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/*
* Copyright (c) 2010 Broadcom Corporation
*
* 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/netdevice.h>
#include <linux/module.h>
#include <brcmu_utils.h>
MODULE_AUTHOR("Broadcom Corporation");
MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN driver utilities.");
MODULE_SUPPORTED_DEVICE("Broadcom 802.11n WLAN cards");
MODULE_LICENSE("Dual BSD/GPL");
struct sk_buff *brcmu_pkt_buf_get_skb(uint len)
{
struct sk_buff *skb;
skb = dev_alloc_skb(len);
if (skb) {
skb_put(skb, len);
skb->priority = 0;
}
return skb;
}
EXPORT_SYMBOL(brcmu_pkt_buf_get_skb);
/* Free the driver packet. Free the tag if present */
void brcmu_pkt_buf_free_skb(struct sk_buff *skb)
{
WARN_ON(skb->next);
if (skb->destructor)
/* cannot kfree_skb() on hard IRQ (net/core/skbuff.c) if
* destructor exists
*/
dev_kfree_skb_any(skb);
else
/* can free immediately (even in_irq()) if destructor
* does not exist
*/
dev_kfree_skb(skb);
}
EXPORT_SYMBOL(brcmu_pkt_buf_free_skb);
/*
* osl multiple-precedence packet queue
* hi_prec is always >= the number of the highest non-empty precedence
*/
struct sk_buff *brcmu_pktq_penq(struct pktq *pq, int prec,
struct sk_buff *p)
{
struct sk_buff_head *q;
if (pktq_full(pq) || pktq_pfull(pq, prec))
return NULL;
q = &pq->q[prec].skblist;
skb_queue_tail(q, p);
pq->len++;
if (pq->hi_prec < prec)
pq->hi_prec = (u8) prec;
return p;
}
EXPORT_SYMBOL(brcmu_pktq_penq);
struct sk_buff *brcmu_pktq_penq_head(struct pktq *pq, int prec,
struct sk_buff *p)
{
struct sk_buff_head *q;
if (pktq_full(pq) || pktq_pfull(pq, prec))
return NULL;
q = &pq->q[prec].skblist;
skb_queue_head(q, p);
pq->len++;
if (pq->hi_prec < prec)
pq->hi_prec = (u8) prec;
return p;
}
EXPORT_SYMBOL(brcmu_pktq_penq_head);
struct sk_buff *brcmu_pktq_pdeq(struct pktq *pq, int prec)
{
struct sk_buff_head *q;
struct sk_buff *p;
q = &pq->q[prec].skblist;
p = skb_dequeue(q);
if (p == NULL)
return NULL;
pq->len--;
return p;
}
EXPORT_SYMBOL(brcmu_pktq_pdeq);
struct sk_buff *brcmu_pktq_pdeq_tail(struct pktq *pq, int prec)
{
struct sk_buff_head *q;
struct sk_buff *p;
q = &pq->q[prec].skblist;
p = skb_dequeue_tail(q);
if (p == NULL)
return NULL;
pq->len--;
return p;
}
EXPORT_SYMBOL(brcmu_pktq_pdeq_tail);
void
brcmu_pktq_pflush(struct pktq *pq, int prec, bool dir,
bool (*fn)(struct sk_buff *, void *), void *arg)
{
struct sk_buff_head *q;
struct sk_buff *p, *next;
q = &pq->q[prec].skblist;
skb_queue_walk_safe(q, p, next) {
if (fn == NULL || (*fn) (p, arg)) {
skb_unlink(p, q);
brcmu_pkt_buf_free_skb(p);
pq->len--;
}
}
}
EXPORT_SYMBOL(brcmu_pktq_pflush);
void brcmu_pktq_flush(struct pktq *pq, bool dir,
bool (*fn)(struct sk_buff *, void *), void *arg)
{
int prec;
for (prec = 0; prec < pq->num_prec; prec++)
brcmu_pktq_pflush(pq, prec, dir, fn, arg);
}
EXPORT_SYMBOL(brcmu_pktq_flush);
void brcmu_pktq_init(struct pktq *pq, int num_prec, int max_len)
{
int prec;
/* pq is variable size; only zero out what's requested */
memset(pq, 0,
offsetof(struct pktq, q) + (sizeof(struct pktq_prec) * num_prec));
pq->num_prec = (u16) num_prec;
pq->max = (u16) max_len;
for (prec = 0; prec < num_prec; prec++) {
pq->q[prec].max = pq->max;
skb_queue_head_init(&pq->q[prec].skblist);
}
}
EXPORT_SYMBOL(brcmu_pktq_init);
struct sk_buff *brcmu_pktq_peek_tail(struct pktq *pq, int *prec_out)
{
int prec;
if (pq->len == 0)
return NULL;
for (prec = 0; prec < pq->hi_prec; prec++)
if (!skb_queue_empty(&pq->q[prec].skblist))
break;
if (prec_out)
*prec_out = prec;
return skb_peek_tail(&pq->q[prec].skblist);
}
EXPORT_SYMBOL(brcmu_pktq_peek_tail);
/* Return sum of lengths of a specific set of precedences */
int brcmu_pktq_mlen(struct pktq *pq, uint prec_bmp)
{
int prec, len;
len = 0;
for (prec = 0; prec <= pq->hi_prec; prec++)
if (prec_bmp & (1 << prec))
len += pq->q[prec].skblist.qlen;
return len;
}
EXPORT_SYMBOL(brcmu_pktq_mlen);
/* Priority dequeue from a specific set of precedences */
struct sk_buff *brcmu_pktq_mdeq(struct pktq *pq, uint prec_bmp,
int *prec_out)
{
struct sk_buff_head *q;
struct sk_buff *p;
int prec;
if (pq->len == 0)
return NULL;
while ((prec = pq->hi_prec) > 0 &&
skb_queue_empty(&pq->q[prec].skblist))
pq->hi_prec--;
while ((prec_bmp & (1 << prec)) == 0 ||
skb_queue_empty(&pq->q[prec].skblist))
if (prec-- == 0)
return NULL;
q = &pq->q[prec].skblist;
p = skb_dequeue(q);
if (p == NULL)
return NULL;
pq->len--;
if (prec_out)
*prec_out = prec;
return p;
}
EXPORT_SYMBOL(brcmu_pktq_mdeq);
#if defined(BCMDBG)
/* pretty hex print a pkt buffer chain */
void brcmu_prpkt(const char *msg, struct sk_buff *p0)
{
struct sk_buff *p;
if (msg && (msg[0] != '\0'))
printk(KERN_DEBUG "%s:\n", msg);
for (p = p0; p; p = p->next)
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, p->data, p->len);
}
EXPORT_SYMBOL(brcmu_prpkt);
#endif /* defined(BCMDBG) */
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