patch-2.3.29 linux/drivers/net/sk98lin/h/skcsum.h

• Lines: 224
• Date: Tue Nov 23 10:15:42 1999
• Orig file: v2.3.28/linux/drivers/net/sk98lin/h/skcsum.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.28/linux/drivers/net/sk98lin/h/skcsum.h linux/drivers/net/sk98lin/h/skcsum.h
@@ -0,0 +1,223 @@
+/******************************************************************************
+ *
+ * Name:	skcsum.h
+ * Project:	GEnesis, PCI Gigabit Ethernet Adapter
+ * Version:	$Revision: 1.2 $
+ * Date:	$Date: 1998/09/04 12:16:34 $
+ * Purpose:	Store/verify Internet checksum in send/receive packets.
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ *	(C)Copyright 1998,1999 SysKonnect,
+ *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	The information in this file is provided "AS IS" without warranty.
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ * History:
+ *
+ *	$Log: skcsum.h,v $
+ *	Revision 1.2  1998/09/04 12:16:34  mhaveman
+ *	Checked in for Stephan to allow compilation.
+ *	-Added definition SK_CSUM_EVENT_CLEAR_PROTO_STATS to clear statistic
+ *	-Added prototype for SkCsEvent()
+ *	
+ *	Revision 1.1  1998/09/01 15:36:53  swolf
+ *	initial revision
+ *
+ *	01-Sep-1998 sw	Created.
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ * Description:
+ *
+ * Public header file for the "GEnesis" common module "CSUM".
+ *
+ * "GEnesis" is an abbreviation of "Gigabit Ethernet Network System in Silicon"
+ * and is the code name of this SysKonnect project.
+ *
+ * Compilation Options:
+ *
+ *	SK_USE_CSUM - Define if CSUM is to be used. Otherwise, CSUM will be an
+ *	empty module.
+ *
+ *	SKCS_OVERWRITE_PROTO - Define to overwrite the default protocol id
+ *	definitions. In this case, all SKCS_PROTO_xxx definitions must be made
+ *	external.
+ *
+ *	SKCS_OVERWRITE_STATUS - Define to overwrite the default return status
+ *	definitions. In this case, all SKCS_STATUS_xxx definitions must be made
+ *	external.
+ *
+ * Include File Hierarchy:
+ *
+ *	"h/skcsum.h"
+ *	 "h/sktypes.h"
+ *	 "h/skqueue.h"
+ *
+ ******************************************************************************/
+
+#ifndef __INC_SKCSUM_H
+#define __INC_SKCSUM_H
+
+#include "h/sktypes.h"
+#include "h/skqueue.h"
+
+/* defines ********************************************************************/
+
+/*
+ * Define the default bit flags for 'SKCS_PACKET_INFO.ProtocolFlags'  if no user
+ * overwrite.
+ */
+#ifndef SKCS_OVERWRITE_PROTO	/* User overwrite? */
+#define SKCS_PROTO_IP	0x1	/* IP (Internet Protocol version 4) */
+#define SKCS_PROTO_TCP	0x2	/* TCP (Transmission Control Protocol) */
+#define SKCS_PROTO_UDP	0x4	/* UDP (User Datagram Protocol) */
+
+/* Indices for protocol statistics. */
+#define SKCS_PROTO_STATS_IP	0
+#define SKCS_PROTO_STATS_UDP	1
+#define SKCS_PROTO_STATS_TCP	2
+#define SKCS_NUM_PROTOCOLS	3	/* Number of supported protocols. */
+#endif	/* !SKCS_OVERWRITE_PROTO */
+
+/*
+ * Define the default SKCS_STATUS type and values if no user overwrite.
+ *
+ *	SKCS_STATUS_UNKNOWN_IP_VERSION - Not an IP v4 frame.
+ *	SKCS_STATUS_IP_CSUM_ERROR - IP checksum error.
+ *	SKCS_STATUS_IP_FRAGMENT - IP fragment (IP checksum ok).
+ *	SKCS_STATUS_IP_CSUM_OK - IP checksum ok (not a TCP or UDP frame).
+ *	SKCS_STATUS_TCP_CSUM_ERROR - TCP checksum error (IP checksum ok).
+ *	SKCS_STATUS_UDP_CSUM_ERROR - UDP checksum error (IP checksum ok).
+ *	SKCS_STATUS_TCP_CSUM_OK - IP and TCP checksum ok.
+ *	SKCS_STATUS_UDP_CSUM_OK - IP and UDP checksum ok.
+ */
+#ifndef SKCS_OVERWRITE_STATUS	/* User overwrite? */
+#define SKCS_STATUS	int	/* Define status type. */
+
+#define SKCS_STATUS_UNKNOWN_IP_VERSION	1
+#define SKCS_STATUS_IP_CSUM_ERROR	2
+#define SKCS_STATUS_IP_FRAGMENT		3
+#define SKCS_STATUS_IP_CSUM_OK		4
+#define SKCS_STATUS_TCP_CSUM_ERROR	5
+#define SKCS_STATUS_UDP_CSUM_ERROR	6
+#define SKCS_STATUS_TCP_CSUM_OK		7
+#define SKCS_STATUS_UDP_CSUM_OK		8
+#endif	/* !SKCS_OVERWRITE_STATUS */
+
+/* Clear protocol statistics event. */
+#define SK_CSUM_EVENT_CLEAR_PROTO_STATS	1
+
+/*
+ * Add two values in one's complement.
+ *
+ * Note: One of the two input values may be "longer" than 16-bit, but then the
+ * resulting sum may be 17 bits long. In this case, add zero to the result using
+ * SKCS_OC_ADD() again.
+ *
+ *	Result = Value1 + Value2
+ */
+#define SKCS_OC_ADD(Result, Value1, Value2) {				\
+	unsigned long Sum;						\
+									\
+	Sum = (unsigned long) (Value1) + (unsigned long) (Value2);	\
+	/* Add-in any carry. */						\
+	(Result) = (Sum & 0xffff) + (Sum >> 16);			\
+}
+
+/*
+ * Subtract two values in one's complement.
+ *
+ *	Result = Value1 - Value2
+ */
+#define SKCS_OC_SUB(Result, Value1, Value2)	\
+	SKCS_OC_ADD((Result), (Value1), ~(Value2) & 0xffff)
+
+/* typedefs *******************************************************************/
+
+/*
+ * SKCS_PROTO_STATS - The CSUM protocol statistics structure.
+ *
+ * There is one instance of this structure for each protocol supported.
+ */
+typedef struct s_CsProtocolStatistics {
+	SK_U64 RxOkCts;		/* Receive checksum ok. */
+	SK_U64 RxUnableCts;	/* Unable to verify receive checksum. */
+	SK_U64 RxErrCts;	/* Receive checksum error. */
+	SK_U64 TxOkCts;		/* Transmit checksum ok. */
+	SK_U64 TxUnableCts;	/* Unable to verify transmit checksum. */
+} SKCS_PROTO_STATS;
+
+/*
+ * s_Csum - The CSUM module context structure.
+ */
+typedef struct s_Csum {
+	/* Enabled receive SK_PROTO_XXX bit flags. */
+	unsigned ReceiveFlags;
+
+	/* The protocol statistics structure; one per supported protocol. */
+	SKCS_PROTO_STATS ProtoStats[SKCS_NUM_PROTOCOLS];
+} SK_CSUM;
+
+/*
+ * SKCS_PACKET_INFO - The packet information structure.
+ */
+typedef struct s_CsPacketInfo {
+	/* Bit field specifiying the desired/found protocols. */
+	unsigned ProtocolFlags;
+
+	/* Length of complete IP header, including any option fields. */
+	unsigned IpHeaderLength;
+
+	/* IP header checksum. */
+	unsigned IpHeaderChecksum;
+
+	/* TCP/UDP pseudo header checksum. */
+	unsigned PseudoHeaderChecksum;
+} SKCS_PACKET_INFO;
+
+/* function prototypes ********************************************************/
+
+#ifndef SkCsCalculateChecksum
+extern unsigned SkCsCalculateChecksum(
+	void		*pData,
+	unsigned	Length);
+#endif
+
+extern int SkCsEvent(
+	SK_AC		*pAc,
+	SK_IOC		Ioc,
+	SK_U32		Event,
+	SK_EVPARA	Param);
+
+extern SKCS_STATUS SkCsGetReceiveInfo(
+	SK_AC		*pAc,
+	void		*pIpHeader,
+	unsigned	Checksum1,
+	unsigned	Checksum2);
+
+extern void SkCsGetSendInfo(
+	SK_AC			*pAc,
+	void			*pIpHeader,
+	SKCS_PACKET_INFO	*pPacketInfo);
+
+extern void SkCsSetReceiveFlags(
+	SK_AC		*pAc,
+	unsigned	ReceiveFlags,
+	unsigned	*pChecksum1Offset,
+	unsigned	*pChecksum2Offset);
+
+#endif	/* __INC_SKCSUM_H */