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kernel/arch/x86/pci/fixup.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Exceptions for specific devices. Usually work-arounds for fatal design flaws.
*/
#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/pci.h>
#include <linux/vgaarb.h>
#include <asm/hpet.h>
#include <asm/pci_x86.h>
static void pci_fixup_i450nx(struct pci_dev *d)
{
/*
* i450NX -- Find and scan all secondary buses on all PXB's.
*/
int pxb, reg;
u8 busno, suba, subb;
dev_warn(&d->dev, "Searching for i450NX host bridges\n");
reg = 0xd0;
for(pxb = 0; pxb < 2; pxb++) {
pci_read_config_byte(d, reg++, &busno);
pci_read_config_byte(d, reg++, &suba);
pci_read_config_byte(d, reg++, &subb);
dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno,
suba, subb);
if (busno)
pcibios_scan_root(busno); /* Bus A */
if (suba < subb)
pcibios_scan_root(suba+1); /* Bus B */
}
pcibios_last_bus = -1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
static void pci_fixup_i450gx(struct pci_dev *d)
{
/*
* i450GX and i450KX -- Find and scan all secondary buses.
* (called separately for each PCI bridge found)
*/
u8 busno;
pci_read_config_byte(d, 0x4a, &busno);
dev_info(&d->dev, "i440KX/GX host bridge; secondary bus %02x\n", busno);
pcibios_scan_root(busno);
pcibios_last_bus = -1;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx);
static void pci_fixup_umc_ide(struct pci_dev *d)
{
/*
* UM8886BF IDE controller sets region type bits incorrectly,
* therefore they look like memory despite of them being I/O.
*/
int i;
dev_warn(&d->dev, "Fixing base address flags\n");
for(i = 0; i < 4; i++)
d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide);
static void pci_fixup_latency(struct pci_dev *d)
{
/*
* SiS 5597 and 5598 chipsets require latency timer set to
* at most 32 to avoid lockups.
*/
dev_dbg(&d->dev, "Setting max latency to 32\n");
pcibios_max_latency = 32;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
static void pci_fixup_piix4_acpi(struct pci_dev *d)
{
/*
* PIIX4 ACPI device: hardwired IRQ9
*/
d->irq = 9;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
/*
* Addresses issues with problems in the memory write queue timer in
* certain VIA Northbridges. This bugfix is per VIA's specifications,
* except for the KL133/KM133: clearing bit 5 on those Northbridges seems
* to trigger a bug in its integrated ProSavage video card, which
* causes screen corruption. We only clear bits 6 and 7 for that chipset,
* until VIA can provide us with definitive information on why screen
* corruption occurs, and what exactly those bits do.
*
* VIA 8363,8622,8361 Northbridges:
* - bits 5, 6, 7 at offset 0x55 need to be turned off
* VIA 8367 (KT266x) Northbridges:
* - bits 5, 6, 7 at offset 0x95 need to be turned off
* VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
* - bits 6, 7 at offset 0x55 need to be turned off
*/
#define VIA_8363_KL133_REVISION_ID 0x81
#define VIA_8363_KM133_REVISION_ID 0x84
static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
{
u8 v;
int where = 0x55;
int mask = 0x1f; /* clear bits 5, 6, 7 by default */
if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
/* fix pci bus latency issues resulted by NB bios error
it appears on bug free^Wreduced kt266x's bios forces
NB latency to zero */
pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
where = 0x95; /* the memory write queue timer register is
different for the KT266x's: 0x95 not 0x55 */
} else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
(d->revision == VIA_8363_KL133_REVISION_ID ||
d->revision == VIA_8363_KM133_REVISION_ID)) {
mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
causes screen corruption on the KL133/KM133 */
}
pci_read_config_byte(d, where, &v);
if (v & ~mask) {
dev_warn(&d->dev, "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
d->device, d->revision, where, v, mask, v & mask);
v &= mask;
pci_write_config_byte(d, where, v);
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
/*
* For some reasons Intel decided that certain parts of their
* 815, 845 and some other chipsets must look like PCI-to-PCI bridges
* while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
* BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
* to Intel terminology. These devices do forward all addresses from
* system to PCI bus no matter what are their window settings, so they are
* "transparent" (or subtractive decoding) from programmers point of view.
*/
static void pci_fixup_transparent_bridge(struct pci_dev *dev)
{
if ((dev->device & 0xff00) == 0x2400)
dev->transparent = 1;
}
DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
PCI_CLASS_BRIDGE_PCI, 8, pci_fixup_transparent_bridge);
/*
* Fixup for C1 Halt Disconnect problem on nForce2 systems.
*
* From information provided by "Allen Martin" <AMartin@nvidia.com>:
*
* A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
* sequence. Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
* This allows the state-machine and timer to return to a proper state within
* 80 ns of the CONNECT and probe appearing together. Since the CPU will not
* issue another HALT within 80 ns of the initial HALT, the failure condition
* is avoided.
*/
static void pci_fixup_nforce2(struct pci_dev *dev)
{
u32 val;
/*
* Chip Old value New value
* C17 0x1F0FFF01 0x1F01FF01
* C18D 0x9F0FFF01 0x9F01FF01
*
* Northbridge chip version may be determined by
* reading the PCI revision ID (0xC1 or greater is C18D).
*/
pci_read_config_dword(dev, 0x6c, &val);
/*
* Apply fixup if needed, but don't touch disconnect state
*/
if ((val & 0x00FF0000) != 0x00010000) {
dev_warn(&dev->dev, "nForce2 C1 Halt Disconnect fixup\n");
pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
/* Max PCI Express root ports */
#define MAX_PCIEROOT 6
static int quirk_aspm_offset[MAX_PCIEROOT << 3];
#define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
{
return raw_pci_read(pci_domain_nr(bus), bus->number,
devfn, where, size, value);
}
/*
* Replace the original pci bus ops for write with a new one that will filter
* the request to insure ASPM cannot be enabled.
*/
static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
{
u8 offset;
offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
if ((offset) && (where == offset))
value = value & ~PCI_EXP_LNKCTL_ASPMC;
return raw_pci_write(pci_domain_nr(bus), bus->number,
devfn, where, size, value);
}
static struct pci_ops quirk_pcie_aspm_ops = {
.read = quirk_pcie_aspm_read,
.write = quirk_pcie_aspm_write,
};
/*
* Prevents PCI Express ASPM (Active State Power Management) being enabled.
*
* Save the register offset, where the ASPM control bits are located,
* for each PCI Express device that is in the device list of
* the root port in an array for fast indexing. Replace the bus ops
* with the modified one.
*/
static void pcie_rootport_aspm_quirk(struct pci_dev *pdev)
{
int i;
struct pci_bus *pbus;
struct pci_dev *dev;
if ((pbus = pdev->subordinate) == NULL)
return;
/*
* Check if the DID of pdev matches one of the six root ports. This
* check is needed in the case this function is called directly by the
* hot-plug driver.
*/
if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) ||
(pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1))
return;
if (list_empty(&pbus->devices)) {
/*
* If no device is attached to the root port at power-up or
* after hot-remove, the pbus->devices is empty and this code
* will set the offsets to zero and the bus ops to parent's bus
* ops, which is unmodified.
*/
for (i = GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i)
quirk_aspm_offset[i] = 0;
pci_bus_set_ops(pbus, pbus->parent->ops);
} else {
/*
* If devices are attached to the root port at power-up or
* after hot-add, the code loops through the device list of
* each root port to save the register offsets and replace the
* bus ops.
*/
list_for_each_entry(dev, &pbus->devices, bus_list)
/* There are 0 to 8 devices attached to this bus */
quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] =
dev->pcie_cap + PCI_EXP_LNKCTL;
pci_bus_set_ops(pbus, &quirk_pcie_aspm_ops);
dev_info(&pbus->dev, "writes to ASPM control bits will be ignored\n");
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA, pcie_rootport_aspm_quirk);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA1, pcie_rootport_aspm_quirk);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB, pcie_rootport_aspm_quirk);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB1, pcie_rootport_aspm_quirk);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC, pcie_rootport_aspm_quirk);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk);
/*
* Fixup to mark boot BIOS video selected by BIOS before it changes
*
* From information provided by "Jon Smirl" <jonsmirl@gmail.com>
*
* The standard boot ROM sequence for an x86 machine uses the BIOS
* to select an initial video card for boot display. This boot video
* card will have its BIOS copied to 0xC0000 in system RAM.
* IORESOURCE_ROM_SHADOW is used to associate the boot video
* card with this copy. On laptops this copy has to be used since
* the main ROM may be compressed or combined with another image.
* See pci_map_rom() for use of this flag. Before marking the device
* with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set
* by either arch code or vga-arbitration; if so only apply the fixup to this
* already-determined primary video card.
*/
static void pci_fixup_video(struct pci_dev *pdev)
{
struct pci_dev *bridge;
struct pci_bus *bus;
u16 config;
struct resource *res;
/* Is VGA routed to us? */
bus = pdev->bus;
while (bus) {
bridge = bus->self;
/*
* From information provided by
* "David Miller" <davem@davemloft.net>
* The bridge control register is valid for PCI header
* type BRIDGE, or CARDBUS. Host to PCI controllers use
* PCI header type NORMAL.
*/
if (bridge && (pci_is_bridge(bridge))) {
pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
&config);
if (!(config & PCI_BRIDGE_CTL_VGA))
return;
}
bus = bus->parent;
}
if (!vga_default_device() || pdev == vga_default_device()) {
pci_read_config_word(pdev, PCI_COMMAND, &config);
if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
res = &pdev->resource[PCI_ROM_RESOURCE];
pci_disable_rom(pdev);
if (res->parent)
release_resource(res);
res->start = 0xC0000;
res->end = res->start + 0x20000 - 1;
res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
IORESOURCE_PCI_FIXED;
dev_info(&pdev->dev, "Video device with shadowed ROM at %pR\n",
res);
}
}
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video);
static const struct dmi_system_id msi_k8t_dmi_table[] = {
{
.ident = "MSI-K8T-Neo2Fir",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
DMI_MATCH(DMI_PRODUCT_NAME, "MS-6702E"),
},
},
{}
};
/*
* The AMD-Athlon64 board MSI "K8T Neo2-FIR" disables the onboard sound
* card if a PCI-soundcard is added.
*
* The BIOS only gives options "DISABLED" and "AUTO". This code sets
* the corresponding register-value to enable the soundcard.
*
* The soundcard is only enabled, if the mainborad is identified
* via DMI-tables and the soundcard is detected to be off.
*/
static void pci_fixup_msi_k8t_onboard_sound(struct pci_dev *dev)
{
unsigned char val;
if (!dmi_check_system(msi_k8t_dmi_table))
return; /* only applies to MSI K8T Neo2-FIR */
pci_read_config_byte(dev, 0x50, &val);
if (val & 0x40) {
pci_write_config_byte(dev, 0x50, val & (~0x40));
/* verify the change for status output */
pci_read_config_byte(dev, 0x50, &val);
if (val & 0x40)
dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
"can't enable onboard soundcard!\n");
else
dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
"enabled onboard soundcard\n");
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
pci_fixup_msi_k8t_onboard_sound);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
pci_fixup_msi_k8t_onboard_sound);
/*
* Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
*
* We pretend to bring them out of full D3 state, and restore the proper
* IRQ, PCI cache line size, and BARs, otherwise the device won't function
* properly. In some cases, the device will generate an interrupt on
* the wrong IRQ line, causing any devices sharing the line it's
* *supposed* to use to be disabled by the kernel's IRQ debug code.
*/
static u16 toshiba_line_size;
static const struct dmi_system_id toshiba_ohci1394_dmi_table[] = {
{
.ident = "Toshiba PS5 based laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
},
},
{
.ident = "Toshiba PSM4 based laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
},
},
{
.ident = "Toshiba A40 based laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"),
},
},
{ }
};
static void pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
{
if (!dmi_check_system(toshiba_ohci1394_dmi_table))
return; /* only applies to certain Toshibas (so far) */
dev->current_state = PCI_D3cold;
pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
pci_pre_fixup_toshiba_ohci1394);
static void pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
{
if (!dmi_check_system(toshiba_ohci1394_dmi_table))
return; /* only applies to certain Toshibas (so far) */
/* Restore config space on Toshiba laptops */
pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
pci_resource_start(dev, 0));
pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
pci_resource_start(dev, 1));
}
DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
pci_post_fixup_toshiba_ohci1394);
/*
* Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
* configuration space.
*/
static void pci_early_fixup_cyrix_5530(struct pci_dev *dev)
{
u8 r;
/* clear 'F4 Video Configuration Trap' bit */
pci_read_config_byte(dev, 0x42, &r);
r &= 0xfd;
pci_write_config_byte(dev, 0x42, r);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
pci_early_fixup_cyrix_5530);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
pci_early_fixup_cyrix_5530);
/*
* Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller:
* prevent update of the BAR0, which doesn't look like a normal BAR.
*/
static void pci_siemens_interrupt_controller(struct pci_dev *dev)
{
dev->resource[0].flags |= IORESOURCE_PCI_FIXED;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
pci_siemens_interrupt_controller);
/*
* SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
* confusing the PCI engine:
*/
static void sb600_disable_hpet_bar(struct pci_dev *dev)
{
u8 val;
/*
* The SB600 and SB700 both share the same device
* ID, but the PM register 0x55 does something different
* for the SB700, so make sure we are dealing with the
* SB600 before touching the bit:
*/
pci_read_config_byte(dev, 0x08, &val);
if (val < 0x2F) {
outb(0x55, 0xCD6);
val = inb(0xCD7);
/* Set bit 7 in PM register 0x55 */
outb(0x55, 0xCD6);
outb(val | 0x80, 0xCD7);
}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);
#ifdef CONFIG_HPET_TIMER
static void sb600_hpet_quirk(struct pci_dev *dev)
{
struct resource *r = &dev->resource[1];
if (r->flags & IORESOURCE_MEM && r->start == hpet_address) {
r->flags |= IORESOURCE_PCI_FIXED;
dev_info(&dev->dev, "reg 0x14 contains HPET; making it immovable\n");
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, 0x4385, sb600_hpet_quirk);
#endif
/*
* Twinhead H12Y needs us to block out a region otherwise we map devices
* there and any access kills the box.
*
* See: https://bugzilla.kernel.org/show_bug.cgi?id=10231
*
* Match off the LPC and svid/sdid (older kernels lose the bridge subvendor)
*/
static void twinhead_reserve_killing_zone(struct pci_dev *dev)
{
if (dev->subsystem_vendor == 0x14FF && dev->subsystem_device == 0xA003) {
pr_info("Reserving memory on Twinhead H12Y\n");
request_mem_region(0xFFB00000, 0x100000, "twinhead");
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone);
/*
* Device [8086:2fc0]
* Erratum HSE43
* CONFIG_TDP_NOMINAL CSR Implemented at Incorrect Offset
* https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v3-spec-update.html
*
* Devices [8086:6f60,6fa0,6fc0]
* Erratum BDF2
* PCI BARs in the Home Agent Will Return Non-Zero Values During Enumeration
* https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v4-spec-update.html
*/
static void pci_invalid_bar(struct pci_dev *dev)
{
dev->non_compliant_bars = 1;
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2fc0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6f60, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa1ec, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa1ed, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa26c, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa26d, pci_invalid_bar);
/*
* Device [1022:7808]
* 23. USB Wake on Connect/Disconnect with Low Speed Devices
* https://support.amd.com/TechDocs/46837.pdf
* Appendix A2
* https://support.amd.com/TechDocs/42413.pdf
*/
static void pci_fixup_amd_ehci_pme(struct pci_dev *dev)
{
dev_info(&dev->dev, "PME# does not work under D3, disabling it\n");
dev->pme_support &= ~((PCI_PM_CAP_PME_D3 | PCI_PM_CAP_PME_D3cold)
>> PCI_PM_CAP_PME_SHIFT);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7808, pci_fixup_amd_ehci_pme);
/*
* Device [1022:7914]
* When in D0, PME# doesn't get asserted when plugging USB 2.0 device.
*/
static void pci_fixup_amd_fch_xhci_pme(struct pci_dev *dev)
{
dev_info(&dev->dev, "PME# does not work under D0, disabling it\n");
dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7914, pci_fixup_amd_fch_xhci_pme);
/*
* Apple MacBook Pro: Avoid [mem 0x7fa00000-0x7fbfffff]
*
* Using the [mem 0x7fa00000-0x7fbfffff] region, e.g., by assigning it to
* the 00:1c.0 Root Port, causes a conflict with [io 0x1804], which is used
* for soft poweroff and suspend-to-RAM.
*
* As far as we know, this is related to the address space, not to the Root
* Port itself. Attaching the quirk to the Root Port is a convenience, but
* it could probably also be a standalone DMI quirk.
*
* https://bugzilla.kernel.org/show_bug.cgi?id=103211
*/
static void quirk_apple_mbp_poweroff(struct pci_dev *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
if ((!dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,4") &&
!dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,5")) ||
pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x1c, 0))
return;
res = request_mem_region(0x7fa00000, 0x200000,
"MacBook Pro poweroff workaround");
if (res)
dev_info(dev, "claimed %s %pR\n", res->name, res);
else
dev_info(dev, "can't work around MacBook Pro poweroff issue\n");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x8c10, quirk_apple_mbp_poweroff);
/*
* VMD-enabled root ports will change the source ID for all messages
* to the VMD device. Rather than doing device matching with the source
* ID, the AER driver should traverse the child device tree, reading
* AER registers to find the faulting device.
*/
static void quirk_no_aersid(struct pci_dev *pdev)
{
/* VMD Domain */
if (is_vmd(pdev->bus) && pci_is_root_bus(pdev->bus))
pdev->bus->bus_flags |= PCI_BUS_FLAGS_NO_AERSID;
}
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
PCI_CLASS_BRIDGE_PCI, 8, quirk_no_aersid);
static void quirk_intel_th_dnv(struct pci_dev *dev)
{
struct resource *r = &dev->resource[4];
/*
* Denverton reports 2k of RTIT_BAR (intel_th resource 4), which
* appears to be 4 MB in reality.
*/
if (r->end == r->start + 0x7ff) {
r->start = 0;
r->end = 0x3fffff;
r->flags |= IORESOURCE_UNSET;
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x19e1, quirk_intel_th_dnv);
#ifdef CONFIG_PHYS_ADDR_T_64BIT
#define AMD_141b_MMIO_BASE(x) (0x80 + (x) * 0x8)
#define AMD_141b_MMIO_BASE_RE_MASK BIT(0)
#define AMD_141b_MMIO_BASE_WE_MASK BIT(1)
#define AMD_141b_MMIO_BASE_MMIOBASE_MASK GENMASK(31,8)
#define AMD_141b_MMIO_LIMIT(x) (0x84 + (x) * 0x8)
#define AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK GENMASK(31,8)
#define AMD_141b_MMIO_HIGH(x) (0x180 + (x) * 0x4)
#define AMD_141b_MMIO_HIGH_MMIOBASE_MASK GENMASK(7,0)
#define AMD_141b_MMIO_HIGH_MMIOLIMIT_SHIFT 16
#define AMD_141b_MMIO_HIGH_MMIOLIMIT_MASK GENMASK(23,16)
/*
* The PCI Firmware Spec, rev 3.2, notes that ACPI should optionally allow
* configuring host bridge windows using the _PRS and _SRS methods.
*
* But this is rarely implemented, so we manually enable a large 64bit BAR for
* PCIe device on AMD Family 15h (Models 00h-1fh, 30h-3fh, 60h-7fh) Processors
* here.
*/
static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
{
static const char *name = "PCI Bus 0000:00";
struct resource *res, *conflict;
u32 base, limit, high;
struct pci_dev *other;
unsigned i;
if (!(pci_probe & PCI_BIG_ROOT_WINDOW))
return;
/* Check that we are the only device of that type */
other = pci_get_device(dev->vendor, dev->device, NULL);
if (other != dev ||
(other = pci_get_device(dev->vendor, dev->device, other))) {
/* This is a multi-socket system, don't touch it for now */
pci_dev_put(other);
return;
}
for (i = 0; i < 8; i++) {
pci_read_config_dword(dev, AMD_141b_MMIO_BASE(i), &base);
pci_read_config_dword(dev, AMD_141b_MMIO_HIGH(i), &high);
/* Is this slot free? */
if (!(base & (AMD_141b_MMIO_BASE_RE_MASK |
AMD_141b_MMIO_BASE_WE_MASK)))
break;
base >>= 8;
base |= high << 24;
/* Abort if a slot already configures a 64bit BAR. */
if (base > 0x10000)
return;
}
if (i == 8)
return;
res = kzalloc(sizeof(*res), GFP_KERNEL);
if (!res)
return;
/*
* Allocate a 256GB window directly below the 0xfd00000000 hardware
* limit (see AMD Family 15h Models 30h-3Fh BKDG, sec 2.4.6).
*/
res->name = name;
res->flags = IORESOURCE_PREFETCH | IORESOURCE_MEM |
IORESOURCE_MEM_64 | IORESOURCE_WINDOW;
res->start = 0xbd00000000ull;
res->end = 0xfd00000000ull - 1;
conflict = request_resource_conflict(&iomem_resource, res);
if (conflict) {
kfree(res);
if (conflict->name != name)
return;
/* We are resuming from suspend; just reenable the window */
res = conflict;
} else {
dev_info(&dev->dev, "adding root bus resource %pR (tainting kernel)\n",
res);
add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
pci_bus_add_resource(dev->bus, res, 0);
}
base = ((res->start >> 8) & AMD_141b_MMIO_BASE_MMIOBASE_MASK) |
AMD_141b_MMIO_BASE_RE_MASK | AMD_141b_MMIO_BASE_WE_MASK;
limit = ((res->end + 1) >> 8) & AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK;
high = ((res->start >> 40) & AMD_141b_MMIO_HIGH_MMIOBASE_MASK) |
((((res->end + 1) >> 40) << AMD_141b_MMIO_HIGH_MMIOLIMIT_SHIFT)
& AMD_141b_MMIO_HIGH_MMIOLIMIT_MASK);
pci_write_config_dword(dev, AMD_141b_MMIO_HIGH(i), high);
pci_write_config_dword(dev, AMD_141b_MMIO_LIMIT(i), limit);
pci_write_config_dword(dev, AMD_141b_MMIO_BASE(i), base);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
#define RS690_LOWER_TOP_OF_DRAM2 0x30
#define RS690_LOWER_TOP_OF_DRAM2_VALID 0x1
#define RS690_UPPER_TOP_OF_DRAM2 0x31
#define RS690_HTIU_NB_INDEX 0xA8
#define RS690_HTIU_NB_INDEX_WR_ENABLE 0x100
#define RS690_HTIU_NB_DATA 0xAC
/*
* Some BIOS implementations support RAM above 4GB, but do not configure the
* PCI host to respond to bus master accesses for these addresses. These
* implementations set the TOP_OF_DRAM_SLOT1 register correctly, so PCI DMA
* works as expected for addresses below 4GB.
*
* Reference: "AMD RS690 ASIC Family Register Reference Guide" (pg. 2-57)
* https://www.amd.com/system/files/TechDocs/43372_rs690_rrg_3.00o.pdf
*/
static void rs690_fix_64bit_dma(struct pci_dev *pdev)
{
u32 val = 0;
phys_addr_t top_of_dram = __pa(high_memory - 1) + 1;
if (top_of_dram <= (1ULL << 32))
return;
pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
RS690_LOWER_TOP_OF_DRAM2);
pci_read_config_dword(pdev, RS690_HTIU_NB_DATA, &val);
if (val)
return;
pci_info(pdev, "Adjusting top of DRAM to %pa for 64-bit DMA support\n", &top_of_dram);
pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
RS690_UPPER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE);
pci_write_config_dword(pdev, RS690_HTIU_NB_DATA, top_of_dram >> 32);
pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
RS690_LOWER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE);
pci_write_config_dword(pdev, RS690_HTIU_NB_DATA,
top_of_dram | RS690_LOWER_TOP_OF_DRAM2_VALID);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7910, rs690_fix_64bit_dma);
#endif
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