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authorBjorn Helgaas <bhelgaas@google.com>2018-05-02 08:53:19 -0500
committerBjorn Helgaas <helgaas@kernel.org>2018-05-10 16:50:18 -0500
commit82e1719c4cd65bd7f7847d6c02376cfca3d5e793 (patch)
treeed0e8c028a78f52196fdce7af96eee2d4856db0c /drivers/pci/quirks.c
parent780473508ace12fa58fb50339d3899c055ec4cad (diff)
PCI: Clean up whitespace in quirks.c
Clean up whitespace, capitalization, etc. in comments. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c664
1 files changed, 329 insertions, 335 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 0f2b117cc59c..de7c77e2ebbd 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -199,9 +199,10 @@ static void quirk_mmio_always_on(struct pci_dev *dev)
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_BRIDGE_HOST, 8, quirk_mmio_always_on);
-/* The Mellanox Tavor device gives false positive parity errors
- * Mark this device with a broken_parity_status, to allow
- * PCI scanning code to "skip" this now blacklisted device.
+/*
+ * The Mellanox Tavor device gives false positive parity errors. Mark this
+ * device with a broken_parity_status to allow PCI scanning code to "skip"
+ * this now blacklisted device.
*/
static void quirk_mellanox_tavor(struct pci_dev *dev)
{
@@ -210,15 +211,19 @@ static void quirk_mellanox_tavor(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR, quirk_mellanox_tavor);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_TAVOR_BRIDGE, quirk_mellanox_tavor);
-/* Deal with broken BIOSes that neglect to enable passive release,
- which can cause problems in combination with the 82441FX/PPro MTRRs */
+/*
+ * 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. */
+ /*
+ * 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)) {
@@ -231,13 +236,14 @@ static void quirk_passive_release(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release);
-/* The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a workaround
- but VIA don't answer queries. If you happen to have good contacts at VIA
- ask them for me please -- Alan
-
- This appears to be BIOS not version dependent. So presumably there is a
- chipset level fix */
-
+/*
+ * 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) {
@@ -245,10 +251,10 @@ static void quirk_isa_dma_hangs(struct pci_dev *dev)
pci_info(dev, "Activating ISA DMA hang workarounds\n");
}
}
- /*
- * Its not totally clear which chipsets are the problematic ones
- * We know 82C586 and 82C596 variants are affected.
- */
+/*
+ * 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);
@@ -277,9 +283,7 @@ static void quirk_tigerpoint_bm_sts(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TGP_LPC, quirk_tigerpoint_bm_sts);
-/*
- * Chipsets where PCI->PCI transfers vanish or hang
- */
+/* Chipsets where PCI->PCI transfers vanish or hang */
static void quirk_nopcipci(struct pci_dev *dev)
{
if ((pci_pci_problems & PCIPCI_FAIL) == 0) {
@@ -302,9 +306,7 @@ static void quirk_nopciamd(struct pci_dev *dev)
}
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
- */
+/* Triton requires workarounds to be used by the drivers */
static void quirk_triton(struct pci_dev *dev)
{
if ((pci_pci_problems&PCIPCI_TRITON) == 0) {
@@ -318,53 +320,62 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82439, quirk_tr
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.
+ * 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
+ * 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 */
+ /*
+ * 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 */
+
+ /*
+ * 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....
+ * 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..
+ * VIA only apply this fix when an SB Live! is present but under
+ * both Linux and Windows this isn't enough, and we have seen
+ * corruption without SB Live! but with things like 3 UDMA IDE
+ * controllers. So we ignore that bit of the VIA recommendation..
*/
-
pci_read_config_byte(dev, 0x76, &busarb);
- /* Set bit 4 and bi 5 of byte 76 to 0x01
- "Master priority rotation on every PCI master grant */
+
+ /*
+ * 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);
@@ -380,9 +391,7 @@ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_vial
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
- */
+/* VIA Apollo VP3 needs ETBF on BT848/878 */
static void quirk_viaetbf(struct pci_dev *dev)
{
if ((pci_pci_problems&PCIPCI_VIAETBF) == 0) {
@@ -402,10 +411,9 @@ static void quirk_vsfx(struct pci_dev *dev)
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]
+ * 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)
{
@@ -417,10 +425,7 @@ static void quirk_alimagik(struct pci_dev *dev)
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
- */
+/* 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) {
@@ -436,8 +441,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_1, quir
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.
+ * 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)
{
@@ -477,8 +482,8 @@ static void quirk_extend_bar_to_page(struct pci_dev *dev)
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.
+ * 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)
{
@@ -569,8 +574,8 @@ static void quirk_io_region(struct pci_dev *dev, int port,
}
/*
- * ATI Northbridge setups MCE the processor if you even
- * read somewhere between 0x3b0->0x3bb or read 0x3d3
+ * 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)
{
@@ -585,6 +590,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100, quirk_ati_
* In the AMD NL platform, this device ([1022:7912]) has a class code of
* PCI_CLASS_SERIAL_USB_XHCI (0x0c0330), which means the xhci driver will
* claim it.
+ *
* But the dwc3 driver is a more specific driver for this device, and we'd
* prefer to use it instead of xhci. To prevent xhci from claiming the
* device, change the class code to 0x0c03fe, which the PCI r3.0 spec
@@ -604,11 +610,10 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB,
quirk_amd_nl_class);
/*
- * 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).
+ * 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)
@@ -664,6 +669,7 @@ static void piix4_mem_quirk(struct pci_dev *dev, const char *name, unsigned int
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.
@@ -735,8 +741,7 @@ static void quirk_ich4_lpc_acpi(struct pci_dev *dev)
* 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,
@@ -773,7 +778,8 @@ static void ich6_lpc_acpi_gpio(struct pci_dev *dev)
"ICH6 GPIO");
}
-static void ich6_lpc_generic_decode(struct pci_dev *dev, unsigned reg, const char *name, int dynsize)
+static void ich6_lpc_generic_decode(struct pci_dev *dev, unsigned reg,
+ const char *name, int dynsize)
{
u32 val;
u32 size, base;
@@ -797,7 +803,10 @@ static void ich6_lpc_generic_decode(struct pci_dev *dev, unsigned reg, const cha
}
base &= ~(size-1);
- /* Just print it out for now. We should reserve it after more debugging */
+ /*
+ * 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);
}
@@ -813,7 +822,8 @@ static void quirk_ich6_lpc(struct pci_dev *dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0, quirk_ich6_lpc);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, quirk_ich6_lpc);
-static void ich7_lpc_generic_decode(struct pci_dev *dev, unsigned reg, const char *name)
+static void ich7_lpc_generic_decode(struct pci_dev *dev, unsigned reg,
+ const char *name)
{
u32 val;
u32 mask, base;
@@ -824,15 +834,15 @@ static void ich7_lpc_generic_decode(struct pci_dev *dev, unsigned reg, const cha
if (!(val & 1))
return;
- /*
- * IO base in bits 15:2, mask in bits 23:18, both
- * are dword-based
- */
+ /* 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 */
+ /*
+ * 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);
}
@@ -904,8 +914,8 @@ static void quirk_vt8235_acpi(struct pci_dev *dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, quirk_vt8235_acpi);
/*
- * TI XIO2000a PCIe-PCI Bridge erroneously reports it supports fast back-to-back:
- * Disable fast back-to-back on the secondary bus segment
+ * TI XIO2000a PCIe-PCI Bridge erroneously reports it supports fast
+ * back-to-back: Disable fast back-to-back on the secondary bus segment
*/
static void quirk_xio2000a(struct pci_dev *dev)
{
@@ -930,8 +940,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XIO2000A,
* VIA 686A/B: If an IO-APIC is active, we need to route all on-chip
* devices to the external APIC.
*
- * TODO: When we have device-specific interrupt routers,
- * this code will go away from quirks.
+ * TODO: When we have device-specific interrupt routers, this code will go
+ * away from quirks.
*/
static void quirk_via_ioapic(struct pci_dev *dev)
{
@@ -972,13 +982,13 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_vt
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_vt8237_bypass_apic_deassert);
/*
- * The AMD io apic can hang the box when an apic irq is masked.
+ * The AMD IO-APIC can hang the box when an APIC IRQ is masked.
* We check all revs >= B0 (yet not in the pre production!) as the bug
* is currently marked NoFix
*
* We have multiple reports of hangs with this chipset that went away with
* noapic specified. For the moment we assume it's the erratum. We may be wrong
- * of course. However the advice is demonstrably good even if so..
+ * of course. However the advice is demonstrably good even if so.
*/
static void quirk_amd_ioapic(struct pci_dev *dev)
{
@@ -994,7 +1004,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410, quirk_a
static void quirk_cavium_sriov_rnm_link(struct pci_dev *dev)
{
- /* Fix for improper SRIOV configuration on Cavium cn88xx RNM device */
+ /* Fix for improper SR-IOV configuration on Cavium cn88xx RNM device */
if (dev->subsystem_device == 0xa118)
dev->sriov->link = dev->devfn;
}
@@ -1016,19 +1026,17 @@ static void quirk_amd_8131_mmrbc(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_amd_8131_mmrbc);
/*
- * FIXME: it is questionable that quirk_via_acpi
- * is needed. It shows up as an ISA bridge, and does not
- * support the PCI_INTERRUPT_LINE register at all. Therefore
- * it seems like setting the pci_dev's 'irq' to the
- * value of the ACPI SCI interrupt is only done for convenience.
+ * FIXME: it is questionable that quirk_via_acpi() is needed. It shows up
+ * as an ISA bridge, and does not support the PCI_INTERRUPT_LINE register
+ * at all. Therefore it seems like setting the pci_dev's IRQ to the value
+ * of the ACPI SCI interrupt is only done for convenience.
* -jgarzik
*/
static void quirk_via_acpi(struct pci_dev *d)
{
- /*
- * VIA ACPI device: SCI IRQ line in PCI config byte 0x42
- */
u8 irq;
+
+ /* VIA ACPI device: SCI IRQ line in PCI config byte 0x42 */
pci_read_config_byte(d, 0x42, &irq);
irq &= 0xf;
if (irq && (irq != 2))
@@ -1037,11 +1045,7 @@ static void quirk_via_acpi(struct pci_dev *d)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_via_acpi);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_via_acpi);
-
-/*
- * VIA bridges which have VLink
- */
-
+/* VIA bridges which have VLink */
static int via_vlink_dev_lo = -1, via_vlink_dev_hi = 18;
static void quirk_via_bridge(struct pci_dev *dev)
@@ -1049,9 +1053,11 @@ static void quirk_via_bridge(struct pci_dev *dev)
/* See what bridge we have and find the device ranges */
switch (dev->device) {
case PCI_DEVICE_ID_VIA_82C686:
- /* The VT82C686 is special, it attaches to PCI and can have
- any device number. All its subdevices are functions of
- that single device. */
+ /*
+ * The VT82C686 is special; it attaches to PCI and can have
+ * any device number. All its subdevices are functions of
+ * that single device.
+ */
via_vlink_dev_lo = PCI_SLOT(dev->devfn);
via_vlink_dev_hi = PCI_SLOT(dev->devfn);
break;
@@ -1079,19 +1085,17 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, quirk_via_b
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_bridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237A, quirk_via_bridge);
-/**
- * quirk_via_vlink - VIA VLink IRQ number update
- * @dev: PCI device
+/*
+ * quirk_via_vlink - VIA VLink IRQ number update
+ * @dev: PCI device
*
- * If the device we are dealing with is on a PIC IRQ we need to
- * ensure that the IRQ line register which usually is not relevant
- * for PCI cards, is actually written so that interrupts get sent
- * to the right place.
- * We only do this on systems where a VIA south bridge was detected,
- * and only for VIA devices on the motherboard (see quirk_via_bridge
- * above).
+ * If the device we are dealing with is on a PIC IRQ we need to ensure that
+ * the IRQ line register which usually is not relevant for PCI cards, is
+ * actually written so that interrupts get sent to the right place.
+ *
+ * We only do this on systems where a VIA south bridge was detected, and
+ * only for VIA devices on the motherboard (see quirk_via_bridge above).
*/
-
static void quirk_via_vlink(struct pci_dev *dev)
{
u8 irq, new_irq;
@@ -1111,9 +1115,10 @@ static void quirk_via_vlink(struct pci_dev *dev)
PCI_SLOT(dev->devfn) < via_vlink_dev_lo)
return;
- /* This is an internal VLink device on a PIC interrupt. The BIOS
- ought to have set this but may not have, so we redo it */
-
+ /*
+ * This is an internal VLink device on a PIC interrupt. The BIOS
+ * ought to have set this but may not have, so we redo it.
+ */
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
if (new_irq != irq) {
pci_info(dev, "VIA VLink IRQ fixup, from %d to %d\n",
@@ -1125,10 +1130,9 @@ static void quirk_via_vlink(struct pci_dev *dev)
DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_vlink);
/*
- * VIA VT82C598 has its device ID settable and many BIOSes
- * set it to the ID of VT82C597 for backward compatibility.
- * We need to switch it off to be able to recognize the real
- * type of the chip.
+ * VIA VT82C598 has its device ID settable and many BIOSes set it to the ID
+ * of VT82C597 for backward compatibility. We need to switch it off to be
+ * able to recognize the real type of the chip.
*/
static void quirk_vt82c598_id(struct pci_dev *dev)
{
@@ -1138,10 +1142,10 @@ static void quirk_vt82c598_id(struct pci_dev *dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_vt82c598_id);
/*
- * CardBus controllers have a legacy base address that enables them
- * to respond as i82365 pcmcia controllers. We don't want them to
- * do this even if the Linux CardBus driver is not loaded, because
- * the Linux i82365 driver does not (and should not) handle CardBus.
+ * CardBus controllers have a legacy base address that enables them to
+ * respond as i82365 pcmcia controllers. We don't want them to do this
+ * even if the Linux CardBus driver is not loaded, because the Linux i82365
+ * driver does not (and should not) handle CardBus.
*/
static void quirk_cardbus_legacy(struct pci_dev *dev)
{
@@ -1153,11 +1157,11 @@ DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_BRIDGE_CARDBUS, 8, quirk_cardbus_legacy);
/*
- * Following the PCI ordering rules is optional on the AMD762. I'm not
- * sure what the designers were smoking but let's not inhale...
+ * Following the PCI ordering rules is optional on the AMD762. I'm not sure
+ * what the designers were smoking but let's not inhale...
*
- * To be fair to AMD, it follows the spec by default, its BIOS people
- * who turn it off!
+ * To be fair to AMD, it follows the spec by default, it's BIOS people who
+ * turn it off!
*/
static void quirk_amd_ordering(struct pci_dev *dev)
{
@@ -1176,11 +1180,11 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering);
/*
- * DreamWorks provided workaround for Dunord I-3000 problem
+ * DreamWorks-provided workaround for Dunord I-3000 problem
*
- * This card decodes and responds to addresses not apparently
- * assigned to it. We force a larger allocation to ensure that
- * nothing gets put too close to it.
+ * This card decodes and responds to addresses not apparently assigned to
+ * it. We force a larger allocation to ensure that nothing gets put too
+ * close to it.
*/
static void quirk_dunord(struct pci_dev *dev)
{
@@ -1193,10 +1197,9 @@ static void quirk_dunord(struct pci_dev *dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DUNORD, PCI_DEVICE_ID_DUNORD_I3000, quirk_dunord);
/*
- * i82380FB mobile docking controller: its PCI-to-PCI bridge
- * is subtractive decoding (transparent), and does indicate this
- * in the ProgIf. Unfortunately, the ProgIf value is wrong - 0x80
- * instead of 0x01.
+ * i82380FB mobile docking controller: its PCI-to-PCI bridge is subtractive
+ * decoding (transparent), and does indicate this in the ProgIf.
+ * Unfortunately, the ProgIf value is wrong - 0x80 instead of 0x01.
*/
static void quirk_transparent_bridge(struct pci_dev *dev)
{
@@ -1206,10 +1209,10 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82380FB, quirk
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA, 0x605, quirk_transparent_bridge);
/*
- * Common misconfiguration of the MediaGX/Geode PCI master that will
- * reduce PCI bandwidth from 70MB/s to 25MB/s. See the GXM/GXLV/GX1
- * datasheets found at http://www.national.com/analog for info on what
- * these bits do. <christer@weinigel.se>
+ * Common misconfiguration of the MediaGX/Geode PCI master that will reduce
+ * PCI bandwidth from 70MB/s to 25MB/s. See the GXM/GXLV/GX1 datasheets
+ * found at http://www.national.com/analog for info on what these bits do.
+ * <christer@weinigel.se>
*/
static void quirk_mediagx_master(struct pci_dev *dev)
{
@@ -1227,9 +1230,9 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, qui
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master);
/*
- * Ensure C0 rev restreaming is off. This is normally done by
- * the BIOS but in the odd case it is not the results are corruption
- * hence the presence of a Linux check
+ * Ensure C0 rev restreaming is off. This is normally done by the BIOS but
+ * in the odd case it is not the results are corruption hence the presence
+ * of a Linux check.
*/
static void quirk_disable_pxb(struct pci_dev *pdev)
{
@@ -1273,9 +1276,7 @@ DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SATA
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x7900, quirk_amd_ide_mode);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AMD, 0x7900, quirk_amd_ide_mode);
-/*
- * Serverworks CSB5 IDE does not fully support native mode
- */
+/* Serverworks CSB5 IDE does not fully support native mode */
static void quirk_svwks_csb5ide(struct pci_dev *pdev)
{
u8 prog;
@@ -1289,9 +1290,7 @@ static void quirk_svwks_csb5ide(struct pci_dev *pdev)
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, quirk_svwks_csb5ide);
-/*
- * Intel 82801CAM ICH3-M datasheet says IDE modes must be the same
- */
+/* Intel 82801CAM ICH3-M datasheet says IDE modes must be the same */
static void quirk_ide_samemode(struct pci_dev *pdev)
{
u8 prog;
@@ -1307,10 +1306,7 @@ static void quirk_ide_samemode(struct pci_dev *pdev)
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, quirk_ide_samemode);
-/*
- * Some ATA devices break if put into D3
- */
-
+/* Some ATA devices break if put into D3 */
static void quirk_no_ata_d3(struct pci_dev *pdev)
{
pdev->dev_flags |= PCI_DEV_FLAGS_NO_D3;
@@ -1328,7 +1324,8 @@ DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AL, PCI_ANY_ID,
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_VIA, PCI_ANY_ID,
PCI_CLASS_STORAGE_IDE, 8, quirk_no_ata_d3);
-/* This was originally an Alpha specific thing, but it really fits here.
+/*
+ * This was originally an Alpha-specific thing, but it really fits here.
* The i82375 PCI/EISA bridge appears as non-classified. Fix that.
*/
static void quirk_eisa_bridge(struct pci_dev *dev)
@@ -1337,7 +1334,6 @@ static void quirk_eisa_bridge(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82375, quirk_eisa_bridge);
-
/*
* On ASUS P4B boards, the SMBus PCI Device within the ICH2/4 southbridge
* is not activated. The myth is that Asus said that they do not want the
@@ -1554,15 +1550,19 @@ static void asus_hides_smbus_lpc_ich6_resume_early(struct pci_dev *dev)
if (likely(!asus_hides_smbus || !asus_rcba_base))
return;
+
/* read the Function Disable register, dword mode only */
val = readl(asus_rcba_base + 0x3418);
- writel(val & 0xFFFFFFF7, asus_rcba_base + 0x3418); /* enable the SMBus device */
+
+ /* enable the SMBus device */
+ writel(val & 0xFFFFFFF7, asus_rcba_base + 0x3418);
}
static void asus_hides_smbus_lpc_ich6_resume(struct pci_dev *dev)
{
if (likely(!asus_hides_smbus || !asus_rcba_base))
return;
+
iounmap(asus_rcba_base);
asus_rcba_base = NULL;
pci_info(dev, "Enabled ICH6/i801 SMBus device\n");
@@ -1579,9 +1579,7 @@ DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc_ich6_resume);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc_ich6_resume_early);
-/*
- * SiS 96x south bridge: BIOS typically hides SMBus device...
- */
+/* SiS 96x south bridge: BIOS typically hides SMBus device... */
static void quirk_sis_96x_smbus(struct pci_dev *dev)
{
u8 val = 0;
@@ -1604,7 +1602,7 @@ DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC, quirk_si
* ... This is further complicated by the fact that some SiS96x south
* bridges pretend to be 85C503/5513 instead. In that case see if we
* spotted a compatible north bridge to make sure.
- * (pci_find_device doesn't work yet)
+ * (pci_find_device() doesn't work yet)
*
* We can also enable the sis96x bit in the discovery register..
*/
@@ -1624,9 +1622,9 @@ static void quirk_sis_503(struct pci_dev *dev)
}
/*
- * Ok, it now shows up as a 96x.. run the 96x quirk by
- * hand in case it has already been processed.
- * (depends on link order, which is apparently not guaranteed)
+ * Ok, it now shows up as a 96x. Run the 96x quirk by hand in case
+ * it has already been processed. (Depends on link order, which is
+ * apparently not guaranteed)
*/
dev->device = devid;
quirk_sis_96x_smbus(dev);
@@ -1634,7 +1632,6 @@ static void quirk_sis_503(struct pci_dev *dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503);
-
/*
* On ASUS A8V and A8V Deluxe boards, the onboard AC97 audio controller
* and MC97 modem controller are disabled when a second PCI soundcard is
@@ -1671,9 +1668,8 @@ DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, asus_h
#if defined(CONFIG_ATA) || defined(CONFIG_ATA_MODULE)
/*
- * If we are using libata we can drive this chip properly but must
- * do this early on to make the additional device appear during
- * the PCI scanning.
+ * If we are using libata we can drive this chip properly but must do this
+ * early on to make the additional device appear during the PCI scanning.
*/
static void quirk_jmicron_ata(struct pci_dev *pdev)
{
@@ -1769,14 +1765,18 @@ static void quirk_alder_ioapic(struct pci_dev *pdev)
if ((pdev->class >> 8) != 0xff00)
return;
- /* the first BAR is the location of the IO APIC...we must
+ /*
+ * The first BAR is the location of the IO-APIC... we must
* not touch this (and it's already covered by the fixmap), so
- * forcibly insert it into the resource tree */
+ * forcibly insert it into the resource tree.
+ */
if (pci_resource_start(pdev, 0) && pci_resource_len(pdev, 0))
insert_resource(&iomem_resource, &pdev->resource[0]);
- /* The next five BARs all seem to be rubbish, so just clean
- * them out */
+ /*
+ * The next five BARs all seem to be rubbish, so just clean
+ * them out.
+ */
for (i = 1; i < 6; i++)
memset(&pdev->resource[i], 0, sizeof(pdev->resource[i]));
}
@@ -1794,8 +1794,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quir
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, PCI_CLASS_BRIDGE_PCI, 8, quirk_pcie_mch);
/*
- * It's possible for the MSI to get corrupted if shpc and acpi
- * are used together on certain PXH-based systems.
+ * It's possible for the MSI to get corrupted if SHPC and ACPI are used
+ * together on certain PXH-based systems.
*/
static void quirk_pcie_pxh(struct pci_dev *dev)
{
@@ -1809,15 +1809,14 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_1, quirk_pc
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHV, quirk_pcie_pxh);
/*
- * Some Intel PCI Express chipsets have trouble with downstream
- * device power management.
+ * Some Intel PCI Express chipsets have trouble with downstream device
+ * power management.
*/
static void quirk_intel_pcie_pm(struct pci_dev *dev)
{
pci_pm_d3_delay = 120;
dev->no_d1d2 = 1;
}
-
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e2, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e3, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x25e4, quirk_intel_pcie_pm);
@@ -1879,7 +1878,7 @@ static const struct dmi_system_id boot_interrupt_dmi_table[] = {
/*
* Boot interrupts on some chipsets cannot be turned off. For these chipsets,
- * remap the original interrupt in the linux kernel to the boot interrupt, so
+ * remap the original interrupt in the Linux kernel to the boot interrupt, so
* that a PCI device's interrupt handler is installed on the boot interrupt
* line instead.
*/
@@ -1916,7 +1915,7 @@ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80332_1, quirk
*/
/*
- * IO-APIC1 on 6300ESB generates boot interrupts, see intel order no
+ * IO-APIC1 on 6300ESB generates boot interrupts, see Intel order no
* 300641-004US, section 5.7.3.
*/
#define INTEL_6300_IOAPIC_ABAR 0x40
@@ -1939,9 +1938,7 @@ static void quirk_disable_intel_boot_interrupt(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10, quirk_disable_intel_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_10, quirk_disable_intel_boot_interrupt);
-/*
- * disable boot interrupts on HT-1000
- */
+/* Disable boot interrupts on HT-1000 */
#define BC_HT1000_FEATURE_REG 0x64
#define BC_HT1000_PIC_REGS_ENABLE (1<<0)
#define BC_HT1000_MAP_IDX 0xC00
@@ -1972,9 +1969,8 @@ static void quirk_disable_broadcom_boot_interrupt(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000SB, quirk_disable_broadcom_boot_interrupt);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000SB, quirk_disable_broadcom_boot_interrupt);
-/*
- * disable boot interrupts on AMD and ATI chipsets
- */
+/* Disable boot interrupts on AMD and ATI chipsets */
+
/*
* NOIOAMODE needs to be disabled to disable "boot interrupts". For AMD 8131
* rev. A0 and B0, NOIOAMODE needs to be disabled anyway to fix IO-APIC mode
@@ -2050,7 +2046,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA_2,
quirk_tc86c001_ide);
/*
- * PLX PCI 9050 PCI Target bridge controller has an errata that prevents the
+ * PLX PCI 9050 PCI Target bridge controller has an erratum that prevents the
* local configuration registers accessible via BAR0 (memory) or BAR1 (i/o)
* being read correctly if bit 7 of the base address is set.
* The BAR0 or BAR1 region may be disabled (size 0) or enabled (size 128).
@@ -2243,15 +2239,17 @@ static void quirk_p64h2_1k_io(struct pci_dev *dev)
dev->io_window_1k = 1;
}
}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x1460, quirk_p64h2_1k_io);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x1460, quirk_p64h2_1k_io);
-/* Under some circumstances, AER is not linked with extended capabilities.
+/*
+ * Under some circumstances, AER is not linked with extended capabilities.
* Force it to be linked by setting the corresponding control bit in the
* config space.
*/
static void quirk_nvidia_ck804_pcie_aer_ext_cap(struct pci_dev *dev)
{
uint8_t b;
+
if (pci_read_config_byte(dev, 0xf41, &b) == 0) {
if (!(b & 0x20)) {
pci_write_config_byte(dev, 0xf41, b | 0x20);
@@ -2281,8 +2279,10 @@ static void quirk_via_cx700_pci_parking_caching(struct pci_dev *dev)
PCI_DEVICE_ID_VIA_8235_USB_2, NULL);
uint8_t b;
- /* p should contain the first (internal) VT6212L -- see if we have
- an external one by searching again */
+ /*
+ * p should contain the first (internal) VT6212L -- see if we have
+ * an external one by searching again.
+ */
p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235_USB_2, p);
if (!p)
return;
@@ -2327,7 +2327,6 @@ static void quirk_brcm_5719_limit_mrrs(struct pci_dev *dev)
pcie_set_readrq(dev, 2048);
}
}
-
DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_BROADCOM,
PCI_DEVICE_ID_TIGON3_5719,
quirk_brcm_5719_limit_mrrs);
@@ -2335,14 +2334,16 @@ DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_BROADCOM,
#ifdef CONFIG_PCIE_IPROC_PLATFORM
static void quirk_paxc_bridge(struct pci_dev *pdev)
{
- /* The PCI config space is shared with the PAXC root port and the first
+ /*
+ * The PCI config space is shared with the PAXC root port and the first
* Ethernet device. So, we need to workaround this by telling the PCI
* code that the bridge is not an Ethernet device.
*/
if (pdev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
pdev->class = PCI_CLASS_BRIDGE_PCI << 8;
- /* MPSS is not being set properly (as it is currently 0). This is
+ /*
+ * MPSS is not being set properly (as it is currently 0). This is
* because that area of the PCI config space is hard coded to zero, and
* is not modifiable by firmware. Set this to 2 (e.g., 512 byte MPS)
* so that the MPS can be set to the real max value.
@@ -2353,10 +2354,10 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x16cd, quirk_paxc_bridge);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x16f0, quirk_paxc_bridge);
#endif
-/* Originally in EDAC sources for i82875P:
- * Intel tells BIOS developers to hide device 6 which
- * configures the overflow device access containing
- * the DRBs - this is where we expose device 6.
+/*
+ * Originally in EDAC sources for i82875P: Intel tells BIOS developers to
+ * hide device 6 which configures the overflow device access containing the
+ * DRBs - this is where we expose device 6.
* http://www.x86-secret.com/articles/tweak/pat/patsecrets-2.htm
*/
static void quirk_unhide_mch_dev6(struct pci_dev *dev)
@@ -2368,18 +2369,18 @@ static void quirk_unhide_mch_dev6(struct pci_dev *dev)
pci_write_config_byte(dev, 0xF4, reg | 0x02);
}
}
-
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82865_HB,
quirk_unhide_mch_dev6);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82875_HB,
quirk_unhide_mch_dev6);
#ifdef CONFIG_PCI_MSI
-/* Some chipsets do not support MSI. We cannot easily rely on setting
- * PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually
- * some other buses controlled by the chipset even if Linux is not
- * aware of it. Instead of setting the flag on all buses in the
- * machine, simply disable MSI globally.
+/*
+ * Some chipsets do not support MSI. We cannot easily rely on setting
+ * PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually some
+ * other buses controlled by the chipset even if Linux is not aware of it.
+ * Instead of setting the flag on all buses in the machine, simply disable
+ * MSI globally.
*/
static void quirk_disable_all_msi(struct pci_dev *dev)
{
@@ -2427,8 +2428,10 @@ static void quirk_amd_780_apc_msi(struct pci_dev *host_bridge)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9600, quirk_amd_780_apc_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9601, quirk_amd_780_apc_msi);
-/* Go through the list of Hypertransport capabilities and
- * return 1 if a HT MSI capability is found and enabled */
+/*
+ * Go through the list of HyperTransport capabilities and return 1 if a HT
+ * MSI capability is found and enabled.
+ */
static int msi_ht_cap_enabled(struct pci_dev *dev)
{
int pos, ttl = PCI_FIND_CAP_TTL;
@@ -2451,7 +2454,7 @@ static int msi_ht_cap_enabled(struct pci_dev *dev)
return 0;
}
-/* Check the hypertransport MSI mapping to know whether MSI is enabled or not */
+/* Check the HyperTransport MSI mapping to know whether MSI is enabled or not */
static void quirk_msi_ht_cap(struct pci_dev *dev)
{
if (dev->subordinate && !msi_ht_cap_enabled(dev)) {
@@ -2462,8 +2465,9 @@ static void quirk_msi_ht_cap(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT2000_PCIE,
quirk_msi_ht_cap);
-/* The nVidia CK804 chipset may have 2 HT MSI mappings.
- * MSI are supported if the MSI capability set in any of these mappings.
+/*
+ * The nVidia CK804 chipset may have 2 HT MSI mappings. MSI is supported
+ * if the MSI capability is set in any of these mappings.
*/
static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev)
{
@@ -2472,8 +2476,9 @@ static void quirk_nvidia_ck804_msi_ht_cap(struct pci_dev *dev)
if (!dev->subordinate)
return;
- /* check HT MSI cap on this chipset and the root one.
- * a single one having MSI is enough to be sure that MSI are supported.
+ /*
+ * Check HT MSI cap on this chipset and the root one. A single one
+ * having MSI is enough to be sure that MSI is supported.
*/
pdev = pci_get_slot(dev->bus, 0);
if (!pdev)
@@ -2510,13 +2515,13 @@ static void ht_enable_msi_mapping(struct pci_dev *dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS,
PCI_DEVICE_ID_SERVERWORKS_HT1000_PXB,
ht_enable_msi_mapping);
-
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8132_BRIDGE,
ht_enable_msi_mapping);
-/* The P5N32-SLI motherboards from Asus have a problem with msi
- * for the MCP55 NIC. It is not yet determined whether the msi problem
- * also affects other devices. As for now, turn off msi for this device.
+/*
+ * The P5N32-SLI motherboards from Asus have a problem with MSI
+ * for the MCP55 NIC. It is not yet determined whether the MSI problem
+ * also affects other devices. As for now, turn off MSI for this device.
*/
static void nvenet_msi_disable(struct pci_dev *dev)
{
@@ -2553,16 +2558,14 @@ static void nvbridge_check_legacy_irq_routing(struct pci_dev *dev)
pci_read_config_dword(dev, 0x74, &cfg);
if (cfg & ((1 << 2) | (1 << 15))) {
- printk(KERN_INFO "Rewriting irq routing register on MCP55\n");
+ printk(KERN_INFO "Rewriting IRQ routing register on MCP55\n");
cfg &= ~((1 << 2) | (1 << 15));
pci_write_config_dword(dev, 0x74, cfg);
}
}
-
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
PCI_DEVICE_ID_NVIDIA_MCP55_BRIDGE_V0,
nvbridge_check_legacy_irq_routing);
-
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
PCI_DEVICE_ID_NVIDIA_MCP55_BRIDGE_V4,
nvbridge_check_legacy_irq_routing);
@@ -2572,7 +2575,7 @@ static int ht_check_msi_mapping(struct pci_dev *dev)
int pos, ttl = PCI_FIND_CAP_TTL;
int found = 0;
- /* check if there is HT MSI cap or enabled on this device */
+ /* Check if there is HT MSI cap or enabled on this device */
pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
while (pos && ttl--) {
u8 flags;
@@ -2608,7 +2611,7 @@ static int host_bridge_with_leaf(struct pci_dev *host_bridge)
if (!dev)
continue;
- /* found next host bridge ?*/
+ /* found next host bridge? */
pos = pci_find_ht_capability(dev, HT_CAPTYPE_SLAVE);
if (pos != 0) {
pci_dev_put(dev);
@@ -2767,27 +2770,27 @@ static void nv_msi_ht_cap_quirk_all(struct pci_dev *dev)
{
return __nv_msi_ht_cap_quirk(dev, 1);
}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
+DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
static void nv_msi_ht_cap_quirk_leaf(struct pci_dev *dev)
{
return __nv_msi_ht_cap_quirk(dev, 0);
}
-
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
-DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
-
static void quirk_msi_intx_disable_bug(struct pci_dev *dev)
{
dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
}
+
static void quirk_msi_intx_disable_ati_bug(struct pci_dev *dev)
{
struct pci_dev *p;
- /* SB700 MSI issue will be fixed at HW level from revision A21,
+ /*
+ * SB700 MSI issue will be fixed at HW level from revision A21;
* we need check PCI REVISION ID of SMBus controller to get SB700
* revision.
*/
@@ -2800,6 +2803,7 @@ static void quirk_msi_intx_disable_ati_bug(struct pci_dev *dev)
dev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG;
pci_dev_put(p);
}
+
static void quirk_msi_intx_disable_qca_bug(struct pci_dev *dev)
{
/* AR816X/AR817X/E210X MSI is fixed at HW level from revision 0x18 */
@@ -2869,55 +2873,56 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATTANSIC, 0xe091,
quirk_msi_intx_disable_qca_bug);
#endif /* CONFIG_PCI_MSI */
-/* Allow manual resource allocation for PCI hotplug bridges
- * via pci=hpmemsize=nnM and pci=hpiosize=nnM parameters. For
- * some PCI-PCI hotplug bridges, like PLX 6254 (former HINT HB6),
- * kernel fails to allocate resources when hotplug device is
- * inserted and PCI bus is rescanned.
+/*
+ * Allow manual resource allocation for PCI hotplug bridges via
+ * pci=hpmemsize=nnM and pci=hpiosize=nnM parameters. For some PCI-PCI
+ * hotplug bridges, like PLX 6254 (former HINT HB6), kernel fails to
+ * allocate resources when hotplug device is inserted and PCI bus is
+ * rescanned.
*/
static void quirk_hotplug_bridge(struct pci_dev *dev)
{
dev->is_hotplug_bridge = 1;
}
-
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HINT, 0x0020, quirk_hotplug_bridge);
/*
- * This is a quirk for the Ricoh MMC controller found as a part of
- * some mulifunction chips.
-
+ * This is a quirk for the Ricoh MMC controller found as a part of some
+ * multifunction chips.
+ *
* This is very similar and based on the ricoh_mmc driver written by
* Philip Langdale. Thank you for these magic sequences.
*
- * These chips implement the four main memory card controllers (SD, MMC, MS, xD)
- * and one or both of cardbus or firewire.
+ * These chips implement the four main memory card controllers (SD, MMC,
+ * MS, xD) and one or both of CardBus or FireWire.
*
- * It happens that they implement SD and MMC
- * support as separate controllers (and PCI functions). The linux SDHCI
- * driver supports MMC cards but the chip detects MMC cards in hardware
- * and directs them to the MMC controller - so the SDHCI driver never sees
- * them.
+ * It happens that they implement SD and MMC support as separate
+ * controllers (and PCI functions). The Linux SDHCI driver supports MMC
+ * cards but the chip detects MMC cards in hardware and directs them to the
+ * MMC controller - so the SDHCI driver never sees them.
*
- * To get around this, we must disable the useless MMC controller.
- * At that point, the SDHCI controller will start seeing them
- * It seems to be the case that the relevant PCI registers to deactivate the
- * MMC controller live on PCI function 0, which might be the cardbus controller
- * or the firewire controller, depending on the particular chip in question
+ * To get around this, we must disable the useless MMC controller. At that
+ * point, the SDHCI controller will start seeing them. It seems to be the
+ * case that the relevant PCI registers to deactivate the MMC controller
+ * live on PCI function 0, which might be the CardBus controller or the
+ * FireWire controller, depending on the particular chip in question
*
* This has to be done early, because as soon as we disable the MMC controller
- * other pci functions shift up one level, e.g. function #2 becomes function
- * #1, and this will confuse the pci core.
+ * other PCI functions shift up one level, e.g. function #2 becomes function
+ * #1, and this will confuse the PCI core.
*/
-
#ifdef CONFIG_MMC_RICOH_MMC
static void ricoh_mmc_fixup_rl5c476(struct pci_dev *dev)
{
- /* disable via cardbus interface */
u8 write_enable;
u8 write_target;
u8 disable;
- /* disable must be done via function #0 */
+ /*
+ * Disable via CardBus interface
+ *
+ * This must be done via function #0
+ */
if (PCI_FUNC(dev->devfn))
return;
@@ -2933,7 +2938,7 @@ static void ricoh_mmc_fixup_rl5c476(struct pci_dev *dev)
pci_write_config_byte(dev, 0x8E, write_enable);
pci_write_config_byte(dev, 0x8D, write_target);
- pci_notice(dev, "proprietary Ricoh MMC controller disabled (via cardbus function)\n");
+ pci_notice(dev, "proprietary Ricoh MMC controller disabled (via CardBus function)\n");
pci_notice(dev, "MMC cards are now supported by standard SDHCI controller\n");
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476, ricoh_mmc_fixup_rl5c476);
@@ -2941,17 +2946,20 @@ DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476,
static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev)
{
- /* disable via firewire interface */
u8 write_enable;
u8 disable;
- /* disable must be done via function #0 */
+ /*
+ * Disable via FireWire interface
+ *
+ * This must be done via function #0
+ */
if (PCI_FUNC(dev->devfn))
return;
/*
* RICOH 0xe822 and 0xe823 SD/MMC card readers fail to recognize
- * certain types of SD/MMC cards. Lowering the SD base
- * clock frequency from 200Mhz to 50Mhz fixes this issue.
+ * certain types of SD/MMC cards. Lowering the SD base clock
+ * frequency from 200Mhz to 50Mhz fixes this issue.
*
* 0x150 - SD2.0 mode enable for changing base clock
* frequency to 50Mhz
@@ -2982,7 +2990,7 @@ static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev)
pci_write_config_byte(dev, 0xCB, disable | 0x02);
pci_write_config_byte(dev, 0xCA, write_enable);
- pci_notice(dev, "proprietary Ricoh MMC controller disabled (via firewire function)\n");
+ pci_notice(dev, "proprietary Ricoh MMC controller disabled (via FireWire function)\n");
pci_notice(dev, "MMC cards are now supported by standard SDHCI controller\n");
}
@@ -2998,13 +3006,13 @@ DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE823,
#define VTUNCERRMSK_REG 0x1ac
#define VTD_MSK_SPEC_ERRORS (1 << 31)
/*
- * This is a quirk for masking vt-d spec defined errors to platform error
- * handling logic. With out this, platforms using Intel 7500, 5500 chipsets
+ * This is a quirk for masking VT-d spec-defined errors to platform error
+ * handling logic. Without this, platforms using Intel 7500, 5500 chipsets
* (and the derivative chipsets like X58 etc) seem to generate NMI/SMI (based
- * on the RAS config settings of the platform) when a vt-d fault happens.
+ * on the RAS config settings of the platform) when a VT-d fault happens.
* The resulting SMI caused the system to hang.
*
- * VT-d spec related errors are already handled by the VT-d OS code, so no
+ * VT-d spec-related errors are already handled by the VT-d OS code, so no
* need to report the same error through other channels.
*/
static void vtd_mask_spec_errors(struct pci_dev *dev)
@@ -3030,7 +3038,8 @@ static void fixup_ti816x_class(struct pci_dev *dev)
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_TI, 0xb800,
PCI_CLASS_NOT_DEFINED, 8, fixup_ti816x_class);
-/* Some PCIe devices do not work reliably with the claimed maximum
+/*
+ * Some PCIe devices do not work reliably with the claimed maximum
* payload size supported.
*/
static void fixup_mpss_256(struct pci_dev *dev)
@@ -3044,9 +3053,10 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SOLARFLARE,
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SOLARFLARE,
PCI_DEVICE_ID_SOLARFLARE_SFC4000B, fixup_mpss_256);
-/* Intel 5000 and 5100 Memory controllers have an errata with read completion
+/*
+ * Intel 5000 and 5100 Memory controllers have an erratum with read completion
* coalescing (which is enabled by default on some BIOSes) and MPS of 256B.
- * Since there is no way of knowing what the PCIE MPS on each fabric will be
+ * Since there is no way of knowing what the PCIe MPS on each fabric will be
* until all of the devices are discovered and buses walked, read completion
* coalescing must be disabled. Unfortunately, it cannot be re-enabled because
* it is possible to hotplug a device with MPS of 256B.
@@ -3060,9 +3070,10 @@ static void quirk_intel_mc_errata(struct pci_dev *dev)
pcie_bus_config == PCIE_BUS_DEFAULT)
return;
- /* Intel errata specifies bits to change but does not say what they are.
- * Keeping them magical until such time as the registers and values can
- * be explained.
+ /*
+ * Intel erratum specifies bits to change but does not say what
+ * they are. Keeping them magical until such time as the registers
+ * and values can be explained.
*/
err = pci_read_config_word(dev, 0x48, &rcc);
if (err) {
@@ -3081,7 +3092,7 @@ static void quirk_intel_mc_errata(struct pci_dev *dev)
return;
}
- pr_info_once("Read completion coalescing disabled due to hardware errata relating to 256B MPS\n");
+ pr_info_once("Read completion coalescing disabled due to hardware erratum relating to 256B MPS\n");
}
/* Intel 5000 series memory controllers and ports 2-7 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x25c0, quirk_intel_mc_errata);
@@ -3111,11 +3122,10 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f8, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65f9, quirk_intel_mc_errata);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x65fa, quirk_intel_mc_errata);
-
/*
- * Ivytown NTB BAR sizes are misreported by the hardware due to an erratum. To
- * work around this, query the size it should be configured to by the device and
- * modify the resource end to correspond to this new size.
+ * Ivytown NTB BAR sizes are misreported by the hardware due to an erratum.
+ * To work around this, query the size it should be configured to by the
+ * device and modify the resource end to correspond to this new size.
*/
static void quirk_intel_ntb(struct pci_dev *dev)
{
@@ -3138,16 +3148,16 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0e08, quirk_intel_ntb);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0e0d, quirk_intel_ntb);
/*
- * Some BIOS implementations leave the Intel GPU interrupts enabled,
- * even though no one is handling them (f.e. i915 driver is never loaded).
- * Additionally the interrupt destination is not set up properly
+ * Some BIOS implementations leave the Intel GPU interrupts enabled, even
+ * though no one is handling them (e.g., if the i915 driver is never
+ * loaded). Additionally the interrupt destination is not set up properly
* and the interrupt ends up -somewhere-.
*
- * These spurious interrupts are "sticky" and the kernel disables
- * the (shared) interrupt line after 100.000+ generated interrupts.
+ * These spurious interrupts are "sticky" and the kernel disables the
+ * (shared) interrupt line after 100,000+ generated interrupts.
*
- * Fix it by disabling the still enabled interrupts.
- * This resolves crashes often seen on monitor unplug.
+ * Fix it by disabling the still enabled interrupts. This resolves crashes
+ * often seen on monitor unplug.
*/
#define I915_DEIER_REG 0x4400c
static void disable_igfx_irq(struct pci_dev *dev)
@@ -3235,38 +3245,22 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, 0x8169,
* Intel i40e (XL710/X710) 10/20/40GbE NICs all have broken INTx masking,
* DisINTx can be set but the interrupt status bit is non-functional.
*/
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1572,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1574,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1580,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1581,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1583,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1584,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1585,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1586,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1587,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1588,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1589,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158a,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158b,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d0,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d1,
- quirk_broken_intx_masking);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d2,
- quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1572, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1574, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1580, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1581, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1583, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1584, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1585, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1586, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1587, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1588, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1589, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158a, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x158b, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d0, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d1, quirk_broken_intx_masking);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x37d2, quirk_broken_intx_masking);
static u16 mellanox_broken_intx_devs[] = {
PCI_DEVICE_ID_MELLANOX_HERMON_SDR,
@@ -3311,7 +3305,8 @@ static void mellanox_check_broken_intx_masking(struct pci_dev *pdev)
}
}
- /* Getting here means Connect-IB cards and up. Connect-IB has no INTx
+ /*
+ * Getting here means Connect-IB cards and up. Connect-IB has no INTx
* support so shouldn't be checked further
*/
if (pdev->device == PCI_DEVICE_ID_MELLANOX_CONNECTIB)
@@ -3431,8 +3426,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
* shutdown before suspend. Otherwise the native host interface (NHI) will not
* be present after resume if a device was plugged in before suspend.
*
- * The thunderbolt controller consists of a pcie switch with downstream
- * bridges leading to the NHI and to the tunnel pci bridges.
+ * The Thunderbolt controller consists of a PCIe switch with downstream
+ * bridges leading to the NHI and to the tunnel PCI bridges.
*
* This quirk cuts power to the whole chip. Therefore we have to apply it
* during suspend_noirq of the upstream bridge.
@@ -3450,17 +3445,19 @@ static void quirk_apple_poweroff_thunderbolt(struct pci_dev *dev)
bridge = ACPI_HANDLE(&dev->dev);
if (!bridge)
return;
+
/*
* SXIO and SXLV are present only on machines requiring this quirk.
- * TB bridges in external devices might have the same device id as those
- * on the host, but they will not have the associated ACPI methods. This
- * implicitly checks that we are at the right bridge.
+ * Thunderbolt bridges in external devices might have the same
+ * device ID as those on the host, but they will not have the
+ * associated ACPI methods. This implicitly checks that we are at
+ * the right bridge.
*/
if (ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXIO", &SXIO))
|| ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXFP", &SXFP))
|| ACPI_FAILURE(acpi_get_handle(bridge, "DSB0.NHI0.SXLV", &SXLV)))
return;
- pci_info(dev, "quirk: cutting power to thunderbolt controller...\n");
+ pci_info(dev, "quirk: cutting power to Thunderbolt controller...\n");
/* magic sequence */
acpi_execute_simple_method(SXIO, NULL, 1);
@@ -3475,9 +3472,9 @@ DECLARE_PCI_FIXUP_SUSPEND_LATE(PCI_VENDOR_ID_INTEL,
quirk_apple_poweroff_thunderbolt);
/*
- * Apple: Wait for the thunderbolt controller to reestablish pci tunnels.
+ * Apple: Wait for the Thunderbolt controller to reestablish PCI tunnels
*
- * During suspend the thunderbolt controller is reset and all pci
+ * During suspend the Thunderbolt controller is reset and all PCI
* tunnels are lost. The NHI driver will try to reestablish all tunnels
* during resume. We have to manually wait for the NHI since there is
* no parent child relationship between the NHI and the tunneled
@@ -3492,9 +3489,10 @@ static void quirk_apple_wait_for_thunderbolt(struct pci_dev *dev)
return;
if (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)
return;
+
/*
- * Find the NHI and confirm that we are a bridge on the tb host
- * controller and not on a tb endpoint.
+ * Find the NHI and confirm that we are a bridge on the Thunderbolt
+ * host controller and not on a Thunderbolt endpoint.
*/
sibling = pci_get_slot(dev->bus, 0x0);
if (sibling == dev)
@@ -3511,7 +3509,7 @@ static void quirk_apple_wait_for_thunderbolt(struct pci_dev *dev)
nhi->device != PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI)
|| nhi->class != PCI_CLASS_SYSTEM_OTHER << 8)
goto out;
- pci_info(dev, "quirk: waiting for thunderbolt to reestablish PCI tunnels...\n");
+ pci_info(dev, "quirk: waiting for Thunderbolt to reestablish PCI tunnels...\n");
device_pm_wait_for_dev(&dev->dev, &nhi->dev);
out:
pci_dev_put(nhi);
@@ -3600,9 +3598,7 @@ reset_complete:
return 0;
}
-/*
- * Device-specific reset method for Chelsio T4-based adapters.
- */
+/* Device-specific reset method for Chelsio T4-based adapters */
static int reset_chelsio_generic_dev(struct pci_dev *dev, int probe)
{
u16 old_command;
@@ -3885,7 +3881,7 @@ DECLARE_PCI_FIXUP_CLASS_EARLY(0x1797, 0x6869, PCI_CLASS_NOT_DEFINED, 8,
/*
* Some devices have problems with Transaction Layer Packets with the Relaxed
* Ordering Attribute set. Such devices should mark themselves and other
- * Device Drivers should check before sending TLPs with RO set.
+ * device drivers should check before sending TLPs with RO set.
*/
static void quirk_relaxedordering_disable(struct pci_dev *dev)
{
@@ -3895,7 +3891,7 @@ static void quirk_relaxedordering_disable(struct pci_dev *dev)
/*
* Intel Xeon processors based on Broadwell/Haswell microarchitecture Root
- * Complex has a Flow Control Credit issue which can cause performance
+ * Complex have a Flow Control Credit issue which can cause performance
* problems with Upstream Transaction Layer Packets with Relaxed Ordering set.
*/
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x6f01, PCI_CLASS_NOT_DEFINED, 8,
@@ -3956,7 +3952,7 @@ DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, 0x2f0e, PCI_CLASS_NOT_DEFINED
quirk_relaxedordering_disable);
/*
- * The AMD ARM A1100 (AKA "SEATTLE") SoC has a bug in its PCIe Root Complex
+ * The AMD ARM A1100 (aka "SEATTLE") SoC has a bug in its PCIe Root Complex
* where Upstream Transaction Layer Packets with the Relaxed Ordering
* Attribute clear are allowed to bypass earlier TLPs with Relaxed Ordering
* set. This is a violation of the PCIe 3.0 Transaction Ordering Rules
@@ -4020,7 +4016,7 @@ static void quirk_chelsio_T5_disable_root_port_attributes(struct pci_dev *pdev)
* This mask/compare operation selects for Physical Function 4 on a
* T5. We only need to fix up the Root Port once for any of the
* PFs. PF[0..3] have PCI Device IDs of 0x50xx, but PF4 is uniquely
- * 0x54xx so we use that one,
+ * 0x54xx so we use that one.
*/
if ((pdev->device & 0xff00) == 0x5400)
quirk_disable_root_port_attributes(pdev);
@@ -4111,7 +4107,7 @@ static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags)
static int pci_quirk_xgene_acs(struct pci_dev *dev, u16 acs_flags)
{
/*
- * X-Gene root matching this quirk do not allow peer-to-peer
+ * X-Gene Root Ports matching this quirk do not allow peer-to-peer
* transactions with others, allowing masking out these bits as if they
* were unimplemented in the ACS capability.
*/
@@ -4434,7 +4430,7 @@ static int pci_quirk_enable_intel_lpc_acs(struct pci_dev *dev)
/*
* Read the RCBA register from the LPC (D31:F0). PCH root ports
* are D28:F* and therefore get probed before LPC, thus we can't
- * use pci_get_slot/pci_read_config_dword here.
+ * use pci_get_slot()/pci_read_config_dword() here.
*/
pci_bus_read_config_dword(dev->bus, PCI_DEVFN(31, 0),
INTEL_LPC_RCBA_REG, &rcba);
@@ -4567,7 +4563,7 @@ int pci_dev_specific_enable_acs(struct pci_dev *dev)
}
/*
- * The PCI capabilities list for Intel DH895xCC VFs (device id 0x0443) with
+ * The PCI capabilities list for Intel DH895xCC VFs (device ID 0x0443) with
* QuickAssist Technology (QAT) is prematurely terminated in hardware. The
* Next Capability pointer in the MSI Capability Structure should point to
* the PCIe Capability Structure but is incorrectly hardwired as 0 terminating
@@ -4628,9 +4624,7 @@ static void quirk_intel_qat_vf_cap(struct pci_dev *pdev)
if (pci_find_saved_cap(pdev, PCI_CAP_ID_EXP))
return;
- /*
- * Save PCIE cap
- */
+ /* Save PCIe cap */
state = kzalloc(sizeof(*state) + size, GFP_KERNEL);
if (!state)
return;
@@ -4651,7 +4645,7 @@ static void quirk_intel_qat_vf_cap(struct pci_dev *pdev)
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x443, quirk_intel_qat_vf_cap);
-/* FLR may cause some 82579 devices to hang. */
+/* FLR may cause some 82579 devices to hang */
static void quirk_intel_no_flr(struct pci_dev *dev)
{
dev->dev_flags |= PCI_DEV_FLAGS_NO_FLR_RESET;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 16:12:37 +0000