4 * Copyright (c) 2004-2007 Atheros Communications Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation;
12 * Software distributed under the License is distributed on an "AS
13 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14 * implied. See the License for the specific language governing
15 * rights and limitations under the License.
20 #include <linux/kernel.h>
21 #include <linux/skbuff.h>
26 #include "htc_packet.h"
28 #define AR6000_DATA_OFFSET 64
30 void a_netbuf_enqueue(A_NETBUF_QUEUE_T
*q
, void *pkt
)
32 skb_queue_tail((struct sk_buff_head
*) q
, (struct sk_buff
*) pkt
);
35 void a_netbuf_prequeue(A_NETBUF_QUEUE_T
*q
, void *pkt
)
37 skb_queue_head((struct sk_buff_head
*) q
, (struct sk_buff
*) pkt
);
40 void *a_netbuf_dequeue(A_NETBUF_QUEUE_T
*q
)
42 return((void *) skb_dequeue((struct sk_buff_head
*) q
));
45 int a_netbuf_queue_size(A_NETBUF_QUEUE_T
*q
)
47 return(skb_queue_len((struct sk_buff_head
*) q
));
50 int a_netbuf_queue_empty(A_NETBUF_QUEUE_T
*q
)
52 return(skb_queue_empty((struct sk_buff_head
*) q
));
55 void a_netbuf_queue_init(A_NETBUF_QUEUE_T
*q
)
57 skb_queue_head_init((struct sk_buff_head
*) q
);
61 a_netbuf_alloc(int size
)
64 skb
= dev_alloc_skb(AR6000_DATA_OFFSET
+ sizeof(HTC_PACKET
) + size
);
65 skb_reserve(skb
, AR6000_DATA_OFFSET
+ sizeof(HTC_PACKET
));
70 * Allocate an SKB w.o. any encapsulation requirement.
73 a_netbuf_alloc_raw(int size
)
77 skb
= dev_alloc_skb(size
);
83 a_netbuf_free(void *bufPtr
)
85 struct sk_buff
*skb
= (struct sk_buff
*)bufPtr
;
91 a_netbuf_to_len(void *bufPtr
)
93 return (((struct sk_buff
*)bufPtr
)->len
);
97 a_netbuf_to_data(void *bufPtr
)
99 return (((struct sk_buff
*)bufPtr
)->data
);
103 * Add len # of bytes to the beginning of the network buffer
104 * pointed to by bufPtr
107 a_netbuf_push(void *bufPtr
, A_INT32 len
)
109 skb_push((struct sk_buff
*)bufPtr
, len
);
115 * Add len # of bytes to the beginning of the network buffer
116 * pointed to by bufPtr and also fill with data
119 a_netbuf_push_data(void *bufPtr
, char *srcPtr
, A_INT32 len
)
121 skb_push((struct sk_buff
*) bufPtr
, len
);
122 A_MEMCPY(((struct sk_buff
*)bufPtr
)->data
, srcPtr
, len
);
128 * Add len # of bytes to the end of the network buffer
129 * pointed to by bufPtr
132 a_netbuf_put(void *bufPtr
, A_INT32 len
)
134 skb_put((struct sk_buff
*)bufPtr
, len
);
140 * Add len # of bytes to the end of the network buffer
141 * pointed to by bufPtr and also fill with data
144 a_netbuf_put_data(void *bufPtr
, char *srcPtr
, A_INT32 len
)
146 char *start
= ((struct sk_buff
*)bufPtr
)->data
+
147 ((struct sk_buff
*)bufPtr
)->len
;
148 skb_put((struct sk_buff
*)bufPtr
, len
);
149 A_MEMCPY(start
, srcPtr
, len
);
156 * Trim the network buffer pointed to by bufPtr to len # of bytes
159 a_netbuf_setlen(void *bufPtr
, A_INT32 len
)
161 skb_trim((struct sk_buff
*)bufPtr
, len
);
167 * Chop of len # of bytes from the end of the buffer.
170 a_netbuf_trim(void *bufPtr
, A_INT32 len
)
172 skb_trim((struct sk_buff
*)bufPtr
, ((struct sk_buff
*)bufPtr
)->len
- len
);
178 * Chop of len # of bytes from the end of the buffer and return the data.
181 a_netbuf_trim_data(void *bufPtr
, char *dstPtr
, A_INT32 len
)
183 char *start
= ((struct sk_buff
*)bufPtr
)->data
+
184 (((struct sk_buff
*)bufPtr
)->len
- len
);
186 A_MEMCPY(dstPtr
, start
, len
);
187 skb_trim((struct sk_buff
*)bufPtr
, ((struct sk_buff
*)bufPtr
)->len
- len
);
194 * Returns the number of bytes available to a a_netbuf_push()
197 a_netbuf_headroom(void *bufPtr
)
199 return (skb_headroom((struct sk_buff
*)bufPtr
));
203 * Removes specified number of bytes from the beginning of the buffer
206 a_netbuf_pull(void *bufPtr
, A_INT32 len
)
208 skb_pull((struct sk_buff
*)bufPtr
, len
);
214 * Removes specified number of bytes from the beginning of the buffer
215 * and return the data
218 a_netbuf_pull_data(void *bufPtr
, char *dstPtr
, A_INT32 len
)
220 A_MEMCPY(dstPtr
, ((struct sk_buff
*)bufPtr
)->data
, len
);
221 skb_pull((struct sk_buff
*)bufPtr
, len
);