2 * Copyright (c) 2007-2008 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 /* Module Name : wrap_buf.c */
20 /* This module contains wrapper functions for buffer management */
23 /* Platform dependent. */
25 /************************************************************************/
31 #include <linux/netlink.h>
33 #include <net/iw_handler.h>
36 /* Called to allocate buffer, must return a continue buffer space */
37 zbuf_t *zfwBufAllocate(zdev_t *dev, u16_t len)
41 /* Allocate SKB for packet*/
42 buf = dev_alloc_skb(len);
48 /* Called to free buffer, replace below 3 functions */
49 void zfwBufFree(zdev_t *dev, zbuf_t *buf, u16_t status)
51 dev_kfree_skb_any(buf);
54 /* Called to adjust buffer size and head pointer */
55 u16_t zfwBufRemoveHead(zdev_t *dev, zbuf_t *buf, u16_t size)
57 /* zm_assert(buf->len > size); */
67 /* return tail if head==NULL, called to chain multiple buffer together */
68 /* Used to chain Rx buffer to form a frame. if the prepared Rx buffer */
69 /* is greater than an ethernet frame(1518+32 byte), then this function */
70 /* will only be called with head=NULL. */
71 u16_t zfwBufChain(zdev_t *dev, zbuf_t **head, zbuf_t *tail)
79 /* Called when doing infra-bss forwarding */
80 u16_t zfwBufCopy(zdev_t *dev, zbuf_t *dst, zbuf_t *src)
82 memcpy(dst->data, src->data, src->len);
83 dst->tail = dst->data;
84 skb_put(dst, src->len);
89 /* Called to adjust buffer size and tail pointer */
90 u16_t zfwBufSetSize(zdev_t *dev, zbuf_t *buf, u16_t size)
92 #ifdef NET_SKBUFF_DATA_USES_OFFSET
96 buf->tail = buf->data;
104 u16_t zfwBufGetSize(zdev_t *dev, zbuf_t *buf)
109 void zfwCopyBufContext(zdev_t *dev, zbuf_t *source, zbuf_t *dst)