nagai/kernel
3
0
Fork 0
forked from mirrors/linux
Code Pull requests Activity

ACPI: fix two IRQ8 issues in IOAPIC mode

Browse source 
Use mp_irqs[] to get PNP device's interrupt polarity and trigger.
There are two reasons to do this:
1. BIOS bug for PNP interrupt
2. BIOS explictly does override
mp_irqs[] should cover all the cases.

http://bugzilla.kernel.org/show_bug.cgi?id=5243
http://bugzilla.kernel.org/show_bug.cgi?id=7679
http://bugzilla.kernel.org/show_bug.cgi?id=9153

[lenb: fixed !IOAPIC and 64-bit !SMP builds]

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Shaohua Li 2007-11-17 01:05:28 -05:00 committed by Len Brown
parent f0714d2023
commit 61fd47e0c8
4 changed files with 65 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

21
arch/x86/kernel/io_apic_32.c
View file

@ -962,7 +962,7 @@ static int EISA_ELCR(unsigned int irq)
#define default_MCA_trigger(idx) (1)
#define default_MCA_polarity(idx) (0)
static int __init MPBIOS_polarity(int idx)
static int MPBIOS_polarity(int idx)
{
int bus = mp_irqs[idx].mpc_srcbus;
int polarity;
@ -2830,6 +2830,25 @@ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int a
return 0;
}
int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
{
int i;
if (skip_ioapic_setup)
return -1;
for (i = 0; i < mp_irq_entries; i++)
if (mp_irqs[i].mpc_irqtype == mp_INT &&
mp_irqs[i].mpc_srcbusirq == bus_irq)
break;
if (i >= mp_irq_entries)
return -1;
*trigger = irq_trigger(i);
*polarity = irq_polarity(i);
return 0;
}
#endif /* CONFIG_ACPI */
static int __init parse_disable_timer_pin_1(char *arg)

24
arch/x86/kernel/io_apic_64.c
View file

@ -546,7 +546,7 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin)
#define default_PCI_trigger(idx) (1)
#define default_PCI_polarity(idx) (1)
static int __init MPBIOS_polarity(int idx)
static int MPBIOS_polarity(int idx)
{
int bus = mp_irqs[idx].mpc_srcbus;
int polarity;
@ -2222,8 +2222,27 @@ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int p
return 0;
}
#endif /* CONFIG_ACPI */
int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
{
int i;
if (skip_ioapic_setup)
return -1;
for (i = 0; i < mp_irq_entries; i++)
if (mp_irqs[i].mpc_irqtype == mp_INT &&
mp_irqs[i].mpc_srcbusirq == bus_irq)
break;
if (i >= mp_irq_entries)
return -1;
*trigger = irq_trigger(i);
*polarity = irq_polarity(i);
return 0;
}
#endif /* CONFIG_ACPI */
/*
* This function currently is only a helper for the i386 smp boot process where
@ -2260,3 +2279,4 @@ void __init setup_ioapic_dest(void)
}
}
#endif

18
drivers/pnp/pnpacpi/rsparser.c
View file

@ -75,6 +75,7 @@ static void pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res,
{
int i = 0;
int irq;
int p, t;
if (!valid_IRQ(gsi))
return;
@ -85,6 +86,23 @@ static void pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res,
if (i >= PNP_MAX_IRQ)
return;
/*
* in IO-APIC mode, use overrided attribute. Two reasons:
* 1. BIOS bug in DSDT
* 2. BIOS uses IO-APIC mode Interrupt Source Override
*/
if (!acpi_get_override_irq(gsi, &t, &p)) {
t = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
p = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
if (triggering != t || polarity != p) {
pnp_warn("IRQ %d override to %s, %s",
gsi, t ? "edge":"level", p ? "low":"high");
triggering = t;
polarity = p;
}
}
res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
res->irq_resource[i].flags |= irq_flags(triggering, polarity);
irq = acpi_register_gsi(gsi, triggering, polarity);

5
include/linux/acpi.h
View file

@ -132,6 +132,11 @@ extern unsigned long acpi_realmode_flags;
int acpi_register_gsi (u32 gsi, int triggering, int polarity);
int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
#ifdef CONFIG_X86_IO_APIC
extern int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity);
#else
#define acpi_get_override_irq(bus, trigger, polarity) (-1)
#endif
/*
* This function undoes the effect of one call to acpi_register_gsi().
* If this matches the last registration, any IRQ resources for gsi