e03d72b99e
This patch contains the following possible cleanups: - make needlessly global functions static - remove unused code Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Stephen Hemminger <shemminger@osdl.org> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
213 lines
6.6 KiB
C
213 lines
6.6 KiB
C
/******************************************************************************
|
|
*
|
|
* Name: skcsum.h
|
|
* Project: GEnesis - SysKonnect SK-NET Gigabit Ethernet (SK-98xx)
|
|
* Version: $Revision: 1.10 $
|
|
* Date: $Date: 2003/08/20 13:59:57 $
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 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_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.
|
|
*/
|
|
#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
|
|
/* needed for Microsoft */
|
|
#define SKCS_STATUS_IP_CSUM_ERROR_UDP 9
|
|
#define SKCS_STATUS_IP_CSUM_ERROR_TCP 10
|
|
/* UDP checksum may be omitted */
|
|
#define SKCS_STATUS_IP_CSUM_OK_NO_UDP 11
|
|
#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 calculate checksum in hw. */
|
|
} SKCS_PROTO_STATS;
|
|
|
|
/*
|
|
* s_Csum - The CSUM module context structure.
|
|
*/
|
|
typedef struct s_Csum {
|
|
/* Enabled receive SK_PROTO_XXX bit flags. */
|
|
unsigned ReceiveFlags[SK_MAX_NETS];
|
|
#ifdef TX_CSUM
|
|
unsigned TransmitFlags[SK_MAX_NETS];
|
|
#endif /* TX_CSUM */
|
|
|
|
/* The protocol statistics structure; one per supported protocol. */
|
|
SKCS_PROTO_STATS ProtoStats[SK_MAX_NETS][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 SK_CS_CALCULATE_CHECKSUM
|
|
extern unsigned SkCsCalculateChecksum(
|
|
void *pData,
|
|
unsigned Length);
|
|
#endif /* SK_CS_CALCULATE_CHECKSUM */
|
|
|
|
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,
|
|
int NetNumber);
|
|
|
|
extern void SkCsSetReceiveFlags(
|
|
SK_AC *pAc,
|
|
unsigned ReceiveFlags,
|
|
unsigned *pChecksum1Offset,
|
|
unsigned *pChecksum2Offset,
|
|
int NetNumber);
|
|
|
|
#endif /* __INC_SKCSUM_H */
|