drivers/net : move net drivers to drivers/net

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 0 insertions, 929 deletions

diff --git a/drivers/sk98lin/skcsum.c b/drivers/sk98lin/skcsum.c
deleted file mode 100644
index a5dc572587..0000000000
--- a/drivers/sk98lin/skcsum.c
+++ /dev/null
@@ -1,929 +0,0 @@
-/******************************************************************************
- *
- * Name:	skcsum.c
- * Project:	GEnesis, PCI Gigabit Ethernet Adapter
- * Version:	$Revision: 1.10 $
- * Date:	$Date: 2002/04/11 10:02:04 $
- * Purpose:	Store/verify Internet checksum in send/receive packets.
- *
- ******************************************************************************/
-
-/******************************************************************************
- *
- *	(C)Copyright 1998-2001 SysKonnect 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.c,v $
- *	Revision 1.10  2002/04/11 10:02:04  rwahl
- *	Fix in SkCsGetSendInfo():
- *	- function did not return ProtocolFlags in every case.
- *	- pseudo header csum calculated wrong for big endian.
- *
- *	Revision 1.9  2001/06/13 07:42:08  gklug
- *	fix: NetNumber was wrong in CLEAR_STAT event
- *	add: check for good NetNumber in Clear STAT
- *
- *	Revision 1.8  2001/02/06 11:15:36  rassmann
- *	Supporting two nets on dual-port adapters.
- *
- *	Revision 1.7  2000/06/29 13:17:05  rassmann
- *	Corrected reception of a packet with UDP checksum == 0 (which means there
- *	is no UDP checksum).
- *
- *	Revision 1.6  2000/02/21 12:35:10  cgoos
- *	Fixed license header comment.
- *
- *	Revision 1.5  2000/02/21 11:05:19  cgoos
- *	Merged changes back to common source.
- *	Fixed rx path for BIG ENDIAN architecture.
- *
- *	Revision 1.1  1999/07/26 15:28:12  mkarl
- *	added return SKCS_STATUS_IP_CSUM_ERROR_UDP and
- *	SKCS_STATUS_IP_CSUM_ERROR_TCP to pass the NidsTester
- *	changed from common source to windows specific source
- *	therefore restarting with v1.0
- *
- *	Revision 1.3  1999/05/10 08:39:33  mkarl
- *	prevent overflows in SKCS_HTON16
- *	fixed a bug in pseudo header checksum calculation
- *	added some comments
- *
- *	Revision 1.2  1998/10/22 11:53:28  swolf
- *	Now using SK_DBG_MSG.
- *
- *	Revision 1.1  1998/09/01 15:35:41  swolf
- *	initial revision
- *
- *	13-May-1998 sw	Created.
- *
- ******************************************************************************/
-
-#include <config.h>
-
-#ifdef CONFIG_SK98
-
-#ifdef SK_USE_CSUM	/* Check if CSUM is to be used. */
-
-#ifndef lint
-static const char SysKonnectFileId[] = "@(#)"
-	"$Id: skcsum.c,v 1.10 2002/04/11 10:02:04 rwahl Exp $"
-	" (C) SysKonnect.";
-#endif	/* !lint */
-
-/******************************************************************************
- *
- * Description:
- *
- * This is the "GEnesis" common module "CSUM".
- *
- * This module contains the code necessary to calculate, store, and verify the
- * Internet Checksum of IP, TCP, and UDP frames.
- *
- * "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/skdrv1st.h"
- *	"h/skcsum.h"
- *	 "h/sktypes.h"
- *	 "h/skqueue.h"
- *	"h/skdrv2nd.h"
- *
- ******************************************************************************/
-
-#include "h/skdrv1st.h"
-#include "h/skcsum.h"
-#include "h/skdrv2nd.h"
-
-/* defines ********************************************************************/
-
-/* The size of an Ethernet MAC header. */
-#define SKCS_ETHERNET_MAC_HEADER_SIZE			(6+6+2)
-
-/* The size of the used topology's MAC header. */
-#define	SKCS_MAC_HEADER_SIZE	SKCS_ETHERNET_MAC_HEADER_SIZE
-
-/* The size of the IP header without any option fields. */
-#define SKCS_IP_HEADER_SIZE						20
-
-/*
- * Field offsets within the IP header.
- */
-
-/* "Internet Header Version" and "Length". */
-#define SKCS_OFS_IP_HEADER_VERSION_AND_LENGTH	0
-
-/* "Total Length". */
-#define SKCS_OFS_IP_TOTAL_LENGTH				2
-
-/* "Flags" "Fragment Offset". */
-#define SKCS_OFS_IP_FLAGS_AND_FRAGMENT_OFFSET	6
-
-/* "Next Level Protocol" identifier. */
-#define SKCS_OFS_IP_NEXT_LEVEL_PROTOCOL			9
-
-/* Source IP address. */
-#define SKCS_OFS_IP_SOURCE_ADDRESS				12
-
-/* Destination IP address. */
-#define SKCS_OFS_IP_DESTINATION_ADDRESS			16
-
-
-/*
- * Field offsets within the UDP header.
- */
-
-/* UDP checksum. */
-#define SKCS_OFS_UDP_CHECKSUM					6
-
-/* IP "Next Level Protocol" identifiers (see RFC 790). */
-#define SKCS_PROTO_ID_TCP		6	/* Transport Control Protocol */
-#define SKCS_PROTO_ID_UDP		17	/* User Datagram Protocol */
-
-/* IP "Don't Fragment" bit. */
-#define SKCS_IP_DONT_FRAGMENT	SKCS_HTON16(0x4000)
-
-/* Add a byte offset to a pointer. */
-#define SKCS_IDX(pPtr, Ofs)	((void *) ((char *) (pPtr) + (Ofs)))
-
-/*
- * Macros that convert host to network representation and vice versa, i.e.
- * little/big endian conversion on little endian machines only.
- */
-#ifdef SK_LITTLE_ENDIAN
-#define SKCS_HTON16(Val16)	(((unsigned) (Val16) >> 8) | (((Val16) & 0xFF) << 8))
-#endif	/* SK_LITTLE_ENDIAN */
-#ifdef SK_BIG_ENDIAN
-#define SKCS_HTON16(Val16)	(Val16)
-#endif	/* SK_BIG_ENDIAN */
-#define SKCS_NTOH16(Val16)	SKCS_HTON16(Val16)
-
-/* typedefs *******************************************************************/
-
-/* function prototypes ********************************************************/
-
-/******************************************************************************
- *
- *	SkCsGetSendInfo - get checksum information for a send packet
- *
- * Description:
- *	Get all checksum information necessary to send a TCP or UDP packet. The
- *	function checks the IP header passed to it. If the high-level protocol
- *	is either TCP or UDP the pseudo header checksum is calculated and
- *	returned.
- *
- *	The function returns the total length of the IP header (including any
- *	IP option fields), which is the same as the start offset of the IP data
- *	which in turn is the start offset of the TCP or UDP header.
- *
- *	The function also returns the TCP or UDP pseudo header checksum, which
- *	should be used as the start value for the hardware checksum calculation.
- *	(Note that any actual pseudo header checksum can never calculate to
- *	zero.)
- *
- * Note:
- *	There is a bug in the ASIC which may lead to wrong checksums.
- *
- * Arguments:
- *	pAc - A pointer to the adapter context struct.
- *
- *	pIpHeader - Pointer to IP header. Must be at least the IP header *not*
- *	including any option fields, i.e. at least 20 bytes.
- *
- *	Note: This pointer will be used to address 8-, 16-, and 32-bit
- *	variables with the respective alignment offsets relative to the pointer.
- *	Thus, the pointer should point to a 32-bit aligned address. If the
- *	target system cannot address 32-bit variables on non 32-bit aligned
- *	addresses, then the pointer *must* point to a 32-bit aligned address.
- *
- *	pPacketInfo - A pointer to the packet information structure for this
- *	packet. Before calling this SkCsGetSendInfo(), the following field must
- *	be initialized:
- *
- *		ProtocolFlags - Initialize with any combination of
- *		SKCS_PROTO_XXX bit flags. SkCsGetSendInfo() will only work on
- *		the protocols specified here. Any protocol(s) not specified
- *		here will be ignored.
- *
- *		Note: Only one checksum can be calculated in hardware. Thus, if
- *		SKCS_PROTO_IP is specified in the 'ProtocolFlags',
- *		SkCsGetSendInfo() must calculate the IP header checksum in
- *		software. It might be a better idea to have the calling
- *		protocol stack calculate the IP header checksum.
- *
- * Returns: N/A
- *	On return, the following fields in 'pPacketInfo' may or may not have
- *	been filled with information, depending on the protocol(s) found in the
- *	packet:
- *
- *	ProtocolFlags - Returns the SKCS_PROTO_XXX bit flags of the protocol(s)
- *	that were both requested by the caller and actually found in the packet.
- *	Protocol(s) not specified by the caller and/or not found in the packet
- *	will have their respective SKCS_PROTO_XXX bit flags reset.
- *
- *	Note: For IP fragments, TCP and UDP packet information is ignored.
- *
- *	IpHeaderLength - The total length in bytes of the complete IP header
- *	including any option fields is returned here. This is the start offset
- *	of the IP data, i.e. the TCP or UDP header if present.
- *
- *	IpHeaderChecksum - If IP has been specified in the 'ProtocolFlags', the
- *	16-bit Internet Checksum of the IP header is returned here. This value
- *	is to be stored into the packet's 'IP Header Checksum' field.
- *
- *	PseudoHeaderChecksum - If this is a TCP or UDP packet and if TCP or UDP
- *	has been specified in the 'ProtocolFlags', the 16-bit Internet Checksum
- *	of the TCP or UDP pseudo header is returned here.
- */
-#if 0
-void SkCsGetSendInfo(
-SK_AC				*pAc,			/* Adapter context struct. */
-void				*pIpHeader,		/* IP header. */
-SKCS_PACKET_INFO	*pPacketInfo,	/* Packet information struct. */
-int					NetNumber)		/* Net number */
-{
-	/* Internet Header Version found in IP header. */
-	unsigned InternetHeaderVersion;
-
-	/* Length of the IP header as found in IP header. */
-	unsigned IpHeaderLength;
-
-	/* Bit field specifiying the desired/found protocols. */
-	unsigned ProtocolFlags;
-
-	/* Next level protocol identifier found in IP header. */
-	unsigned NextLevelProtocol;
-
-	/* Length of IP data portion. */
-	unsigned IpDataLength;
-
-	/* TCP/UDP pseudo header checksum. */
-	unsigned long PseudoHeaderChecksum;
-
-	/* Pointer to next level protocol statistics structure. */
-	SKCS_PROTO_STATS *NextLevelProtoStats;
-
-	/* Temporary variable. */
-	unsigned Tmp;
-
-	Tmp = *(SK_U8 *)
-		SKCS_IDX(pIpHeader, SKCS_OFS_IP_HEADER_VERSION_AND_LENGTH);
-
-	/* Get the Internet Header Version (IHV). */
-	/* Note: The IHV is stored in the upper four bits. */
-
-	InternetHeaderVersion = Tmp >> 4;
-
-	/* Check the Internet Header Version. */
-	/* Note: We currently only support IP version 4. */
-
-	if (InternetHeaderVersion != 4) {	/* IPv4? */
-		SK_DBG_MSG(pAc, SK_DBGMOD_CSUM, SK_DBGCAT_ERR | SK_DBGCAT_TX,
-			("Tx: Unknown Internet Header Version %u.\n",
-			InternetHeaderVersion));
-		pPacketInfo->ProtocolFlags = 0;
-		pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].TxUnableCts++;
-		return;
-	}
-
-	/* Get the IP header length (IHL). */
-	/*
-	 * Note: The IHL is stored in the lower four bits as the number of
-	 * 4-byte words.
-	 */
-
-	IpHeaderLength = (Tmp & 0xf) * 4;
-	pPacketInfo->IpHeaderLength = IpHeaderLength;
-
-	/* Check the IP header length. */
-
-	/* 04-Aug-1998 sw - Really check the IHL? Necessary? */
-
-	if (IpHeaderLength < 5*4) {
-		SK_DBG_MSG(pAc, SK_DBGMOD_CSUM, SK_DBGCAT_ERR | SK_DBGCAT_TX,
-			("Tx: Invalid IP Header Length %u.\n", IpHeaderLength));
-		pPacketInfo->ProtocolFlags = 0;
-		pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].TxUnableCts++;
-		return;
-	}
-
-	/* This is an IPv4 frame with a header of valid length. */
-
-	pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].TxOkCts++;
-
-	/* Check if we should calculate the IP header checksum. */
-
-	ProtocolFlags = pPacketInfo->ProtocolFlags;
-
-	if (ProtocolFlags & SKCS_PROTO_IP) {
-		pPacketInfo->IpHeaderChecksum =
-			SkCsCalculateChecksum(pIpHeader, IpHeaderLength);
-	}
-
-	/* Get the next level protocol identifier. */
-
-	NextLevelProtocol =
-		*(SK_U8 *) SKCS_IDX(pIpHeader, SKCS_OFS_IP_NEXT_LEVEL_PROTOCOL);
-
-	/*
-	 * Check if this is a TCP or UDP frame and if we should calculate the
-	 * TCP/UDP pseudo header checksum.
-	 *
-	 * Also clear all protocol bit flags of protocols not present in the
-	 * frame.
-	 */
-
-	if ((ProtocolFlags & SKCS_PROTO_TCP) != 0 &&
-		NextLevelProtocol == SKCS_PROTO_ID_TCP) {
-		/* TCP/IP frame. */
-		ProtocolFlags &= SKCS_PROTO_TCP | SKCS_PROTO_IP;
-		NextLevelProtoStats =
-			&pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_TCP];
-	}
-	else if ((ProtocolFlags & SKCS_PROTO_UDP) != 0 &&
-		NextLevelProtocol == SKCS_PROTO_ID_UDP) {
-		/* UDP/IP frame. */
-		ProtocolFlags &= SKCS_PROTO_UDP | SKCS_PROTO_IP;
-		NextLevelProtoStats =
-			&pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_UDP];
-	}
-	else {
-		/*
-		 * Either not a TCP or UDP frame and/or TCP/UDP processing not
-		 * specified.
-		 */
-		pPacketInfo->ProtocolFlags = ProtocolFlags & SKCS_PROTO_IP;
-		return;
-	}
-
-	/* Check if this is an IP fragment. */
-
-	/*
-	 * Note: An IP fragment has a non-zero "Fragment Offset" field and/or
-	 * the "More Fragments" bit set. Thus, if both the "Fragment Offset"
-	 * and the "More Fragments" are zero, it is *not* a fragment. We can
-	 * easily check both at the same time since they are in the same 16-bit
-	 * word.
-	 */
-
-	if ((*(SK_U16 *)
-		SKCS_IDX(pIpHeader, SKCS_OFS_IP_FLAGS_AND_FRAGMENT_OFFSET) &
-		~SKCS_IP_DONT_FRAGMENT) != 0) {
-		/* IP fragment; ignore all other protocols. */
-		pPacketInfo->ProtocolFlags = ProtocolFlags & SKCS_PROTO_IP;
-		NextLevelProtoStats->TxUnableCts++;
-		return;
-	}
-
-	/*
-	 * Calculate the TCP/UDP pseudo header checksum.
-	 */
-
-	/* Get total length of IP header and data. */
-
-	IpDataLength =
-		*(SK_U16 *) SKCS_IDX(pIpHeader, SKCS_OFS_IP_TOTAL_LENGTH);
-
-	/* Get length of IP data portion. */
-
-	IpDataLength = SKCS_NTOH16(IpDataLength) - IpHeaderLength;
-
-	/* Calculate the sum of all pseudo header fields (16-bit). */
-
-	PseudoHeaderChecksum =
-		(unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
-			SKCS_OFS_IP_SOURCE_ADDRESS + 0) +
-		(unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
-			SKCS_OFS_IP_SOURCE_ADDRESS + 2) +
-		(unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
-			SKCS_OFS_IP_DESTINATION_ADDRESS + 0) +
-		(unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
-			SKCS_OFS_IP_DESTINATION_ADDRESS + 2) +
-		(unsigned long) SKCS_HTON16(NextLevelProtocol) +
-		(unsigned long) SKCS_HTON16(IpDataLength);
-
-	/* Add-in any carries. */
-
-	SKCS_OC_ADD(PseudoHeaderChecksum, PseudoHeaderChecksum, 0);
-
-	/* Add-in any new carry. */
-
-	SKCS_OC_ADD(pPacketInfo->PseudoHeaderChecksum, PseudoHeaderChecksum, 0);
-
-	pPacketInfo->ProtocolFlags = ProtocolFlags;
-	NextLevelProtoStats->TxOkCts++;	/* Success. */
-}	/* SkCsGetSendInfo */
-
-
-/******************************************************************************
- *
- *	SkCsGetReceiveInfo - verify checksum information for a received packet
- *
- * Description:
- *	Verify a received frame's checksum. The function returns a status code
- *	reflecting the result of the verification.
- *
- * Note:
- *	Before calling this function you have to verify that the frame is
- *	not padded and Checksum1 and Checksum2 are bigger than 1.
- *
- * Arguments:
- *	pAc - Pointer to adapter context struct.
- *
- *	pIpHeader - Pointer to IP header. Must be at least the length in bytes
- *	of the received IP header including any option fields. For UDP packets,
- *	8 additional bytes are needed to access the UDP checksum.
- *
- *	Note: The actual length of the IP header is stored in the lower four
- *	bits of the first octet of the IP header as the number of 4-byte words,
- *	so it must be multiplied by four to get the length in bytes. Thus, the
- *	maximum IP header length is 15 * 4 = 60 bytes.
- *
- *	Checksum1 - The first 16-bit Internet Checksum calculated by the
- *	hardware starting at the offset returned by SkCsSetReceiveFlags().
- *
- *	Checksum2 - The second 16-bit Internet Checksum calculated by the
- *	hardware starting at the offset returned by SkCsSetReceiveFlags().
- *
- * Returns:
- *	SKCS_STATUS_UNKNOWN_IP_VERSION - Not an IP v4 frame.
- *	SKCS_STATUS_IP_CSUM_ERROR - IP checksum error.
- *	SKCS_STATUS_IP_CSUM_ERROR_TCP - IP checksum error in TCP frame.
- *	SKCS_STATUS_IP_CSUM_ERROR_UDP - IP checksum error in UDP frame
- *	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.
- *	SKCS_STATUS_IP_CSUM_OK_NO_UDP - IP checksum OK and no UDP checksum.
- *
- *	Note: If SKCS_OVERWRITE_STATUS is defined, the SKCS_STATUS_XXX values
- *	returned here can be defined in some header file by the module using CSUM.
- *	In this way, the calling module can assign return values for its own needs,
- *	e.g. by assigning bit flags to the individual protocols.
- */
-SKCS_STATUS SkCsGetReceiveInfo(
-SK_AC		*pAc,		/* Adapter context struct. */
-void		*pIpHeader,	/* IP header. */
-unsigned	Checksum1,	/* Hardware checksum 1. */
-unsigned	Checksum2,	/* Hardware checksum 2. */
-int			NetNumber)	/* Net number */
-{
-	/* Internet Header Version found in IP header. */
-	unsigned InternetHeaderVersion;
-
-	/* Length of the IP header as found in IP header. */
-	unsigned IpHeaderLength;
-
-	/* Length of IP data portion. */
-	unsigned IpDataLength;
-
-	/* IP header checksum. */
-	unsigned IpHeaderChecksum;
-
-	/* IP header options checksum, if any. */
-	unsigned IpOptionsChecksum;
-
-	/* IP data checksum, i.e. TCP/UDP checksum. */
-	unsigned IpDataChecksum;
-
-	/* Next level protocol identifier found in IP header. */
-	unsigned NextLevelProtocol;
-
-	/* The checksum of the "next level protocol", i.e. TCP or UDP. */
-	unsigned long NextLevelProtocolChecksum;
-
-	/* Pointer to next level protocol statistics structure. */
-	SKCS_PROTO_STATS *NextLevelProtoStats;
-
-	/* Temporary variable. */
-	unsigned Tmp;
-
-	Tmp = *(SK_U8 *)
-		SKCS_IDX(pIpHeader, SKCS_OFS_IP_HEADER_VERSION_AND_LENGTH);
-
-	/* Get the Internet Header Version (IHV). */
-	/* Note: The IHV is stored in the upper four bits. */
-
-	InternetHeaderVersion = Tmp >> 4;
-
-	/* Check the Internet Header Version. */
-	/* Note: We currently only support IP version 4. */
-
-	if (InternetHeaderVersion != 4) {	/* IPv4? */
-		SK_DBG_MSG(pAc, SK_DBGMOD_CSUM, SK_DBGCAT_ERR | SK_DBGCAT_RX,
-			("Rx: Unknown Internet Header Version %u.\n",
-			InternetHeaderVersion));
-		pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].RxUnableCts++;
-		return (SKCS_STATUS_UNKNOWN_IP_VERSION);
-	}
-
-	/* Get the IP header length (IHL). */
-	/*
-	 * Note: The IHL is stored in the lower four bits as the number of
-	 * 4-byte words.
-	 */
-
-	IpHeaderLength = (Tmp & 0xf) * 4;
-
-	/* Check the IP header length. */
-
-	/* 04-Aug-1998 sw - Really check the IHL? Necessary? */
-
-	if (IpHeaderLength < 5*4) {
-		SK_DBG_MSG(pAc, SK_DBGMOD_CSUM, SK_DBGCAT_ERR | SK_DBGCAT_RX,
-			("Rx: Invalid IP Header Length %u.\n", IpHeaderLength));
-		pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].RxErrCts++;
-		return (SKCS_STATUS_IP_CSUM_ERROR);
-	}
-
-	/* This is an IPv4 frame with a header of valid length. */
-
-	/* Get the IP header and data checksum. */
-
-	IpDataChecksum = Checksum2;
-
-	/*
-	 * The IP header checksum is calculated as follows:
-	 *
-	 *	IpHeaderChecksum = Checksum1 - Checksum2
-	 */
-
-	SKCS_OC_SUB(IpHeaderChecksum, Checksum1, Checksum2);
-
-	/* Check if any IP header options. */
-
-	if (IpHeaderLength > SKCS_IP_HEADER_SIZE) {
-
-		/* Get the IP options checksum. */
-
-		IpOptionsChecksum = SkCsCalculateChecksum(
-			SKCS_IDX(pIpHeader, SKCS_IP_HEADER_SIZE),
-			IpHeaderLength - SKCS_IP_HEADER_SIZE);
-
-		/* Adjust the IP header and IP data checksums. */
-
-		SKCS_OC_ADD(IpHeaderChecksum, IpHeaderChecksum, IpOptionsChecksum);
-
-		SKCS_OC_SUB(IpDataChecksum, IpDataChecksum, IpOptionsChecksum);
-	}
-
-	/*
-	 * Check if the IP header checksum is ok.
-	 *
-	 * NOTE: We must check the IP header checksum even if the caller just wants
-	 * us to check upper-layer checksums, because we cannot do any further
-	 * processing of the packet without a valid IP checksum.
-	 */
-
-	/* Get the next level protocol identifier. */
-
-	NextLevelProtocol = *(SK_U8 *)
-		SKCS_IDX(pIpHeader, SKCS_OFS_IP_NEXT_LEVEL_PROTOCOL);
-
-	if (IpHeaderChecksum != 0xFFFF) {
-		pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].RxErrCts++;
-		/* the NDIS tester wants to know the upper level protocol too */
-		if (NextLevelProtocol == SKCS_PROTO_ID_TCP) {
-			return(SKCS_STATUS_IP_CSUM_ERROR_TCP);
-		}
-		else if (NextLevelProtocol == SKCS_PROTO_ID_UDP) {
-			return(SKCS_STATUS_IP_CSUM_ERROR_UDP);
-		}
-		return (SKCS_STATUS_IP_CSUM_ERROR);
-	}
-
-	/*
-	 * Check if this is a TCP or UDP frame and if we should calculate the
-	 * TCP/UDP pseudo header checksum.
-	 *
-	 * Also clear all protocol bit flags of protocols not present in the
-	 * frame.
-	 */
-
-	if ((pAc->Csum.ReceiveFlags[NetNumber] & SKCS_PROTO_TCP) != 0 &&
-		NextLevelProtocol == SKCS_PROTO_ID_TCP) {
-		/* TCP/IP frame. */
-		NextLevelProtoStats =
-			&pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_TCP];
-	}
-	else if ((pAc->Csum.ReceiveFlags[NetNumber] & SKCS_PROTO_UDP) != 0 &&
-		NextLevelProtocol == SKCS_PROTO_ID_UDP) {
-		/* UDP/IP frame. */
-		NextLevelProtoStats =
-			&pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_UDP];
-	}
-	else {
-		/*
-		 * Either not a TCP or UDP frame and/or TCP/UDP processing not
-		 * specified.
-		 */
-		return (SKCS_STATUS_IP_CSUM_OK);
-	}
-
-	/* Check if this is an IP fragment. */
-
-	/*
-	 * Note: An IP fragment has a non-zero "Fragment Offset" field and/or
-	 * the "More Fragments" bit set. Thus, if both the "Fragment Offset"
-	 * and the "More Fragments" are zero, it is *not* a fragment. We can
-	 * easily check both at the same time since they are in the same 16-bit
-	 * word.
-	 */
-
-	if ((*(SK_U16 *)
-		SKCS_IDX(pIpHeader, SKCS_OFS_IP_FLAGS_AND_FRAGMENT_OFFSET) &
-		~SKCS_IP_DONT_FRAGMENT) != 0) {
-		/* IP fragment; ignore all other protocols. */
-		NextLevelProtoStats->RxUnableCts++;
-		return (SKCS_STATUS_IP_FRAGMENT);
-	}
-
-	/*
-	 * 08-May-2000 ra
-	 *
-	 * From RFC 768 (UDP)
-	 * If the computed checksum is zero, it is transmitted as all ones (the
-	 * equivalent in one's complement arithmetic).  An all zero transmitted
-	 * checksum value means that the transmitter generated no checksum (for
-	 * debugging or for higher level protocols that don't care).
-	 */
-
-	if (NextLevelProtocol == SKCS_PROTO_ID_UDP &&
-		*(SK_U16*)SKCS_IDX(pIpHeader, IpHeaderLength + 6) == 0x0000) {
-
-		NextLevelProtoStats->RxOkCts++;
-
-		return (SKCS_STATUS_IP_CSUM_OK_NO_UDP);
-	}
-
-	/*
-	 * Calculate the TCP/UDP checksum.
-	 */
-
-	/* Get total length of IP header and data. */
-
-	IpDataLength =
-		*(SK_U16 *) SKCS_IDX(pIpHeader, SKCS_OFS_IP_TOTAL_LENGTH);
-
-	/* Get length of IP data portion. */
-
-	IpDataLength = SKCS_NTOH16(IpDataLength) - IpHeaderLength;
-
-	NextLevelProtocolChecksum =
-
-		/* Calculate the pseudo header checksum. */
-
-		(unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
-			SKCS_OFS_IP_SOURCE_ADDRESS + 0) +
-		(unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
-			SKCS_OFS_IP_SOURCE_ADDRESS + 2) +
-		(unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
-			SKCS_OFS_IP_DESTINATION_ADDRESS + 0) +
-		(unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
-			SKCS_OFS_IP_DESTINATION_ADDRESS + 2) +
-		(unsigned long) SKCS_HTON16(NextLevelProtocol) +
-		(unsigned long) SKCS_HTON16(IpDataLength) +
-
-		/* Add the TCP/UDP header checksum. */
-
-		(unsigned long) IpDataChecksum;
-
-	/* Add-in any carries. */
-
-	SKCS_OC_ADD(NextLevelProtocolChecksum, NextLevelProtocolChecksum, 0);
-
-	/* Add-in any new carry. */
-
-	SKCS_OC_ADD(NextLevelProtocolChecksum, NextLevelProtocolChecksum, 0);
-
-	/* Check if the TCP/UDP checksum is ok. */
-
-	if ((unsigned) NextLevelProtocolChecksum == 0xFFFF) {
-
-		/* TCP/UDP checksum ok. */
-
-		NextLevelProtoStats->RxOkCts++;
-
-		return (NextLevelProtocol == SKCS_PROTO_ID_TCP ?
-			SKCS_STATUS_TCP_CSUM_OK : SKCS_STATUS_UDP_CSUM_OK);
-	}
-
-	/* TCP/UDP checksum error. */
-
-	NextLevelProtoStats->RxErrCts++;
-
-	return (NextLevelProtocol == SKCS_PROTO_ID_TCP ?
-		SKCS_STATUS_TCP_CSUM_ERROR : SKCS_STATUS_UDP_CSUM_ERROR);
-}	/* SkCsGetReceiveInfo */
-#endif
-
-
-/******************************************************************************
- *
- *	SkCsSetReceiveFlags - set checksum receive flags
- *
- * Description:
- *	Use this function to set the various receive flags. According to the
- *	protocol flags set by the caller, the start offsets within received
- *	packets of the two hardware checksums are returned. These offsets must
- *	be stored in all receive descriptors.
- *
- * Arguments:
- *	pAc - Pointer to adapter context struct.
- *
- *	ReceiveFlags - Any combination of SK_PROTO_XXX flags of the protocols
- *	for which the caller wants checksum information on received frames.
- *
- *	pChecksum1Offset - The start offset of the first receive descriptor
- *	hardware checksum to be calculated for received frames is returned
- *	here.
- *
- *	pChecksum2Offset - The start offset of the second receive descriptor
- *	hardware checksum to be calculated for received frames is returned
- *	here.
- *
- * Returns: N/A
- *	Returns the two hardware checksum start offsets.
- */
-void SkCsSetReceiveFlags(
-SK_AC		*pAc,				/* Adapter context struct. */
-unsigned	ReceiveFlags,		/* New receive flags. */
-unsigned	*pChecksum1Offset,	/* Offset for hardware checksum 1. */
-unsigned	*pChecksum2Offset,	/* Offset for hardware checksum 2. */
-int			NetNumber)
-{
-	/* Save the receive flags. */
-
-	pAc->Csum.ReceiveFlags[NetNumber] = ReceiveFlags;
-
-	/* First checksum start offset is the IP header. */
-	*pChecksum1Offset = SKCS_MAC_HEADER_SIZE;
-
-	/*
-	 * Second checksum start offset is the IP data. Note that this may vary
-	 * if there are any IP header options in the actual packet.
-	 */
-	*pChecksum2Offset = SKCS_MAC_HEADER_SIZE + SKCS_IP_HEADER_SIZE;
-}	/* SkCsSetReceiveFlags */
-
-#ifndef SkCsCalculateChecksum
-
-/******************************************************************************
- *
- *	SkCsCalculateChecksum - calculate checksum for specified data
- *
- * Description:
- *	Calculate and return the 16-bit Internet Checksum for the specified
- *	data.
- *
- * Arguments:
- *	pData - Pointer to data for which the checksum shall be calculated.
- *	Note: The pointer should be aligned on a 16-bit boundary.
- *
- *	Length - Length in bytes of data to checksum.
- *
- * Returns:
- *	The 16-bit Internet Checksum for the specified data.
- *
- *	Note: The checksum is calculated in the machine's natural byte order,
- *	i.e. little vs. big endian. Thus, the resulting checksum is different
- *	for the same input data on little and big endian machines.
- *
- *	However, when written back to the network packet, the byte order is
- *	always in correct network order.
- */
-unsigned SkCsCalculateChecksum(
-void		*pData,		/* Data to checksum. */
-unsigned	Length)		/* Length of data. */
-{
-	SK_U16 *pU16;		/* Pointer to the data as 16-bit words. */
-	unsigned long Checksum;	/* Checksum; must be at least 32 bits. */
-
-	/* Sum up all 16-bit words. */
-
-	pU16 = (SK_U16 *) pData;
-	for (Checksum = 0; Length > 1; Length -= 2) {
-		Checksum += *pU16++;
-	}
-
-	/* If this is an odd number of bytes, add-in the last byte. */
-
-	if (Length > 0) {
-#ifdef SK_BIG_ENDIAN
-		/* Add the last byte as the high byte. */
-		Checksum += ((unsigned) *(SK_U8 *) pU16) << 8;
-#else	/* !SK_BIG_ENDIAN */
-		/* Add the last byte as the low byte. */
-		Checksum += *(SK_U8 *) pU16;
-#endif	/* !SK_BIG_ENDIAN */
-	}
-
-	/* Add-in any carries. */
-
-	SKCS_OC_ADD(Checksum, Checksum, 0);
-
-	/* Add-in any new carry. */
-
-	SKCS_OC_ADD(Checksum, Checksum, 0);
-
-	/* Note: All bits beyond the 16-bit limit are now zero. */
-
-	return ((unsigned) Checksum);
-}	/* SkCsCalculateChecksum */
-
-#endif /* SkCsCalculateChecksum */
-
-/******************************************************************************
- *
- *	SkCsEvent - the CSUM event dispatcher
- *
- * Description:
- *	This is the event handler for the CSUM module.
- *
- * Arguments:
- *	pAc - Pointer to adapter context.
- *
- *	Ioc - I/O context.
- *
- *	Event -	 Event id.
- *
- *	Param - Event dependent parameter.
- *
- * Returns:
- *	The 16-bit Internet Checksum for the specified data.
- *
- *	Note: The checksum is calculated in the machine's natural byte order,
- *	i.e. little vs. big endian. Thus, the resulting checksum is different
- *	for the same input data on little and big endian machines.
- *
- *	However, when written back to the network packet, the byte order is
- *	always in correct network order.
- */
-int SkCsEvent(
-SK_AC		*pAc,	/* Pointer to adapter context. */
-SK_IOC		Ioc,	/* I/O context. */
-SK_U32		Event,	/* Event id. */
-SK_EVPARA	Param)	/* Event dependent parameter. */
-{
-	int ProtoIndex;
-	int	NetNumber;
-
-	switch (Event) {
-	/*
-	 * Clear protocol statistics.
-	 *
-	 * Param - Protocol index, or -1 for all protocols.
-	 *		 - Net number.
-	 */
-	case SK_CSUM_EVENT_CLEAR_PROTO_STATS:
-
-		ProtoIndex = (int)Param.Para32[1];
-		NetNumber = (int)Param.Para32[0];
-		if (ProtoIndex < 0) {	/* Clear for all protocols. */
-			if (NetNumber >= 0) {
-				memset(&pAc->Csum.ProtoStats[NetNumber][0], 0,
-					sizeof(pAc->Csum.ProtoStats[NetNumber]));
-			}
-		}
-		else {					/* Clear for individual protocol. */
-			memset(&pAc->Csum.ProtoStats[NetNumber][ProtoIndex], 0,
-				sizeof(pAc->Csum.ProtoStats[NetNumber][ProtoIndex]));
-		}
-		break;
-	default:
-		break;
-	}
-	return (0);	/* Success. */
-}	/* SkCsEvent */
-
-#endif	/* SK_USE_CSUM */
-
-#endif /* CONFIG_SK98 */