sk98lin: resurrect driver

This reverts commit e1abecc48938fbe1966ea6e78267fc673fa59295.

The driver works on some hardware that skge doesn't handle yet.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 213 insertions, 0 deletions

diff --git a/drivers/net/sk98lin/h/skcsum.h b/drivers/net/sk98lin/h/skcsum.h
new file mode 100644
index 000000000000..6e256bd9a28c
--- /dev/null
+++ b/drivers/net/sk98lin/h/skcsum.h
@@ -0,0 +1,213 @@
+/******************************************************************************
+ *
+ * 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 */