lib

/*
 * This code is derived from the VIA reference driver (copyright message
 * below) provided to Red Hat by VIA Networking Technologies, Inc. for
 * addition to the Linux kernel.
 *
 * The code has been merged into one source file, cleaned up to follow
 * Linux coding style,  ported to the Linux 2.6 kernel tree and cleaned
 * for 64bit hardware platforms.
 *
 * TODO
 *	rx_copybreak/alignment
 *	Scatter gather
 *	More testing
 *
 * The changes are (c) Copyright 2004, Red Hat Inc. <alan@lxorguk.ukuu.org.uk>
 * Additional fixes and clean up: Francois Romieu
 *
 * This source has not been verified for use in safety critical systems.
 *
 * Please direct queries about the revamped driver to the linux-kernel
 * list not VIA.
 *
 * Original code:
 *
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This software may be redistributed and/or modified under
 * the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 *
 * Author: Chuang Liang-Shing, AJ Jiang
 *
 * Date: Jan 24, 2003
 *
 * MODULE_LICENSE("GPL");
 *
 */


#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/wait.h>
#include <linux/io.h>
#include <linux/if.h>
#include <linux/uaccess.h>
#include <linux/proc_fs.h>
#include <linux/inetdevice.h>
#include <linux/reboot.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/in.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/crc-ccitt.h>
#include <linux/crc32.h>

#include "via-velocity.h"


static int velocity_nics;
static int msglevel = MSG_LEVEL_INFO;

/**
 *	mac_get_cam_mask	-	Read a CAM mask
 *	@regs: register block for this velocity
 *	@mask: buffer to store mask
 *
 *	Fetch the mask bits of the selected CAM and store them into the
 *	provided mask buffer.
 */
static void mac_get_cam_mask(struct mac_regs __iomem *regs, u8 *mask)
{
	int i;

	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	writeb(0, &regs->CAMADDR);

	/* read mask */
	for (i = 0; i < 8; i++)
		*mask++ = readb(&(regs->MARCAM[i]));

	/* disable CAMEN */
	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}


/**
 *	mac_set_cam_mask	-	Set a CAM mask
 *	@regs: register block for this velocity
 *	@mask: CAM mask to load
 *
 *	Store a new mask into a CAM
 */
static void mac_set_cam_mask(struct mac_regs __iomem *regs, u8 *mask)
{
	int i;
	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	writeb(CAMADDR_CAMEN, &regs->CAMADDR);

	for (i = 0; i < 8; i++)
		writeb(*mask++, &(regs->MARCAM[i]));

	/* disable CAMEN */
	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}

static void mac_set_vlan_cam_mask(struct mac_regs __iomem *regs, u8 *mask)
{
	int i;
	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_MASK, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	writeb(CAMADDR_CAMEN | CAMADDR_VCAMSL, &regs->CAMADDR);

	for (i = 0; i < 8; i++)
		writeb(*mask++, &(regs->MARCAM[i]));

	/* disable CAMEN */
	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}

/**
 *	mac_set_cam	-	set CAM data
 *	@regs: register block of this velocity
 *	@idx: Cam index
 *	@addr: 2 or 6 bytes of CAM data
 *
 *	Load an address or vlan tag into a CAM
 */
static void mac_set_cam(struct mac_regs __iomem *regs, int idx, const u8 *addr)
{
	int i;

	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_DATA, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	idx &= (64 - 1);

	writeb(CAMADDR_CAMEN | idx, &regs->CAMADDR);

	for (i = 0; i < 6; i++)
		writeb(*addr++, &(regs->MARCAM[i]));

	BYTE_REG_BITS_ON(CAMCR_CAMWR, &regs->CAMCR);

	udelay(10);

	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}

static void mac_set_vlan_cam(struct mac_regs __iomem *regs, int idx,
			     const u8 *addr)
{

	/* Select CAM mask */
	BYTE_REG_BITS_SET(CAMCR_PS_CAM_DATA, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);

	idx &= (64 - 1);

	writeb(CAMADDR_CAMEN | CAMADDR_VCAMSL | idx, &regs->CAMADDR);
	writew(*((u16 *) addr), &regs->MARCAM[0]);

	BYTE_REG_BITS_ON(CAMCR_CAMWR, &regs->CAMCR);

	udelay(10);

	writeb(0, &regs->CAMADDR);

	/* Select mar */
	BYTE_REG_BITS_SET(CAMCR_PS_MAR, CAMCR_PS1 | CAMCR_PS0, &regs->CAMCR);
}


/**
 *	mac_wol_reset	-	reset WOL after exiting low power
 *	@regs: register block of this velocity
 *
 *	Called after we drop out of wake on lan mode in order to
 *	reset the Wake on lan features. This function doesn't restore
 *	the rest of the logic from the result of sleep/wakeup
 */
static void mac_wol_reset(struct mac_regs __iomem *regs)
{

	/* Turn off SWPTAG right after leaving power mode */
	BYTE_REG_BITS_OFF(STICKHW_SWPTAG, &regs->STICKHW);
	/* clear sticky bits */
	BYTE_REG_BITS_OFF((STICKHW_DS1 | STICKHW_DS0), &regs->STICKHW);

	BYTE_REG_BITS_OFF(CHIPGCR_FCGMII, &regs->CHIPGCR);
	BYTE_REG_BITS_OFF(CHIPGCR_FCMODE, &regs->CHIPGCR);
	/* disable force PME-enable */
	writeb(WOLCFG_PMEOVR, &regs->WOLCFGClr);
	/* disable power-event config bit */
	writew(0xFFFF, &regs->WOLCRClr);
	/* clear power status */
	writew(0xFFFF, &regs->WOLSRClr);
}

static const struct ethtool_ops velocity_ethtool_ops;

/*
    Define module options
*/

MODULE_AUTHOR("VIA Networking Technologies, Inc.");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("VIA Networking Velocity Family Gigabit Ethernet Adapter Driver");

#define VELOCITY_PARAM(N, D) \
	static int N[MAX_UNITS] = OPTION_DEFAULT;\
	module_param_array(N, int, NULL, 0); \
	MODULE_PARM_DESC(N, D);

#define RX_DESC_MIN     64
#define RX_DESC_MAX     255
#define RX_DESC_DEF     64
VELOCITY_PARAM(RxDescriptors, "Number of receive descriptors");

#define TX_DESC_MIN     16
#define TX_DESC_MAX     256
#define TX_DESC_DEF     64
VELOCITY_PARAM(TxDescriptors, "Number of transmit descriptors");

#define RX_THRESH_MIN   0
#define RX_THRESH_MAX   3
#define RX_THRESH_DEF   0
/* rx_thresh[] is used for controlling the receive fifo threshold.
   0: indicate the rxfifo threshold is 128 bytes.
   1: indicate the rxfifo threshold is 512 bytes.
   2: indicate the rxfifo threshold is 1024 bytes.
   3: indicate the rxfifo threshold is store & forward.
*/
VELOCITY_PARAM(rx_thresh, "Receive fifo threshold");

#define DMA_LENGTH_MIN  0
#define DMA_LENGTH_MAX  7
#define DMA_LENGTH_DEF  0

/* DMA_length[] is used for controlling the DMA length
   0: 8 DWORDs
   1: 16 DWORDs
   2: 32 DWORDs
   3: 64 DWORDs
   4: 128 DWORDs
   5: 256 DWORDs
   6: SF(flush till emply)
   7: SF(flush till emply)
*/
VELOCITY_PARAM(DMA_length, "DMA length");

#define IP_ALIG_DEF     0
/* IP_byte_align[] is used for IP header DWORD byte aligned
   0: indicate the IP header won't be DWORD byte aligned.(Default) .
   1: indicate the IP header will be DWORD byte aligned.
      In some enviroment, the IP header should be DWORD byte aligned,
      or the packet will be droped when we receive it. (eg: IPVS)
*/
VELOCITY_PARAM(IP_byte_align, "Enable IP header dword aligned");

#define TX_CSUM_DEF     1
/* txcsum_offload[] is used for setting the checksum offload ability of NIC.
   (We only support RX checksum offload now)
   0: disable csum_offload[checksum offload
   1: enable checksum offload. (Default)
*/
VELOCITY_PARAM(txcsum_offload, "Enable transmit packet checksum offload");

#define FLOW_CNTL_DEF   1
#define FLOW_CNTL_MIN   1
#define FLOW_CNTL_MAX   5

/* flow_control[] is used for setting the flow control ability of NIC.
   1: hardware deafult - AUTO (default). Use Hardware default value in ANAR.
   2: enable TX flow control.
   3: enable RX flow control.
   4: enable RX/TX flow control.
   5: disable
*/
VELOCITY_PARAM(flow_control, "Enable flow control ability");

#define MED_LNK_DEF 0
#define MED_LNK_MIN 0
#define MED_LNK_MAX 4
/* speed_duplex[] is used for setting the speed and duplex mode of NIC.
   0: indicate autonegotiation for both speed and duplex mode
   1: indicate 100Mbps half duplex mode
   2: indicate 100Mbps full duplex mode
   3: indicate 10Mbps half duplex mode
   4: indicate 10Mbps full duplex mode

   Note:
   if EEPROM have been set to the force mode, this option is ignored
   by driver.
*/
VELOCITY_PARAM(speed_duplex, "Setting the speed and duplex mode");

#define VAL_PKT_LEN_DEF     0
/* ValPktLen[] is used for setting the checksum offload ability of NIC.
   0: Receive frame with invalid layer 2 length (Default)
   1: Drop frame with invalid layer 2 length
*/
VELOCITY_PARAM(ValPktLen, "Receiving or Drop invalid 802.3 frame");

#define WOL_OPT_DEF     0
#define WOL_OPT_MIN     0
#define WOL_OPT_MAX     7
/* wol_opts[] is used for controlling wake on lan behavior.
   0: Wake up if recevied a magic packet. (Default)
   1: Wake up if link status is on/off.
   2: Wake up if recevied an arp packet.
   4: Wake up if recevied any unicast packet.
   Those value can be sumed up to support more than one option.
*/
VELOCITY_PARAM(wol_opts, "Wake On Lan options");

#define INT_WORKS_DEF   20
#define INT_WORKS_MIN   10
#define INT_WORKS_MAX   64

VELOCITY_PARAM(int_works, "Number of packets per interrupt services");

static int rx_copybreak = 200;
module_param(rx_copybreak, int, 0644);
MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");

#ifdef CONFIG_PM
static DEFINE_SPINLOCK(velocity_dev_list_lock);
static LIST_HEAD(velocity_dev_list);
#endif

/*
 *	Internal board variants. At the moment we have only one
 */
static struct velocity_info_tbl chip_info_table[] = {
	{CHIP_TYPE_VT6110, "VIA Networking Velocity Family Gigabit Ethernet Adapter", 1, 0x00FFFFFFUL},
	{ }
};

/*
 *	Describe the PCI device identifiers that we support in this
 *	device driver. Used for hotplug autoloading.
 */
static const struct pci_device_id velocity_id_table[] __devinitdata = {
	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_612X) },
	{ }
};

MODULE_DEVICE_TABLE(pci, velocity_id_table);

/**
 *	get_chip_name	- 	identifier to name
 *	@id: chip identifier
 *
 *	Given a chip identifier return a suitable description. Returns
 *	a pointer a static string valid while the driver is loaded.
 */
static const char __devinit *get_chip_name(enum chip_type chip_id)
{
	int i;
	for (i = 0; chip_info_table[i].name != NULL; i++)
		if (chip_info_table[i].chip_id == chip_id)
			break;
	return chip_info_table[i].name;
}

/**
 *	velocity_remove1	-	device unplug
 *	@pdev: PCI device being removed
 *
 *	Device unload callback. Called on an unplug or on module
 *	unload for each active device that is present. Disconnects
 *	the device from the network layer and frees all the resources
 */
static void __devexit velocity_remove1(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct velocity_info *vptr = netdev_priv(dev);

#ifdef CONFIG_PM
	unsigned long flags;

	spin_lock_irqsave(&velocity_dev_list_lock, flags);
	if (!list_empty(&velocity_dev_list))
		list_del(&vptr->list);
	spin_unlock_irqrestore(&velocity_dev_list_lock, flags);
#endif
	unregister_netdev(dev);
	iounmap(vptr->mac_regs);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
	free_netdev(dev);

	velocity_nics--;
}

/**
 *	velocity_set_int_opt	-	parser for integer options
 *	@opt: pointer to option value
 *	@val: value the user requested (or -1 for default)
 *	@min: lowest value allowed
 *	@max: highest value allowed
 *	@def: default value
 *	@name: property name
 *	@dev: device name
 *
 *	Set an integer property in the module options. This function does
 *	all the verification and checking as well as reporting so that
 *	we don't duplicate code for each option.
 */
static void __devinit velocity_set_int_opt(int *opt, int val, int min, int max, int def, char *name, const char *devname)
{
	if (val == -1)
		*opt = def;
	else if (val < min || val > max) {
		VELOCITY_PRT(MSG_LEVEL_INFO, KERN_NOTICE "%s: the value of parameter %s is invalid, the valid range is (%d-%d)\n",
					devname, name, min, max);
		*opt = def;
	} else {
		VELOCITY_PRT(MSG_LEVEL_INFO, KERN_INFO "%s: set value of parameter %s to %d\n",
					devname, name, val);
		*opt = val;
	}
}

/**
 *	velocity_set_bool_opt	-	parser for boolean options
 *	@opt: pointer to option value
 *	@val: value the user requested (or -1 for default)
 *	@def: default value (yes/no)
 *	@flag: numeric value to set for true.
 *	@name: property name
 *	@dev: device name
 *
 *	Set a boolean property in the module options. This function does
 *	all the verification and checking as well as reporting so that
 *	we don't duplicate code for each option.
 */
static void __devinit velocity_set_bool_opt(u32 *opt, int val, int def, u32 flag, char *name, const char *devname)
{
	(*opt) &= (~flag);
	if (val == -1)
		*opt |= (def ? flag : 0);
	else if (val < 0 || val > 1) {
		printk(KERN_NOTICE "%s: the value of parameter %s is invalid, the valid range is (0-1)\n",
			devname, name);
		*opt |= (def ? flag : 0);
	} else {
		printk(KERN_INFO "%s: set parameter %s to %s\n",
			devname, name, val ? "TRUE" : "FALSE");
		*opt |= (val ? flag : 0);
	}
}

/**
 *	velocity_get_options	-	set options on device
 *	@opts: option structure for the device
 *	@index: index of option to use in module options array
 *	@devname: device name
 *
 *	Turn the module and command options into a single structure
 *	for the current device
 */
static void __devinit velocity_get_options(struct velocity_opt *opts, int index, const char *devname)
{

	velocity_set_int_opt(&opts->rx_thresh, rx_thresh[index], RX_THRESH_MIN, RX_THRESH_MAX, RX_THRESH_DEF, "rx_thresh", devname);
	velocity_set_int_opt(&opts->DMA_length, DMA_length[index], DMA_LENGTH_MIN, DMA_LENGTH_MAX, DMA_LENGTH_DEF, "DMA_length", devname);
	velocity_set_int_opt(&opts->numrx, RxDescriptors[index], RX_DESC_MIN, RX_DESC_MAX, RX_DESC_DEF, "RxDescriptors", devname);
	velocity_set_int_opt(&opts->numtx, TxDescriptors[index], TX_DESC_MIN, TX_DESC_MAX, TX_DESC_DEF, "TxDescriptors", devname);

	velocity_set_bool_opt(&opts->flags, txcsum_offload[index], TX_CSUM_DEF, VELOCITY_FLAGS_TX_CSUM, "txcsum_offload", devname);
	velocity_set_int_opt(&opts->flow_cntl, flow_control[index], FLOW_CNTL_MIN, FLOW_CNTL_MAX, FLOW_CNTL_DEF, "flow_control", devname);
	velocity_set_bool_opt(&opts->flags, IP_byte_align[index], IP_ALIG_DEF, VELOCITY_FLAGS_IP_ALIGN, "IP_byte_align", devname);
	velocity_set_bool_opt(&opts->flags, ValPktLen[index], VAL_PKT_LEN_DEF, VELOCITY_FLAGS_VAL_PKT_LEN, "ValPktLen", devname);
	velocity_set_int_opt((int *) &opts->spd_dpx, speed_duplex[index], MED_LNK_MIN, MED_LNK_MAX, MED_LNK_DEF, "Media link mode", devname);
	velocity_set_int_opt((int *) &opts->wol_opts, wol_opts[index], WOL_OPT_MIN, WOL_OPT_MAX, WOL_OPT_DEF, "Wake On Lan options", devname);
	velocity_set_int_opt((int *) &opts->int_works, int_works[index], INT_WORKS_MIN, INT_WORKS_MAX, INT_WORKS_DEF, "Interrupt service works", devname);
	opts->numrx = (opts->numrx & ~3);
}

/**
 *	velocity_init_cam_filter	-	initialise CAM
 *	@vptr: velocity to program
 *
 *	Initialize the content addressable memory used for filters. Load
 *	appropriately according to the presence of VLAN
 */
static void velocity_init_cam_filter(struct velocity_info *vptr)
{
	struct mac_regs __iomem *regs = vptr->mac_regs;

	/* Turn on MCFG_PQEN, turn off MCFG_RTGOPT */
	WORD_REG_BITS_SET(MCFG_PQEN, MCFG_RTGOPT, &regs->MCFG);
	WORD_REG_BITS_ON(MCFG_VIDFR, &regs->MCFG);

	/* Disable all CAMs */
	memset(vptr->vCAMmask, 0, sizeof(u8) * 8);
Mode	Name	Size
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-rw-r--r--	locking-selftest-wsem.h	163	log stats plain blame
-rw-r--r--	locking-selftest.c	29314	log stats plain blame
d---------	lzo	163	log stats plain
-rw-r--r--	nlattr.c	12456	log stats plain blame
-rw-r--r--	parser.c	6187	log stats plain blame
-rw-r--r--	percpu_counter.c	3230	log stats plain blame
-rw-r--r--	plist.c	2820	log stats plain blame
-rw-r--r--	prio_heap.c	1477	log stats plain blame
-rw-r--r--	prio_tree.c	12541	log stats plain blame
-rw-r--r--	proportions.c	9527	log stats plain blame
-rw-r--r--	radix-tree.c	31708	log stats plain blame
-rw-r--r--	random32.c	3927	log stats plain blame
-rw-r--r--	ratelimit.c	1286	log stats plain blame
-rw-r--r--	rbtree.c	8703	log stats plain blame
-rw-r--r--	reciprocal_div.c	159	log stats plain blame
d---------	reed_solomon	156	log stats plain
-rw-r--r--	rwsem-spinlock.c	6965	log stats plain blame
-rw-r--r--	rwsem.c	6602	log stats plain blame
-rw-r--r--	scatterlist.c	12060	log stats plain blame
-rw-r--r--	sha1.c	2469	log stats plain blame
-rw-r--r--	show_mem.c	1424	log stats plain blame
-rw-r--r--	smp_processor_id.c	1119	log stats plain blame
-rw-r--r--	sort.c	2605	log stats plain blame
-rw-r--r--	spinlock_debug.c	6967	log stats plain blame
-rw-r--r--	string.c	13917	log stats plain blame
-rw-r--r--	string_helpers.c	1702	log stats plain blame
-rw-r--r--	swiotlb.c	26231	log stats plain blame
-rw-r--r--	syscall.c	2475	log stats plain blame
-rw-r--r--	textsearch.c	9772	log stats plain blame
-rw-r--r--	ts_bm.c	5408	log stats plain blame
-rw-r--r--	ts_fsm.c	10866	log stats plain blame
-rw-r--r--	ts_kmp.c	4437	log stats plain blame
-rw-r--r--	vsprintf.c	43345	log stats plain blame
d---------	zlib_deflate	189	log stats plain
d---------	zlib_inflate	414	log stats plain