| 1 | /* |
| 2 | * Copyright (c) 2007-2008 Atheros Communications Inc. |
| 3 | * |
| 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. |
| 7 | * |
| 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. |
| 15 | */ |
| 16 | /* */ |
| 17 | /* Module Name : wrap_buf.c */ |
| 18 | /* */ |
| 19 | /* Abstract */ |
| 20 | /* This module contains wrapper functions for buffer management */ |
| 21 | /* */ |
| 22 | /* NOTES */ |
| 23 | /* Platform dependent. */ |
| 24 | /* */ |
| 25 | /************************************************************************/ |
| 26 | |
| 27 | #include "oal_dt.h" |
| 28 | #include "usbdrv.h" |
| 29 | |
| 30 | |
| 31 | #include <linux/netlink.h> |
| 32 | |
| 33 | #include <net/iw_handler.h> |
| 34 | |
| 35 | |
| 36 | /* Called to allocate buffer, must return a continue buffer space */ |
| 37 | zbuf_t *zfwBufAllocate(zdev_t *dev, u16_t len) |
| 38 | { |
| 39 | zbuf_t *buf; |
| 40 | |
| 41 | /* Allocate SKB for packet*/ |
| 42 | buf = dev_alloc_skb(len); |
| 43 | |
| 44 | return buf; |
| 45 | } |
| 46 | |
| 47 | |
| 48 | /* Called to free buffer, replace below 3 functions */ |
| 49 | void zfwBufFree(zdev_t *dev, zbuf_t *buf, u16_t status) |
| 50 | { |
| 51 | dev_kfree_skb_any(buf); |
| 52 | } |
| 53 | |
| 54 | /* Called to adjust buffer size and head pointer */ |
| 55 | u16_t zfwBufRemoveHead(zdev_t *dev, zbuf_t *buf, u16_t size) |
| 56 | { |
| 57 | /* zm_assert(buf->len > size); */ |
| 58 | |
| 59 | buf->data += size; |
| 60 | buf->len -= size; |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | |
| 65 | |
| 66 | |
| 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) |
| 72 | { |
| 73 | |
| 74 | *head = tail; |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | /* Called when doing infra-bss forwarding */ |
| 80 | u16_t zfwBufCopy(zdev_t *dev, zbuf_t *dst, zbuf_t *src) |
| 81 | { |
| 82 | memcpy(dst->data, src->data, src->len); |
| 83 | dst->tail = dst->data; |
| 84 | skb_put(dst, src->len); |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | |
| 89 | /* Called to adjust buffer size and tail pointer */ |
| 90 | u16_t zfwBufSetSize(zdev_t *dev, zbuf_t *buf, u16_t size) |
| 91 | { |
| 92 | #ifdef NET_SKBUFF_DATA_USES_OFFSET |
| 93 | buf->tail = 0; |
| 94 | buf->len = 0; |
| 95 | #else |
| 96 | buf->tail = buf->data; |
| 97 | buf->len = 0; |
| 98 | #endif |
| 99 | |
| 100 | skb_put(buf, size); |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | u16_t zfwBufGetSize(zdev_t *dev, zbuf_t *buf) |
| 105 | { |
| 106 | return buf->len; |
| 107 | } |
| 108 | |
| 109 | void zfwCopyBufContext(zdev_t *dev, zbuf_t *source, zbuf_t *dst) |
| 110 | { |
| 111 | } |