| /* |
| * 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); |
| } |
