/*
 * Copyright (c) 2004-2011 Atheros Communications Inc.
 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/ip.h>
#include <linux/in.h>
#include "core.h"
#include "debug.h"
#include "testmode.h"
#include "../regd.h"
#include "../regd_common.h"

static int ath6kl_wmi_sync_point(struct wmi *wmi, u8 if_idx);

static const s32 wmi_rate_tbl[][2] = {
        /* {W/O SGI, with SGI} */
        {1000, 1000},
        {2000, 2000},
        {5500, 5500},
        {11000, 11000},
        {6000, 6000},
        {9000, 9000},
        {12000, 12000},
        {18000, 18000},
        {24000, 24000},
        {36000, 36000},
        {48000, 48000},
        {54000, 54000},
        {6500, 7200},
        {13000, 14400},
        {19500, 21700},
        {26000, 28900},
        {39000, 43300},
        {52000, 57800},
        {58500, 65000},
        {65000, 72200},
        {13500, 15000},
        {27000, 30000},
        {40500, 45000},
        {54000, 60000},
        {81000, 90000},
        {108000, 120000},
        {121500, 135000},
        {135000, 150000},
        {0, 0}
};

/* 802.1d to AC mapping. Refer pg 57 of WMM-test-plan-v1.2 */
static const u8 up_to_ac[] = {
        WMM_AC_BE,
        WMM_AC_BK,
        WMM_AC_BK,
        WMM_AC_BE,
        WMM_AC_VI,
        WMM_AC_VI,
        WMM_AC_VO,
        WMM_AC_VO,
};

void ath6kl_wmi_set_control_ep(struct wmi *wmi, enum htc_endpoint_id ep_id)
{
        if (WARN_ON(ep_id == ENDPOINT_UNUSED || ep_id >= ENDPOINT_MAX))
                return;

        wmi->ep_id = ep_id;
}

enum htc_endpoint_id ath6kl_wmi_get_control_ep(struct wmi *wmi)
{
        return wmi->ep_id;
}

struct ath6kl_vif *ath6kl_get_vif_by_index(struct ath6kl *ar, u8 if_idx)
{
        struct ath6kl_vif *vif, *found = NULL;

        if (WARN_ON(if_idx > (ar->vif_max - 1)))
                return NULL;

        /* FIXME: Locking */
        spin_lock_bh(&ar->list_lock);
        list_for_each_entry(vif, &ar->vif_list, list) {
                if (vif->fw_vif_idx == if_idx) {
                        found = vif;
                        break;
                }
        }
        spin_unlock_bh(&ar->list_lock);

        return found;
}

/*  Performs DIX to 802.3 encapsulation for transmit packets.
 *  Assumes the entire DIX header is contigous and that there is
 *  enough room in the buffer for a 802.3 mac header and LLC+SNAP headers.
 */
int ath6kl_wmi_dix_2_dot3(struct wmi *wmi, struct sk_buff *skb)
{
        struct ath6kl_llc_snap_hdr *llc_hdr;
        struct ethhdr *eth_hdr;
        size_t new_len;
        __be16 type;
        u8 *datap;
        u16 size;

        if (WARN_ON(skb == NULL))
                return -EINVAL;

        size = sizeof(struct ath6kl_llc_snap_hdr) + sizeof(struct wmi_data_hdr);
        if (skb_headroom(skb) < size)
                return -ENOMEM;

        eth_hdr = (struct ethhdr *) skb->data;
        type = eth_hdr->h_proto;

        if (!is_ethertype(be16_to_cpu(type))) {
                ath6kl_dbg(ATH6KL_DBG_WMI,
                           "%s: pkt is already in 802.3 format\n", __func__);
                return 0;
        }

        new_len = skb->len - sizeof(*eth_hdr) + sizeof(*llc_hdr);

        skb_push(skb, sizeof(struct ath6kl_llc_snap_hdr));
        datap = skb->data;

        eth_hdr->h_proto = cpu_to_be16(new_len);

        memcpy(datap, eth_hdr, sizeof(*eth_hdr));

        llc_hdr = (struct ath6kl_llc_snap_hdr *)(datap + sizeof(*eth_hdr));
        llc_hdr->dsap = 0xAA;
        llc_hdr->ssap = 0xAA;
        llc_hdr->cntl = 0x03;
        llc_hdr->org_code[0] = 0x0;
        llc_hdr->org_code[1] = 0x0;
        llc_hdr->org_code[2] = 0x0;
        llc_hdr->eth_type = type;

        return 0;
}

static int ath6kl_wmi_meta_add(struct wmi *wmi, struct sk_buff *skb,
                               u8 *version, void *tx_meta_info)
{
        struct wmi_tx_meta_v1 *v1;
        struct wmi_tx_meta_v2 *v2;

        if (WARN_ON(skb == NULL || version == NULL))
                return -EINVAL;

        switch (*version) {
        case WMI_META_VERSION_1:
                skb_push(skb, WMI_MAX_TX_META_SZ);
                v1 = (struct wmi_tx_meta_v1 *) skb->data;
                v1->pkt_id = 0;
                v1->rate_plcy_id = 0;
                *version = WMI_META_VERSION_1;
                break;
        case WMI_META_VERSION_2:
                skb_push(skb, WMI_MAX_TX_META_SZ);
                v2 = (struct wmi_tx_meta_v2 *) skb->data;
                memcpy(v2, (struct wmi_tx_meta_v2 *) tx_meta_info,
                       sizeof(struct wmi_tx_meta_v2));
                break;
        }

        return 0;
}

int ath6kl_wmi_data_hdr_add(struct wmi *wmi, struct sk_buff *skb,
                            u8 msg_type, u32 flags,
                            enum wmi_data_hdr_data_type data_type,
                            u8 meta_ver, void *tx_meta_info, u8 if_idx)
{
        struct wmi_data_hdr *data_hdr;
        int ret;

        if (WARN_ON(skb == NULL || (if_idx > wmi->parent_dev->vif_max - 1)))
                return -EINVAL;

        if (tx_meta_info) {
                ret = ath6kl_wmi_meta_add(wmi, skb, &meta_ver, tx_meta_info);
                if (ret)
                        return ret;
        }

        skb_push(skb, sizeof(struct wmi_data_hdr));

        data_hdr = (struct wmi_data_hdr *)skb->data;
        memset(data_hdr, 0, sizeof(struct wmi_data_hdr));

        data_hdr->info = msg_type << WMI_DATA_HDR_MSG_TYPE_SHIFT;
        data_hdr->info |= data_type << WMI_DATA_HDR_DATA_TYPE_SHIFT;

        if (flags & WMI_DATA_HDR_FLAGS_MORE)
                data_hdr->info |= WMI_DATA_HDR_MORE;

        if (flags & WMI_DATA_HDR_FLAGS_EOSP)
                data_hdr->info3 |= cpu_to_le16(WMI_DATA_HDR_EOSP);

        data_hdr->info2 |= cpu_to_le16(meta_ver << WMI_DATA_HDR_META_SHIFT);
        data_hdr->info3 |= cpu_to_le16(if_idx & WMI_DATA_HDR_IF_IDX_MASK);

        return 0;
}

u8 ath6kl_wmi_determine_user_priority(u8 *pkt, u32 layer2_pri)
{
        struct iphdr *ip_hdr = (struct iphdr *) pkt;
        u8 ip_pri;

        /*
         * Determine IPTOS priority
         *
         * IP-TOS - 8bits
         *          : DSCP(6-bits) ECN(2-bits)
         *          : DSCP - P2 P1 P0 X X X
         * where (P2 P1 P0) form 802.1D
         */
        ip_pri = ip_hdr->tos >> 5;
        ip_pri &= 0x7;

        if ((layer2_pri & 0x7) > ip_pri)
                return (u8) layer2_pri & 0x7;
        else
                return ip_pri;
}

u8 ath6kl_wmi_get_traffic_class(u8 user_priority)
{
        return  up_to_ac[user_priority & 0x7];
}

int ath6kl_wmi_implicit_create_pstream(struct wmi *wmi, u8 if_idx,
                                       struct sk_buff *skb,
                                       u32 layer2_priority, bool wmm_enabled,
                                       u8 *ac)
{
        struct wmi_data_hdr *data_hdr;
        struct ath6kl_llc_snap_hdr *llc_hdr;
        struct wmi_create_pstream_cmd cmd;
        u32 meta_size, hdr_size;
        u16 ip_type = IP_ETHERTYPE;
        u8 stream_exist, usr_pri;
        u8 traffic_class = WMM_AC_BE;
        u8 *datap;

        if (WARN_ON(skb == NULL))
                return -EINVAL;

        datap = skb->data;
        data_hdr = (struct wmi_data_hdr *) datap;

        meta_size = ((le16_to_cpu(data_hdr->info2) >> WMI_DATA_HDR_META_SHIFT) &
                     WMI_DATA_HDR_META_MASK) ? WMI_MAX_TX_META_SZ : 0;

        if (!wmm_enabled) {
                /* If WMM is disabled all traffic goes as BE traffic */
                usr_pri = 0;
        } else {
                hdr_size = sizeof(struct ethhdr);

                llc_hdr = (struct ath6kl_llc_snap_hdr *)(datap +
                                                         sizeof(struct
                                                                wmi_data_hdr) +
                                                         meta_size + hdr_size);

                if (llc_hdr->eth_type == htons(ip_type)) {
                        /*
                         * Extract the endpoint info from the TOS field
                         * in the IP header.
                         */
                        usr_pri =
                           ath6kl_wmi_determine_user_priority(((u8 *) llc_hdr) +
                                        sizeof(struct ath6kl_llc_snap_hdr),
                                        layer2_priority);
                } else
                        usr_pri = layer2_priority & 0x7;

                /*
                 * Queue the EAPOL frames in the same WMM_AC_VO queue
                 * as that of management frames.
                 */
                if (skb->protocol == cpu_to_be16(ETH_P_PAE))
                        usr_pri = WMI_VOICE_USER_PRIORITY;
        }

        /*
         * workaround for WMM S5
         *
         * FIXME: wmi->traffic_class is always 100 so this test doesn't
         * make sense
         */
        if ((wmi->traffic_class == WMM_AC_VI) &&
            ((usr_pri == 5) || (usr_pri == 4)))
                usr_pri = 1;

        /* Convert user priority to traffic class */
        traffic_class = up_to_ac[usr_pri & 0x7];

        wmi_data_hdr_set_up(data_hdr, usr_pri);

        spin_lock_bh(&wmi->lock);
        stream_exist = wmi->fat_pipe_exist;
        spin_unlock_bh(&wmi->lock);

        if (!(stream_exist & (1 << traffic_class))) {
                memset(&cmd, 0, sizeof(cmd));
                cmd.traffic_class = traffic_class;
                cmd.user_pri = usr_pri;
                cmd.inactivity_int =
                        cpu_to_le32(WMI_IMPLICIT_PSTREAM_INACTIVITY_INT);
                /* Implicit streams are created with TSID 0xFF */
                cmd.tsid = WMI_IMPLICIT_PSTREAM;
                ath6kl_wmi_create_pstream_cmd(wmi, if_idx, &cmd);
        }

        *ac = traffic_class;

        return 0;
}

int ath6kl_wmi_dot11_hdr_remove(struct wmi *wmi, struct sk_buff *skb)
{
        struct ieee80211_hdr_3addr *pwh, wh;
        struct ath6kl_llc_snap_hdr *llc_hdr;
        struct ethhdr eth_hdr;
        u32 hdr_size;
        u8 *datap;
        __le16 sub_type;

        if (WARN_ON(skb == NULL))
                return -EINVAL;

        datap = skb->data;
        pwh = (struct ieee80211_hdr_3addr *) datap;

        sub_type = pwh->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE);

        memcpy((u8 *) &wh, datap, sizeof(struct ieee80211_hdr_3addr));

        /* Strip off the 802.11 header */
        if (sub_type == cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
                hdr_size = roundup(sizeof(struct ieee80211_qos_hdr),
                                   sizeof(u32));
                skb_pull(skb, hdr_size);
        } else if (sub_type == cpu_to_le16(IEEE80211_STYPE_DATA))
                skb_pull(skb, sizeof(struct ieee80211_hdr_3addr));

        datap = skb->data;
        llc_hdr = (struct ath6kl_llc_snap_hdr *)(datap);

        memset(&eth_hdr, 0, sizeof(eth_hdr));
        eth_hdr.h_proto = llc_hdr->eth_type;

        switch ((le16_to_cpu(wh.frame_control)) &
                (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
        case 0:
                memcpy(eth_hdr.h_dest, wh.addr1, ETH_ALEN);
                memcpy(eth_hdr.h_source, wh.addr2, ETH_ALEN);
                break;
        case IEEE80211_FCTL_TODS:
                memcpy(eth_hdr.h_dest, wh.addr3, ETH_ALEN);
                memcpy(eth_hdr.h_source, wh.addr2, ETH_ALEN);
                break;
        case IEEE80211_FCTL_FROMDS:
                memcpy(eth_hdr.h_dest, wh.addr1, ETH_ALEN);
                memcpy(eth_hdr.h_source, wh.addr3, ETH_ALEN);
                break;
        case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
                break;
        }

        skb_pull(skb, sizeof(struct ath6kl_llc_snap_hdr));
        skb_push(skb, sizeof(eth_hdr));

        datap = skb->data;

        memcpy(datap, &eth_hdr, sizeof(eth_hdr));

        return 0;
}

/*
 * Performs 802.3 to DIX encapsulation for received packets.
 * Assumes the entire 802.3 header is contigous.
 */
int ath6kl_wmi_dot3_2_dix(struct sk_buff *skb)
{
        struct ath6kl_llc_snap_hdr *llc_hdr;
        struct ethhdr eth_hdr;
        u8 *datap;

        if (WARN_ON(skb == NULL))
                return -EINVAL;

        datap = skb->data;

        memcpy(&eth_hdr, datap, sizeof(eth_hdr));

        llc_hdr = (struct ath6kl_llc_snap_hdr *) (datap + sizeof(eth_hdr));
        eth_hdr.h_proto = llc_hdr->eth_type;

        skb_pull(skb, sizeof(struct ath6kl_llc_snap_hdr));
        datap = skb->data;

        memcpy(datap, &eth_hdr, sizeof(eth_hdr));

        return 0;
}

static int ath6kl_wmi_tx_complete_event_rx(u8 *datap, int len)
{
        struct tx_complete_msg_v1 *msg_v1;
        struct wmi_tx_complete_event *evt;
        int index;
        u16 size;

        evt = (struct wmi_tx_complete_event *) datap;

        ath6kl_dbg(ATH6KL_DBG_WMI, "comp: %d %d %d\n",
                   evt->num_msg, evt->msg_len, evt->msg_type);

        for (index = 0; index < evt->num_msg; index++) {
                size = sizeof(struct wmi_tx_complete_event) +
                    (index * sizeof(struct tx_complete_msg_v1));
                msg_v1 = (struct tx_complete_msg_v1 *)(datap + size);

                ath6kl_dbg(ATH6KL_DBG_WMI, "msg: %d %d %d %d\n",
                           msg_v1->status, msg_v1->pkt_id,
                           msg_v1->rate_idx, msg_v1->ack_failures);
        }

        return 0;
}

static int ath6kl_wmi_remain_on_chnl_event_rx(struct wmi *wmi, u8 *datap,
                                              int len, struct ath6kl_vif *vif)
{
        struct wmi_remain_on_chnl_event *ev;
        u32 freq;
        u32 dur;
        struct ieee80211_channel *chan;
        struct ath6kl *ar = wmi->parent_dev;
        u32 id;

        if (len < sizeof(*ev))
                return -EINVAL;

        ev = (struct wmi_remain_on_chnl_event *) datap;
        freq = le32_to_cpu(ev->freq);
        dur = le32_to_cpu(ev->duration);
        ath6kl_dbg(ATH6KL_DBG_WMI, "remain_on_chnl: freq=%u dur=%u\n",
                   freq, dur);
        chan = ieee80211_get_channel(ar->wiphy, freq);
        if (!chan) {
                ath6kl_dbg(ATH6KL_DBG_WMI,
                           "remain_on_chnl: Unknown channel (freq=%u)\n",
                           freq);
                return -EINVAL;
        }
        id = vif->last_roc_id;
        cfg80211_ready_on_channel(&vif->wdev, id, chan, NL80211_CHAN_NO_HT,
                                  dur, GFP_ATOMIC);

        return 0;
}

static int ath6kl_wmi_cancel_remain_on_chnl_event_rx(struct wmi *wmi,
                                                     u8 *datap, int len,
                                                     struct ath6kl_vif *vif)
{
        struct wmi_cancel_remain_on_chnl_event *ev;
        u32 freq;
        u32 dur;
        struct ieee80211_channel *chan;
        struct ath6kl *ar = wmi->parent_dev;
        u32 id;

        if (len < sizeof(*ev))
                return -EINVAL;

        ev = (struct wmi_cancel_remain_on_chnl_event *) datap;
        freq = le32_to_cpu(ev->freq);
        dur = le32_to_cpu(ev->duration);
        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "cancel_remain_on_chnl: freq=%u dur=%u status=%u\n",
                   freq, dur, ev->status);
        chan = ieee80211_get_channel(ar->wiphy, freq);
        if (!chan) {
                ath6kl_dbg(ATH6KL_DBG_WMI,
                           "cancel_remain_on_chnl: Unknown channel (freq=%u)\n",
                           freq);
                return -EINVAL;
        }
        if (vif->last_cancel_roc_id &&
            vif->last_cancel_roc_id + 1 == vif->last_roc_id)
                id = vif->last_cancel_roc_id; /* event for cancel command */
        else
                id = vif->last_roc_id; /* timeout on uncanceled r-o-c */
        vif->last_cancel_roc_id = 0;
        cfg80211_remain_on_channel_expired(&vif->wdev, id, chan,
                                           NL80211_CHAN_NO_HT, GFP_ATOMIC);

        return 0;
}

static int ath6kl_wmi_tx_status_event_rx(struct wmi *wmi, u8 *datap, int len,
                                         struct ath6kl_vif *vif)
{
        struct wmi_tx_status_event *ev;
        u32 id;

        if (len < sizeof(*ev))
                return -EINVAL;

        ev = (struct wmi_tx_status_event *) datap;
        id = le32_to_cpu(ev->id);
        ath6kl_dbg(ATH6KL_DBG_WMI, "tx_status: id=%x ack_status=%u\n",
                   id, ev->ack_status);
        if (wmi->last_mgmt_tx_frame) {
                cfg80211_mgmt_tx_status(&vif->wdev, id,
                                        wmi->last_mgmt_tx_frame,
                                        wmi->last_mgmt_tx_frame_len,
                                        !!ev->ack_status, GFP_ATOMIC);
                kfree(wmi->last_mgmt_tx_frame);
                wmi->last_mgmt_tx_frame = NULL;
                wmi->last_mgmt_tx_frame_len = 0;
        }

        return 0;
}

static int ath6kl_wmi_rx_probe_req_event_rx(struct wmi *wmi, u8 *datap, int len,
                                            struct ath6kl_vif *vif)
{
        struct wmi_p2p_rx_probe_req_event *ev;
        u32 freq;
        u16 dlen;

        if (len < sizeof(*ev))
                return -EINVAL;

        ev = (struct wmi_p2p_rx_probe_req_event *) datap;
        freq = le32_to_cpu(ev->freq);
        dlen = le16_to_cpu(ev->len);
        if (datap + len < ev->data + dlen) {
                ath6kl_err("invalid wmi_p2p_rx_probe_req_event: len=%d dlen=%u\n",
                           len, dlen);
                return -EINVAL;
        }
        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "rx_probe_req: len=%u freq=%u probe_req_report=%d\n",
                   dlen, freq, vif->probe_req_report);

        if (vif->probe_req_report || vif->nw_type == AP_NETWORK)
                cfg80211_rx_mgmt(&vif->wdev, freq, 0,
                                 ev->data, dlen, GFP_ATOMIC);

        return 0;
}

static int ath6kl_wmi_p2p_capabilities_event_rx(u8 *datap, int len)
{
        struct wmi_p2p_capabilities_event *ev;
        u16 dlen;

        if (len < sizeof(*ev))
                return -EINVAL;

        ev = (struct wmi_p2p_capabilities_event *) datap;
        dlen = le16_to_cpu(ev->len);
        ath6kl_dbg(ATH6KL_DBG_WMI, "p2p_capab: len=%u\n", dlen);

        return 0;
}

static int ath6kl_wmi_rx_action_event_rx(struct wmi *wmi, u8 *datap, int len,
                                         struct ath6kl_vif *vif)
{
        struct wmi_rx_action_event *ev;
        u32 freq;
        u16 dlen;

        if (len < sizeof(*ev))
                return -EINVAL;

        ev = (struct wmi_rx_action_event *) datap;
        freq = le32_to_cpu(ev->freq);
        dlen = le16_to_cpu(ev->len);
        if (datap + len < ev->data + dlen) {
                ath6kl_err("invalid wmi_rx_action_event: len=%d dlen=%u\n",
                           len, dlen);
                return -EINVAL;
        }
        ath6kl_dbg(ATH6KL_DBG_WMI, "rx_action: len=%u freq=%u\n", dlen, freq);
        cfg80211_rx_mgmt(&vif->wdev, freq, 0,
                         ev->data, dlen, GFP_ATOMIC);

        return 0;
}

static int ath6kl_wmi_p2p_info_event_rx(u8 *datap, int len)
{
        struct wmi_p2p_info_event *ev;
        u32 flags;
        u16 dlen;

        if (len < sizeof(*ev))
                return -EINVAL;

        ev = (struct wmi_p2p_info_event *) datap;
        flags = le32_to_cpu(ev->info_req_flags);
        dlen = le16_to_cpu(ev->len);
        ath6kl_dbg(ATH6KL_DBG_WMI, "p2p_info: flags=%x len=%d\n", flags, dlen);

        if (flags & P2P_FLAG_CAPABILITIES_REQ) {
                struct wmi_p2p_capabilities *cap;
                if (dlen < sizeof(*cap))
                        return -EINVAL;
                cap = (struct wmi_p2p_capabilities *) ev->data;
                ath6kl_dbg(ATH6KL_DBG_WMI, "p2p_info: GO Power Save = %d\n",
                           cap->go_power_save);
        }

        if (flags & P2P_FLAG_MACADDR_REQ) {
                struct wmi_p2p_macaddr *mac;
                if (dlen < sizeof(*mac))
                        return -EINVAL;
                mac = (struct wmi_p2p_macaddr *) ev->data;
                ath6kl_dbg(ATH6KL_DBG_WMI, "p2p_info: MAC Address = %pM\n",
                           mac->mac_addr);
        }

        if (flags & P2P_FLAG_HMODEL_REQ) {
                struct wmi_p2p_hmodel *mod;
                if (dlen < sizeof(*mod))
                        return -EINVAL;
                mod = (struct wmi_p2p_hmodel *) ev->data;
                ath6kl_dbg(ATH6KL_DBG_WMI, "p2p_info: P2P Model = %d (%s)\n",
                           mod->p2p_model,
                           mod->p2p_model ? "host" : "firmware");
        }
        return 0;
}

static inline struct sk_buff *ath6kl_wmi_get_new_buf(u32 size)
{
        struct sk_buff *skb;

        skb = ath6kl_buf_alloc(size);
        if (!skb)
                return NULL;

        skb_put(skb, size);
        if (size)
                memset(skb->data, 0, size);

        return skb;
}

/* Send a "simple" wmi command -- one with no arguments */
static int ath6kl_wmi_simple_cmd(struct wmi *wmi, u8 if_idx,
                                 enum wmi_cmd_id cmd_id)
{
        struct sk_buff *skb;
        int ret;

        skb = ath6kl_wmi_get_new_buf(0);
        if (!skb)
                return -ENOMEM;

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, cmd_id, NO_SYNC_WMIFLAG);

        return ret;
}

static int ath6kl_wmi_ready_event_rx(struct wmi *wmi, u8 *datap, int len)
{
        struct wmi_ready_event_2 *ev = (struct wmi_ready_event_2 *) datap;

        if (len < sizeof(struct wmi_ready_event_2))
                return -EINVAL;

        ath6kl_ready_event(wmi->parent_dev, ev->mac_addr,
                           le32_to_cpu(ev->sw_version),
                           le32_to_cpu(ev->abi_version), ev->phy_cap);

        return 0;
}

/*
 * Mechanism to modify the roaming behavior in the firmware. The lower rssi
 * at which the station has to roam can be passed with
 * WMI_SET_LRSSI_SCAN_PARAMS. Subtract 96 from RSSI to get the signal level
 * in dBm.
 */
int ath6kl_wmi_set_roam_lrssi_cmd(struct wmi *wmi, u8 lrssi)
{
        struct sk_buff *skb;
        struct roam_ctrl_cmd *cmd;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct roam_ctrl_cmd *) skb->data;

        cmd->info.params.lrssi_scan_period = cpu_to_le16(DEF_LRSSI_SCAN_PERIOD);
        cmd->info.params.lrssi_scan_threshold = a_cpu_to_sle16(lrssi +
                                                       DEF_SCAN_FOR_ROAM_INTVL);
        cmd->info.params.lrssi_roam_threshold = a_cpu_to_sle16(lrssi);
        cmd->info.params.roam_rssi_floor = DEF_LRSSI_ROAM_FLOOR;
        cmd->roam_ctrl = WMI_SET_LRSSI_SCAN_PARAMS;

        ath6kl_wmi_cmd_send(wmi, 0, skb, WMI_SET_ROAM_CTRL_CMDID,
                            NO_SYNC_WMIFLAG);

        return 0;
}

int ath6kl_wmi_force_roam_cmd(struct wmi *wmi, const u8 *bssid)
{
        struct sk_buff *skb;
        struct roam_ctrl_cmd *cmd;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct roam_ctrl_cmd *) skb->data;

        memcpy(cmd->info.bssid, bssid, ETH_ALEN);
        cmd->roam_ctrl = WMI_FORCE_ROAM;

        ath6kl_dbg(ATH6KL_DBG_WMI, "force roam to %pM\n", bssid);
        return ath6kl_wmi_cmd_send(wmi, 0, skb, WMI_SET_ROAM_CTRL_CMDID,
                                   NO_SYNC_WMIFLAG);
}

int ath6kl_wmi_ap_set_dtim_cmd(struct wmi *wmi, u8 if_idx, u32 dtim_period)
{
        struct sk_buff *skb;
        struct set_dtim_cmd *cmd;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct set_dtim_cmd *) skb->data;

        cmd->dtim_period = cpu_to_le32(dtim_period);
        return ath6kl_wmi_cmd_send(wmi, if_idx, skb,
                                   WMI_AP_SET_DTIM_CMDID, NO_SYNC_WMIFLAG);
}

int ath6kl_wmi_set_roam_mode_cmd(struct wmi *wmi, enum wmi_roam_mode mode)
{
        struct sk_buff *skb;
        struct roam_ctrl_cmd *cmd;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct roam_ctrl_cmd *) skb->data;

        cmd->info.roam_mode = mode;
        cmd->roam_ctrl = WMI_SET_ROAM_MODE;

        ath6kl_dbg(ATH6KL_DBG_WMI, "set roam mode %d\n", mode);
        return ath6kl_wmi_cmd_send(wmi, 0, skb, WMI_SET_ROAM_CTRL_CMDID,
                                   NO_SYNC_WMIFLAG);
}

static int ath6kl_wmi_connect_event_rx(struct wmi *wmi, u8 *datap, int len,
                                       struct ath6kl_vif *vif)
{
        struct wmi_connect_event *ev;
        u8 *pie, *peie;

        if (len < sizeof(struct wmi_connect_event))
                return -EINVAL;

        ev = (struct wmi_connect_event *) datap;

        if (vif->nw_type == AP_NETWORK) {
                /* AP mode start/STA connected event */
                struct net_device *dev = vif->ndev;
                if (memcmp(dev->dev_addr, ev->u.ap_bss.bssid, ETH_ALEN) == 0) {
                        ath6kl_dbg(ATH6KL_DBG_WMI,
                                   "%s: freq %d bssid %pM (AP started)\n",
                                   __func__, le16_to_cpu(ev->u.ap_bss.ch),
                                   ev->u.ap_bss.bssid);
                        ath6kl_connect_ap_mode_bss(
                                vif, le16_to_cpu(ev->u.ap_bss.ch));
                } else {
                        ath6kl_dbg(ATH6KL_DBG_WMI,
                                   "%s: aid %u mac_addr %pM auth=%u keymgmt=%u cipher=%u apsd_info=%u (STA connected)\n",
                                   __func__, ev->u.ap_sta.aid,
                                   ev->u.ap_sta.mac_addr,
                                   ev->u.ap_sta.auth,
                                   ev->u.ap_sta.keymgmt,
                                   le16_to_cpu(ev->u.ap_sta.cipher),
                                   ev->u.ap_sta.apsd_info);

                        ath6kl_connect_ap_mode_sta(
                                vif, ev->u.ap_sta.aid, ev->u.ap_sta.mac_addr,
                                ev->u.ap_sta.keymgmt,
                                le16_to_cpu(ev->u.ap_sta.cipher),
                                ev->u.ap_sta.auth, ev->assoc_req_len,
                                ev->assoc_info + ev->beacon_ie_len,
                                ev->u.ap_sta.apsd_info);
                }
                return 0;
        }

        /* STA/IBSS mode connection event */

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "wmi event connect freq %d bssid %pM listen_intvl %d beacon_intvl %d type %d\n",
                   le16_to_cpu(ev->u.sta.ch), ev->u.sta.bssid,
                   le16_to_cpu(ev->u.sta.listen_intvl),
                   le16_to_cpu(ev->u.sta.beacon_intvl),
                   le32_to_cpu(ev->u.sta.nw_type));

        /* Start of assoc rsp IEs */
        pie = ev->assoc_info + ev->beacon_ie_len +
              ev->assoc_req_len + (sizeof(u16) * 3); /* capinfo, status, aid */

        /* End of assoc rsp IEs */
        peie = ev->assoc_info + ev->beacon_ie_len + ev->assoc_req_len +
            ev->assoc_resp_len;

        while (pie < peie) {
                switch (*pie) {
                case WLAN_EID_VENDOR_SPECIFIC:
                        if (pie[1] > 3 && pie[2] == 0x00 && pie[3] == 0x50 &&
                            pie[4] == 0xf2 && pie[5] == WMM_OUI_TYPE) {
                                /* WMM OUT (00:50:F2) */
                                if (pie[1] > 5 &&
                                    pie[6] == WMM_PARAM_OUI_SUBTYPE)
                                        wmi->is_wmm_enabled = true;
                        }
                        break;
                }

                if (wmi->is_wmm_enabled)
                        break;

                pie += pie[1] + 2;
        }

        ath6kl_connect_event(vif, le16_to_cpu(ev->u.sta.ch),
                             ev->u.sta.bssid,
                             le16_to_cpu(ev->u.sta.listen_intvl),
                             le16_to_cpu(ev->u.sta.beacon_intvl),
                             le32_to_cpu(ev->u.sta.nw_type),
                             ev->beacon_ie_len, ev->assoc_req_len,
                             ev->assoc_resp_len, ev->assoc_info);

        return 0;
}

static struct country_code_to_enum_rd *
ath6kl_regd_find_country(u16 countryCode)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
                if (allCountries[i].countryCode == countryCode)
                        return &allCountries[i];
        }

        return NULL;
}

static struct reg_dmn_pair_mapping *
ath6kl_get_regpair(u16 regdmn)
{
        int i;

        if (regdmn == NO_ENUMRD)
                return NULL;

        for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
                if (regDomainPairs[i].regDmnEnum == regdmn)
                        return &regDomainPairs[i];
        }

        return NULL;
}

static struct country_code_to_enum_rd *
ath6kl_regd_find_country_by_rd(u16 regdmn)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
                if (allCountries[i].regDmnEnum == regdmn)
                        return &allCountries[i];
        }

        return NULL;
}

static void ath6kl_wmi_regdomain_event(struct wmi *wmi, u8 *datap, int len)
{

        struct ath6kl_wmi_regdomain *ev;
        struct country_code_to_enum_rd *country = NULL;
        struct reg_dmn_pair_mapping *regpair = NULL;
        char alpha2[2];
        u32 reg_code;

        ev = (struct ath6kl_wmi_regdomain *) datap;
        reg_code = le32_to_cpu(ev->reg_code);

        if ((reg_code >> ATH6KL_COUNTRY_RD_SHIFT) & COUNTRY_ERD_FLAG)
                country = ath6kl_regd_find_country((u16) reg_code);
        else if (!(((u16) reg_code & WORLD_SKU_MASK) == WORLD_SKU_PREFIX)) {

                regpair = ath6kl_get_regpair((u16) reg_code);
                country = ath6kl_regd_find_country_by_rd((u16) reg_code);
                ath6kl_dbg(ATH6KL_DBG_WMI, "Regpair used: 0x%0x\n",
                           regpair->regDmnEnum);
        }

        if (country && wmi->parent_dev->wiphy_registered) {
                alpha2[0] = country->isoName[0];
                alpha2[1] = country->isoName[1];

                regulatory_hint(wmi->parent_dev->wiphy, alpha2);

                ath6kl_dbg(ATH6KL_DBG_WMI, "Country alpha2 being used: %c%c\n",
                           alpha2[0], alpha2[1]);
        }
}

static int ath6kl_wmi_disconnect_event_rx(struct wmi *wmi, u8 *datap, int len,
                                          struct ath6kl_vif *vif)
{
        struct wmi_disconnect_event *ev;
        wmi->traffic_class = 100;

        if (len < sizeof(struct wmi_disconnect_event))
                return -EINVAL;

        ev = (struct wmi_disconnect_event *) datap;

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "wmi event disconnect proto_reason %d bssid %pM wmi_reason %d assoc_resp_len %d\n",
                   le16_to_cpu(ev->proto_reason_status), ev->bssid,
                   ev->disconn_reason, ev->assoc_resp_len);

        wmi->is_wmm_enabled = false;

        ath6kl_disconnect_event(vif, ev->disconn_reason,
                                ev->bssid, ev->assoc_resp_len, ev->assoc_info,
                                le16_to_cpu(ev->proto_reason_status));

        return 0;
}

static int ath6kl_wmi_peer_node_event_rx(struct wmi *wmi, u8 *datap, int len)
{
        struct wmi_peer_node_event *ev;

        if (len < sizeof(struct wmi_peer_node_event))
                return -EINVAL;

        ev = (struct wmi_peer_node_event *) datap;

        if (ev->event_code == PEER_NODE_JOIN_EVENT)
                ath6kl_dbg(ATH6KL_DBG_WMI, "joined node with mac addr: %pM\n",
                           ev->peer_mac_addr);
        else if (ev->event_code == PEER_NODE_LEAVE_EVENT)
                ath6kl_dbg(ATH6KL_DBG_WMI, "left node with mac addr: %pM\n",
                           ev->peer_mac_addr);

        return 0;
}

static int ath6kl_wmi_tkip_micerr_event_rx(struct wmi *wmi, u8 *datap, int len,
                                           struct ath6kl_vif *vif)
{

        struct wmi_tkip_micerr_event *ev;

        if (len < sizeof(struct wmi_tkip_micerr_event))
                return -EINVAL;

        ev = (struct wmi_tkip_micerr_event *) datap;

        ath6kl_tkip_micerr_event(vif, ev->key_id, ev->is_mcast);

        return 0;
}

void ath6kl_wmi_sscan_timer(unsigned long ptr)
{
        struct ath6kl_vif *vif = (struct ath6kl_vif *) ptr;

        cfg80211_sched_scan_results(vif->ar->wiphy);
}

static int ath6kl_wmi_bssinfo_event_rx(struct wmi *wmi, u8 *datap, int len,
                                       struct ath6kl_vif *vif)
{
        struct wmi_bss_info_hdr2 *bih;
        u8 *buf;
        struct ieee80211_channel *channel;
        struct ath6kl *ar = wmi->parent_dev;
        struct ieee80211_mgmt *mgmt;
        struct cfg80211_bss *bss;

        if (len <= sizeof(struct wmi_bss_info_hdr2))
                return -EINVAL;

        bih = (struct wmi_bss_info_hdr2 *) datap;
        buf = datap + sizeof(struct wmi_bss_info_hdr2);
        len -= sizeof(struct wmi_bss_info_hdr2);

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "bss info evt - ch %u, snr %d, rssi %d, bssid \"%pM\" "
                   "frame_type=%d\n",
                   bih->ch, bih->snr, bih->snr - 95, bih->bssid,
                   bih->frame_type);

        if (bih->frame_type != BEACON_FTYPE &&
            bih->frame_type != PROBERESP_FTYPE)
                return 0; /* Only update BSS table for now */

        if (bih->frame_type == BEACON_FTYPE &&
            test_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags)) {
                clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
                ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
                                         NONE_BSS_FILTER, 0);
        }

        channel = ieee80211_get_channel(ar->wiphy, le16_to_cpu(bih->ch));
        if (channel == NULL)
                return -EINVAL;

        if (len < 8 + 2 + 2)
                return -EINVAL;

        if (bih->frame_type == BEACON_FTYPE &&
            test_bit(CONNECTED, &vif->flags) &&
            memcmp(bih->bssid, vif->bssid, ETH_ALEN) == 0) {
                const u8 *tim;
                tim = cfg80211_find_ie(WLAN_EID_TIM, buf + 8 + 2 + 2,
                                       len - 8 - 2 - 2);
                if (tim && tim[1] >= 2) {
                        vif->assoc_bss_dtim_period = tim[3];
                        set_bit(DTIM_PERIOD_AVAIL, &vif->flags);
                }
        }

        /*
         * In theory, use of cfg80211_inform_bss() would be more natural here
         * since we do not have the full frame. However, at least for now,
         * cfg80211 can only distinguish Beacon and Probe Response frames from
         * each other when using cfg80211_inform_bss_frame(), so let's build a
         * fake IEEE 802.11 header to be able to take benefit of this.
         */
        mgmt = kmalloc(24 + len, GFP_ATOMIC);
        if (mgmt == NULL)
                return -EINVAL;

        if (bih->frame_type == BEACON_FTYPE) {
                mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
                                                  IEEE80211_STYPE_BEACON);
                memset(mgmt->da, 0xff, ETH_ALEN);
        } else {
                struct net_device *dev = vif->ndev;

                mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
                                                  IEEE80211_STYPE_PROBE_RESP);
                memcpy(mgmt->da, dev->dev_addr, ETH_ALEN);
        }
        mgmt->duration = cpu_to_le16(0);
        memcpy(mgmt->sa, bih->bssid, ETH_ALEN);
        memcpy(mgmt->bssid, bih->bssid, ETH_ALEN);
        mgmt->seq_ctrl = cpu_to_le16(0);

        memcpy(&mgmt->u.beacon, buf, len);

        bss = cfg80211_inform_bss_frame(ar->wiphy, channel, mgmt,
                                        24 + len, (bih->snr - 95) * 100,
                                        GFP_ATOMIC);
        kfree(mgmt);
        if (bss == NULL)
                return -ENOMEM;
        cfg80211_put_bss(bss);

        /*
         * Firmware doesn't return any event when scheduled scan has
         * finished, so we need to use a timer to find out when there are
         * no more results.
         *
         * The timer is started from the first bss info received, otherwise
         * the timer would not ever fire if the scan interval is short
         * enough.
         */
        if (ar->state == ATH6KL_STATE_SCHED_SCAN &&
            !timer_pending(&vif->sched_scan_timer)) {
                mod_timer(&vif->sched_scan_timer, jiffies +
                          msecs_to_jiffies(ATH6KL_SCHED_SCAN_RESULT_DELAY));
        }

        return 0;
}

/* Inactivity timeout of a fatpipe(pstream) at the target */
static int ath6kl_wmi_pstream_timeout_event_rx(struct wmi *wmi, u8 *datap,
                                               int len)
{
        struct wmi_pstream_timeout_event *ev;

        if (len < sizeof(struct wmi_pstream_timeout_event))
                return -EINVAL;

        ev = (struct wmi_pstream_timeout_event *) datap;

        /*
         * When the pstream (fat pipe == AC) timesout, it means there were
         * no thinStreams within this pstream & it got implicitly created
         * due to data flow on this AC. We start the inactivity timer only
         * for implicitly created pstream. Just reset the host state.
         */
        spin_lock_bh(&wmi->lock);
        wmi->stream_exist_for_ac[ev->traffic_class] = 0;
        wmi->fat_pipe_exist &= ~(1 << ev->traffic_class);
        spin_unlock_bh(&wmi->lock);

        /* Indicate inactivity to driver layer for this fatpipe (pstream) */
        ath6kl_indicate_tx_activity(wmi->parent_dev, ev->traffic_class, false);

        return 0;
}

static int ath6kl_wmi_bitrate_reply_rx(struct wmi *wmi, u8 *datap, int len)
{
        struct wmi_bit_rate_reply *reply;
        s32 rate;
        u32 sgi, index;

        if (len < sizeof(struct wmi_bit_rate_reply))
                return -EINVAL;

        reply = (struct wmi_bit_rate_reply *) datap;

        ath6kl_dbg(ATH6KL_DBG_WMI, "rateindex %d\n", reply->rate_index);

        if (reply->rate_index == (s8) RATE_AUTO) {
                rate = RATE_AUTO;
        } else {
                index = reply->rate_index & 0x7f;
                sgi = (reply->rate_index & 0x80) ? 1 : 0;
                rate = wmi_rate_tbl[index][sgi];
        }

        ath6kl_wakeup_event(wmi->parent_dev);

        return 0;
}

static int ath6kl_wmi_test_rx(struct wmi *wmi, u8 *datap, int len)
{
        ath6kl_tm_rx_event(wmi->parent_dev, datap, len);

        return 0;
}

static int ath6kl_wmi_ratemask_reply_rx(struct wmi *wmi, u8 *datap, int len)
{
        if (len < sizeof(struct wmi_fix_rates_reply))
                return -EINVAL;

        ath6kl_wakeup_event(wmi->parent_dev);

        return 0;
}

static int ath6kl_wmi_ch_list_reply_rx(struct wmi *wmi, u8 *datap, int len)
{
        if (len < sizeof(struct wmi_channel_list_reply))
                return -EINVAL;

        ath6kl_wakeup_event(wmi->parent_dev);

        return 0;
}

static int ath6kl_wmi_tx_pwr_reply_rx(struct wmi *wmi, u8 *datap, int len)
{
        struct wmi_tx_pwr_reply *reply;

        if (len < sizeof(struct wmi_tx_pwr_reply))
                return -EINVAL;

        reply = (struct wmi_tx_pwr_reply *) datap;
        ath6kl_txpwr_rx_evt(wmi->parent_dev, reply->dbM);

        return 0;
}

static int ath6kl_wmi_keepalive_reply_rx(struct wmi *wmi, u8 *datap, int len)
{
        if (len < sizeof(struct wmi_get_keepalive_cmd))
                return -EINVAL;

        ath6kl_wakeup_event(wmi->parent_dev);

        return 0;
}

static int ath6kl_wmi_scan_complete_rx(struct wmi *wmi, u8 *datap, int len,
                                       struct ath6kl_vif *vif)
{
        struct wmi_scan_complete_event *ev;

        ev = (struct wmi_scan_complete_event *) datap;

        ath6kl_scan_complete_evt(vif, a_sle32_to_cpu(ev->status));
        wmi->is_probe_ssid = false;

        return 0;
}

static int ath6kl_wmi_neighbor_report_event_rx(struct wmi *wmi, u8 *datap,
                                               int len, struct ath6kl_vif *vif)
{
        struct wmi_neighbor_report_event *ev;
        u8 i;

        if (len < sizeof(*ev))
                return -EINVAL;
        ev = (struct wmi_neighbor_report_event *) datap;
        if (sizeof(*ev) + ev->num_neighbors * sizeof(struct wmi_neighbor_info)
            > len) {
                ath6kl_dbg(ATH6KL_DBG_WMI,
                           "truncated neighbor event (num=%d len=%d)\n",
                           ev->num_neighbors, len);
                return -EINVAL;
        }
        for (i = 0; i < ev->num_neighbors; i++) {
                ath6kl_dbg(ATH6KL_DBG_WMI, "neighbor %d/%d - %pM 0x%x\n",
                           i + 1, ev->num_neighbors, ev->neighbor[i].bssid,
                           ev->neighbor[i].bss_flags);
                cfg80211_pmksa_candidate_notify(vif->ndev, i,
                                                ev->neighbor[i].bssid,
                                                !!(ev->neighbor[i].bss_flags &
                                                   WMI_PREAUTH_CAPABLE_BSS),
                                                GFP_ATOMIC);
        }

        return 0;
}

/*
 * Target is reporting a programming error.  This is for
 * developer aid only.  Target only checks a few common violations
 * and it is responsibility of host to do all error checking.
 * Behavior of target after wmi error event is undefined.
 * A reset is recommended.
 */
static int ath6kl_wmi_error_event_rx(struct wmi *wmi, u8 *datap, int len)
{
        const char *type = "unknown error";
        struct wmi_cmd_error_event *ev;
        ev = (struct wmi_cmd_error_event *) datap;

        switch (ev->err_code) {
        case INVALID_PARAM:
                type = "invalid parameter";
                break;
        case ILLEGAL_STATE:
                type = "invalid state";
                break;
        case INTERNAL_ERROR:
                type = "internal error";
                break;
        }

        ath6kl_dbg(ATH6KL_DBG_WMI, "programming error, cmd=%d %s\n",
                   ev->cmd_id, type);

        return 0;
}

static int ath6kl_wmi_stats_event_rx(struct wmi *wmi, u8 *datap, int len,
                                     struct ath6kl_vif *vif)
{
        ath6kl_tgt_stats_event(vif, datap, len);

        return 0;
}

static u8 ath6kl_wmi_get_upper_threshold(s16 rssi,
                                         struct sq_threshold_params *sq_thresh,
                                         u32 size)
{
        u32 index;
        u8 threshold = (u8) sq_thresh->upper_threshold[size - 1];

        /* The list is already in sorted order. Get the next lower value */
        for (index = 0; index < size; index++) {
                if (rssi < sq_thresh->upper_threshold[index]) {
                        threshold = (u8) sq_thresh->upper_threshold[index];
                        break;
                }
        }

        return threshold;
}

static u8 ath6kl_wmi_get_lower_threshold(s16 rssi,
                                         struct sq_threshold_params *sq_thresh,
                                         u32 size)
{
        u32 index;
        u8 threshold = (u8) sq_thresh->lower_threshold[size - 1];

        /* The list is already in sorted order. Get the next lower value */
        for (index = 0; index < size; index++) {
                if (rssi > sq_thresh->lower_threshold[index]) {
                        threshold = (u8) sq_thresh->lower_threshold[index];
                        break;
                }
        }

        return threshold;
}

static int ath6kl_wmi_send_rssi_threshold_params(struct wmi *wmi,
                        struct wmi_rssi_threshold_params_cmd *rssi_cmd)
{
        struct sk_buff *skb;
        struct wmi_rssi_threshold_params_cmd *cmd;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_rssi_threshold_params_cmd *) skb->data;
        memcpy(cmd, rssi_cmd, sizeof(struct wmi_rssi_threshold_params_cmd));

        return ath6kl_wmi_cmd_send(wmi, 0, skb, WMI_RSSI_THRESHOLD_PARAMS_CMDID,
                                   NO_SYNC_WMIFLAG);
}

static int ath6kl_wmi_rssi_threshold_event_rx(struct wmi *wmi, u8 *datap,
                                              int len)
{
        struct wmi_rssi_threshold_event *reply;
        struct wmi_rssi_threshold_params_cmd cmd;
        struct sq_threshold_params *sq_thresh;
        enum wmi_rssi_threshold_val new_threshold;
        u8 upper_rssi_threshold, lower_rssi_threshold;
        s16 rssi;
        int ret;

        if (len < sizeof(struct wmi_rssi_threshold_event))
                return -EINVAL;

        reply = (struct wmi_rssi_threshold_event *) datap;
        new_threshold = (enum wmi_rssi_threshold_val) reply->range;
        rssi = a_sle16_to_cpu(reply->rssi);

        sq_thresh = &wmi->sq_threshld[SIGNAL_QUALITY_METRICS_RSSI];

        /*
         * Identify the threshold breached and communicate that to the app.
         * After that install a new set of thresholds based on the signal
         * quality reported by the target
         */
        if (new_threshold) {
                /* Upper threshold breached */
                if (rssi < sq_thresh->upper_threshold[0]) {
                        ath6kl_dbg(ATH6KL_DBG_WMI,
                                   "spurious upper rssi threshold event: %d\n",
                                   rssi);
                } else if ((rssi < sq_thresh->upper_threshold[1]) &&
                           (rssi >= sq_thresh->upper_threshold[0])) {
                        new_threshold = WMI_RSSI_THRESHOLD1_ABOVE;
                } else if ((rssi < sq_thresh->upper_threshold[2]) &&
                           (rssi >= sq_thresh->upper_threshold[1])) {
                        new_threshold = WMI_RSSI_THRESHOLD2_ABOVE;
                } else if ((rssi < sq_thresh->upper_threshold[3]) &&
                           (rssi >= sq_thresh->upper_threshold[2])) {
                        new_threshold = WMI_RSSI_THRESHOLD3_ABOVE;
                } else if ((rssi < sq_thresh->upper_threshold[4]) &&
                           (rssi >= sq_thresh->upper_threshold[3])) {
                        new_threshold = WMI_RSSI_THRESHOLD4_ABOVE;
                } else if ((rssi < sq_thresh->upper_threshold[5]) &&
                           (rssi >= sq_thresh->upper_threshold[4])) {
                        new_threshold = WMI_RSSI_THRESHOLD5_ABOVE;
                } else if (rssi >= sq_thresh->upper_threshold[5]) {
                        new_threshold = WMI_RSSI_THRESHOLD6_ABOVE;
                }
        } else {
                /* Lower threshold breached */
                if (rssi > sq_thresh->lower_threshold[0]) {
                        ath6kl_dbg(ATH6KL_DBG_WMI,
                                   "spurious lower rssi threshold event: %d %d\n",
                                rssi, sq_thresh->lower_threshold[0]);
                } else if ((rssi > sq_thresh->lower_threshold[1]) &&
                           (rssi <= sq_thresh->lower_threshold[0])) {
                        new_threshold = WMI_RSSI_THRESHOLD6_BELOW;
                } else if ((rssi > sq_thresh->lower_threshold[2]) &&
                           (rssi <= sq_thresh->lower_threshold[1])) {
                        new_threshold = WMI_RSSI_THRESHOLD5_BELOW;
                } else if ((rssi > sq_thresh->lower_threshold[3]) &&
                           (rssi <= sq_thresh->lower_threshold[2])) {
                        new_threshold = WMI_RSSI_THRESHOLD4_BELOW;
                } else if ((rssi > sq_thresh->lower_threshold[4]) &&
                           (rssi <= sq_thresh->lower_threshold[3])) {
                        new_threshold = WMI_RSSI_THRESHOLD3_BELOW;
                } else if ((rssi > sq_thresh->lower_threshold[5]) &&
                           (rssi <= sq_thresh->lower_threshold[4])) {
                        new_threshold = WMI_RSSI_THRESHOLD2_BELOW;
                } else if (rssi <= sq_thresh->lower_threshold[5]) {
                        new_threshold = WMI_RSSI_THRESHOLD1_BELOW;
                }
        }

        /* Calculate and install the next set of thresholds */
        lower_rssi_threshold = ath6kl_wmi_get_lower_threshold(rssi, sq_thresh,
                                       sq_thresh->lower_threshold_valid_count);
        upper_rssi_threshold = ath6kl_wmi_get_upper_threshold(rssi, sq_thresh,
                                       sq_thresh->upper_threshold_valid_count);

        /* Issue a wmi command to install the thresholds */
        cmd.thresh_above1_val = a_cpu_to_sle16(upper_rssi_threshold);
        cmd.thresh_below1_val = a_cpu_to_sle16(lower_rssi_threshold);
        cmd.weight = sq_thresh->weight;
        cmd.poll_time = cpu_to_le32(sq_thresh->polling_interval);

        ret = ath6kl_wmi_send_rssi_threshold_params(wmi, &cmd);
        if (ret) {
                ath6kl_err("unable to configure rssi thresholds\n");
                return -EIO;
        }

        return 0;
}

static int ath6kl_wmi_cac_event_rx(struct wmi *wmi, u8 *datap, int len,
                                   struct ath6kl_vif *vif)
{
        struct wmi_cac_event *reply;
        struct ieee80211_tspec_ie *ts;
        u16 active_tsids, tsinfo;
        u8 tsid, index;
        u8 ts_id;

        if (len < sizeof(struct wmi_cac_event))
                return -EINVAL;

        reply = (struct wmi_cac_event *) datap;

        if ((reply->cac_indication == CAC_INDICATION_ADMISSION_RESP) &&
            (reply->status_code != IEEE80211_TSPEC_STATUS_ADMISS_ACCEPTED)) {

                ts = (struct ieee80211_tspec_ie *) &(reply->tspec_suggestion);
                tsinfo = le16_to_cpu(ts->tsinfo);
                tsid = (tsinfo >> IEEE80211_WMM_IE_TSPEC_TID_SHIFT) &
                        IEEE80211_WMM_IE_TSPEC_TID_MASK;

                ath6kl_wmi_delete_pstream_cmd(wmi, vif->fw_vif_idx,
                                              reply->ac, tsid);
        } else if (reply->cac_indication == CAC_INDICATION_NO_RESP) {
                /*
                 * Following assumes that there is only one outstanding
                 * ADDTS request when this event is received
                 */
                spin_lock_bh(&wmi->lock);
                active_tsids = wmi->stream_exist_for_ac[reply->ac];
                spin_unlock_bh(&wmi->lock);

                for (index = 0; index < sizeof(active_tsids) * 8; index++) {
                        if ((active_tsids >> index) & 1)
                                break;
                }
                if (index < (sizeof(active_tsids) * 8))
                        ath6kl_wmi_delete_pstream_cmd(wmi, vif->fw_vif_idx,
                                                      reply->ac, index);
        }

        /*
         * Clear active tsids and Add missing handling
         * for delete qos stream from AP
         */
        else if (reply->cac_indication == CAC_INDICATION_DELETE) {

                ts = (struct ieee80211_tspec_ie *) &(reply->tspec_suggestion);
                tsinfo = le16_to_cpu(ts->tsinfo);
                ts_id = ((tsinfo >> IEEE80211_WMM_IE_TSPEC_TID_SHIFT) &
                         IEEE80211_WMM_IE_TSPEC_TID_MASK);

                spin_lock_bh(&wmi->lock);
                wmi->stream_exist_for_ac[reply->ac] &= ~(1 << ts_id);
                active_tsids = wmi->stream_exist_for_ac[reply->ac];
                spin_unlock_bh(&wmi->lock);

                /* Indicate stream inactivity to driver layer only if all tsids
                 * within this AC are deleted.
                 */
                if (!active_tsids) {
                        ath6kl_indicate_tx_activity(wmi->parent_dev, reply->ac,
                                                    false);
                        wmi->fat_pipe_exist &= ~(1 << reply->ac);
                }
        }

        return 0;
}

static int ath6kl_wmi_send_snr_threshold_params(struct wmi *wmi,
                        struct wmi_snr_threshold_params_cmd *snr_cmd)
{
        struct sk_buff *skb;
        struct wmi_snr_threshold_params_cmd *cmd;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_snr_threshold_params_cmd *) skb->data;
        memcpy(cmd, snr_cmd, sizeof(struct wmi_snr_threshold_params_cmd));

        return ath6kl_wmi_cmd_send(wmi, 0, skb, WMI_SNR_THRESHOLD_PARAMS_CMDID,
                                   NO_SYNC_WMIFLAG);
}

static int ath6kl_wmi_snr_threshold_event_rx(struct wmi *wmi, u8 *datap,
                                             int len)
{
        struct wmi_snr_threshold_event *reply;
        struct sq_threshold_params *sq_thresh;
        struct wmi_snr_threshold_params_cmd cmd;
        enum wmi_snr_threshold_val new_threshold;
        u8 upper_snr_threshold, lower_snr_threshold;
        s16 snr;
        int ret;

        if (len < sizeof(struct wmi_snr_threshold_event))
                return -EINVAL;

        reply = (struct wmi_snr_threshold_event *) datap;

        new_threshold = (enum wmi_snr_threshold_val) reply->range;
        snr = reply->snr;

        sq_thresh = &wmi->sq_threshld[SIGNAL_QUALITY_METRICS_SNR];

        /*
         * Identify the threshold breached and communicate that to the app.
         * After that install a new set of thresholds based on the signal
         * quality reported by the target.
         */
        if (new_threshold) {
                /* Upper threshold breached */
                if (snr < sq_thresh->upper_threshold[0]) {
                        ath6kl_dbg(ATH6KL_DBG_WMI,
                                   "spurious upper snr threshold event: %d\n",
                                   snr);
                } else if ((snr < sq_thresh->upper_threshold[1]) &&
                           (snr >= sq_thresh->upper_threshold[0])) {
                        new_threshold = WMI_SNR_THRESHOLD1_ABOVE;
                } else if ((snr < sq_thresh->upper_threshold[2]) &&
                           (snr >= sq_thresh->upper_threshold[1])) {
                        new_threshold = WMI_SNR_THRESHOLD2_ABOVE;
                } else if ((snr < sq_thresh->upper_threshold[3]) &&
                           (snr >= sq_thresh->upper_threshold[2])) {
                        new_threshold = WMI_SNR_THRESHOLD3_ABOVE;
                } else if (snr >= sq_thresh->upper_threshold[3]) {
                        new_threshold = WMI_SNR_THRESHOLD4_ABOVE;
                }
        } else {
                /* Lower threshold breached */
                if (snr > sq_thresh->lower_threshold[0]) {
                        ath6kl_dbg(ATH6KL_DBG_WMI,
                                   "spurious lower snr threshold event: %d\n",
                                   sq_thresh->lower_threshold[0]);
                } else if ((snr > sq_thresh->lower_threshold[1]) &&
                           (snr <= sq_thresh->lower_threshold[0])) {
                        new_threshold = WMI_SNR_THRESHOLD4_BELOW;
                } else if ((snr > sq_thresh->lower_threshold[2]) &&
                           (snr <= sq_thresh->lower_threshold[1])) {
                        new_threshold = WMI_SNR_THRESHOLD3_BELOW;
                } else if ((snr > sq_thresh->lower_threshold[3]) &&
                           (snr <= sq_thresh->lower_threshold[2])) {
                        new_threshold = WMI_SNR_THRESHOLD2_BELOW;
                } else if (snr <= sq_thresh->lower_threshold[3]) {
                        new_threshold = WMI_SNR_THRESHOLD1_BELOW;
                }
        }

        /* Calculate and install the next set of thresholds */
        lower_snr_threshold = ath6kl_wmi_get_lower_threshold(snr, sq_thresh,
                                       sq_thresh->lower_threshold_valid_count);
        upper_snr_threshold = ath6kl_wmi_get_upper_threshold(snr, sq_thresh,
                                       sq_thresh->upper_threshold_valid_count);

        /* Issue a wmi command to install the thresholds */
        cmd.thresh_above1_val = upper_snr_threshold;
        cmd.thresh_below1_val = lower_snr_threshold;
        cmd.weight = sq_thresh->weight;
        cmd.poll_time = cpu_to_le32(sq_thresh->polling_interval);

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "snr: %d, threshold: %d, lower: %d, upper: %d\n",
                   snr, new_threshold,
                   lower_snr_threshold, upper_snr_threshold);

        ret = ath6kl_wmi_send_snr_threshold_params(wmi, &cmd);
        if (ret) {
                ath6kl_err("unable to configure snr threshold\n");
                return -EIO;
        }

        return 0;
}

static int ath6kl_wmi_aplist_event_rx(struct wmi *wmi, u8 *datap, int len)
{
        u16 ap_info_entry_size;
        struct wmi_aplist_event *ev = (struct wmi_aplist_event *) datap;
        struct wmi_ap_info_v1 *ap_info_v1;
        u8 index;

        if (len < sizeof(struct wmi_aplist_event) ||
            ev->ap_list_ver != APLIST_VER1)
                return -EINVAL;

        ap_info_entry_size = sizeof(struct wmi_ap_info_v1);
        ap_info_v1 = (struct wmi_ap_info_v1 *) ev->ap_list;

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "number of APs in aplist event: %d\n", ev->num_ap);

        if (len < (int) (sizeof(struct wmi_aplist_event) +
                         (ev->num_ap - 1) * ap_info_entry_size))
                return -EINVAL;

        /* AP list version 1 contents */
        for (index = 0; index < ev->num_ap; index++) {
                ath6kl_dbg(ATH6KL_DBG_WMI, "AP#%d BSSID %pM Channel %d\n",
                           index, ap_info_v1->bssid, ap_info_v1->channel);
                ap_info_v1++;
        }

        return 0;
}

int ath6kl_wmi_cmd_send(struct wmi *wmi, u8 if_idx, struct sk_buff *skb,
                        enum wmi_cmd_id cmd_id, enum wmi_sync_flag sync_flag)
{
        struct wmi_cmd_hdr *cmd_hdr;
        enum htc_endpoint_id ep_id = wmi->ep_id;
        int ret;
        u16 info1;

        if (WARN_ON(skb == NULL || (if_idx > (wmi->parent_dev->vif_max - 1))))
                return -EINVAL;

        ath6kl_dbg(ATH6KL_DBG_WMI, "wmi tx id %d len %d flag %d\n",
                   cmd_id, skb->len, sync_flag);
        ath6kl_dbg_dump(ATH6KL_DBG_WMI_DUMP, NULL, "wmi tx ",
                        skb->data, skb->len);

        if (sync_flag >= END_WMIFLAG) {
                dev_kfree_skb(skb);
                return -EINVAL;
        }

        if ((sync_flag == SYNC_BEFORE_WMIFLAG) ||
            (sync_flag == SYNC_BOTH_WMIFLAG)) {
                /*
                 * Make sure all data currently queued is transmitted before
                 * the cmd execution.  Establish a new sync point.
                 */
                ath6kl_wmi_sync_point(wmi, if_idx);
        }

        skb_push(skb, sizeof(struct wmi_cmd_hdr));

        cmd_hdr = (struct wmi_cmd_hdr *) skb->data;
        cmd_hdr->cmd_id = cpu_to_le16(cmd_id);
        info1 = if_idx & WMI_CMD_HDR_IF_ID_MASK;
        cmd_hdr->info1 = cpu_to_le16(info1);

        /* Only for OPT_TX_CMD, use BE endpoint. */
        if (cmd_id == WMI_OPT_TX_FRAME_CMDID) {
                ret = ath6kl_wmi_data_hdr_add(wmi, skb, OPT_MSGTYPE,
                                              false, false, 0, NULL, if_idx);
                if (ret) {
                        dev_kfree_skb(skb);
                        return ret;
                }
                ep_id = ath6kl_ac2_endpoint_id(wmi->parent_dev, WMM_AC_BE);
        }

        ath6kl_control_tx(wmi->parent_dev, skb, ep_id);

        if ((sync_flag == SYNC_AFTER_WMIFLAG) ||
            (sync_flag == SYNC_BOTH_WMIFLAG)) {
                /*
                 * Make sure all new data queued waits for the command to
                 * execute. Establish a new sync point.
                 */
                ath6kl_wmi_sync_point(wmi, if_idx);
        }

        return 0;
}

int ath6kl_wmi_connect_cmd(struct wmi *wmi, u8 if_idx,
                           enum network_type nw_type,
                           enum dot11_auth_mode dot11_auth_mode,
                           enum auth_mode auth_mode,
                           enum crypto_type pairwise_crypto,
                           u8 pairwise_crypto_len,
                           enum crypto_type group_crypto,
                           u8 group_crypto_len, int ssid_len, u8 *ssid,
                           u8 *bssid, u16 channel, u32 ctrl_flags,
                           u8 nw_subtype)
{
        struct sk_buff *skb;
        struct wmi_connect_cmd *cc;
        int ret;

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "wmi connect bssid %pM freq %d flags 0x%x ssid_len %d "
                   "type %d dot11_auth %d auth %d pairwise %d group %d\n",
                   bssid, channel, ctrl_flags, ssid_len, nw_type,
                   dot11_auth_mode, auth_mode, pairwise_crypto, group_crypto);
        ath6kl_dbg_dump(ATH6KL_DBG_WMI, NULL, "ssid ", ssid, ssid_len);

        wmi->traffic_class = 100;

        if ((pairwise_crypto == NONE_CRYPT) && (group_crypto != NONE_CRYPT))
                return -EINVAL;

        if ((pairwise_crypto != NONE_CRYPT) && (group_crypto == NONE_CRYPT))
                return -EINVAL;

        skb = ath6kl_wmi_get_new_buf(sizeof(struct wmi_connect_cmd));
        if (!skb)
                return -ENOMEM;

        cc = (struct wmi_connect_cmd *) skb->data;

        if (ssid_len)
                memcpy(cc->ssid, ssid, ssid_len);

        cc->ssid_len = ssid_len;
        cc->nw_type = nw_type;
        cc->dot11_auth_mode = dot11_auth_mode;
        cc->auth_mode = auth_mode;
        cc->prwise_crypto_type = pairwise_crypto;
        cc->prwise_crypto_len = pairwise_crypto_len;
        cc->grp_crypto_type = group_crypto;
        cc->grp_crypto_len = group_crypto_len;
        cc->ch = cpu_to_le16(channel);
        cc->ctrl_flags = cpu_to_le32(ctrl_flags);
        cc->nw_subtype = nw_subtype;

        if (bssid != NULL)
                memcpy(cc->bssid, bssid, ETH_ALEN);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_CONNECT_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

int ath6kl_wmi_reconnect_cmd(struct wmi *wmi, u8 if_idx, u8 *bssid,
                             u16 channel)
{
        struct sk_buff *skb;
        struct wmi_reconnect_cmd *cc;
        int ret;

        ath6kl_dbg(ATH6KL_DBG_WMI, "wmi reconnect bssid %pM freq %d\n",
                   bssid, channel);

        wmi->traffic_class = 100;

        skb = ath6kl_wmi_get_new_buf(sizeof(struct wmi_reconnect_cmd));
        if (!skb)
                return -ENOMEM;

        cc = (struct wmi_reconnect_cmd *) skb->data;
        cc->channel = cpu_to_le16(channel);

        if (bssid != NULL)
                memcpy(cc->bssid, bssid, ETH_ALEN);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_RECONNECT_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

int ath6kl_wmi_disconnect_cmd(struct wmi *wmi, u8 if_idx)
{
        int ret;

        ath6kl_dbg(ATH6KL_DBG_WMI, "wmi disconnect\n");

        wmi->traffic_class = 100;

        /* Disconnect command does not need to do a SYNC before. */
        ret = ath6kl_wmi_simple_cmd(wmi, if_idx, WMI_DISCONNECT_CMDID);

        return ret;
}

int ath6kl_wmi_beginscan_cmd(struct wmi *wmi, u8 if_idx,
                             enum wmi_scan_type scan_type,
                             u32 force_fgscan, u32 is_legacy,
                             u32 home_dwell_time, u32 force_scan_interval,
                             s8 num_chan, u16 *ch_list, u32 no_cck, u32 *rates)
{
        struct ieee80211_supported_band *sband;
        struct sk_buff *skb;
        struct wmi_begin_scan_cmd *sc;
        s8 size, *supp_rates;
        int i, band, ret;
        struct ath6kl *ar = wmi->parent_dev;
        int num_rates;
        u32 ratemask;

        size = sizeof(struct wmi_begin_scan_cmd);

        if ((scan_type != WMI_LONG_SCAN) && (scan_type != WMI_SHORT_SCAN))
                return -EINVAL;

        if (num_chan > WMI_MAX_CHANNELS)
                return -EINVAL;

        if (num_chan)
                size += sizeof(u16) * (num_chan - 1);

        skb = ath6kl_wmi_get_new_buf(size);
        if (!skb)
                return -ENOMEM;

        sc = (struct wmi_begin_scan_cmd *) skb->data;
        sc->scan_type = scan_type;
        sc->force_fg_scan = cpu_to_le32(force_fgscan);
        sc->is_legacy = cpu_to_le32(is_legacy);
        sc->home_dwell_time = cpu_to_le32(home_dwell_time);
        sc->force_scan_intvl = cpu_to_le32(force_scan_interval);
        sc->no_cck = cpu_to_le32(no_cck);
        sc->num_ch = num_chan;

        for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
                sband = ar->wiphy->bands[band];

                if (!sband)
                        continue;

                ratemask = rates[band];
                supp_rates = sc->supp_rates[band].rates;
                num_rates = 0;

                for (i = 0; i < sband->n_bitrates; i++) {
                        if ((BIT(i) & ratemask) == 0)
                                continue; /* skip rate */
                        supp_rates[num_rates++] =
                            (u8) (sband->bitrates[i].bitrate / 5);
                }
                sc->supp_rates[band].nrates = num_rates;
        }

        for (i = 0; i < num_chan; i++)
                sc->ch_list[i] = cpu_to_le16(ch_list[i]);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_BEGIN_SCAN_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

/* ath6kl_wmi_start_scan_cmd is to be deprecated. Use
 * ath6kl_wmi_begin_scan_cmd instead. The new function supports P2P
 * mgmt operations using station interface.
 */
int ath6kl_wmi_startscan_cmd(struct wmi *wmi, u8 if_idx,
                             enum wmi_scan_type scan_type,
                             u32 force_fgscan, u32 is_legacy,
                             u32 home_dwell_time, u32 force_scan_interval,
                             s8 num_chan, u16 *ch_list)
{
        struct sk_buff *skb;
        struct wmi_start_scan_cmd *sc;
        s8 size;
        int i, ret;

        size = sizeof(struct wmi_start_scan_cmd);

        if ((scan_type != WMI_LONG_SCAN) && (scan_type != WMI_SHORT_SCAN))
                return -EINVAL;

        if (num_chan > WMI_MAX_CHANNELS)
                return -EINVAL;

        if (num_chan)
                size += sizeof(u16) * (num_chan - 1);

        skb = ath6kl_wmi_get_new_buf(size);
        if (!skb)
                return -ENOMEM;

        sc = (struct wmi_start_scan_cmd *) skb->data;
        sc->scan_type = scan_type;
        sc->force_fg_scan = cpu_to_le32(force_fgscan);
        sc->is_legacy = cpu_to_le32(is_legacy);
        sc->home_dwell_time = cpu_to_le32(home_dwell_time);
        sc->force_scan_intvl = cpu_to_le32(force_scan_interval);
        sc->num_ch = num_chan;

        for (i = 0; i < num_chan; i++)
                sc->ch_list[i] = cpu_to_le16(ch_list[i]);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_START_SCAN_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

int ath6kl_wmi_scanparams_cmd(struct wmi *wmi, u8 if_idx,
                              u16 fg_start_sec,
                              u16 fg_end_sec, u16 bg_sec,
                              u16 minact_chdw_msec, u16 maxact_chdw_msec,
                              u16 pas_chdw_msec, u8 short_scan_ratio,
                              u8 scan_ctrl_flag, u32 max_dfsch_act_time,
                              u16 maxact_scan_per_ssid)
{
        struct sk_buff *skb;
        struct wmi_scan_params_cmd *sc;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*sc));
        if (!skb)
                return -ENOMEM;

        sc = (struct wmi_scan_params_cmd *) skb->data;
        sc->fg_start_period = cpu_to_le16(fg_start_sec);
        sc->fg_end_period = cpu_to_le16(fg_end_sec);
        sc->bg_period = cpu_to_le16(bg_sec);
        sc->minact_chdwell_time = cpu_to_le16(minact_chdw_msec);
        sc->maxact_chdwell_time = cpu_to_le16(maxact_chdw_msec);
        sc->pas_chdwell_time = cpu_to_le16(pas_chdw_msec);
        sc->short_scan_ratio = short_scan_ratio;
        sc->scan_ctrl_flags = scan_ctrl_flag;
        sc->max_dfsch_act_time = cpu_to_le32(max_dfsch_act_time);
        sc->maxact_scan_per_ssid = cpu_to_le16(maxact_scan_per_ssid);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_SCAN_PARAMS_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_bssfilter_cmd(struct wmi *wmi, u8 if_idx, u8 filter, u32 ie_mask)
{
        struct sk_buff *skb;
        struct wmi_bss_filter_cmd *cmd;
        int ret;

        if (filter >= LAST_BSS_FILTER)
                return -EINVAL;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_bss_filter_cmd *) skb->data;
        cmd->bss_filter = filter;
        cmd->ie_mask = cpu_to_le32(ie_mask);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_BSS_FILTER_CMDID,

                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_probedssid_cmd(struct wmi *wmi, u8 if_idx, u8 index, u8 flag,
                              u8 ssid_len, u8 *ssid)
{
        struct sk_buff *skb;
        struct wmi_probed_ssid_cmd *cmd;
        int ret;

        if (index >= MAX_PROBED_SSIDS)
                return -EINVAL;

        if (ssid_len > sizeof(cmd->ssid))
                return -EINVAL;

        if ((flag & (DISABLE_SSID_FLAG | ANY_SSID_FLAG)) && (ssid_len > 0))
                return -EINVAL;

        if ((flag & SPECIFIC_SSID_FLAG) && !ssid_len)
                return -EINVAL;

        if (flag & SPECIFIC_SSID_FLAG)
                wmi->is_probe_ssid = true;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_probed_ssid_cmd *) skb->data;
        cmd->entry_index = index;
        cmd->flag = flag;
        cmd->ssid_len = ssid_len;
        memcpy(cmd->ssid, ssid, ssid_len);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_PROBED_SSID_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_listeninterval_cmd(struct wmi *wmi, u8 if_idx,
                                  u16 listen_interval,
                                  u16 listen_beacons)
{
        struct sk_buff *skb;
        struct wmi_listen_int_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_listen_int_cmd *) skb->data;
        cmd->listen_intvl = cpu_to_le16(listen_interval);
        cmd->num_beacons = cpu_to_le16(listen_beacons);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_LISTEN_INT_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_bmisstime_cmd(struct wmi *wmi, u8 if_idx,
                             u16 bmiss_time, u16 num_beacons)
{
        struct sk_buff *skb;
        struct wmi_bmiss_time_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_bmiss_time_cmd *) skb->data;
        cmd->bmiss_time = cpu_to_le16(bmiss_time);
        cmd->num_beacons = cpu_to_le16(num_beacons);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_BMISS_TIME_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_powermode_cmd(struct wmi *wmi, u8 if_idx, u8 pwr_mode)
{
        struct sk_buff *skb;
        struct wmi_power_mode_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_power_mode_cmd *) skb->data;
        cmd->pwr_mode = pwr_mode;
        wmi->pwr_mode = pwr_mode;

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_POWER_MODE_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_pmparams_cmd(struct wmi *wmi, u8 if_idx, u16 idle_period,
                            u16 ps_poll_num, u16 dtim_policy,
                            u16 tx_wakeup_policy, u16 num_tx_to_wakeup,
                            u16 ps_fail_event_policy)
{
        struct sk_buff *skb;
        struct wmi_power_params_cmd *pm;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*pm));
        if (!skb)
                return -ENOMEM;

        pm = (struct wmi_power_params_cmd *)skb->data;
        pm->idle_period = cpu_to_le16(idle_period);
        pm->pspoll_number = cpu_to_le16(ps_poll_num);
        pm->dtim_policy = cpu_to_le16(dtim_policy);
        pm->tx_wakeup_policy = cpu_to_le16(tx_wakeup_policy);
        pm->num_tx_to_wakeup = cpu_to_le16(num_tx_to_wakeup);
        pm->ps_fail_event_policy = cpu_to_le16(ps_fail_event_policy);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_POWER_PARAMS_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_disctimeout_cmd(struct wmi *wmi, u8 if_idx, u8 timeout)
{
        struct sk_buff *skb;
        struct wmi_disc_timeout_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_disc_timeout_cmd *) skb->data;
        cmd->discon_timeout = timeout;

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_DISC_TIMEOUT_CMDID,
                                  NO_SYNC_WMIFLAG);

        if (ret == 0)
                ath6kl_debug_set_disconnect_timeout(wmi->parent_dev, timeout);

        return ret;
}

int ath6kl_wmi_addkey_cmd(struct wmi *wmi, u8 if_idx, u8 key_index,
                          enum crypto_type key_type,
                          u8 key_usage, u8 key_len,
                          u8 *key_rsc, unsigned int key_rsc_len,
                          u8 *key_material,
                          u8 key_op_ctrl, u8 *mac_addr,
                          enum wmi_sync_flag sync_flag)
{
        struct sk_buff *skb;
        struct wmi_add_cipher_key_cmd *cmd;
        int ret;

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "addkey cmd: key_index=%u key_type=%d key_usage=%d key_len=%d key_op_ctrl=%d\n",
                   key_index, key_type, key_usage, key_len, key_op_ctrl);

        if ((key_index > WMI_MAX_KEY_INDEX) || (key_len > WMI_MAX_KEY_LEN) ||
            (key_material == NULL) || key_rsc_len > 8)
                return -EINVAL;

        if ((WEP_CRYPT != key_type) && (NULL == key_rsc))
                return -EINVAL;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_add_cipher_key_cmd *) skb->data;
        cmd->key_index = key_index;
        cmd->key_type = key_type;
        cmd->key_usage = key_usage;
        cmd->key_len = key_len;
        memcpy(cmd->key, key_material, key_len);

        if (key_rsc != NULL)
                memcpy(cmd->key_rsc, key_rsc, key_rsc_len);

        cmd->key_op_ctrl = key_op_ctrl;

        if (mac_addr)
                memcpy(cmd->key_mac_addr, mac_addr, ETH_ALEN);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_ADD_CIPHER_KEY_CMDID,
                                  sync_flag);

        return ret;
}

int ath6kl_wmi_add_krk_cmd(struct wmi *wmi, u8 if_idx, u8 *krk)
{
        struct sk_buff *skb;
        struct wmi_add_krk_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_add_krk_cmd *) skb->data;
        memcpy(cmd->krk, krk, WMI_KRK_LEN);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_ADD_KRK_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

int ath6kl_wmi_deletekey_cmd(struct wmi *wmi, u8 if_idx, u8 key_index)
{
        struct sk_buff *skb;
        struct wmi_delete_cipher_key_cmd *cmd;
        int ret;

        if (key_index > WMI_MAX_KEY_INDEX)
                return -EINVAL;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_delete_cipher_key_cmd *) skb->data;
        cmd->key_index = key_index;

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_DELETE_CIPHER_KEY_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

int ath6kl_wmi_setpmkid_cmd(struct wmi *wmi, u8 if_idx, const u8 *bssid,
                            const u8 *pmkid, bool set)
{
        struct sk_buff *skb;
        struct wmi_setpmkid_cmd *cmd;
        int ret;

        if (bssid == NULL)
                return -EINVAL;

        if (set && pmkid == NULL)
                return -EINVAL;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_setpmkid_cmd *) skb->data;
        memcpy(cmd->bssid, bssid, ETH_ALEN);
        if (set) {
                memcpy(cmd->pmkid, pmkid, sizeof(cmd->pmkid));
                cmd->enable = PMKID_ENABLE;
        } else {
                memset(cmd->pmkid, 0, sizeof(cmd->pmkid));
                cmd->enable = PMKID_DISABLE;
        }

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_PMKID_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

static int ath6kl_wmi_data_sync_send(struct wmi *wmi, struct sk_buff *skb,
                              enum htc_endpoint_id ep_id, u8 if_idx)
{
        struct wmi_data_hdr *data_hdr;
        int ret;

        if (WARN_ON(skb == NULL || ep_id == wmi->ep_id))
                return -EINVAL;

        skb_push(skb, sizeof(struct wmi_data_hdr));

        data_hdr = (struct wmi_data_hdr *) skb->data;
        data_hdr->info = SYNC_MSGTYPE << WMI_DATA_HDR_MSG_TYPE_SHIFT;
        data_hdr->info3 = cpu_to_le16(if_idx & WMI_DATA_HDR_IF_IDX_MASK);

        ret = ath6kl_control_tx(wmi->parent_dev, skb, ep_id);

        return ret;
}

static int ath6kl_wmi_sync_point(struct wmi *wmi, u8 if_idx)
{
        struct sk_buff *skb;
        struct wmi_sync_cmd *cmd;
        struct wmi_data_sync_bufs data_sync_bufs[WMM_NUM_AC];
        enum htc_endpoint_id ep_id;
        u8 index, num_pri_streams = 0;
        int ret = 0;

        memset(data_sync_bufs, 0, sizeof(data_sync_bufs));

        spin_lock_bh(&wmi->lock);

        for (index = 0; index < WMM_NUM_AC; index++) {
                if (wmi->fat_pipe_exist & (1 << index)) {
                        num_pri_streams++;
                        data_sync_bufs[num_pri_streams - 1].traffic_class =
                            index;
                }
        }

        spin_unlock_bh(&wmi->lock);

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb) {
                ret = -ENOMEM;
                goto free_skb;
        }

        cmd = (struct wmi_sync_cmd *) skb->data;

        /*
         * In the SYNC cmd sent on the control Ep, send a bitmap
         * of the data eps on which the Data Sync will be sent
         */
        cmd->data_sync_map = wmi->fat_pipe_exist;

        for (index = 0; index < num_pri_streams; index++) {
                data_sync_bufs[index].skb = ath6kl_buf_alloc(0);
                if (data_sync_bufs[index].skb == NULL) {
                        ret = -ENOMEM;
                        break;
                }
        }

        /*
         * If buffer allocation for any of the dataSync fails,
         * then do not send the Synchronize cmd on the control ep
         */
        if (ret)
                goto free_skb;

        /*
         * Send sync cmd followed by sync data messages on all
         * endpoints being used
         */
        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SYNCHRONIZE_CMDID,
                                  NO_SYNC_WMIFLAG);

        if (ret)
                goto free_skb;

        /* cmd buffer sent, we no longer own it */
        skb = NULL;

        for (index = 0; index < num_pri_streams; index++) {

                if (WARN_ON(!data_sync_bufs[index].skb))
                        break;

                ep_id = ath6kl_ac2_endpoint_id(wmi->parent_dev,
                                               data_sync_bufs[index].
                                               traffic_class);
                ret =
                    ath6kl_wmi_data_sync_send(wmi, data_sync_bufs[index].skb,
                                              ep_id, if_idx);

                if (ret)
                        break;

                data_sync_bufs[index].skb = NULL;
        }

free_skb:
        /* free up any resources left over (possibly due to an error) */
        if (skb)
                dev_kfree_skb(skb);

        for (index = 0; index < num_pri_streams; index++) {
                if (data_sync_bufs[index].skb != NULL) {
                        dev_kfree_skb((struct sk_buff *)data_sync_bufs[index].
                                      skb);
                }
        }

        return ret;
}

int ath6kl_wmi_create_pstream_cmd(struct wmi *wmi, u8 if_idx,
                                  struct wmi_create_pstream_cmd *params)
{
        struct sk_buff *skb;
        struct wmi_create_pstream_cmd *cmd;
        u8 fatpipe_exist_for_ac = 0;
        s32 min_phy = 0;
        s32 nominal_phy = 0;
        int ret;

        if (!((params->user_pri < 8) &&
              (params->user_pri <= 0x7) &&
              (up_to_ac[params->user_pri & 0x7] == params->traffic_class) &&
              (params->traffic_direc == UPLINK_TRAFFIC ||
               params->traffic_direc == DNLINK_TRAFFIC ||
               params->traffic_direc == BIDIR_TRAFFIC) &&
              (params->traffic_type == TRAFFIC_TYPE_APERIODIC ||
               params->traffic_type == TRAFFIC_TYPE_PERIODIC) &&
              (params->voice_psc_cap == DISABLE_FOR_THIS_AC ||
               params->voice_psc_cap == ENABLE_FOR_THIS_AC ||
               params->voice_psc_cap == ENABLE_FOR_ALL_AC) &&
              (params->tsid == WMI_IMPLICIT_PSTREAM ||
               params->tsid <= WMI_MAX_THINSTREAM))) {
                return -EINVAL;
        }

        /*
         * Check nominal PHY rate is >= minimalPHY,
         * so that DUT can allow TSRS IE
         */

        /* Get the physical rate (units of bps) */
        min_phy = ((le32_to_cpu(params->min_phy_rate) / 1000) / 1000);

        /* Check minimal phy < nominal phy rate */
        if (params->nominal_phy >= min_phy) {
                /* unit of 500 kbps */
                nominal_phy = (params->nominal_phy * 1000) / 500;
                ath6kl_dbg(ATH6KL_DBG_WMI,
                           "TSRS IE enabled::MinPhy %x->NominalPhy ===> %x\n",
                           min_phy, nominal_phy);

                params->nominal_phy = nominal_phy;
        } else {
                params->nominal_phy = 0;
        }

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "sending create_pstream_cmd: ac=%d  tsid:%d\n",
                   params->traffic_class, params->tsid);

        cmd = (struct wmi_create_pstream_cmd *) skb->data;
        memcpy(cmd, params, sizeof(*cmd));

        /* This is an implicitly created Fat pipe */
        if ((u32) params->tsid == (u32) WMI_IMPLICIT_PSTREAM) {
                spin_lock_bh(&wmi->lock);
                fatpipe_exist_for_ac = (wmi->fat_pipe_exist &
                                        (1 << params->traffic_class));
                wmi->fat_pipe_exist |= (1 << params->traffic_class);
                spin_unlock_bh(&wmi->lock);
        } else {
                /* explicitly created thin stream within a fat pipe */
                spin_lock_bh(&wmi->lock);
                fatpipe_exist_for_ac = (wmi->fat_pipe_exist &
                                        (1 << params->traffic_class));
                wmi->stream_exist_for_ac[params->traffic_class] |=
                    (1 << params->tsid);
                /*
                 * If a thinstream becomes active, the fat pipe automatically
                 * becomes active
                 */
                wmi->fat_pipe_exist |= (1 << params->traffic_class);
                spin_unlock_bh(&wmi->lock);
        }

        /*
         * Indicate activty change to driver layer only if this is the
         * first TSID to get created in this AC explicitly or an implicit
         * fat pipe is getting created.
         */
        if (!fatpipe_exist_for_ac)
                ath6kl_indicate_tx_activity(wmi->parent_dev,
                                            params->traffic_class, true);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_CREATE_PSTREAM_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_delete_pstream_cmd(struct wmi *wmi, u8 if_idx, u8 traffic_class,
                                  u8 tsid)
{
        struct sk_buff *skb;
        struct wmi_delete_pstream_cmd *cmd;
        u16 active_tsids = 0;
        int ret;

        if (traffic_class > 3) {
                ath6kl_err("invalid traffic class: %d\n", traffic_class);
                return -EINVAL;
        }

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_delete_pstream_cmd *) skb->data;
        cmd->traffic_class = traffic_class;
        cmd->tsid = tsid;

        spin_lock_bh(&wmi->lock);
        active_tsids = wmi->stream_exist_for_ac[traffic_class];
        spin_unlock_bh(&wmi->lock);

        if (!(active_tsids & (1 << tsid))) {
                dev_kfree_skb(skb);
                ath6kl_dbg(ATH6KL_DBG_WMI,
                           "TSID %d doesn't exist for traffic class: %d\n",
                           tsid, traffic_class);
                return -ENODATA;
        }

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "sending delete_pstream_cmd: traffic class: %d tsid=%d\n",
                   traffic_class, tsid);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_DELETE_PSTREAM_CMDID,
                                  SYNC_BEFORE_WMIFLAG);

        spin_lock_bh(&wmi->lock);
        wmi->stream_exist_for_ac[traffic_class] &= ~(1 << tsid);
        active_tsids = wmi->stream_exist_for_ac[traffic_class];
        spin_unlock_bh(&wmi->lock);

        /*
         * Indicate stream inactivity to driver layer only if all tsids
         * within this AC are deleted.
         */
        if (!active_tsids) {
                ath6kl_indicate_tx_activity(wmi->parent_dev,
                                            traffic_class, false);
                wmi->fat_pipe_exist &= ~(1 << traffic_class);
        }

        return ret;
}

int ath6kl_wmi_set_ip_cmd(struct wmi *wmi, u8 if_idx,
                          __be32 ips0, __be32 ips1)
{
        struct sk_buff *skb;
        struct wmi_set_ip_cmd *cmd;
        int ret;

        /* Multicast address are not valid */
        if (ipv4_is_multicast(ips0) ||
            ipv4_is_multicast(ips1))
                return -EINVAL;

        skb = ath6kl_wmi_get_new_buf(sizeof(struct wmi_set_ip_cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_ip_cmd *) skb->data;
        cmd->ips[0] = ips0;
        cmd->ips[1] = ips1;

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_IP_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

static void ath6kl_wmi_relinquish_implicit_pstream_credits(struct wmi *wmi)
{
        u16 active_tsids;
        u8 stream_exist;
        int i;

        /*
         * Relinquish credits from all implicitly created pstreams
         * since when we go to sleep. If user created explicit
         * thinstreams exists with in a fatpipe leave them intact
         * for the user to delete.
         */
        spin_lock_bh(&wmi->lock);
        stream_exist = wmi->fat_pipe_exist;
        spin_unlock_bh(&wmi->lock);

        for (i = 0; i < WMM_NUM_AC; i++) {
                if (stream_exist & (1 << i)) {

                        /*
                         * FIXME: Is this lock & unlock inside
                         * for loop correct? may need rework.
                         */
                        spin_lock_bh(&wmi->lock);
                        active_tsids = wmi->stream_exist_for_ac[i];
                        spin_unlock_bh(&wmi->lock);

                        /*
                         * If there are no user created thin streams
                         * delete the fatpipe
                         */
                        if (!active_tsids) {
                                stream_exist &= ~(1 << i);
                                /*
                                 * Indicate inactivity to driver layer for
                                 * this fatpipe (pstream)
                                 */
                                ath6kl_indicate_tx_activity(wmi->parent_dev,
                                                            i, false);
                        }
                }
        }

        /* FIXME: Can we do this assignment without locking ? */
        spin_lock_bh(&wmi->lock);
        wmi->fat_pipe_exist = stream_exist;
        spin_unlock_bh(&wmi->lock);
}

static int ath6kl_set_bitrate_mask64(struct wmi *wmi, u8 if_idx,
                                     const struct cfg80211_bitrate_mask *mask)
{
        struct sk_buff *skb;
        int ret, mode, band;
        u64 mcsrate, ratemask[IEEE80211_NUM_BANDS];
        struct wmi_set_tx_select_rates64_cmd *cmd;

        memset(&ratemask, 0, sizeof(ratemask));
        for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
                /* copy legacy rate mask */
                ratemask[band] = mask->control[band].legacy;
                if (band == IEEE80211_BAND_5GHZ)
                        ratemask[band] =
                                mask->control[band].legacy << 4;

                /* copy mcs rate mask */
                mcsrate = mask->control[band].mcs[1];
                mcsrate <<= 8;
                mcsrate |= mask->control[band].mcs[0];
                ratemask[band] |= mcsrate << 12;
                ratemask[band] |= mcsrate << 28;
        }

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "Ratemask 64 bit: 2.4:%llx 5:%llx\n",
                   ratemask[0], ratemask[1]);

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd) * WMI_RATES_MODE_MAX);
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_tx_select_rates64_cmd *) skb->data;
        for (mode = 0; mode < WMI_RATES_MODE_MAX; mode++) {
                /* A mode operate in 5GHZ band */
                if (mode == WMI_RATES_MODE_11A ||
                    mode == WMI_RATES_MODE_11A_HT20 ||
                    mode == WMI_RATES_MODE_11A_HT40)
                        band = IEEE80211_BAND_5GHZ;
                else
                        band = IEEE80211_BAND_2GHZ;
                cmd->ratemask[mode] = cpu_to_le64(ratemask[band]);
        }

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb,
                                  WMI_SET_TX_SELECT_RATES_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

static int ath6kl_set_bitrate_mask32(struct wmi *wmi, u8 if_idx,
                                     const struct cfg80211_bitrate_mask *mask)
{
        struct sk_buff *skb;
        int ret, mode, band;
        u32 mcsrate, ratemask[IEEE80211_NUM_BANDS];
        struct wmi_set_tx_select_rates32_cmd *cmd;

        memset(&ratemask, 0, sizeof(ratemask));
        for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
                /* copy legacy rate mask */
                ratemask[band] = mask->control[band].legacy;
                if (band == IEEE80211_BAND_5GHZ)
                        ratemask[band] =
                                mask->control[band].legacy << 4;

                /* copy mcs rate mask */
                mcsrate = mask->control[band].mcs[0];
                ratemask[band] |= mcsrate << 12;
                ratemask[band] |= mcsrate << 20;
        }

        ath6kl_dbg(ATH6KL_DBG_WMI,
                   "Ratemask 32 bit: 2.4:%x 5:%x\n",
                   ratemask[0], ratemask[1]);

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd) * WMI_RATES_MODE_MAX);
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_tx_select_rates32_cmd *) skb->data;
        for (mode = 0; mode < WMI_RATES_MODE_MAX; mode++) {
                /* A mode operate in 5GHZ band */
                if (mode == WMI_RATES_MODE_11A ||
                    mode == WMI_RATES_MODE_11A_HT20 ||
                    mode == WMI_RATES_MODE_11A_HT40)
                        band = IEEE80211_BAND_5GHZ;
                else
                        band = IEEE80211_BAND_2GHZ;
                cmd->ratemask[mode] = cpu_to_le32(ratemask[band]);
        }

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb,
                                  WMI_SET_TX_SELECT_RATES_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_set_bitrate_mask(struct wmi *wmi, u8 if_idx,
                                const struct cfg80211_bitrate_mask *mask)
{
        struct ath6kl *ar = wmi->parent_dev;

        if (ar->hw.flags & ATH6KL_HW_FLAG_64BIT_RATES)
                return ath6kl_set_bitrate_mask64(wmi, if_idx, mask);
        else
                return ath6kl_set_bitrate_mask32(wmi, if_idx, mask);
}

int ath6kl_wmi_set_host_sleep_mode_cmd(struct wmi *wmi, u8 if_idx,
                                       enum ath6kl_host_mode host_mode)
{
        struct sk_buff *skb;
        struct wmi_set_host_sleep_mode_cmd *cmd;
        int ret;

        if ((host_mode != ATH6KL_HOST_MODE_ASLEEP) &&
            (host_mode != ATH6KL_HOST_MODE_AWAKE)) {
                ath6kl_err("invalid host sleep mode: %d\n", host_mode);
                return -EINVAL;
        }

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_host_sleep_mode_cmd *) skb->data;

        if (host_mode == ATH6KL_HOST_MODE_ASLEEP) {
                ath6kl_wmi_relinquish_implicit_pstream_credits(wmi);
                cmd->asleep = cpu_to_le32(1);
        } else
                cmd->awake = cpu_to_le32(1);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb,
                                  WMI_SET_HOST_SLEEP_MODE_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

/* This command has zero length payload */
static int ath6kl_wmi_host_sleep_mode_cmd_prcd_evt_rx(struct wmi *wmi,
                                                      struct ath6kl_vif *vif)
{
        struct ath6kl *ar = wmi->parent_dev;

        set_bit(HOST_SLEEP_MODE_CMD_PROCESSED, &vif->flags);
        wake_up(&ar->event_wq);

        return 0;
}

int ath6kl_wmi_set_wow_mode_cmd(struct wmi *wmi, u8 if_idx,
                                enum ath6kl_wow_mode wow_mode,
                                u32 filter, u16 host_req_delay)
{
        struct sk_buff *skb;
        struct wmi_set_wow_mode_cmd *cmd;
        int ret;

        if ((wow_mode != ATH6KL_WOW_MODE_ENABLE) &&
            wow_mode != ATH6KL_WOW_MODE_DISABLE) {
                ath6kl_err("invalid wow mode: %d\n", wow_mode);
                return -EINVAL;
        }

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_wow_mode_cmd *) skb->data;
        cmd->enable_wow = cpu_to_le32(wow_mode);
        cmd->filter = cpu_to_le32(filter);
        cmd->host_req_delay = cpu_to_le16(host_req_delay);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_WOW_MODE_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_add_wow_pattern_cmd(struct wmi *wmi, u8 if_idx,
                                   u8 list_id, u8 filter_size,
                                   u8 filter_offset, const u8 *filter,
                                   const u8 *mask)
{
        struct sk_buff *skb;
        struct wmi_add_wow_pattern_cmd *cmd;
        u16 size;
        u8 *filter_mask;
        int ret;

        /*
         * Allocate additional memory in the buffer to hold
         * filter and mask value, which is twice of filter_size.
         */
        size = sizeof(*cmd) + (2 * filter_size);

        skb = ath6kl_wmi_get_new_buf(size);
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_add_wow_pattern_cmd *) skb->data;
        cmd->filter_list_id = list_id;
        cmd->filter_size = filter_size;
        cmd->filter_offset = filter_offset;

        memcpy(cmd->filter, filter, filter_size);

        filter_mask = (u8 *) (cmd->filter + filter_size);
        memcpy(filter_mask, mask, filter_size);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_ADD_WOW_PATTERN_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

int ath6kl_wmi_del_wow_pattern_cmd(struct wmi *wmi, u8 if_idx,
                                   u16 list_id, u16 filter_id)
{
        struct sk_buff *skb;
        struct wmi_del_wow_pattern_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_del_wow_pattern_cmd *) skb->data;
        cmd->filter_list_id = cpu_to_le16(list_id);
        cmd->filter_id = cpu_to_le16(filter_id);

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_DEL_WOW_PATTERN_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

static int ath6kl_wmi_cmd_send_xtnd(struct wmi *wmi, struct sk_buff *skb,
                                    enum wmix_command_id cmd_id,
                                    enum wmi_sync_flag sync_flag)
{
        struct wmix_cmd_hdr *cmd_hdr;
        int ret;

        skb_push(skb, sizeof(struct wmix_cmd_hdr));

        cmd_hdr = (struct wmix_cmd_hdr *) skb->data;
        cmd_hdr->cmd_id = cpu_to_le32(cmd_id);

        ret = ath6kl_wmi_cmd_send(wmi, 0, skb, WMI_EXTENSION_CMDID, sync_flag);

        return ret;
}

int ath6kl_wmi_get_challenge_resp_cmd(struct wmi *wmi, u32 cookie, u32 source)
{
        struct sk_buff *skb;
        struct wmix_hb_challenge_resp_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmix_hb_challenge_resp_cmd *) skb->data;
        cmd->cookie = cpu_to_le32(cookie);
        cmd->source = cpu_to_le32(source);

        ret = ath6kl_wmi_cmd_send_xtnd(wmi, skb, WMIX_HB_CHALLENGE_RESP_CMDID,
                                       NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_config_debug_module_cmd(struct wmi *wmi, u32 valid, u32 config)
{
        struct ath6kl_wmix_dbglog_cfg_module_cmd *cmd;
        struct sk_buff *skb;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct ath6kl_wmix_dbglog_cfg_module_cmd *) skb->data;
        cmd->valid = cpu_to_le32(valid);
        cmd->config = cpu_to_le32(config);

        ret = ath6kl_wmi_cmd_send_xtnd(wmi, skb, WMIX_DBGLOG_CFG_MODULE_CMDID,
                                       NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_get_stats_cmd(struct wmi *wmi, u8 if_idx)
{
        return ath6kl_wmi_simple_cmd(wmi, if_idx, WMI_GET_STATISTICS_CMDID);
}

int ath6kl_wmi_set_tx_pwr_cmd(struct wmi *wmi, u8 if_idx, u8 dbM)
{
        struct sk_buff *skb;
        struct wmi_set_tx_pwr_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(struct wmi_set_tx_pwr_cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_tx_pwr_cmd *) skb->data;
        cmd->dbM = dbM;

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_TX_PWR_CMDID,
                                  NO_SYNC_WMIFLAG);

        return ret;
}

int ath6kl_wmi_get_tx_pwr_cmd(struct wmi *wmi, u8 if_idx)
{
        return ath6kl_wmi_simple_cmd(wmi, if_idx, WMI_GET_TX_PWR_CMDID);
}

int ath6kl_wmi_get_roam_tbl_cmd(struct wmi *wmi)
{
        return ath6kl_wmi_simple_cmd(wmi, 0, WMI_GET_ROAM_TBL_CMDID);
}

int ath6kl_wmi_set_lpreamble_cmd(struct wmi *wmi, u8 if_idx, u8 status,
                                 u8 preamble_policy)
{
        struct sk_buff *skb;
        struct wmi_set_lpreamble_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(struct wmi_set_lpreamble_cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_lpreamble_cmd *) skb->data;
        cmd->status = status;
        cmd->preamble_policy = preamble_policy;

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_LPREAMBLE_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_set_rts_cmd(struct wmi *wmi, u16 threshold)
{
        struct sk_buff *skb;
        struct wmi_set_rts_cmd *cmd;
        int ret;

        skb = ath6kl_wmi_get_new_buf(sizeof(struct wmi_set_rts_cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_rts_cmd *) skb->data;
        cmd->threshold = cpu_to_le16(threshold);

        ret = ath6kl_wmi_cmd_send(wmi, 0, skb, WMI_SET_RTS_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}

int ath6kl_wmi_set_wmm_txop(struct wmi *wmi, u8 if_idx, enum wmi_txop_cfg cfg)
{
        struct sk_buff *skb;
        struct wmi_set_wmm_txop_cmd *cmd;
        int ret;

        if (!((cfg == WMI_TXOP_DISABLED) || (cfg == WMI_TXOP_ENABLED)))
                return -EINVAL;

        skb = ath6kl_wmi_get_new_buf(sizeof(struct wmi_set_wmm_txop_cmd));
        if (!skb)
                return -ENOMEM;

        cmd = (struct wmi_set_wmm_txop_cmd *) skb->data;
        cmd->txop_enable = cfg;

        ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_WMM_TXOP_CMDID,
                                  NO_SYNC_WMIFLAG);
        return ret;
}