3945.rfkill_poll.work);
     bool old_rfkill = test_bit(S_RFKILL, &il->status);
     bool new_rfkill =
         !(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
 
     if (new_rfkill != old_rfkill) {
         if (new_rfkill)
             set_bit(S_RFKILL, &il->status);
         else
             clear_bit(S_RFKILL, &il->status);
 
         wiphy_rfkill_set_hw_state(il->hw->wiphy, new_rfkill);
 
         D_RF_KILL("RF_KILL bit toggled to %s.\n",
               new_rfkill ? "disable radio" : "enable radio");
     }
 
     /* Keep this running, even if radio now enabled.  This will be
      * cancelled in mac_start() if system decides to start again */
     queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
                round_jiffies_relative(2 * HZ));
 
 }
 
 int
 il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
 {
     struct il_host_cmd cmd = {
         .id = C_SCAN,
         .len = sizeof(struct il3945_scan_cmd),
         .flags = CMD_SIZE_HUGE,
     };
     struct il3945_scan_cmd *scan;
     u8 n_probes = 0;
     enum nl80211_band band;
     bool is_active = false;
     int ret;
     u16 len;
 
     lockdep_assert_held(&il->mutex);
 
     if (!il->scan_cmd) {
         il->scan_cmd =
             kmalloc(sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE,
                 GFP_KERNEL);
         if (!il->scan_cmd) {
             D_SCAN("Fail to allocate scan memory\n");
             return -ENOMEM;
         }
     }
     scan = il->scan_cmd;
     memset(scan, 0, sizeof(struct il3945_scan_cmd) + IL_MAX_SCAN_SIZE);
 
     scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
     scan->quiet_time = IL_ACTIVE_QUIET_TIME;
 
     if (il_is_associated(il)) {
         u16 interval;
         u32 extra;
         u32 suspend_time = 100;
         u32 scan_suspend_time = 100;
 
         D_INFO("Scanning while associated...\n");
 
         interval = vif->bss_conf.beacon_int;
 
         scan->suspend_time = 0;
         scan->max_out_time = cpu_to_le32(200 * 1024);
         if (!interval)
             interval = suspend_time;
         /*
          * suspend time format:
          *  0-19: beacon interval in usec (time before exec.)
          * 20-23: 0
          * 24-31: number of beacons (suspend between channels)
          */
 
         extra = (suspend_time / interval) << 24;
         scan_suspend_time =
             0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024));
 
         scan->suspend_time = cpu_to_le32(scan_suspend_time);
         D_SCAN("suspend_time 0x%X beacon interval %d\n",
                scan_suspend_time, interval);
     }
 
     if (il->scan_request->n_ssids) {
         int i, p = 0;
         D_SCAN("Kicking off active scan\n");
         for (i = 0; i < il->scan_request->n_ssids; i++) {
             /* always does wildcard anyway */
             if (!il->scan_request->ssids[i].ssid_len)
                 continue;
             scan->direct_scan[p].id = WLAN_EID_SSID;
             scan->direct_scan[p].len =
                 il->scan_request->ssids[i].ssid_len;
             memcpy(scan->direct_scan[p].ssid,
                    il->scan_request->ssids[i].ssid,
                    il->scan_request->ssids[i].ssid_len);
             n_probes++;
             p++;
         }
         is_active = true;
     } else
         D_SCAN("Kicking off passive scan.\n");
 
     /* We don't build a direct scan probe request; the uCode will do
      * that based on the direct_mask added to each channel entry */
     scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
     scan->tx_cmd.sta_id = il->hw_params.bcast_id;
     scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 
     /* flags + rate selection */
 
     switch (il->scan_band) {
     case NL80211_BAND_2GHZ:
         scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
         scan->tx_cmd.rate = RATE_1M_PLCP;
         band = NL80211_BAND_2GHZ;
         break;
     case NL80211_BAND_5GHZ:
         scan->tx_cmd.rate = RATE_6M_PLCP;
         band = NL80211_BAND_5GHZ;
         break;
     default:
         IL_WARN("Invalid scan band\n");
         return -EIO;
     }
 
     /*
      * If active scaning is requested but a certain channel is marked
      * passive, we can do active scanning if we detect transmissions. For
      * passive only scanning disable switching to active on any channel.
      */
     scan->good_CRC_th =
         is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
 
     len =
         il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
                   vif->addr, il->scan_request->ie,
                   il->scan_request->ie_len,
                   IL_MAX_SCAN_SIZE - sizeof(*scan));
     scan->tx_cmd.len = cpu_to_le16(len);
 
     /* select Rx antennas */
     scan->flags |= il3945_get_antenna_flags(il);
 
     scan->channel_count =
         il3945_get_channels_for_scan(il, band, is_active, n_probes,
                      (void *)&scan->data[len], vif);
     if (scan->channel_count == 0) {
         D_SCAN("channel count %d\n", scan->channel_count);
         return -EIO;
     }
 
     cmd.len +=
         le16_to_cpu(scan->tx_cmd.len) +
         scan->channel_count * sizeof(struct il3945_scan_channel);
     cmd.data = scan;
     scan->len = cpu_to_le16(cmd.len);
 
     set_bit(S_SCAN_HW, &il->status);
     ret = il_send_cmd_sync(il, &cmd);
     if (ret)
         clear_bit(S_SCAN_HW, &il->status);
     return ret;
 }
 
 void
 il3945_post_scan(struct il_priv *il)
 {
     /*
      * Since setting the RXON may have been deferred while
      * performing the scan, fire one off if needed
      */
     if (memcmp(&il->staging, &il->active, sizeof(il->staging)))
         il3945_commit_rxon(il);
 }
 
 static void
 il3945_bg_restart(struct work_struct *data)
 {
     struct il_priv *il = container_of(data, struct il_priv, restart);
 
     if (test_bit(S_EXIT_PENDING, &il->status))
         return;
 
     if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
         mutex_lock(&il->mutex);
         il->is_open = 0;
         mutex_unlock(&il->mutex);
         il3945_down(il);
         ieee80211_restart_hw(il->hw);
     } else {
         il3945_down(il);
 
         mutex_lock(&il->mutex);
         if (test_bit(S_EXIT_PENDING, &il->status)) {
             mutex_unlock(&il->mutex);
             return;
         }
 
         __il3945_up(il);
         mutex_unlock(&il->mutex);
     }
 }
 
 static void
 il3945_bg_rx_replenish(struct work_struct *data)
 {
     struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
 
     mutex_lock(&il->mutex);
     if (test_bit(S_EXIT_PENDING, &il->status))
         goto out;
 
     il3945_rx_replenish(il);
 out:
     mutex_unlock(&il->mutex);
 }
 
 void
 il3945_post_associate(struct il_priv *il)
 {
     int rc = 0;
 
     if (!il->vif || !il->is_open)
         return;
 
     D_ASSOC("Associated as %d to: %pM\n", il->vif->cfg.aid,
         il->active.bssid_addr);
 
     if (test_bit(S_EXIT_PENDING, &il->status))
         return;
 
     il_scan_cancel_timeout(il, 200);
 
     il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
     il3945_commit_rxon(il);
 
     rc = il_send_rxon_timing(il);
     if (rc)
         IL_WARN("C_RXON_TIMING failed - " "Attempting to continue.\n");
 
     il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 
     il->staging.assoc_id = cpu_to_le16(il->vif->cfg.aid);
 
     D_ASSOC("assoc id %d beacon interval %d\n", il->vif->cfg.aid,
         il->vif->bss_conf.beacon_int);
 
     if (il->vif->bss_conf.use_short_preamble)
         il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
     else
         il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 
     if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
         if (il->vif->bss_conf.use_short_slot)
             il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
         else
             il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
     }
 
     il3945_commit_rxon(il);
 
     switch (il->vif->type) {
     case NL80211_IFTYPE_STATION:
         il3945_rate_scale_init(il->hw, IL_AP_ID);
         break;
     case NL80211_IFTYPE_ADHOC:
         il3945_send_beacon_cmd(il);
         break;
     default:
         IL_ERR("%s Should not be called in %d mode\n", __func__,
               il->vif->type);
         break;
     }
 }
 
 /*****************************************************************************
  *
  * mac80211 entry point functions
  *
  *****************************************************************************/
 
 #define UCODE_READY_TIMEOUT (2 * HZ)
 
 static int
 il3945_mac_start(struct ieee80211_hw *hw)
 {
     struct il_priv *il = hw->priv;
     int ret;
 
     /* we should be verifying the device is ready to be opened */
     mutex_lock(&il->mutex);
     D_MAC80211("enter\n");
 
     /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
      * ucode filename and max sizes are card-specific. */
 
     if (!il->ucode_code.len) {
         ret = il3945_read_ucode(il);
         if (ret) {
             IL_ERR("Could not read microcode: %d\n", ret);
             mutex_unlock(&il->mutex);
             goto out_release_irq;
         }
     }
 
     ret = __il3945_up(il);
 
     mutex_unlock(&il->mutex);
 
     if (ret)
         goto out_release_irq;
 
     D_INFO("Start UP work.\n");
 
     /* Wait for START_ALIVE from ucode. Otherwise callbacks from
      * mac80211 will not be run successfully. */
     ret = wait_event_timeout(il->wait_command_queue,
                  test_bit(S_READY, &il->status),
                  UCODE_READY_TIMEOUT);
     if (!ret) {
         if (!test_bit(S_READY, &il->status)) {
             IL_ERR("Wait for START_ALIVE timeout after %dms.\n",
                    jiffies_to_msecs(UCODE_READY_TIMEOUT));
             ret = -ETIMEDOUT;
             goto out_release_irq;
         }
     }
 
     /* ucode is running and will send rfkill notifications,
      * no need to poll the killswitch state anymore */
     cancel_delayed_work(&il->_3945.rfkill_poll);
 
     il->is_open = 1;
     D_MAC80211("leave\n");
     return 0;
 
 out_release_irq:
     il->is_open = 0;
     D_MAC80211("leave - failed\n");
     return ret;
 }
 
 static void
 il3945_mac_stop(struct ieee80211_hw *hw)
 {
     struct il_priv *il = hw->priv;
 
     D_MAC80211("enter\n");
 
     if (!il->is_open) {
         D_MAC80211("leave - skip\n");
         return;
     }
 
     il->is_open = 0;
 
     il3945_down(il);
 
     flush_workqueue(il->workqueue);
 
     /* start polling the killswitch state again */
     queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll,
                round_jiffies_relative(2 * HZ));
 
     D_MAC80211("leave\n");
 }
 
 static void
 il3945_mac_tx(struct ieee80211_hw *hw,
            struct ieee80211_tx_control *control,
            struct sk_buff *skb)
 {
     struct il_priv *il = hw->priv;
 
     D_MAC80211("enter\n");
 
     D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
          ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 
     if (il3945_tx_skb(il, control->sta, skb))
         dev_kfree_skb_any(skb);
 
     D_MAC80211("leave\n");
 }
 
 void
 il3945_config_ap(struct il_priv *il)
 {
     struct ieee80211_vif *vif = il->vif;
     int rc = 0;
 
     if (test_bit(S_EXIT_PENDING, &il->status))
         return;
 
     /* The following should be done only at AP bring up */
     if (!(il_is_associated(il))) {
 
         /* RXON - unassoc (to set timing command) */
         il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
         il3945_commit_rxon(il);
 
         /* RXON Timing */
         rc = il_send_rxon_timing(il);
         if (rc)
             IL_WARN("C_RXON_TIMING failed - "
                 "Attempting to continue.\n");
 
         il->staging.assoc_id = 0;
 
         if (vif->bss_conf.use_short_preamble)
             il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
         else
             il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 
         if (il->staging.flags & RXON_FLG_BAND_24G_MSK) {
             if (vif->bss_conf.use_short_slot)
                 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
             else
                 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
         }
         /* restore RXON assoc */
         il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
         il3945_commit_rxon(il);
     }
     il3945_send_beacon_cmd(il);
 }
 
 static int
 il3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
            struct ieee80211_vif *vif, struct ieee80211_sta *sta,
            struct ieee80211_key_conf *key)
 {
     struct il_priv *il = hw->priv;
     int ret = 0;
     u8 sta_id = IL_INVALID_STATION;
     u8 static_key;
 
     D_MAC80211("enter\n");
 
     if (il3945_mod_params.sw_crypto) {
         D_MAC80211("leave - hwcrypto disabled\n");
         return -EOPNOTSUPP;
     }
 
     /*
      * To support IBSS RSN, don't program group keys in IBSS, the
      * hardware will then not attempt to decrypt the frames.
      */
     if (vif->type == NL80211_IFTYPE_ADHOC &&
         !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
         D_MAC80211("leave - IBSS RSN\n");
         return -EOPNOTSUPP;
     }
 
     static_key = !il_is_associated(il);
 
     if (!static_key) {
         sta_id = il_sta_id_or_broadcast(il, sta);
         if (sta_id == IL_INVALID_STATION) {
             D_MAC80211("leave - station not found\n");
             return -EINVAL;
         }
     }
 
     mutex_lock(&il->mutex);
     il_scan_cancel_timeout(il, 100);
 
     switch (cmd) {
     case SET_KEY:
         if (static_key)
             ret = il3945_set_static_key(il, key);
         else
             ret = il3945_set_dynamic_key(il, key, sta_id);
         D_MAC80211("enable hwcrypto key\n");
         break;
     case DISABLE_KEY:
         if (static_key)
             ret = il3945_remove_static_key(il);
         else
             ret = il3945_clear_sta_key_info(il, sta_id);
         D_MAC80211("disable hwcrypto key\n");
         break;
     default:
         ret = -EINVAL;
     }
 
     D_MAC80211("leave ret %d\n", ret);
     mutex_unlock(&il->mutex);
 
     return ret;
 }
 
 static int
 il3945_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
            struct ieee80211_sta *sta)
 {
     struct il_priv *il = hw->priv;
     struct il3945_sta_priv *sta_priv = (void *)sta->drv_priv;
     int ret;
     bool is_ap = vif->type == NL80211_IFTYPE_STATION;
     u8 sta_id;
 
     mutex_lock(&il->mutex);
     D_INFO("station %pM\n", sta->addr);
     sta_priv->common.sta_id = IL_INVALID_STATION;
 
     ret = il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
     if (ret) {
         IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
         /* Should we return success if return code is EEXIST ? */
         mutex_unlock(&il->mutex);
         return ret;
     }
 
     sta_priv->common.sta_id = sta_id;
 
     /* Initialize rate scaling */
     D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
     il3945_rs_rate_init(il, sta, sta_id);
     mutex_unlock(&il->mutex);
 
     return 0;
 }
 
 static void
 il3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
             unsigned int *total_flags, u64 multicast)
 {
     struct il_priv *il = hw->priv;
     __le32 filter_or = 0, filter_nand = 0;
 
 #define CHK(test, flag) do { \
     if (*total_flags & (test))      \
         filter_or |= (flag);        \
     else                    \
         filter_nand |= (flag);      \
     } while (0)
 
     D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
            *total_flags);
 
     CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
     CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
     CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
 
 #undef CHK
 
     mutex_lock(&il->mutex);
 
     il->staging.filter_flags &= ~filter_nand;
     il->staging.filter_flags |= filter_or;
 
     /*
      * Not committing directly because hardware can perform a scan,
      * but even if hw is ready, committing here breaks for some reason,
      * we'll eventually commit the filter flags change anyway.
      */
 
     mutex_unlock(&il->mutex);
 
     /*
      * Receiving all multicast frames is always enabled by the
      * default flags setup in il_connection_init_rx_config()
      * since we currently do not support programming multicast
      * filters into the device.
      */
     *total_flags &=
         FIF_OTHER_BSS | FIF_ALLMULTI |
         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 }
 
 /*****************************************************************************
  *
  * sysfs attributes
  *
  *****************************************************************************/
 
 #ifdef CONFIG_IWLEGACY_DEBUG
 
 /*
  * The following adds a new attribute to the sysfs representation
  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
  * used for controlling the debug level.
  *
  * See the level definitions in iwl for details.
  *
  * The debug_level being managed using sysfs below is a per device debug
  * level that is used instead of the global debug level if it (the per
  * device debug level) is set.
  */
 static ssize_t
 il3945_show_debug_level(struct device *d, struct device_attribute *attr,
             char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
     return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
 }
 
 static ssize_t
 il3945_store_debug_level(struct device *d, struct device_attribute *attr,
              const char *buf, size_t count)
 {
     struct il_priv *il = dev_get_drvdata(d);
     unsigned long val;
     int ret;
 
     ret = kstrtoul(buf, 0, &val);
     if (ret)
         IL_INFO("%s is not in hex or decimal form.\n", buf);
     else
         il->debug_level = val;
 
     return strnlen(buf, count);
 }
 
 static DEVICE_ATTR(debug_level, 0644, il3945_show_debug_level,
            il3945_store_debug_level);
 
 #endif /* CONFIG_IWLEGACY_DEBUG */
 
 static ssize_t
 il3945_show_temperature(struct device *d, struct device_attribute *attr,
             char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
 
     if (!il_is_alive(il))
         return -EAGAIN;
 
     return sprintf(buf, "%d\n", il3945_hw_get_temperature(il));
 }
 
 static DEVICE_ATTR(temperature, 0444, il3945_show_temperature, NULL);
 
 static ssize_t
 il3945_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
     return sprintf(buf, "%d\n", il->tx_power_user_lmt);
 }
 
 static ssize_t
 il3945_store_tx_power(struct device *d, struct device_attribute *attr,
               const char *buf, size_t count)
 {
     struct il_priv *il = dev_get_drvdata(d);
     char *p = (char *)buf;
     u32 val;
 
     val = simple_strtoul(p, &p, 10);
     if (p == buf)
         IL_INFO(": %s is not in decimal form.\n", buf);
     else
         il3945_hw_reg_set_txpower(il, val);
 
     return count;
 }
 
 static DEVICE_ATTR(tx_power, 0644, il3945_show_tx_power, il3945_store_tx_power);
 
 static ssize_t
 il3945_show_flags(struct device *d, struct device_attribute *attr, char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
 
     return sprintf(buf, "0x%04X\n", il->active.flags);
 }
 
 static ssize_t
 il3945_store_flags(struct device *d, struct device_attribute *attr,
            const char *buf, size_t count)
 {
     struct il_priv *il = dev_get_drvdata(d);
     u32 flags = simple_strtoul(buf, NULL, 0);
 
     mutex_lock(&il->mutex);
     if (le32_to_cpu(il->staging.flags) != flags) {
         /* Cancel any currently running scans... */
         if (il_scan_cancel_timeout(il, 100))
             IL_WARN("Could not cancel scan.\n");
         else {
             D_INFO("Committing rxon.flags = 0x%04X\n", flags);
             il->staging.flags = cpu_to_le32(flags);
             il3945_commit_rxon(il);
         }
     }
     mutex_unlock(&il->mutex);
 
     return count;
 }
 
 static DEVICE_ATTR(flags, 0644, il3945_show_flags, il3945_store_flags);
 
 static ssize_t
 il3945_show_filter_flags(struct device *d, struct device_attribute *attr,
              char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
 
     return sprintf(buf, "0x%04X\n", le32_to_cpu(il->active.filter_flags));
 }
 
 static ssize_t
 il3945_store_filter_flags(struct device *d, struct device_attribute *attr,
               const char *buf, size_t count)
 {
     struct il_priv *il = dev_get_drvdata(d);
     u32 filter_flags = simple_strtoul(buf, NULL, 0);
 
     mutex_lock(&il->mutex);
     if (le32_to_cpu(il->staging.filter_flags) != filter_flags) {
         /* Cancel any currently running scans... */
         if (il_scan_cancel_timeout(il, 100))
             IL_WARN("Could not cancel scan.\n");
         else {
             D_INFO("Committing rxon.filter_flags = " "0x%04X\n",
                    filter_flags);
             il->staging.filter_flags = cpu_to_le32(filter_flags);
             il3945_commit_rxon(il);
         }
     }
     mutex_unlock(&il->mutex);
 
     return count;
 }
 
 static DEVICE_ATTR(filter_flags, 0644, il3945_show_filter_flags,
            il3945_store_filter_flags);
 
 static ssize_t
 il3945_show_measurement(struct device *d, struct device_attribute *attr,
             char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
     struct il_spectrum_notification measure_report;
     u32 size = sizeof(measure_report), len = 0, ofs = 0;
     u8 *data = (u8 *) &measure_report;
     unsigned long flags;
 
     spin_lock_irqsave(&il->lock, flags);
     if (!(il->measurement_status & MEASUREMENT_READY)) {
         spin_unlock_irqrestore(&il->lock, flags);
         return 0;
     }
     memcpy(&measure_report, &il->measure_report, size);
     il->measurement_status = 0;
     spin_unlock_irqrestore(&il->lock, flags);
 
     while (size && PAGE_SIZE - len) {
         hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
                    PAGE_SIZE - len, true);
         len = strlen(buf);
         if (PAGE_SIZE - len)
             buf[len++] = '\n';
 
         ofs += 16;
         size -= min(size, 16U);
     }
 
     return len;
 }
 
 static ssize_t
 il3945_store_measurement(struct device *d, struct device_attribute *attr,
              const char *buf, size_t count)
 {
     struct il_priv *il = dev_get_drvdata(d);
     struct ieee80211_measurement_params params = {
         .channel = le16_to_cpu(il->active.channel),
         .start_time = cpu_to_le64(il->_3945.last_tsf),
         .duration = cpu_to_le16(1),
     };
     u8 type = IL_MEASURE_BASIC;
     u8 buffer[32];
     u8 channel;
 
     if (count) {
         char *p = buffer;
         strlcpy(buffer, buf, sizeof(buffer));
         channel = simple_strtoul(p, NULL, 0);
         if (channel)
             params.channel = channel;
 
         p = buffer;
         while (*p && *p != ' ')
             p++;
         if (*p)
             type = simple_strtoul(p + 1, NULL, 0);
     }
 
     D_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n",
            type, params.channel, buf);
     il3945_get_measurement(il, &params, type);
 
     return count;
 }
 
 static DEVICE_ATTR(measurement, 0600, il3945_show_measurement,
            il3945_store_measurement);
 
 static ssize_t
 il3945_store_retry_rate(struct device *d, struct device_attribute *attr,
             const char *buf, size_t count)
 {
     struct il_priv *il = dev_get_drvdata(d);
 
     il->retry_rate = simple_strtoul(buf, NULL, 0);
     if (il->retry_rate <= 0)
         il->retry_rate = 1;
 
     return count;
 }
 
 static ssize_t
 il3945_show_retry_rate(struct device *d, struct device_attribute *attr,
                char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
     return sprintf(buf, "%d", il->retry_rate);
 }
 
 static DEVICE_ATTR(retry_rate, 0600, il3945_show_retry_rate,
            il3945_store_retry_rate);
 
 static ssize_t
 il3945_show_channels(struct device *d, struct device_attribute *attr, char *buf)
 {
     /* all this shit doesn't belong into sysfs anyway */
     return 0;
 }
 
 static DEVICE_ATTR(channels, 0400, il3945_show_channels, NULL);
 
 static ssize_t
 il3945_show_antenna(struct device *d, struct device_attribute *attr, char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
 
     if (!il_is_alive(il))
         return -EAGAIN;
 
     return sprintf(buf, "%d\n", il3945_mod_params.antenna);
 }
 
 static ssize_t
 il3945_store_antenna(struct device *d, struct device_attribute *attr,
              const char *buf, size_t count)
 {
     struct il_priv *il __maybe_unused = dev_get_drvdata(d);
     int ant;
 
     if (count == 0)
         return 0;
 
     if (sscanf(buf, "%1i", &ant) != 1) {
         D_INFO("not in hex or decimal form.\n");
         return count;
     }
 
     if (ant >= 0 && ant <= 2) {
         D_INFO("Setting antenna select to %d.\n", ant);
         il3945_mod_params.antenna = (enum il3945_antenna)ant;
     } else
         D_INFO("Bad antenna select value %d.\n", ant);
 
     return count;
 }
 
 static DEVICE_ATTR(antenna, 0644, il3945_show_antenna, il3945_store_antenna);
 
 static ssize_t
 il3945_show_status(struct device *d, struct device_attribute *attr, char *buf)
 {
     struct il_priv *il = dev_get_drvdata(d);
     if (!il_is_alive(il))
         return -EAGAIN;
     return sprintf(buf, "0x%08x\n", (int)il->status);
 }
 
 static DEVICE_ATTR(status, 0444, il3945_show_status, NULL);
 
 static ssize_t
 il3945_dump_error_log(struct device *d, struct device_attribute *attr,
               const char *buf, size_t count)
 {
     struct il_priv *il = dev_get_drvdata(d);
     char *p = (char *)buf;
 
     if (p[0] == '1')
         il3945_dump_nic_error_log(il);
 
     return strnlen(buf, count);
 }
 
 static DEVICE_ATTR(dump_errors, 0200, NULL, il3945_dump_error_log);
 
 /*****************************************************************************
  *
  * driver setup and tear down
  *
  *****************************************************************************/
 
 static void
 il3945_setup_deferred_work(struct il_priv *il)
 {
     il->workqueue = create_singlethread_workqueue(DRV_NAME);
 
     init_waitqueue_head(&il->wait_command_queue);
 
     INIT_WORK(&il->restart, il3945_bg_restart);
     INIT_WORK(&il->rx_replenish, il3945_bg_rx_replenish);
     INIT_DELAYED_WORK(&il->init_alive_start, il3945_bg_init_alive_start);
     INIT_DELAYED_WORK(&il->alive_start, il3945_bg_alive_start);
     INIT_DELAYED_WORK(&il->_3945.rfkill_poll, il3945_rfkill_poll);
 
     il_setup_scan_deferred_work(il);
 
     il3945_hw_setup_deferred_work(il);
 
     timer_setup(&il->watchdog, il_bg_watchdog, 0);
 
     tasklet_setup(&il->irq_tasklet, il3945_irq_tasklet);
 }
 
 static void
 il3945_cancel_deferred_work(struct il_priv *il)
 {
     il3945_hw_cancel_deferred_work(il);
 
     cancel_delayed_work_sync(&il->init_alive_start);
     cancel_delayed_work(&il->alive_start);
 
     il_cancel_scan_deferred_work(il);
 }
 
 static struct attribute *il3945_sysfs_entries[] = {
     &dev_attr_antenna.attr,
     &dev_attr_channels.attr,
     &dev_attr_dump_errors.attr,
     &dev_attr_flags.attr,
     &dev_attr_filter_flags.attr,
     &dev_attr_measurement.attr,
     &dev_attr_retry_rate.attr,
     &dev_attr_status.attr,
     &dev_attr_temperature.attr,
     &dev_attr_tx_power.attr,
 #ifdef CONFIG_IWLEGACY_DEBUG
     &dev_attr_debug_level.attr,
 #endif
     NULL
 };
 
 static const struct attribute_group il3945_attribute_group = {
     .name = NULL,       /* put in device directory */
     .attrs = il3945_sysfs_entries,
 };
 
 static struct ieee80211_ops il3945_mac_ops __ro_after_init = {
     .tx = il3945_mac_tx,
     .start = il3945_mac_start,
     .stop = il3945_mac_stop,
     .add_interface = il_mac_add_interface,
     .remove_interface = il_mac_remove_interface,
     .change_interface = il_mac_change_interface,
     .config = il_mac_config,
     .configure_filter = il3945_configure_filter,
     .set_key = il3945_mac_set_key,
     .conf_tx = il_mac_conf_tx,
     .reset_tsf = il_mac_reset_tsf,
     .bss_info_changed = il_mac_bss_info_changed,
     .hw_scan = il_mac_hw_scan,
     .sta_add = il3945_mac_sta_add,
     .sta_remove = il_mac_sta_remove,
     .tx_last_beacon = il_mac_tx_last_beacon,
     .flush = il_mac_flush,
 };
 
 static int
 il3945_init_drv(struct il_priv *il)
 {
     int ret;
     struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
 
     il->retry_rate = 1;
     il->beacon_skb = NULL;
 
     spin_lock_init(&il->sta_lock);
     spin_lock_init(&il->hcmd_lock);
 
     INIT_LIST_HEAD(&il->free_frames);
 
     mutex_init(&il->mutex);
 
     il->ieee_channels = NULL;
     il->ieee_rates = NULL;
     il->band = NL80211_BAND_2GHZ;
 
     il->iw_mode = NL80211_IFTYPE_STATION;
     il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
 
     /* initialize force reset */
     il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
 
     if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
         IL_WARN("Unsupported EEPROM version: 0x%04X\n",
             eeprom->version);
         ret = -EINVAL;
         goto err;
     }
     ret = il_init_channel_map(il);
     if (ret) {
         IL_ERR("initializing regulatory failed: %d\n", ret);
         goto err;
     }
 
     /* Set up txpower settings in driver for all channels */
     if (il3945_txpower_set_from_eeprom(il)) {
         ret = -EIO;
         goto err_free_channel_map;
     }
 
     ret = il_init_geos(il);
     if (ret) {
         IL_ERR("initializing geos failed: %d\n", ret);
         goto err_free_channel_map;
     }
     il3945_init_hw_rates(il, il->ieee_rates);
 
     return 0;
 
 err_free_channel_map:
     il_free_channel_map(il);
 err:
     return ret;
 }
 
 #define IL3945_MAX_PROBE_REQUEST    200
 
 static int
 il3945_setup_mac(struct il_priv *il)
 {
     int ret;
     struct ieee80211_hw *hw = il->hw;
 
     hw->rate_control_algorithm = "iwl-3945-rs";
     hw->sta_data_size = sizeof(struct il3945_sta_priv);
     hw->vif_data_size = sizeof(struct il_vif_priv);
 
     /* Tell mac80211 our characteristics */
     ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
     ieee80211_hw_set(hw, SUPPORTS_PS);
     ieee80211_hw_set(hw, SIGNAL_DBM);
     ieee80211_hw_set(hw, SPECTRUM_MGMT);
 
     hw->wiphy->interface_modes =
         BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
 
     hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
     hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
                        REGULATORY_DISABLE_BEACON_HINTS;
 
     hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 
     hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
     /* we create the 802.11 header and a zero-length SSID element */
     hw->wiphy->max_scan_ie_len = IL3945_MAX_PROBE_REQUEST - 24 - 2;
 
     /* Default value; 4 EDCA QOS priorities */
     hw->queues = 4;
 
     if (il->bands[NL80211_BAND_2GHZ].n_channels)
         il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
             &il->bands[NL80211_BAND_2GHZ];
 
     if (il->bands[NL80211_BAND_5GHZ].n_channels)
         il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
             &il->bands[NL80211_BAND_5GHZ];
 
     il_leds_init(il);
 
     wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 
     ret = ieee80211_register_hw(il->hw);
     if (ret) {
         IL_ERR("Failed to register hw (error %d)\n", ret);
         return ret;
     }
     il->mac80211_registered = 1;
 
     return 0;
 }
 
 static int
 il3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
     int err = 0;
     struct il_priv *il;
     struct ieee80211_hw *hw;
     struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
     struct il3945_eeprom *eeprom;
     unsigned long flags;
 
     /***********************
      * 1. Allocating HW data
      * ********************/
 
     hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il3945_mac_ops);
     if (!hw) {
         err = -ENOMEM;
         goto out;
     }
     il = hw->priv;
     il->hw = hw;
     SET_IEEE80211_DEV(hw, &pdev->dev);
 
     il->cmd_queue = IL39_CMD_QUEUE_NUM;
 
     D_INFO("*** LOAD DRIVER ***\n");
     il->cfg = cfg;
     il->ops = &il3945_ops;
 #ifdef CONFIG_IWLEGACY_DEBUGFS
     il->debugfs_ops = &il3945_debugfs_ops;
 #endif
     il->pci_dev = pdev;
     il->inta_mask = CSR_INI_SET_MASK;
 
     /***************************
      * 2. Initializing PCI bus
      * *************************/
     pci_disable_link_state(pdev,
                    PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
                    PCIE_LINK_STATE_CLKPM);
 
     if (pci_enable_device(pdev)) {
         err = -ENODEV;
         goto out_ieee80211_free_hw;
     }
 
     pci_set_master(pdev);
 
     err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
     if (err) {
         IL_WARN("No suitable DMA available.\n");
         goto out_pci_disable_device;
     }
 
     pci_set_drvdata(pdev, il);
     err = pci_request_regions(pdev, DRV_NAME);
     if (err)
         goto out_pci_disable_device;
 
     /***********************
      * 3. Read REV Register
      * ********************/
     il->hw_base = pci_ioremap_bar(pdev, 0);
     if (!il->hw_base) {
         err = -ENODEV;
         goto out_pci_release_regions;
     }
 
     D_INFO("pci_resource_len = 0x%08llx\n",
            (unsigned long long)pci_resource_len(pdev, 0));
     D_INFO("pci_resource_base = %p\n", il->hw_base);
 
     /* We disable the RETRY_TIMEOUT register (0x41) to keep
      * PCI Tx retries from interfering with C3 CPU state */
     pci_write_config_byte(pdev, 0x41, 0x00);
 
     /* these spin locks will be used in apm_init and EEPROM access
      * we should init now
      */
     spin_lock_init(&il->reg_lock);
     spin_lock_init(&il->lock);
 
     /*
      * stop and reset the on-board processor just in case it is in a
      * strange state ... like being left stranded by a primary kernel
      * and this is now the kdump kernel trying to start up
      */
     _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
 
     /***********************
      * 4. Read EEPROM
      * ********************/
 
     /* Read the EEPROM */
     err = il_eeprom_init(il);
     if (err) {
         IL_ERR("Unable to init EEPROM\n");
         goto out_iounmap;
     }
     /* MAC Address location in EEPROM same for 3945/4965 */
     eeprom = (struct il3945_eeprom *)il->eeprom;
     D_INFO("MAC address: %pM\n", eeprom->mac_address);
     SET_IEEE80211_PERM_ADDR(il->hw, eeprom->mac_address);
 
     /***********************
      * 5. Setup HW Constants
      * ********************/
     /* Device-specific setup */
     err = il3945_hw_set_hw_params(il);
     if (err) {
         IL_ERR("failed to set hw settings\n");
         goto out_eeprom_free;
     }
 
     /***********************
      * 6. Setup il
      * ********************/
 
     err = il3945_init_drv(il);
     if (err) {
         IL_ERR("initializing driver failed\n");
         goto out_unset_hw_params;
     }
 
     IL_INFO("Detected Intel Wireless WiFi Link %s\n", il->cfg->name);
 
     /***********************
      * 7. Setup Services
      * ********************/
 
     spin_lock_irqsave(&il->lock, flags);
     il_disable_interrupts(il);
     spin_unlock_irqrestore(&il->lock, flags);
 
     pci_enable_msi(il->pci_dev);
 
     err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
     if (err) {
         IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
         goto out_disable_msi;
     }
 
     err = sysfs_create_group(&pdev->dev.kobj, &il3945_attribute_group);
     if (err) {
         IL_ERR("failed to create sysfs device attributes\n");
         goto out_release_irq;
     }
 
     il_set_rxon_channel(il, &il->bands[NL80211_BAND_2GHZ].channels[5]);
     il3945_setup_deferred_work(il);
     il3945_setup_handlers(il);
     il_power_initialize(il);
 
     /*********************************
      * 8. Setup and Register mac80211
      * *******************************/
 
     il_enable_interrupts(il);
 
     err = il3945_setup_mac(il);
     if (err)
         goto out_remove_sysfs;
 
     il_dbgfs_register(il, DRV_NAME);
 
     /* Start monitoring the killswitch */
     queue_delayed_work(il->workqueue, &il->_3945.rfkill_poll, 2 * HZ);
 
     return 0;
 
 out_remove_sysfs:
     destroy_workqueue(il->workqueue);
     il->workqueue = NULL;
     sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
 out_release_irq:
     free_irq(il->pci_dev->irq, il);
 out_disable_msi:
     pci_disable_msi(il->pci_dev);
     il_free_geos(il);
     il_free_channel_map(il);
 out_unset_hw_params:
     il3945_unset_hw_params(il);
 out_eeprom_free:
     il_eeprom_free(il);
 out_iounmap:
     iounmap(il->hw_base);
 out_pci_release_regions:
     pci_release_regions(pdev);
 out_pci_disable_device:
     pci_disable_device(pdev);
 out_ieee80211_free_hw:
     ieee80211_free_hw(il->hw);
 out:
     return err;
 }
 
 static void
 il3945_pci_remove(struct pci_dev *pdev)
 {
     struct il_priv *il = pci_get_drvdata(pdev);
     unsigned long flags;
 
     if (!il)
         return;
 
     D_INFO("*** UNLOAD DRIVER ***\n");
 
     il_dbgfs_unregister(il);
 
     set_bit(S_EXIT_PENDING, &il->status);
 
     il_leds_exit(il);
 
     if (il->mac80211_registered) {
         ieee80211_unregister_hw(il->hw);
         il->mac80211_registered = 0;
     } else {
         il3945_down(il);
     }
 
     /*
      * Make sure device is reset to low power before unloading driver.
      * This may be redundant with il_down(), but there are paths to
      * run il_down() without calling apm_ops.stop(), and there are
      * paths to avoid running il_down() at all before leaving driver.
      * This (inexpensive) call *makes sure* device is reset.
      */
     il_apm_stop(il);
 
     /* make sure we flush any pending irq or
      * tasklet for the driver
      */
     spin_lock_irqsave(&il->lock, flags);
     il_disable_interrupts(il);
     spin_unlock_irqrestore(&il->lock, flags);
 
     il3945_synchronize_irq(il);
 
     sysfs_remove_group(&pdev->dev.kobj, &il3945_attribute_group);
 
     cancel_delayed_work_sync(&il->_3945.rfkill_poll);
 
     il3945_dealloc_ucode_pci(il);
 
     if (il->rxq.bd)
         il3945_rx_queue_free(il, &il->rxq);
     il3945_hw_txq_ctx_free(il);
 
     il3945_unset_hw_params(il);
 
     /*netif_stop_queue(dev); */
 
     /* ieee80211_unregister_hw calls il3945_mac_stop, which flushes
      * il->workqueue... so we can't take down the workqueue
      * until now... */
     destroy_workqueue(il->workqueue);
     il->workqueue = NULL;
 
     free_irq(pdev->irq, il);
     pci_disable_msi(pdev);
 
     iounmap(il->hw_base);
     pci_release_regions(pdev);
     pci_disable_device(pdev);
 
     il_free_channel_map(il);
     il_free_geos(il);
     kfree(il->scan_cmd);
     dev_kfree_skb(il->beacon_skb);
     ieee80211_free_hw(il->hw);
 }
 
 /*****************************************************************************
  *
  * driver and module entry point
  *
  *****************************************************************************/
 
 static struct pci_driver il3945_driver = {
     .name = DRV_NAME,
     .id_table = il3945_hw_card_ids,
     .probe = il3945_pci_probe,
     .remove = il3945_pci_remove,
     .driver.pm = IL_LEGACY_PM_OPS,
 };
 
 static int __init
 il3945_init(void)
 {
 
     int ret;
     pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
     pr_info(DRV_COPYRIGHT "\n");
 
     /*
      * Disabling hardware scan means that mac80211 will perform scans
      * "the hard way", rather than using device's scan.
      */
     if (il3945_mod_params.disable_hw_scan) {
         pr_info("hw_scan is disabled\n");
         il3945_mac_ops.hw_scan = NULL;
     }
 
     ret = il3945_rate_control_register();
     if (ret) {
         pr_err("Unable to register rate control algorithm: %d\n", ret);
         return ret;
     }
 
     ret = pci_register_driver(&il3945_driver);
     if (ret) {
         pr_err("Unable to initialize PCI module\n");
         goto error_register;
     }
 
     return ret;
 
 error_register:
     il3945_rate_control_unregister();
     return ret;
 }
 
 static void __exit
 il3945_exit(void)
 {
     pci_unregister_driver(&il3945_driver);
     il3945_rate_control_unregister();
 }
 
 MODULE_FIRMWARE(IL3945_MODULE_FIRMWARE(IL3945_UCODE_API_MAX));
 
 module_param_named(antenna, il3945_mod_params.antenna, int, 0444);
 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
 module_param_named(swcrypto, il3945_mod_params.sw_crypto, int, 0444);
 MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])");
 module_param_named(disable_hw_scan, il3945_mod_params.disable_hw_scan, int,
            0444);
 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
 #ifdef CONFIG_IWLEGACY_DEBUG
 module_param_named(debug, il_debug_level, uint, 0644);
 MODULE_PARM_DESC(debug, "debug output mask");
 #endif
 module_param_named(fw_restart, il3945_mod_params.restart_fw, int, 0444);
 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
 
 module_exit(il3945_exit);
 module_init(il3945_init);