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/*
*
* Copyright (c) 2004-2007 Atheros Communications Inc.
* All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
*
*
*/
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <a_config.h>
#include "athdefs.h"
#include "a_types.h"
#include "a_osapi.h"
#include "htc_packet.h"
#define AR6000_DATA_OFFSET 64
void a_netbuf_enqueue(A_NETBUF_QUEUE_T *q, void *pkt)
{
skb_queue_tail((struct sk_buff_head *) q, (struct sk_buff *) pkt);
}
void a_netbuf_prequeue(A_NETBUF_QUEUE_T *q, void *pkt)
{
skb_queue_head((struct sk_buff_head *) q, (struct sk_buff *) pkt);
}
void *a_netbuf_dequeue(A_NETBUF_QUEUE_T *q)
{
return((void *) skb_dequeue((struct sk_buff_head *) q));
}
int a_netbuf_queue_size(A_NETBUF_QUEUE_T *q)
{
return(skb_queue_len((struct sk_buff_head *) q));
}
int a_netbuf_queue_empty(A_NETBUF_QUEUE_T *q)
{
return(skb_queue_empty((struct sk_buff_head *) q));
}
void a_netbuf_queue_init(A_NETBUF_QUEUE_T *q)
{
skb_queue_head_init((struct sk_buff_head *) q);
}
void *
a_netbuf_alloc(int size)
{
struct sk_buff *skb;
skb = dev_alloc_skb(AR6000_DATA_OFFSET + sizeof(HTC_PACKET) + size);
skb_reserve(skb, AR6000_DATA_OFFSET + sizeof(HTC_PACKET));
return ((void *)skb);
}
/*
* Allocate an SKB w.o. any encapsulation requirement.
*/
void *
a_netbuf_alloc_raw(int size)
{
struct sk_buff *skb;
skb = dev_alloc_skb(size);
return ((void *)skb);
}
void
a_netbuf_free(void *bufPtr)
{
struct sk_buff *skb = (struct sk_buff *)bufPtr;
dev_kfree_skb(skb);
}
A_UINT32
a_netbuf_to_len(void *bufPtr)
{
return (((struct sk_buff *)bufPtr)->len);
}
void *
a_netbuf_to_data(void *bufPtr)
{
return (((struct sk_buff *)bufPtr)->data);
}
/*
* Add len # of bytes to the beginning of the network buffer
* pointed to by bufPtr
*/
A_STATUS
a_netbuf_push(void *bufPtr, A_INT32 len)
{
skb_push((struct sk_buff *)bufPtr, len);
return A_OK;
}
/*
* Add len # of bytes to the beginning of the network buffer
* pointed to by bufPtr and also fill with data
*/
A_STATUS
a_netbuf_push_data(void *bufPtr, char *srcPtr, A_INT32 len)
{
skb_push((struct sk_buff *) bufPtr, len);
A_MEMCPY(((struct sk_buff *)bufPtr)->data, srcPtr, len);
return A_OK;
}
/*
* Add len # of bytes to the end of the network buffer
* pointed to by bufPtr
*/
A_STATUS
a_netbuf_put(void *bufPtr, A_INT32 len)
{
skb_put((struct sk_buff *)bufPtr, len);
return A_OK;
}
/*
* Add len # of bytes to the end of the network buffer
* pointed to by bufPtr and also fill with data
*/
A_STATUS
a_netbuf_put_data(void *bufPtr, char *srcPtr, A_INT32 len)
{
char *start = ((struct sk_buff *)bufPtr)->data +
((struct sk_buff *)bufPtr)->len;
skb_put((struct sk_buff *)bufPtr, len);
A_MEMCPY(start, srcPtr, len);
return A_OK;
}
/*
* Trim the network buffer pointed to by bufPtr to len # of bytes
*/
A_STATUS
a_netbuf_setlen(void *bufPtr, A_INT32 len)
{
skb_trim((struct sk_buff *)bufPtr, len);
return A_OK;
}
/*
* Chop of len # of bytes from the end of the buffer.
*/
A_STATUS
a_netbuf_trim(void *bufPtr, A_INT32 len)
{
skb_trim((struct sk_buff *)bufPtr, ((struct sk_buff *)bufPtr)->len - len);
return A_OK;
}
/*
* Chop of len # of bytes from the end of the buffer and return the data.
*/
A_STATUS
a_netbuf_trim_data(void *bufPtr, char *dstPtr, A_INT32 len)
{
char *start = ((struct sk_buff *)bufPtr)->data +
(((struct sk_buff *)bufPtr)->len - len);
A_MEMCPY(dstPtr, start, len);
skb_trim((struct sk_buff *)bufPtr, ((struct sk_buff *)bufPtr)->len - len);
return A_OK;
}
/*
* Returns the number of bytes available to a a_netbuf_push()
*/
A_INT32
a_netbuf_headroom(void *bufPtr)
{
return (skb_headroom((struct sk_buff *)bufPtr));
}
/*
* Removes specified number of bytes from the beginning of the buffer
*/
A_STATUS
a_netbuf_pull(void *bufPtr, A_INT32 len)
{
skb_pull((struct sk_buff *)bufPtr, len);
return A_OK;
}
/*
* Removes specified number of bytes from the beginning of the buffer
* and return the data
*/
A_STATUS
a_netbuf_pull_data(void *bufPtr, char *dstPtr, A_INT32 len)
{
A_MEMCPY(dstPtr, ((struct sk_buff *)bufPtr)->data, len);
skb_pull((struct sk_buff *)bufPtr, len);
return A_OK;
}
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