1981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt/* 2981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * RxBuf.c 3981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * 4981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved. 5981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * All rights reserved. 6981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * 7981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * Redistribution and use in source and binary forms, with or without 8981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * modification, are permitted provided that the following conditions 9981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * are met: 10981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * 11981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * * Redistributions of source code must retain the above copyright 12981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * notice, this list of conditions and the following disclaimer. 13981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * * Redistributions in binary form must reproduce the above copyright 14981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * notice, this list of conditions and the following disclaimer in 15981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * the documentation and/or other materials provided with the 16981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * distribution. 17981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * * Neither the name Texas Instruments nor the names of its 18981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * contributors may be used to endorse or promote products derived 19981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * from this software without specific prior written permission. 20981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * 21981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt */ 33981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt 34981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt 35981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt/** \file buf.c 36981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * \brief Linux buf implementation. 37981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * 38981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * \see 39981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt */ 40981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt 41981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt#include "tidef.h" 42981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt#include "RxBuf_linux.h" 43981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt#include <linux/netdevice.h> 44981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt/*--------------------------------------------------------------------------------------*/ 45981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt/* 46981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * Allocate BUF Rx packets. 47981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt * Add 16 bytes before the data buffer for WSPI overhead! 48981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt */ 4977a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidtvoid *RxBufAlloc(TI_HANDLE hOs, TI_UINT32 len,PacketClassTag_e ePacketClassTag) 50981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt{ 5177a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt TI_UINT32 alloc_len = len + WSPI_PAD_BYTES + PAYLOAD_ALIGN_PAD_BYTES + RX_HEAD_LEN_ALIGNED; 5277a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt struct sk_buff *skb; 5377a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt rx_head_t *rx_head; 54981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt 5577a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt skb = alloc_skb(alloc_len, GFP_ATOMIC); 5677a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt if (!skb) 5777a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt return NULL; 5877a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt rx_head = (rx_head_t *)skb->head; 59981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt rx_head->skb = skb; 6077a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt skb_reserve(skb, RX_HEAD_LEN_ALIGNED + WSPI_PAD_BYTES); 61981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt/* 62981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt printk("-->> RxBufAlloc(len=%d) skb=0x%x skb->data=0x%x skb->head=0x%x skb->len=%d\n", 63981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt (int)len, (int)skb, (int)skb->data, (int)skb->head, (int)skb->len); 64981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt*/ 65981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt return skb->data; 66981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt 67981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt} 68981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt 69981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt/*--------------------------------------------------------------------------------------*/ 70981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt 7177a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidtinline void RxBufFree(TI_HANDLE hOs, void *pBuf) 72981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt{ 7377a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt unsigned char *pdata = (unsigned char *)((TI_UINT32)pBuf & ~(TI_UINT32)0x3); 74981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt rx_head_t *rx_head = (rx_head_t *)(pdata - WSPI_PAD_BYTES - RX_HEAD_LEN_ALIGNED); 75981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt struct sk_buff *skb = rx_head->skb; 76981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt 77981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt#ifdef TI_DBG 7877a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt if ((TI_UINT32)pBuf & 0x3) 7977a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt { 8077a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt if ((TI_UINT32)pBuf - (TI_UINT32)skb->data != 2) 8177a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt { 8277a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt printk("RxBufFree() address error skb=0x%x skb->data=0x%x pPacket=0x%x !!!\n",(int)skb, (int)skb->data, (int)pBuf); 8377a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt } 8477a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt } 8577a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt else 8677a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt { 8777a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt if ((TI_UINT32)skb->data != (TI_UINT32)pBuf) 8877a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt { 8977a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt printk("RxBufFree() address error skb=0x%x skb->data=0x%x pPacket=0x%x !!!\n",(int)skb, (int)skb->data, (int)pBuf); 9077a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt } 9177a78b11a0b8e7c1a5b1625e0fddd39ef3a9e224Dmitry Shmidt } 92981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt#endif 93981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt/* 94981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt printk("-->> RxBufFree() skb=0x%x skb->data=0x%x skb->head=0x%x skb->len=%d\n", 95981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt (int)skb, (int)skb->data, (int)skb->head, (int)skb->len); 96981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt*/ 97981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt dev_kfree_skb(skb); 98981801b95b81e6d1c7a2085967406e86af0f08fcDmitry Shmidt} 99