bool brcmf_c_prec_enq(struct device *dev, struct pktq *q,
struct sk_buff *pkt, int prec)
{
struct sk_buff *p;
int eprec = -1; /* precedence to evict from */
bool discard_oldest;
struct brcmf_bus *bus_if = dev_get_drvdata(dev);
struct brcmf_pub *drvr = bus_if->drvr;
/* Fast case, precedence queue is not full and we are also not
* exceeding total queue length
*/
if (!pktq_pfull(q, prec) && !pktq_full(q)) {
brcmu_pktq_penq(q, prec, pkt);
return true;
}
/* Determine precedence from which to evict packet, if any */
if (pktq_pfull(q, prec))
eprec = prec;
else if (pktq_full(q)) {
p = brcmu_pktq_peek_tail(q, &eprec);
if (eprec > prec)
return false;
}
/* Evict if needed */
if (eprec >= 0) {
/* Detect queueing to unconfigured precedence */
discard_oldest = ac_bitmap_tst(drvr->wme_dp, eprec);
if (eprec == prec && !discard_oldest)
return false; /* refuse newer (incoming) packet */
/* Evict packet according to discard policy */
p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) :
brcmu_pktq_pdeq_tail(q, eprec);
if (p == NULL)
brcmf_err("brcmu_pktq_penq() failed, oldest %d\n",
discard_oldest);
brcmu_pkt_buf_free_skb(p);
}
/* Enqueue */
p = brcmu_pktq_penq(q, prec, pkt);
if (p == NULL)
brcmf_err("brcmu_pktq_penq() failed\n");
return p != NULL;
}
bool brcmf_c_prec_enq(struct brcmf_pub *drvr, struct pktq *q,
struct sk_buff *pkt, int prec)
{
struct sk_buff *p;
int eprec = -1; /* precedence to evict from */
bool discard_oldest;
/* Fast case, precedence queue is not full and we are also not
* exceeding total queue length
*/
if (!pktq_pfull(q, prec) && !pktq_full(q)) {
brcmu_pktq_penq(q, prec, pkt);
return true;
}
/* Determine precedence from which to evict packet, if any */
if (pktq_pfull(q, prec))
eprec = prec;
else if (pktq_full(q)) {
p = brcmu_pktq_peek_tail(q, &eprec);
if (eprec > prec)
return false;
}
/* Evict if needed */
if (eprec >= 0) {
/* Detect queueing to unconfigured precedence */
discard_oldest = AC_BITMAP_TST(drvr->wme_dp, eprec);
if (eprec == prec && !discard_oldest)
return false; /* refuse newer (incoming) packet */
/* Evict packet according to discard policy */
p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) :
brcmu_pktq_pdeq_tail(q, eprec);
if (p == NULL) {
BRCMF_ERROR(("%s: brcmu_pktq_penq() failed, oldest %d.",
__func__, discard_oldest));
}
brcmu_pkt_buf_free_skb(p);
}
/* Enqueue */
p = brcmu_pktq_penq(q, prec, pkt);
if (p == NULL) {
BRCMF_ERROR(("%s: brcmu_pktq_penq() failed.", __func__));
}
return p != NULL;
}
bool brcmf_c_prec_enq(struct device *dev, struct pktq *q,
struct sk_buff *pkt, int prec)
{
struct sk_buff *p;
int eprec = -1;
bool discard_oldest;
struct brcmf_bus *bus_if = dev_get_drvdata(dev);
struct brcmf_pub *drvr = bus_if->drvr;
if (!pktq_pfull(q, prec) && !pktq_full(q)) {
brcmu_pktq_penq(q, prec, pkt);
return true;
}
if (pktq_pfull(q, prec))
eprec = prec;
else if (pktq_full(q)) {
p = brcmu_pktq_peek_tail(q, &eprec);
if (eprec > prec)
return false;
}
if (eprec >= 0) {
discard_oldest = ac_bitmap_tst(drvr->wme_dp, eprec);
if (eprec == prec && !discard_oldest)
return false;
p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) :
brcmu_pktq_pdeq_tail(q, eprec);
if (p == NULL)
brcmf_dbg(ERROR, "brcmu_pktq_penq() failed, oldest %d\n",
discard_oldest);
brcmu_pkt_buf_free_skb(p);
}
p = brcmu_pktq_penq(q, prec, pkt);
if (p == NULL)
brcmf_dbg(ERROR, "brcmu_pktq_penq() failed\n");
return p != NULL;
}