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quirks.c
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// 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 <[email protected]>
*
* Init/reset quirks for USB host controllers should be in the USB quirks
* file, where their drivers can use them.
*/
#include <linux/aer.h>
#include <linux/align.h>
#include <linux/bitfield.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/pci.h>
#include <linux/isa-dma.h> /* isa_dma_bridge_buggy */
#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/sizes.h>
#include <linux/suspend.h>
#include <linux/switchtec.h>
#include "pci.h"
static bool pcie_lbms_seen(struct pci_dev *dev, u16 lnksta)
{
unsigned long count;
int ret;
ret = pcie_lbms_count(dev, &count);
if (ret < 0)
return lnksta & PCI_EXP_LNKSTA_LBMS;
return count > 0;
}
/*
* Retrain the link of a downstream PCIe port by hand if necessary.
*
* This is needed at least where a downstream port of the ASMedia ASM2824
* Gen 3 switch is wired to the upstream port of the Pericom PI7C9X2G304
* Gen 2 switch, and observed with the Delock Riser Card PCI Express x1 >
* 2 x PCIe x1 device, P/N 41433, plugged into the SiFive HiFive Unmatched
* board.
*
* In such a configuration the switches are supposed to negotiate the link
* speed of preferably 5.0GT/s, falling back to 2.5GT/s. However the link
* continues switching between the two speeds indefinitely and the data
* link layer never reaches the active state, with link training reported
* repeatedly active ~84% of the time. Forcing the target link speed to
* 2.5GT/s with the upstream ASM2824 device makes the two switches talk to
* each other correctly however. And more interestingly retraining with a
* higher target link speed afterwards lets the two successfully negotiate
* 5.0GT/s.
*
* With the ASM2824 we can rely on the otherwise optional Data Link Layer
* Link Active status bit and in the failed link training scenario it will
* be off along with the Link Bandwidth Management Status indicating that
* hardware has changed the link speed or width in an attempt to correct
* unreliable link operation. For a port that has been left unconnected
* both bits will be clear. So use this information to detect the problem
* rather than polling the Link Training bit and watching out for flips or
* at least the active status.
*
* Since the exact nature of the problem isn't known and in principle this
* could trigger where an ASM2824 device is downstream rather upstream,
* apply this erratum workaround to any downstream ports as long as they
* support Link Active reporting and have the Link Control 2 register.
* Restrict the speed to 2.5GT/s then with the Target Link Speed field,
* request a retrain and check the result.
*
* If this turns out successful and we know by the Vendor:Device ID it is
* safe to do so, then lift the restriction, letting the devices negotiate
* a higher speed. Also check for a similar 2.5GT/s speed restriction the
* firmware may have already arranged and lift it with ports that already
* report their data link being up.
*
* Otherwise revert the speed to the original setting and request a retrain
* again to remove any residual state, ignoring the result as it's supposed
* to fail anyway.
*
* Return 0 if the link has been successfully retrained. Return an error
* if retraining was not needed or we attempted a retrain and it failed.
*/
int pcie_failed_link_retrain(struct pci_dev *dev)
{
static const struct pci_device_id ids[] = {
{ PCI_VDEVICE(ASMEDIA, 0x2824) }, /* ASMedia ASM2824 */
{}
};
u16 lnksta, lnkctl2;
int ret = -ENOTTY;
if (!pci_is_pcie(dev) || !pcie_downstream_port(dev) ||
!pcie_cap_has_lnkctl2(dev) || !dev->link_active_reporting)
return ret;
pcie_capability_read_word(dev, PCI_EXP_LNKCTL2, &lnkctl2);
pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnksta);
if (!(lnksta & PCI_EXP_LNKSTA_DLLLA) && pcie_lbms_seen(dev, lnksta)) {
u16 oldlnkctl2 = lnkctl2;
pci_info(dev, "broken device, retraining non-functional downstream link at 2.5GT/s\n");
ret = pcie_set_target_speed(dev, PCIE_SPEED_2_5GT, false);
if (ret) {
pci_info(dev, "retraining failed\n");
pcie_set_target_speed(dev, PCIE_LNKCTL2_TLS2SPEED(oldlnkctl2),
true);
return ret;
}
pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnksta);
}
if ((lnksta & PCI_EXP_LNKSTA_DLLLA) &&
(lnkctl2 & PCI_EXP_LNKCTL2_TLS) == PCI_EXP_LNKCTL2_TLS_2_5GT &&
pci_match_id(ids, dev)) {
u32 lnkcap;
pci_info(dev, "removing 2.5GT/s downstream link speed restriction\n");
pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnkcap);
ret = pcie_set_target_speed(dev, PCIE_LNKCAP_SLS2SPEED(lnkcap), false);
if (ret) {
pci_info(dev, "retraining failed\n");
return ret;
}
}
return ret;
}
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. Disable
* parity error reporting.
*/
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR, pci_disable_parity);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR_BRIDGE, pci_disable_parity);
/*
* 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);
#ifdef CONFIG_X86_32
/*
* 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);
#endif
#ifdef CONFIG_HAS_IOPORT
/*
* Intel NM10 "Tiger Point" 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 "Tiger Point 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);
#endif
/* 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];
const char *r_name = pci_resource_name(dev, i);
if (r->flags & IORESOURCE_MEM && resource_size(r) < PAGE_SIZE) {
resource_set_range(r, 0, PAGE_SIZE);
r->flags |= IORESOURCE_UNSET;
pci_info(dev, "%s %pR: expanded to page size\n",
r_name, 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 (!IS_ALIGNED(r->start, SZ_64M) || resource_size(r) != SZ_64M) {
r->flags |= IORESOURCE_UNSET;
resource_set_range(r, 0, SZ_64M);
}
}
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 int size,
const char *name)
{
u32 region;
struct pci_bus_region bus_region;
struct resource *res = pci_resource_n(dev, pos);
const char *res_name = pci_resource_name(dev, pos);
pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + (pos << 2), ®ion);
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 %pR: %s quirk\n", res_name, res, name);
}
/*
* 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 int size, int nr, const char *name)
{
u16 region;
struct pci_bus_region bus_region;
struct resource *res = pci_resource_n(dev, nr);
pci_read_config_word(dev, port, ®ion);
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);
/*
* "res" is typically a bridge window resource that's not being
* used for a bridge window, so it's just a place to stash this
* non-standard resource. Printing "nr" or pci_resource_name() of
* it doesn't really make sense.
*/
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. The same applies on the VanGogh platform device ([1022:163a]).
*
* 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_dwc_class(struct pci_dev *pdev)
{
u32 class = pdev->class;
if (class != PCI_CLASS_SERIAL_USB_DEVICE) {
/* 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_dwc_class);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VANGOGH_USB,
quirk_amd_dwc_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 int 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 int 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 int 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 int 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);