lib.c

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/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <[email protected]>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <net/mac80211.h>

#include "iwl-io.h"
#include "iwl-agn-hw.h"
#include "iwl-trans.h"
#include "iwl-modparams.h"

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

int iwlagn_hw_valid_rtc_data_addr(u32 addr)
{
    return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
        (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
}

int iwlagn_send_tx_power(struct iwl_priv *priv)
{
    struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
    u8 tx_ant_cfg_cmd;

    if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
              "TX Power requested while scanning!\n"))
        return -EAGAIN;

    /* half dBm need to multiply */
    tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);

    if (tx_power_cmd.global_lmt > priv->eeprom_data->max_tx_pwr_half_dbm) {
        /*
         * For the newer devices which using enhanced/extend tx power
         * table in EEPROM, the format is in half dBm. driver need to
         * convert to dBm format before report to mac80211.
         * By doing so, there is a possibility of 1/2 dBm resolution
         * lost. driver will perform "round-up" operation before
         * reporting, but it will cause 1/2 dBm tx power over the
         * regulatory limit. Perform the checking here, if the
         * "tx_power_user_lmt" is higher than EEPROM value (in
         * half-dBm format), lower the tx power based on EEPROM
         */
        tx_power_cmd.global_lmt =
            priv->eeprom_data->max_tx_pwr_half_dbm;
    }
    tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
    tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;

    if (IWL_UCODE_API(priv->fw->ucode_ver) == 1)
        tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
    else
        tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;

    return iwl_dvm_send_cmd_pdu(priv, tx_ant_cfg_cmd, CMD_SYNC,
            sizeof(tx_power_cmd), &tx_power_cmd);
}

void iwlagn_temperature(struct iwl_priv *priv)
{
    lockdep_assert_held(&priv->statistics.lock);

    /* store temperature from correct statistics (in Celsius) */
    priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
    iwl_tt_handler(priv);
}

int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
{
    int idx = 0;
    int band_offset = 0;

    /* HT rate format: mac80211 wants an MCS number, which is just LSB */
    if (rate_n_flags & RATE_MCS_HT_MSK) {
        idx = (rate_n_flags & 0xff);
        return idx;
    /* Legacy rate format, search for match in table */
    } else {
        if (band == IEEE80211_BAND_5GHZ)
            band_offset = IWL_FIRST_OFDM_RATE;
        for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
            if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
                return idx - band_offset;
    }

    return -1;
}

int iwlagn_manage_ibss_station(struct iwl_priv *priv,
                   struct ieee80211_vif *vif, bool add)
{
    struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;

    if (add)
        return iwlagn_add_bssid_station(priv, vif_priv->ctx,
                        vif->bss_conf.bssid,
                        &vif_priv->ibss_bssid_sta_id);
    return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
                  vif->bss_conf.bssid);
}

int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
{
    struct iwl_txfifo_flush_cmd flush_cmd;
    struct iwl_host_cmd cmd = {
        .id = REPLY_TXFIFO_FLUSH,
        .len = { sizeof(struct iwl_txfifo_flush_cmd), },
        .flags = CMD_SYNC,
        .data = { &flush_cmd, },
    };

    might_sleep();

    memset(&flush_cmd, 0, sizeof(flush_cmd));
    if (flush_control & BIT(IWL_RXON_CTX_BSS))
        flush_cmd.fifo_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
                 IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
                 IWL_SCD_MGMT_MSK;
    if ((flush_control & BIT(IWL_RXON_CTX_PAN)) &&
        (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
        flush_cmd.fifo_control |= IWL_PAN_SCD_VO_MSK |
                IWL_PAN_SCD_VI_MSK | IWL_PAN_SCD_BE_MSK |
                IWL_PAN_SCD_BK_MSK | IWL_PAN_SCD_MGMT_MSK |
                IWL_PAN_SCD_MULTICAST_MSK;

    if (priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE)
        flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;

    IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
               flush_cmd.fifo_control);
    flush_cmd.flush_control = cpu_to_le16(flush_control);

    return iwl_dvm_send_cmd(priv, &cmd);
}

void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
{
    mutex_lock(&priv->mutex);
    ieee80211_stop_queues(priv->hw);
    if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
        IWL_ERR(priv, "flush request fail\n");
        goto done;
    }
    IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
    iwl_trans_wait_tx_queue_empty(priv->trans);
done:
    ieee80211_wake_queues(priv->hw);
    mutex_unlock(&priv->mutex);
}

/*
 * BT coex
 */
/* Notmal TDM */
static const __le32 iwlagn_def_3w_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaeaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xcc00ff28),
    cpu_to_le32(0x0000aaaa),
    cpu_to_le32(0xcc00aaaa),
    cpu_to_le32(0x0000aaaa),
    cpu_to_le32(0xc0004000),
    cpu_to_le32(0x00004000),
    cpu_to_le32(0xf0005000),
    cpu_to_le32(0xf0005000),
};


/* Loose Coex */
static const __le32 iwlagn_loose_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaeaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xcc00ff28),
    cpu_to_le32(0x0000aaaa),
    cpu_to_le32(0xcc00aaaa),
    cpu_to_le32(0x0000aaaa),
    cpu_to_le32(0x00000000),
    cpu_to_le32(0x00000000),
    cpu_to_le32(0xf0005000),
    cpu_to_le32(0xf0005000),
};

/* Full concurrency */
static const __le32 iwlagn_concurrent_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0xaaaaaaaa),
    cpu_to_le32(0x00000000),
    cpu_to_le32(0x00000000),
    cpu_to_le32(0x00000000),
    cpu_to_le32(0x00000000),
};

void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
{
    struct iwl_basic_bt_cmd basic = {
        .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
        .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
        .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
        .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
    };
    struct iwl_bt_cmd_v1 bt_cmd_v1;
    struct iwl_bt_cmd_v2 bt_cmd_v2;
    int ret;

    BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
            sizeof(basic.bt3_lookup_table));

    if (priv->cfg->bt_params) {
        /*
         * newer generation of devices (2000 series and newer)
         * use the version 2 of the bt command
         * we need to make sure sending the host command
         * with correct data structure to avoid uCode assert
         */
        if (priv->cfg->bt_params->bt_session_2) {
            bt_cmd_v2.prio_boost = cpu_to_le32(
                priv->cfg->bt_params->bt_prio_boost);
            bt_cmd_v2.tx_prio_boost = 0;
            bt_cmd_v2.rx_prio_boost = 0;
        } else {
            /* older version only has 8 bits */
            WARN_ON(priv->cfg->bt_params->bt_prio_boost & ~0xFF);
            bt_cmd_v1.prio_boost =
                priv->cfg->bt_params->bt_prio_boost;
            bt_cmd_v1.tx_prio_boost = 0;
            bt_cmd_v1.rx_prio_boost = 0;
        }
    } else {
        IWL_ERR(priv, "failed to construct BT Coex Config\n");
        return;
    }

    /*
     * Possible situations when BT needs to take over for receive,
     * at the same time where STA needs to response to AP's frame(s),
     * reduce the tx power of the required response frames, by that,
     * allow the concurrent BT receive & WiFi transmit
     * (BT - ANT A, WiFi -ANT B), without interference to one another
     *
     * Reduced tx power apply to control frames only (ACK/Back/CTS)
     * when indicated by the BT config command
     */
    basic.kill_ack_mask = priv->kill_ack_mask;
    basic.kill_cts_mask = priv->kill_cts_mask;
    if (priv->reduced_txpower)
        basic.reduce_txpower = IWLAGN_BT_REDUCED_TX_PWR;
    basic.valid = priv->bt_valid;

    /*
     * Configure BT coex mode to "no coexistence" when the
     * user disabled BT coexistence, we have no interface
     * (might be in monitor mode), or the interface is in
     * IBSS mode (no proper uCode support for coex then).
     */
    if (!iwlwifi_mod_params.bt_coex_active ||
        priv->iw_mode == NL80211_IFTYPE_ADHOC) {
        basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
    } else {
        basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
                    IWLAGN_BT_FLAG_COEX_MODE_SHIFT;

        if (!priv->bt_enable_pspoll)
            basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
        else
            basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;

        if (priv->bt_ch_announce)
            basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
        IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
    }
    priv->bt_enable_flag = basic.flags;
    if (priv->bt_full_concurrent)
        memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
            sizeof(iwlagn_concurrent_lookup));
    else
        memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
            sizeof(iwlagn_def_3w_lookup));

    IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
               basic.flags ? "active" : "disabled",
               priv->bt_full_concurrent ?
               "full concurrency" : "3-wire");

    if (priv->cfg->bt_params->bt_session_2) {
        memcpy(&bt_cmd_v2.basic, &basic,
            sizeof(basic));
        ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
            CMD_SYNC, sizeof(bt_cmd_v2), &bt_cmd_v2);
    } else {
        memcpy(&bt_cmd_v1.basic, &basic,
            sizeof(basic));
        ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
            CMD_SYNC, sizeof(bt_cmd_v1), &bt_cmd_v1);
    }
    if (ret)
        IWL_ERR(priv, "failed to send BT Coex Config\n");

}

void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
{
    struct iwl_rxon_context *ctx, *found_ctx = NULL;
    bool found_ap = false;

    lockdep_assert_held(&priv->mutex);

    /* Check whether AP or GO mode is active. */
    if (rssi_ena) {
        for_each_context(priv, ctx) {
            if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
                iwl_is_associated_ctx(ctx)) {
                found_ap = true;
                break;
            }
        }
    }

    /*
     * If disable was received or If GO/AP mode, disable RSSI
     * measurements.
     */
    if (!rssi_ena || found_ap) {
        if (priv->cur_rssi_ctx) {
            ctx = priv->cur_rssi_ctx;
            ieee80211_disable_rssi_reports(ctx->vif);
            priv->cur_rssi_ctx = NULL;
        }
        return;
    }

    /*
     * If rssi measurements need to be enabled, consider all cases now.
     * Figure out how many contexts are active.
     */
    for_each_context(priv, ctx) {
        if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
            iwl_is_associated_ctx(ctx)) {
            found_ctx = ctx;
            break;
        }
    }

    /*
     * rssi monitor already enabled for the correct interface...nothing
     * to do.
     */
    if (found_ctx == priv->cur_rssi_ctx)
        return;

    /*
     * Figure out if rssi monitor is currently enabled, and needs
     * to be changed. If rssi monitor is already enabled, disable
     * it first else just enable rssi measurements on the
     * interface found above.
     */
    if (priv->cur_rssi_ctx) {
        ctx = priv->cur_rssi_ctx;
        if (ctx->vif)
            ieee80211_disable_rssi_reports(ctx->vif);
    }

    priv->cur_rssi_ctx = found_ctx;

    if (!found_ctx)
        return;

    ieee80211_enable_rssi_reports(found_ctx->vif,
            IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
            IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
}

static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
{
    return BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3 >>
            BT_UART_MSG_FRAME3SCOESCO_POS;
}

static void iwlagn_bt_traffic_change_work(struct work_struct *work)
{
    struct iwl_priv *priv =
        container_of(work, struct iwl_priv, bt_traffic_change_work);
    struct iwl_rxon_context *ctx;
    int smps_request = -1;

    if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
        /* bt coex disabled */
        return;
    }

    /*
     * Note: bt_traffic_load can be overridden by scan complete and
     * coex profile notifications. Ignore that since only bad consequence
     * can be not matching debug print with actual state.
     */
    IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
               priv->bt_traffic_load);

    switch (priv->bt_traffic_load) {
    case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
        if (priv->bt_status)
            smps_request = IEEE80211_SMPS_DYNAMIC;
        else
            smps_request = IEEE80211_SMPS_AUTOMATIC;
        break;
    case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
        smps_request = IEEE80211_SMPS_DYNAMIC;
        break;
    case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
    case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
        smps_request = IEEE80211_SMPS_STATIC;
        break;
    default:
        IWL_ERR(priv, "Invalid BT traffic load: %d\n",
            priv->bt_traffic_load);
        break;
    }

    mutex_lock(&priv->mutex);

    /*
     * We can not send command to firmware while scanning. When the scan
     * complete we will schedule this work again. We do check with mutex
     * locked to prevent new scan request to arrive. We do not check
     * STATUS_SCANNING to avoid race when queue_work two times from
     * different notifications, but quit and not perform any work at all.
     */
    if (test_bit(STATUS_SCAN_HW, &priv->status))
        goto out;

    iwl_update_chain_flags(priv);

    if (smps_request != -1) {
        priv->current_ht_config.smps = smps_request;
        for_each_context(priv, ctx) {
            if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
                ieee80211_request_smps(ctx->vif, smps_request);
        }
    }

    /*
     * Dynamic PS poll related functionality. Adjust RSSI measurements if
     * necessary.
     */
    iwlagn_bt_coex_rssi_monitor(priv);
out:
    mutex_unlock(&priv->mutex);
}

/*
 * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
 * correct interface or disable it if this is the last interface to be
 * removed.
 */
void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
{
    if (priv->bt_is_sco &&
        priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
        iwlagn_bt_adjust_rssi_monitor(priv, true);
    else
        iwlagn_bt_adjust_rssi_monitor(priv, false);
}

static void iwlagn_print_uartmsg(struct iwl_priv *priv,
                struct iwl_bt_uart_msg *uart_msg)
{
    IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
            "Update Req = 0x%X\n",
        (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
            BT_UART_MSG_FRAME1MSGTYPE_POS,
        (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
            BT_UART_MSG_FRAME1SSN_POS,
        (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
            BT_UART_MSG_FRAME1UPDATEREQ_POS);

    IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
            "Chl_SeqN = 0x%X, In band = 0x%X\n",
        (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
            BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
        (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
            BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
        (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
            BT_UART_MSG_FRAME2CHLSEQN_POS,
        (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
            BT_UART_MSG_FRAME2INBAND_POS);

    IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
            "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X\n",
        (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
            BT_UART_MSG_FRAME3SCOESCO_POS,
        (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
            BT_UART_MSG_FRAME3SNIFF_POS,
        (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
            BT_UART_MSG_FRAME3A2DP_POS,
        (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
            BT_UART_MSG_FRAME3ACL_POS,
        (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
            BT_UART_MSG_FRAME3MASTER_POS,
        (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
            BT_UART_MSG_FRAME3OBEX_POS);

    IWL_DEBUG_COEX(priv, "Idle duration = 0x%X\n",
        (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
            BT_UART_MSG_FRAME4IDLEDURATION_POS);

    IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
            "eSCO Retransmissions = 0x%X\n",
        (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
            BT_UART_MSG_FRAME5TXACTIVITY_POS,
        (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
            BT_UART_MSG_FRAME5RXACTIVITY_POS,
        (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
            BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);

    IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X\n",
        (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
            BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
        (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
            BT_UART_MSG_FRAME6DISCOVERABLE_POS);

    IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
            "0x%X, Inquiry = 0x%X, Connectable = 0x%X\n",
        (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
            BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
        (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
            BT_UART_MSG_FRAME7PAGE_POS,
        (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
            BT_UART_MSG_FRAME7INQUIRY_POS,
        (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
            BT_UART_MSG_FRAME7CONNECTABLE_POS);
}

static bool iwlagn_set_kill_msk(struct iwl_priv *priv,
                struct iwl_bt_uart_msg *uart_msg)
{
    bool need_update = false;
    u8 kill_msk = IWL_BT_KILL_REDUCE;
    static const __le32 bt_kill_ack_msg[3] = {
        IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
        IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
        IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};
    static const __le32 bt_kill_cts_msg[3] = {
        IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
        IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
        IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};

    if (!priv->reduced_txpower)
        kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
            ? IWL_BT_KILL_OVERRIDE : IWL_BT_KILL_DEFAULT;
    if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
        priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
        priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
        priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
        priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
        priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
        need_update = true;
    }
    return need_update;
}

/*
 * Upon RSSI changes, sends a bt config command with following changes
 *  1. enable/disable "reduced control frames tx power
 *  2. update the "kill)ack_mask" and "kill_cts_mask"
 *
 * If "reduced tx power" is enabled, uCode shall
 *  1. ACK/Back/CTS rate shall reduced to 6Mbps
 *  2. not use duplciate 20/40MHz mode
 */
static bool iwlagn_fill_txpower_mode(struct iwl_priv *priv,
                struct iwl_bt_uart_msg *uart_msg)
{
    bool need_update = false;
    struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
    int ave_rssi;

    if (!ctx->vif || (ctx->vif->type != NL80211_IFTYPE_STATION)) {
        IWL_DEBUG_INFO(priv, "BSS ctx not active or not in sta mode\n");
        return false;
    }

    ave_rssi = ieee80211_ave_rssi(ctx->vif);
    if (!ave_rssi) {
        /* no rssi data, no changes to reduce tx power */
        IWL_DEBUG_COEX(priv, "no rssi data available\n");
        return need_update;
    }
    if (!priv->reduced_txpower &&
        !iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
        (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) &&
        (uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
        BT_UART_MSG_FRAME3OBEX_MSK)) &&
        !(uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
        BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK))) {
        /* enabling reduced tx power */
        priv->reduced_txpower = true;
        priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
        need_update = true;
    } else if (priv->reduced_txpower &&
           (iwl_is_associated(priv, IWL_RXON_CTX_PAN) ||
           (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) ||
           (uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
           BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK)) ||
           !(uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
           BT_UART_MSG_FRAME3OBEX_MSK)))) {
        /* disable reduced tx power */
        priv->reduced_txpower = false;
        priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
        need_update = true;
    }

    return need_update;
}

int iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
                  struct iwl_rx_cmd_buffer *rxb,
                  struct iwl_device_cmd *cmd)
{
    struct iwl_rx_packet *pkt = rxb_addr(rxb);
    struct iwl_bt_coex_profile_notif *coex = (void *)pkt->data;
    struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;

    if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
        /* bt coex disabled */
        return 0;
    }

    IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
    IWL_DEBUG_COEX(priv, "    status: %d\n", coex->bt_status);
    IWL_DEBUG_COEX(priv, "    traffic load: %d\n", coex->bt_traffic_load);
    IWL_DEBUG_COEX(priv, "    CI compliance: %d\n",
            coex->bt_ci_compliance);
    iwlagn_print_uartmsg(priv, uart_msg);

    priv->last_bt_traffic_load = priv->bt_traffic_load;
    priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);

    if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
        if (priv->bt_status != coex->bt_status ||
            priv->last_bt_traffic_load != coex->bt_traffic_load) {
            if (coex->bt_status) {
                /* BT on */
                if (!priv->bt_ch_announce)
                    priv->bt_traffic_load =
                        IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
                else
                    priv->bt_traffic_load =
                        coex->bt_traffic_load;
            } else {
                /* BT off */
                priv->bt_traffic_load =
                    IWL_BT_COEX_TRAFFIC_LOAD_NONE;
            }
            priv->bt_status = coex->bt_status;
            queue_work(priv->workqueue,
                   &priv->bt_traffic_change_work);
        }
    }

    /* schedule to send runtime bt_config */
    /* check reduce power before change ack/cts kill mask */
    if (iwlagn_fill_txpower_mode(priv, uart_msg) ||
        iwlagn_set_kill_msk(priv, uart_msg))
        queue_work(priv->workqueue, &priv->bt_runtime_config);


    /* FIXME: based on notification, adjust the prio_boost */

    priv->bt_ci_compliance = coex->bt_ci_compliance;
    return 0;
}

void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
{
    priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
        iwlagn_bt_coex_profile_notif;
}

void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
{
    INIT_WORK(&priv->bt_traffic_change_work,
          iwlagn_bt_traffic_change_work);
}

void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
{
    cancel_work_sync(&priv->bt_traffic_change_work);
}

static bool is_single_rx_stream(struct iwl_priv *priv)
{
    return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
           priv->current_ht_config.single_chain_sufficient;
}

#define IWL_NUM_RX_CHAINS_MULTIPLE  3
#define IWL_NUM_RX_CHAINS_SINGLE    2
#define IWL_NUM_IDLE_CHAINS_DUAL    2
#define IWL_NUM_IDLE_CHAINS_SINGLE  1

/*
 * Determine how many receiver/antenna chains to use.
 *
 * More provides better reception via diversity.  Fewer saves power
 * at the expense of throughput, but only when not in powersave to
 * start with.
 *
 * MIMO (dual stream) requires at least 2, but works better with 3.
 * This does not determine *which* chains to use, just how many.
 */
static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
{
    if (priv->cfg->bt_params &&
        priv->cfg->bt_params->advanced_bt_coexist &&
        (priv->bt_full_concurrent ||
         priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
        /*
         * only use chain 'A' in bt high traffic load or
         * full concurrency mode
         */
        return IWL_NUM_RX_CHAINS_SINGLE;
    }
    /* # of Rx chains to use when expecting MIMO. */
    if (is_single_rx_stream(priv))
        return IWL_NUM_RX_CHAINS_SINGLE;
    else
        return IWL_NUM_RX_CHAINS_MULTIPLE;
}

/*
 * When we are in power saving mode, unless device support spatial
 * multiplexing power save, use the active count for rx chain count.
 */
static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
{
    /* # Rx chains when idling, depending on SMPS mode */
    switch (priv->current_ht_config.smps) {
    case IEEE80211_SMPS_STATIC:
    case IEEE80211_SMPS_DYNAMIC:
        return IWL_NUM_IDLE_CHAINS_SINGLE;
    case IEEE80211_SMPS_AUTOMATIC:
    case IEEE80211_SMPS_OFF:
        return active_cnt;
    default:
        WARN(1, "invalid SMPS mode %d",
             priv->current_ht_config.smps);
        return active_cnt;
    }
}

/* up to 4 chains */
static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
{
    u8 res;
    res = (chain_bitmap & BIT(0)) >> 0;
    res += (chain_bitmap & BIT(1)) >> 1;
    res += (chain_bitmap & BIT(2)) >> 2;
    res += (chain_bitmap & BIT(3)) >> 3;
    return res;
}

void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
    bool is_single = is_single_rx_stream(priv);
    bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
    u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
    u32 active_chains;
    u16 rx_chain;

    /* Tell uCode which antennas are actually connected.
     * Before first association, we assume all antennas are connected.
     * Just after first association, iwl_chain_noise_calibration()
     *    checks which antennas actually *are* connected. */
    if (priv->chain_noise_data.active_chains)
        active_chains = priv->chain_noise_data.active_chains;
    else
        active_chains = priv->eeprom_data->valid_rx_ant;

    if (priv->cfg->bt_params &&
        priv->cfg->bt_params->advanced_bt_coexist &&
        (priv->bt_full_concurrent ||
         priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
        /*
         * only use chain 'A' in bt high traffic load or
         * full concurrency mode
         */
        active_chains = first_antenna(active_chains);
    }

    rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;

    /* How many receivers should we use? */
    active_rx_cnt = iwl_get_active_rx_chain_count(priv);
    idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);


    /* correct rx chain count according hw settings
     * and chain noise calibration
     */
    valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
    if (valid_rx_cnt < active_rx_cnt)
        active_rx_cnt = valid_rx_cnt;

    if (valid_rx_cnt < idle_rx_cnt)
        idle_rx_cnt = valid_rx_cnt;

    rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
    rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;

    ctx->staging.rx_chain = cpu_to_le16(rx_chain);

    if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
        ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
    else
        ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;

    IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
            ctx->staging.rx_chain,
            active_rx_cnt, idle_rx_cnt);

    WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
        active_rx_cnt < idle_rx_cnt);
}

u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
{
    int i;
    u8 ind = ant;

    if (priv->band == IEEE80211_BAND_2GHZ &&
        priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
        return 0;

    for (i = 0; i < RATE_ANT_NUM - 1; i++) {
        ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
        if (valid & BIT(ind))
            return ind;
    }
    return ant;
}

#ifdef CONFIG_PM_SLEEP
static void iwlagn_convert_p1k(u16 *p1k, __le16 *out)
{
    int i;

    for (i = 0; i < IWLAGN_P1K_SIZE; i++)
        out[i] = cpu_to_le16(p1k[i]);
}

struct wowlan_key_data {
    struct iwl_rxon_context *ctx;
    struct iwlagn_wowlan_rsc_tsc_params_cmd *rsc_tsc;
    struct iwlagn_wowlan_tkip_params_cmd *tkip;
    const u8 *bssid;
    bool error, use_rsc_tsc, use_tkip;
};


static void iwlagn_wowlan_program_keys(struct ieee80211_hw *hw,
                   struct ieee80211_vif *vif,
                   struct ieee80211_sta *sta,
                   struct ieee80211_key_conf *key,
                   void *_data)
{
    struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
    struct wowlan_key_data *data = _data;
    struct iwl_rxon_context *ctx = data->ctx;
    struct aes_sc *aes_sc, *aes_tx_sc = NULL;
    struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
    struct iwlagn_p1k_cache *rx_p1ks;
    u8 *rx_mic_key;
    struct ieee80211_key_seq seq;
    u32 cur_rx_iv32 = 0;
    u16 p1k[IWLAGN_P1K_SIZE];
    int ret, i;

    mutex_lock(&priv->mutex);

    if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
         key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
         !sta && !ctx->key_mapping_keys)
        ret = iwl_set_default_wep_key(priv, ctx, key);
    else
        ret = iwl_set_dynamic_key(priv, ctx, key, sta);

    if (ret) {
        IWL_ERR(priv, "Error setting key during suspend!\n");
        data->error = true;
    }

    switch (key->cipher) {
    case WLAN_CIPHER_SUITE_TKIP:
        if (sta) {
            tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
            tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;

            rx_p1ks = data->tkip->rx_uni;

            ieee80211_get_key_tx_seq(key, &seq);
            tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
            tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);

            ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
            iwlagn_convert_p1k(p1k, data->tkip->tx.p1k);

            memcpy(data->tkip->mic_keys.tx,
                   &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
                   IWLAGN_MIC_KEY_SIZE);

            rx_mic_key = data->tkip->mic_keys.rx_unicast;
        } else {
            tkip_sc =
                data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
            rx_p1ks = data->tkip->rx_multi;
            rx_mic_key = data->tkip->mic_keys.rx_mcast;
        }

        /*
         * For non-QoS this relies on the fact that both the uCode and
         * mac80211 use TID 0 (as they need to to avoid replay attacks)
         * for checking the IV in the frames.
         */
        for (i = 0; i < IWLAGN_NUM_RSC; i++) {
            ieee80211_get_key_rx_seq(key, i, &seq);
            tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
            tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
            /* wrapping isn't allowed, AP must rekey */
            if (seq.tkip.iv32 > cur_rx_iv32)
                cur_rx_iv32 = seq.tkip.iv32;
        }

        ieee80211_get_tkip_rx_p1k(key, data->bssid, cur_rx_iv32, p1k);
        iwlagn_convert_p1k(p1k, rx_p1ks[0].p1k);
        ieee80211_get_tkip_rx_p1k(key, data->bssid,
                      cur_rx_iv32 + 1, p1k);
        iwlagn_convert_p1k(p1k, rx_p1ks[1].p1k);

        memcpy(rx_mic_key,
               &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
               IWLAGN_MIC_KEY_SIZE);

        data->use_tkip = true;
        data->use_rsc_tsc = true;
        break;
    case WLAN_CIPHER_SUITE_CCMP:
        if (sta) {
            u8 *pn = seq.ccmp.pn;

            aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
            aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;

            ieee80211_get_key_tx_seq(key, &seq);
            aes_tx_sc->pn = cpu_to_le64(
                    (u64)pn[5] |
                    ((u64)pn[4] << 8) |
                    ((u64)pn[3] << 16) |
                    ((u64)pn[2] << 24) |
                    ((u64)pn[1] << 32) |
                    ((u64)pn[0] << 40));
        } else
            aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;

        /*
         * For non-QoS this relies on the fact that both the uCode and
         * mac80211 use TID 0 for checking the IV in the frames.
         */
        for (i = 0; i < IWLAGN_NUM_RSC; i++) {
            u8 *pn = seq.ccmp.pn;

            ieee80211_get_key_rx_seq(key, i, &seq);
            aes_sc->pn = cpu_to_le64(
                    (u64)pn[5] |
                    ((u64)pn[4] << 8) |
                    ((u64)pn[3] << 16) |
                    ((u64)pn[2] << 24) |
                    ((u64)pn[1] << 32) |
                    ((u64)pn[0] << 40));
        }
        data->use_rsc_tsc = true;
        break;
    }

    mutex_unlock(&priv->mutex);
}

int iwlagn_send_patterns(struct iwl_priv *priv,
            struct cfg80211_wowlan *wowlan)
{
    struct iwlagn_wowlan_patterns_cmd *pattern_cmd;
    struct iwl_host_cmd cmd = {
        .id = REPLY_WOWLAN_PATTERNS,
        .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
        .flags = CMD_SYNC,
    };
    int i, err;

    if (!wowlan->n_patterns)
        return 0;

    cmd.len[0] = sizeof(*pattern_cmd) +
        wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern);

    pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
    if (!pattern_cmd)
        return -ENOMEM;

    pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);

    for (i = 0; i < wowlan->n_patterns; i++) {
        int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);

        memcpy(&pattern_cmd->patterns[i].mask,
            wowlan->patterns[i].mask, mask_len);
        memcpy(&pattern_cmd->patterns[i].pattern,
            wowlan->patterns[i].pattern,
            wowlan->patterns[i].pattern_len);
        pattern_cmd->patterns[i].mask_size = mask_len;
        pattern_cmd->patterns[i].pattern_size =
            wowlan->patterns[i].pattern_len;
    }

    cmd.data[0] = pattern_cmd;
    err = iwl_dvm_send_cmd(priv, &cmd);
    kfree(pattern_cmd);
    return err;
}

int iwlagn_suspend(struct iwl_priv *priv, struct cfg80211_wowlan *wowlan)
{
    struct iwlagn_wowlan_wakeup_filter_cmd wakeup_filter_cmd;
    struct iwl_rxon_cmd rxon;
    struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
    struct iwlagn_wowlan_kek_kck_material_cmd kek_kck_cmd;
    struct iwlagn_wowlan_tkip_params_cmd tkip_cmd = {};
    struct iwlagn_d3_config_cmd d3_cfg_cmd = {};
    struct wowlan_key_data key_data = {
        .ctx = ctx,
        .bssid = ctx->active.bssid_addr,
        .use_rsc_tsc = false,
        .tkip = &tkip_cmd,
        .use_tkip = false,
    };
    int ret, i;
    u16 seq;

    key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
    if (!key_data.rsc_tsc)
        return -ENOMEM;

    memset(&wakeup_filter_cmd, 0, sizeof(wakeup_filter_cmd));

    /*
     * We know the last used seqno, and the uCode expects to know that
     * one, it will increment before TX.
     */
    seq = le16_to_cpu(priv->last_seq_ctl) & IEEE80211_SCTL_SEQ;
    wakeup_filter_cmd.non_qos_seq = cpu_to_le16(seq);

    /*
     * For QoS counters, we store the one to use next, so subtract 0x10
     * since the uCode will add 0x10 before using the value.
     */
    for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
        seq = priv->tid_data[IWL_AP_ID][i].seq_number;
        seq -= 0x10;
        wakeup_filter_cmd.qos_seq[i] = cpu_to_le16(seq);
    }

    if (wowlan->disconnect)
        wakeup_filter_cmd.enabled |=
            cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
                    IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE);
    if (wowlan->magic_pkt)
        wakeup_filter_cmd.enabled |=
            cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET);
    if (wowlan->gtk_rekey_failure)
        wakeup_filter_cmd.enabled |=
            cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
    if (wowlan->eap_identity_req)
        wakeup_filter_cmd.enabled |=
            cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ);
    if (wowlan->four_way_handshake)
        wakeup_filter_cmd.enabled |=
            cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
    if (wowlan->n_patterns)
        wakeup_filter_cmd.enabled |=
            cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH);

    if (wowlan->rfkill_release)
        d3_cfg_cmd.wakeup_flags |=
            cpu_to_le32(IWLAGN_D3_WAKEUP_RFKILL);

    iwl_scan_cancel_timeout(priv, 200);

    memcpy(&rxon, &ctx->active, sizeof(rxon));

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

    priv->wowlan = true;

    ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_WOWLAN);
    if (ret)
        goto out;

    /* now configure WoWLAN ucode */
    ret = iwl_alive_start(priv);
    if (ret)
        goto out;

    memcpy(&ctx->staging, &rxon, sizeof(rxon));
    ret = iwlagn_commit_rxon(priv, ctx);
    if (ret)
        goto out;

    ret = iwl_power_update_mode(priv, true);
    if (ret)
        goto out;

    if (!iwlwifi_mod_params.sw_crypto) {
        /* mark all keys clear */
        priv->ucode_key_table = 0;
        ctx->key_mapping_keys = 0;

        /*
         * This needs to be unlocked due to lock ordering
         * constraints. Since we're in the suspend path
         * that isn't really a problem though.
         */
        mutex_unlock(&priv->mutex);
        ieee80211_iter_keys(priv->hw, ctx->vif,
                    iwlagn_wowlan_program_keys,
                    &key_data);
        mutex_lock(&priv->mutex);
        if (key_data.error) {
            ret = -EIO;
            goto out;
        }

        if (key_data.use_rsc_tsc) {
            struct iwl_host_cmd rsc_tsc_cmd = {
                .id = REPLY_WOWLAN_TSC_RSC_PARAMS,
                .flags = CMD_SYNC,
                .data[0] = key_data.rsc_tsc,
                .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
                .len[0] = sizeof(*key_data.rsc_tsc),
            };

            ret = iwl_dvm_send_cmd(priv, &rsc_tsc_cmd);
            if (ret)
                goto out;
        }

        if (key_data.use_tkip) {
            ret = iwl_dvm_send_cmd_pdu(priv,
                         REPLY_WOWLAN_TKIP_PARAMS,
                         CMD_SYNC, sizeof(tkip_cmd),
                         &tkip_cmd);
            if (ret)
                goto out;
        }

        if (priv->have_rekey_data) {
            memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
            memcpy(kek_kck_cmd.kck, priv->kck, NL80211_KCK_LEN);
            kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
            memcpy(kek_kck_cmd.kek, priv->kek, NL80211_KEK_LEN);
            kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
            kek_kck_cmd.replay_ctr = priv->replay_ctr;

            ret = iwl_dvm_send_cmd_pdu(priv,
                         REPLY_WOWLAN_KEK_KCK_MATERIAL,
                         CMD_SYNC, sizeof(kek_kck_cmd),
                         &kek_kck_cmd);
            if (ret)
                goto out;
        }
    }

    ret = iwl_dvm_send_cmd_pdu(priv, REPLY_D3_CONFIG, CMD_SYNC,
                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
    if (ret)
        goto out;

    ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_WAKEUP_FILTER,
                 CMD_SYNC, sizeof(wakeup_filter_cmd),
                 &wakeup_filter_cmd);
    if (ret)
        goto out;

    ret = iwlagn_send_patterns(priv, wowlan);
 out:
    kfree(key_data.rsc_tsc);
    return ret;
}
#endif

int iwl_dvm_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
    if (iwl_is_rfkill(priv) || iwl_is_ctkill(priv)) {
        IWL_WARN(priv, "Not sending command - %s KILL\n",
             iwl_is_rfkill(priv) ? "RF" : "CT");
        return -EIO;
    }

    if (test_bit(STATUS_FW_ERROR, &priv->status)) {
        IWL_ERR(priv, "Command %s failed: FW Error\n",
            iwl_dvm_get_cmd_string(cmd->id));
        return -EIO;
    }

    /*
     * Synchronous commands from this op-mode must hold
     * the mutex, this ensures we don't try to send two
     * (or more) synchronous commands at a time.
     */
    if (!(cmd->flags & CMD_ASYNC))
        lockdep_assert_held(&priv->mutex);

    if (priv->ucode_owner == IWL_OWNERSHIP_TM &&
        !(cmd->flags & CMD_ON_DEMAND)) {
        IWL_DEBUG_HC(priv, "tm own the uCode, no regular hcmd send\n");
        return -EIO;
    }

    return iwl_trans_send_cmd(priv->trans, cmd);
}

int iwl_dvm_send_cmd_pdu(struct iwl_priv *priv, u8 id,
             u32 flags, u16 len, const void *data)
{
    struct iwl_host_cmd cmd = {
        .id = id,
        .len = { len, },
        .data = { data, },
        .flags = flags,
    };

    return iwl_dvm_send_cmd(priv, &cmd);
}