Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

[mirror_ubuntu-jammy-kernel.git] / drivers / pci / quirks.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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 use them.
 */

#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/dmi.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/ktime.h>
#include <linux/mm.h>
#include <linux/nvme.h>
#include <linux/platform_data/x86/apple.h>
#include <linux/pm_runtime.h>
#include <linux/switchtec.h>
#include <asm/dma.h>    /* isa_dma_bridge_buggy */
#include "pci.h"

static ktime_t fixup_debug_start(struct pci_dev *dev,
                                 void (*fn)(struct pci_dev *dev))
{
        if (initcall_debug)
                pci_info(dev, "calling  %pS @ %i\n", fn, task_pid_nr(current));

        return ktime_get();
}

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;

        rettime = ktime_get();
        delta = ktime_sub(rettime, calltime);
        duration = (unsigned long long) ktime_to_ns(delta) >> 10;
        if (initcall_debug || duration > 10000)
                pci_info(dev, "%pS took %lld usecs\n", fn, duration);
}

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)) {
                        void (*hook)(struct pci_dev *dev);
#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
                        hook = offset_to_ptr(&f->hook_offset);
#else
                        hook = f->hook;
#endif
                        calltime = fixup_debug_start(dev, hook);
                        hook(dev);
                        fixup_debug_report(dev, calltime, 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[];
extern struct pci_fixup __start_pci_fixups_suspend_late[];
extern struct pci_fixup __end_pci_fixups_suspend_late[];

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;

        case pci_fixup_suspend_late:
                start = __start_pci_fixups_suspend_late;
                end = __end_pci_fixups_suspend_late;
                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)
                pr_info("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;

                        pci_info(dev, "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) {
                pr_info("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);

/*
 * 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)) {
                        pci_info(d, "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;
                pci_info(dev, "Activating ISA DMA hang workarounds\n");
        }
}
/*
 * It's 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) {
                pci_info(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) {
                pci_info(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 */
                pci_info(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) {
                pci_info(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
 * 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 bit 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);
        pci_info(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) {
                pci_info(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) {
                pci_info(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) {
                pci_info(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) {
                pci_info(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);

/*
 * This chip can cause bus lockups if config addresses above 0x600
 * are read or written.
 */
static void quirk_nfp6000(struct pci_dev *dev)
{
        dev->cfg_size = 0x600;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME,       PCI_DEVICE_ID_NETRONOME_NFP4000,        quirk_nfp6000);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME,       PCI_DEVICE_ID_NETRONOME_NFP6000,        quirk_nfp6000);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME,       PCI_DEVICE_ID_NETRONOME_NFP5000,        quirk_nfp6000);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME,       PCI_DEVICE_ID_NETRONOME_NFP6000_VF,     quirk_nfp6000);

/*  On IBM Crocodile ipr SAS adapters, expand BAR to system page size */
static void quirk_extend_bar_to_page(struct pci_dev *dev)
{
        int i;

        for (i = 0; i < PCI_STD_NUM_BARS; i++) {
                struct resource *r = &dev->resource[i];

                if (r->flags & IORESOURCE_MEM && resource_size(r) < PAGE_SIZE) {
                        r->end = PAGE_SIZE - 1;
                        r->start = 0;
                        r->flags |= IORESOURCE_UNSET;
                        pci_info(dev, "expanded BAR %d to page size: %pR\n",
                                 i, r);
                }
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, 0x034a, quirk_extend_bar_to_page);

/*
 * 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->flags |= IORESOURCE_UNSET;
                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);

static void quirk_io(struct pci_dev *dev, int pos, unsigned size,
                     const char *name)
{
        u32 region;
        struct pci_bus_region bus_region;
        struct resource *res = dev->resource + pos;

        pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + (pos << 2), &region);

        if (!region)
                return;

        res->name = pci_name(dev);
        res->flags = region & ~PCI_BASE_ADDRESS_IO_MASK;
        res->flags |=
                (IORESOURCE_IO | IORESOURCE_PCI_FIXED | IORESOURCE_SIZEALIGN);
        region &= ~(size - 1);

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

        pci_info(dev, FW_BUG "%s quirk: reg 0x%x: %pR\n",
                 name, PCI_BASE_ADDRESS_0 + (pos << 2), res);
}

/*
 * 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).
 *
 * CS553x's ISA PCI BARs may also be read-only (ref:
 * https://bugzilla.kernel.org/show_bug.cgi?id=85991 - Comment #4 forward).
 */
static void quirk_cs5536_vsa(struct pci_dev *dev)
{
        static char *name = "CS5536 ISA bridge";

        if (pci_resource_len(dev, 0) != 8) {
                quirk_io(dev, 0,   8, name);    /* SMB */
                quirk_io(dev, 1, 256, name);    /* GPIO */
                quirk_io(dev, 2,  64, name);    /* MFGPT */
                pci_info(dev, "%s bug detected (incorrect header); workaround applied\n",
                         name);
        }
}
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->bus, res, &bus_region);

        if (!pci_claim_resource(dev, nr))
                pci_info(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)
{
        pci_info(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);

/*
 * In the AMD NL platform, this device ([1022:7912]) has a class code of
 * PCI_CLASS_SERIAL_USB_XHCI (0x0c0330), which means the xhci driver will
 * claim it.
 *
 * But the dwc3 driver is a more specific driver for this device, and we'd
 * prefer to use it instead of xhci. To prevent xhci from claiming the
 * device, change the class code to 0x0c03fe, which the PCI r3.0 spec
 * defines as "USB device (not host controller)". The dwc3 driver can then
 * claim it based on its Vendor and Device ID.
 */
static void quirk_amd_nl_class(struct pci_dev *pdev)
{
        u32 class = pdev->class;

        /* Use "USB Device (not host controller)" class */
        pdev->class = PCI_CLASS_SERIAL_USB_DEVICE;
        pci_info(pdev, "PCI class overridden (%#08x -> %#08x) so dwc3 driver can claim this instead of xhci\n",
                 class, pdev->class);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB,
                quirk_amd_nl_class);

/*
 * Synopsys USB 3.x host HAPS platform has a class code of
 * PCI_CLASS_SERIAL_USB_XHCI, and xhci driver can claim it.  However, these
 * devices should use dwc3-haps driver.  Change these devices' class code to
 * PCI_CLASS_SERIAL_USB_DEVICE to prevent the xhci-pci driver from claiming
 * them.
 */
static void quirk_synopsys_haps(struct pci_dev *pdev)
{
        u32 class = pdev->class;

        switch (pdev->device) {
        case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3:
        case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI:
        case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31:
                pdev->class = PCI_CLASS_SERIAL_USB_DEVICE;
                pci_info(pdev, "PCI class overridden (%#08x -> %#08x) so dwc3 driver can claim this instead of xhci\n",
                         class, pdev->class);
                break;
        }
}
DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_SYNOPSYS, PCI_ANY_ID,
                               PCI_CLASS_SERIAL_USB_XHCI, 0,
                               quirk_synopsys_haps);

/*
 * 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;
        pci_info(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;
        pci_info(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.
         */
        pci_info(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.
         */
        pci_info(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;

        pci_warn(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 */

        pci_info(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)) {
                pci_info(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) {
                pci_warn(dev, "I/O APIC: AMD Erratum #22 may be present. In the event of instability try\n");
                pci_warn(dev, "        : booting with the \"noapic\" option\n");
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD,      PCI_DEVICE_ID_AMD_VIPER_7410,   quirk_amd_ioapic);
#endif /* CONFIG_X86_IO_APIC */

#if defined(CONFIG_ARM64) && defined(CONFIG_PCI_ATS)

static void quirk_cavium_sriov_rnm_link(struct pci_dev *dev)
{
        /* Fix for improper SR-IOV configuration on Cavium cn88xx RNM device */
        if (dev->subsystem_device == 0xa118)
                dev->sriov->link = dev->devfn;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CAVIUM, 0xa018, quirk_cavium_sriov_rnm_link);
#endif

/*
 * 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) {
                pci_info(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)
{
        u8 irq;

        /* VIA ACPI device: SCI IRQ line in PCI config byte 0x42 */
        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) {
                pci_info(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, it's 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;
                pci_warn(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->flags |= IORESOURCE_UNSET;
        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;
                pci_info(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);
                pci_info(pdev, "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;
                pci_info(pdev, "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))) {
                pci_info(pdev, "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)
                        pci_info(dev, "i801 SMBus device continues to play 'hide and seek'! 0x%x\n",
                                 val);
                else
                        pci_info(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(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);

        /* enable the SMBus device */
        writel(val & 0xFFFFFFF7, asus_rcba_base + 0x3418);
}

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;
        pci_info(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) {
                pci_info(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)
                        pci_info(dev, "Onboard AC97/MC97 devices continue to play 'hide and seek'! 0x%x\n",
                                 val);
                else
                        pci_info(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

static void quirk_jmicron_async_suspend(struct pci_dev *dev)
{
        if (dev->multifunction) {
                device_disable_async_suspend(&dev->dev);
                pci_info(dev, "async suspend disabled to avoid multi-function power-on ordering issue\n");
        }
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE, 8, quirk_jmicron_async_suspend);
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_CLASS_STORAGE_SATA_AHCI, 0, quirk_jmicron_async_suspend);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_JMICRON, 0x2362, quirk_jmicron_async_suspend);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_JMICRON, 0x236f, quirk_jmicron_async_suspend);

#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 < PCI_STD_NUM_BARS; 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)
{
        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);

DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, PCI_CLASS_BRIDGE_PCI, 8, 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)
{
        dev->no_msi = 1;
        pci_warn(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);

static void quirk_d3hot_delay(struct pci_dev *dev, unsigned int delay)
{
        if (dev->d3_delay >= delay)
                return;

        dev->d3_delay = delay;
        pci_info(dev, "extending delay after power-on from D3hot to %d msec\n",
                 dev->d3_delay);
}

static void quirk_radeon_pm(struct pci_dev *dev)
{
        if (dev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
            dev->subsystem_device == 0x00e2)
                quirk_d3hot_delay(dev, 20);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6741, quirk_radeon_pm);

/*
 * Ryzen5/7 XHCI controllers fail upon resume from runtime suspend or s2idle.
 * https://bugzilla.kernel.org/show_bug.cgi?id=205587
 *
 * The kernel attempts to transition these devices to D3cold, but that seems
 * to be ineffective on the platforms in question; the PCI device appears to
 * remain on in D3hot state. The D3hot-to-D0 transition then requires an
 * extended delay in order to succeed.
 */
static void quirk_ryzen_xhci_d3hot(struct pci_dev *dev)
{
        quirk_d3hot_delay(dev, 20);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15e0, quirk_ryzen_xhci_d3hot);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15e1, quirk_ryzen_xhci_d3hot);

#ifdef CONFIG_X86_IO_APIC
static int dmi_disable_ioapicreroute(const struct dmi_system_id *d)
{
        noioapicreroute = 1;
        pr_info("%s detected: disable boot interrupt reroute\n", d->ident);

        return 0;
}

static const struct dmi_system_id boot_interrupt_dmi_table[] = {
        /*
         * Systems to exclude from boot interrupt reroute quirks
         */
        {
                .callback = dmi_disable_ioapicreroute,
                .ident = "ASUSTek Computer INC. M2N-LR",
                .matches = {
                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTek Computer INC."),
                        DMI_MATCH(DMI_PRODUCT_NAME, "M2N-LR"),
                },
        },
        {}
};

/*
 * 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)
{
        dmi_check_system(boot_interrupt_dmi_table);
        if (noioapicquirk || noioapicreroute)
                return;

        dev->irq_reroute_variant = INTEL_IRQ_REROUTE_VARIANT;
        pci_info(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);

        pci_info(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);

        pci_info(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);

        pci_info(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) {
                pci_info(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);
        pci_info(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->flags |= IORESOURCE_UNSET;
                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 erratum 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];
                        pci_info(dev, "Re-allocating PLX PCI 9050 BAR %u to length 256 to avoid bit 7 bug\n",
                                 bar);
                        r->flags |= IORESOURCE_UNSET;
                        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;
                /* else, fall through */
        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) {
                        pci_info(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) {
                pci_warn(dev, "Can't map e100 registers\n");
                return;
        }

        cmd_hi = readb(csr + 3);
        if (cmd_hi == 0) {
                pci_warn(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 PCIe link.
 */
static void quirk_disable_aspm_l0s(struct pci_dev *dev)
{
        pci_info(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);

/*
 * Some Pericom PCIe-to-PCI bridges in reverse mode need the PCIe Retrain
 * Link bit cleared after starting the link retrain process to allow this
 * process to finish.
 *
 * Affected devices: PI7C9X110, PI7C9X111SL, PI7C9X130.  See also the
 * Pericom Errata Sheet PI7C9X111SLB_errata_rev1.2_102711.pdf.
 */
static void quirk_enable_clear_retrain_link(struct pci_dev *dev)
{
        dev->clear_retrain_link = 1;
        pci_info(dev, "Enable PCIe Retrain Link quirk\n");
}
DECLARE_PCI_FIXUP_HEADER(0x12d8, 0xe110, quirk_enable_clear_retrain_link);
DECLARE_PCI_FIXUP_HEADER(0x12d8, 0xe111, quirk_enable_clear_retrain_link);
DECLARE_PCI_FIXUP_HEADER(0x12d8, 0xe130, quirk_enable_clear_retrain_link);

static void fixup_rev1_53c810(struct pci_dev *dev)
{
        u32 class = dev->class;

        /*
         * rev 1 ncr53c810 chips don't set the class at all which means
         * they don't get their resources remapped. Fix that here.
         */
        if (class)
                return;

        dev->class = PCI_CLASS_STORAGE_SCSI << 8;
        pci_info(dev, "NCR 53c810 rev 1 PCI class overridden (%#08x -> %#08x)\n",
                 class, dev->class);
}
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) {
                pci_info(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);
                        pci_info(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);

                        pci_info(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);

                        pci_info(dev, "Disabling VIA CX700 PCI caching\n");
                }
        }
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching);

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)) {
                pci_info(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_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();
        pci_warn(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);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, 0x0761, 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) {
                pci_warn(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 = PCI_FIND_CAP_TTL;

        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) {
                        pci_info(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)) {
                pci_warn(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 is supported
 * if the MSI capability is 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 is supported.
         */
        pdev = pci_get_slot(dev->bus, 0);
        if (!pdev)
                return;
        if (!msi_ht_cap_enabled(dev) && !msi_ht_cap_enabled(pdev)) {
                pci_warn(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 = PCI_FIND_CAP_TTL;

        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) {
                        pci_info(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"))) {
                pci_info(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);

/*
 * PCIe spec r4.0 sec 7.7.1.2 and sec 7.7.2.2 say that if MSI/MSI-X is enabled,
 * then the device can't use INTx interrupts. Tegra's PCIe root ports don't
 * generate MSI interrupts for PME and AER events instead only INTx interrupts
 * are generated. Though Tegra's PCIe root ports can generate MSI interrupts
 * for other events, since PCIe specificiation doesn't support using a mix of
 * INTx and MSI/MSI-X, it is required to disable MSI interrupts to avoid port
 * service drivers registering their respective ISRs for MSIs.
 */
static void pci_quirk_nvidia_tegra_disable_rp_msi(struct pci_dev *dev)
{
        dev->no_msi = 1;
}
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad0,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad1,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x1ad2,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf0,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf1,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e1c,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e1d,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e12,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e13,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0fae,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0faf,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x10e5,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_NVIDIA, 0x10e6,
                              PCI_CLASS_BRIDGE_PCI, 8,
                              pci_quirk_nvidia_tegra_disable_rp_msi);

/*
 * 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))) {
                pr_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 = PCI_FIND_CAP_TTL;
        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 = PCI_FIND_CAP_TTL;

        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) {
                        pci_info(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_domain_bus_and_slot(pci_domain_nr(dev->bus), 0,
                                                  PCI_DEVFN(0, 0));
        if (host_bridge == NULL) {
                pci_warn(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);
}
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 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);

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) {
                pci_info(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);

/*
 * Amazon's Annapurna Labs 1c36:0031 Root Ports don't support MSI-X, so it
 * should be disabled on platforms where the device (mistakenly) advertises it.
 *
 * Notice that this quirk also disables MSI (which may work, but hasn't been
 * tested), since currently there is no standard way to disable only MSI-X.
 *
 * The 0031 device id is reused for other non Root Port device types,
 * therefore the quirk is registered for the PCI_CLASS_BRIDGE_PCI class.
 */
static void quirk_al_msi_disable(struct pci_dev *dev)
{
        dev->no_msi = 1;
        pci_warn(dev, "Disabling MSI/MSI-X\n");
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031,
                              PCI_CLASS_BRIDGE_PCI, 8, quirk_al_msi_disable);
#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
 * multifunction 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)
{
        u8 write_enable;
        u8 write_target;
        u8 disable;

        /*
         * Disable via CardBus interface
         *
         * This 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);

        pci_notice(dev, "proprietary Ricoh MMC controller disabled (via CardBus function)\n");
        pci_notice(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)
{
        u8 write_enable;
        u8 disable;

        /*
         * Disable via FireWire interface
         *
         * This 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);

                pci_notice(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);

        pci_notice(dev, "proprietary Ricoh MMC controller disabled (via FireWire function)\n");
        pci_notice(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. Without 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)
{
        u32 class = dev->class;

        /* TI 816x devices do not have class code set when in PCIe boot mode */
        dev->class = PCI_CLASS_MULTIMEDIA_VIDEO << 8;
        pci_info(dev, "PCI class overridden (%#08x -> %#08x)\n",
                 class, dev->class);
}
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_TI, 0xb800,
                              PCI_CLASS_NOT_DEFINED, 8, 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 erratum 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 ||
            pcie_bus_config == PCIE_BUS_DEFAULT)
                return;

        /*
         * Intel erratum 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) {
                pci_err(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) {
                pci_err(dev, "Error attempting to write the read completion coalescing register\n");
                return;
        }

        pr_info_once("Read completion coalescing disabled due to hardware erratum 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);

/*
 * Some BIOS implementations leave the Intel GPU interrupts enabled, even
 * though no one is handling them (e.g., if the 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) {
                pci_warn(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) {
                pci_warn(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, 0x0042, disable_igfx_irq);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0046, disable_igfx_irq);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x004a, disable_igfx_irq);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0106, disable_igfx_irq);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0152, 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;
}
/* C600 Series devices do not need 10ms d3_delay */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0412, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0c00, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0c0c, quirk_remove_d3_delay);
/* Lynxpoint-H PCH devices do not need 10ms d3_delay */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c02, 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, 0x8c20, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c22, 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, 0x8c2d, 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, 0x8c4e, quirk_remove_d3_delay);
/* Intel Cherrytrail devices do not need 10ms d3_delay */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2280, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2298, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x229c, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b0, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b5, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b7, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b8, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22d8, quirk_remove_d3_delay);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22dc, 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_FINAL(PCI_VENDOR_ID_CHELSIO, 0x0030,
                        quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(0x1814, 0x0601, /* Ralink RT2800 802.11n PCI */
                        quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(0x1b7c, 0x0004, /* Ceton InfiniTV4 */
                        quirk_broken_intx_masking);

/*
 * Realtek RTL8169 PCI Gigabit Ethernet Controller (rev 10)
 * Subsystem: Realtek RTL8169/8110 Family PCI Gigabit Ethernet NIC
 *
 * RTL8110SC - Fails under PCI device assignment using DisINTx masking.
 */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, 0x8169,
                        quirk_broken_intx_masking);

/*
 * Intel i40e (XL710/X710) 10/20/40GbE NICs all have broken INTx masking,
 * DisINTx can be set but the interrupt status bit is non-functional.
 */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1572, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1574, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1580, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1581, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1583, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1584, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1585, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1586, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1587, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1588, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1589, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158a, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158b, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d0, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d1, quirk_broken_intx_masking);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d2, quirk_broken_intx_masking);

static u16 mellanox_broken_intx_devs[] = {
        PCI_DEVICE_ID_MELLANOX_HERMON_SDR,
        PCI_DEVICE_ID_MELLANOX_HERMON_DDR,
        PCI_DEVICE_ID_MELLANOX_HERMON_QDR,
        PCI_DEVICE_ID_MELLANOX_HERMON_DDR_GEN2,
        PCI_DEVICE_ID_MELLANOX_HERMON_QDR_GEN2,
        PCI_DEVICE_ID_MELLANOX_HERMON_EN,
        PCI_DEVICE_ID_MELLANOX_HERMON_EN_GEN2,
        PCI_DEVICE_ID_MELLANOX_CONNECTX_EN,
        PCI_DEVICE_ID_MELLANOX_CONNECTX_EN_T_GEN2,
        PCI_DEVICE_ID_MELLANOX_CONNECTX_EN_GEN2,
        PCI_DEVICE_ID_MELLANOX_CONNECTX_EN_5_GEN2,
        PCI_DEVICE_ID_MELLANOX_CONNECTX2,
        PCI_DEVICE_ID_MELLANOX_CONNECTX3,
        PCI_DEVICE_ID_MELLANOX_CONNECTX3_PRO,
};

#define CONNECTX_4_CURR_MAX_MINOR 99
#define CONNECTX_4_INTX_SUPPORT_MINOR 14

/*
 * Check ConnectX-4/LX FW version to see if it supports legacy interrupts.
 * If so, don't mark it as broken.
 * FW minor > 99 means older FW version format and no INTx masking support.
 * FW minor < 14 means new FW version format and no INTx masking support.
 */
static void mellanox_check_broken_intx_masking(struct pci_dev *pdev)
{
        __be32 __iomem *fw_ver;
        u16 fw_major;
        u16 fw_minor;
        u16 fw_subminor;
        u32 fw_maj_min;
        u32 fw_sub_min;
        int i;

        for (i = 0; i < ARRAY_SIZE(mellanox_broken_intx_devs); i++) {
                if (pdev->device == mellanox_broken_intx_devs[i]) {
                        pdev->broken_intx_masking = 1;
                        return;
                }
        }

        /*
         * Getting here means Connect-IB cards and up. Connect-IB has no INTx
         * support so shouldn't be checked further
         */
        if (pdev->device == PCI_DEVICE_ID_MELLANOX_CONNECTIB)
                return;

        if (pdev->device != PCI_DEVICE_ID_MELLANOX_CONNECTX4 &&
            pdev->device != PCI_DEVICE_ID_MELLANOX_CONNECTX4_LX)
                return;

        /* For ConnectX-4 and ConnectX-4LX, need to check FW support */
        if (pci_enable_device_mem(pdev)) {
                pci_warn(pdev, "Can't enable device memory\n");
                return;
        }

        fw_ver = ioremap(pci_resource_start(pdev, 0), 4);
        if (!fw_ver) {
                pci_warn(pdev, "Can't map ConnectX-4 initialization segment\n");
                goto out;
        }

        /* Reading from resource space should be 32b aligned */
        fw_maj_min = ioread32be(fw_ver);
        fw_sub_min = ioread32be(fw_ver + 1);
        fw_major = fw_maj_min & 0xffff;
        fw_minor = fw_maj_min >> 16;
        fw_subminor = fw_sub_min & 0xffff;
        if (fw_minor > CONNECTX_4_CURR_MAX_MINOR ||
            fw_minor < CONNECTX_4_INTX_SUPPORT_MINOR) {
                pci_warn(pdev, "ConnectX-4: FW %u.%u.%u doesn't support INTx masking, disabling. Please upgrade FW to %d.14.1100 and up for INTx support\n",
                         fw_major, fw_minor, fw_subminor, pdev->device ==
                         PCI_DEVICE_ID_MELLANOX_CONNECTX4 ? 12 : 14);
                pdev->broken_intx_masking = 1;
        }

        iounmap(fw_ver);

out:
        pci_disable_device(pdev);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_ANY_ID,
                        mellanox_check_broken_intx_masking);

static void quirk_no_bus_reset(struct pci_dev *dev)
{
        dev->dev_flags |= PCI_DEV_FLAGS_NO_BUS_RESET;
}

/*
 * Some Atheros AR9xxx and QCA988x chips do not behave after a bus reset.
 * The device will throw a Link Down error on AER-capable systems and
 * regardless of AER, config space of the device is never accessible again
 * and typically causes the system to hang or reset when access is attempted.
 * http://www.spinics.net/lists/linux-pci/msg34797.html
 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0030, quirk_no_bus_reset);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0032, quirk_no_bus_reset);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003c, quirk_no_bus_reset);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0033, quirk_no_bus_reset);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0034, quirk_no_bus_reset);

/*
 * Root port on some Cavium CN8xxx chips do not successfully complete a bus
 * reset when used with certain child devices.  After the reset, config
 * accesses to the child may fail.
 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset);

static void quirk_no_pm_reset(struct pci_dev *dev)
{
        /*
         * We can't do a bus reset on root bus devices, but an ineffective
         * PM reset may be better than nothing.
         */
        if (!pci_is_root_bus(dev->bus))
                dev->dev_flags |= PCI_DEV_FLAGS_NO_PM_RESET;
}

/*
 * Some AMD/ATI GPUS (HD8570 - Oland) report that a D3hot->D0 transition
 * causes a reset (i.e., they advertise NoSoftRst-).  This transition seems
 * to have no effect on the device: it retains the framebuffer contents and
 * monitor sync.  Advertising this support makes other layers, like VFIO,
 * assume pci_reset_function() is viable for this device.  Mark it as
 * unavailable to skip it when testing reset methods.
 */
DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
                               PCI_CLASS_DISPLAY_VGA, 8, quirk_no_pm_reset);

/*
 * Thunderbolt controllers with broken MSI hotplug signaling:
 * Entire 1st generation (Light Ridge, Eagle Ridge, Light Peak) and part
 * of the 2nd generation (Cactus Ridge 4C up to revision 1, Port Ridge).
 */
static void quirk_thunderbolt_hotplug_msi(struct pci_dev *pdev)
{
        if (pdev->is_hotplug_bridge &&
            (pdev->device != PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C ||
             pdev->revision <= 1))
                pdev->no_msi = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_RIDGE,
                        quirk_thunderbolt_hotplug_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EAGLE_RIDGE,
                        quirk_thunderbolt_hotplug_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_PEAK,
                        quirk_thunderbolt_hotplug_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
                        quirk_thunderbolt_hotplug_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
                        quirk_thunderbolt_hotplug_msi);

#ifdef CONFIG_ACPI
/*
 * Apple: Shutdown Cactus Ridge Thunderbolt controller.
 *
 * On Apple hardware the Cactus Ridge Thunderbolt controller needs to be
 * shutdown before suspend. Otherwise the native host interface (NHI) will not
 * be present after resume if a device was plugged in before suspend.
 *
 * The Thunderbolt controller consists of a PCIe switch with downstream
 * bridges leading to the NHI and to the tunnel PCI bridges.
 *
 * This quirk cuts power to the whole chip. Therefore we have to apply it
 * during suspend_noirq of the upstream bridge.
 *
 * Power is automagically restored before resume. No action is needed.
 */
static void quirk_apple_poweroff_thunderbolt(struct pci_dev *dev)
{
        acpi_handle bridge, SXIO, SXFP, SXLV;

        if (!x86_apple_machine)
                return;
        if (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM)
                return;
        bridge = ACPI_HANDLE(&dev->dev);
        if (!bridge)
                return;

        /*
         * SXIO and SXLV are present only on machines requiring this quirk.
         * Thunderbolt bridges in external devices might have the same
         * device ID as those on the host, but they will not have the
         * associated ACPI methods. This implicitly checks that we are at
         * the right bridge.
         */
        if (ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXIO", &SXIO))
            || ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXFP", &SXFP))
            || ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXLV", &SXLV)))
                return;
        pci_info(dev, "quirk: cutting power to Thunderbolt controller...\n");

        /* magic sequence */
        acpi_execute_simple_method(SXIO, NULL, 1);
        acpi_execute_simple_method(SXFP, NULL, 0);
        msleep(300);
        acpi_execute_simple_method(SXLV, NULL, 0);
        acpi_execute_simple_method(SXIO, NULL, 0);
        acpi_execute_simple_method(SXLV, NULL, 0);
}
DECLARE_PCI_FIXUP_SUSPEND_LATE(PCI_VENDOR_ID_INTEL,
                               PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
                               quirk_apple_poweroff_thunderbolt);

/*
 * Apple: Wait for the Thunderbolt controller to reestablish PCI tunnels
 *
 * During suspend the Thunderbolt controller is reset and all PCI
 * tunnels are lost. The NHI driver will try to reestablish all tunnels
 * during resume. We have to manually wait for the NHI since there is
 * no parent child relationship between the NHI and the tunneled
 * bridges.
 */
static void quirk_apple_wait_for_thunderbolt(struct pci_dev *dev)
{
        struct pci_dev *sibling = NULL;
        struct pci_dev *nhi = NULL;

        if (!x86_apple_machine)
                return;
        if (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)
                return;

        /*
         * Find the NHI and confirm that we are a bridge on the Thunderbolt
         * host controller and not on a Thunderbolt endpoint.
         */
        sibling = pci_get_slot(dev->bus, 0x0);
        if (sibling == dev)
                goto out; /* we are the downstream bridge to the NHI */
        if (!sibling || !sibling->subordinate)
                goto out;
        nhi = pci_get_slot(sibling->subordinate, 0x0);
        if (!nhi)
                goto out;
        if (nhi->vendor != PCI_VENDOR_ID_INTEL
                    || (nhi->device != PCI_DEVICE_ID_INTEL_LIGHT_RIDGE &&
                        nhi->device != PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C &&
                        nhi->device != PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI &&
                        nhi->device != PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI)
                    || nhi->class != PCI_CLASS_SYSTEM_OTHER << 8)
                goto out;
        pci_info(dev, "quirk: waiting for Thunderbolt to reestablish PCI tunnels...\n");
        device_pm_wait_for_dev(&dev->dev, &nhi->dev);
out:
        pci_dev_put(nhi);
        pci_dev_put(sibling);
}
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,
                               PCI_DEVICE_ID_INTEL_LIGHT_RIDGE,
                               quirk_apple_wait_for_thunderbolt);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,
                               PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
                               quirk_apple_wait_for_thunderbolt);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,
                               PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE,
                               quirk_apple_wait_for_thunderbolt);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,
                               PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE,
                               quirk_apple_wait_for_thunderbolt);
#endif

/*
 * Following 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_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).
         * Thus we must call pcie_flr() directly without first checking if it is
         * supported.
         */
        if (!probe)
                pcie_flr(dev);
        return 0;
}

#define SOUTH_CHICKEN2          0xc2004
#define PCH_PP_STATUS           0xc7200
#define PCH_PP_CONTROL          0xc7204
#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));
        pci_warn(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);

        pcie_flr(dev);

        /*
         * 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

/*
 * The Samsung SM961/PM961 controller can sometimes enter a fatal state after
 * FLR where config space reads from the device return -1.  We seem to be
 * able to avoid this condition if we disable the NVMe controller prior to
 * FLR.  This quirk is generic for any NVMe class device requiring similar
 * assistance to quiesce the device prior to FLR.
 *
 * NVMe specification: https://nvmexpress.org/resources/specifications/
 * Revision 1.0e:
 *    Chapter 2: Required and optional PCI config registers
 *    Chapter 3: NVMe control registers
 *    Chapter 7.3: Reset behavior
 */
static int nvme_disable_and_flr(struct pci_dev *dev, int probe)
{
        void __iomem *bar;
        u16 cmd;
        u32 cfg;

        if (dev->class != PCI_CLASS_STORAGE_EXPRESS ||
            !pcie_has_flr(dev) || !pci_resource_start(dev, 0))
                return -ENOTTY;

        if (probe)
                return 0;

        bar = pci_iomap(dev, 0, NVME_REG_CC + sizeof(cfg));
        if (!bar)
                return -ENOTTY;

        pci_read_config_word(dev, PCI_COMMAND, &cmd);
        pci_write_config_word(dev, PCI_COMMAND, cmd | PCI_COMMAND_MEMORY);

        cfg = readl(bar + NVME_REG_CC);

        /* Disable controller if enabled */
        if (cfg & NVME_CC_ENABLE) {
                u32 cap = readl(bar + NVME_REG_CAP);
                unsigned long timeout;

                /*
                 * Per nvme_disable_ctrl() skip shutdown notification as it
                 * could complete commands to the admin queue.  We only intend
                 * to quiesce the device before reset.
                 */
                cfg &= ~(NVME_CC_SHN_MASK | NVME_CC_ENABLE);

                writel(cfg, bar + NVME_REG_CC);

                /*
                 * Some controllers require an additional delay here, see
                 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY.  None of those are yet
                 * supported by this quirk.
                 */

                /* Cap register provides max timeout in 500ms increments */
                timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies;

                for (;;) {
                        u32 status = readl(bar + NVME_REG_CSTS);

                        /* Ready status becomes zero on disable complete */
                        if (!(status & NVME_CSTS_RDY))
                                break;

                        msleep(100);

                        if (time_after(jiffies, timeout)) {
                                pci_warn(dev, "Timeout waiting for NVMe ready status to clear after disable\n");
                                break;
                        }
                }
        }

        pci_iounmap(dev, bar);

        pcie_flr(dev);

        return 0;
}

/*
 * Intel DC P3700 NVMe controller will timeout waiting for ready status
 * to change after NVMe enable if the driver starts interacting with the
 * device too soon after FLR.  A 250ms delay after FLR has heuristically
 * proven to produce reliably working results for device assignment cases.
 */
static int delay_250ms_after_flr(struct pci_dev *dev, int probe)
{
        if (!pcie_has_flr(dev))
                return -ENOTTY;

        if (probe)
                return 0;

        pcie_flr(dev);

        msleep(250);

        return 0;
}

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_SAMSUNG, 0xa804, nvme_disable_and_flr },
        { PCI_VENDOR_ID_INTEL, 0x0953, delay_250ms_after_flr },
        { 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 void quirk_dma_func0_alias(struct pci_dev *dev)
{
        if (PCI_FUNC(dev->devfn) != 0)
                pci_add_dma_alias(dev, PCI_DEVFN(PCI_SLOT(dev->devfn), 0), 1);
}

/*
 * https://bugzilla.redhat.com/show_bug.cgi?id=605888
 *
 * Some Ricoh devices use function 0 as the PCIe requester ID for DMA.
 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH, 0xe832, quirk_dma_func0_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH, 0xe476, quirk_dma_func0_alias);

static void quirk_dma_func1_alias(struct pci_dev *dev)
{
        if (PCI_FUNC(dev->devfn) != 1)
                pci_add_dma_alias(dev, PCI_DEVFN(PCI_SLOT(dev->devfn), 1), 1);
}

/*
 * Marvell 88SE9123 uses function 1 as the requester ID for DMA.  In some
 * SKUs function 1 is present and is a legacy IDE controller, in other
 * SKUs this function is not present, making this a ghost requester.
 * https://bugzilla.kernel.org/show_bug.cgi?id=42679
 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9120,
                         quirk_dma_func1_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9123,
                         quirk_dma_func1_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9128,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c14 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9130,
                         quirk_dma_func1_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9170,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c47 + c57 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9172,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c59 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x917a,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c78 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9182,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c134 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9183,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c46 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x91a0,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c127 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9220,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c49 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9230,
                         quirk_dma_func1_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TTI, 0x0642,
                         quirk_dma_func1_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TTI, 0x0645,
                         quirk_dma_func1_alias);
/* https://bugs.gentoo.org/show_bug.cgi?id=497630 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_JMICRON,
                         PCI_DEVICE_ID_JMICRON_JMB388_ESD,
                         quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c117 */
DECLARE_PCI_FIXUP_HEADER(0x1c28, /* Lite-On */
                         0x0122, /* Plextor M6E (Marvell 88SS9183)*/
                         quirk_dma_func1_alias);

/*
 * Some devices DMA with the wrong devfn, not just the wrong function.
 * quirk_fixed_dma_alias() uses this table to create fixed aliases, where
 * the alias is "fixed" and independent of the device devfn.
 *
 * For example, the Adaptec 3405 is a PCIe card with an Intel 80333 I/O
 * processor.  To software, this appears as a PCIe-to-PCI/X bridge with a
 * single device on the secondary bus.  In reality, the single exposed
 * device at 0e.0 is the Address Translation Unit (ATU) of the controller
 * that provides a bridge to the internal bus of the I/O processor.  The
 * controller supports private devices, which can be hidden from PCI config
 * space.  In the case of the Adaptec 3405, a private device at 01.0
 * appears to be the DMA engine, which therefore needs to become a DMA
 * alias for the device.
 */
static const struct pci_device_id fixed_dma_alias_tbl[] = {
        { PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x0285,
                         PCI_VENDOR_ID_ADAPTEC2, 0x02bb), /* Adaptec 3405 */
          .driver_data = PCI_DEVFN(1, 0) },
        { PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x0285,
                         PCI_VENDOR_ID_ADAPTEC2, 0x02bc), /* Adaptec 3805 */
          .driver_data = PCI_DEVFN(1, 0) },
        { 0 }
};

static void quirk_fixed_dma_alias(struct pci_dev *dev)
{
        const struct pci_device_id *id;

        id = pci_match_id(fixed_dma_alias_tbl, dev);
        if (id)
                pci_add_dma_alias(dev, id->driver_data, 1);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ADAPTEC2, 0x0285, quirk_fixed_dma_alias);

/*
 * A few PCIe-to-PCI bridges fail to expose a PCIe capability, resulting in
 * using the wrong DMA alias for the device.  Some of these devices can be
 * used as either forward or reverse bridges, so we need to test whether the
 * device is operating in the correct mode.  We could probably apply this
 * quirk to PCI_ANY_ID, but for now we'll just use known offenders.  The test
 * is for a non-root, non-PCIe bridge where the upstream device is PCIe and
 * is not a PCIe-to-PCI bridge, then @pdev is actually a PCIe-to-PCI bridge.
 */
static void quirk_use_pcie_bridge_dma_alias(struct pci_dev *pdev)
{
        if (!pci_is_root_bus(pdev->bus) &&
            pdev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
            !pci_is_pcie(pdev) && pci_is_pcie(pdev->bus->self) &&
            pci_pcie_type(pdev->bus->self) != PCI_EXP_TYPE_PCI_BRIDGE)
                pdev->dev_flags |= PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS;
}
/* ASM1083/1085, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c46 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ASMEDIA, 0x1080,
                         quirk_use_pcie_bridge_dma_alias);
/* Tundra 8113, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c43 */
DECLARE_PCI_FIXUP_HEADER(0x10e3, 0x8113, quirk_use_pcie_bridge_dma_alias);
/* ITE 8892, https://bugzilla.kernel.org/show_bug.cgi?id=73551 */
DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8892, quirk_use_pcie_bridge_dma_alias);
/* ITE 8893 has the same problem as the 8892 */
DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8893, quirk_use_pcie_bridge_dma_alias);
/* Intel 82801, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c49 */
DECLARE_PCI_FIXUP_HEADER(0x8086, 0x244e, quirk_use_pcie_bridge_dma_alias);

/*
 * MIC x200 NTB forwards PCIe traffic using multiple alien RIDs. They have to
 * be added as aliases to the DMA device in order to allow buffer access
 * when IOMMU is enabled. Following devfns have to match RIT-LUT table
 * programmed in the EEPROM.
 */
static void quirk_mic_x200_dma_alias(struct pci_dev *pdev)
{
        pci_add_dma_alias(pdev, PCI_DEVFN(0x10, 0x0), 1);
        pci_add_dma_alias(pdev, PCI_DEVFN(0x11, 0x0), 1);
        pci_add_dma_alias(pdev, PCI_DEVFN(0x12, 0x3), 1);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2260, quirk_mic_x200_dma_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2264, quirk_mic_x200_dma_alias);

/*
 * Intel Visual Compute Accelerator (VCA) is a family of PCIe add-in devices
 * exposing computational units via Non Transparent Bridges (NTB, PEX 87xx).
 *
 * Similarly to MIC x200, we need to add DMA aliases to allow buffer access
 * when IOMMU is enabled.  These aliases allow computational unit access to
 * host memory.  These aliases mark the whole VCA device as one IOMMU
 * group.
 *
 * All possible slot numbers (0x20) are used, since we are unable to tell
 * what slot is used on other side.  This quirk is intended for both host
 * and computational unit sides.  The VCA devices have up to five functions
 * (four for DMA channels and one additional).
 */
static void quirk_pex_vca_alias(struct pci_dev *pdev)
{
        const unsigned int num_pci_slots = 0x20;
        unsigned int slot;

        for (slot = 0; slot < num_pci_slots; slot++)
                pci_add_dma_alias(pdev, PCI_DEVFN(slot, 0x0), 5);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2954, quirk_pex_vca_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2955, quirk_pex_vca_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2956, quirk_pex_vca_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2958, quirk_pex_vca_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2959, quirk_pex_vca_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x295A, quirk_pex_vca_alias);

/*
 * The IOMMU and interrupt controller on Broadcom Vulcan/Cavium ThunderX2 are
 * associated not at the root bus, but at a bridge below. This quirk avoids
 * generating invalid DMA aliases.
 */
static void quirk_bridge_cavm_thrx2_pcie_root(struct pci_dev *pdev)
{
        pdev->dev_flags |= PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9000,
                                quirk_bridge_cavm_thrx2_pcie_root);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9084,
                                quirk_bridge_cavm_thrx2_pcie_root);

/*
 * Intersil/Techwell TW686[4589]-based video capture cards have an empty (zero)
 * class code.  Fix it.
 */
static void quirk_tw686x_class(struct pci_dev *pdev)
{
        u32 class = pdev->class;

        /* Use "Multimedia controller" class */
        pdev->class = (PCI_CLASS_MULTIMEDIA_OTHER << 8) | 0x01;
        pci_info(pdev, "TW686x PCI class overridden (%#08x -> %#08x)\n",
                 class, pdev->class);
}
DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6864, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_tw686x_class);
DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6865, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_tw686x_class);
DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6868, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_tw686x_class);
DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6869, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_tw686x_class);

/*
 * Some devices have problems with Transaction Layer Packets with the Relaxed
 * Ordering Attribute set.  Such devices should mark themselves and other
 * device drivers should check before sending TLPs with RO set.
 */
static void quirk_relaxedordering_disable(struct pci_dev *dev)
{
        dev->dev_flags |= PCI_DEV_FLAGS_NO_RELAXED_ORDERING;
        pci_info(dev, "Disable Relaxed Ordering Attributes to avoid PCIe Completion erratum\n");
}

/*
 * Intel Xeon processors based on Broadwell/Haswell microarchitecture Root
 * Complex have a Flow Control Credit issue which can cause performance
 * problems with Upstream Transaction Layer Packets with Relaxed Ordering set.
 */
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f01, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f02, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f03, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f04, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f05, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f06, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f07, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f08, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f09, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0a, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0b, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0c, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0d, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f0e, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f01, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f02, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f03, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f04, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f05, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f06, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f07, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f08, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f09, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0a, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0b, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0c, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0d, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0e, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);

/*
 * The AMD ARM A1100 (aka "SEATTLE") SoC has a bug in its PCIe Root Complex
 * where Upstream Transaction Layer Packets with the Relaxed Ordering
 * Attribute clear are allowed to bypass earlier TLPs with Relaxed Ordering
 * set.  This is a violation of the PCIe 3.0 Transaction Ordering Rules
 * outlined in Section 2.4.1 (PCI Express(r) Base Specification Revision 3.0
 * November 10, 2010).  As a result, on this platform we can't use Relaxed
 * Ordering for Upstream TLPs.
 */
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AMD, 0x1a00, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AMD, 0x1a01, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AMD, 0x1a02, PCI_CLASS_NOT_DEFINED, 8,
                              quirk_relaxedordering_disable);

/*
 * Per PCIe r3.0, sec 2.2.9, "Completion headers must supply the same
 * values for the Attribute as were supplied in the header of the
 * corresponding Request, except as explicitly allowed when IDO is used."
 *
 * If a non-compliant device generates a completion with a different
 * attribute than the request, the receiver may accept it (which itself
 * seems non-compliant based on sec 2.3.2), or it may handle it as a
 * Malformed TLP or an Unexpected Completion, which will probably lead to a
 * device access timeout.
 *
 * If the non-compliant device generates completions with zero attributes
 * (instead of copying the attributes from the request), we can work around
 * this by disabling the "Relaxed Ordering" and "No Snoop" attributes in
 * upstream devices so they always generate requests with zero attributes.
 *
 * This affects other devices under the same Root Port, but since these
 * attributes are performance hints, there should be no functional problem.
 *
 * Note that Configuration Space accesses are never supposed to have TLP
 * Attributes, so we're safe waiting till after any Configuration Space
 * accesses to do the Root Port fixup.
 */
static void quirk_disable_root_port_attributes(struct pci_dev *pdev)
{
        struct pci_dev *root_port = pci_find_pcie_root_port(pdev);

        if (!root_port) {
                pci_warn(pdev, "PCIe Completion erratum may cause device errors\n");
                return;
        }

        pci_info(root_port, "Disabling No Snoop/Relaxed Ordering Attributes to avoid PCIe Completion erratum in %s\n",
                 dev_name(&pdev->dev));
        pcie_capability_clear_and_set_word(root_port, PCI_EXP_DEVCTL,
                                           PCI_EXP_DEVCTL_RELAX_EN |
                                           PCI_EXP_DEVCTL_NOSNOOP_EN, 0);
}

/*
 * The Chelsio T5 chip fails to copy TLP Attributes from a Request to the
 * Completion it generates.
 */
static void quirk_chelsio_T5_disable_root_port_attributes(struct pci_dev *pdev)
{
        /*
         * This mask/compare operation selects for Physical Function 4 on a
         * T5.  We only need to fix up the Root Port once for any of the
         * PFs.  PF[0..3] have PCI Device IDs of 0x50xx, but PF4 is uniquely
         * 0x54xx so we use that one.
         */
        if ((pdev->device & 0xff00) == 0x5400)
                quirk_disable_root_port_attributes(pdev);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
                         quirk_chelsio_T5_disable_root_port_attributes);

/*
 * pci_acs_ctrl_enabled - compare desired ACS controls with those provided
 *                        by a device
 * @acs_ctrl_req: Bitmask of desired ACS controls
 * @acs_ctrl_ena: Bitmask of ACS controls enabled or provided implicitly by
 *                the hardware design
 *
 * Return 1 if all ACS controls in the @acs_ctrl_req bitmask are included
 * in @acs_ctrl_ena, i.e., the device provides all the access controls the
 * caller desires.  Return 0 otherwise.
 */
static int pci_acs_ctrl_enabled(u16 acs_ctrl_req, u16 acs_ctrl_ena)
{
        if ((acs_ctrl_req & acs_ctrl_ena) == acs_ctrl_req)
                return 1;
        return 0;
}

/*
 * 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
 *
 * https://bugzilla.kernel.org/show_bug.cgi?id=81841#c15
 *
 * 1022:780f [AMD] FCH PCI Bridge
 * 1022:7809 [AMD] FCH USB OHCI 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 pci_acs_ctrl_enabled(acs_flags, PCI_ACS_RR | PCI_ACS_CR);
#else
        return -ENODEV;
#endif
}

static bool pci_quirk_cavium_acs_match(struct pci_dev *dev)
{
        if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
                return false;

        switch (dev->device) {
        /*
         * Effectively selects all downstream ports for whole ThunderX1
         * (which represents 8 SoCs).
         */
        case 0xa000 ... 0xa7ff: /* ThunderX1 */
        case 0xaf84:  /* ThunderX2 */
        case 0xb884:  /* ThunderX3 */
                return true;
        default:
                return false;
        }
}

static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags)
{
        if (!pci_quirk_cavium_acs_match(dev))
                return -ENOTTY;

        /*
         * Cavium Root Ports don't advertise an ACS capability.  However,
         * the RTL internally implements similar protection as if ACS had
         * Source Validation, Request Redirection, Completion Redirection,
         * and Upstream Forwarding features enabled.  Assert that the
         * hardware implements and enables equivalent ACS functionality for
         * these flags.
         */
        return pci_acs_ctrl_enabled(acs_flags,
                PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
}

static int pci_quirk_xgene_acs(struct pci_dev *dev, u16 acs_flags)
{
        /*
         * X-Gene Root Ports matching this quirk do not allow peer-to-peer
         * transactions with others, allowing masking out these bits as if they
         * were unimplemented in the ACS capability.
         */
        return pci_acs_ctrl_enabled(acs_flags,
                PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
}

/*
 * Many Intel PCH Root Ports do provide ACS-like features to disable peer
 * transactions and validate bus numbers in requests, but do not provide an
 * actual PCIe ACS capability.  This is the list of device IDs known to fall
 * into that category as provided by Intel in Red Hat bugzilla 1037684.
 */
static const u16 pci_quirk_intel_pch_acs_ids[] = {
        /* Ibexpeak PCH */
        0x3b42, 0x3b43, 0x3b44, 0x3b45, 0x3b46, 0x3b47, 0x3b48, 0x3b49,
        0x3b4a, 0x3b4b, 0x3b4c, 0x3b4d, 0x3b4e, 0x3b4f, 0x3b50, 0x3b51,
        /* Cougarpoint PCH */
        0x1c10, 0x1c11, 0x1c12, 0x1c13, 0x1c14, 0x1c15, 0x1c16, 0x1c17,
        0x1c18, 0x1c19, 0x1c1a, 0x1c1b, 0x1c1c, 0x1c1d, 0x1c1e, 0x1c1f,
        /* Pantherpoint PCH */
        0x1e10, 0x1e11, 0x1e12, 0x1e13, 0x1e14, 0x1e15, 0x1e16, 0x1e17,
        0x1e18, 0x1e19, 0x1e1a, 0x1e1b, 0x1e1c, 0x1e1d, 0x1e1e, 0x1e1f,
        /* Lynxpoint-H PCH */
        0x8c10, 0x8c11, 0x8c12, 0x8c13, 0x8c14, 0x8c15, 0x8c16, 0x8c17,
        0x8c18, 0x8c19, 0x8c1a, 0x8c1b, 0x8c1c, 0x8c1d, 0x8c1e, 0x8c1f,
        /* Lynxpoint-LP PCH */
        0x9c10, 0x9c11, 0x9c12, 0x9c13, 0x9c14, 0x9c15, 0x9c16, 0x9c17,
        0x9c18, 0x9c19, 0x9c1a, 0x9c1b,
        /* Wildcat PCH */
        0x9c90, 0x9c91, 0x9c92, 0x9c93, 0x9c94, 0x9c95, 0x9c96, 0x9c97,
        0x9c98, 0x9c99, 0x9c9a, 0x9c9b,
        /* Patsburg (X79) PCH */
        0x1d10, 0x1d12, 0x1d14, 0x1d16, 0x1d18, 0x1d1a, 0x1d1c, 0x1d1e,
        /* Wellsburg (X99) PCH */
        0x8d10, 0x8d11, 0x8d12, 0x8d13, 0x8d14, 0x8d15, 0x8d16, 0x8d17,
        0x8d18, 0x8d19, 0x8d1a, 0x8d1b, 0x8d1c, 0x8d1d, 0x8d1e,
        /* Lynx Point (9 series) PCH */
        0x8c90, 0x8c92, 0x8c94, 0x8c96, 0x8c98, 0x8c9a, 0x8c9c, 0x8c9e,
};

static bool pci_quirk_intel_pch_acs_match(struct pci_dev *dev)
{
        int i;

        /* Filter out a few obvious non-matches first */
        if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
                return false;

        for (i = 0; i < ARRAY_SIZE(pci_quirk_intel_pch_acs_ids); i++)
                if (pci_quirk_intel_pch_acs_ids[i] == dev->device)
                        return true;

        return false;
}

static int pci_quirk_intel_pch_acs(struct pci_dev *dev, u16 acs_flags)
{
        if (!pci_quirk_intel_pch_acs_match(dev))
                return -ENOTTY;

        if (dev->dev_flags & PCI_DEV_FLAGS_ACS_ENABLED_QUIRK)
                return pci_acs_ctrl_enabled(acs_flags,
                        PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);

        return pci_acs_ctrl_enabled(acs_flags, 0);
}

/*
 * These QCOM Root Ports do provide ACS-like features to disable peer
 * transactions and validate bus numbers in requests, but do not provide an
 * actual PCIe ACS capability.  Hardware supports source validation but it
 * will report the issue as Completer Abort instead of ACS Violation.
 * Hardware doesn't support peer-to-peer and each Root Port is a Root
 * Complex with unique segment numbers.  It is not possible for one Root
 * Port to pass traffic to another Root Port.  All PCIe transactions are
 * terminated inside the Root Port.
 */
static int pci_quirk_qcom_rp_acs(struct pci_dev *dev, u16 acs_flags)
{
        return pci_acs_ctrl_enabled(acs_flags,
                PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
}

static int pci_quirk_al_acs(struct pci_dev *dev, u16 acs_flags)
{
        if (pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
                return -ENOTTY;

        /*
         * Amazon's Annapurna Labs root ports don't include an ACS capability,
         * but do include ACS-like functionality. The hardware doesn't support
         * peer-to-peer transactions via the root port and each has a unique
         * segment number.
         *
         * Additionally, the root ports cannot send traffic to each other.
         */
        acs_flags &= ~(PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);

        return acs_flags ? 0 : 1;
}

/*
 * Sunrise Point PCH root ports implement ACS, but unfortunately as shown in
 * the datasheet (Intel 100 Series Chipset Family PCH Datasheet, Vol. 2,
 * 12.1.46, 12.1.47)[1] this chipset uses dwords for the ACS capability and
 * control registers whereas the PCIe spec packs them into words (Rev 3.0,
 * 7.16 ACS Extended Capability).  The bit definitions are correct, but the
 * control register is at offset 8 instead of 6 and we should probably use
 * dword accesses to them.  This applies to the following PCI Device IDs, as
 * found in volume 1 of the datasheet[2]:
 *
 * 0xa110-0xa11f Sunrise Point-H PCI Express Root Port #{0-16}
 * 0xa167-0xa16a Sunrise Point-H PCI Express Root Port #{17-20}
 *
 * N.B. This doesn't fix what lspci shows.
 *
 * The 100 series chipset specification update includes this as errata #23[3].
 *
 * The 200 series chipset (Union Point) has the same bug according to the
 * specification update (Intel 200 Series Chipset Family Platform Controller
 * Hub, Specification Update, January 2017, Revision 001, Document# 335194-001,
 * Errata 22)[4].  Per the datasheet[5], root port PCI Device IDs for this
 * chipset include:
 *
 * 0xa290-0xa29f PCI Express Root port #{0-16}
 * 0xa2e7-0xa2ee PCI Express Root port #{17-24}
 *
 * Mobile chipsets are also affected, 7th & 8th Generation
 * Specification update confirms ACS errata 22, status no fix: (7th Generation
 * Intel Processor Family I/O for U/Y Platforms and 8th Generation Intel
 * Processor Family I/O for U Quad Core Platforms Specification Update,
 * August 2017, Revision 002, Document#: 334660-002)[6]
 * Device IDs from I/O datasheet: (7th Generation Intel Processor Family I/O
 * for U/Y Platforms and 8th Generation Intel ® Processor Family I/O for U
 * Quad Core Platforms, Vol 1 of 2, August 2017, Document#: 334658-003)[7]
 *
 * 0x9d10-0x9d1b PCI Express Root port #{1-12}
 *
 * [1] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-2.html
 * [2] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-1.html
 * [3] http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-spec-update.html
 * [4] http://www.intel.com/content/www/us/en/chipsets/200-series-chipset-pch-spec-update.html
 * [5] http://www.intel.com/content/www/us/en/chipsets/200-series-chipset-pch-datasheet-vol-1.html
 * [6] https://www.intel.com/content/www/us/en/processors/core/7th-gen-core-family-mobile-u-y-processor-lines-i-o-spec-update.html
 * [7] https://www.intel.com/content/www/us/en/processors/core/7th-gen-core-family-mobile-u-y-processor-lines-i-o-datasheet-vol-1.html
 */
static bool pci_quirk_intel_spt_pch_acs_match(struct pci_dev *dev)
{
        if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
                return false;

        switch (dev->device) {
        case 0xa110 ... 0xa11f: case 0xa167 ... 0xa16a: /* Sunrise Point */
        case 0xa290 ... 0xa29f: case 0xa2e7 ... 0xa2ee: /* Union Point */
        case 0x9d10 ... 0x9d1b: /* 7th & 8th Gen Mobile */
                return true;
        }

        return false;
}

#define INTEL_SPT_ACS_CTRL (PCI_ACS_CAP + 4)

static int pci_quirk_intel_spt_pch_acs(struct pci_dev *dev, u16 acs_flags)
{
        int pos;
        u32 cap, ctrl;

        if (!pci_quirk_intel_spt_pch_acs_match(dev))
                return -ENOTTY;

        pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
        if (!pos)
                return -ENOTTY;

        /* see pci_acs_flags_enabled() */
        pci_read_config_dword(dev, pos + PCI_ACS_CAP, &cap);
        acs_flags &= (cap | PCI_ACS_EC);

        pci_read_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, &ctrl);

        return pci_acs_ctrl_enabled(acs_flags, ctrl);
}

static int pci_quirk_mf_endpoint_acs(struct pci_dev *dev, u16 acs_flags)
{
        /*
         * SV, TB, and UF are not relevant to multifunction endpoints.
         *
         * Multifunction devices are only required to implement RR, CR, and DT
         * in their ACS capability if they support peer-to-peer transactions.
         * Devices matching this quirk have been verified by the vendor to not
         * perform peer-to-peer with other functions, allowing us to mask out
         * these bits as if they were unimplemented in the ACS capability.
         */
        return pci_acs_ctrl_enabled(acs_flags,
                PCI_ACS_SV | PCI_ACS_TB | PCI_ACS_RR |
                PCI_ACS_CR | PCI_ACS_UF | PCI_ACS_DT);
}

static int pci_quirk_brcm_acs(struct pci_dev *dev, u16 acs_flags)
{
        /*
         * iProc PAXB Root Ports don't advertise an ACS capability, but
         * they do not allow peer-to-peer transactions between Root Ports.
         * Allow each Root Port to be in a separate IOMMU group by masking
         * SV/RR/CR/UF bits.
         */
        return pci_acs_ctrl_enabled(acs_flags,
                PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF);
}

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 },
        { PCI_VENDOR_ID_AMD, 0x780f, pci_quirk_amd_sb_acs },
        { PCI_VENDOR_ID_AMD, 0x7809, pci_quirk_amd_sb_acs },
        { PCI_VENDOR_ID_SOLARFLARE, 0x0903, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_SOLARFLARE, 0x0923, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_SOLARFLARE, 0x0A03, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10C6, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10DB, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10DD, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10E1, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10F1, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10F7, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10F8, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10F9, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10FA, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10FB, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10FC, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1507, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1514, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x151C, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1529, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x152A, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x154D, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x154F, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1551, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1558, pci_quirk_mf_endpoint_acs },
        /* 82580 */
        { PCI_VENDOR_ID_INTEL, 0x1509, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x150E, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x150F, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1510, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1511, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1516, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1527, pci_quirk_mf_endpoint_acs },
        /* 82576 */
        { PCI_VENDOR_ID_INTEL, 0x10C9, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10E6, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10E7, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10E8, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x150A, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x150D, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1518, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1526, pci_quirk_mf_endpoint_acs },
        /* 82575 */
        { PCI_VENDOR_ID_INTEL, 0x10A7, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10A9, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10D6, pci_quirk_mf_endpoint_acs },
        /* I350 */
        { PCI_VENDOR_ID_INTEL, 0x1521, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1522, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1523, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1524, pci_quirk_mf_endpoint_acs },
        /* 82571 (Quads omitted due to non-ACS switch) */
        { PCI_VENDOR_ID_INTEL, 0x105E, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x105F, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x1060, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x10D9, pci_quirk_mf_endpoint_acs },
        /* I219 */
        { PCI_VENDOR_ID_INTEL, 0x15b7, pci_quirk_mf_endpoint_acs },
        { PCI_VENDOR_ID_INTEL, 0x15b8, pci_quirk_mf_endpoint_acs },
        /* QCOM QDF2xxx root ports */
        { PCI_VENDOR_ID_QCOM, 0x0400, pci_quirk_qcom_rp_acs },
        { PCI_VENDOR_ID_QCOM, 0x0401, pci_quirk_qcom_rp_acs },
        /* HXT SD4800 root ports. The ACS design is same as QCOM QDF2xxx */
        { PCI_VENDOR_ID_HXT, 0x0401, pci_quirk_qcom_rp_acs },
        /* Intel PCH root ports */
        { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs },
        { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_spt_pch_acs },
        { 0x19a2, 0x710, pci_quirk_mf_endpoint_acs }, /* Emulex BE3-R */
        { 0x10df, 0x720, pci_quirk_mf_endpoint_acs }, /* Emulex Skyhawk-R */
        /* Cavium ThunderX */
        { PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, pci_quirk_cavium_acs },
        /* APM X-Gene */
        { PCI_VENDOR_ID_AMCC, 0xE004, pci_quirk_xgene_acs },
        /* Ampere Computing */
        { PCI_VENDOR_ID_AMPERE, 0xE005, pci_quirk_xgene_acs },
        { PCI_VENDOR_ID_AMPERE, 0xE006, pci_quirk_xgene_acs },
        { PCI_VENDOR_ID_AMPERE, 0xE007, pci_quirk_xgene_acs },
        { PCI_VENDOR_ID_AMPERE, 0xE008, pci_quirk_xgene_acs },
        { PCI_VENDOR_ID_AMPERE, 0xE009, pci_quirk_xgene_acs },
        { PCI_VENDOR_ID_AMPERE, 0xE00A, pci_quirk_xgene_acs },
        { PCI_VENDOR_ID_AMPERE, 0xE00B, pci_quirk_xgene_acs },
        { PCI_VENDOR_ID_AMPERE, 0xE00C, pci_quirk_xgene_acs },
        { PCI_VENDOR_ID_BROADCOM, 0xD714, pci_quirk_brcm_acs },
        /* Amazon Annapurna Labs */
        { PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, pci_quirk_al_acs },
        { 0 }
};

/*
 * pci_dev_specific_acs_enabled - check whether device provides ACS controls
 * @dev:        PCI device
 * @acs_flags:  Bitmask of desired ACS controls
 *
 * Returns:
 *   -ENOTTY:   No quirk applies to this device; we can't tell whether the
 *              device provides the desired controls
 *   0:         Device does not provide all the desired controls
 *   >0:        Device provides all the controls in @acs_flags
 */
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;
}

/* Config space offset of Root Complex Base Address register */
#define INTEL_LPC_RCBA_REG 0xf0
/* 31:14 RCBA address */
#define INTEL_LPC_RCBA_MASK 0xffffc000
/* RCBA Enable */
#define INTEL_LPC_RCBA_ENABLE (1 << 0)

/* Backbone Scratch Pad Register */
#define INTEL_BSPR_REG 0x1104
/* Backbone Peer Non-Posted Disable */
#define INTEL_BSPR_REG_BPNPD (1 << 8)
/* Backbone Peer Posted Disable */
#define INTEL_BSPR_REG_BPPD  (1 << 9)

/* Upstream Peer Decode Configuration Register */
#define INTEL_UPDCR_REG 0x1014
/* 5:0 Peer Decode Enable bits */
#define INTEL_UPDCR_REG_MASK 0x3f

static int pci_quirk_enable_intel_lpc_acs(struct pci_dev *dev)
{
        u32 rcba, bspr, updcr;
        void __iomem *rcba_mem;

        /*
         * Read the RCBA register from the LPC (D31:F0).  PCH root ports
         * are D28:F* and therefore get probed before LPC, thus we can't
         * use pci_get_slot()/pci_read_config_dword() here.
         */
        pci_bus_read_config_dword(dev->bus, PCI_DEVFN(31, 0),
                                  INTEL_LPC_RCBA_REG, &rcba);
        if (!(rcba & INTEL_LPC_RCBA_ENABLE))
                return -EINVAL;

        rcba_mem = ioremap(rcba & INTEL_LPC_RCBA_MASK,
                                   PAGE_ALIGN(INTEL_UPDCR_REG));
        if (!rcba_mem)
                return -ENOMEM;

        /*
         * The BSPR can disallow peer cycles, but it's set by soft strap and
         * therefore read-only.  If both posted and non-posted peer cycles are
         * disallowed, we're ok.  If either are allowed, then we need to use
         * the UPDCR to disable peer decodes for each port.  This provides the
         * PCIe ACS equivalent of PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF
         */
        bspr = readl(rcba_mem + INTEL_BSPR_REG);
        bspr &= INTEL_BSPR_REG_BPNPD | INTEL_BSPR_REG_BPPD;
        if (bspr != (INTEL_BSPR_REG_BPNPD | INTEL_BSPR_REG_BPPD)) {
                updcr = readl(rcba_mem + INTEL_UPDCR_REG);
                if (updcr & INTEL_UPDCR_REG_MASK) {
                        pci_info(dev, "Disabling UPDCR peer decodes\n");
                        updcr &= ~INTEL_UPDCR_REG_MASK;
                        writel(updcr, rcba_mem + INTEL_UPDCR_REG);
                }
        }

        iounmap(rcba_mem);
        return 0;
}

/* Miscellaneous Port Configuration register */
#define INTEL_MPC_REG 0xd8
/* MPC: Invalid Receive Bus Number Check Enable */
#define INTEL_MPC_REG_IRBNCE (1 << 26)

static void pci_quirk_enable_intel_rp_mpc_acs(struct pci_dev *dev)
{
        u32 mpc;

        /*
         * When enabled, the IRBNCE bit of the MPC register enables the
         * equivalent of PCI ACS Source Validation (PCI_ACS_SV), which
         * ensures that requester IDs fall within the bus number range
         * of the bridge.  Enable if not already.
         */
        pci_read_config_dword(dev, INTEL_MPC_REG, &mpc);
        if (!(mpc & INTEL_MPC_REG_IRBNCE)) {
                pci_info(dev, "Enabling MPC IRBNCE\n");
                mpc |= INTEL_MPC_REG_IRBNCE;
                pci_write_config_word(dev, INTEL_MPC_REG, mpc);
        }
}

static int pci_quirk_enable_intel_pch_acs(struct pci_dev *dev)
{
        if (!pci_quirk_intel_pch_acs_match(dev))
                return -ENOTTY;

        if (pci_quirk_enable_intel_lpc_acs(dev)) {
                pci_warn(dev, "Failed to enable Intel PCH ACS quirk\n");
                return 0;
        }

        pci_quirk_enable_intel_rp_mpc_acs(dev);

        dev->dev_flags |= PCI_DEV_FLAGS_ACS_ENABLED_QUIRK;

        pci_info(dev, "Intel PCH root port ACS workaround enabled\n");

        return 0;
}

static int pci_quirk_enable_intel_spt_pch_acs(struct pci_dev *dev)
{
        int pos;
        u32 cap, ctrl;

        if (!pci_quirk_intel_spt_pch_acs_match(dev))
                return -ENOTTY;

        pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
        if (!pos)
                return -ENOTTY;

        pci_read_config_dword(dev, pos + PCI_ACS_CAP, &cap);
        pci_read_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, &ctrl);

        ctrl |= (cap & PCI_ACS_SV);
        ctrl |= (cap & PCI_ACS_RR);
        ctrl |= (cap & PCI_ACS_CR);
        ctrl |= (cap & PCI_ACS_UF);

        pci_write_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, ctrl);

        pci_info(dev, "Intel SPT PCH root port ACS workaround enabled\n");

        return 0;
}

static int pci_quirk_disable_intel_spt_pch_acs_redir(struct pci_dev *dev)
{
        int pos;
        u32 cap, ctrl;

        if (!pci_quirk_intel_spt_pch_acs_match(dev))
                return -ENOTTY;

        pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
        if (!pos)
                return -ENOTTY;

        pci_read_config_dword(dev, pos + PCI_ACS_CAP, &cap);
        pci_read_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, &ctrl);

        ctrl &= ~(PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_EC);

        pci_write_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, ctrl);

        pci_info(dev, "Intel SPT PCH root port workaround: disabled ACS redirect\n");

        return 0;
}

static const struct pci_dev_acs_ops {
        u16 vendor;
        u16 device;
        int (*enable_acs)(struct pci_dev *dev);
        int (*disable_acs_redir)(struct pci_dev *dev);
} pci_dev_acs_ops[] = {
        { PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
            .enable_acs = pci_quirk_enable_intel_pch_acs,
        },
        { PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
            .enable_acs = pci_quirk_enable_intel_spt_pch_acs,
            .disable_acs_redir = pci_quirk_disable_intel_spt_pch_acs_redir,
        },
};

int pci_dev_specific_enable_acs(struct pci_dev *dev)
{
        const struct pci_dev_acs_ops *p;
        int i, ret;

        for (i = 0; i < ARRAY_SIZE(pci_dev_acs_ops); i++) {
                p = &pci_dev_acs_ops[i];
                if ((p->vendor == dev->vendor ||
                     p->vendor == (u16)PCI_ANY_ID) &&
                    (p->device == dev->device ||
                     p->device == (u16)PCI_ANY_ID) &&
                    p->enable_acs) {
                        ret = p->enable_acs(dev);
                        if (ret >= 0)
                                return ret;
                }
        }

        return -ENOTTY;
}

int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
{
        const struct pci_dev_acs_ops *p;
        int i, ret;

        for (i = 0; i < ARRAY_SIZE(pci_dev_acs_ops); i++) {
                p = &pci_dev_acs_ops[i];
                if ((p->vendor == dev->vendor ||
                     p->vendor == (u16)PCI_ANY_ID) &&
                    (p->device == dev->device ||
                     p->device == (u16)PCI_ANY_ID) &&
                    p->disable_acs_redir) {
                        ret = p->disable_acs_redir(dev);
                        if (ret >= 0)
                                return ret;
                }
        }

        return -ENOTTY;
}

/*
 * The PCI capabilities list for Intel DH895xCC VFs (device ID 0x0443) with
 * QuickAssist Technology (QAT) is prematurely terminated in hardware.  The
 * Next Capability pointer in the MSI Capability Structure should point to
 * the PCIe Capability Structure but is incorrectly hardwired as 0 terminating
 * the list.
 */
static void quirk_intel_qat_vf_cap(struct pci_dev *pdev)
{
        int pos, i = 0;
        u8 next_cap;
        u16 reg16, *cap;
        struct pci_cap_saved_state *state;

        /* Bail if the hardware bug is fixed */
        if (pdev->pcie_cap || pci_find_capability(pdev, PCI_CAP_ID_EXP))
                return;

        /* Bail if MSI Capability Structure is not found for some reason */
        pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
        if (!pos)
                return;

        /*
         * Bail if Next Capability pointer in the MSI Capability Structure
         * is not the expected incorrect 0x00.
         */
        pci_read_config_byte(pdev, pos + 1, &next_cap);
        if (next_cap)
                return;

        /*
         * PCIe Capability Structure is expected to be at 0x50 and should
         * terminate the list (Next Capability pointer is 0x00).  Verify
         * Capability Id and Next Capability pointer is as expected.
         * Open-code some of set_pcie_port_type() and pci_cfg_space_size_ext()
         * to correctly set kernel data structures which have already been
         * set incorrectly due to the hardware bug.
         */
        pos = 0x50;
        pci_read_config_word(pdev, pos, &reg16);
        if (reg16 == (0x0000 | PCI_CAP_ID_EXP)) {
                u32 status;
#ifndef PCI_EXP_SAVE_REGS
#define PCI_EXP_SAVE_REGS     7
#endif
                int size = PCI_EXP_SAVE_REGS * sizeof(u16);

                pdev->pcie_cap = pos;
                pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, &reg16);
                pdev->pcie_flags_reg = reg16;
                pci_read_config_word(pdev, pos + PCI_EXP_DEVCAP, &reg16);
                pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD;

                pdev->cfg_size = PCI_CFG_SPACE_EXP_SIZE;
                if (pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &status) !=
                    PCIBIOS_SUCCESSFUL || (status == 0xffffffff))
                        pdev->cfg_size = PCI_CFG_SPACE_SIZE;

                if (pci_find_saved_cap(pdev, PCI_CAP_ID_EXP))
                        return;

                /* Save PCIe cap */
                state = kzalloc(sizeof(*state) + size, GFP_KERNEL);
                if (!state)
                        return;

                state->cap.cap_nr = PCI_CAP_ID_EXP;
                state->cap.cap_extended = 0;
                state->cap.size = size;
                cap = (u16 *)&state->cap.data[0];
                pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &cap[i++]);
                pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &cap[i++]);
                pcie_capability_read_word(pdev, PCI_EXP_SLTCTL, &cap[i++]);
                pcie_capability_read_word(pdev, PCI_EXP_RTCTL,  &cap[i++]);
                pcie_capability_read_word(pdev, PCI_EXP_DEVCTL2, &cap[i++]);
                pcie_capability_read_word(pdev, PCI_EXP_LNKCTL2, &cap[i++]);
                pcie_capability_read_word(pdev, PCI_EXP_SLTCTL2, &cap[i++]);
                hlist_add_head(&state->next, &pdev->saved_cap_space);
        }
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x443, quirk_intel_qat_vf_cap);

/* FLR may cause some 82579 devices to hang */
static void quirk_intel_no_flr(struct pci_dev *dev)
{
        dev->dev_flags |= PCI_DEV_FLAGS_NO_FLR_RESET;
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1502, quirk_intel_no_flr);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1503, quirk_intel_no_flr);

static void quirk_no_ext_tags(struct pci_dev *pdev)
{
        struct pci_host_bridge *bridge = pci_find_host_bridge(pdev->bus);

        if (!bridge)
                return;

        bridge->no_ext_tags = 1;
        pci_info(pdev, "disabling Extended Tags (this device can't handle them)\n");

        pci_walk_bus(bridge->bus, pci_configure_extended_tags, NULL);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0132, quirk_no_ext_tags);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0140, quirk_no_ext_tags);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0141, quirk_no_ext_tags);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0142, quirk_no_ext_tags);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0144, quirk_no_ext_tags);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0420, quirk_no_ext_tags);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0422, quirk_no_ext_tags);

#ifdef CONFIG_PCI_ATS
/*
 * Some devices require additional driver setup to enable ATS.  Don't use
 * ATS for those devices as ATS will be enabled before the driver has had a
 * chance to load and configure the device.
 */
static void quirk_amd_harvest_no_ats(struct pci_dev *pdev)
{
        if (pdev->device == 0x7340 && pdev->revision != 0xc5)
                return;

        pci_info(pdev, "disabling ATS\n");
        pdev->ats_cap = 0;
}

/* AMD Stoney platform GPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, quirk_amd_harvest_no_ats);
/* AMD Iceland dGPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6900, quirk_amd_harvest_no_ats);
/* AMD Navi14 dGPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7340, quirk_amd_harvest_no_ats);
#endif /* CONFIG_PCI_ATS */

/* Freescale PCIe doesn't support MSI in RC mode */
static void quirk_fsl_no_msi(struct pci_dev *pdev)
{
        if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT)
                pdev->no_msi = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, quirk_fsl_no_msi);

/*
 * Although not allowed by the spec, some multi-function devices have
 * dependencies of one function (consumer) on another (supplier).  For the
 * consumer to work in D0, the supplier must also be in D0.  Create a
 * device link from the consumer to the supplier to enforce this
 * dependency.  Runtime PM is allowed by default on the consumer to prevent
 * it from permanently keeping the supplier awake.
 */
static void pci_create_device_link(struct pci_dev *pdev, unsigned int consumer,
                                   unsigned int supplier, unsigned int class,
                                   unsigned int class_shift)
{
        struct pci_dev *supplier_pdev;

        if (PCI_FUNC(pdev->devfn) != consumer)
                return;

        supplier_pdev = pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),
                                pdev->bus->number,
                                PCI_DEVFN(PCI_SLOT(pdev->devfn), supplier));
        if (!supplier_pdev || (supplier_pdev->class >> class_shift) != class) {
                pci_dev_put(supplier_pdev);
                return;
        }

        if (device_link_add(&pdev->dev, &supplier_pdev->dev,
                            DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME))
                pci_info(pdev, "D0 power state depends on %s\n",
                         pci_name(supplier_pdev));
        else
                pci_err(pdev, "Cannot enforce power dependency on %s\n",
                        pci_name(supplier_pdev));

        pm_runtime_allow(&pdev->dev);
        pci_dev_put(supplier_pdev);
}

/*
 * Create device link for GPUs with integrated HDA controller for streaming
 * audio to attached displays.
 */
static void quirk_gpu_hda(struct pci_dev *hda)
{
        pci_create_device_link(hda, 1, 0, PCI_BASE_CLASS_DISPLAY, 16);
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
                              PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda);
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMD, PCI_ANY_ID,
                              PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda);
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
                              PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda);

/*
 * Create device link for NVIDIA GPU with integrated USB xHCI Host
 * controller to VGA.
 */
static void quirk_gpu_usb(struct pci_dev *usb)
{
        pci_create_device_link(usb, 2, 0, PCI_BASE_CLASS_DISPLAY, 16);
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
                              PCI_CLASS_SERIAL_USB, 8, quirk_gpu_usb);

/*
 * Create device link for NVIDIA GPU with integrated Type-C UCSI controller
 * to VGA. Currently there is no class code defined for UCSI device over PCI
 * so using UNKNOWN class for now and it will be updated when UCSI
 * over PCI gets a class code.
 */
#define PCI_CLASS_SERIAL_UNKNOWN        0x0c80
static void quirk_gpu_usb_typec_ucsi(struct pci_dev *ucsi)
{
        pci_create_device_link(ucsi, 3, 0, PCI_BASE_CLASS_DISPLAY, 16);
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
                              PCI_CLASS_SERIAL_UNKNOWN, 8,
                              quirk_gpu_usb_typec_ucsi);

/*
 * Enable the NVIDIA GPU integrated HDA controller if the BIOS left it
 * disabled.  https://devtalk.nvidia.com/default/topic/1024022
 */
static void quirk_nvidia_hda(struct pci_dev *gpu)
{
        u8 hdr_type;
        u32 val;

        /* There was no integrated HDA controller before MCP89 */
        if (gpu->device < PCI_DEVICE_ID_NVIDIA_GEFORCE_320M)
                return;

        /* Bit 25 at offset 0x488 enables the HDA controller */
        pci_read_config_dword(gpu, 0x488, &val);
        if (val & BIT(25))
                return;

        pci_info(gpu, "Enabling HDA controller\n");
        pci_write_config_dword(gpu, 0x488, val | BIT(25));

        /* The GPU becomes a multi-function device when the HDA is enabled */
        pci_read_config_byte(gpu, PCI_HEADER_TYPE, &hdr_type);
        gpu->multifunction = !!(hdr_type & 0x80);
}
DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
                               PCI_BASE_CLASS_DISPLAY, 16, quirk_nvidia_hda);
DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
                               PCI_BASE_CLASS_DISPLAY, 16, quirk_nvidia_hda);

/*
 * Some IDT switches incorrectly flag an ACS Source Validation error on
 * completions for config read requests even though PCIe r4.0, sec
 * 6.12.1.1, says that completions are never affected by ACS Source
 * Validation.  Here's the text of IDT 89H32H8G3-YC, erratum #36:
 *
 *   Item #36 - Downstream port applies ACS Source Validation to Completions
 *   Section 6.12.1.1 of the PCI Express Base Specification 3.1 states that
 *   completions are never affected by ACS Source Validation.  However,
 *   completions received by a downstream port of the PCIe switch from a
 *   device that has not yet captured a PCIe bus number are incorrectly
 *   dropped by ACS Source Validation by the switch downstream port.
 *
 * The workaround suggested by IDT is to issue a config write to the
 * downstream device before issuing the first config read.  This allows the
 * downstream device to capture its bus and device numbers (see PCIe r4.0,
 * sec 2.2.9), thus avoiding the ACS error on the completion.
 *
 * However, we don't know when the device is ready to accept the config
 * write, so we do config reads until we receive a non-Config Request Retry
 * Status, then do the config write.
 *
 * To avoid hitting the erratum when doing the config reads, we disable ACS
 * SV around this process.
 */
int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *l, int timeout)
{
        int pos;
        u16 ctrl = 0;
        bool found;
        struct pci_dev *bridge = bus->self;

        pos = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ACS);

        /* Disable ACS SV before initial config reads */
        if (pos) {
                pci_read_config_word(bridge, pos + PCI_ACS_CTRL, &ctrl);
                if (ctrl & PCI_ACS_SV)
                        pci_write_config_word(bridge, pos + PCI_ACS_CTRL,
                                              ctrl & ~PCI_ACS_SV);
        }

        found = pci_bus_generic_read_dev_vendor_id(bus, devfn, l, timeout);

        /* Write Vendor ID (read-only) so the endpoint latches its bus/dev */
        if (found)
                pci_bus_write_config_word(bus, devfn, PCI_VENDOR_ID, 0);

        /* Re-enable ACS_SV if it was previously enabled */
        if (ctrl & PCI_ACS_SV)
                pci_write_config_word(bridge, pos + PCI_ACS_CTRL, ctrl);

        return found;
}

/*
 * Microsemi Switchtec NTB uses devfn proxy IDs to move TLPs between
 * NT endpoints via the internal switch fabric. These IDs replace the
 * originating requestor ID TLPs which access host memory on peer NTB
 * ports. Therefore, all proxy IDs must be aliased to the NTB device
 * to permit access when the IOMMU is turned on.
 */
static void quirk_switchtec_ntb_dma_alias(struct pci_dev *pdev)
{
        void __iomem *mmio;
        struct ntb_info_regs __iomem *mmio_ntb;
        struct ntb_ctrl_regs __iomem *mmio_ctrl;
        u64 partition_map;
        u8 partition;
        int pp;

        if (pci_enable_device(pdev)) {
                pci_err(pdev, "Cannot enable Switchtec device\n");
                return;
        }

        mmio = pci_iomap(pdev, 0, 0);
        if (mmio == NULL) {
                pci_disable_device(pdev);
                pci_err(pdev, "Cannot iomap Switchtec device\n");
                return;
        }

        pci_info(pdev, "Setting Switchtec proxy ID aliases\n");

        mmio_ntb = mmio + SWITCHTEC_GAS_NTB_OFFSET;
        mmio_ctrl = (void __iomem *) mmio_ntb + SWITCHTEC_NTB_REG_CTRL_OFFSET;

        partition = ioread8(&mmio_ntb->partition_id);

        partition_map = ioread32(&mmio_ntb->ep_map);
        partition_map |= ((u64) ioread32(&mmio_ntb->ep_map + 4)) << 32;
        partition_map &= ~(1ULL << partition);

        for (pp = 0; pp < (sizeof(partition_map) * 8); pp++) {
                struct ntb_ctrl_regs __iomem *mmio_peer_ctrl;
                u32 table_sz = 0;
                int te;

                if (!(partition_map & (1ULL << pp)))
                        continue;

                pci_dbg(pdev, "Processing partition %d\n", pp);

                mmio_peer_ctrl = &mmio_ctrl[pp];

                table_sz = ioread16(&mmio_peer_ctrl->req_id_table_size);
                if (!table_sz) {
                        pci_warn(pdev, "Partition %d table_sz 0\n", pp);
                        continue;
                }

                if (table_sz > 512) {
                        pci_warn(pdev,
                                 "Invalid Switchtec partition %d table_sz %d\n",
                                 pp, table_sz);
                        continue;
                }

                for (te = 0; te < table_sz; te++) {
                        u32 rid_entry;
                        u8 devfn;

                        rid_entry = ioread32(&mmio_peer_ctrl->req_id_table[te]);
                        devfn = (rid_entry >> 1) & 0xFF;
                        pci_dbg(pdev,
                                "Aliasing Partition %d Proxy ID %02x.%d\n",
                                pp, PCI_SLOT(devfn), PCI_FUNC(devfn));
                        pci_add_dma_alias(pdev, devfn, 1);
                }
        }

        pci_iounmap(pdev, mmio);
        pci_disable_device(pdev);
}
#define SWITCHTEC_QUIRK(vid) \
        DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_MICROSEMI, vid, \
                PCI_CLASS_BRIDGE_OTHER, 8, quirk_switchtec_ntb_dma_alias)

SWITCHTEC_QUIRK(0x8531);  /* PFX 24xG3 */
SWITCHTEC_QUIRK(0x8532);  /* PFX 32xG3 */
SWITCHTEC_QUIRK(0x8533);  /* PFX 48xG3 */
SWITCHTEC_QUIRK(0x8534);  /* PFX 64xG3 */
SWITCHTEC_QUIRK(0x8535);  /* PFX 80xG3 */
SWITCHTEC_QUIRK(0x8536);  /* PFX 96xG3 */
SWITCHTEC_QUIRK(0x8541);  /* PSX 24xG3 */
SWITCHTEC_QUIRK(0x8542);  /* PSX 32xG3 */
SWITCHTEC_QUIRK(0x8543);  /* PSX 48xG3 */
SWITCHTEC_QUIRK(0x8544);  /* PSX 64xG3 */
SWITCHTEC_QUIRK(0x8545);  /* PSX 80xG3 */
SWITCHTEC_QUIRK(0x8546);  /* PSX 96xG3 */
SWITCHTEC_QUIRK(0x8551);  /* PAX 24XG3 */
SWITCHTEC_QUIRK(0x8552);  /* PAX 32XG3 */
SWITCHTEC_QUIRK(0x8553);  /* PAX 48XG3 */
SWITCHTEC_QUIRK(0x8554);  /* PAX 64XG3 */
SWITCHTEC_QUIRK(0x8555);  /* PAX 80XG3 */
SWITCHTEC_QUIRK(0x8556);  /* PAX 96XG3 */
SWITCHTEC_QUIRK(0x8561);  /* PFXL 24XG3 */
SWITCHTEC_QUIRK(0x8562);  /* PFXL 32XG3 */
SWITCHTEC_QUIRK(0x8563);  /* PFXL 48XG3 */
SWITCHTEC_QUIRK(0x8564);  /* PFXL 64XG3 */
SWITCHTEC_QUIRK(0x8565);  /* PFXL 80XG3 */
SWITCHTEC_QUIRK(0x8566);  /* PFXL 96XG3 */
SWITCHTEC_QUIRK(0x8571);  /* PFXI 24XG3 */
SWITCHTEC_QUIRK(0x8572);  /* PFXI 32XG3 */
SWITCHTEC_QUIRK(0x8573);  /* PFXI 48XG3 */
SWITCHTEC_QUIRK(0x8574);  /* PFXI 64XG3 */
SWITCHTEC_QUIRK(0x8575);  /* PFXI 80XG3 */
SWITCHTEC_QUIRK(0x8576);  /* PFXI 96XG3 */
SWITCHTEC_QUIRK(0x4000);  /* PFX 100XG4 */
SWITCHTEC_QUIRK(0x4084);  /* PFX 84XG4  */
SWITCHTEC_QUIRK(0x4068);  /* PFX 68XG4  */
SWITCHTEC_QUIRK(0x4052);  /* PFX 52XG4  */
SWITCHTEC_QUIRK(0x4036);  /* PFX 36XG4  */
SWITCHTEC_QUIRK(0x4028);  /* PFX 28XG4  */
SWITCHTEC_QUIRK(0x4100);  /* PSX 100XG4 */
SWITCHTEC_QUIRK(0x4184);  /* PSX 84XG4  */
SWITCHTEC_QUIRK(0x4168);  /* PSX 68XG4  */
SWITCHTEC_QUIRK(0x4152);  /* PSX 52XG4  */
SWITCHTEC_QUIRK(0x4136);  /* PSX 36XG4  */
SWITCHTEC_QUIRK(0x4128);  /* PSX 28XG4  */
SWITCHTEC_QUIRK(0x4200);  /* PAX 100XG4 */
SWITCHTEC_QUIRK(0x4284);  /* PAX 84XG4  */
SWITCHTEC_QUIRK(0x4268);  /* PAX 68XG4  */
SWITCHTEC_QUIRK(0x4252);  /* PAX 52XG4  */
SWITCHTEC_QUIRK(0x4236);  /* PAX 36XG4  */
SWITCHTEC_QUIRK(0x4228);  /* PAX 28XG4  */

/*
 * The PLX NTB uses devfn proxy IDs to move TLPs between NT endpoints.
 * These IDs are used to forward responses to the originator on the other
 * side of the NTB.  Alias all possible IDs to the NTB to permit access when
 * the IOMMU is turned on.
 */
static void quirk_plx_ntb_dma_alias(struct pci_dev *pdev)
{
        pci_info(pdev, "Setting PLX NTB proxy ID aliases\n");
        /* PLX NTB may use all 256 devfns */
        pci_add_dma_alias(pdev, 0, 256);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PLX, 0x87b0, quirk_plx_ntb_dma_alias);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PLX, 0x87b1, quirk_plx_ntb_dma_alias);

/*
 * On Lenovo Thinkpad P50 SKUs with a Nvidia Quadro M1000M, the BIOS does
 * not always reset the secondary Nvidia GPU between reboots if the system
 * is configured to use Hybrid Graphics mode.  This results in the GPU
 * being left in whatever state it was in during the *previous* boot, which
 * causes spurious interrupts from the GPU, which in turn causes us to
 * disable the wrong IRQ and end up breaking the touchpad.  Unsurprisingly,
 * this also completely breaks nouveau.
 *
 * Luckily, it seems a simple reset of the Nvidia GPU brings it back to a
 * clean state and fixes all these issues.
 *
 * When the machine is configured in Dedicated display mode, the issue
 * doesn't occur.  Fortunately the GPU advertises NoReset+ when in this
 * mode, so we can detect that and avoid resetting it.
 */
static void quirk_reset_lenovo_thinkpad_p50_nvgpu(struct pci_dev *pdev)
{
        void __iomem *map;
        int ret;

        if (pdev->subsystem_vendor != PCI_VENDOR_ID_LENOVO ||
            pdev->subsystem_device != 0x222e ||
            !pdev->reset_fn)
                return;

        if (pci_enable_device_mem(pdev))
                return;

        /*
         * Based on nvkm_device_ctor() in
         * drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
         */
        map = pci_iomap(pdev, 0, 0x23000);
        if (!map) {
                pci_err(pdev, "Can't map MMIO space\n");
                goto out_disable;
        }

        /*
         * Make sure the GPU looks like it's been POSTed before resetting
         * it.
         */
        if (ioread32(map + 0x2240c) & 0x2) {
                pci_info(pdev, FW_BUG "GPU left initialized by EFI, resetting\n");
                ret = pci_reset_bus(pdev);
                if (ret < 0)
                        pci_err(pdev, "Failed to reset GPU: %d\n", ret);
        }

        iounmap(map);
out_disable:
        pci_disable_device(pdev);
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1,
                              PCI_CLASS_DISPLAY_VGA, 8,
                              quirk_reset_lenovo_thinkpad_p50_nvgpu);