// SPDX-License-Identifier: GPL-2.0
/*
* Exceptions for specific devices . Usually work - arounds for fatal design flaws .
*/
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/pci.h>
#include <linux/suspend.h>
#include <linux/vgaarb.h>
#include <asm /amd/node.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 = 0 xd0;
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, 0 x4a, &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 0 x55 need to be turned off
* VIA 8367 ( KT266x ) Northbridges :
* - bits 5 , 6 , 7 at offset 0 x95 need to be turned off
* VIA 8363 rev 0 x81 / 0 x84 ( KL133 / KM133 ) Northbridges :
* - bits 6 , 7 at offset 0 x55 need to be turned off
*/
#define VIA_8363_KL133_REVISION_ID 0 x81
#define VIA_8363_KM133_REVISION_ID 0 x84
static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
{
u8 v;
int where = 0 x55;
int mask = 0 x1f; /* 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 = 0 x95; /* 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 = 0 x3f; /* 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 & 0 xff00) == 0 x2400)
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 0 x1F0FFF01 0 x1F01FF01
* C18D 0 x9F0FFF01 0 x9F01FF01
*
* Northbridge chip version may be determined by
* reading the PCI revision ID ( 0 xC1 or greater is C18D ) .
*/
pci_read_config_dword(dev, 0 x6c, &val);
/*
* Apply fixup if needed , but don ' t touch disconnect state
*/
if ((val & 0 x00FF0000) != 0 x00010000) {
dev_warn(&dev->dev, "nForce2 C1 Halt Disconnect fixup\n" );
pci_write_config_dword(dev, 0 x6c, (val & 0 xFF00FFFF) | 0 x00010000);
}
}
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 0 xC0000 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 = 0 xC0000;
res->end = res->start + 0 x20000 - 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_HEADER(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 mainboard 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, 0 x50, &val);
if (val & 0 x40) {
pci_write_config_byte(dev, 0 x50, val & (~0 x40));
/* verify the change for status output */
pci_read_config_byte(dev, 0 x50, &val);
if (val & 0 x40)
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, 0 x8032,
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, 0 x8032,
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, 0 x42, &r);
r &= 0 xfd;
pci_write_config_byte(dev, 0 x42, 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, 0 x0015,
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 0 x55 does something different
* for the SB700 , so make sure we are dealing with the
* SB600 before touching the bit :
*/
pci_read_config_byte(dev, 0 x08, &val);
if (val < 0 x2F) {
outb(0 x55, 0 xCD6);
val = inb(0 xCD7);
/* Set bit 7 in PM register 0x55 */
outb(0 x55, 0 xCD6);
outb(val | 0 x80, 0 xCD7);
}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0 x4385, 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, 0 x4385, 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 == 0 x14FF && dev->subsystem_device == 0 xA003) {
pr_info("Reserving memory on Twinhead H12Y\n" );
request_mem_region(0 xFFB00000, 0 x100000, "twinhead" );
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0 x27B9, twinhead_reserve_killing_zone);
/*
* Device [ 8086 : 2 fc0 ]
* 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 : 6 f60 , 6 fa0 , 6 fc0 ]
* 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, 0 x2fc0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0 x6f60, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0 x6fa0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0 x6fc0, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0 xa1ec, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0 xa1ed, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0 xa26c, pci_invalid_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0 xa26d, 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_D3hot | PCI_PM_CAP_PME_D3cold)
>> PCI_PM_CAP_PME_SHIFT);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0 x7808, 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, 0 x7914, pci_fixup_amd_fch_xhci_pme);
/*
* Apple MacBook Pro : Avoid [ mem 0 x7fa00000 - 0 x7fbfffff ]
*
* Using the [ mem 0 x7fa00000 - 0 x7fbfffff ] region , e . g . , by assigning it to
* the 00 : 1 c . 0 Root Port , causes a conflict with [ io 0 x1804 ] , 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(0 x1c, 0 ))
return ;
res = request_mem_region(0 x7fa00000, 0 x200000,
"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, 0 x8c10, 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 2 k of RTIT_BAR ( intel_th resource 4 ) , which
* appears to be 4 MB in reality .
*/
if (r->end == r->start + 0 x7ff) {
r->start = 0 ;
r->end = 0 x3fffff;
r->flags |= IORESOURCE_UNSET;
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0 x19e1, quirk_intel_th_dnv);
#ifdef CONFIG_PHYS_ADDR_T_64BIT
#define AMD_141b_MMIO_BASE(x) (0 x80 + (x) * 0 x8)
#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) (0 x84 + (x) * 0 x8)
#define AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK GENMASK(31 ,8 )
#define AMD_141b_MMIO_HIGH(x) (0 x180 + (x) * 0 x4)
#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 64 bit BAR for
* PCIe device on AMD Family 15 h ( Models 00 h - 1 fh , 30 h - 3 fh , 60 h - 7 fh ) 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 > 0 x10000)
return ;
}
if (i == 8 )
return ;
res = kzalloc(sizeof (*res), GFP_KERNEL);
if (!res)
return ;
/*
* Allocate a 256 GB window directly below the 0 xfd00000000 hardware
* limit ( see AMD Family 15 h Models 30 h - 3 Fh BKDG , sec 2 . 4 . 6 ) .
*/
res->name = name;
res->flags = IORESOURCE_PREFETCH | IORESOURCE_MEM |
IORESOURCE_MEM_64 | IORESOURCE_WINDOW;
res->start = 0 xbd00000000ull;
res->end = 0 xfd00000000ull - 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);
}
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, 0 x1401, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0 x141b, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0 x1571, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0 x15b1, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0 x1601, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x1401, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x141b, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x1571, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x15b1, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x1601, pci_amd_enable_64bit_bar);
#define RS690_LOWER_TOP_OF_DRAM2 0 x30
#define RS690_LOWER_TOP_OF_DRAM2_VALID 0 x1
#define RS690_UPPER_TOP_OF_DRAM2 0 x31
#define RS690_HTIU_NB_INDEX 0 xA8
#define RS690_HTIU_NB_INDEX_WR_ENABLE 0 x100
#define RS690_HTIU_NB_DATA 0 xAC
/*
* Some BIOS implementations support RAM above 4 GB , 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 4 GB .
*
* 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 <= (1 ULL << 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, 0 x7910, rs690_fix_64bit_dma);
#endif
#ifdef CONFIG_AMD_NODE
#define AMD_15B8_RCC_DEV2_EPF0_STRAP2 0 x10136008
#define AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK 0 x00000080L
static void quirk_clear_strap_no_soft_reset_dev2_f0(struct pci_dev *dev)
{
u32 data;
if (!amd_smn_read(0 , AMD_15B8_RCC_DEV2_EPF0_STRAP2, &data)) {
data &= ~AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK;
if (amd_smn_write(0 , AMD_15B8_RCC_DEV2_EPF0_STRAP2, data))
pci_err(dev, "Failed to write data 0x%x\n" , data);
} else {
pci_err(dev, "Failed to read data\n" );
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0 x15b8, quirk_clear_strap_no_soft_reset_dev2_f0);
#endif
/*
* When returning from D3cold to D0 , firmware on some Google Coral and Reef
* family Chromebooks with Intel Apollo Lake SoC clobbers the headers of
* both the L1 PM Substates capability and the previous capability for the
* " Celeron N3350 / Pentium N4200 / Atom E3900 Series PCI Express Port B # 1 " .
*
* Save those values at enumeration - time and restore them at resume .
*/
static u16 prev_cap, l1ss_cap;
static u32 prev_header, l1ss_header;
static void chromeos_save_apl_pci_l1ss_capability(struct pci_dev *dev)
{
int pos = PCI_CFG_SPACE_SIZE, prev = 0 ;
u32 header, pheader = 0 ;
while (pos) {
pci_read_config_dword(dev, pos, &header);
if (PCI_EXT_CAP_ID(header) == PCI_EXT_CAP_ID_L1SS) {
prev_cap = prev;
prev_header = pheader;
l1ss_cap = pos;
l1ss_header = header;
return ;
}
prev = pos;
pheader = header;
pos = PCI_EXT_CAP_NEXT(header);
}
}
static void chromeos_fixup_apl_pci_l1ss_capability(struct pci_dev *dev)
{
u32 header;
if (!prev_cap || !prev_header || !l1ss_cap || !l1ss_header)
return ;
/* Fixup the header of L1SS Capability if missing */
pci_read_config_dword(dev, l1ss_cap, &header);
if (header != l1ss_header) {
pci_write_config_dword(dev, l1ss_cap, l1ss_header);
pci_info(dev, "restore L1SS Capability header (was %#010x now %#010x)\n" ,
header, l1ss_header);
}
/* Fixup the link to L1SS Capability if missing */
pci_read_config_dword(dev, prev_cap, &header);
if (header != prev_header) {
pci_write_config_dword(dev, prev_cap, prev_header);
pci_info(dev, "restore previous Capability header (was %#010x now %#010x)\n" ,
header, prev_header);
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0 x5ad6, chromeos_save_apl_pci_l1ss_capability);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0 x5ad6, chromeos_fixup_apl_pci_l1ss_capability);
/*
* Disable D3cold on Asus B1400 PCI - NVMe bridge
*
* On this platform with VMD off , the NVMe device cannot successfully power
* back on from D3cold . This appears to be an untested transition by the
* vendor : Windows leaves the NVMe and parent bridge in D0 during suspend .
*
* We disable D3cold on the parent bridge for simplicity , and the fact that
* both parent bridge and NVMe device share the same power resource .
*
* This is only needed on BIOS versions before 308 ; the newer versions flip
* StorageD3Enable from 1 to 0 .
*/
static const struct dmi_system_id asus_nvme_broken_d3cold_table[] = {
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC." ),
DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.304" ),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC." ),
DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.305" ),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC." ),
DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.306" ),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC." ),
DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.307" ),
},
},
{}
};
static void asus_disable_nvme_d3cold(struct pci_dev *pdev)
{
if (dmi_check_system(asus_nvme_broken_d3cold_table) > 0 )
pci_d3cold_disable(pdev);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0 x9a09, asus_disable_nvme_d3cold);
#ifdef CONFIG_SUSPEND
/*
* Root Ports on some AMD SoCs advertise PME_Support for D3hot and D3cold , but
* if the SoC is put into a hardware sleep state by the amd - pmc driver , the
* Root Ports don ' t generate wakeup interrupts for USB devices .
*
* When suspending , remove D3hot and D3cold from the PME_Support advertised
* by the Root Port so we don ' t use those states if we ' re expecting wakeup
* interrupts . Restore the advertised PME_Support when resuming .
*/
static void amd_rp_pme_suspend(struct pci_dev *dev)
{
struct pci_dev *rp;
/*
* If system suspend is not in progress , we ' re doing runtime suspend , so
* amd - pmc will not be involved so PMEs during D3 work as advertised .
*
* The PMEs * do * work if amd - pmc doesn ' t put the SoC in the hardware
* sleep state , but we assume amd - pmc is always present .
*/
if (!pm_suspend_in_progress())
return ;
rp = pcie_find_root_port(dev);
if (!rp || !rp->pm_cap)
return ;
rp->pme_support &= ~((PCI_PM_CAP_PME_D3hot|PCI_PM_CAP_PME_D3cold) >>
PCI_PM_CAP_PME_SHIFT);
dev_info_once(&rp->dev, "quirk: disabling D3cold for suspend\n" );
}
static void amd_rp_pme_resume(struct pci_dev *dev)
{
struct pci_dev *rp;
u16 pmc;
rp = pcie_find_root_port(dev);
if (!rp || !rp->pm_cap)
return ;
pci_read_config_word(rp, rp->pm_cap + PCI_PM_PMC, &pmc);
rp->pme_support = FIELD_GET(PCI_PM_CAP_PME_MASK, pmc);
}
/* Rembrandt (yellow_carp) */
DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0 x162e, amd_rp_pme_suspend);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x162e, amd_rp_pme_resume);
DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0 x162f, amd_rp_pme_suspend);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x162f, amd_rp_pme_resume);
/* Phoenix (pink_sardine) */
DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0 x1668, amd_rp_pme_suspend);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x1668, amd_rp_pme_resume);
DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0 x1669, amd_rp_pme_suspend);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0 x1669, amd_rp_pme_resume);
/*
* Putting PCIe root ports on Ryzen SoCs with USB4 controllers into D3hot
* may cause problems when the system attempts wake up from s2idle .
*
* On the TUXEDO Sirius 16 Gen 1 with a specific old BIOS this manifests as
* a system hang .
*/
static const struct dmi_system_id quirk_tuxeo_rp_d3_dmi_table[] = {
{
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TUXEDO" ),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "APX958" ),
DMI_EXACT_MATCH(DMI_BIOS_VERSION, "V1.00A00_20240108" ),
},
},
{}
};
static void quirk_tuxeo_rp_d3(struct pci_dev *pdev)
{
struct pci_dev *root_pdev;
if (dmi_check_system(quirk_tuxeo_rp_d3_dmi_table)) {
root_pdev = pcie_find_root_port(pdev);
if (root_pdev)
root_pdev->dev_flags |= PCI_DEV_FLAGS_NO_D3;
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0 x1502, quirk_tuxeo_rp_d3);
#endif /* CONFIG_SUSPEND */
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