path: root/drivers/pci/quirks.c

/*
 *  This file contains work-arounds for many known PCI hardware
 *  bugs.  Devices present only on certain architectures (host
 *  bridges et cetera) should be handled in arch-specific code.
 *
 *  Note: any quirks for hotpluggable devices must _NOT_ be declared __init.
 *
 *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
 *
 *  Init/reset quirks for USB host controllers should be in the
 *  USB quirks file, where their drivers can access reuse it.
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/acpi.h>
#include <linux/kallsyms.h>
#include <linux/dmi.h>
#include <linux/pci-aspm.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/ktime.h>
#include <asm/dma.h>	/* isa_dma_bridge_buggy */
#include "pci.h"

/*
 * Decoding should be disabled for a PCI device during BAR sizing to avoid
 * conflict. But doing so may cause problems on host bridge and perhaps other
 * key system devices. For devices that need to have mmio decoding always-on,
 * we need to set the dev->mmio_always_on bit.
 */
static void quirk_mmio_always_on(struct pci_dev *dev)
{
	dev->mmio_always_on = 1;
}
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_ANY_ID, PCI_ANY_ID,
				PCI_CLASS_BRIDGE_HOST, 8, quirk_mmio_always_on);

/* The Mellanox Tavor device gives false positive parity errors
 * Mark this device with a broken_parity_status, to allow
 * PCI scanning code to "skip" this now blacklisted device.
 */
static void quirk_mellanox_tavor(struct pci_dev *dev)
{
	dev->broken_parity_status = 1;	/* This device gives false positives */
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX,PCI_DEVICE_ID_MELLANOX_TAVOR,quirk_mellanox_tavor);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX,PCI_DEVICE_ID_MELLANOX_TAVOR_BRIDGE,quirk_mellanox_tavor);

/* Deal with broken BIOSes that neglect to enable passive release,
   which can cause problems in combination with the 82441FX/PPro MTRRs */
static void quirk_passive_release(struct pci_dev *dev)
{
	struct pci_dev *d = NULL;
	unsigned char dlc;

	/* We have to make sure a particular bit is set in the PIIX3
	   ISA bridge, so we have to go out and find it. */
	while ((d = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, d))) {
		pci_read_config_byte(d, 0x82, &dlc);
		if (!(dlc & 1<<1)) {
			dev_info(&d->dev, "PIIX3: Enabling Passive Release\n");
			dlc |= 1<<1;
			pci_write_config_byte(d, 0x82, dlc);
		}
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82441,	quirk_passive_release);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82441,	quirk_passive_release);

/*  The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a workaround
    but VIA don't answer queries. If you happen to have good contacts at VIA
    ask them for me please -- Alan

    This appears to be BIOS not version dependent. So presumably there is a
    chipset level fix */

static void quirk_isa_dma_hangs(struct pci_dev *dev)
{
	if (!isa_dma_bridge_buggy) {
		isa_dma_bridge_buggy=1;
		dev_info(&dev->dev, "Activating ISA DMA hang workarounds\n");
	}
}
	/*
	 * Its not totally clear which chipsets are the problematic ones
	 * We know 82C586 and 82C596 variants are affected.
	 */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C586_0,	quirk_isa_dma_hangs);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C596,	quirk_isa_dma_hangs);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82371SB_0,  quirk_isa_dma_hangs);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL,	PCI_DEVICE_ID_AL_M1533,		quirk_isa_dma_hangs);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC,	PCI_DEVICE_ID_NEC_CBUS_1,	quirk_isa_dma_hangs);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC,	PCI_DEVICE_ID_NEC_CBUS_2,	quirk_isa_dma_hangs);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC,	PCI_DEVICE_ID_NEC_CBUS_3,	quirk_isa_dma_hangs);

/*
 * Intel NM10 "TigerPoint" LPC PM1a_STS.BM_STS must be clear
 * for some HT machines to use C4 w/o hanging.
 */
static void quirk_tigerpoint_bm_sts(struct pci_dev *dev)
{
	u32 pmbase;
	u16 pm1a;

	pci_read_config_dword(dev, 0x40, &pmbase);
	pmbase = pmbase & 0xff80;
	pm1a = inw(pmbase);

	if (pm1a & 0x10) {
		dev_info(&dev->dev, FW_BUG "TigerPoint LPC.BM_STS cleared\n");
		outw(0x10, pmbase);
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TGP_LPC, quirk_tigerpoint_bm_sts);

/*
 *	Chipsets where PCI->PCI transfers vanish or hang
 */
static void quirk_nopcipci(struct pci_dev *dev)
{
	if ((pci_pci_problems & PCIPCI_FAIL)==0) {
		dev_info(&dev->dev, "Disabling direct PCI/PCI transfers\n");
		pci_pci_problems |= PCIPCI_FAIL;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_5597,		quirk_nopcipci);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_496,		quirk_nopcipci);

static void quirk_nopciamd(struct pci_dev *dev)
{
	u8 rev;
	pci_read_config_byte(dev, 0x08, &rev);
	if (rev == 0x13) {
		/* Erratum 24 */
		dev_info(&dev->dev, "Chipset erratum: Disabling direct PCI/AGP transfers\n");
		pci_pci_problems |= PCIAGP_FAIL;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,	PCI_DEVICE_ID_AMD_8151_0,	quirk_nopciamd);

/*
 *	Triton requires workarounds to be used by the drivers
 */
static void quirk_triton(struct pci_dev *dev)
{
	if ((pci_pci_problems&PCIPCI_TRITON)==0) {
		dev_info(&dev->dev, "Limiting direct PCI/PCI transfers\n");
		pci_pci_problems |= PCIPCI_TRITON;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82437,	quirk_triton);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82437VX,	quirk_triton);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82439,	quirk_triton);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82439TX,	quirk_triton);

/*
 *	VIA Apollo KT133 needs PCI latency patch
 *	Made according to a windows driver based patch by George E. Breese
 *	see PCI Latency Adjust on http://www.viahardware.com/download/viatweak.shtm
 *	and http://www.georgebreese.com/net/software/#PCI
 *      Also see http://www.au-ja.org/review-kt133a-1-en.phtml for
 *      the info on which Mr Breese based his work.
 *
 *	Updated based on further information from the site and also on
 *	information provided by VIA
 */
static void quirk_vialatency(struct pci_dev *dev)
{
	struct pci_dev *p;
	u8 busarb;
	/* Ok we have a potential problem chipset here. Now see if we have
	   a buggy southbridge */

	p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, NULL);
	if (p!=NULL) {
		/* 0x40 - 0x4f == 686B, 0x10 - 0x2f == 686A; thanks Dan Hollis */
		/* Check for buggy part revisions */
		if (p->revision < 0x40 || p->revision > 0x42)
			goto exit;
	} else {
		p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
		if (p==NULL)	/* No problem parts */
			goto exit;
		/* Check for buggy part revisions */
		if (p->revision < 0x10 || p->revision > 0x12)
			goto exit;
	}

	/*
	 *	Ok we have the problem. Now set the PCI master grant to
	 *	occur every master grant. The apparent bug is that under high
	 *	PCI load (quite common in Linux of course) you can get data
	 *	loss when the CPU is held off the bus for 3 bus master requests
	 *	This happens to include the IDE controllers....
	 *
	 *	VIA only apply this fix when an SB Live! is present but under
	 *	both Linux and Windows this isn't enough, and we have seen
	 *	corruption without SB Live! but with things like 3 UDMA IDE
	 *	controllers. So we ignore that bit of the VIA recommendation..
	 */

	pci_read_config_byte(dev, 0x76, &busarb);
	/* Set bit 4 and bi 5 of byte 76 to 0x01
	   "Master priority rotation on every PCI master grant */
	busarb &= ~(1<<5);
	busarb |= (1<<4);
	pci_write_config_byte(dev, 0x76, busarb);
	dev_info(&dev->dev, "Applying VIA southbridge workaround\n");
exit:
	pci_dev_put(p);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8363_0,	quirk_vialatency);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8371_1,	quirk_vialatency);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8361,		quirk_vialatency);
/* Must restore this on a resume from RAM */
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8363_0,	quirk_vialatency);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8371_1,	quirk_vialatency);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8361,		quirk_vialatency);

/*
 *	VIA Apollo VP3 needs ETBF on BT848/878
 */
static void quirk_viaetbf(struct pci_dev *dev)
{
	if ((pci_pci_problems&PCIPCI_VIAETBF)==0) {
		dev_info(&dev->dev, "Limiting direct PCI/PCI transfers\n");
		pci_pci_problems |= PCIPCI_VIAETBF;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C597_0,	quirk_viaetbf);

static void quirk_vsfx(struct pci_dev *dev)
{
	if ((pci_pci_problems&PCIPCI_VSFX)==0) {
		dev_info(&dev->dev, "Limiting direct PCI/PCI transfers\n");
		pci_pci_problems |= PCIPCI_VSFX;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C576,	quirk_vsfx);

/*
 *	Ali Magik requires workarounds to be used by the drivers
 *	that DMA to AGP space. Latency must be set to 0xA and triton
 *	workaround applied too
 *	[Info kindly provided by ALi]
 */
static void quirk_alimagik(struct pci_dev *dev)
{
	if ((pci_pci_problems&PCIPCI_ALIMAGIK)==0) {
		dev_info(&dev->dev, "Limiting direct PCI/PCI transfers\n");
		pci_pci_problems |= PCIPCI_ALIMAGIK|PCIPCI_TRITON;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL,	PCI_DEVICE_ID_AL_M1647,		quirk_alimagik);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL,	PCI_DEVICE_ID_AL_M1651,		quirk_alimagik);

/*
 *	Natoma has some interesting boundary conditions with Zoran stuff
 *	at least
 */
static void quirk_natoma(struct pci_dev *dev)
{
	if ((pci_pci_problems&PCIPCI_NATOMA)==0) {
		dev_info(&dev->dev, "Limiting direct PCI/PCI transfers\n");
		pci_pci_problems |= PCIPCI_NATOMA;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82441,	quirk_natoma);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82443LX_0,	quirk_natoma);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82443LX_1,	quirk_natoma);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82443BX_0,	quirk_natoma);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82443BX_1,	quirk_natoma);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82443BX_2,	quirk_natoma);

/*
 *  This chip can cause PCI parity errors if config register 0xA0 is read
 *  while DMAs are occurring.
 */
static void quirk_citrine(struct pci_dev *dev)
{
	dev->cfg_size = 0xA0;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM,	PCI_DEVICE_ID_IBM_CITRINE,	quirk_citrine);

/*
 *  S3 868 and 968 chips report region size equal to 32M, but they decode 64M.
 *  If it's needed, re-allocate the region.
 */
static void quirk_s3_64M(struct pci_dev *dev)
{
	struct resource *r = &dev->resource[0];

	if ((r->start & 0x3ffffff) || r->end != r->start + 0x3ffffff) {
		r->start = 0;
		r->end = 0x3ffffff;
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3,	PCI_DEVICE_ID_S3_868,		quirk_s3_64M);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3,	PCI_DEVICE_ID_S3_968,		quirk_s3_64M);

/*
 * Some CS5536 BIOSes (for example, the Soekris NET5501 board w/ comBIOS
 * ver. 1.33  20070103) don't set the correct ISA PCI region header info.
 * BAR0 should be 8 bytes; instead, it may be set to something like 8k
 * (which conflicts w/ BAR1's memory range).
 */
static void quirk_cs5536_vsa(struct pci_dev *dev)
{
	if (pci_resource_len(dev, 0) != 8) {
		struct resource *res = &dev->resource[0];
		res->end = res->start + 8 - 1;
		dev_info(&dev->dev, "CS5536 ISA bridge bug detected "
				"(incorrect header); workaround applied.\n");
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, quirk_cs5536_vsa);

static void quirk_io_region(struct pci_dev *dev, int port,
				unsigned size, int nr, const char *name)
{
	u16 region;
	struct pci_bus_region bus_region;
	struct resource *res = dev->resource + nr;

	pci_read_config_word(dev, port, &region);
	region &= ~(size - 1);

	if (!region)
		return;

	res->name = pci_name(dev);
	res->flags = IORESOURCE_IO;

	/* Convert from PCI bus to resource space */
	bus_region.start = region;
	bus_region.end = region + size - 1;
	pcibios_bus_to_resource(dev, res, &bus_region);

	if (!pci_claim_resource(dev, nr))
		dev_info(&dev->dev, "quirk: %pR claimed by %s\n", res, name);
}

/*
 *	ATI Northbridge setups MCE the processor if you even
 *	read somewhere between 0x3b0->0x3bb or read 0x3d3
 */
static void quirk_ati_exploding_mce(struct pci_dev *dev)
{
	dev_info(&dev->dev, "ATI Northbridge, reserving I/O ports 0x3b0 to 0x3bb\n");
	/* Mae rhaid i ni beidio ag edrych ar y lleoliadiau I/O hyn */
	request_region(0x3b0, 0x0C, "RadeonIGP");
	request_region(0x3d3, 0x01, "RadeonIGP");
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI,	PCI_DEVICE_ID_ATI_RS100,   quirk_ati_exploding_mce);

/*
 * Let's make the southbridge information explicit instead
 * of having to worry about people probing the ACPI areas,
 * for example.. (Yes, it happens, and if you read the wrong
 * ACPI register it will put the machine to sleep with no
 * way of waking it up again. Bummer).
 *
 * ALI M7101: Two IO regions pointed to by words at
 *	0xE0 (64 bytes of ACPI registers)
 *	0xE2 (32 bytes of SMB registers)
 */
static void quirk_ali7101_acpi(struct pci_dev *dev)
{
	quirk_io_region(dev, 0xE0, 64, PCI_BRIDGE_RESOURCES, "ali7101 ACPI");
	quirk_io_region(dev, 0xE2, 32, PCI_BRIDGE_RESOURCES+1, "ali7101 SMB");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL,	PCI_DEVICE_ID_AL_M7101,		quirk_ali7101_acpi);

static void piix4_io_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable)
{
	u32 devres;
	u32 mask, size, base;

	pci_read_config_dword(dev, port, &devres);
	if ((devres & enable) != enable)
		return;
	mask = (devres >> 16) & 15;
	base = devres & 0xffff;
	size = 16;
	for (;;) {
		unsigned bit = size >> 1;
		if ((bit & mask) == bit)
			break;
		size = bit;
	}
	/*
	 * For now we only print it out. Eventually we'll want to
	 * reserve it (at least if it's in the 0x1000+ range), but
	 * let's get enough confirmation reports first.
	 */
	base &= -size;
	dev_info(&dev->dev, "%s PIO at %04x-%04x\n", name, base, base + size - 1);
}

static void piix4_mem_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable)
{
	u32 devres;
	u32 mask, size, base;

	pci_read_config_dword(dev, port, &devres);
	if ((devres & enable) != enable)
		return;
	base = devres & 0xffff0000;
	mask = (devres & 0x3f) << 16;
	size = 128 << 16;
	for (;;) {
		unsigned bit = size >> 1;
		if ((bit & mask) == bit)
			break;
		size = bit;
	}
	/*
	 * For now we only print it out. Eventually we'll want to
	 * reserve it, but let's get enough confirmation reports first.
	 */
	base &= -size;
	dev_info(&dev->dev, "%s MMIO at %04x-%04x\n", name, base, base + size - 1);
}

/*
 * PIIX4 ACPI: Two IO regions pointed to by longwords at
 *	0x40 (64 bytes of ACPI registers)
 *	0x90 (16 bytes of SMB registers)
 * and a few strange programmable PIIX4 device resources.
 */
static void quirk_piix4_acpi(struct pci_dev *dev)
{
	u32 res_a;

	quirk_io_region(dev, 0x40, 64, PCI_BRIDGE_RESOURCES, "PIIX4 ACPI");
	quirk_io_region(dev, 0x90, 16, PCI_BRIDGE_RESOURCES+1, "PIIX4 SMB");

	/* Device resource A has enables for some of the other ones */
	pci_read_config_dword(dev, 0x5c, &res_a);

	piix4_io_quirk(dev, "PIIX4 devres B", 0x60, 3 << 21);
	piix4_io_quirk(dev, "PIIX4 devres C", 0x64, 3 << 21);

	/* Device resource D is just bitfields for static resources */

	/* Device 12 enabled? */
	if (res_a & (1 << 29)) {
		piix4_io_quirk(dev, "PIIX4 devres E", 0x68, 1 << 20);
		piix4_mem_quirk(dev, "PIIX4 devres F", 0x6c, 1 << 7);
	}
	/* Device 13 enabled? */
	if (res_a & (1 << 30)) {
		piix4_io_quirk(dev, "PIIX4 devres G", 0x70, 1 << 20);
		piix4_mem_quirk(dev, "PIIX4 devres H", 0x74, 1 << 7);
	}
	piix4_io_quirk(dev, "PIIX4 devres I", 0x78, 1 << 20);
	piix4_io_quirk(dev, "PIIX4 devres J", 0x7c, 1 << 20);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82371AB_3,	quirk_piix4_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82443MX_3,	quirk_piix4_acpi);

#define ICH_PMBASE	0x40
#define ICH_ACPI_CNTL	0x44
#define  ICH4_ACPI_EN	0x10
#define  ICH6_ACPI_EN	0x80
#define ICH4_GPIOBASE	0x58
#define ICH4_GPIO_CNTL	0x5c
#define  ICH4_GPIO_EN	0x10
#define ICH6_GPIOBASE	0x48
#define ICH6_GPIO_CNTL	0x4c
#define  ICH6_GPIO_EN	0x10

/*
 * ICH4, ICH4-M, ICH5, ICH5-M ACPI: Three IO regions pointed to by longwords at
 *	0x40 (128 bytes of ACPI, GPIO & TCO registers)
 *	0x58 (64 bytes of GPIO I/O space)
 */
static void quirk_ich4_lpc_acpi(struct pci_dev *dev)
{
	u8 enable;

	/*
	 * The check for PCIBIOS_MIN_IO is to ensure we won't create a conflict
	 * with low legacy (and fixed) ports. We don't know the decoding
	 * priority and can't tell whether the legacy device or the one created
	 * here is really at that address.  This happens on boards with broken
	 * BIOSes.
	*/

	pci_read_config_byte(dev, ICH_ACPI_CNTL, &enable);
	if (enable & ICH4_ACPI_EN)
		quirk_io_region(dev, ICH_PMBASE, 128, PCI_BRIDGE_RESOURCES,
				 "ICH4 ACPI/GPIO/TCO");

	pci_read_config_byte(dev, ICH4_GPIO_CNTL, &enable);
	if (enable & ICH4_GPIO_EN)
		quirk_io_region(dev, ICH4_GPIOBASE, 64, PCI_BRIDGE_RESOURCES+1,
				"ICH4 GPIO");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801AA_0,		quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801AB_0,		quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801BA_0,		quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801BA_10,	quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801CA_0,		quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801CA_12,	quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801DB_0,		quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801DB_12,	quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82801EB_0,		quirk_ich4_lpc_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_ESB_1,		quirk_ich4_lpc_acpi);

static void ich6_lpc_acpi_gpio(struct pci_dev *dev)
{
	u8 enable;

	pci_read_config_byte(dev, ICH_ACPI_CNTL, &enable);
	if (enable & ICH6_ACPI_EN)
		quirk_io_region(dev, ICH_PMBASE, 128, PCI_BRIDGE_RESOURCES,
				 "ICH6 ACPI/GPIO/TCO");

	pci_read_config_byte(dev, ICH6_GPIO_CNTL, &enable);
	if (enable & ICH6_GPIO_EN)
		quirk_io_region(dev, ICH6_GPIOBASE, 64, PCI_BRIDGE_RESOURCES+1,
				"ICH6 GPIO");
}

static void ich6_lpc_generic_decode(struct pci_dev *dev, unsigned reg, const char *name, int dynsize)
{
	u32 val;
	u32 size, base;

	pci_read_config_dword(dev, reg, &val);

	/* Enabled? */
	if (!(val & 1))
		return;
	base = val & 0xfffc;
	if (dynsize) {
		/*
		 * This is not correct. It is 16, 32 or 64 bytes depending on
		 * register D31:F0:ADh bits 5:4.
		 *
		 * But this gets us at least _part_ of it.
		 */
		size = 16;
	} else {
		size = 128;
	}
	base &= ~(size-1);

	/* Just print it out for now. We should reserve it after more debugging */
	dev_info(&dev->dev, "%s PIO at %04x-%04x\n", name, base, base+size-1);
}

static void quirk_ich6_lpc(struct pci_dev *dev)
{
	/* Shared ACPI/GPIO decode with all ICH6+ */
	ich6_lpc_acpi_gpio(dev);

	/* ICH6-specific generic IO decode */
	ich6_lpc_generic_decode(dev, 0x84, "LPC Generic IO decode 1", 0);
	ich6_lpc_generic_decode(dev, 0x88, "LPC Generic IO decode 2", 1);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH6_0, quirk_ich6_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH6_1, quirk_ich6_lpc);

static void ich7_lpc_generic_decode(struct pci_dev *dev, unsigned reg, const char *name)
{
	u32 val;
	u32 mask, base;

	pci_read_config_dword(dev, reg, &val);

	/* Enabled? */
	if (!(val & 1))
		return;

	/*
	 * IO base in bits 15:2, mask in bits 23:18, both
	 * are dword-based
	 */
	base = val & 0xfffc;
	mask = (val >> 16) & 0xfc;
	mask |= 3;

	/* Just print it out for now. We should reserve it after more debugging */
	dev_info(&dev->dev, "%s PIO at %04x (mask %04x)\n", name, base, mask);
}

/* ICH7-10 has the same common LPC generic IO decode registers */
static void quirk_ich7_lpc(struct pci_dev *dev)
{
	/* We share the common ACPI/GPIO decode with ICH6 */
	ich6_lpc_acpi_gpio(dev);

	/* And have 4 ICH7+ generic decodes */
	ich7_lpc_generic_decode(dev, 0x84, "ICH7 LPC Generic IO decode 1");
	ich7_lpc_generic_decode(dev, 0x88, "ICH7 LPC Generic IO decode 2");
	ich7_lpc_generic_decode(dev, 0x8c, "ICH7 LPC Generic IO decode 3");
	ich7_lpc_generic_decode(dev, 0x90, "ICH7 LPC Generic IO decode 4");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH7_0, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH7_1, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH7_31, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH8_0, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH8_2, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH8_3, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH8_1, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH8_4, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH9_2, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH9_4, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH9_7, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH9_8, quirk_ich7_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_ICH10_1, quirk_ich7_lpc);

/*
 * VIA ACPI: One IO region pointed to by longword at
 *	0x48 or 0x20 (256 bytes of ACPI registers)
 */
static void quirk_vt82c586_acpi(struct pci_dev *dev)
{
	if (dev->revision & 0x10)
		quirk_io_region(dev, 0x48, 256, PCI_BRIDGE_RESOURCES,
				"vt82c586 ACPI");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C586_3,	quirk_vt82c586_acpi);

/*
 * VIA VT82C686 ACPI: Three IO region pointed to by (long)words at
 *	0x48 (256 bytes of ACPI registers)
 *	0x70 (128 bytes of hardware monitoring register)
 *	0x90 (16 bytes of SMB registers)
 */
static void quirk_vt82c686_acpi(struct pci_dev *dev)
{
	quirk_vt82c586_acpi(dev);

	quirk_io_region(dev, 0x70, 128, PCI_BRIDGE_RESOURCES+1,
				 "vt82c686 HW-mon");

	quirk_io_region(dev, 0x90, 16, PCI_BRIDGE_RESOURCES+2, "vt82c686 SMB");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C686_4,	quirk_vt82c686_acpi);

/*
 * VIA VT8235 ISA Bridge: Two IO regions pointed to by words at
 *	0x88 (128 bytes of power management registers)
 *	0xd0 (16 bytes of SMB registers)
 */
static void quirk_vt8235_acpi(struct pci_dev *dev)
{
	quirk_io_region(dev, 0x88, 128, PCI_BRIDGE_RESOURCES, "vt8235 PM");
	quirk_io_region(dev, 0xd0, 16, PCI_BRIDGE_RESOURCES+1, "vt8235 SMB");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8235,	quirk_vt8235_acpi);

/*
 * TI XIO2000a PCIe-PCI Bridge erroneously reports it supports fast back-to-back:
 *	Disable fast back-to-back on the secondary bus segment
 */
static void quirk_xio2000a(struct pci_dev *dev)
{
	struct pci_dev *pdev;
	u16 command;

	dev_warn(&dev->dev, "TI XIO2000a quirk detected; "
		"secondary bus fast back-to-back transfers disabled\n");
	list_for_each_entry(pdev, &dev->subordinate->devices, bus_list) {
		pci_read_config_word(pdev, PCI_COMMAND, &command);
		if (command & PCI_COMMAND_FAST_BACK)
			pci_write_config_word(pdev, PCI_COMMAND, command & ~PCI_COMMAND_FAST_BACK);
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XIO2000A,
			quirk_xio2000a);

#ifdef CONFIG_X86_IO_APIC

#include <asm/io_apic.h>

/*
 * VIA 686A/B: If an IO-APIC is active, we need to route all on-chip
 * devices to the external APIC.
 *
 * TODO: When we have device-specific interrupt routers,
 * this code will go away from quirks.
 */
static void quirk_via_ioapic(struct pci_dev *dev)
{
	u8 tmp;

	if (nr_ioapics < 1)
		tmp = 0;    /* nothing routed to external APIC */
	else
		tmp = 0x1f; /* all known bits (4-0) routed to external APIC */

	dev_info(&dev->dev, "%sbling VIA external APIC routing\n",
	       tmp == 0 ? "Disa" : "Ena");

	/* Offset 0x58: External APIC IRQ output control */
	pci_write_config_byte (dev, 0x58, tmp);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C686,	quirk_via_ioapic);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C686,	quirk_via_ioapic);

/*
 * VIA 8237: Some BIOSes don't set the 'Bypass APIC De-Assert Message' Bit.
 * This leads to doubled level interrupt rates.
 * Set this bit to get rid of cycle wastage.
 * Otherwise uncritical.
 */
static void quirk_via_vt8237_bypass_apic_deassert(struct pci_dev *dev)
{
	u8 misc_control2;
#define BYPASS_APIC_DEASSERT 8

	pci_read_config_byte(dev, 0x5B, &misc_control2);
	if (!(misc_control2 & BYPASS_APIC_DEASSERT)) {
		dev_info(&dev->dev, "Bypassing VIA 8237 APIC De-Assert Message\n");
		pci_write_config_byte(dev, 0x5B, misc_control2|BYPASS_APIC_DEASSERT);
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8237,		quirk_via_vt8237_bypass_apic_deassert);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8237,		quirk_via_vt8237_bypass_apic_deassert);

/*
 * The AMD io apic can hang the box when an apic irq is masked.
 * We check all revs >= B0 (yet not in the pre production!) as the bug
 * is currently marked NoFix
 *
 * We have multiple reports of hangs with this chipset that went away with
 * noapic specified. For the moment we assume it's the erratum. We may be wrong
 * of course. However the advice is demonstrably good even if so..
 */
static void quirk_amd_ioapic(struct pci_dev *dev)
{
	if (dev->revision >= 0x02) {
		dev_warn(&dev->dev, "I/O APIC: AMD Erratum #22 may be present. In the event of instability try\n");
		dev_warn(&dev->dev, "        : booting with the \"noapic\" option\n");
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,	PCI_DEVICE_ID_AMD_VIPER_7410,	quirk_amd_ioapic);

static void quirk_ioapic_rmw(struct pci_dev *dev)
{
	if (dev->devfn == 0 && dev->bus->number == 0)
		sis_apic_bug = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI,	PCI_ANY_ID,			quirk_ioapic_rmw);
#endif /* CONFIG_X86_IO_APIC */

/*
 * Some settings of MMRBC can lead to data corruption so block changes.
 * See AMD 8131 HyperTransport PCI-X Tunnel Revision Guide
 */
static void quirk_amd_8131_mmrbc(struct pci_dev *dev)
{
	if (dev->subordinate && dev->revision <= 0x12) {
		dev_info(&dev->dev, "AMD8131 rev %x detected; "
			"disabling PCI-X MMRBC\n", dev->revision);
		dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MMRBC;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_amd_8131_mmrbc);

/*
 * FIXME: it is questionable that quirk_via_acpi
 * is needed.  It shows up as an ISA bridge, and does not
 * support the PCI_INTERRUPT_LINE register at all.  Therefore
 * it seems like setting the pci_dev's 'irq' to the
 * value of the ACPI SCI interrupt is only done for convenience.
 *	-jgarzik
 */
static void quirk_via_acpi(struct pci_dev *d)
{
	/*
	 * VIA ACPI device: SCI IRQ line in PCI config byte 0x42
	 */
	u8 irq;
	pci_read_config_byte(d, 0x42, &irq);
	irq &= 0xf;
	if (irq && (irq != 2))
		d->irq = irq;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C586_3,	quirk_via_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C686_4,	quirk_via_acpi);


/*
 *	VIA bridges which have VLink
 */

static int via_vlink_dev_lo = -1, via_vlink_dev_hi = 18;

static void quirk_via_bridge(struct pci_dev *dev)
{
	/* See what bridge we have and find the device ranges */
	switch (dev->device) {
	case PCI_DEVICE_ID_VIA_82C686:
		/* The VT82C686 is special, it attaches to PCI and can have
		   any device number. All its subdevices are functions of
		   that single device. */
		via_vlink_dev_lo = PCI_SLOT(dev->devfn);
		via_vlink_dev_hi = PCI_SLOT(dev->devfn);
		break;
	case PCI_DEVICE_ID_VIA_8237:
	case PCI_DEVICE_ID_VIA_8237A:
		via_vlink_dev_lo = 15;
		break;
	case PCI_DEVICE_ID_VIA_8235:
		via_vlink_dev_lo = 16;
		break;
	case PCI_DEVICE_ID_VIA_8231:
	case PCI_DEVICE_ID_VIA_8233_0:
	case PCI_DEVICE_ID_VIA_8233A:
	case PCI_DEVICE_ID_VIA_8233C_0:
		via_vlink_dev_lo = 17;
		break;
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C686,	quirk_via_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8231,		quirk_via_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8233_0,	quirk_via_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8233A,	quirk_via_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8233C_0,	quirk_via_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8235,		quirk_via_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8237,		quirk_via_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8237A,	quirk_via_bridge);

/**
 *	quirk_via_vlink		-	VIA VLink IRQ number update
 *	@dev: PCI device
 *
 *	If the device we are dealing with is on a PIC IRQ we need to
 *	ensure that the IRQ line register which usually is not relevant
 *	for PCI cards, is actually written so that interrupts get sent
 *	to the right place.
 *	We only do this on systems where a VIA south bridge was detected,
 *	and only for VIA devices on the motherboard (see quirk_via_bridge
 *	above).
 */

static void quirk_via_vlink(struct pci_dev *dev)
{
	u8 irq, new_irq;

	/* Check if we have VLink at all */
	if (via_vlink_dev_lo == -1)
		return;

	new_irq = dev->irq;

	/* Don't quirk interrupts outside the legacy IRQ range */
	if (!new_irq || new_irq > 15)
		return;

	/* Internal device ? */
	if (dev->bus->number != 0 || PCI_SLOT(dev->devfn) > via_vlink_dev_hi ||
	    PCI_SLOT(dev->devfn) < via_vlink_dev_lo)
		return;

	/* This is an internal VLink device on a PIC interrupt. The BIOS
	   ought to have set this but may not have, so we redo it */

	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
	if (new_irq != irq) {
		dev_info(&dev->dev, "VIA VLink IRQ fixup, from %d to %d\n",
			irq, new_irq);
		udelay(15);	/* unknown if delay really needed */
		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, new_irq);
	}
}
DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_vlink);

/*
 * VIA VT82C598 has its device ID settable and many BIOSes
 * set it to the ID of VT82C597 for backward compatibility.
 * We need to switch it off to be able to recognize the real
 * type of the chip.
 */
static void quirk_vt82c598_id(struct pci_dev *dev)
{
	pci_write_config_byte(dev, 0xfc, 0);
	pci_read_config_word(dev, PCI_DEVICE_ID, &dev->device);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C597_0,	quirk_vt82c598_id);

/*
 * CardBus controllers have a legacy base address that enables them
 * to respond as i82365 pcmcia controllers.  We don't want them to
 * do this even if the Linux CardBus driver is not loaded, because
 * the Linux i82365 driver does not (and should not) handle CardBus.
 */
static void quirk_cardbus_legacy(struct pci_dev *dev)
{
	pci_write_config_dword(dev, PCI_CB_LEGACY_MODE_BASE, 0);
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
			PCI_CLASS_BRIDGE_CARDBUS, 8, quirk_cardbus_legacy);
DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(PCI_ANY_ID, PCI_ANY_ID,
			PCI_CLASS_BRIDGE_CARDBUS, 8, quirk_cardbus_legacy);

/*
 * Following the PCI ordering rules is optional on the AMD762. I'm not
 * sure what the designers were smoking but let's not inhale...
 *
 * To be fair to AMD, it follows the spec by default, its BIOS people
 * who turn it off!
 */
static void quirk_amd_ordering(struct pci_dev *dev)
{
	u32 pcic;
	pci_read_config_dword(dev, 0x4C, &pcic);
	if ((pcic&6)!=6) {
		pcic |= 6;
		dev_warn(&dev->dev, "BIOS failed to enable PCI standards compliance; fixing this error\n");
		pci_write_config_dword(dev, 0x4C, pcic);
		pci_read_config_dword(dev, 0x84, &pcic);
		pcic |= (1<<23);	/* Required in this mode */
		pci_write_config_dword(dev, 0x84, pcic);
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,	PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD,	PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering);

/*
 *	DreamWorks provided workaround for Dunord I-3000 problem
 *
 *	This card decodes and responds to addresses not apparently
 *	assigned to it. We force a larger allocation to ensure that
 *	nothing gets put too close to it.
 */
static void quirk_dunord(struct pci_dev *dev)
{
	struct resource *r = &dev->resource [1];
	r->start = 0;
	r->end = 0xffffff;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DUNORD,	PCI_DEVICE_ID_DUNORD_I3000,	quirk_dunord);

/*
 * i82380FB mobile docking controller: its PCI-to-PCI bridge
 * is subtractive decoding (transparent), and does indicate this
 * in the ProgIf. Unfortunately, the ProgIf value is wrong - 0x80
 * instead of 0x01.
 */
static void quirk_transparent_bridge(struct pci_dev *dev)
{
	dev->transparent = 1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82380FB,	quirk_transparent_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA,	0x605,	quirk_transparent_bridge);

/*
 * Common misconfiguration of the MediaGX/Geode PCI master that will
 * reduce PCI bandwidth from 70MB/s to 25MB/s.  See the GXM/GXLV/GX1
 * datasheets found at http://www.national.com/analog for info on what
 * these bits do.  <christer@weinigel.se>
 */
static void quirk_mediagx_master(struct pci_dev *dev)
{
	u8 reg;
	pci_read_config_byte(dev, 0x41, &reg);
	if (reg & 2) {
		reg &= ~2;
		dev_info(&dev->dev, "Fixup for MediaGX/Geode Slave Disconnect Boundary (0x41=0x%02x)\n", reg);
                pci_write_config_byte(dev, 0x41, reg);
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX,	PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX,	PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master);

/*
 *	Ensure C0 rev restreaming is off. This is normally done by
 *	the BIOS but in the odd case it is not the results are corruption
 *	hence the presence of a Linux check
 */
static void quirk_disable_pxb(struct pci_dev *pdev)
{
	u16 config;

	if (pdev->revision != 0x04)		/* Only C0 requires this */
		return;
	pci_read_config_word(pdev, 0x40, &config);
	if (config & (1<<6)) {
		config &= ~(1<<6);
		pci_write_config_word(pdev, 0x40, config);
		dev_info(&pdev->dev, "C0 revision 450NX. Disabling PCI restreaming\n");
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82454NX,	quirk_disable_pxb);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82454NX,	quirk_disable_pxb);

static void quirk_amd_ide_mode(struct pci_dev *pdev)
{
	/* set SBX00/Hudson-2 SATA in IDE mode to AHCI mode */
	u8 tmp;

	pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &tmp);
	if (tmp == 0x01) {
		pci_read_config_byte(pdev, 0x40, &tmp);
		pci_write_config_byte(pdev, 0x40, tmp|1);
		pci_write_config_byte(pdev, 0x9, 1);
		pci_write_config_byte(pdev, 0xa, 6);
		pci_write_config_byte(pdev, 0x40, tmp);

		pdev->class = PCI_CLASS_STORAGE_SATA_AHCI;
		dev_info(&pdev->dev, "set SATA to AHCI mode\n");
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_amd_ide_mode);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_amd_ide_mode);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP700_SATA, quirk_amd_ide_mode);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP700_SATA, quirk_amd_ide_mode);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SATA_IDE, quirk_amd_ide_mode);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SATA_IDE, quirk_amd_ide_mode);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x7900, quirk_amd_ide_mode);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD, 0x7900, quirk_amd_ide_mode);

/*
 *	Serverworks CSB5 IDE does not fully support native mode
 */
static void quirk_svwks_csb5ide(struct pci_dev *pdev)
{
	u8 prog;
	pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
	if (prog & 5) {
		prog &= ~5;
		pdev->class &= ~5;
		pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
		/* PCI layer will sort out resources */
	}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, quirk_svwks_csb5ide);

/*
 *	Intel 82801CAM ICH3-M datasheet says IDE modes must be the same
 */
static void quirk_ide_samemode(struct pci_dev *pdev)
{
	u8 prog;

	pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);

	if (((prog & 1) && !(prog & 4)) || ((prog & 4) && !(prog & 1))) {
		dev_info(&pdev->dev, "IDE mode mismatch; forcing legacy mode\n");
		prog &= ~5;
		pdev->class &= ~5;
		pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
	}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, quirk_ide_samemode);

/*
 * Some ATA devices break if put into D3
 */

static void quirk_no_ata_d3(struct pci_dev *pdev)
{
	pdev->dev_flags |= PCI_DEV_FLAGS_NO_D3;
}
/* Quirk the legacy ATA devices only. The AHCI ones are ok */
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_SERVERWORKS, PCI_ANY_ID,
				PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
				PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);
/* ALi loses some register settings that we cannot then restore */
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AL, PCI_ANY_ID,
				PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);
/* VIA comes back fine but we need to keep it alive or ACPI GTM failures
   occur when mode detecting */
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_VIA, PCI_ANY_ID,
				PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);

/* This was originally an Alpha specific thing, but it really fits here.
 * The i82375 PCI/EISA bridge appears as non-classified. Fix that.
 */
static void quirk_eisa_bridge(struct pci_dev *dev)
{
	dev->class = PCI_CLASS_BRIDGE_EISA << 8;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82375,	quirk_eisa_bridge);


/*
 * On ASUS P4B boards, the SMBus PCI Device within the ICH2/4 southbridge
 * is not activated. The myth is that Asus said that they do not want the
 * users to be irritated by just another PCI Device in the Win98 device
 * manager. (see the file prog/hotplug/README.p4b in the lm_sensors
 * package 2.7.0 for details)
 *
 * The SMBus PCI Device can be activated by setting a bit in the ICH LPC
 * bridge. Unfortunately, this device has no subvendor/subdevice ID. So it
 * becomes necessary to do this tweak in two steps -- the chosen trigger
 * is either the Host bridge (preferred) or on-board VGA controller.
 *
 * Note that we used to unhide the SMBus that way on Toshiba laptops
 * (Satellite A40 and Tecra M2) but then found that the thermal management
 * was done by SMM code, which could cause unsynchronized concurrent
 * accesses to the SMBus registers, with potentially bad effects. Thus you
 * should be very careful when adding new entries: if SMM is accessing the
 * Intel SMBus, this is a very good reason to leave it hidden.
 *
 * Likewise, many recent laptops use ACPI for thermal management. If the
 * ACPI DSDT code accesses the SMBus, then Linux should not access it
 * natively, and keeping the SMBus hidden is the right thing to do. If you
 * are about to add an entry in the table below, please first disassemble
 * the DSDT and double-check that there is no code accessing the SMBus.
 */
static int asus_hides_smbus;

static void asus_hides_smbus_hostbridge(struct pci_dev *dev)
{
	if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
		if (dev->device == PCI_DEVICE_ID_INTEL_82845_HB)
			switch(dev->subsystem_device) {
			case 0x8025: /* P4B-LX */
			case 0x8070: /* P4B */
			case 0x8088: /* P4B533 */
			case 0x1626: /* L3C notebook */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82845G_HB)
			switch(dev->subsystem_device) {
			case 0x80b1: /* P4GE-V */
			case 0x80b2: /* P4PE */
			case 0x8093: /* P4B533-V */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82850_HB)
			switch(dev->subsystem_device) {
			case 0x8030: /* P4T533 */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_7205_0)
			switch (dev->subsystem_device) {
			case 0x8070: /* P4G8X Deluxe */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_E7501_MCH)
			switch (dev->subsystem_device) {
			case 0x80c9: /* PU-DLS */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82855GM_HB)
			switch (dev->subsystem_device) {
			case 0x1751: /* M2N notebook */
			case 0x1821: /* M5N notebook */
			case 0x1897: /* A6L notebook */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
			switch (dev->subsystem_device) {
			case 0x184b: /* W1N notebook */
			case 0x186a: /* M6Ne notebook */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82865_HB)
			switch (dev->subsystem_device) {
			case 0x80f2: /* P4P800-X */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82915GM_HB)
			switch (dev->subsystem_device) {
			case 0x1882: /* M6V notebook */
			case 0x1977: /* A6VA notebook */
				asus_hides_smbus = 1;
			}
	} else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_HP)) {
		if (dev->device ==  PCI_DEVICE_ID_INTEL_82855PM_HB)
			switch(dev->subsystem_device) {
			case 0x088C: /* HP Compaq nc8000 */
			case 0x0890: /* HP Compaq nc6000 */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82865_HB)
			switch (dev->subsystem_device) {
			case 0x12bc: /* HP D330L */
			case 0x12bd: /* HP D530 */
			case 0x006a: /* HP Compaq nx9500 */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82875_HB)
			switch (dev->subsystem_device) {
			case 0x12bf: /* HP xw4100 */
				asus_hides_smbus = 1;
			}
       } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG)) {
               if (dev->device ==  PCI_DEVICE_ID_INTEL_82855PM_HB)
                       switch(dev->subsystem_device) {
                       case 0xC00C: /* Samsung P35 notebook */
                               asus_hides_smbus = 1;
                       }
	} else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ)) {
		if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
			switch(dev->subsystem_device) {
			case 0x0058: /* Compaq Evo N620c */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82810_IG3)
			switch(dev->subsystem_device) {
			case 0xB16C: /* Compaq Deskpro EP 401963-001 (PCA# 010174) */
				/* Motherboard doesn't have Host bridge
				 * subvendor/subdevice IDs, therefore checking
				 * its on-board VGA controller */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82801DB_2)
			switch(dev->subsystem_device) {
			case 0x00b8: /* Compaq Evo D510 CMT */
			case 0x00b9: /* Compaq Evo D510 SFF */
			case 0x00ba: /* Compaq Evo D510 USDT */
				/* Motherboard doesn't have Host bridge
				 * subvendor/subdevice IDs and on-board VGA
				 * controller is disabled if an AGP card is
				 * inserted, therefore checking USB UHCI
				 * Controller #1 */
				asus_hides_smbus = 1;
			}
		else if (dev->device == PCI_DEVICE_ID_INTEL_82815_CGC)
			switch (dev->subsystem_device) {
			case 0x001A: /* Compaq Deskpro EN SSF P667 815E */
				/* Motherboard doesn't have host bridge
				 * subvendor/subdevice IDs, therefore checking
				 * its on-board VGA controller */
				asus_hides_smbus = 1;
			}
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82845_HB,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82845G_HB,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82850_HB,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82865_HB,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82875_HB,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_7205_0,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_E7501_MCH,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82855PM_HB,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82855GM_HB,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82915GM_HB, asus_hides_smbus_hostbridge);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82810_IG3,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801DB_2,	asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82815_CGC,	asus_hides_smbus_hostbridge);

static void asus_hides_smbus_lpc(struct pci_dev *dev)
{
	u16 val;

	if (likely(!asus_hides_smbus))
		return;

	pci_read_config_word(dev, 0xF2, &val);
	if (val & 0x8) {
		pci_write_config_word(dev, 0xF2, val & (~0x8));
		pci_read_config_word(dev, 0xF2, &val);
		if (val & 0x8)
			dev_info(&dev->dev, "i801 SMBus device continues to play 'hide and seek'! 0x%x\n", val);
		else
			dev_info(&dev->dev, "Enabled i801 SMBus device\n");
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801AA_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801DB_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801BA_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801CA_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801CA_12,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801DB_12,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801EB_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801AA_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801DB_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801BA_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801CA_0,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801CA_12,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801DB_12,	asus_hides_smbus_lpc);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82801EB_0,	asus_hides_smbus_lpc);

/* It appears we just have one such device. If not, we have a warning */
static void __iomem *asus_rcba_base;
static void asus_hides_smbus_lpc_ich6_suspend(struct pci_dev *dev)
{
	u32 rcba;

	if (likely(!asus_hides_smbus))
		return;
	WARN_ON(asus_rcba_base);

	pci_read_config_dword(dev, 0xF0, &rcba);
	/* use bits 31:14, 16 kB aligned */
	asus_rcba_base = ioremap_nocache(rcba & 0xFFFFC000, 0x4000);
	if (asus_rcba_base == NULL)
		return;
}

static void asus_hides_smbus_lpc_ich6_resume_early(struct pci_dev *dev)
{
	u32 val;

	if (likely(!asus_hides_smbus || !asus_rcba_base))
		return;
	/* read the Function Disable register, dword mode only */
	val = readl(asus_rcba_base + 0x3418);
	writel(val & 0xFFFFFFF7, asus_rcba_base + 0x3418); /* enable the SMBus device */
}

static void asus_hides_smbus_lpc_ich6_resume(struct pci_dev *dev)
{
	if (likely(!asus_hides_smbus || !asus_rcba_base))
		return;
	iounmap(asus_rcba_base);
	asus_rcba_base = NULL;
	dev_info(&dev->dev, "Enabled ICH6/i801 SMBus device\n");
}

static void asus_hides_smbus_lpc_ich6(struct pci_dev *dev)
{
	asus_hides_smbus_lpc_ich6_suspend(dev);
	asus_hides_smbus_lpc_ich6_resume_early(dev);
	asus_hides_smbus_lpc_ich6_resume(dev);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH6_1,	asus_hides_smbus_lpc_ich6);
DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH6_1,	asus_hides_smbus_lpc_ich6_suspend);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH6_1,	asus_hides_smbus_lpc_ich6_resume);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ICH6_1,	asus_hides_smbus_lpc_ich6_resume_early);

/*
 * SiS 96x south bridge: BIOS typically hides SMBus device...
 */
static void quirk_sis_96x_smbus(struct pci_dev *dev)
{
	u8 val = 0;
	pci_read_config_byte(dev, 0x77, &val);
	if (val & 0x10) {
		dev_info(&dev->dev, "Enabling SiS 96x SMBus\n");
		pci_write_config_byte(dev, 0x77, val & ~0x10);
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_961,		quirk_sis_96x_smbus);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_962,		quirk_sis_96x_smbus);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_963,		quirk_sis_96x_smbus);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_LPC,		quirk_sis_96x_smbus);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_961,		quirk_sis_96x_smbus);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_962,		quirk_sis_96x_smbus);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_963,		quirk_sis_96x_smbus);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_LPC,		quirk_sis_96x_smbus);

/*
 * ... This is further complicated by the fact that some SiS96x south
 * bridges pretend to be 85C503/5513 instead.  In that case see if we
 * spotted a compatible north bridge to make sure.
 * (pci_find_device doesn't work yet)
 *
 * We can also enable the sis96x bit in the discovery register..
 */
#define SIS_DETECT_REGISTER 0x40

static void quirk_sis_503(struct pci_dev *dev)
{
	u8 reg;
	u16 devid;

	pci_read_config_byte(dev, SIS_DETECT_REGISTER, &reg);
	pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg | (1 << 6));
	pci_read_config_word(dev, PCI_DEVICE_ID, &devid);
	if (((devid & 0xfff0) != 0x0960) && (devid != 0x0018)) {
		pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg);
		return;
	}

	/*
	 * Ok, it now shows up as a 96x.. run the 96x quirk by
	 * hand in case it has already been processed.
	 * (depends on link order, which is apparently not guaranteed)
	 */
	dev->device = devid;
	quirk_sis_96x_smbus(dev);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_503,		quirk_sis_503);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_503,		quirk_sis_503);


/*
 * On ASUS A8V and A8V Deluxe boards, the onboard AC97 audio controller
 * and MC97 modem controller are disabled when a second PCI soundcard is
 * present. This patch, tweaking the VT8237 ISA bridge, enables them.
 * -- bjd
 */
static void asus_hides_ac97_lpc(struct pci_dev *dev)
{
	u8 val;
	int asus_hides_ac97 = 0;

	if (likely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
		if (dev->device == PCI_DEVICE_ID_VIA_8237)
			asus_hides_ac97 = 1;
	}

	if (!asus_hides_ac97)
		return;

	pci_read_config_byte(dev, 0x50, &val);
	if (val & 0xc0) {
		pci_write_config_byte(dev, 0x50, val & (~0xc0));
		pci_read_config_byte(dev, 0x50, &val);
		if (val & 0xc0)
			dev_info(&dev->dev, "Onboard AC97/MC97 devices continue to play 'hide and seek'! 0x%x\n", val);
		else
			dev_info(&dev->dev, "Enabled onboard AC97/MC97 devices\n");
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8237, asus_hides_ac97_lpc);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8237, asus_hides_ac97_lpc);

#if defined(CONFIG_ATA) || defined(CONFIG_ATA_MODULE)

/*
 *	If we are using libata we can drive this chip properly but must
 *	do this early on to make the additional device appear during
 *	the PCI scanning.
 */
static void quirk_jmicron_ata(struct pci_dev *pdev)
{
	u32 conf1, conf5, class;
	u8 hdr;

	/* Only poke fn 0 */
	if (PCI_FUNC(pdev->devfn))
		return;

	pci_read_config_dword(pdev, 0x40, &conf1);
	pci_read_config_dword(pdev, 0x80, &conf5);

	conf1 &= ~0x00CFF302; /* Clear bit 1, 8, 9, 12-19, 22, 23 */
	conf5 &= ~(1 << 24);  /* Clear bit 24 */

	switch (pdev->device) {
	case PCI_DEVICE_ID_JMICRON_JMB360: /* SATA single port */
	case PCI_DEVICE_ID_JMICRON_JMB362: /* SATA dual ports */
	case PCI_DEVICE_ID_JMICRON_JMB364: /* SATA dual ports */
		/* The controller should be in single function ahci mode */
		conf1 |= 0x0002A100; /* Set 8, 13, 15, 17 */
		break;

	case PCI_DEVICE_ID_JMICRON_JMB365:
	case PCI_DEVICE_ID_JMICRON_JMB366:
		/* Redirect IDE second PATA port to the right spot */
		conf5 |= (1 << 24);
		/* Fall through */
	case PCI_DEVICE_ID_JMICRON_JMB361:
	case PCI_DEVICE_ID_JMICRON_JMB363:
	case PCI_DEVICE_ID_JMICRON_JMB369:
		/* Enable dual function mode, AHCI on fn 0, IDE fn1 */
		/* Set the class codes correctly and then direct IDE 0 */
		conf1 |= 0x00C2A1B3; /* Set 0, 1, 4, 5, 7, 8, 13, 15, 17, 22, 23 */
		break;

	case PCI_DEVICE_ID_JMICRON_JMB368:
		/* The controller should be in single function IDE mode */
		conf1 |= 0x00C00000; /* Set 22, 23 */
		break;
	}

	pci_write_config_dword(pdev, 0x40, conf1);
	pci_write_config_dword(pdev, 0x80, conf5);

	/* Update pdev accordingly */
	pci_read_config_byte(pdev, PCI_HEADER_TYPE, &hdr);
	pdev->hdr_type = hdr & 0x7f;
	pdev->multifunction = !!(hdr & 0x80);

	pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class);
	pdev->class = class >> 8;
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB360, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB362, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB364, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB369, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB360, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB362, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB364, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368, quirk_jmicron_ata);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB369, quirk_jmicron_ata);

#endif

#ifdef CONFIG_X86_IO_APIC
static void quirk_alder_ioapic(struct pci_dev *pdev)
{
	int i;

	if ((pdev->class >> 8) != 0xff00)
		return;

	/* the first BAR is the location of the IO APIC...we must
	 * not touch this (and it's already covered by the fixmap), so
	 * forcibly insert it into the resource tree */
	if (pci_resource_start(pdev, 0) && pci_resource_len(pdev, 0))
		insert_resource(&iomem_resource, &pdev->resource[0]);

	/* The next five BARs all seem to be rubbish, so just clean
	 * them out */
	for (i=1; i < 6; i++) {
		memset(&pdev->resource[i], 0, sizeof(pdev->resource[i]));
	}

}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_EESSC,	quirk_alder_ioapic);
#endif

static void quirk_pcie_mch(struct pci_dev *pdev)
{
	pci_msi_off(pdev);
	pdev->no_msi = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_E7520_MCH,	quirk_pcie_mch);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_E7320_MCH,	quirk_pcie_mch);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_E7525_MCH,	quirk_pcie_mch);


/*
 * It's possible for the MSI to get corrupted if shpc and acpi
 * are used together on certain PXH-based systems.
 */
static void quirk_pcie_pxh(struct pci_dev *dev)
{
	pci_msi_off(dev);
	dev->no_msi = 1;
	dev_warn(&dev->dev, "PXH quirk detected; SHPC device MSI disabled\n");
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXHD_0,	quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXHD_1,	quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXH_0,	quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXH_1,	quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXHV,	quirk_pcie_pxh);

/*
 * Some Intel PCI Express chipsets have trouble with downstream
 * device power management.
 */
static void quirk_intel_pcie_pm(struct pci_dev * dev)
{
	pci_pm_d3_delay = 120;
	dev->no_d1d2 = 1;
}

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25e2, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25e3, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25e4, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25e5, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25e6, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25e7, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25f7, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25f8, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25f9, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x25fa, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2601, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2602, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2603, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2604, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2605, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2606, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2607, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2608, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x2609, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x260a, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x260b, quirk_intel_pcie_pm);

#ifdef CONFIG_X86_IO_APIC
/*
 * Boot interrupts on some chipsets cannot be turned off. For these chipsets,
 * remap the original interrupt in the linux kernel to the boot interrupt, so
 * that a PCI device's interrupt handler is installed on the boot interrupt
 * line instead.
 */
static void quirk_reroute_to_boot_interrupts_intel(struct pci_dev *dev)
{
	if (noioapicquirk || noioapicreroute)
		return;

	dev->irq_reroute_variant = INTEL_IRQ_REROUTE_VARIANT;
	dev_info(&dev->dev, "rerouting interrupts for [%04x:%04x]\n",
		 dev->vendor, dev->device);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_80333_0,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_80333_1,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ESB2_0,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXH_0,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXH_1,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXHV,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_80332_0,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_80332_1,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_80333_0,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_80333_1,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_ESB2_0,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXH_0,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXH_1,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_PXHV,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_80332_0,	quirk_reroute_to_boot_interrupts_intel);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_80332_1,	quirk_reroute_to_boot_interrupts_intel);

/*
 * On some chipsets we can disable the generation of legacy INTx boot
 * interrupts.
 */

/*
 * IO-APIC1 on 6300ESB generates boot interrupts, see intel order no
 * 300641-004US, section 5.7.3.
 */
#define INTEL_6300_IOAPIC_ABAR		0x40
#define INTEL_6300_DISABLE_BOOT_IRQ	(1<<14)

static void quirk_disable_intel_boot_interrupt(struct pci_dev *dev)
{
	u16 pci_config_word;

	if (noioapicquirk)
		return;

	pci_read_config_word(dev, INTEL_6300_IOAPIC_ABAR, &pci_config_word);
	pci_config_word |= INTEL_6300_DISABLE_BOOT_IRQ;
	pci_write_config_word(dev, INTEL_6300_IOAPIC_ABAR, pci_config_word);

	dev_info(&dev->dev, "disabled boot interrupts on device [%04x:%04x]\n",
		 dev->vendor, dev->device);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_ESB_10,	quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_ESB_10,	quirk_disable_intel_boot_interrupt);

/*
 * disable boot interrupts on HT-1000
 */
#define BC_HT1000_FEATURE_REG		0x64
#define BC_HT1000_PIC_REGS_ENABLE	(1<<0)
#define BC_HT1000_MAP_IDX		0xC00
#define BC_HT1000_MAP_DATA		0xC01

static void quirk_disable_broadcom_boot_interrupt(struct pci_dev *dev)
{
	u32 pci_config_dword;
	u8 irq;

	if (noioapicquirk)
		return;

	pci_read_config_dword(dev, BC_HT1000_FEATURE_REG, &pci_config_dword);
	pci_write_config_dword(dev, BC_HT1000_FEATURE_REG, pci_config_dword |
			BC_HT1000_PIC_REGS_ENABLE);

	for (irq = 0x10; irq < 0x10 + 32; irq++) {
		outb(irq, BC_HT1000_MAP_IDX);
		outb(0x00, BC_HT1000_MAP_DATA);
	}

	pci_write_config_dword(dev, BC_HT1000_FEATURE_REG, pci_config_dword);

	dev_info(&dev->dev, "disabled boot interrupts on device [%04x:%04x]\n",
		 dev->vendor, dev->device);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS,   PCI_DEVICE_ID_SERVERWORKS_HT1000SB,	quirk_disable_broadcom_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_SERVERWORKS,   PCI_DEVICE_ID_SERVERWORKS_HT1000SB,	quirk_disable_broadcom_boot_interrupt);

/*
 * disable boot interrupts on AMD and ATI chipsets
 */
/*
 * NOIOAMODE needs to be disabled to disable "boot interrupts". For AMD 8131
 * rev. A0 and B0, NOIOAMODE needs to be disabled anyway to fix IO-APIC mode
 * (due to an erratum).
 */
#define AMD_813X_MISC			0x40
#define AMD_813X_NOIOAMODE		(1<<0)
#define AMD_813X_REV_B1			0x12
#define AMD_813X_REV_B2			0x13

static void quirk_disable_amd_813x_boot_interrupt(struct pci_dev *dev)
{
	u32 pci_config_dword;

	if (noioapicquirk)
		return;
	if ((dev->revision == AMD_813X_REV_B1) ||
	    (dev->revision == AMD_813X_REV_B2))
		return;

	pci_read_config_dword(dev, AMD_813X_MISC, &pci_config_dword);
	pci_config_dword &= ~AMD_813X_NOIOAMODE;
	pci_write_config_dword(dev, AMD_813X_MISC, pci_config_dword);

	dev_info(&dev->dev, "disabled boot interrupts on device [%04x:%04x]\n",
		 dev->vendor, dev->device);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,	PCI_DEVICE_ID_AMD_8131_BRIDGE,	quirk_disable_amd_813x_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD,	PCI_DEVICE_ID_AMD_8131_BRIDGE,	quirk_disable_amd_813x_boot_interrupt);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,	PCI_DEVICE_ID_AMD_8132_BRIDGE,	quirk_disable_amd_813x_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD,	PCI_DEVICE_ID_AMD_8132_BRIDGE,	quirk_disable_amd_813x_boot_interrupt);

#define AMD_8111_PCI_IRQ_ROUTING	0x56

static void quirk_disable_amd_8111_boot_interrupt(struct pci_dev *dev)
{
	u16 pci_config_word;

	if (noioapicquirk)
		return;

	pci_read_config_word(dev, AMD_8111_PCI_IRQ_ROUTING, &pci_config_word);
	if (!pci_config_word) {
		dev_info(&dev->dev, "boot interrupts on device [%04x:%04x] "
			 "already disabled\n", dev->vendor, dev->device);
		return;
	}
	pci_write_config_word(dev, AMD_8111_PCI_IRQ_ROUTING, 0);
	dev_info(&dev->dev, "disabled boot interrupts on device [%04x:%04x]\n",
		 dev->vendor, dev->device);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,   PCI_DEVICE_ID_AMD_8111_SMBUS,	quirk_disable_amd_8111_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD,   PCI_DEVICE_ID_AMD_8111_SMBUS,	quirk_disable_amd_8111_boot_interrupt);
#endif /* CONFIG_X86_IO_APIC */

/*
 * Toshiba TC86C001 IDE controller reports the standard 8-byte BAR0 size
 * but the PIO transfers won't work if BAR0 falls at the odd 8 bytes.
 * Re-allocate the region if needed...
 */
static void quirk_tc86c001_ide(struct pci_dev *dev)
{
	struct resource *r = &dev->resource[0];

	if (r->start & 0x8) {
		r->start = 0;
		r->end = 0xf;
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA_2,
			 PCI_DEVICE_ID_TOSHIBA_TC86C001_IDE,
			 quirk_tc86c001_ide);

/*
 * PLX PCI 9050 PCI Target bridge controller has an errata that prevents the
 * local configuration registers accessible via BAR0 (memory) or BAR1 (i/o)
 * being read correctly if bit 7 of the base address is set.
 * The BAR0 or BAR1 region may be disabled (size 0) or enabled (size 128).
 * Re-allocate the regions to a 256-byte boundary if necessary.
 */
static void quirk_plx_pci9050(struct pci_dev *dev)
{
	unsigned int bar;

	/* Fixed in revision 2 (PCI 9052). */
	if (dev->revision >= 2)
		return;
	for (bar = 0; bar <= 1; bar++)
		if (pci_resource_len(dev, bar) == 0x80 &&
		    (pci_resource_start(dev, bar) & 0x80)) {
			struct resource *r = &dev->resource[bar];
			dev_info(&dev->dev,
				 "Re-allocating PLX PCI 9050 BAR %u to length 256 to avoid bit 7 bug\n",
				 bar);
			r->start = 0;
			r->end = 0xff;
		}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
			 quirk_plx_pci9050);
/*
 * The following Meilhaus (vendor ID 0x1402) device IDs (amongst others)
 * may be using the PLX PCI 9050: 0x0630, 0x0940, 0x0950, 0x0960, 0x100b,
 * 0x1400, 0x140a, 0x140b, 0x14e0, 0x14ea, 0x14eb, 0x1604, 0x1608, 0x160c,
 * 0x168f, 0x2000, 0x2600, 0x3000, 0x810a, 0x810b.
 *
 * Currently, device IDs 0x2000 and 0x2600 are used by the Comedi "me_daq"
 * driver.
 */
DECLARE_PCI_FIXUP_HEADER(0x1402, 0x2000, quirk_plx_pci9050);
DECLARE_PCI_FIXUP_HEADER(0x1402, 0x2600, quirk_plx_pci9050);

static void quirk_netmos(struct pci_dev *dev)
{
	unsigned int num_parallel = (dev->subsystem_device & 0xf0) >> 4;
	unsigned int num_serial = dev->subsystem_device & 0xf;

	/*
	 * These Netmos parts are multiport serial devices with optional
	 * parallel ports.  Even when parallel ports are present, they
	 * are identified as class SERIAL, which means the serial driver
	 * will claim them.  To prevent this, mark them as class OTHER.
	 * These combo devices should be claimed by parport_serial.
	 *
	 * The subdevice ID is of the form 0x00PS, where <P> is the number
	 * of parallel ports and <S> is the number of serial ports.
	 */
	switch (dev->device) {
	case PCI_DEVICE_ID_NETMOS_9835:
		/* Well, this rule doesn't hold for the following 9835 device */
		if (dev->subsystem_vendor == PCI_VENDOR_ID_IBM &&
				dev->subsystem_device == 0x0299)
			return;
	case PCI_DEVICE_ID_NETMOS_9735:
	case PCI_DEVICE_ID_NETMOS_9745:
	case PCI_DEVICE_ID_NETMOS_9845:
	case PCI_DEVICE_ID_NETMOS_9855:
		if (num_parallel) {
			dev_info(&dev->dev, "Netmos %04x (%u parallel, "
				"%u serial); changing class SERIAL to OTHER "
				"(use parport_serial)\n",
				dev->device, num_parallel, num_serial);
			dev->class = (PCI_CLASS_COMMUNICATION_OTHER << 8) |
			    (dev->class & 0xff);
		}
	}
}
DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_NETMOS, PCI_ANY_ID,
			 PCI_CLASS_COMMUNICATION_SERIAL, 8, quirk_netmos);

static void quirk_e100_interrupt(struct pci_dev *dev)
{
	u16 command, pmcsr;
	u8 __iomem *csr;
	u8 cmd_hi;

	switch (dev->device) {
	/* PCI IDs taken from drivers/net/e100.c */
	case 0x1029:
	case 0x1030 ... 0x1034:
	case 0x1038 ... 0x103E:
	case 0x1050 ... 0x1057:
	case 0x1059:
	case 0x1064 ... 0x106B:
	case 0x1091 ... 0x1095:
	case 0x1209:
	case 0x1229:
	case 0x2449:
	case 0x2459:
	case 0x245D:
	case 0x27DC:
		break;
	default:
		return;
	}

	/*
	 * Some firmware hands off the e100 with interrupts enabled,
	 * which can cause a flood of interrupts if packets are
	 * received before the driver attaches to the device.  So
	 * disable all e100 interrupts here.  The driver will
	 * re-enable them when it's ready.
	 */
	pci_read_config_word(dev, PCI_COMMAND, &command);

	if (!(command & PCI_COMMAND_MEMORY) || !pci_resource_start(dev, 0))
		return;

	/*
	 * Check that the device is in the D0 power state. If it's not,
	 * there is no point to look any further.
	 */
	if (dev->pm_cap) {
		pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
		if ((pmcsr & PCI_PM_CTRL_STATE_MASK) != PCI_D0)
			return;
	}

	/* Convert from PCI bus to resource space.  */
	csr = ioremap(pci_resource_start(dev, 0), 8);
	if (!csr) {
		dev_warn(&dev->dev, "Can't map e100 registers\n");
		return;
	}

	cmd_hi = readb(csr + 3);
	if (cmd_hi == 0) {
		dev_warn(&dev->dev, "Firmware left e100 interrupts enabled; "
			"disabling\n");
		writeb(1, csr + 3);
	}

	iounmap(csr);
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
			PCI_CLASS_NETWORK_ETHERNET, 8, quirk_e100_interrupt);

/*
 * The 82575 and 82598 may experience data corruption issues when transitioning
 * out of L0S.  To prevent this we need to disable L0S on the pci-e link
 */
static void quirk_disable_aspm_l0s(struct pci_dev *dev)
{
	dev_info(&dev->dev, "Disabling L0s\n");
	pci_disable_link_state(dev, PCIE_LINK_STATE_L0S);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10a7, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10a9, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10b6, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10c6, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10c7, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10c8, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10d6, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10db, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10dd, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10e1, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10ec, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10f1, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x10f4, quirk_disable_aspm_l0s);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1508, quirk_disable_aspm_l0s);

static void fixup_rev1_53c810(struct pci_dev *dev)
{
	/* rev 1 ncr53c810 chips don't set the class at all which means
	 * they don't get their resources remapped. Fix that here.
	 */

	if (dev->class == PCI_CLASS_NOT_DEFINED) {
		dev_info(&dev->dev, "NCR 53c810 rev 1 detected; setting PCI class\n");
		dev->class = PCI_CLASS_STORAGE_SCSI;
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, fixup_rev1_53c810);

/* Enable 1k I/O space granularity on the Intel P64H2 */
static void quirk_p64h2_1k_io(struct pci_dev *dev)
{
	u16 en1k;

	pci_read_config_word(dev, 0x40, &en1k);

	if (en1k & 0x200) {
		dev_info(&dev->dev, "Enable I/O Space to 1KB granularity\n");
		dev->io_window_1k = 1;
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	0x1460,		quirk_p64h2_1k_io);

/* Under some circumstances, AER is not linked with extended capabilities.
 * Force it to be linked by setting the corresponding control bit in the
 * config space.
 */
static void quirk_nvidia_ck804_pcie_aer_ext_cap(struct pci_dev *dev)
{
	uint8_t b;
	if (pci_read_config_byte(dev, 0xf41, &b) == 0) {
		if (!(b & 0x20)) {
			pci_write_config_byte(dev, 0xf41, b | 0x20);
			dev_info(&dev->dev,
			       "Linking AER extended capability\n");
		}
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA,  PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
			quirk_nvidia_ck804_pcie_aer_ext_cap);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA,  PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
			quirk_nvidia_ck804_pcie_aer_ext_cap);

static void quirk_via_cx700_pci_parking_caching(struct pci_dev *dev)
{
	/*
	 * Disable PCI Bus Parking and PCI Master read caching on CX700
	 * which causes unspecified timing errors with a VT6212L on the PCI
	 * bus leading to USB2.0 packet loss.
	 *
	 * This quirk is only enabled if a second (on the external PCI bus)
	 * VT6212L is found -- the CX700 core itself also contains a USB
	 * host controller with the same PCI ID as the VT6212L.
	 */

	/* Count VT6212L instances */
	struct pci_dev *p = pci_get_device(PCI_VENDOR_ID_VIA,
		PCI_DEVICE_ID_VIA_8235_USB_2, NULL);
	uint8_t b;

	/* p should contain the first (internal) VT6212L -- see if we have
	   an external one by searching again */
	p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235_USB_2, p);
	if (!p)
		return;
	pci_dev_put(p);

	if (pci_read_config_byte(dev, 0x76, &b) == 0) {
		if (b & 0x40) {
			/* Turn off PCI Bus Parking */
			pci_write_config_byte(dev, 0x76, b ^ 0x40);

			dev_info(&dev->dev,
				"Disabling VIA CX700 PCI parking\n");
		}
	}

	if (pci_read_config_byte(dev, 0x72, &b) == 0) {
		if (b != 0) {
			/* Turn off PCI Master read caching */
			pci_write_config_byte(dev, 0x72, 0x0);

			/* Set PCI Master Bus time-out to "1x16 PCLK" */
			pci_write_config_byte(dev, 0x75, 0x1);

			/* Disable "Read FIFO Timer" */
			pci_write_config_byte(dev, 0x77, 0x0);

			dev_info(&dev->dev,
				"Disabling VIA CX700 PCI caching\n");
		}
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching);

/*
 * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the
 * VPD end tag will hang the device.  This problem was initially
 * observed when a vpd entry was created in sysfs
 * ('/sys/bus/pci/devices/<id>/vpd').   A read to this sysfs entry
 * will dump 32k of data.  Reading a full 32k will cause an access
 * beyond the VPD end tag causing the device to hang.  Once the device
 * is hung, the bnx2 driver will not be able to reset the device.
 * We believe that it is legal to read beyond the end tag and
 * therefore the solution is to limit the read/write length.
 */
static void quirk_brcm_570x_limit_vpd(struct pci_dev *dev)
{
	/*
	 * Only disable the VPD capability for 5706, 5706S, 5708,
	 * 5708S and 5709 rev. A
	 */
	if ((dev->device == PCI_DEVICE_ID_NX2_5706) ||
	    (dev->device == PCI_DEVICE_ID_NX2_5706S) ||
	    (dev->device == PCI_DEVICE_ID_NX2_5708) ||
	    (dev->device == PCI_DEVICE_ID_NX2_5708S) ||
	    ((dev->device == PCI_DEVICE_ID_NX2_5709) &&
	     (dev->revision & 0xf0) == 0x0)) {
		if (dev->vpd)
			dev->vpd->len = 0x80;
	}
}

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_NX2_5706,
			quirk_brcm_570x_limit_vpd);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_NX2_5706S,
			quirk_brcm_570x_limit_vpd);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_NX2_5708,
			quirk_brcm_570x_limit_vpd);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_NX2_5708S,
			quirk_brcm_570x_limit_vpd);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_NX2_5709,
			quirk_brcm_570x_limit_vpd);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_NX2_5709S,
			quirk_brcm_570x_limit_vpd);

static void quirk_brcm_5719_limit_mrrs(struct pci_dev *dev)
{
	u32 rev;

	pci_read_config_dword(dev, 0xf4, &rev);

	/* Only CAP the MRRS if the device is a 5719 A0 */
	if (rev == 0x05719000) {
		int readrq = pcie_get_readrq(dev);
		if (readrq > 2048)
			pcie_set_readrq(dev, 2048);
	}
}

DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_BROADCOM,
			 PCI_DEVICE_ID_TIGON3_5719,
			 quirk_brcm_5719_limit_mrrs);

/* Originally in EDAC sources for i82875P:
 * Intel tells BIOS developers to hide device 6 which
 * configures the overflow device access containing
 * the DRBs - this is where we expose device 6.
 * http://www.x86-secret.com/articles/tweak/pat/patsecrets-2.htm
 */
static void quirk_unhide_mch_dev6(struct pci_dev *dev)
{
	u8 reg;

	if (pci_read_config_byte(dev, 0xF4, &reg) == 0 && !(reg & 0x02)) {
		dev_info(&dev->dev, "Enabling MCH 'Overflow' Device\n");
		pci_write_config_byte(dev, 0xF4, reg | 0x02);
	}
}

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82865_HB,
			quirk_unhide_mch_dev6);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82875_HB,
			quirk_unhide_mch_dev6);

#ifdef CONFIG_TILEPRO
/*
 * The Tilera TILEmpower tilepro platform needs to set the link speed
 * to 2.5GT(Giga-Transfers)/s (Gen 1). The default link speed
 * setting is 5GT/s (Gen 2). 0x98 is the Link Control2 PCIe
 * capability register of the PEX8624 PCIe switch. The switch
 * supports link speed auto negotiation, but falsely sets
 * the link speed to 5GT/s.
 */
static void quirk_tile_plx_gen1(struct pci_dev *dev)
{
	if (tile_plx_gen1) {
		pci_write_config_dword(dev, 0x98, 0x1);
		mdelay(50);
	}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8624, quirk_tile_plx_gen1);
#endif /* CONFIG_TILEPRO */

#ifdef CONFIG_PCI_MSI
/* Some chipsets do not support MSI. We cannot easily rely on setting
 * PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually
 * some other buses controlled by the chipset even if Linux is not
 * aware of it.  Instead of setting the flag on all buses in the
 * machine, simply disable MSI globally.
 */
static void quirk_disable_all_msi(struct pci_dev *dev)
{
	pci_no_msi();
	dev_warn(&dev->dev, "MSI quirk detected; MSI disabled\n");
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_GCNB_LE, quirk_disable_all_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS400_200, quirk_disable_all_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS480, quirk_disable_all_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3336, quirk_disable_all_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3351, quirk_disable_all_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3364, quirk_disable_all_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8380_0, quirk_disable_all_msi);

/* Disable MSI on chipsets that are known to not support it */
static void quirk_disable_msi(struct pci_dev *dev)
{
	if (dev->subordinate) {
		dev_warn(&dev->dev, "MSI quirk detected; "
			"subordinate MSI disabled\n");
		dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x5a3f, quirk_disable_msi);

/*
 * The APC bridge device in AMD 780 family northbridges has some random
 * OEM subsystem ID in its vendor ID register (erratum 18), so instead
 * we use the possible vendor/device IDs of the host bridge for the
 * declared quirk, and search for the APC bridge by slot number.
 */
static void quirk_amd_780_apc_msi(struct pci_dev *host_bridge)
{
	struct pci_dev *apc_bridge;

	apc_bridge = pci_get_slot(host_bridge->bus, PCI_DEVFN(1, 0));
	if (apc_bridge) {
		if (apc_bridge->device == 0x9602)
			quirk_disable_msi(apc_bridge);
		pci_dev_put(apc_bridge);
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9600, quirk_amd_780_apc_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9601, quirk_amd_780_apc_msi);

/* Go through the list of Hypertransport capabilities and
 * return 1 if a HT MSI capability is found and enabled */
static int msi_ht_cap_enabled(struct pci_dev *dev)
{
	int pos, ttl = 48;

	pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
	while (pos && ttl--) {
		u8 flags;

		if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
					 &flags) == 0)
		{
			dev_info(&dev->dev, "Found %s HT MSI Mapping\n",
				flags & HT_MSI_FLAGS_ENABLE ?
				"enabled" : "disabled");
			return (flags & HT_MSI_FLAGS_ENABLE) != 0;
		}

		pos = pci_find_next_ht_capability(dev, pos,
						  HT_CAPTYPE_MSI_MAPPING);
	}
	return 0;
}

/* Check the hypertransport MSI mapping to know whether MSI is enabled or not */
static void quirk_msi_ht_cap(struct pci_dev *dev)
{
	if (dev->subordinate && !msi_ht_cap_enabled(dev)) {
		dev_warn(&dev->dev, "MSI quirk detected; "
			"subordinate MSI disabled\n");
		dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE,
			quirk_msi_ht_cap);

/* The nVidia CK804 chipset may have 2 HT MSI mappings.
 * MSI are supported if the MSI capability set in any of these mappings.
 */
static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev)
{
	struct pci_dev *pdev;

	if (!dev->subordinate)
		return;

	/* check HT MSI cap on this chipset and the root one.
	 * a single one having MSI is enough to be sure that MSI are supported.
	 */
	pdev = pci_get_slot(dev->bus, 0);
	if (!pdev)
		return;
	if (!msi_ht_cap_enabled(dev) && !msi_ht_cap_enabled(pdev)) {
		dev_warn(&dev->dev, "MSI quirk detected; "
			"subordinate MSI disabled\n");
		dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
	}
	pci_dev_put(pdev);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
			quirk_nvidia_ck804_msi_ht_cap);

/* Force enable MSI mapping capability on HT bridges */
static void ht_enable_msi_mapping(struct pci_dev *dev)
{
	int pos, ttl = 48;

	pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
	while (pos && ttl--) {
		u8 flags;

		if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
					 &flags) == 0) {
			dev_info(&dev->dev, "Enabling HT MSI Mapping\n");

			pci_write_config_byte(dev, pos + HT_MSI_FLAGS,
					      flags | HT_MSI_FLAGS_ENABLE);
		}
		pos = pci_find_next_ht_capability(dev, pos,
						  HT_CAPTYPE_MSI_MAPPING);
	}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS,
			 PCI_DEVICE_ID_SERVERWORKS_HT1000_PXB,
			 ht_enable_msi_mapping);

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8132_BRIDGE,
			 ht_enable_msi_mapping);

/* The P5N32-SLI motherboards from Asus have a problem with msi
 * for the MCP55 NIC. It is not yet determined whether the msi problem
 * also affects other devices. As for now, turn off msi for this device.
 */
static void nvenet_msi_disable(struct pci_dev *dev)
{
	const char *board_name = dmi_get_system_info(DMI_BOARD_NAME);

	if (board_name &&
	    (strstr(board_name, "P5N32-SLI PREMIUM") ||
	     strstr(board_name, "P5N32-E SLI"))) {
		dev_info(&dev->dev,
			 "Disabling msi for MCP55 NIC on P5N32-SLI\n");
		dev->no_msi = 1;
	}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
			PCI_DEVICE_ID_NVIDIA_NVENET_15,
			nvenet_msi_disable);

/*
 * Some versions of the MCP55 bridge from Nvidia have a legacy IRQ routing
 * config register.  This register controls the routing of legacy
 * interrupts from devices that route through the MCP55.  If this register
 * is misprogrammed, interrupts are only sent to the BSP, unlike
 * conventional systems where the IRQ is broadcast to all online CPUs.  Not
 * having this register set properly prevents kdump from booting up
 * properly, so let's make sure that we have it set correctly.
 * Note that this is an undocumented register.
 */
static void nvbridge_check_legacy_irq_routing(struct pci_dev *dev)
{
	u32 cfg;

	if (!pci_find_capability(dev, PCI_CAP_ID_HT))
		return;

	pci_read_config_dword(dev, 0x74, &cfg);

	if (cfg & ((1 << 2) | (1 << 15))) {
		printk(KERN_INFO "Rewriting irq routing register on MCP55\n");
		cfg &= ~((1 << 2) | (1 << 15));
		pci_write_config_dword(dev, 0x74, cfg);
	}
}

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
			PCI_DEVICE_ID_NVIDIA_MCP55_BRIDGE_V0,
			nvbridge_check_legacy_irq_routing);

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
			PCI_DEVICE_ID_NVIDIA_MCP55_BRIDGE_V4,
			nvbridge_check_legacy_irq_routing);

static int ht_check_msi_mapping(struct pci_dev *dev)
{
	int pos, ttl = 48;
	int found = 0;

	/* check if there is HT MSI cap or enabled on this device */
	pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
	while (pos && ttl--) {
		u8 flags;

		if (found < 1)
			found = 1;
		if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
					 &flags) == 0) {
			if (flags & HT_MSI_FLAGS_ENABLE) {
				if (found < 2) {
					found = 2;
					break;
				}
			}
		}
		pos = pci_find_next_ht_capability(dev, pos,
						  HT_CAPTYPE_MSI_MAPPING);
	}

	return found;
}

static int host_bridge_with_leaf(struct pci_dev *host_bridge)
{
	struct pci_dev *dev;
	int pos;
	int i, dev_no;
	int found = 0;

	dev_no = host_bridge->devfn >> 3;
	for (i = dev_no + 1; i < 0x20; i++) {
		dev = pci_get_slot(host_bridge->bus, PCI_DEVFN(i, 0));
		if (!dev)
			continue;

		/* found next host bridge ?*/
		pos = pci_find_ht_capability(dev, HT_CAPTYPE_SLAVE);
		if (pos != 0) {
			pci_dev_put(dev);
			break;
		}

		if (ht_check_msi_mapping(dev)) {
			found = 1;
			pci_dev_put(dev);
			break;
		}
		pci_dev_put(dev);
	}

	return found;
}

#define PCI_HT_CAP_SLAVE_CTRL0     4    /* link control */
#define PCI_HT_CAP_SLAVE_CTRL1     8    /* link control to */

static int is_end_of_ht_chain(struct pci_dev *dev)
{
	int pos, ctrl_off;
	int end = 0;
	u16 flags, ctrl;

	pos = pci_find_ht_capability(dev, HT_CAPTYPE_SLAVE);

	if (!pos)
		goto out;

	pci_read_config_word(dev, pos + PCI_CAP_FLAGS, &flags);

	ctrl_off = ((flags >> 10) & 1) ?
			PCI_HT_CAP_SLAVE_CTRL0 : PCI_HT_CAP_SLAVE_CTRL1;
	pci_read_config_word(dev, pos + ctrl_off, &ctrl);

	if (ctrl & (1 << 6))
		end = 1;

out:
	return end;
}

static void nv_ht_enable_msi_mapping(struct pci_dev *dev)
{
	struct pci_dev *host_bridge;
	int pos;
	int i, dev_no;
	int found = 0;

	dev_no = dev->devfn >> 3;
	for (i = dev_no; i >= 0; i--) {
		host_bridge = pci_get_slot(dev->bus, PCI_DEVFN(i, 0));
		if (!host_bridge)
			continue;

		pos = pci_find_ht_capability(host_bridge, HT_CAPTYPE_SLAVE);
		if (pos != 0) {
			found = 1;
			break;
		}
		pci_dev_put(host_bridge);
	}

	if (!found)
		return;

	/* don't enable end_device/host_bridge with leaf directly here */
	if (host_bridge == dev && is_end_of_ht_chain(host_bridge) &&
	    host_bridge_with_leaf(host_bridge))
		goto out;

	/* root did that ! */
	if (msi_ht_cap_enabled(host_bridge))
		goto out;

	ht_enable_msi_mapping(dev);

out:
	pci_dev_put(host_bridge);
}

static void ht_disable_msi_mapping(struct pci_dev *dev)
{
	int pos, ttl = 48;

	pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
	while (pos && ttl--) {
		u8 flags;

		if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
					 &flags) == 0) {
			dev_info(&dev->dev, "Disabling HT MSI Mapping\n");

			pci_write_config_byte(dev, pos + HT_MSI_FLAGS,
					      flags & ~HT_MSI_FLAGS_ENABLE);
		}
		pos = pci_find_next_ht_capability(dev, pos,
						  HT_CAPTYPE_MSI_MAPPING);
	}
}

static void __nv_msi_ht_cap_quirk(struct pci_dev *dev, int all)
{
	struct pci_dev *host_bridge;
	int pos;
	int found;

	if (!pci_msi_enabled())
		return;

	/* check if there is HT MSI cap or enabled on this device */
	found = ht_check_msi_mapping(dev);

	/* no HT MSI CAP */
	if (found == 0)
		return;

	/*
	 * HT MSI mapping should be disabled on devices that are below
	 * a non-Hypertransport host bridge. Locate the host bridge...
	 */
	host_bridge = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
	if (host_bridge == NULL) {
		dev_warn(&dev->dev,
			 "nv_msi_ht_cap_quirk didn't locate host bridge\n");
		return;
	}

	pos = pci_find_ht_capability(host_bridge, HT_CAPTYPE_SLAVE);
	if (pos != 0) {
		/* Host bridge is to HT */
		if (found == 1) {
			/* it is not enabled, try to enable it */
			if (all)
				ht_enable_msi_mapping(dev);
			else
				nv_ht_enable_msi_mapping(dev);
		}
		goto out;
	}

	/* HT MSI is not enabled */
	if (found == 1)
		goto out;

	/* Host bridge is not to HT, disable HT MSI mapping on this device */
	ht_disable_msi_mapping(dev);

out:
	pci_dev_put(host_bridge);
}

static void nv_msi_ht_cap_quirk_all(struct pci_dev *dev)
{
	return __nv_msi_ht_cap_quirk(dev, 1);
}

static void nv_msi_ht_cap_quirk_leaf(struct pci_dev *dev)
{
	return __nv_msi_ht_cap_quirk(dev, 0);
}

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);

static void quirk_msi_intx_disable_bug(struct pci_dev *dev)
{
	dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
}
static void quirk_msi_intx_disable_ati_bug(struct pci_dev *dev)
{
	struct pci_dev *p;

	/* SB700 MSI issue will be fixed at HW level from revision A21,
	 * we need check PCI REVISION ID of SMBus controller to get SB700
	 * revision.
	 */
	p = pci_get_device(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
			   NULL);
	if (!p)
		return;

	if ((p->revision < 0x3B) && (p->revision >= 0x30))
		dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
	pci_dev_put(p);
}
static void quirk_msi_intx_disable_qca_bug(struct pci_dev *dev)
{
	/* AR816X/AR817X/E210X MSI is fixed at HW level from revision 0x18 */
	if (dev->revision < 0x18) {
		dev_info(&dev->dev, "set MSI_INTX_DISABLE_BUG flag\n");
		dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_TIGON3_5780,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_TIGON3_5780S,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_TIGON3_5714,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_TIGON3_5714S,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_TIGON3_5715,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM,
			PCI_DEVICE_ID_TIGON3_5715S,
			quirk_msi_intx_disable_bug);

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4390,
			quirk_msi_intx_disable_ati_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4391,
			quirk_msi_intx_disable_ati_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4392,
			quirk_msi_intx_disable_ati_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4393,
			quirk_msi_intx_disable_ati_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4394,
			quirk_msi_intx_disable_ati_bug);

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4373,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4374,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4375,
			quirk_msi_intx_disable_bug);

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1062,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1063,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x2060,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x2062,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1073,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1083,
			quirk_msi_intx_disable_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1090,
			quirk_msi_intx_disable_qca_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x1091,
			quirk_msi_intx_disable_qca_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x10a0,
			quirk_msi_intx_disable_qca_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0x10a1,
			quirk_msi_intx_disable_qca_bug);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0xe091,
			quirk_msi_intx_disable_qca_bug);
#endif /* CONFIG_PCI_MSI */

/* Allow manual resource allocation for PCI hotplug bridges
 * via pci=hpmemsize=nnM and pci=hpiosize=nnM parameters. For
 * some PCI-PCI hotplug bridges, like PLX 6254 (former HINT HB6),
 * kernel fails to allocate resources when hotplug device is
 * inserted and PCI bus is rescanned.
 */
static void quirk_hotplug_bridge(struct pci_dev *dev)
{
	dev->is_hotplug_bridge = 1;
}

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HINT, 0x0020, quirk_hotplug_bridge);

/*
 * This is a quirk for the Ricoh MMC controller found as a part of
 * some mulifunction chips.

 * This is very similar and based on the ricoh_mmc driver written by
 * Philip Langdale. Thank you for these magic sequences.
 *
 * These chips implement the four main memory card controllers (SD, MMC, MS, xD)
 * and one or both of cardbus or firewire.
 *
 * It happens that they implement SD and MMC
 * support as separate controllers (and PCI functions). The linux SDHCI
 * driver supports MMC cards but the chip detects MMC cards in hardware
 * and directs them to the MMC controller - so the SDHCI driver never sees
 * them.
 *
 * To get around this, we must disable the useless MMC controller.
 * At that point, the SDHCI controller will start seeing them
 * It seems to be the case that the relevant PCI registers to deactivate the
 * MMC controller live on PCI function 0, which might be the cardbus controller
 * or the firewire controller, depending on the particular chip in question
 *
 * This has to be done early, because as soon as we disable the MMC controller
 * other pci functions shift up one level, e.g. function #2 becomes function
 * #1, and this will confuse the pci core.
 */

#ifdef CONFIG_MMC_RICOH_MMC
static void ricoh_mmc_fixup_rl5c476(struct pci_dev *dev)
{
	/* disable via cardbus interface */
	u8 write_enable;
	u8 write_target;
	u8 disable;

	/* disable must be done via function #0 */
	if (PCI_FUNC(dev->devfn))
		return;

	pci_read_config_byte(dev, 0xB7, &disable);
	if (disable & 0x02)
		return;

	pci_read_config_byte(dev, 0x8E, &write_enable);
	pci_write_config_byte(dev, 0x8E, 0xAA);
	pci_read_config_byte(dev, 0x8D, &write_target);
	pci_write_config_byte(dev, 0x8D, 0xB7);
	pci_write_config_byte(dev, 0xB7, disable | 0x02);
	pci_write_config_byte(dev, 0x8E, write_enable);
	pci_write_config_byte(dev, 0x8D, write_target);

	dev_notice(&dev->dev, "proprietary Ricoh MMC controller disabled (via cardbus function)\n");
	dev_notice(&dev->dev, "MMC cards are now supported by standard SDHCI controller\n");
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476, ricoh_mmc_fixup_rl5c476);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476, ricoh_mmc_fixup_rl5c476);

static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev)
{
	/* disable via firewire interface */
	u8 write_enable;
	u8 disable;

	/* disable must be done via function #0 */
	if (PCI_FUNC(dev->devfn))
		return;
	/*
	 * RICOH 0xe822 and 0xe823 SD/MMC card readers fail to recognize
	 * certain types of SD/MMC cards. Lowering the SD base
	 * clock frequency from 200Mhz to 50Mhz fixes this issue.
	 *
	 * 0x150 - SD2.0 mode enable for changing base clock
	 *	   frequency to 50Mhz
	 * 0xe1  - Base clock frequency
	 * 0x32  - 50Mhz new clock frequency
	 * 0xf9  - Key register for 0x150
	 * 0xfc  - key register for 0xe1
	 */
	if (dev->device == PCI_DEVICE_ID_RICOH_R5CE822 ||
	    dev->device == PCI_DEVICE_ID_RICOH_R5CE823) {
		pci_write_config_byte(dev, 0xf9, 0xfc);
		pci_write_config_byte(dev, 0x150, 0x10);
		pci_write_config_byte(dev, 0xf9, 0x00);
		pci_write_config_byte(dev, 0xfc, 0x01);
		pci_write_config_byte(dev, 0xe1, 0x32);
		pci_write_config_byte(dev, 0xfc, 0x00);

		dev_notice(&dev->dev, "MMC controller base frequency changed to 50Mhz.\n");
	}

	pci_read_config_byte(dev, 0xCB, &disable);

	if (disable & 0x02)
		return;

	pci_read_config_byte(dev, 0xCA, &write_enable);
	pci_write_config_byte(dev, 0xCA, 0x57);
	pci_write_config_byte(dev, 0xCB, disable | 0x02);
	pci_write_config_byte(dev, 0xCA, write_enable);

	dev_notice(&dev->dev, "proprietary Ricoh MMC controller disabled (via firewire function)\n");
	dev_notice(&dev->dev, "MMC cards are now supported by standard SDHCI controller\n");

}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE822, ricoh_mmc_fixup_r5c832);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE822, ricoh_mmc_fixup_r5c832);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE823, ricoh_mmc_fixup_r5c832);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE823, ricoh_mmc_fixup_r5c832);
#endif /*CONFIG_MMC_RICOH_MMC*/

#ifdef CONFIG_DMAR_TABLE
#define VTUNCERRMSK_REG	0x1ac
#define VTD_MSK_SPEC_ERRORS	(1 << 31)
/*
 * This is a quirk for masking vt-d spec defined errors to platform error
 * handling logic. With out this, platforms using Intel 7500, 5500 chipsets
 * (and the derivative chipsets like X58 etc) seem to generate NMI/SMI (based
 * on the RAS config settings of the platform) when a vt-d fault happens.
 * The resulting SMI caused the system to hang.
 *
 * VT-d spec related errors are already handled by the VT-d OS code, so no
 * need to report the same error through other channels.
 */
static void vtd_mask_spec_errors(struct pci_dev *dev)
{
	u32 word;

	pci_read_config_dword(dev, VTUNCERRMSK_REG, &word);
	pci_write_config_dword(dev, VTUNCERRMSK_REG, word | VTD_MSK_SPEC_ERRORS);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x342e, vtd_mask_spec_errors);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors);
#endif

static void fixup_ti816x_class(struct pci_dev *dev)
{
	/* TI 816x devices do not have class code set when in PCIe boot mode */
	dev_info(&dev->dev, "Setting PCI class for 816x PCIe device\n");
	dev->class = PCI_CLASS_MULTIMEDIA_VIDEO;
}
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_TI, 0xb800,
				 PCI_CLASS_NOT_DEFINED, 0, fixup_ti816x_class);

/* Some PCIe devices do not work reliably with the claimed maximum
 * payload size supported.
 */
static void fixup_mpss_256(struct pci_dev *dev)
{
	dev->pcie_mpss = 1; /* 256 bytes */
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SOLARFLARE,
			 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0, fixup_mpss_256);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SOLARFLARE,
			 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_1, fixup_mpss_256);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SOLARFLARE,
			 PCI_DEVICE_ID_SOLARFLARE_SFC4000B, fixup_mpss_256);

/* Intel 5000 and 5100 Memory controllers have an errata with read completion
 * coalescing (which is enabled by default on some BIOSes) and MPS of 256B.
 * Since there is no way of knowing what the PCIE MPS on each fabric will be
 * until all of the devices are discovered and buses walked, read completion
 * coalescing must be disabled.  Unfortunately, it cannot be re-enabled because
 * it is possible to hotplug a device with MPS of 256B.
 */
static void quirk_intel_mc_errata(struct pci_dev *dev)
{
	int err;
	u16 rcc;

	if (pcie_bus_config == PCIE_BUS_TUNE_OFF)
		return;

	/* Intel errata specifies bits to change but does not say what they are.
	 * Keeping them magical until such time as the registers and values can
	 * be explained.
	 */
	err = pci_read_config_word(dev, 0x48, &rcc);
	if (err) {
		dev_err(&dev->dev, "Error attempting to read the read "
			"completion coalescing register.\n");
		return;
	}

	if (!(rcc & (1 << 10)))
		return;

	rcc &= ~(1 << 10);

	err = pci_write_config_word(dev, 0x48, rcc);
	if (err) {
		dev_err(&dev->dev, "Error attempting to write the read "
			"completion coalescing register.\n");
		return;
	}

	pr_info_once("Read completion coalescing disabled due to hardware "
		     "errata relating to 256B MPS.\n");
}
/* Intel 5000 series memory controllers and ports 2-7 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25c0, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25d0, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25d4, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25d8, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e2, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e3, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e4, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e5, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e6, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25e7, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25f7, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25f8, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25f9, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25fa, quirk_intel_mc_errata);
/* Intel 5100 series memory controllers and ports 2-7 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65c0, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e2, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e3, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e4, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e5, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e6, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65e7, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f7, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f8, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f9, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65fa, quirk_intel_mc_errata);


/*
 * Ivytown NTB BAR sizes are misreported by the hardware due to an erratum.  To
 * work around this, query the size it should be configured to by the device and
 * modify the resource end to correspond to this new size.
 */
static void quirk_intel_ntb(struct pci_dev *dev)
{
	int rc;
	u8 val;

	rc = pci_read_config_byte(dev, 0x00D0, &val);
	if (rc)
		return;

	dev->resource[2].end = dev->resource[2].start + ((u64) 1 << val) - 1;

	rc = pci_read_config_byte(dev, 0x00D1, &val);
	if (rc)
		return;

	dev->resource[4].end = dev->resource[4].start + ((u64) 1 << val) - 1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0e08, quirk_intel_ntb);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0e0d, quirk_intel_ntb);

static ktime_t fixup_debug_start(struct pci_dev *dev,
				 void (*fn)(struct pci_dev *dev))
{
	ktime_t calltime = ktime_set(0, 0);

	dev_dbg(&dev->dev, "calling %pF\n", fn);
	if (initcall_debug) {
		pr_debug("calling  %pF @ %i for %s\n",
			 fn, task_pid_nr(current), dev_name(&dev->dev));
		calltime = ktime_get();
	}

	return calltime;
}

static void fixup_debug_report(struct pci_dev *dev, ktime_t calltime,
			       void (*fn)(struct pci_dev *dev))
{
	ktime_t delta, rettime;
	unsigned long long duration;

	if (initcall_debug) {
		rettime = ktime_get();
		delta = ktime_sub(rettime, calltime);
		duration = (unsigned long long) ktime_to_ns(delta) >> 10;
		pr_debug("pci fixup %pF returned after %lld usecs for %s\n",
			 fn, duration, dev_name(&dev->dev));
	}
}

/*
 * Some BIOS implementations leave the Intel GPU interrupts enabled,
 * even though no one is handling them (f.e. i915 driver is never loaded).
 * Additionally the interrupt destination is not set up properly
 * and the interrupt ends up -somewhere-.
 *
 * These spurious interrupts are "sticky" and the kernel disables
 * the (shared) interrupt line after 100.000+ generated interrupts.
 *
 * Fix it by disabling the still enabled interrupts.
 * This resolves crashes often seen on monitor unplug.
 */
#define I915_DEIER_REG 0x4400c
static void disable_igfx_irq(struct pci_dev *dev)
{
	void __iomem *regs = pci_iomap(dev, 0, 0);
	if (regs == NULL) {
		dev_warn(&dev->dev, "igfx quirk: Can't iomap PCI device\n");
		return;
	}

	/* Check if any interrupt line is still enabled */
	if (readl(regs + I915_DEIER_REG) != 0) {
		dev_warn(&dev->dev, "BIOS left Intel GPU interrupts enabled; "
			"disabling\n");

		writel(0, regs + I915_DEIER_REG);
	}

	pci_iounmap(dev, regs);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);

/*
 * PCI devices which are on Intel chips can skip the 10ms delay
 * before entering D3 mode.
 */
static void quirk_remove_d3_delay(struct pci_dev *dev)
{
	dev->d3_delay = 0;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0c00, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0412, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0c0c, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c31, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c3a, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c3d, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c2d, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c20, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c18, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c1c, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c26, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c4e, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c02, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c22, quirk_remove_d3_delay);

/*
 * Some devices may pass our check in pci_intx_mask_supported if
 * PCI_COMMAND_INTX_DISABLE works though they actually do not properly
 * support this feature.
 */
static void quirk_broken_intx_masking(struct pci_dev *dev)
{
	dev->broken_intx_masking = 1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CHELSIO, 0x0030,
			 quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_HEADER(0x1814, 0x0601, /* Ralink RT2800 802.11n PCI */
			 quirk_broken_intx_masking);

static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
			  struct pci_fixup *end)
{
	ktime_t calltime;

	for (; f < end; f++)
		if ((f->class == (u32) (dev->class >> f->class_shift) ||
		     f->class == (u32) PCI_ANY_ID) &&
		    (f->vendor == dev->vendor ||
		     f->vendor == (u16) PCI_ANY_ID) &&
		    (f->device == dev->device ||
		     f->device == (u16) PCI_ANY_ID)) {
			calltime = fixup_debug_start(dev, f->hook);
			f->hook(dev);
			fixup_debug_report(dev, calltime, f->hook);
		}
}

extern struct pci_fixup __start_pci_fixups_early[];
extern struct pci_fixup __end_pci_fixups_early[];
extern struct pci_fixup __start_pci_fixups_header[];
extern struct pci_fixup __end_pci_fixups_header[];
extern struct pci_fixup __start_pci_fixups_final[];
extern struct pci_fixup __end_pci_fixups_final[];
extern struct pci_fixup __start_pci_fixups_enable[];
extern struct pci_fixup __end_pci_fixups_enable[];
extern struct pci_fixup __start_pci_fixups_resume[];
extern struct pci_fixup __end_pci_fixups_resume[];
extern struct pci_fixup __start_pci_fixups_resume_early[];
extern struct pci_fixup __end_pci_fixups_resume_early[];
extern struct pci_fixup __start_pci_fixups_suspend[];
extern struct pci_fixup __end_pci_fixups_suspend[];

static bool pci_apply_fixup_final_quirks;

void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
{
	struct pci_fixup *start, *end;

	switch(pass) {
	case pci_fixup_early:
		start = __start_pci_fixups_early;
		end = __end_pci_fixups_early;
		break;

	case pci_fixup_header:
		start = __start_pci_fixups_header;
		end = __end_pci_fixups_header;
		break;

	case pci_fixup_final:
		if (!pci_apply_fixup_final_quirks)
			return;
		start = __start_pci_fixups_final;
		end = __end_pci_fixups_final;
		break;

	case pci_fixup_enable:
		start = __start_pci_fixups_enable;
		end = __end_pci_fixups_enable;
		break;

	case pci_fixup_resume:
		start = __start_pci_fixups_resume;
		end = __end_pci_fixups_resume;
		break;

	case pci_fixup_resume_early:
		start = __start_pci_fixups_resume_early;
		end = __end_pci_fixups_resume_early;
		break;

	case pci_fixup_suspend:
		start = __start_pci_fixups_suspend;
		end = __end_pci_fixups_suspend;
		break;

	default:
		/* stupid compiler warning, you would think with an enum... */
		return;
	}
	pci_do_fixups(dev, start, end);
}
EXPORT_SYMBOL(pci_fixup_device);


static int __init pci_apply_final_quirks(void)
{
	struct pci_dev *dev = NULL;
	u8 cls = 0;
	u8 tmp;

	if (pci_cache_line_size)
		printk(KERN_DEBUG "PCI: CLS %u bytes\n",
		       pci_cache_line_size << 2);

	pci_apply_fixup_final_quirks = true;
	for_each_pci_dev(dev) {
		pci_fixup_device(pci_fixup_final, dev);
		/*
		 * If arch hasn't set it explicitly yet, use the CLS
		 * value shared by all PCI devices.  If there's a
		 * mismatch, fall back to the default value.
		 */
		if (!pci_cache_line_size) {
			pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &tmp);
			if (!cls)
				cls = tmp;
			if (!tmp || cls == tmp)
				continue;

			printk(KERN_DEBUG "PCI: CLS mismatch (%u != %u), "
			       "using %u bytes\n", cls << 2, tmp << 2,
			       pci_dfl_cache_line_size << 2);
			pci_cache_line_size = pci_dfl_cache_line_size;
		}
	}

	if (!pci_cache_line_size) {
		printk(KERN_DEBUG "PCI: CLS %u bytes, default %u\n",
		       cls << 2, pci_dfl_cache_line_size << 2);
		pci_cache_line_size = cls ? cls : pci_dfl_cache_line_size;
	}

	return 0;
}

fs_initcall_sync(pci_apply_final_quirks);

/*
 * Followings are device-specific reset methods which can be used to
 * reset a single function if other methods (e.g. FLR, PM D0->D3) are
 * not available.
 */
static int reset_intel_generic_dev(struct pci_dev *dev, int probe)
{
	int pos;

	/* only implement PCI_CLASS_SERIAL_USB at present */
	if (dev->class == PCI_CLASS_SERIAL_USB) {
		pos = pci_find_capability(dev, PCI_CAP_ID_VNDR);
		if (!pos)
			return -ENOTTY;

		if (probe)
			return 0;

		pci_write_config_byte(dev, pos + 0x4, 1);
		msleep(100);

		return 0;
	} else {
		return -ENOTTY;
	}
}

static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe)
{
	/*
	 * http://www.intel.com/content/dam/doc/datasheet/82599-10-gbe-controller-datasheet.pdf
	 *
	 * The 82599 supports FLR on VFs, but FLR support is reported only
	 * in the PF DEVCAP (sec 9.3.10.4), not in the VF DEVCAP (sec 9.5).
	 * Therefore, we can't use pcie_flr(), which checks the VF DEVCAP.
	 */

	if (probe)
		return 0;

	if (!pci_wait_for_pending_transaction(dev))
		dev_err(&dev->dev, "transaction is not cleared; proceeding with reset anyway\n");

	pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);

	msleep(100);

	return 0;
}

#include "../gpu/drm/i915/i915_reg.h"
#define MSG_CTL			0x45010
#define NSDE_PWR_STATE		0xd0100
#define IGD_OPERATION_TIMEOUT	10000     /* set timeout 10 seconds */

static int reset_ivb_igd(struct pci_dev *dev, int probe)
{
	void __iomem *mmio_base;
	unsigned long timeout;
	u32 val;

	if (probe)
		return 0;

	mmio_base = pci_iomap(dev, 0, 0);
	if (!mmio_base)
		return -ENOMEM;

	iowrite32(0x00000002, mmio_base + MSG_CTL);

	/*
	 * Clobbering SOUTH_CHICKEN2 register is fine only if the next
	 * driver loaded sets the right bits. However, this's a reset and
	 * the bits have been set by i915 previously, so we clobber
	 * SOUTH_CHICKEN2 register directly here.
	 */
	iowrite32(0x00000005, mmio_base + SOUTH_CHICKEN2);

	val = ioread32(mmio_base + PCH_PP_CONTROL) & 0xfffffffe;
	iowrite32(val, mmio_base + PCH_PP_CONTROL);

	timeout = jiffies + msecs_to_jiffies(IGD_OPERATION_TIMEOUT);
	do {
		val = ioread32(mmio_base + PCH_PP_STATUS);
		if ((val & 0xb0000000) == 0)
			goto reset_complete;
		msleep(10);
	} while (time_before(jiffies, timeout));
	dev_warn(&dev->dev, "timeout during reset\n");

reset_complete:
	iowrite32(0x00000002, mmio_base + NSDE_PWR_STATE);

	pci_iounmap(dev, mmio_base);
	return 0;
}

/*
 * Device-specific reset method for Chelsio T4-based adapters.
 */
static int reset_chelsio_generic_dev(struct pci_dev *dev, int probe)
{
	u16 old_command;
	u16 msix_flags;

	/*
	 * If this isn't a Chelsio T4-based device, return -ENOTTY indicating
	 * that we have no device-specific reset method.
	 */
	if ((dev->device & 0xf000) != 0x4000)
		return -ENOTTY;

	/*
	 * If this is the "probe" phase, return 0 indicating that we can
	 * reset this device.
	 */
	if (probe)
		return 0;

	/*
	 * T4 can wedge if there are DMAs in flight within the chip and Bus
	 * Master has been disabled.  We need to have it on till the Function
	 * Level Reset completes.  (BUS_MASTER is disabled in
	 * pci_reset_function()).
	 */
	pci_read_config_word(dev, PCI_COMMAND, &old_command);
	pci_write_config_word(dev, PCI_COMMAND,
			      old_command | PCI_COMMAND_MASTER);

	/*
	 * Perform the actual device function reset, saving and restoring
	 * configuration information around the reset.
	 */
	pci_save_state(dev);

	/*
	 * T4 also suffers a Head-Of-Line blocking problem if MSI-X interrupts
	 * are disabled when an MSI-X interrupt message needs to be delivered.
	 * So we briefly re-enable MSI-X interrupts for the duration of the
	 * FLR.  The pci_restore_state() below will restore the original
	 * MSI-X state.
	 */
	pci_read_config_word(dev, dev->msix_cap+PCI_MSIX_FLAGS, &msix_flags);
	if ((msix_flags & PCI_MSIX_FLAGS_ENABLE) == 0)
		pci_write_config_word(dev, dev->msix_cap+PCI_MSIX_FLAGS,
				      msix_flags |
				      PCI_MSIX_FLAGS_ENABLE |
				      PCI_MSIX_FLAGS_MASKALL);

	/*
	 * Start of pcie_flr() code sequence.  This reset code is a copy of
	 * the guts of pcie_flr() because that's not an exported function.
	 */

	if (!pci_wait_for_pending_transaction(dev))
		dev_err(&dev->dev, "transaction is not cleared; proceeding with reset anyway\n");

	pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
	msleep(100);

	/*
	 * End of pcie_flr() code sequence.
	 */

	/*
	 * Restore the configuration information (BAR values, etc.) including
	 * the original PCI Configuration Space Command word, and return
	 * success.
	 */
	pci_restore_state(dev);
	pci_write_config_word(dev, PCI_COMMAND, old_command);
	return 0;
}

#define PCI_DEVICE_ID_INTEL_82599_SFP_VF   0x10ed
#define PCI_DEVICE_ID_INTEL_IVB_M_VGA      0x0156
#define PCI_DEVICE_ID_INTEL_IVB_M2_VGA     0x0166

static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF,
		 reset_intel_82599_sfp_virtfn },
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M_VGA,
		reset_ivb_igd },
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M2_VGA,
		reset_ivb_igd },
	{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
		reset_intel_generic_dev },
	{ PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
		reset_chelsio_generic_dev },
	{ 0 }
};

/*
 * These device-specific reset methods are here rather than in a driver
 * because when a host assigns a device to a guest VM, the host may need
 * to reset the device but probably doesn't have a driver for it.
 */
int pci_dev_specific_reset(struct pci_dev *dev, int probe)
{
	const struct pci_dev_reset_methods *i;

	for (i = pci_dev_reset_methods; i->reset; i++) {
		if ((i->vendor == dev->vendor ||
		     i->vendor == (u16)PCI_ANY_ID) &&
		    (i->device == dev->device ||
		     i->device == (u16)PCI_ANY_ID))
			return i->reset(dev, probe);
	}

	return -ENOTTY;
}

static struct pci_dev *pci_func_0_dma_source(struct pci_dev *dev)
{
	if (!PCI_FUNC(dev->devfn))
		return pci_dev_get(dev);

	return pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
}

static const struct pci_dev_dma_source {
	u16 vendor;
	u16 device;
	struct pci_dev *(*dma_source)(struct pci_dev *dev);
} pci_dev_dma_source[] = {
	/*
	 * https://bugzilla.redhat.com/show_bug.cgi?id=605888
	 *
	 * Some Ricoh devices use the function 0 source ID for DMA on
	 * other functions of a multifunction device.  The DMA devices
	 * is therefore function 0, which will have implications of the
	 * iommu grouping of these devices.
	 */
	{ PCI_VENDOR_ID_RICOH, 0xe822, pci_func_0_dma_source },
	{ PCI_VENDOR_ID_RICOH, 0xe230, pci_func_0_dma_source },
	{ PCI_VENDOR_ID_RICOH, 0xe832, pci_func_0_dma_source },
	{ PCI_VENDOR_ID_RICOH, 0xe476, pci_func_0_dma_source },
	{ 0 }
};

/*
 * IOMMUs with isolation capabilities need to be programmed with the
 * correct source ID of a device.  In most cases, the source ID matches
 * the device doing the DMA, but sometimes hardware is broken and will
 * tag the DMA as being sourced from a different device.  This function
 * allows that translation.  Note that the reference count of the
 * returned device is incremented on all paths.
 */
struct pci_dev *pci_get_dma_source(struct pci_dev *dev)
{
	const struct pci_dev_dma_source *i;

	for (i = pci_dev_dma_source; i->dma_source; i++) {
		if ((i->vendor == dev->vendor ||
		     i->vendor == (u16)PCI_ANY_ID) &&
		    (i->device == dev->device ||
		     i->device == (u16)PCI_ANY_ID))
			return i->dma_source(dev);
	}

	return pci_dev_get(dev);
}

/*
 * AMD has indicated that the devices below do not support peer-to-peer
 * in any system where they are found in the southbridge with an AMD
 * IOMMU in the system.  Multifunction devices that do not support
 * peer-to-peer between functions can claim to support a subset of ACS.
 * Such devices effectively enable request redirect (RR) and completion
 * redirect (CR) since all transactions are redirected to the upstream
 * root complex.
 *
 * http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/94086
 * http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/94102
 * http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/99402
 *
 * 1002:4385 SBx00 SMBus Controller
 * 1002:439c SB7x0/SB8x0/SB9x0 IDE Controller
 * 1002:4383 SBx00 Azalia (Intel HDA)
 * 1002:439d SB7x0/SB8x0/SB9x0 LPC host controller
 * 1002:4384 SBx00 PCI to PCI Bridge
 * 1002:4399 SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
 */
static int pci_quirk_amd_sb_acs(struct pci_dev *dev, u16 acs_flags)
{
#ifdef CONFIG_ACPI
	struct acpi_table_header *header = NULL;
	acpi_status status;

	/* Targeting multifunction devices on the SB (appears on root bus) */
	if (!dev->multifunction || !pci_is_root_bus(dev->bus))
		return -ENODEV;

	/* The IVRS table describes the AMD IOMMU */
	status = acpi_get_table("IVRS", 0, &header);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	/* Filter out flags not applicable to multifunction */
	acs_flags &= (PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_EC | PCI_ACS_DT);

	return acs_flags & ~(PCI_ACS_RR | PCI_ACS_CR) ? 0 : 1;
#else
	return -ENODEV;
#endif
}

static const struct pci_dev_acs_enabled {
	u16 vendor;
	u16 device;
	int (*acs_enabled)(struct pci_dev *dev, u16 acs_flags);
} pci_dev_acs_enabled[] = {
	{ PCI_VENDOR_ID_ATI, 0x4385, pci_quirk_amd_sb_acs },
	{ PCI_VENDOR_ID_ATI, 0x439c, pci_quirk_amd_sb_acs },
	{ PCI_VENDOR_ID_ATI, 0x4383, pci_quirk_amd_sb_acs },
	{ PCI_VENDOR_ID_ATI, 0x439d, pci_quirk_amd_sb_acs },
	{ PCI_VENDOR_ID_ATI, 0x4384, pci_quirk_amd_sb_acs },
	{ PCI_VENDOR_ID_ATI, 0x4399, pci_quirk_amd_sb_acs },
	{ 0 }
};

int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags)
{
	const struct pci_dev_acs_enabled *i;
	int ret;

	/*
	 * Allow devices that do not expose standard PCIe ACS capabilities
	 * or control to indicate their support here.  Multi-function express
	 * devices which do not allow internal peer-to-peer between functions,
	 * but do not implement PCIe ACS may wish to return true here.
	 */
	for (i = pci_dev_acs_enabled; i->acs_enabled; i++) {
		if ((i->vendor == dev->vendor ||
		     i->vendor == (u16)PCI_ANY_ID) &&
		    (i->device == dev->device ||
		     i->device == (u16)PCI_ANY_ID)) {
			ret = i->acs_enabled(dev, acs_flags);
			if (ret >= 0)
				return ret;
		}
	}

	return -ENOTTY;
}