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/*
* RxBuf.c
*
* Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Texas Instruments nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** \file buf.c
* \brief Linux buf implementation.
*
* \see
*/
#include "tidef.h"
#include "RxBuf_linux.h"
#include <linux/netdevice.h>
/*--------------------------------------------------------------------------------------*/
/*
* Allocate BUF Rx packets.
* Add 16 bytes before the data buffer for WSPI overhead!
*/
void *RxBufAlloc(TI_HANDLE hOs, TI_UINT32 len,PacketClassTag_e ePacketClassTag)
{
TI_UINT32 alloc_len = len + WSPI_PAD_BYTES + PAYLOAD_ALIGN_PAD_BYTES + RX_HEAD_LEN_ALIGNED;
struct sk_buff *skb;
rx_head_t *rx_head;
gfp_t flags = (in_atomic()) ? GFP_ATOMIC : GFP_KERNEL;
skb = alloc_skb(alloc_len, flags);
if (!skb)
{
return NULL;
}
rx_head = (rx_head_t *)skb->head;
rx_head->skb = skb;
skb_reserve(skb, RX_HEAD_LEN_ALIGNED + WSPI_PAD_BYTES);
/*
printk("-->> RxBufAlloc(len=%d) skb=0x%x skb->data=0x%x skb->head=0x%x skb->len=%d\n",
(int)len, (int)skb, (int)skb->data, (int)skb->head, (int)skb->len);
*/
return skb->data;
}
/*--------------------------------------------------------------------------------------*/
inline void RxBufFree(TI_HANDLE hOs, void *pBuf)
{
unsigned char *pdata = (unsigned char *)((TI_UINT32)pBuf & ~(TI_UINT32)0x3);
rx_head_t *rx_head = (rx_head_t *)(pdata - WSPI_PAD_BYTES - RX_HEAD_LEN_ALIGNED);
struct sk_buff *skb = rx_head->skb;
#ifdef TI_DBG
if ((TI_UINT32)pBuf & 0x3)
{
if ((TI_UINT32)pBuf - (TI_UINT32)skb->data != 2)
{
printk("RxBufFree() address error skb=0x%x skb->data=0x%x pPacket=0x%x !!!\n",(int)skb, (int)skb->data, (int)pBuf);
}
}
else
{
if ((TI_UINT32)skb->data != (TI_UINT32)pBuf)
{
printk("RxBufFree() address error skb=0x%x skb->data=0x%x pPacket=0x%x !!!\n",(int)skb, (int)skb->data, (int)pBuf);
}
}
#endif
/*
printk("-->> RxBufFree() skb=0x%x skb->data=0x%x skb->head=0x%x skb->len=%d\n",
(int)skb, (int)skb->data, (int)skb->head, (int)skb->len);
*/
dev_kfree_skb(skb);
}
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