skge.c

该文件是rt_linux

/******************************************************************************
 *
 * Name:    skge.c
 * Project:	GEnesis, PCI Gigabit Ethernet Adapter
 * Version:	$Revision: 1.29.2.6 $
 * Date:       	$Date: 2001/05/21 07:59:29 $
 * Purpose:	The main driver source module
 *
 ******************************************************************************/
 
/******************************************************************************
 *
 *	(C)Copyright 1998-2001 SysKonnect GmbH.
 *
 *	Driver for SysKonnect Gigabit Ethernet Server Adapters:
 *
 *	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)
 *
 *	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 1.29.2.6  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	"h/skversion.h"

#include	<linux/module.h>
#include	<linux/init.h>
#include 	<linux/proc_fs.h>

#include	"h/skdrv1st.h"
#include	"h/skdrv2nd.h"

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

/* 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	200

/* 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 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 net_device *dev);
int		init_module(void);
void		cleanup_module(void);
static int	SkGeBoardInit(struct 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);

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 net_device *dev);
static int	SkGeClose(struct net_device *dev);
static int	SkGeXmit(struct sk_buff *skb, struct net_device *dev);
static int	SkGeSetMacAddr(struct net_device *dev, void *p);
static void	SkGeSetRxMode(struct net_device *dev);
static struct net_device_stats *SkGeStats(struct net_device *dev);
static int	SkGeIoctl(struct net_device *dev, struct ifreq *rq, int cmd);
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*);
static void	ReceiveIrq(SK_AC*, RX_PORT*);
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*);
static void	SetQueueSizes(SK_AC	*pAC);
static int	SkGeChangeMtu(struct net_device *dev, int new_mtu);
static void	PortReInitBmu(SK_AC*, int);
static int	SkGeIocMib(DEV_NET*, unsigned int, int);


/*Extern */

extern struct proc_dir_entry *pSkRootDir;

//extern struct proc_dir_entry Our_Proc_Dir;
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


/* global variables *********************************************************/
static const char *BootString = BOOT_STRING;
struct net_device *sk98lin_root_dev = NULL;
static int probed __initdata = 0;
struct inode_operations SkInodeOps;
//static struct file_operations SkFileOps;  /* with open/relase */

/* local variables **********************************************************/
static uintptr_t TxQueueAddr[SK_MAX_MACS][2] = {{0x680, 0x600},{0x780, 0x700}};
static uintptr_t RxQueueAddr[SK_MAX_MACS] = {0x400, 0x480};



void proc_fill_inode(struct inode *inode, int fill)
{
	if (fill)
		MOD_INC_USE_COUNT;
	else
		MOD_DEC_USE_COUNT;
}



/*****************************************************************************
 *
 * 	skge_probe - find all SK-98xx adapters
 *
 * Description:
 *	This function scans the PCI bus for SK-98xx adapters. Resources for
 *	each adapter are allocated and the adapter is brought into Init 1
 *	state.
 *
 * Returns:
 *	0, if everything is ok
 *	!=0, on error
 */
static int __init skge_probe (void)
{
	int			proc_root_initialized = 0;
	int 		boards_found = 0;
	int			version_disp = 0;
	SK_AC		*pAC;
	DEV_NET		*pNet = NULL;
	struct 		pci_dev	*pdev = NULL;
	unsigned long		base_address;
	struct net_device *dev = NULL;
	struct proc_dir_entry	*pProcFile;

	if (probed)
		return -ENODEV;
	probed++;
	
	/* display driver info */
	if (!version_disp)
	{
		/* set display flag to TRUE so that */
		/* we only display this string ONCE */
		version_disp = 1;
		printk("%s\n", BootString);
	}

	if (!pci_present())		/* is PCI support present? */
		return -ENODEV;

	while((pdev = pci_find_device(PCI_VENDOR_ID_SYSKONNECT,
				      PCI_DEVICE_ID_SYSKONNECT_GE, pdev)) != NULL) {

		dev = NULL;
		pNet = NULL;

		if (pci_enable_device(pdev))
			continue;

		/* Configure DMA attributes. */
		if (pci_set_dma_mask(pdev, (u64) 0xffffffffffffffff) &&
		    pci_set_dma_mask(pdev, (u64) 0xffffffff))
				continue;

		if ((dev = init_etherdev(dev, sizeof(DEV_NET))) == 0) {
			printk(KERN_ERR "Unable to allocate etherdev "
			       "structure!\n");