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Message-Id: <20070921204448.5E0EB14EFF@wotan.suse.de>
Date: Fri, 21 Sep 2007 22:44:48 +0200 (CEST)
From: Andi Kleen <ak@...e.de>
To: patches@...-64.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [7/45] x86_64: Replace nvidia timer override quirk with pci id list and unify quirks
This replaces the old NF3/NF4 reference BIOS timer override quirk with a device
ID list. We need to ignore the timer override on these systems, but not
ignore it on NF5 based systems. Previously this was distingushed by checking
for HPET, but a lot of BIOS vendors didn't enable HPET in their pre Vista BIOSes.
Replace the old "for all of nvidia" quirk with a quirk containing pci device
ID. I goobled this list together from pci.ids and googling and it may be incomplete.
I'm still not 100% sure the list is correct, but the only way
to find out is to do testing in mainline. So let's do that.
Signed-off-by: Andi Kleen <ak@...e.de>
---
arch/x86_64/kernel/early-quirks.c | 50 ++++++++++++++++++--------------------
1 file changed, 24 insertions(+), 26 deletions(-)
Index: linux/arch/x86_64/kernel/early-quirks.c
===================================================================
--- linux.orig/arch/x86_64/kernel/early-quirks.c
+++ linux/arch/x86_64/kernel/early-quirks.c
@@ -33,36 +33,20 @@ static void __init via_bugs(void)
#endif
}
-#ifdef CONFIG_ACPI
-
-static int __init nvidia_hpet_check(struct acpi_table_header *header)
-{
- return 0;
-}
-#endif
-
static void __init nvidia_bugs(void)
{
#ifdef CONFIG_ACPI
#ifdef CONFIG_X86_IO_APIC
/*
- * All timer overrides on Nvidia are
- * wrong unless HPET is enabled.
- * Unfortunately that's not true on many Asus boards.
- * We don't know yet how to detect this automatically, but
- * at least allow a command line override.
+ * All timer overrides on Nvidia NF3/NF4 are
+ * wrong.
*/
if (acpi_use_timer_override)
return;
- if (acpi_table_parse(ACPI_SIG_HPET, nvidia_hpet_check)) {
- acpi_skip_timer_override = 1;
- printk(KERN_INFO "Nvidia board "
- "detected. Ignoring ACPI "
- "timer override.\n");
- printk(KERN_INFO "If you got timer trouble "
- "try acpi_use_timer_override\n");
- }
+ acpi_skip_timer_override = 1;
+ printk(KERN_INFO "Nvidia board detected. Ignoring ACPI timer override.\n");
+ printk(KERN_INFO "If you got timer trouble try acpi_use_timer_override\n");
#endif
#endif
/* RED-PEN skip them on mptables too? */
@@ -83,10 +67,19 @@ static void __init ati_bugs(void)
struct chipset {
u16 vendor;
void (*f)(void);
+ int id;
};
static struct chipset early_qrk[] __initdata = {
- { PCI_VENDOR_ID_NVIDIA, nvidia_bugs },
+ /* This list should cover at least one PCI ID from each NF3 or NF4
+ mainboard to handle a bug in their reference BIOS. May be incomplete. */
+ { PCI_VENDOR_ID_NVIDIA, nvidia_bugs, 0x00dd }, /* nforce 3 */
+ { PCI_VENDOR_ID_NVIDIA, nvidia_bugs, 0x00e1 }, /* nforce 3 */
+ { PCI_VENDOR_ID_NVIDIA, nvidia_bugs, 0x00ed }, /* nforce 3 */
+ { PCI_VENDOR_ID_NVIDIA, nvidia_bugs, 0x003d }, /* mcp 04 ?? */
+ { PCI_VENDOR_ID_NVIDIA, nvidia_bugs, 0x005c }, /* ck 804 */
+ { PCI_VENDOR_ID_NVIDIA, nvidia_bugs, 0x026f }, /* mcp 51 / nf4 ? */
+ { PCI_VENDOR_ID_NVIDIA, nvidia_bugs, 0x02f0 }, /* mcp 51 / nf4 ? */
{ PCI_VENDOR_ID_VIA, via_bugs },
{ PCI_VENDOR_ID_ATI, ati_bugs },
{}
@@ -99,12 +92,13 @@ void __init early_quirks(void)
if (!early_pci_allowed())
return;
- /* Poor man's PCI discovery */
+ /* Poor man's PCI discovery.
+ We just look for a chipset unique PCI bridge; not scan all devices */
for (num = 0; num < 32; num++) {
for (slot = 0; slot < 32; slot++) {
for (func = 0; func < 8; func++) {
u32 class;
- u32 vendor;
+ u32 vendor, device;
u8 type;
int i;
class = read_pci_config(num,slot,func,
@@ -117,13 +111,17 @@ void __init early_quirks(void)
vendor = read_pci_config(num, slot, func,
PCI_VENDOR_ID);
+ device = vendor >> 16;
+
vendor &= 0xffff;
- for (i = 0; early_qrk[i].f; i++)
- if (early_qrk[i].vendor == vendor) {
+ for (i = 0; early_qrk[i].f; i++) {
+ struct chipset *c = &early_qrk[i];
+ if (c->vendor == vendor && (!c->id || (c->id && c->id==device))) {
early_qrk[i].f();
return;
}
+ }
type = read_pci_config_byte(num, slot, func,
PCI_HEADER_TYPE);
-
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