skge.c

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/******************************************************************************
 *
 * Name:    skge.c
 * Project:	GEnesis, PCI Gigabit Ethernet Adapter
 * Version:	$Revision: 1.1.1.1 $
 * Date:       	$Date: 2005/06/27 17:05:08 $
 * Purpose:	The main driver source module
 *
 ******************************************************************************/

/******************************************************************************
 *
 *	(C)Copyright 1998-2003 SysKonnect GmbH.
 *
 *	Driver for SysKonnect Gigabit Ethernet Server Adapters:
 *
 *	SK-9871 (single link 1000Base-ZX)
 *	SK-9872 (dual link   1000Base-ZX)
 *	SK-9861 (single link 1000Base-SX, VF45 Volition Plug)
 *	SK-9862 (dual link   1000Base-SX, VF45 Volition Plug)
 *	SK-9841 (single link 1000Base-LX)
 *	SK-9842 (dual link   1000Base-LX)
 *	SK-9843 (single link 1000Base-SX)
 *	SK-9844 (dual link   1000Base-SX)
 *	SK-9821 (single link 1000Base-T)
 *	SK-9822 (dual link   1000Base-T)
 *	SK-9881 (single link 1000Base-SX V2 LC)
 *	SK-9871 (single link 1000Base-ZX V2)
 *	SK-9861 (single link 1000Base-SX V2, VF45 Volition Plug)
 *	SK-9841 (single link 1000Base-LX V2)
 *	SK-9843 (single link 1000Base-SX V2)
 *	SK-9821 (single link 1000Base-T V2)
 *
 *	Created 10-Feb-1999, based on Linux' acenic.c, 3c59x.c and
 *	SysKonnects GEnesis Solaris driver
 *	Author: Christoph Goos ([e-mail])
 *	        Mirko Lindner ([e-mail])
 *
 *	Address all question to: [e-mail]
 *
 *	The technical manual for the adapters is available from SysKonnect's
 *	web pages: www.syskonnect.com
 *	Goto "Support" and search Knowledge Base for "manual".
 *
 *	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: skge.c,v $
 *	Revision 1.1.1.1  2005/06/27 17:05:08  linuxpark
 *	Initial import.
 *	
 *	Revision 1.46  2003/02/25 14:16:36  mlindner
 *	Fix: Copyright statement
 *
 *	Revision 1.45  2003/02/25 13:25:55  mlindner
 *	Add: Performance improvements
 *	Add: Support for various vendors
 *	Fix: Init function
 *
 *	Revision 1.44  2003/01/09 09:25:26  mlindner
 *	Fix: Remove useless init_module/cleanup_module forward declarations
 *
 *	Revision 1.43  2002/11/29 08:42:41  mlindner
 *	Fix: Boot message
 *
 *	Revision 1.42  2002/11/28 13:30:23  mlindner
 *	Add: New frame check
 *
 *	Revision 1.41  2002/11/27 13:55:18  mlindner
 *	Fix: Drop wrong csum packets
 *	Fix: Initialize proc_entry after hw check
 *
 *	Revision 1.40  2002/10/31 07:50:37  tschilli
 *	Function SkGeInitAssignRamToQueues() from common module inserted.
 *	Autonegotiation is set to ON for all adapters.
 *	LinkSpeedUsed is used in link up status report.
 *	Role parameter will show up for 1000 Mbps links only.
 *	GetConfiguration() inserted after init level 1 in SkGeChangeMtu().
 *	All return values of SkGeInit() and SkGeInitPort() are checked.
 *
 *	Revision 1.39  2002/10/02 12:56:05  mlindner
 *	Add: Support for Yukon
 *	Add: Support for ZEROCOPY, scatter-gather and hw checksum
 *	Add: New transmit ring function (use SG and TCP/UDP hardware checksumming)
 *	Add: New init function
 *	Add: Speed check and setup
 *	Add: Merge source for kernel 2.2.x and 2.4.x
 *	Add: Opcode check for tcp
 *	Add: Frame length check
 *	Fix: Transmit complete interrupt
 *	Fix: Interrupt moderation
 *
 *	Revision 1.29.2.13  2002/01/14 12:44:52  mlindner
 *	Fix: Rlmt modes
 *
 *	Revision 1.29.2.12  2001/12/07 12:06:18  mlindner
 *	Fix: malloc -> slab changes
 *
 *	Revision 1.29.2.11  2001/12/06 15:19:20  mlindner
 *	Add: DMA attributes
 *	Fix: Module initialisation
 *	Fix: pci_map_single and pci_unmap_single replaced
 *
 *	Revision 1.29.2.10  2001/12/06 09:56:50  mlindner
 *	Corrected some printk's
 *
 *	Revision 1.29.2.9  2001/09/05 12:15:34  mlindner
 *	Add: LBFO Changes
 *	Fix: Counter Errors (Jumbo == to long errors)
 *	Fix: Changed pAC->PciDev declaration
 *	Fix: too short counters
 *
 *	Revision 1.29.2.8  2001/06/25 12:10:44  mlindner
 *	fix: ReceiveIrq() changed.
 *
 *	Revision 1.29.2.7  2001/06/25 08:07:05  mlindner
 *	fix: RLMT locking in ReceiveIrq() changed.
 *
 *	Revision 1.29.2.6  2001/05/21 07:59:29  mlindner
 *	fix: MTU init problems
 *
 *	Revision 1.29.2.5  2001/05/08 11:25:08  mlindner
 *	fix: removed VLAN error message
 *
 *	Revision 1.29.2.4  2001/05/04 13:31:43  gklug
 *	fix: do not handle eth_copy on bad fragments received.
 *
 *	Revision 1.29.2.3  2001/04/23 08:06:43  mlindner
 *	Fix: error handling
 *
 *	Revision 1.29.2.2  2001/03/15 12:04:54  mlindner
 *	Fixed memory problem
 *
 *	Revision 1.29.2.1  2001/03/12 16:41:44  mlindner
 *	add: procfs function
 *	add: dual-net function
 *	add: RLMT networks
 *	add: extended PNMI features
 *
 *	Kernel 2.4.x specific:
 *	Revision 1.xx  2000/09/12 13:31:56  cgoos
 *	Fixed missign "dev=NULL in skge_probe.
 *	Added counting for jumbo frames (corrects error statistic).
 *	Removed VLAN tag check (enables VLAN support).
 *
 *	Kernel 2.2.x specific:
 *	Revision 1.29  2000/02/21 13:31:56  cgoos
 *	Fixed "unused" warning for UltraSPARC change.
 *
 *	Partially kernel 2.2.x specific:
 *	Revision 1.28  2000/02/21 10:32:36  cgoos
 *	Added fixes for UltraSPARC.
 *	Now printing RlmtMode and PrefPort setting at startup.
 *	Changed XmitFrame return value.
 *	Fixed rx checksum calculation for BIG ENDIAN systems.
 *	Fixed rx jumbo frames counted as ierrors.
 *
 *
 *	Revision 1.27  1999/11/25 09:06:28  cgoos
 *	Changed base_addr to unsigned long.
 *
 *	Revision 1.26  1999/11/22 13:29:16  cgoos
 *	Changed license header to GPL.
 *	Changes for inclusion in linux kernel (2.2.13).
 *	Removed 2.0.x defines.
 *	Changed SkGeProbe to skge_probe.
 *	Added checks in SkGeIoctl.
 *
 *	Revision 1.25  1999/10/07 14:47:52  cgoos
 *	Changed 984x to 98xx.
 *
 *	Revision 1.24  1999/09/30 07:21:01  cgoos
 *	Removed SK_RLMT_SLOW_LOOKAHEAD option.
 *	Giving spanning tree packets also to OS now.
 *
 *	Revision 1.23  1999/09/29 07:36:50  cgoos
 *	Changed assignment for IsBc/IsMc.
 *
 *	Revision 1.22  1999/09/28 12:57:09  cgoos
 *	Added CheckQueue also to Single-Port-ISR.
 *
 *	Revision 1.21  1999/09/28 12:42:41  cgoos
 *	Changed parameter strings for RlmtMode.
 *
 *	Revision 1.20  1999/09/28 12:37:57  cgoos
 *	Added CheckQueue for fast delivery of RLMT frames.
 *
 *	Revision 1.19  1999/09/16 07:57:25  cgoos
 *	Copperfield changes.
 *
 *	Revision 1.18  1999/09/03 13:06:30  cgoos
 *	Fixed RlmtMode=CheckSeg bug: wrong DEV_KFREE_SKB in RLMT_SEND caused
 *	double allocated skb's.
 *	FrameStat in ReceiveIrq was accessed via wrong Rxd.
 *	Queue size for async. standby Tx queue was zero.
 *	FillRxLimit of 0 could cause problems with ReQueue, changed to 1.
 *	Removed debug output of checksum statistic.
 *
 *	Revision 1.17  1999/08/11 13:55:27  cgoos
 *	Transmit descriptor polling was not reenabled after SkGePortInit.
 *
 *	Revision 1.16  1999/07/27 15:17:29  cgoos
 *	Added some "\n" in output strings (removed while debuging...).
 *
 *	Revision 1.15  1999/07/23 12:09:30  cgoos
 *	Performance optimization, rx checksumming, large frame support.
 *
 *	Revision 1.14  1999/07/14 11:26:27  cgoos
 *	Removed Link LED settings (now in RLMT).
 *	Added status output at NET UP.
 *	Fixed SMP problems with Tx and SWITCH running in parallel.
 *	Fixed return code problem at RLMT_SEND event.
 *
 *	Revision 1.13  1999/04/07 10:11:42  cgoos
 *	Fixed Single Port problems.
 *	Fixed Multi-Adapter problems.
 *	Always display startup string.
 *
 *	Revision 1.12  1999/03/29 12:26:37  cgoos
 *	Reversed locking to fine granularity.
 *	Fixed skb double alloc problem (caused by incorrect xmit return code).
 *	Enhanced function descriptions.
 *
 *	Revision 1.11  1999/03/15 13:10:51  cgoos
 *	Changed device identifier in output string to ethX.
 *
 *	Revision 1.10  1999/03/15 12:12:34  cgoos
 *	Changed copyright notice.
 *
 *	Revision 1.9  1999/03/15 12:10:17  cgoos
 *	Changed locking to one driver lock.
 *	Added check of SK_AC-size (for consistency with library).
 *
 *	Revision 1.8  1999/03/08 11:44:02  cgoos
 *	Fixed missing dev->tbusy in SkGeXmit.
 *	Changed large frame (jumbo) buffer number.
 *	Added copying of short frames.
 *
 *	Revision 1.7  1999/03/04 13:26:57  cgoos
 *	Fixed spinlock calls for SMP.
 *
 *	Revision 1.6  1999/03/02 09:53:51  cgoos
 *	Added descriptor revertion for big endian machines.
 *
 *	Revision 1.5  1999/03/01 08:50:59  cgoos
 *	Fixed SkGeChangeMtu.
 *	Fixed pci config space accesses.
 *
 *	Revision 1.4  1999/02/18 15:48:44  cgoos
 *	Corrected some printk's.
 *
 *	Revision 1.3  1999/02/18 12:45:55  cgoos
 *	Changed SK_MAX_CARD_PARAM to default 16
 *
 *	Revision 1.2  1999/02/18 10:55:32  cgoos
 *	Removed SkGeDrvTimeStamp function.
 *	Printing "ethX:" before adapter type at adapter init.
 *
 *
 *	10-Feb-1999 cg	Created, based on Linux' acenic.c, 3c59x.c and
 *			SysKonnects GEnesis Solaris driver
 *
 ******************************************************************************/

/******************************************************************************
 *
 * Possible compiler options (#define xxx / -Dxxx):
 *
 *	debugging can be enable by changing SK_DEBUG_CHKMOD and
 *	SK_DEBUG_CHKCAT in makefile (described there).
 *
 ******************************************************************************/

/******************************************************************************
 *
 * Description:
 *
 *	This is the main module of the Linux GE driver.
 *
 *	All source files except skge.c, skdrv1st.h, skdrv2nd.h and sktypes.h
 *	are part of SysKonnect's COMMON MODULES for the SK-98xx adapters.
 *	Those are used for drivers on multiple OS', so some thing may seem
 *	unnecessary complicated on Linux. Please do not try to 'clean up'
 *	them without VERY good reasons, because this will make it more
 *	difficult to keep the Linux driver in synchronisation with the
 *	other versions.
 *
 * Include file hierarchy:
 *
 *	<linux/module.h>
 *
 *	"h/skdrv1st.h"
 *		<linux/version.h>
 *		<linux/types.h>
 *		<linux/kernel.h>
 *		<linux/string.h>
 *		<linux/errno.h>
 *		<linux/ioport.h>
 *		<linux/slab.h>
 *		<linux/interrupt.h>
 *		<linux/pci.h>
 *		<asm/byteorder.h>
 *		<asm/bitops.h>
 *		<asm/io.h>
 *		<linux/netdevice.h>
 *		<linux/etherdevice.h>
 *		<linux/skbuff.h>
 *	    those three depending on kernel version used:
 *		<linux/bios32.h>
 *		<linux/init.h>
 *		<asm/uaccess.h>
 *		<net/checksum.h>
 *
 *		"h/skerror.h"
 *		"h/skdebug.h"
 *		"h/sktypes.h"
 *		"h/lm80.h"
 *		"h/xmac_ii.h"
 *
 *      "h/skdrv2nd.h"
 *		"h/skqueue.h"
 *		"h/skgehwt.h"
 *		"h/sktimer.h"
 *		"h/ski2c.h"
 *		"h/skgepnmi.h"
 *		"h/skvpd.h"
 *		"h/skgehw.h"
 *		"h/skgeinit.h"
 *		"h/skaddr.h"
 *		"h/skgesirq.h"
 *		"h/skcsum.h"
 *		"h/skrlmt.h"
 *
 ******************************************************************************/

#include <config.h>

#ifdef CONFIG_SK98

#include	"h/skversion.h"
#if 0
#include	<linux/module.h>
#include	<linux/init.h>
#include 	<linux/proc_fs.h>
#endif
#include	"h/skdrv1st.h"
#include	"h/skdrv2nd.h"


/* defines ******************************************************************/
/* for debuging on x86 only */
/* #define BREAKPOINT() asm(" int $3"); */

/* use the scatter-gather functionality with sendfile() */
#if 0
#define SK_ZEROCOPY
#endif

/* use of a transmit complete interrupt */
#define USE_TX_COMPLETE

/* use interrupt moderation (for tx complete only) */
#define USE_INT_MOD
#define INTS_PER_SEC	1000

/*
 * threshold for copying small receive frames
 * set to 0 to avoid copying, set to 9001 to copy all frames
 */
#define SK_COPY_THRESHOLD	50

/* number of adapters that can be configured via command line params */
#define SK_MAX_CARD_PARAM	16


/*
 * use those defines for a compile-in version of the driver instead
 * of command line parameters
 */
/* #define LINK_SPEED_A	{"Auto", }		*/
/* #define LINK_SPEED_B	{"Auto", }		*/
/* #define AUTO_NEG_A	{"Sense", }		*/
/* #define AUTO_NEG_B	{"Sense", }		*/
/* #define DUP_CAP_A	{"Both", }		*/
/* #define DUP_CAP_B	{"Both", }		*/
/* #define FLOW_CTRL_A	{"SymOrRem", }		*/
/* #define FLOW_CTRL_B	{"SymOrRem", }		*/
/* #define ROLE_A	{"Auto", }		*/
/* #define ROLE_B	{"Auto", }		*/
/* #define PREF_PORT	{"A", }			*/
/* #define RLMT_MODE	{"CheckLinkState", }	*/

#define DEV_KFREE_SKB(skb) dev_kfree_skb(skb)
#define DEV_KFREE_SKB_IRQ(skb) dev_kfree_skb_irq(skb)
#define DEV_KFREE_SKB_ANY(skb) dev_kfree_skb_any(skb)

/* function prototypes ******************************************************/
static void	FreeResources(struct SK_NET_DEVICE *dev);
static int	SkGeBoardInit(struct SK_NET_DEVICE *dev, SK_AC *pAC);
static SK_BOOL	BoardAllocMem(SK_AC *pAC);
static void	BoardFreeMem(SK_AC *pAC);
static void	BoardInitMem(SK_AC *pAC);
static void	SetupRing(SK_AC*, void*, uintptr_t, RXD**, RXD**, RXD**,
			int*, SK_BOOL);

#if 0
static void	SkGeIsr(int irq, void *dev_id, struct pt_regs *ptregs);
static void	SkGeIsrOnePort(int irq, void *dev_id, struct pt_regs *ptregs);
static int	SkGeOpen(struct SK_NET_DEVICE *dev);
static int	SkGeClose(struct SK_NET_DEVICE *dev);
static int	SkGeXmit(struct sk_buff *skb, struct SK_NET_DEVICE *dev);
static int	SkGeSetMacAddr(struct SK_NET_DEVICE *dev, void *p);
static void	SkGeSetRxMode(struct SK_NET_DEVICE *dev);
static struct	net_device_stats *SkGeStats(struct SK_NET_DEVICE *dev);
static int	SkGeIoctl(struct SK_NET_DEVICE *dev, struct ifreq *rq, int cmd);
#else
void	SkGeIsr(int irq, void *dev_id, struct pt_regs *ptregs);
void	SkGeIsrOnePort(int irq, void *dev_id, struct pt_regs *ptregs);
int	SkGeOpen(struct SK_NET_DEVICE *dev);
int	SkGeClose(struct SK_NET_DEVICE *dev);
int	SkGeXmit(struct sk_buff *skb, struct SK_NET_DEVICE *dev);
#endif
static void	GetConfiguration(SK_AC*);
static void	ProductStr(SK_AC*);
static int	XmitFrame(SK_AC*, TX_PORT*, struct sk_buff*);
static void	FreeTxDescriptors(SK_AC*pAC, TX_PORT*);
static void	FillRxRing(SK_AC*, RX_PORT*);
static SK_BOOL	FillRxDescriptor(SK_AC*, RX_PORT*);
#if 0
static void	ReceiveIrq(SK_AC*, RX_PORT*, SK_BOOL);
#else
void	ReceiveIrq(SK_AC*, RX_PORT*, SK_BOOL);
#endif
static void ClearAndStartRx(SK_AC*, int);
static void	ClearTxIrq(SK_AC*, int, int);
static void	ClearRxRing(SK_AC*, RX_PORT*);
static void	ClearTxRing(SK_AC*, TX_PORT*);
#if 0
static void	SetQueueSizes(SK_AC	*pAC);

static int	SkGeChangeMtu(struct SK_NET_DEVICE *dev, int new_mtu);
#endif
static void	PortReInitBmu(SK_AC*, int);
#if 0
static int	SkGeIocMib(DEV_NET*, unsigned int, int);
static int	XmitFrameSG(SK_AC*, TX_PORT*, struct sk_buff*);
#endif

/*Extern */

/* external Proc function */
extern int proc_read(
	char	*buffer,
	char	**buffer_location,
	off_t	offset,
	int		buffer_length,
	int		*eof,
	void	*data);

#ifdef DEBUG
static void	DumpMsg(struct sk_buff*, char*);
static void	DumpData(char*, int);
static void	DumpLong(char*, int);
#endif