wireless/bcmdhd/dhd_cdc.c

/*
 * DHD Protocol Module for CDC and BDC.
 *
 * Copyright (C) 1999-2017, Broadcom Corporation
 *
 *      Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 *
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions of
 * the license of that module.  An independent module is a module which is not
 * derived from this software.  The special exception does not apply to any
 * modifications of the software.
 *
 *      Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Broadcom software provided under a license
 * other than the GPL, without Broadcom's express prior written consent.
 *
 *
 * <<Broadcom-WL-IPTag/Open:>>
 *
 * $Id: dhd_cdc.c 699163 2017-05-12 05:18:23Z $
 *
 * BDC is like CDC, except it includes a header for data packets to convey
 * packet priority over the bus, and flags (e.g. to indicate checksum status
 * for dongle offload.)
 */

#include <typedefs.h>
#include <osl.h>

#include <bcmutils.h>
#include <bcmcdc.h>
#include <bcmendian.h>

#include <dngl_stats.h>
#include <dhd.h>
#include <dhd_proto.h>
#include <dhd_bus.h>
#include <dhd_dbg.h>


#ifdef PROP_TXSTATUS
#include <wlfc_proto.h>
#include <dhd_wlfc.h>
#endif
#ifdef BCMDBUS
#include <dhd_config.h>
#endif /* BCMDBUS */

#ifdef DHD_ULP
#include <dhd_ulp.h>
#endif /* DHD_ULP */


#define RETRIES 2        /* # of retries to retrieve matching ioctl response */
#define BUS_HEADER_LEN    (24+DHD_SDALIGN)    /* Must be at least SDPCM_RESERVE
                 * defined in dhd_sdio.c (amount of header tha might be added)
                 * plus any space that might be needed for alignment padding.
                 */
#define ROUND_UP_MARGIN    2048    /* Biggest SDIO block size possible for
                 * round off at the end of buffer
                 */

typedef struct dhd_prot {
    uint16 reqid;
    uint8 pending;
    uint32 lastcmd;
#ifdef BCMDBUS
    uint ctl_completed;
#endif /* BCMDBUS */
    uint8 bus_header[BUS_HEADER_LEN];
    cdc_ioctl_t msg;
    unsigned char buf[WLC_IOCTL_MAXLEN + ROUND_UP_MARGIN];
} dhd_prot_t;

static int
dhdcdc_msg(dhd_pub_t *dhd)
{
#ifdef BCMDBUS
    int timeout = 0;
#endif /* BCMDBUS */
    int err = 0;
    dhd_prot_t *prot = dhd->prot;
    int len = ltoh32(prot->msg.len) + sizeof(cdc_ioctl_t);

    DHD_TRACE(("%s: Enter\n", __FUNCTION__));

    DHD_OS_WAKE_LOCK(dhd);

    /* NOTE : cdc->msg.len holds the desired length of the buffer to be
     *        returned. Only up to CDC_MAX_MSG_SIZE of this buffer area
     *      is actually sent to the dongle
     */
    if (len > CDC_MAX_MSG_SIZE)
        len = CDC_MAX_MSG_SIZE;

    /* Send request */
#ifdef BCMDBUS
    DHD_OS_IOCTL_RESP_LOCK(dhd);
    prot->ctl_completed = FALSE;
    err = dbus_send_ctl(dhd->bus, (void *)&prot->msg, len);
    if (err) {
        DHD_ERROR(("dbus_send_ctl error=%d\n", err));
        DHD_OS_IOCTL_RESP_UNLOCK(dhd);
        DHD_OS_WAKE_UNLOCK(dhd);
        return err;
    }
#else
    err = dhd_bus_txctl(dhd->bus, (uchar*)&prot->msg, len);
#endif /* BCMDBUS */

#ifdef BCMDBUS
    timeout = dhd_os_ioctl_resp_wait(dhd, &prot->ctl_completed, false);
    if ((!timeout) || (!prot->ctl_completed)) {
        DHD_ERROR(("Txctl timeout %d ctl_completed %d\n",
            timeout, prot->ctl_completed));
        DHD_ERROR(("Txctl wait timed out\n"));
        err = -1;
    }
    DHD_OS_IOCTL_RESP_UNLOCK(dhd);
#endif /* BCMDBUS */
#if defined(BCMDBUS) && defined(INTR_EP_ENABLE)
    /* If the ctl write is successfully completed, wait for an acknowledgement
    * that indicates that it is now ok to do ctl read from the dongle
    */
    if (err != -1) {
        DHD_OS_IOCTL_RESP_LOCK(dhd);
        prot->ctl_completed = FALSE;
        if (dbus_poll_intr(dhd->dbus)) {
            DHD_ERROR(("dbus_poll_intr not submitted\n"));
        } else {
            /* interrupt polling is sucessfully submitted. Wait for dongle to send
            * interrupt
            */
            timeout = dhd_os_ioctl_resp_wait(dhd, &prot->ctl_completed, false);
            if (!timeout) {
                DHD_ERROR(("intr poll wait timed out\n"));
            }
        }
        DHD_OS_IOCTL_RESP_UNLOCK(dhd);
    }
#endif /* defined(BCMDBUS) && defined(INTR_EP_ENABLE) */
    DHD_OS_WAKE_UNLOCK(dhd);
    return err;
}

static int
dhdcdc_cmplt(dhd_pub_t *dhd, uint32 id, uint32 len)
{
#ifdef BCMDBUS
    int timeout = 0;
#endif /* BCMDBUS */
    int ret;
    int cdc_len = len + sizeof(cdc_ioctl_t);
    dhd_prot_t *prot = dhd->prot;

    DHD_TRACE(("%s: Enter\n", __FUNCTION__));

    do {
#ifdef BCMDBUS
        DHD_OS_IOCTL_RESP_LOCK(dhd);
        prot->ctl_completed = FALSE;
        ret = dbus_recv_ctl(dhd->bus, (uchar *)&prot->msg, cdc_len);
        if (ret) {
            DHD_ERROR(("dbus_recv_ctl error=0x%x(%d)\n", ret, ret));
            DHD_OS_IOCTL_RESP_UNLOCK(dhd);
            goto done;
        }
        timeout = dhd_os_ioctl_resp_wait(dhd, &prot->ctl_completed, false);
        if ((!timeout) || (!prot->ctl_completed)) {
            DHD_ERROR(("Rxctl timeout %d ctl_completed %d\n",
                timeout, prot->ctl_completed));
            ret = -1;
            DHD_OS_IOCTL_RESP_UNLOCK(dhd);

            goto done;
        }
        DHD_OS_IOCTL_RESP_UNLOCK(dhd);

        ret = cdc_len;
#else
        ret = dhd_bus_rxctl(dhd->bus, (uchar*)&prot->msg, cdc_len);
#endif /* BCMDBUS */
        if (ret < 0)
            break;
    } while (CDC_IOC_ID(ltoh32(prot->msg.flags)) != id);

#ifdef BCMDBUS
done:
#endif /* BCMDBUS */
    return ret;
}

static int
dhdcdc_query_ioctl(dhd_pub_t *dhd, int ifidx, uint cmd, void *buf, uint len, uint8 action)
{
    dhd_prot_t *prot = dhd->prot;
    cdc_ioctl_t *msg = &prot->msg;
    int ret = 0, retries = 0;
    uint32 id, flags = 0;

    DHD_TRACE(("%s: Enter\n", __FUNCTION__));
    DHD_CTL(("%s: cmd %d len %d\n", __FUNCTION__, cmd, len));


    /* Respond "bcmerror" and "bcmerrorstr" with local cache */
    if (cmd == WLC_GET_VAR && buf)
    {
        if (!strcmp((char *)buf, "bcmerrorstr"))
        {
            strncpy((char *)buf, bcmerrorstr(dhd->dongle_error), BCME_STRLEN);
            goto done;
        }
        else if (!strcmp((char *)buf, "bcmerror"))
        {
            *(int *)buf = dhd->dongle_error;
            goto done;
        }
    }

    memset(msg, 0, sizeof(cdc_ioctl_t));

    msg->cmd = htol32(cmd);
    msg->len = htol32(len);
    msg->flags = (++prot->reqid << CDCF_IOC_ID_SHIFT);
    CDC_SET_IF_IDX(msg, ifidx);
    /* add additional action bits */
    action &= WL_IOCTL_ACTION_MASK;
    msg->flags |= (action << CDCF_IOC_ACTION_SHIFT);
    msg->flags = htol32(msg->flags);

    if (buf)
        memcpy(prot->buf, buf, len);

    if ((ret = dhdcdc_msg(dhd)) < 0) {
        if (!dhd->hang_was_sent)
        DHD_ERROR(("dhdcdc_query_ioctl: dhdcdc_msg failed w/status %d\n", ret));
        goto done;
    }

retry:
    /* wait for interrupt and get first fragment */
    if ((ret = dhdcdc_cmplt(dhd, prot->reqid, len)) < 0)
        goto done;

    flags = ltoh32(msg->flags);
    id = (flags & CDCF_IOC_ID_MASK) >> CDCF_IOC_ID_SHIFT;

    if ((id < prot->reqid) && (++retries < RETRIES))
        goto retry;
    if (id != prot->reqid) {
        DHD_ERROR(("%s: %s: unexpected request id %d (expected %d)\n",
                   dhd_ifname(dhd, ifidx), __FUNCTION__, id, prot->reqid));
        ret = -EINVAL;
        goto done;
    }

    /* Copy info buffer */
    if (buf)
    {
        if (ret < (int)len)
            len = ret;
        memcpy(buf, (void*) prot->buf, len);
    }

    /* Check the ERROR flag */
    if (flags & CDCF_IOC_ERROR)
    {
        ret = ltoh32(msg->status);
        /* Cache error from dongle */
        dhd->dongle_error = ret;
    }

done:
    return ret;
}


static int
dhdcdc_set_ioctl(dhd_pub_t *dhd, int ifidx, uint cmd, void *buf, uint len, uint8 action)
{
    dhd_prot_t *prot = dhd->prot;
    cdc_ioctl_t *msg = &prot->msg;
    int ret = 0;
    uint32 flags, id;

    DHD_TRACE(("%s: Enter\n", __FUNCTION__));
    DHD_CTL(("%s: cmd %d len %d\n", __FUNCTION__, cmd, len));

    if (dhd->busstate == DHD_BUS_DOWN) {
        DHD_ERROR(("%s : bus is down. we have nothing to do\n", __FUNCTION__));
        return -EIO;
    }

    /* don't talk to the dongle if fw is about to be reloaded */
    if (dhd->hang_was_sent) {
        DHD_ERROR(("%s: HANG was sent up earlier. Not talking to the chip\n",
            __FUNCTION__));
        return -EIO;
    }

    if (cmd == WLC_SET_PM) {
        DHD_TRACE_HW4(("%s: SET PM to %d\n", __FUNCTION__, buf ? *(char *)buf : 0));
    }

    memset(msg, 0, sizeof(cdc_ioctl_t));

    msg->cmd = htol32(cmd);
    msg->len = htol32(len);
    msg->flags = (++prot->reqid << CDCF_IOC_ID_SHIFT);
    CDC_SET_IF_IDX(msg, ifidx);
    /* add additional action bits */
    action &= WL_IOCTL_ACTION_MASK;
    msg->flags |= (action << CDCF_IOC_ACTION_SHIFT) | CDCF_IOC_SET;
    msg->flags = htol32(msg->flags);

    if (buf)
        memcpy(prot->buf, buf, len);

#ifdef DHD_ULP
    if (buf && (!strncmp(buf, "ulp", sizeof("ulp")))) {
        /* force all the writes after this point to NOT to use cached sbwad value */
        dhd_ulp_disable_cached_sbwad(dhd);
    }
#endif /* DHD_ULP */

    if ((ret = dhdcdc_msg(dhd)) < 0) {
        DHD_ERROR(("%s: dhdcdc_msg failed w/status %d\n", __FUNCTION__, ret));
        goto done;
    }

    if ((ret = dhdcdc_cmplt(dhd, prot->reqid, len)) < 0)
        goto done;

    flags = ltoh32(msg->flags);
    id = (flags & CDCF_IOC_ID_MASK) >> CDCF_IOC_ID_SHIFT;

    if (id != prot->reqid) {
        DHD_ERROR(("%s: %s: unexpected request id %d (expected %d)\n",
                   dhd_ifname(dhd, ifidx), __FUNCTION__, id, prot->reqid));
        ret = -EINVAL;
        goto done;
    }

#ifdef DHD_ULP
    /* For ulp prototyping temporary */
    if ((ret = dhd_ulp_check_ulp_request(dhd, buf)) < 0)
        goto done;
#endif /* DHD_ULP */

    /* Check the ERROR flag */
    if (flags & CDCF_IOC_ERROR)
    {
        ret = ltoh32(msg->status);
        /* Cache error from dongle */
        dhd->dongle_error = ret;
    }

done:
    return ret;
}

#ifdef BCMDBUS
int
dhd_prot_ctl_complete(dhd_pub_t *dhd)
{
    dhd_prot_t *prot;

    if (dhd == NULL)
        return BCME_ERROR;

    prot = dhd->prot;

    ASSERT(prot);
    DHD_OS_IOCTL_RESP_LOCK(dhd);
    prot->ctl_completed = TRUE;
    dhd_os_ioctl_resp_wake(dhd);
    DHD_OS_IOCTL_RESP_UNLOCK(dhd);
    return 0;
}
#endif /* BCMDBUS */

int
dhd_prot_ioctl(dhd_pub_t *dhd, int ifidx, wl_ioctl_t * ioc, void * buf, int len)
{
    dhd_prot_t *prot = dhd->prot;
    int ret = -1;
    uint8 action;
    static int error_cnt = 0;

    if ((dhd->busstate == DHD_BUS_DOWN) || dhd->hang_was_sent) {
        DHD_ERROR(("%s : bus is down. we have nothing to do - bs: %d, has: %d\n",
                __FUNCTION__, dhd->busstate, dhd->hang_was_sent));
        goto done;
    }

    DHD_TRACE(("%s: Enter\n", __FUNCTION__));

    ASSERT(len <= WLC_IOCTL_MAXLEN);

    if (len > WLC_IOCTL_MAXLEN)
        goto done;

    if (prot->pending == TRUE) {
        DHD_ERROR(("CDC packet is pending!!!! cmd=0x%x (%lu) lastcmd=0x%x (%lu)\n",
            ioc->cmd, (unsigned long)ioc->cmd, prot->lastcmd,
            (unsigned long)prot->lastcmd));
        if ((ioc->cmd == WLC_SET_VAR) || (ioc->cmd == WLC_GET_VAR)) {
            DHD_TRACE(("iovar cmd=%s\n", buf ? (char*)buf : "\0"));
        }
        goto done;
    }

    prot->pending = TRUE;
    prot->lastcmd = ioc->cmd;
    action = ioc->set;
    if (action & WL_IOCTL_ACTION_SET)
        ret = dhdcdc_set_ioctl(dhd, ifidx, ioc->cmd, buf, len, action);
    else {
        ret = dhdcdc_query_ioctl(dhd, ifidx, ioc->cmd, buf, len, action);
        if (ret > 0)
            ioc->used = ret - sizeof(cdc_ioctl_t);
    }
    // terence 20130805: send hang event to wpa_supplicant
    if (ret == -EIO) {
        error_cnt++;
        if (error_cnt > 2)
            ret = -ETIMEDOUT;
    } else
        error_cnt = 0;

    /* Too many programs assume ioctl() returns 0 on success */
    if (ret >= 0)
        ret = 0;
    else {
        cdc_ioctl_t *msg = &prot->msg;
        ioc->needed = ltoh32(msg->len); /* len == needed when set/query fails from dongle */
    }

    /* Intercept the wme_dp ioctl here */
    if ((!ret) && (ioc->cmd == WLC_SET_VAR) && (!strcmp(buf, "wme_dp"))) {
        int slen, val = 0;

        slen = strlen("wme_dp") + 1;
        if (len >= (int)(slen + sizeof(int)))
            bcopy(((char *)buf + slen), &val, sizeof(int));
        dhd->wme_dp = (uint8) ltoh32(val);
    }

    prot->pending = FALSE;

done:

    return ret;
}

int
dhd_prot_iovar_op(dhd_pub_t *dhdp, const char *name,
                  void *params, int plen, void *arg, int len, bool set)
{
    return BCME_UNSUPPORTED;
}

void
dhd_prot_dump(dhd_pub_t *dhdp, struct bcmstrbuf *strbuf)
{
    if (!dhdp || !dhdp->prot) {
        return;
    }

    bcm_bprintf(strbuf, "Protocol CDC: reqid %d\n", dhdp->prot->reqid);
#ifdef PROP_TXSTATUS
    dhd_wlfc_dump(dhdp, strbuf);
#endif
}

/*    The FreeBSD PKTPUSH could change the packet buf pinter
    so we need to make it changable
*/
#define PKTBUF pktbuf
void
dhd_prot_hdrpush(dhd_pub_t *dhd, int ifidx, void *PKTBUF)
{
#ifdef BDC
    struct bdc_header *h;
#endif /* BDC */

    DHD_TRACE(("%s: Enter\n", __FUNCTION__));

#ifdef BDC
    /* Push BDC header used to convey priority for buses that don't */

    PKTPUSH(dhd->osh, PKTBUF, BDC_HEADER_LEN);

    h = (struct bdc_header *)PKTDATA(dhd->osh, PKTBUF);

    h->flags = (BDC_PROTO_VER << BDC_FLAG_VER_SHIFT);
    if (PKTSUMNEEDED(PKTBUF))
        h->flags |= BDC_FLAG_SUM_NEEDED;


    h->priority = (PKTPRIO(PKTBUF) & BDC_PRIORITY_MASK);
    h->flags2 = 0;
    h->dataOffset = 0;
#endif /* BDC */
    BDC_SET_IF_IDX(h, ifidx);
}
#undef PKTBUF    /* Only defined in the above routine */

uint
dhd_prot_hdrlen(dhd_pub_t *dhd, void *PKTBUF)
{
    uint hdrlen = 0;
#ifdef BDC
    /* Length of BDC(+WLFC) headers pushed */
    hdrlen = BDC_HEADER_LEN + (((struct bdc_header *)PKTBUF)->dataOffset * 4);
#endif
    return hdrlen;
}

int
dhd_prot_hdrpull(dhd_pub_t *dhd, int *ifidx, void *pktbuf, uchar *reorder_buf_info,
    uint *reorder_info_len)
{
#ifdef BDC
    struct bdc_header *h;
#endif
    uint8 data_offset = 0;

    DHD_TRACE(("%s: Enter\n", __FUNCTION__));

#ifdef BDC
    if (reorder_info_len)
        *reorder_info_len = 0;
    /* Pop BDC header used to convey priority for buses that don't */

    if (PKTLEN(dhd->osh, pktbuf) < BDC_HEADER_LEN) {
        DHD_ERROR(("%s: rx data too short (%d < %d)\n", __FUNCTION__,
                   PKTLEN(dhd->osh, pktbuf), BDC_HEADER_LEN));
        return BCME_ERROR;
    }

    h = (struct bdc_header *)PKTDATA(dhd->osh, pktbuf);

    if (!ifidx) {
        /* for tx packet, skip the analysis */
        data_offset = h->dataOffset;
        PKTPULL(dhd->osh, pktbuf, BDC_HEADER_LEN);
        goto exit;
    }

    *ifidx = BDC_GET_IF_IDX(h);

    if (((h->flags & BDC_FLAG_VER_MASK) >> BDC_FLAG_VER_SHIFT) != BDC_PROTO_VER) {
        DHD_ERROR(("%s: non-BDC packet received, flags = 0x%x\n",
                   dhd_ifname(dhd, *ifidx), h->flags));
        if (((h->flags & BDC_FLAG_VER_MASK) >> BDC_FLAG_VER_SHIFT) == BDC_PROTO_VER_1)
            h->dataOffset = 0;
        else
        return BCME_ERROR;
    }

    if (h->flags & BDC_FLAG_SUM_GOOD) {
        DHD_INFO(("%s: BDC packet received with good rx-csum, flags 0x%x\n",
                  dhd_ifname(dhd, *ifidx), h->flags));
        PKTSETSUMGOOD(pktbuf, TRUE);
    }

    PKTSETPRIO(pktbuf, (h->priority & BDC_PRIORITY_MASK));
    data_offset = h->dataOffset;
    PKTPULL(dhd->osh, pktbuf, BDC_HEADER_LEN);
#endif /* BDC */


#ifdef PROP_TXSTATUS
    if (!DHD_PKTTAG_PKTDIR(PKTTAG(pktbuf))) {
        /*
        - parse txstatus only for packets that came from the firmware
        */
        dhd_wlfc_parse_header_info(dhd, pktbuf, (data_offset << 2),
            reorder_buf_info, reorder_info_len);

#ifdef BCMDBUS
#ifndef DHD_WLFC_THREAD
        dhd_wlfc_commit_packets(dhd,
            (f_commitpkt_t)dhd_bus_txdata, dhd->bus, NULL, FALSE);
#endif /* DHD_WLFC_THREAD */
#endif /* BCMDBUS */
    }
#endif /* PROP_TXSTATUS */

exit:
    PKTPULL(dhd->osh, pktbuf, (data_offset << 2));
    return 0;
}


int
dhd_prot_attach(dhd_pub_t *dhd)
{
    dhd_prot_t *cdc;

    if (!(cdc = (dhd_prot_t *)DHD_OS_PREALLOC(dhd, DHD_PREALLOC_PROT, sizeof(dhd_prot_t)))) {
        DHD_ERROR(("%s: kmalloc failed\n", __FUNCTION__));
        goto fail;
    }
    memset(cdc, 0, sizeof(dhd_prot_t));

    /* ensure that the msg buf directly follows the cdc msg struct */
    if ((uintptr)(&cdc->msg + 1) != (uintptr)cdc->buf) {
        DHD_ERROR(("dhd_prot_t is not correctly defined\n"));
        goto fail;
    }

    dhd->prot = cdc;
#ifdef BDC
    dhd->hdrlen += BDC_HEADER_LEN;
#endif
    dhd->maxctl = WLC_IOCTL_MAXLEN + sizeof(cdc_ioctl_t) + ROUND_UP_MARGIN;
    return 0;

fail:
    if (cdc != NULL)
        DHD_OS_PREFREE(dhd, cdc, sizeof(dhd_prot_t));
    return BCME_NOMEM;
}

/* ~NOTE~ What if another thread is waiting on the semaphore?  Holding it? */
void
dhd_prot_detach(dhd_pub_t *dhd)
{
#ifdef PROP_TXSTATUS
    dhd_wlfc_deinit(dhd);
#endif
    DHD_OS_PREFREE(dhd, dhd->prot, sizeof(dhd_prot_t));
    dhd->prot = NULL;
}

void
dhd_prot_dstats(dhd_pub_t *dhd)
{
    /*  copy bus stats */

    dhd->dstats.tx_packets = dhd->tx_packets;
    dhd->dstats.tx_errors = dhd->tx_errors;
    dhd->dstats.rx_packets = dhd->rx_packets;
    dhd->dstats.rx_errors = dhd->rx_errors;
    dhd->dstats.rx_dropped = dhd->rx_dropped;
    dhd->dstats.multicast = dhd->rx_multicast;
    return;
}

int
dhd_sync_with_dongle(dhd_pub_t *dhd)
{
    int ret = 0;
    wlc_rev_info_t revinfo;
    DHD_TRACE(("%s: Enter\n", __FUNCTION__));

#ifdef DHD_FW_COREDUMP
    /* Check the memdump capability */
    dhd_get_memdump_info(dhd);
#endif /* DHD_FW_COREDUMP */

#ifdef BCMASSERT_LOG
    dhd_get_assert_info(dhd);
#endif /* BCMASSERT_LOG */

    /* Get the device rev info */
    memset(&revinfo, 0, sizeof(revinfo));
    ret = dhd_wl_ioctl_cmd(dhd, WLC_GET_REVINFO, &revinfo, sizeof(revinfo), FALSE, 0);
    if (ret < 0)
        goto done;
#if defined(BCMDBUS)
    if (dhd_download_fw_on_driverload) {
        dhd_conf_reset(dhd);
        dhd_conf_set_chiprev(dhd, revinfo.chipnum, revinfo.chiprev);
        dhd_conf_preinit(dhd);
        dhd_conf_read_config(dhd, dhd->conf_path);
    }
#endif /* BCMDBUS */


    DHD_SSSR_DUMP_INIT(dhd);

    dhd_process_cid_mac(dhd, TRUE);
    ret = dhd_preinit_ioctls(dhd);
    dhd_process_cid_mac(dhd, FALSE);

    /* Always assumes wl for now */
    dhd->iswl = TRUE;

done:
    return ret;
}

int dhd_prot_init(dhd_pub_t *dhd)
{
    return BCME_OK;
}

void
dhd_prot_stop(dhd_pub_t *dhd)
{
/* Nothing to do for CDC */
}


static void
dhd_get_hostreorder_pkts(void *osh, struct reorder_info *ptr, void **pkt,
    uint32 *pkt_count, void **pplast, uint8 start, uint8 end)
{
    void *plast = NULL, *p;
    uint32 pkt_cnt = 0;

    if (ptr->pend_pkts == 0) {
        DHD_REORDER(("%s: no packets in reorder queue \n", __FUNCTION__));
        *pplast = NULL;
        *pkt_count = 0;
        *pkt = NULL;
        return;
    }
    do {
        p = (void *)(ptr->p[start]);
        ptr->p[start] = NULL;

        if (p != NULL) {
            if (plast == NULL)
                *pkt = p;
            else
                PKTSETNEXT(osh, plast, p);

            plast = p;
            pkt_cnt++;
        }
        start++;
        if (start > ptr->max_idx)
            start = 0;
    } while (start != end);
    *pplast = plast;
    *pkt_count = pkt_cnt;
    ptr->pend_pkts -= (uint8)pkt_cnt;
}

int
dhd_process_pkt_reorder_info(dhd_pub_t *dhd, uchar *reorder_info_buf, uint reorder_info_len,
    void **pkt, uint32 *pkt_count)
{
    uint8 flow_id, max_idx, cur_idx, exp_idx;
    struct reorder_info *ptr;
    uint8 flags;
    void *cur_pkt, *plast = NULL;
    uint32 cnt = 0;

    if (pkt == NULL) {
        if (pkt_count != NULL)
            *pkt_count = 0;
        return 0;
    }

    flow_id = reorder_info_buf[WLHOST_REORDERDATA_FLOWID_OFFSET];
    flags = reorder_info_buf[WLHOST_REORDERDATA_FLAGS_OFFSET];

    DHD_REORDER(("flow_id %d, flags 0x%02x, idx(%d, %d, %d)\n", flow_id, flags,
        reorder_info_buf[WLHOST_REORDERDATA_CURIDX_OFFSET],
        reorder_info_buf[WLHOST_REORDERDATA_EXPIDX_OFFSET],
        reorder_info_buf[WLHOST_REORDERDATA_MAXIDX_OFFSET]));

    /* validate flags and flow id */
    if (flags == 0xFF) {
        DHD_ERROR(("%s: invalid flags...so ignore this packet\n", __FUNCTION__));
        *pkt_count = 1;
        return 0;
    }

    cur_pkt = *pkt;
    *pkt = NULL;

    ptr = dhd->reorder_bufs[flow_id];
    if (flags & WLHOST_REORDERDATA_DEL_FLOW) {
        uint32 buf_size = sizeof(struct reorder_info);

        DHD_REORDER(("%s: Flags indicating to delete a flow id %d\n",
            __FUNCTION__, flow_id));

        if (ptr == NULL) {
            DHD_REORDER(("%s: received flags to cleanup, but no flow (%d) yet\n",
                __FUNCTION__, flow_id));
            *pkt_count = 1;
            *pkt = cur_pkt;
            return 0;
        }

        dhd_get_hostreorder_pkts(dhd->osh, ptr, pkt, &cnt, &plast,
            ptr->exp_idx, ptr->exp_idx);
        /* set it to the last packet */
        if (plast) {
            PKTSETNEXT(dhd->osh, plast, cur_pkt);
            cnt++;
        }
        else {
            if (cnt != 0) {
                DHD_ERROR(("%s: del flow: something fishy, pending packets %d\n",
                    __FUNCTION__, cnt));
            }
            *pkt = cur_pkt;
            cnt = 1;
        }
        buf_size += ((ptr->max_idx + 1) * sizeof(void *));
        MFREE(dhd->osh, ptr, buf_size);
        dhd->reorder_bufs[flow_id] = NULL;
        *pkt_count = cnt;
        return 0;
    }
    /* all the other cases depend on the existance of the reorder struct for that flow id */
    if (ptr == NULL) {
        uint32 buf_size_alloc = sizeof(reorder_info_t);
        max_idx = reorder_info_buf[WLHOST_REORDERDATA_MAXIDX_OFFSET];

        buf_size_alloc += ((max_idx + 1) * sizeof(void*));
        /* allocate space to hold the buffers, index etc */

        DHD_REORDER(("%s: alloc buffer of size %d size, reorder info id %d, maxidx %d\n",
            __FUNCTION__, buf_size_alloc, flow_id, max_idx));
        ptr = (struct reorder_info *)MALLOC(dhd->osh, buf_size_alloc);
        if (ptr == NULL) {
            DHD_ERROR(("%s: Malloc failed to alloc buffer\n", __FUNCTION__));
            *pkt_count = 1;
            return 0;
        }
        bzero(ptr, buf_size_alloc);
        dhd->reorder_bufs[flow_id] = ptr;
        ptr->p = (void *)(ptr+1);
        ptr->max_idx = max_idx;
    }
    if (flags & WLHOST_REORDERDATA_NEW_HOLE)  {
        DHD_REORDER(("%s: new hole, so cleanup pending buffers\n", __FUNCTION__));
        if (ptr->pend_pkts) {
            dhd_get_hostreorder_pkts(dhd->osh, ptr, pkt, &cnt, &plast,
                ptr->exp_idx, ptr->exp_idx);
            ptr->pend_pkts = 0;
        }
        ptr->cur_idx = reorder_info_buf[WLHOST_REORDERDATA_CURIDX_OFFSET];
        ptr->exp_idx = reorder_info_buf[WLHOST_REORDERDATA_EXPIDX_OFFSET];
        ptr->max_idx = reorder_info_buf[WLHOST_REORDERDATA_MAXIDX_OFFSET];
        ptr->p[ptr->cur_idx] = cur_pkt;
        ptr->pend_pkts++;
        *pkt_count = cnt;
    }
    else if (flags & WLHOST_REORDERDATA_CURIDX_VALID) {
        cur_idx = reorder_info_buf[WLHOST_REORDERDATA_CURIDX_OFFSET];
        exp_idx = reorder_info_buf[WLHOST_REORDERDATA_EXPIDX_OFFSET];


        if ((exp_idx == ptr->exp_idx) && (cur_idx != ptr->exp_idx)) {
            /* still in the current hole */
            /* enqueue the current on the buffer chain */
            if (ptr->p[cur_idx] != NULL) {
                DHD_REORDER(("%s: HOLE: ERROR buffer pending..free it\n",
                    __FUNCTION__));
                PKTFREE(dhd->osh, ptr->p[cur_idx], TRUE);
                ptr->p[cur_idx] = NULL;
            }
            ptr->p[cur_idx] = cur_pkt;
            ptr->pend_pkts++;
            ptr->cur_idx = cur_idx;
            DHD_REORDER(("%s: fill up a hole..pending packets is %d\n",
                __FUNCTION__, ptr->pend_pkts));
            *pkt_count = 0;
            *pkt = NULL;
        }
        else if (ptr->exp_idx == cur_idx) {
            /* got the right one ..flush from cur to exp and update exp */
            DHD_REORDER(("%s: got the right one now, cur_idx is %d\n",
                __FUNCTION__, cur_idx));
            if (ptr->p[cur_idx] != NULL) {
                DHD_REORDER(("%s: Error buffer pending..free it\n",
                    __FUNCTION__));
                PKTFREE(dhd->osh, ptr->p[cur_idx], TRUE);
                ptr->p[cur_idx] = NULL;
            }
            ptr->p[cur_idx] = cur_pkt;
            ptr->pend_pkts++;

            ptr->cur_idx = cur_idx;
            ptr->exp_idx = exp_idx;

            dhd_get_hostreorder_pkts(dhd->osh, ptr, pkt, &cnt, &plast,
                cur_idx, exp_idx);
            *pkt_count = cnt;
            DHD_REORDER(("%s: freeing up buffers %d, still pending %d\n",
                __FUNCTION__, cnt, ptr->pend_pkts));
        }
        else {
            uint8 end_idx;
            bool flush_current = FALSE;
            /* both cur and exp are moved now .. */
            DHD_REORDER(("%s:, flow %d, both moved, cur %d(%d), exp %d(%d)\n",
                __FUNCTION__, flow_id, ptr->cur_idx, cur_idx,
                ptr->exp_idx, exp_idx));
            if (flags & WLHOST_REORDERDATA_FLUSH_ALL)
                end_idx = ptr->exp_idx;
            else
                end_idx = exp_idx;

            /* flush pkts first */
            dhd_get_hostreorder_pkts(dhd->osh, ptr, pkt, &cnt, &plast,
                ptr->exp_idx, end_idx);

            if (cur_idx == ptr->max_idx) {
                if (exp_idx == 0)
                    flush_current = TRUE;
            } else {
                if (exp_idx == cur_idx + 1)
                    flush_current = TRUE;
            }
            if (flush_current) {
                if (plast)
                    PKTSETNEXT(dhd->osh, plast, cur_pkt);
                else
                    *pkt = cur_pkt;
                cnt++;
            }
            else {
                ptr->p[cur_idx] = cur_pkt;
                ptr->pend_pkts++;
            }
            ptr->exp_idx = exp_idx;
            ptr->cur_idx = cur_idx;
            *pkt_count = cnt;
        }
    }
    else {
        uint8 end_idx;
        /* no real packet but update to exp_seq...that means explicit window move */
        exp_idx = reorder_info_buf[WLHOST_REORDERDATA_EXPIDX_OFFSET];

        DHD_REORDER(("%s: move the window, cur_idx is %d, exp is %d, new exp is %d\n",
            __FUNCTION__, ptr->cur_idx, ptr->exp_idx, exp_idx));
        if (flags & WLHOST_REORDERDATA_FLUSH_ALL)
            end_idx =  ptr->exp_idx;
        else
            end_idx =  exp_idx;

        dhd_get_hostreorder_pkts(dhd->osh, ptr, pkt, &cnt, &plast, ptr->exp_idx, end_idx);
        if (plast)
            PKTSETNEXT(dhd->osh, plast, cur_pkt);
        else
            *pkt = cur_pkt;
        cnt++;
        *pkt_count = cnt;
        /* set the new expected idx */
        ptr->exp_idx = exp_idx;
    }
    return 0;
}