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tegrakernel/kernel/nvidia/drivers/net/wireless/bcmdhd/dhd_cdc.c

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/*
* DHD Protocol Module for CDC and BDC.
*
* Copyright (C) 1999-2015, 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.
*
* $Id: dhd_cdc.c 530091 2015-01-29 04:30:33Z $
*
* 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
#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;
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)
{
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 */
err = dhd_bus_txctl(dhd->bus, (uchar*)&prot->msg, len);
DHD_OS_WAKE_UNLOCK(dhd);
return err;
}
static int
dhdcdc_cmplt(dhd_pub_t *dhd, uint32 id, uint32 len)
{
int ret;
int cdc_len = len + sizeof(cdc_ioctl_t);
dhd_prot_t *prot = dhd->prot;
DHD_TRACE(("%s: Enter\n", __FUNCTION__));
do {
ret = dhd_bus_rxctl(dhd->bus, (uchar*)&prot->msg, cdc_len);
if (ret < 0)
break;
} while (CDC_IOC_ID(ltoh32(prot->msg.flags)) != id);
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;
}
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);
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;
}
/* Check the ERROR flag */
if (flags & CDCF_IOC_ERROR)
{
ret = ltoh32(msg->status);
/* Cache error from dongle */
dhd->dongle_error = ret;
}
done:
return ret;
}
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;
if ((dhd->busstate == DHD_BUS_DOWN) || dhd->hang_was_sent) {
DHD_ERROR(("%s : bus is down. we have nothing to do\n", __FUNCTION__));
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", (char*)buf));
}
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);
}
/* 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)
{
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;
}
if ((*ifidx = BDC_GET_IF_IDX(h)) >= DHD_MAX_IFS) {
DHD_ERROR(("%s: rx data ifnum out of range (%d)\n",
__FUNCTION__, *ifidx));
return BCME_ERROR;
}
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);
}
#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__));
/* 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;
dhd_process_cid_mac(dhd, TRUE);
ret = dhd_preinit_ioctls(dhd);
if (!ret)
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 TRUE;
}
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;
}
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