cmd.c

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/*
 * This file is part of wl1271
 *
 * Copyright (C) 2009-2010 Nokia Corporation
 *
 * Contact: Luciano Coelho <[email protected]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 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 St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/etherdevice.h>
#include <linux/ieee80211.h>
#include <linux/slab.h>

#include "wlcore.h"
#include "debug.h"
#include "io.h"
#include "acx.h"
#include "wl12xx_80211.h"
#include "cmd.h"
#include "event.h"
#include "tx.h"
#include "hw_ops.h"

#define WL1271_CMD_FAST_POLL_COUNT       50
#define WL1271_WAIT_EVENT_FAST_POLL_COUNT 20

/*
 * send command to firmware
 *
 * @wl: wl struct
 * @id: command id
 * @buf: buffer containing the command, must work with dma
 * @len: length of the buffer
 */
int wl1271_cmd_send(struct wl1271 *wl, u16 id, void *buf, size_t len,
            size_t res_len)
{
    struct wl1271_cmd_header *cmd;
    unsigned long timeout;
    u32 intr;
    int ret = 0;
    u16 status;
    u16 poll_count = 0;

    if (WARN_ON(unlikely(wl->state == WLCORE_STATE_RESTARTING)))
        return -EIO;

    cmd = buf;
    cmd->id = cpu_to_le16(id);
    cmd->status = 0;

    WARN_ON(len % 4 != 0);
    WARN_ON(test_bit(WL1271_FLAG_IN_ELP, &wl->flags));

    ret = wlcore_write(wl, wl->cmd_box_addr, buf, len, false);
    if (ret < 0)
        goto fail;

    /*
     * TODO: we just need this because one bit is in a different
     * place.  Is there any better way?
     */
    ret = wl->ops->trigger_cmd(wl, wl->cmd_box_addr, buf, len);
    if (ret < 0)
        goto fail;

    timeout = jiffies + msecs_to_jiffies(WL1271_COMMAND_TIMEOUT);

    ret = wlcore_read_reg(wl, REG_INTERRUPT_NO_CLEAR, &intr);
    if (ret < 0)
        goto fail;

    while (!(intr & WL1271_ACX_INTR_CMD_COMPLETE)) {
        if (time_after(jiffies, timeout)) {
            wl1271_error("command complete timeout");
            ret = -ETIMEDOUT;
            goto fail;
        }

        poll_count++;
        if (poll_count < WL1271_CMD_FAST_POLL_COUNT)
            udelay(10);
        else
            msleep(1);

        ret = wlcore_read_reg(wl, REG_INTERRUPT_NO_CLEAR, &intr);
        if (ret < 0)
            goto fail;
    }

    /* read back the status code of the command */
    if (res_len == 0)
        res_len = sizeof(struct wl1271_cmd_header);

    ret = wlcore_read(wl, wl->cmd_box_addr, cmd, res_len, false);
    if (ret < 0)
        goto fail;

    status = le16_to_cpu(cmd->status);
    if (status != CMD_STATUS_SUCCESS) {
        wl1271_error("command execute failure %d", status);
        ret = -EIO;
        goto fail;
    }

    ret = wlcore_write_reg(wl, REG_INTERRUPT_ACK,
                   WL1271_ACX_INTR_CMD_COMPLETE);
    if (ret < 0)
        goto fail;

    return 0;

fail:
    wl12xx_queue_recovery_work(wl);
    return ret;
}

/*
 * Poll the mailbox event field until any of the bits in the mask is set or a
 * timeout occurs (WL1271_EVENT_TIMEOUT in msecs)
 */
static int wl1271_cmd_wait_for_event_or_timeout(struct wl1271 *wl,
                        u32 mask, bool *timeout)
{
    u32 *events_vector;
    u32 event;
    unsigned long timeout_time;
    u16 poll_count = 0;
    int ret = 0;

    *timeout = false;

    events_vector = kmalloc(sizeof(*events_vector), GFP_KERNEL | GFP_DMA);
    if (!events_vector)
        return -ENOMEM;

    timeout_time = jiffies + msecs_to_jiffies(WL1271_EVENT_TIMEOUT);

    do {
        if (time_after(jiffies, timeout_time)) {
            wl1271_debug(DEBUG_CMD, "timeout waiting for event %d",
                     (int)mask);
            *timeout = true;
            goto out;
        }

        poll_count++;
        if (poll_count < WL1271_WAIT_EVENT_FAST_POLL_COUNT)
            usleep_range(50, 51);
        else
            usleep_range(1000, 5000);

        /* read from both event fields */
        ret = wlcore_read(wl, wl->mbox_ptr[0], events_vector,
                  sizeof(*events_vector), false);
        if (ret < 0)
            goto out;

        event = *events_vector & mask;

        ret = wlcore_read(wl, wl->mbox_ptr[1], events_vector,
                  sizeof(*events_vector), false);
        if (ret < 0)
            goto out;

        event |= *events_vector & mask;
    } while (!event);

out:
    kfree(events_vector);
    return ret;
}

static int wl1271_cmd_wait_for_event(struct wl1271 *wl, u32 mask)
{
    int ret;
    bool timeout = false;

    ret = wl1271_cmd_wait_for_event_or_timeout(wl, mask, &timeout);
    if (ret != 0 || timeout) {
        wl12xx_queue_recovery_work(wl);
        return ret;
    }

    return 0;
}

int wl12xx_cmd_role_enable(struct wl1271 *wl, u8 *addr, u8 role_type,
               u8 *role_id)
{
    struct wl12xx_cmd_role_enable *cmd;
    int ret;

    wl1271_debug(DEBUG_CMD, "cmd role enable");

    if (WARN_ON(*role_id != WL12XX_INVALID_ROLE_ID))
        return -EBUSY;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    /* get role id */
    cmd->role_id = find_first_zero_bit(wl->roles_map, WL12XX_MAX_ROLES);
    if (cmd->role_id >= WL12XX_MAX_ROLES) {
        ret = -EBUSY;
        goto out_free;
    }

    memcpy(cmd->mac_address, addr, ETH_ALEN);
    cmd->role_type = role_type;

    ret = wl1271_cmd_send(wl, CMD_ROLE_ENABLE, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role enable");
        goto out_free;
    }

    __set_bit(cmd->role_id, wl->roles_map);
    *role_id = cmd->role_id;

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_role_disable(struct wl1271 *wl, u8 *role_id)
{
    struct wl12xx_cmd_role_disable *cmd;
    int ret;

    wl1271_debug(DEBUG_CMD, "cmd role disable");

    if (WARN_ON(*role_id == WL12XX_INVALID_ROLE_ID))
        return -ENOENT;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }
    cmd->role_id = *role_id;

    ret = wl1271_cmd_send(wl, CMD_ROLE_DISABLE, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role disable");
        goto out_free;
    }

    __clear_bit(*role_id, wl->roles_map);
    *role_id = WL12XX_INVALID_ROLE_ID;

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_allocate_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid)
{
    unsigned long flags;
    u8 link = find_first_zero_bit(wl->links_map, WL12XX_MAX_LINKS);
    if (link >= WL12XX_MAX_LINKS)
        return -EBUSY;

    /* these bits are used by op_tx */
    spin_lock_irqsave(&wl->wl_lock, flags);
    __set_bit(link, wl->links_map);
    __set_bit(link, wlvif->links_map);
    spin_unlock_irqrestore(&wl->wl_lock, flags);
    *hlid = link;
    return 0;
}

void wl12xx_free_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid)
{
    unsigned long flags;

    if (*hlid == WL12XX_INVALID_LINK_ID)
        return;

    /* these bits are used by op_tx */
    spin_lock_irqsave(&wl->wl_lock, flags);
    __clear_bit(*hlid, wl->links_map);
    __clear_bit(*hlid, wlvif->links_map);
    spin_unlock_irqrestore(&wl->wl_lock, flags);

    /*
     * At this point op_tx() will not add more packets to the queues. We
     * can purge them.
     */
    wl1271_tx_reset_link_queues(wl, *hlid);

    *hlid = WL12XX_INVALID_LINK_ID;
}

static int wl12xx_get_new_session_id(struct wl1271 *wl,
                     struct wl12xx_vif *wlvif)
{
    if (wlvif->session_counter >= SESSION_COUNTER_MAX)
        wlvif->session_counter = 0;

    wlvif->session_counter++;

    return wlvif->session_counter;
}

static u8 wlcore_get_native_channel_type(u8 nl_channel_type)
{
    switch (nl_channel_type) {
    case NL80211_CHAN_NO_HT:
        return WLCORE_CHAN_NO_HT;
    case NL80211_CHAN_HT20:
        return WLCORE_CHAN_HT20;
    case NL80211_CHAN_HT40MINUS:
        return WLCORE_CHAN_HT40MINUS;
    case NL80211_CHAN_HT40PLUS:
        return WLCORE_CHAN_HT40PLUS;
    default:
        WARN_ON(1);
        return WLCORE_CHAN_NO_HT;
    }
}

static int wl12xx_cmd_role_start_dev(struct wl1271 *wl,
                     struct wl12xx_vif *wlvif)
{
    struct wl12xx_cmd_role_start *cmd;
    int ret;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    wl1271_debug(DEBUG_CMD, "cmd role start dev %d", wlvif->dev_role_id);

    cmd->role_id = wlvif->dev_role_id;
    if (wlvif->band == IEEE80211_BAND_5GHZ)
        cmd->band = WLCORE_BAND_5GHZ;
    cmd->channel = wlvif->channel;

    if (wlvif->dev_hlid == WL12XX_INVALID_LINK_ID) {
        ret = wl12xx_allocate_link(wl, wlvif, &wlvif->dev_hlid);
        if (ret)
            goto out_free;
    }
    cmd->device.hlid = wlvif->dev_hlid;
    cmd->device.session = wl12xx_get_new_session_id(wl, wlvif);

    wl1271_debug(DEBUG_CMD, "role start: roleid=%d, hlid=%d, session=%d",
             cmd->role_id, cmd->device.hlid, cmd->device.session);

    ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role enable");
        goto err_hlid;
    }

    goto out_free;

err_hlid:
    /* clear links on error */
    wl12xx_free_link(wl, wlvif, &wlvif->dev_hlid);

out_free:
    kfree(cmd);

out:
    return ret;
}

static int wl12xx_cmd_role_stop_dev(struct wl1271 *wl,
                    struct wl12xx_vif *wlvif)
{
    struct wl12xx_cmd_role_stop *cmd;
    int ret;

    if (WARN_ON(wlvif->dev_hlid == WL12XX_INVALID_LINK_ID))
        return -EINVAL;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    wl1271_debug(DEBUG_CMD, "cmd role stop dev");

    cmd->role_id = wlvif->dev_role_id;
    cmd->disc_type = DISCONNECT_IMMEDIATE;
    cmd->reason = cpu_to_le16(WLAN_REASON_UNSPECIFIED);

    ret = wl1271_cmd_send(wl, CMD_ROLE_STOP, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role stop");
        goto out_free;
    }

    ret = wl1271_cmd_wait_for_event(wl, ROLE_STOP_COMPLETE_EVENT_ID);
    if (ret < 0) {
        wl1271_error("cmd role stop dev event completion error");
        goto out_free;
    }

    wl12xx_free_link(wl, wlvif, &wlvif->dev_hlid);

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_role_start_sta(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
    struct wl12xx_cmd_role_start *cmd;
    int ret;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    wl1271_debug(DEBUG_CMD, "cmd role start sta %d", wlvif->role_id);

    cmd->role_id = wlvif->role_id;
    if (wlvif->band == IEEE80211_BAND_5GHZ)
        cmd->band = WLCORE_BAND_5GHZ;
    cmd->channel = wlvif->channel;
    cmd->sta.basic_rate_set = cpu_to_le32(wlvif->basic_rate_set);
    cmd->sta.beacon_interval = cpu_to_le16(wlvif->beacon_int);
    cmd->sta.ssid_type = WL12XX_SSID_TYPE_ANY;
    cmd->sta.ssid_len = wlvif->ssid_len;
    memcpy(cmd->sta.ssid, wlvif->ssid, wlvif->ssid_len);
    memcpy(cmd->sta.bssid, vif->bss_conf.bssid, ETH_ALEN);
    cmd->sta.local_rates = cpu_to_le32(wlvif->rate_set);
    cmd->channel_type = wlcore_get_native_channel_type(wlvif->channel_type);

    if (wlvif->sta.hlid == WL12XX_INVALID_LINK_ID) {
        ret = wl12xx_allocate_link(wl, wlvif, &wlvif->sta.hlid);
        if (ret)
            goto out_free;
    }
    cmd->sta.hlid = wlvif->sta.hlid;
    cmd->sta.session = wl12xx_get_new_session_id(wl, wlvif);
    cmd->sta.remote_rates = cpu_to_le32(wlvif->rate_set);

    wl1271_debug(DEBUG_CMD, "role start: roleid=%d, hlid=%d, session=%d "
             "basic_rate_set: 0x%x, remote_rates: 0x%x",
             wlvif->role_id, cmd->sta.hlid, cmd->sta.session,
             wlvif->basic_rate_set, wlvif->rate_set);

    ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role start sta");
        goto err_hlid;
    }

    goto out_free;

err_hlid:
    /* clear links on error. */
    wl12xx_free_link(wl, wlvif, &wlvif->sta.hlid);

out_free:
    kfree(cmd);

out:
    return ret;
}

/* use this function to stop ibss as well */
int wl12xx_cmd_role_stop_sta(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    struct wl12xx_cmd_role_stop *cmd;
    int ret;
    bool timeout = false;

    if (WARN_ON(wlvif->sta.hlid == WL12XX_INVALID_LINK_ID))
        return -EINVAL;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    wl1271_debug(DEBUG_CMD, "cmd role stop sta %d", wlvif->role_id);

    cmd->role_id = wlvif->role_id;
    cmd->disc_type = DISCONNECT_IMMEDIATE;
    cmd->reason = cpu_to_le16(WLAN_REASON_UNSPECIFIED);

    ret = wl1271_cmd_send(wl, CMD_ROLE_STOP, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role stop sta");
        goto out_free;
    }

    /*
     * Sometimes the firmware doesn't send this event, so we just
     * time out without failing.  Queue recovery for other
     * failures.
     */
    ret = wl1271_cmd_wait_for_event_or_timeout(wl,
                           ROLE_STOP_COMPLETE_EVENT_ID,
                           &timeout);
    if (ret)
        wl12xx_queue_recovery_work(wl);

    wl12xx_free_link(wl, wlvif, &wlvif->sta.hlid);

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_role_start_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    struct wl12xx_cmd_role_start *cmd;
    struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
    struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
    u32 supported_rates;
    int ret;

    wl1271_debug(DEBUG_CMD, "cmd role start ap %d", wlvif->role_id);

    /* trying to use hidden SSID with an old hostapd version */
    if (wlvif->ssid_len == 0 && !bss_conf->hidden_ssid) {
        wl1271_error("got a null SSID from beacon/bss");
        ret = -EINVAL;
        goto out;
    }

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    ret = wl12xx_allocate_link(wl, wlvif, &wlvif->ap.global_hlid);
    if (ret < 0)
        goto out_free;

    ret = wl12xx_allocate_link(wl, wlvif, &wlvif->ap.bcast_hlid);
    if (ret < 0)
        goto out_free_global;

    cmd->role_id = wlvif->role_id;
    cmd->ap.aging_period = cpu_to_le16(wl->conf.tx.ap_aging_period);
    cmd->ap.bss_index = WL1271_AP_BSS_INDEX;
    cmd->ap.global_hlid = wlvif->ap.global_hlid;
    cmd->ap.broadcast_hlid = wlvif->ap.bcast_hlid;
    cmd->ap.basic_rate_set = cpu_to_le32(wlvif->basic_rate_set);
    cmd->ap.beacon_interval = cpu_to_le16(wlvif->beacon_int);
    cmd->ap.dtim_interval = bss_conf->dtim_period;
    cmd->ap.beacon_expiry = WL1271_AP_DEF_BEACON_EXP;
    /* FIXME: Change when adding DFS */
    cmd->ap.reset_tsf = 1;  /* By default reset AP TSF */
    cmd->channel = wlvif->channel;
    cmd->channel_type = wlcore_get_native_channel_type(wlvif->channel_type);

    if (!bss_conf->hidden_ssid) {
        /* take the SSID from the beacon for backward compatibility */
        cmd->ap.ssid_type = WL12XX_SSID_TYPE_PUBLIC;
        cmd->ap.ssid_len = wlvif->ssid_len;
        memcpy(cmd->ap.ssid, wlvif->ssid, wlvif->ssid_len);
    } else {
        cmd->ap.ssid_type = WL12XX_SSID_TYPE_HIDDEN;
        cmd->ap.ssid_len = bss_conf->ssid_len;
        memcpy(cmd->ap.ssid, bss_conf->ssid, bss_conf->ssid_len);
    }

    supported_rates = CONF_TX_AP_ENABLED_RATES | CONF_TX_MCS_RATES |
        wlcore_hw_ap_get_mimo_wide_rate_mask(wl, wlvif);

    wl1271_debug(DEBUG_CMD, "cmd role start ap with supported_rates 0x%08x",
             supported_rates);

    cmd->ap.local_rates = cpu_to_le32(supported_rates);

    switch (wlvif->band) {
    case IEEE80211_BAND_2GHZ:
        cmd->band = WLCORE_BAND_2_4GHZ;
        break;
    case IEEE80211_BAND_5GHZ:
        cmd->band = WLCORE_BAND_5GHZ;
        break;
    default:
        wl1271_warning("ap start - unknown band: %d", (int)wlvif->band);
        cmd->band = WLCORE_BAND_2_4GHZ;
        break;
    }

    ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role start ap");
        goto out_free_bcast;
    }

    goto out_free;

out_free_bcast:
    wl12xx_free_link(wl, wlvif, &wlvif->ap.bcast_hlid);

out_free_global:
    wl12xx_free_link(wl, wlvif, &wlvif->ap.global_hlid);

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_role_stop_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    struct wl12xx_cmd_role_stop *cmd;
    int ret;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    wl1271_debug(DEBUG_CMD, "cmd role stop ap %d", wlvif->role_id);

    cmd->role_id = wlvif->role_id;

    ret = wl1271_cmd_send(wl, CMD_ROLE_STOP, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role stop ap");
        goto out_free;
    }

    wl12xx_free_link(wl, wlvif, &wlvif->ap.bcast_hlid);
    wl12xx_free_link(wl, wlvif, &wlvif->ap.global_hlid);

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_role_start_ibss(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
    struct wl12xx_cmd_role_start *cmd;
    struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
    int ret;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    wl1271_debug(DEBUG_CMD, "cmd role start ibss %d", wlvif->role_id);

    cmd->role_id = wlvif->role_id;
    if (wlvif->band == IEEE80211_BAND_5GHZ)
        cmd->band = WLCORE_BAND_5GHZ;
    cmd->channel = wlvif->channel;
    cmd->ibss.basic_rate_set = cpu_to_le32(wlvif->basic_rate_set);
    cmd->ibss.beacon_interval = cpu_to_le16(wlvif->beacon_int);
    cmd->ibss.dtim_interval = bss_conf->dtim_period;
    cmd->ibss.ssid_type = WL12XX_SSID_TYPE_ANY;
    cmd->ibss.ssid_len = wlvif->ssid_len;
    memcpy(cmd->ibss.ssid, wlvif->ssid, wlvif->ssid_len);
    memcpy(cmd->ibss.bssid, vif->bss_conf.bssid, ETH_ALEN);
    cmd->sta.local_rates = cpu_to_le32(wlvif->rate_set);

    if (wlvif->sta.hlid == WL12XX_INVALID_LINK_ID) {
        ret = wl12xx_allocate_link(wl, wlvif, &wlvif->sta.hlid);
        if (ret)
            goto out_free;
    }
    cmd->ibss.hlid = wlvif->sta.hlid;
    cmd->ibss.remote_rates = cpu_to_le32(wlvif->rate_set);

    wl1271_debug(DEBUG_CMD, "role start: roleid=%d, hlid=%d, session=%d "
             "basic_rate_set: 0x%x, remote_rates: 0x%x",
             wlvif->role_id, cmd->sta.hlid, cmd->sta.session,
             wlvif->basic_rate_set, wlvif->rate_set);

    wl1271_debug(DEBUG_CMD, "vif->bss_conf.bssid = %pM",
             vif->bss_conf.bssid);

    ret = wl1271_cmd_send(wl, CMD_ROLE_START, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd role enable");
        goto err_hlid;
    }

    goto out_free;

err_hlid:
    /* clear links on error. */
    wl12xx_free_link(wl, wlvif, &wlvif->sta.hlid);

out_free:
    kfree(cmd);

out:
    return ret;
}


int wl1271_cmd_test(struct wl1271 *wl, void *buf, size_t buf_len, u8 answer)
{
    int ret;
    size_t res_len = 0;

    wl1271_debug(DEBUG_CMD, "cmd test");

    if (answer)
        res_len = buf_len;

    ret = wl1271_cmd_send(wl, CMD_TEST, buf, buf_len, res_len);

    if (ret < 0) {
        wl1271_warning("TEST command failed");
        return ret;
    }

    return ret;
}
EXPORT_SYMBOL_GPL(wl1271_cmd_test);

int wl1271_cmd_interrogate(struct wl1271 *wl, u16 id, void *buf, size_t len)
{
    struct acx_header *acx = buf;
    int ret;

    wl1271_debug(DEBUG_CMD, "cmd interrogate");

    acx->id = cpu_to_le16(id);

    /* payload length, does not include any headers */
    acx->len = cpu_to_le16(len - sizeof(*acx));

    ret = wl1271_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx), len);
    if (ret < 0)
        wl1271_error("INTERROGATE command failed");

    return ret;
}

int wl1271_cmd_configure(struct wl1271 *wl, u16 id, void *buf, size_t len)
{
    struct acx_header *acx = buf;
    int ret;

    wl1271_debug(DEBUG_CMD, "cmd configure (%d)", id);

    acx->id = cpu_to_le16(id);

    /* payload length, does not include any headers */
    acx->len = cpu_to_le16(len - sizeof(*acx));

    ret = wl1271_cmd_send(wl, CMD_CONFIGURE, acx, len, 0);
    if (ret < 0) {
        wl1271_warning("CONFIGURE command NOK");
        return ret;
    }

    return 0;
}
EXPORT_SYMBOL_GPL(wl1271_cmd_configure);

int wl1271_cmd_data_path(struct wl1271 *wl, bool enable)
{
    struct cmd_enabledisable_path *cmd;
    int ret;
    u16 cmd_rx, cmd_tx;

    wl1271_debug(DEBUG_CMD, "cmd data path");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    /* the channel here is only used for calibration, so hardcoded to 1 */
    cmd->channel = 1;

    if (enable) {
        cmd_rx = CMD_ENABLE_RX;
        cmd_tx = CMD_ENABLE_TX;
    } else {
        cmd_rx = CMD_DISABLE_RX;
        cmd_tx = CMD_DISABLE_TX;
    }

    ret = wl1271_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("rx %s cmd for channel %d failed",
                 enable ? "start" : "stop", cmd->channel);
        goto out;
    }

    wl1271_debug(DEBUG_BOOT, "rx %s cmd channel %d",
             enable ? "start" : "stop", cmd->channel);

    ret = wl1271_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("tx %s cmd for channel %d failed",
                 enable ? "start" : "stop", cmd->channel);
        goto out;
    }

    wl1271_debug(DEBUG_BOOT, "tx %s cmd channel %d",
             enable ? "start" : "stop", cmd->channel);

out:
    kfree(cmd);
    return ret;
}
EXPORT_SYMBOL_GPL(wl1271_cmd_data_path);

int wl1271_cmd_ps_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
               u8 ps_mode, u16 auto_ps_timeout)
{
    struct wl1271_cmd_ps_params *ps_params = NULL;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd set ps mode");

    ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
    if (!ps_params) {
        ret = -ENOMEM;
        goto out;
    }

    ps_params->role_id = wlvif->role_id;
    ps_params->ps_mode = ps_mode;
    ps_params->auto_ps_timeout = auto_ps_timeout;

    ret = wl1271_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
                  sizeof(*ps_params), 0);
    if (ret < 0) {
        wl1271_error("cmd set_ps_mode failed");
        goto out;
    }

out:
    kfree(ps_params);
    return ret;
}

int wl1271_cmd_template_set(struct wl1271 *wl, u8 role_id,
                u16 template_id, void *buf, size_t buf_len,
                int index, u32 rates)
{
    struct wl1271_cmd_template_set *cmd;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd template_set %d (role %d)",
             template_id, role_id);

    WARN_ON(buf_len > WL1271_CMD_TEMPL_MAX_SIZE);
    buf_len = min_t(size_t, buf_len, WL1271_CMD_TEMPL_MAX_SIZE);

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    /* during initialization wlvif is NULL */
    cmd->role_id = role_id;
    cmd->len = cpu_to_le16(buf_len);
    cmd->template_type = template_id;
    cmd->enabled_rates = cpu_to_le32(rates);
    cmd->short_retry_limit = wl->conf.tx.tmpl_short_retry_limit;
    cmd->long_retry_limit = wl->conf.tx.tmpl_long_retry_limit;
    cmd->index = index;

    if (buf)
        memcpy(cmd->template_data, buf, buf_len);

    ret = wl1271_cmd_send(wl, CMD_SET_TEMPLATE, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_warning("cmd set_template failed: %d", ret);
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_build_null_data(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    struct sk_buff *skb = NULL;
    int size;
    void *ptr;
    int ret = -ENOMEM;


    if (wlvif->bss_type == BSS_TYPE_IBSS) {
        size = sizeof(struct wl12xx_null_data_template);
        ptr = NULL;
    } else {
        skb = ieee80211_nullfunc_get(wl->hw,
                         wl12xx_wlvif_to_vif(wlvif));
        if (!skb)
            goto out;
        size = skb->len;
        ptr = skb->data;
    }

    ret = wl1271_cmd_template_set(wl, wlvif->role_id,
                      CMD_TEMPL_NULL_DATA, ptr, size, 0,
                      wlvif->basic_rate);

out:
    dev_kfree_skb(skb);
    if (ret)
        wl1271_warning("cmd buld null data failed %d", ret);

    return ret;

}

int wl12xx_cmd_build_klv_null_data(struct wl1271 *wl,
                   struct wl12xx_vif *wlvif)
{
    struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
    struct sk_buff *skb = NULL;
    int ret = -ENOMEM;

    skb = ieee80211_nullfunc_get(wl->hw, vif);
    if (!skb)
        goto out;

    ret = wl1271_cmd_template_set(wl, wlvif->role_id, CMD_TEMPL_KLV,
                      skb->data, skb->len,
                      wlvif->sta.klv_template_id,
                      wlvif->basic_rate);

out:
    dev_kfree_skb(skb);
    if (ret)
        wl1271_warning("cmd build klv null data failed %d", ret);

    return ret;

}

int wl1271_cmd_build_ps_poll(struct wl1271 *wl, struct wl12xx_vif *wlvif,
                 u16 aid)
{
    struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
    struct sk_buff *skb;
    int ret = 0;

    skb = ieee80211_pspoll_get(wl->hw, vif);
    if (!skb)
        goto out;

    ret = wl1271_cmd_template_set(wl, wlvif->role_id,
                      CMD_TEMPL_PS_POLL, skb->data,
                      skb->len, 0, wlvif->basic_rate_set);

out:
    dev_kfree_skb(skb);
    return ret;
}

int wl12xx_cmd_build_probe_req(struct wl1271 *wl, struct wl12xx_vif *wlvif,
                   u8 role_id, u8 band,
                   const u8 *ssid, size_t ssid_len,
                   const u8 *ie, size_t ie_len, bool sched_scan)
{
    struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
    struct sk_buff *skb;
    int ret;
    u32 rate;
    u16 template_id_2_4 = CMD_TEMPL_CFG_PROBE_REQ_2_4;
    u16 template_id_5 = CMD_TEMPL_CFG_PROBE_REQ_5;

    skb = ieee80211_probereq_get(wl->hw, vif, ssid, ssid_len,
                     ie, ie_len);
    if (!skb) {
        ret = -ENOMEM;
        goto out;
    }

    wl1271_dump(DEBUG_SCAN, "PROBE REQ: ", skb->data, skb->len);

    if (!sched_scan &&
        (wl->quirks & WLCORE_QUIRK_DUAL_PROBE_TMPL)) {
        template_id_2_4 = CMD_TEMPL_APP_PROBE_REQ_2_4;
        template_id_5 = CMD_TEMPL_APP_PROBE_REQ_5;
    }

    rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[band]);
    if (band == IEEE80211_BAND_2GHZ)
        ret = wl1271_cmd_template_set(wl, role_id,
                          template_id_2_4,
                          skb->data, skb->len, 0, rate);
    else
        ret = wl1271_cmd_template_set(wl, role_id,
                          template_id_5,
                          skb->data, skb->len, 0, rate);

out:
    dev_kfree_skb(skb);
    return ret;
}

struct sk_buff *wl1271_cmd_build_ap_probe_req(struct wl1271 *wl,
                          struct wl12xx_vif *wlvif,
                          struct sk_buff *skb)
{
    struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
    int ret;
    u32 rate;

    if (!skb)
        skb = ieee80211_ap_probereq_get(wl->hw, vif);
    if (!skb)
        goto out;

    wl1271_dump(DEBUG_SCAN, "AP PROBE REQ: ", skb->data, skb->len);

    rate = wl1271_tx_min_rate_get(wl, wlvif->bitrate_masks[wlvif->band]);
    if (wlvif->band == IEEE80211_BAND_2GHZ)
        ret = wl1271_cmd_template_set(wl, wlvif->role_id,
                          CMD_TEMPL_CFG_PROBE_REQ_2_4,
                          skb->data, skb->len, 0, rate);
    else
        ret = wl1271_cmd_template_set(wl, wlvif->role_id,
                          CMD_TEMPL_CFG_PROBE_REQ_5,
                          skb->data, skb->len, 0, rate);

    if (ret < 0)
        wl1271_error("Unable to set ap probe request template.");

out:
    return skb;
}

int wl1271_cmd_build_arp_rsp(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    int ret, extra = 0;
    u16 fc;
    struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
    struct sk_buff *skb;
    struct wl12xx_arp_rsp_template *tmpl;
    struct ieee80211_hdr_3addr *hdr;
    struct arphdr *arp_hdr;

    skb = dev_alloc_skb(sizeof(*hdr) + sizeof(__le16) + sizeof(*tmpl) +
                WL1271_EXTRA_SPACE_MAX);
    if (!skb) {
        wl1271_error("failed to allocate buffer for arp rsp template");
        return -ENOMEM;
    }

    skb_reserve(skb, sizeof(*hdr) + WL1271_EXTRA_SPACE_MAX);

    tmpl = (struct wl12xx_arp_rsp_template *)skb_put(skb, sizeof(*tmpl));
    memset(tmpl, 0, sizeof(*tmpl));

    /* llc layer */
    memcpy(tmpl->llc_hdr, rfc1042_header, sizeof(rfc1042_header));
    tmpl->llc_type = cpu_to_be16(ETH_P_ARP);

    /* arp header */
    arp_hdr = &tmpl->arp_hdr;
    arp_hdr->ar_hrd = cpu_to_be16(ARPHRD_ETHER);
    arp_hdr->ar_pro = cpu_to_be16(ETH_P_IP);
    arp_hdr->ar_hln = ETH_ALEN;
    arp_hdr->ar_pln = 4;
    arp_hdr->ar_op = cpu_to_be16(ARPOP_REPLY);

    /* arp payload */
    memcpy(tmpl->sender_hw, vif->addr, ETH_ALEN);
    tmpl->sender_ip = wlvif->ip_addr;

    /* encryption space */
    switch (wlvif->encryption_type) {
    case KEY_TKIP:
        if (wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE)
            extra = WL1271_EXTRA_SPACE_TKIP;
        break;
    case KEY_AES:
        extra = WL1271_EXTRA_SPACE_AES;
        break;
    case KEY_NONE:
    case KEY_WEP:
    case KEY_GEM:
        extra = 0;
        break;
    default:
        wl1271_warning("Unknown encryption type: %d",
                   wlvif->encryption_type);
        ret = -EINVAL;
        goto out;
    }

    if (extra) {
        u8 *space = skb_push(skb, extra);
        memset(space, 0, extra);
    }

    /* QoS header - BE */
    if (wlvif->sta.qos)
        memset(skb_push(skb, sizeof(__le16)), 0, sizeof(__le16));

    /* mac80211 header */
    hdr = (struct ieee80211_hdr_3addr *)skb_push(skb, sizeof(*hdr));
    memset(hdr, 0, sizeof(*hdr));
    fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_TODS;
    if (wlvif->sta.qos)
        fc |= IEEE80211_STYPE_QOS_DATA;
    else
        fc |= IEEE80211_STYPE_DATA;
    if (wlvif->encryption_type != KEY_NONE)
        fc |= IEEE80211_FCTL_PROTECTED;

    hdr->frame_control = cpu_to_le16(fc);
    memcpy(hdr->addr1, vif->bss_conf.bssid, ETH_ALEN);
    memcpy(hdr->addr2, vif->addr, ETH_ALEN);
    memset(hdr->addr3, 0xff, ETH_ALEN);

    ret = wl1271_cmd_template_set(wl, wlvif->role_id, CMD_TEMPL_ARP_RSP,
                      skb->data, skb->len, 0,
                      wlvif->basic_rate);
out:
    dev_kfree_skb(skb);
    return ret;
}

int wl1271_build_qos_null_data(struct wl1271 *wl, struct ieee80211_vif *vif)
{
    struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
    struct ieee80211_qos_hdr template;

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

    memcpy(template.addr1, vif->bss_conf.bssid, ETH_ALEN);
    memcpy(template.addr2, vif->addr, ETH_ALEN);
    memcpy(template.addr3, vif->bss_conf.bssid, ETH_ALEN);

    template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
                         IEEE80211_STYPE_QOS_NULLFUNC |
                         IEEE80211_FCTL_TODS);

    /* FIXME: not sure what priority to use here */
    template.qos_ctrl = cpu_to_le16(0);

    return wl1271_cmd_template_set(wl, wlvif->role_id,
                       CMD_TEMPL_QOS_NULL_DATA, &template,
                       sizeof(template), 0,
                       wlvif->basic_rate);
}

int wl12xx_cmd_set_default_wep_key(struct wl1271 *wl, u8 id, u8 hlid)
{
    struct wl1271_cmd_set_keys *cmd;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd set_default_wep_key %d", id);

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->hlid = hlid;
    cmd->key_id = id;
    cmd->lid_key_type = WEP_DEFAULT_LID_TYPE;
    cmd->key_action = cpu_to_le16(KEY_SET_ID);
    cmd->key_type = KEY_WEP;

    ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_warning("cmd set_default_wep_key failed: %d", ret);
        goto out;
    }

out:
    kfree(cmd);

    return ret;
}

int wl1271_cmd_set_sta_key(struct wl1271 *wl, struct wl12xx_vif *wlvif,
               u16 action, u8 id, u8 key_type,
               u8 key_size, const u8 *key, const u8 *addr,
               u32 tx_seq_32, u16 tx_seq_16)
{
    struct wl1271_cmd_set_keys *cmd;
    int ret = 0;

    /* hlid might have already been deleted */
    if (wlvif->sta.hlid == WL12XX_INVALID_LINK_ID)
        return 0;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->hlid = wlvif->sta.hlid;

    if (key_type == KEY_WEP)
        cmd->lid_key_type = WEP_DEFAULT_LID_TYPE;
    else if (is_broadcast_ether_addr(addr))
        cmd->lid_key_type = BROADCAST_LID_TYPE;
    else
        cmd->lid_key_type = UNICAST_LID_TYPE;

    cmd->key_action = cpu_to_le16(action);
    cmd->key_size = key_size;
    cmd->key_type = key_type;

    cmd->ac_seq_num16[0] = cpu_to_le16(tx_seq_16);
    cmd->ac_seq_num32[0] = cpu_to_le32(tx_seq_32);

    cmd->key_id = id;

    if (key_type == KEY_TKIP) {
        /*
         * We get the key in the following form:
         * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
         * but the target is expecting:
         * TKIP - RX MIC - TX MIC
         */
        memcpy(cmd->key, key, 16);
        memcpy(cmd->key + 16, key + 24, 8);
        memcpy(cmd->key + 24, key + 16, 8);

    } else {
        memcpy(cmd->key, key, key_size);
    }

    wl1271_dump(DEBUG_CRYPT, "TARGET KEY: ", cmd, sizeof(*cmd));

    ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_warning("could not set keys");
    goto out;
    }

out:
    kfree(cmd);

    return ret;
}

/*
 * TODO: merge with sta/ibss into 1 set_key function.
 * note there are slight diffs
 */
int wl1271_cmd_set_ap_key(struct wl1271 *wl, struct wl12xx_vif *wlvif,
              u16 action, u8 id, u8 key_type,
              u8 key_size, const u8 *key, u8 hlid, u32 tx_seq_32,
              u16 tx_seq_16)
{
    struct wl1271_cmd_set_keys *cmd;
    int ret = 0;
    u8 lid_type;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd)
        return -ENOMEM;

    if (hlid == wlvif->ap.bcast_hlid) {
        if (key_type == KEY_WEP)
            lid_type = WEP_DEFAULT_LID_TYPE;
        else
            lid_type = BROADCAST_LID_TYPE;
    } else {
        lid_type = UNICAST_LID_TYPE;
    }

    wl1271_debug(DEBUG_CRYPT, "ap key action: %d id: %d lid: %d type: %d"
             " hlid: %d", (int)action, (int)id, (int)lid_type,
             (int)key_type, (int)hlid);

    cmd->lid_key_type = lid_type;
    cmd->hlid = hlid;
    cmd->key_action = cpu_to_le16(action);
    cmd->key_size = key_size;
    cmd->key_type = key_type;
    cmd->key_id = id;
    cmd->ac_seq_num16[0] = cpu_to_le16(tx_seq_16);
    cmd->ac_seq_num32[0] = cpu_to_le32(tx_seq_32);

    if (key_type == KEY_TKIP) {
        /*
         * We get the key in the following form:
         * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
         * but the target is expecting:
         * TKIP - RX MIC - TX MIC
         */
        memcpy(cmd->key, key, 16);
        memcpy(cmd->key + 16, key + 24, 8);
        memcpy(cmd->key + 24, key + 16, 8);
    } else {
        memcpy(cmd->key, key, key_size);
    }

    wl1271_dump(DEBUG_CRYPT, "TARGET AP KEY: ", cmd, sizeof(*cmd));

    ret = wl1271_cmd_send(wl, CMD_SET_KEYS, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_warning("could not set ap keys");
        goto out;
    }

out:
    kfree(cmd);
    return ret;
}

int wl12xx_cmd_set_peer_state(struct wl1271 *wl, u8 hlid)
{
    struct wl12xx_cmd_set_peer_state *cmd;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd set peer state (hlid=%d)", hlid);

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->hlid = hlid;
    cmd->state = WL1271_CMD_STA_STATE_CONNECTED;

    ret = wl1271_cmd_send(wl, CMD_SET_PEER_STATE, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to send set peer state command");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_add_peer(struct wl1271 *wl, struct wl12xx_vif *wlvif,
            struct ieee80211_sta *sta, u8 hlid)
{
    struct wl12xx_cmd_add_peer *cmd;
    int i, ret;
    u32 sta_rates;

    wl1271_debug(DEBUG_CMD, "cmd add peer %d", (int)hlid);

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    memcpy(cmd->addr, sta->addr, ETH_ALEN);
    cmd->bss_index = WL1271_AP_BSS_INDEX;
    cmd->aid = sta->aid;
    cmd->hlid = hlid;
    cmd->sp_len = sta->max_sp;
    cmd->wmm = sta->wme ? 1 : 0;

    for (i = 0; i < NUM_ACCESS_CATEGORIES_COPY; i++)
        if (sta->wme && (sta->uapsd_queues & BIT(i)))
            cmd->psd_type[NUM_ACCESS_CATEGORIES_COPY-1-i] =
                    WL1271_PSD_UPSD_TRIGGER;
        else
            cmd->psd_type[NUM_ACCESS_CATEGORIES_COPY-1-i] =
                    WL1271_PSD_LEGACY;


    sta_rates = sta->supp_rates[wlvif->band];
    if (sta->ht_cap.ht_supported)
        sta_rates |=
            (sta->ht_cap.mcs.rx_mask[0] << HW_HT_RATES_OFFSET) |
            (sta->ht_cap.mcs.rx_mask[1] << HW_MIMO_RATES_OFFSET);

    cmd->supported_rates =
        cpu_to_le32(wl1271_tx_enabled_rates_get(wl, sta_rates,
                            wlvif->band));

    wl1271_debug(DEBUG_CMD, "new peer rates=0x%x queues=0x%x",
             cmd->supported_rates, sta->uapsd_queues);

    ret = wl1271_cmd_send(wl, CMD_ADD_PEER, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd add peer");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_remove_peer(struct wl1271 *wl, u8 hlid)
{
    struct wl12xx_cmd_remove_peer *cmd;
    int ret;
    bool timeout = false;

    wl1271_debug(DEBUG_CMD, "cmd remove peer %d", (int)hlid);

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->hlid = hlid;
    /* We never send a deauth, mac80211 is in charge of this */
    cmd->reason_opcode = 0;
    cmd->send_deauth_flag = 0;

    ret = wl1271_cmd_send(wl, CMD_REMOVE_PEER, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to initiate cmd remove peer");
        goto out_free;
    }

    ret = wl1271_cmd_wait_for_event_or_timeout(wl,
                       PEER_REMOVE_COMPLETE_EVENT_ID,
                       &timeout);
    /*
     * We are ok with a timeout here. The event is sometimes not sent
     * due to a firmware bug. In case of another error (like SDIO timeout)
     * queue a recovery.
     */
    if (ret)
        wl12xx_queue_recovery_work(wl);

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_config_fwlog(struct wl1271 *wl)
{
    struct wl12xx_cmd_config_fwlog *cmd;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd config firmware logger");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->logger_mode = wl->conf.fwlog.mode;
    cmd->log_severity = wl->conf.fwlog.severity;
    cmd->timestamp = wl->conf.fwlog.timestamp;
    cmd->output = wl->conf.fwlog.output;
    cmd->threshold = wl->conf.fwlog.threshold;

    ret = wl1271_cmd_send(wl, CMD_CONFIG_FWLOGGER, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to send config firmware logger command");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_start_fwlog(struct wl1271 *wl)
{
    struct wl12xx_cmd_start_fwlog *cmd;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd start firmware logger");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    ret = wl1271_cmd_send(wl, CMD_START_FWLOGGER, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to send start firmware logger command");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_stop_fwlog(struct wl1271 *wl)
{
    struct wl12xx_cmd_stop_fwlog *cmd;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd stop firmware logger");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    ret = wl1271_cmd_send(wl, CMD_STOP_FWLOGGER, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to send stop firmware logger command");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

static int wl12xx_cmd_roc(struct wl1271 *wl, struct wl12xx_vif *wlvif,
              u8 role_id)
{
    struct wl12xx_cmd_roc *cmd;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd roc %d (%d)", wlvif->channel, role_id);

    if (WARN_ON(role_id == WL12XX_INVALID_ROLE_ID))
        return -EINVAL;

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->role_id = role_id;
    cmd->channel = wlvif->channel;
    switch (wlvif->band) {
    case IEEE80211_BAND_2GHZ:
        cmd->band = WLCORE_BAND_2_4GHZ;
        break;
    case IEEE80211_BAND_5GHZ:
        cmd->band = WLCORE_BAND_5GHZ;
        break;
    default:
        wl1271_error("roc - unknown band: %d", (int)wlvif->band);
        ret = -EINVAL;
        goto out_free;
    }


    ret = wl1271_cmd_send(wl, CMD_REMAIN_ON_CHANNEL, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to send ROC command");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

static int wl12xx_cmd_croc(struct wl1271 *wl, u8 role_id)
{
    struct wl12xx_cmd_croc *cmd;
    int ret = 0;

    wl1271_debug(DEBUG_CMD, "cmd croc (%d)", role_id);

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }
    cmd->role_id = role_id;

    ret = wl1271_cmd_send(wl, CMD_CANCEL_REMAIN_ON_CHANNEL, cmd,
                  sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to send ROC command");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_roc(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 role_id)
{
    int ret = 0;
    bool is_first_roc;

    if (WARN_ON(test_bit(role_id, wl->roc_map)))
        return 0;

    is_first_roc = (find_first_bit(wl->roc_map, WL12XX_MAX_ROLES) >=
            WL12XX_MAX_ROLES);

    ret = wl12xx_cmd_roc(wl, wlvif, role_id);
    if (ret < 0)
        goto out;

    if (is_first_roc) {
        ret = wl1271_cmd_wait_for_event(wl,
                       REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID);
        if (ret < 0) {
            wl1271_error("cmd roc event completion error");
            goto out;
        }
    }

    __set_bit(role_id, wl->roc_map);
out:
    return ret;
}

int wl12xx_croc(struct wl1271 *wl, u8 role_id)
{
    int ret = 0;

    if (WARN_ON(!test_bit(role_id, wl->roc_map)))
        return 0;

    ret = wl12xx_cmd_croc(wl, role_id);
    if (ret < 0)
        goto out;

    __clear_bit(role_id, wl->roc_map);

    /*
     * Rearm the tx watchdog when removing the last ROC. This prevents
     * recoveries due to just finished ROCs - when Tx hasn't yet had
     * a chance to get out.
     */
    if (find_first_bit(wl->roc_map, WL12XX_MAX_ROLES) >= WL12XX_MAX_ROLES)
        wl12xx_rearm_tx_watchdog_locked(wl);
out:
    return ret;
}

int wl12xx_cmd_channel_switch(struct wl1271 *wl,
                  struct wl12xx_vif *wlvif,
                  struct ieee80211_channel_switch *ch_switch)
{
    struct wl12xx_cmd_channel_switch *cmd;
    int ret;

    wl1271_debug(DEBUG_ACX, "cmd channel switch");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->role_id = wlvif->role_id;
    cmd->channel = ch_switch->channel->hw_value;
    cmd->switch_time = ch_switch->count;
    cmd->stop_tx = ch_switch->block_tx;

    /* FIXME: control from mac80211 in the future */
    cmd->post_switch_tx_disable = 0;  /* Enable TX on the target channel */

    ret = wl1271_cmd_send(wl, CMD_CHANNEL_SWITCH, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to send channel switch command");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

int wl12xx_cmd_stop_channel_switch(struct wl1271 *wl)
{
    struct wl12xx_cmd_stop_channel_switch *cmd;
    int ret;

    wl1271_debug(DEBUG_ACX, "cmd stop channel switch");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    ret = wl1271_cmd_send(wl, CMD_STOP_CHANNEL_SWICTH, cmd, sizeof(*cmd), 0);
    if (ret < 0) {
        wl1271_error("failed to stop channel switch command");
        goto out_free;
    }

out_free:
    kfree(cmd);

out:
    return ret;
}

/* start dev role and roc on its channel */
int wl12xx_start_dev(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    int ret;

    if (WARN_ON(!(wlvif->bss_type == BSS_TYPE_STA_BSS ||
              wlvif->bss_type == BSS_TYPE_IBSS)))
        return -EINVAL;

    ret = wl12xx_cmd_role_enable(wl,
                     wl12xx_wlvif_to_vif(wlvif)->addr,
                     WL1271_ROLE_DEVICE,
                     &wlvif->dev_role_id);
    if (ret < 0)
        goto out;

    ret = wl12xx_cmd_role_start_dev(wl, wlvif);
    if (ret < 0)
        goto out_disable;

    ret = wl12xx_roc(wl, wlvif, wlvif->dev_role_id);
    if (ret < 0)
        goto out_stop;

    return 0;

out_stop:
    wl12xx_cmd_role_stop_dev(wl, wlvif);
out_disable:
    wl12xx_cmd_role_disable(wl, &wlvif->dev_role_id);
out:
    return ret;
}

/* croc dev hlid, and stop the role */
int wl12xx_stop_dev(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
    int ret;

    if (WARN_ON(!(wlvif->bss_type == BSS_TYPE_STA_BSS ||
              wlvif->bss_type == BSS_TYPE_IBSS)))
        return -EINVAL;

    /* flush all pending packets */
    ret = wlcore_tx_work_locked(wl);
    if (ret < 0)
        goto out;

    if (test_bit(wlvif->dev_role_id, wl->roc_map)) {
        ret = wl12xx_croc(wl, wlvif->dev_role_id);
        if (ret < 0)
            goto out;
    }

    ret = wl12xx_cmd_role_stop_dev(wl, wlvif);
    if (ret < 0)
        goto out;

    ret = wl12xx_cmd_role_disable(wl, &wlvif->dev_role_id);
    if (ret < 0)
        goto out;

out:
    return ret;
}