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/*
* wbuf.h
*
* 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.
*/
/***************************************************************************/
/* */
/* MODULE: wbuf.h */
/* PURPOSE: manages the allocation/free and field access of the WBUF */
/* */
/***************************************************************************/
#ifndef _WBUF_H_
#define _WBUF_H_
#include <linux/version.h>
#include <linux/skbuff.h>
#include "tidef.h"
#include "queue.h"
typedef void WBUF;
/* Packet types */
typedef enum
{
TX_PKT_TYPE_MGMT = 0x01,
TX_PKT_TYPE_EAPOL = 0x02,
TX_PKT_TYPE_ETHER = 0x04, /* Data packets from the Network interface. */
TX_PKT_TYPE_WLAN_DATA = 0x08 /* Currently includes Null and IAPP packets. */
} TX_PKT_TYPE;
#define TX_PKT_FLAGS_LINK_TEST 0x1 /* Tx-Packet-Flag */
#define WSPI_PAD_BYTES 16 /* Add padding before data buffer for WSPI overhead */
/* user callback definition (in tx complete) */
typedef void *CB_ARG;
typedef void (*CB_FUNC)(CB_ARG cb_arg);
/*
* wbuf user fields:
*/
typedef struct
{
TQueNodeHdr queNodeHdr; /* The header used for queueing the WBUF */
TX_PKT_TYPE pktType; /* wbuf packet type */
CB_FUNC cb_func; /* callback function to use in tx complete */
CB_ARG cb_arg; /* callback argument to use in tx complete */
TI_UINT8 Tid; /* WLAN TID (traffic identity) */
TI_UINT8 hdrLen; /* WLAN header length, not including alignment pad. */
TI_UINT8 flags; /* Some application flags, see Tx-Packet-Flags defs above. */
} WBUF_PARAMS;
#define WBUF_DATA(pWbuf) ( ((struct sk_buff *)(pWbuf))->data )
#define WBUF_LEN(pWbuf) ( ((struct sk_buff *)(pWbuf))->len )
#define WBUF_PRIORITY(pWbuf) ( ((struct sk_buff *)(pWbuf))->priority )
#define WBUF_DEV(pWbuf) ( ((struct sk_buff *)(pWbuf))->dev )
#define WBUF_DEV_SET(pWbuf,pDev) ( ((struct sk_buff *)(pWbuf))->dev) = ((struct net_device *)(pDev))
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
#define WBUF_STAMP(pWbuf) ( ((struct sk_buff *)(pWbuf))->tstamp.off_usec )
#else
#define WBUF_STAMP(pWbuf) ( ((struct sk_buff *)(pWbuf))->tstamp.tv.nsec )
#endif
#define WBUF_CB(pWbuf) ( ((struct sk_buff *)(pWbuf))->cb )
#define WBUF_PKT_TYPE(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->pktType )
#define WBUF_CB_FUNC(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->cb_func )
#define WBUF_CB_ARG(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->cb_arg )
#define WBUF_TID(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->Tid )
#define WBUF_HDR_LEN(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->hdrLen )
#define WBUF_FLAGS(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->flags )
/* The offset of the node-header field from the WBUF entry (for queueing) */
#define WBUF_NODE_HDR_OFFSET \
( (unsigned long) &( ( (WBUF_PARAMS *) &( ( (struct sk_buff *)0 )->cb ) )->queNodeHdr ) )
/*
* Allocate WBUF for Tx/Rx packets.
* Add 16 bytes before the data buffer for WSPI overhead!
*/
static inline WBUF *WbufAlloc (TI_HANDLE hOs, TI_UINT32 len)
{
gfp_t flags = (in_atomic()) ? GFP_ATOMIC : GFP_KERNEL;
WBUF *pWbuf = alloc_skb(len + WSPI_PAD_BYTES, flags);
if (!pWbuf)
{
return NULL;
}
WBUF_DATA (pWbuf) += WSPI_PAD_BYTES;
return pWbuf;
}
#define WbufFree(hOs, pWbuf) ( dev_kfree_skb((struct sk_buff *)pWbuf) )
#define WbufReserve(hOs, pWbuf,len) ( skb_reserve((struct sk_buff *)pWbuf,(int)len) )
#endif
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