1 /* 2 * wbuf.h 3 * 4 * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name Texas Instruments nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 35 /***************************************************************************/ 36 /* */ 37 /* MODULE: wbuf.h */ 38 /* PURPOSE: manages the allocation/free and field access of the WBUF */ 39 /* */ 40 /***************************************************************************/ 41 #ifndef _WBUF_H_ 42 #define _WBUF_H_ 43 44 #include <linux/version.h> 45 #include <linux/skbuff.h> 46 #include "tidef.h" 47 #include "queue.h" 48 49 typedef void WBUF; 50 51 /* Packet types */ 52 typedef enum 53 { 54 TX_PKT_TYPE_MGMT = 0x01, 55 TX_PKT_TYPE_EAPOL = 0x02, 56 TX_PKT_TYPE_ETHER = 0x04, /* Data packets from the Network interface. */ 57 TX_PKT_TYPE_WLAN_DATA = 0x08 /* Currently includes Null and IAPP packets. */ 58 } TX_PKT_TYPE; 59 60 #define TX_PKT_FLAGS_LINK_TEST 0x1 /* Tx-Packet-Flag */ 61 #define WSPI_PAD_BYTES 16 /* Add padding before data buffer for WSPI overhead */ 62 63 /* user callback definition (in tx complete) */ 64 typedef void *CB_ARG; 65 typedef void (*CB_FUNC)(CB_ARG cb_arg); 66 67 /* 68 * wbuf user fields: 69 */ 70 typedef struct 71 { 72 TQueNodeHdr queNodeHdr; /* The header used for queueing the WBUF */ 73 TX_PKT_TYPE pktType; /* wbuf packet type */ 74 CB_FUNC cb_func; /* callback function to use in tx complete */ 75 CB_ARG cb_arg; /* callback argument to use in tx complete */ 76 TI_UINT8 Tid; /* WLAN TID (traffic identity) */ 77 TI_UINT8 hdrLen; /* WLAN header length, not including alignment pad. */ 78 TI_UINT8 flags; /* Some application flags, see Tx-Packet-Flags defs above. */ 79 } WBUF_PARAMS; 80 81 82 83 #define WBUF_DATA(pWbuf) ( ((struct sk_buff *)(pWbuf))->data ) 84 #define WBUF_LEN(pWbuf) ( ((struct sk_buff *)(pWbuf))->len ) 85 #define WBUF_PRIORITY(pWbuf) ( ((struct sk_buff *)(pWbuf))->priority ) 86 #define WBUF_DEV(pWbuf) ( ((struct sk_buff *)(pWbuf))->dev ) 87 #define WBUF_DEV_SET(pWbuf,pDev) ( ((struct sk_buff *)(pWbuf))->dev) = ((struct net_device *)(pDev)) 88 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23) 89 #define WBUF_STAMP(pWbuf) ( ((struct sk_buff *)(pWbuf))->tstamp.off_usec ) 90 #else 91 #define WBUF_STAMP(pWbuf) ( ((struct sk_buff *)(pWbuf))->tstamp.tv.nsec ) 92 #endif 93 #define WBUF_CB(pWbuf) ( ((struct sk_buff *)(pWbuf))->cb ) 94 #define WBUF_PKT_TYPE(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->pktType ) 95 #define WBUF_CB_FUNC(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->cb_func ) 96 #define WBUF_CB_ARG(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->cb_arg ) 97 #define WBUF_TID(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->Tid ) 98 #define WBUF_HDR_LEN(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->hdrLen ) 99 #define WBUF_FLAGS(pWbuf) ( ((WBUF_PARAMS *)&(WBUF_CB(pWbuf)))->flags ) 100 101 /* The offset of the node-header field from the WBUF entry (for queueing) */ 102 #define WBUF_NODE_HDR_OFFSET \ 103 ( (unsigned long) &( ( (WBUF_PARAMS *) &( ( (struct sk_buff *)0 )->cb ) )->queNodeHdr ) ) 104 105 /* 106 * Allocate WBUF for Tx/Rx packets. 107 * Add 16 bytes before the data buffer for WSPI overhead! 108 */ 109 static inline WBUF *WbufAlloc (TI_HANDLE hOs, TI_UINT32 len) 110 { 111 gfp_t flags = (in_atomic()) ? GFP_ATOMIC : GFP_KERNEL; 112 WBUF *pWbuf = alloc_skb(len + WSPI_PAD_BYTES, flags); 113 114 if (!pWbuf) 115 { 116 return NULL; 117 } 118 WBUF_DATA (pWbuf) += WSPI_PAD_BYTES; 119 return pWbuf; 120 } 121 122 #define WbufFree(hOs, pWbuf) ( dev_kfree_skb((struct sk_buff *)pWbuf) ) 123 #define WbufReserve(hOs, pWbuf,len) ( skb_reserve((struct sk_buff *)pWbuf,(int)len) ) 124 125 #endif 126
