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Diffstat (limited to 'arch/x86/kernel/acpi/boot.c')
-rw-r--r--arch/x86/kernel/acpi/boot.c133
1 files changed, 85 insertions, 48 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index cd40aba6aa95..9a5ed58f09dc 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -94,6 +94,53 @@ enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
/*
+ * ISA irqs by default are the first 16 gsis but can be
+ * any gsi as specified by an interrupt source override.
+ */
+static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
+};
+
+static unsigned int gsi_to_irq(unsigned int gsi)
+{
+ unsigned int irq = gsi + NR_IRQS_LEGACY;
+ unsigned int i;
+
+ for (i = 0; i < NR_IRQS_LEGACY; i++) {
+ if (isa_irq_to_gsi[i] == gsi) {
+ return i;
+ }
+ }
+
+ /* Provide an identity mapping of gsi == irq
+ * except on truly weird platforms that have
+ * non isa irqs in the first 16 gsis.
+ */
+ if (gsi >= NR_IRQS_LEGACY)
+ irq = gsi;
+ else
+ irq = gsi_end + 1 + gsi;
+
+ return irq;
+}
+
+static u32 irq_to_gsi(int irq)
+{
+ unsigned int gsi;
+
+ if (irq < NR_IRQS_LEGACY)
+ gsi = isa_irq_to_gsi[irq];
+ else if (irq <= gsi_end)
+ gsi = irq;
+ else if (irq <= (gsi_end + NR_IRQS_LEGACY))
+ gsi = irq - gsi_end;
+ else
+ gsi = 0xffffffff;
+
+ return gsi;
+}
+
+/*
* Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
* to map the target physical address. The problem is that set_fixmap()
* provides a single page, and it is possible that the page is not
@@ -313,7 +360,7 @@ acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
/*
* Parse Interrupt Source Override for the ACPI SCI
*/
-static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
+static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
{
if (trigger == 0) /* compatible SCI trigger is level */
trigger = 3;
@@ -333,7 +380,7 @@ static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
* If GSI is < 16, this will update its flags,
* else it will create a new mp_irqs[] entry.
*/
- mp_override_legacy_irq(gsi, polarity, trigger, gsi);
+ mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
/*
* stash over-ride to indicate we've been here
@@ -357,9 +404,10 @@ acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
acpi_table_print_madt_entry(header);
if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
- acpi_sci_ioapic_setup(intsrc->global_irq,
+ acpi_sci_ioapic_setup(intsrc->source_irq,
intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
- (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
+ (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
+ intsrc->global_irq);
return 0;
}
@@ -448,7 +496,7 @@ void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
{
- *irq = gsi;
+ *irq = gsi_to_irq(gsi);
#ifdef CONFIG_X86_IO_APIC
if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
@@ -458,6 +506,14 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
return 0;
}
+int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
+{
+ if (isa_irq >= 16)
+ return -1;
+ *gsi = irq_to_gsi(isa_irq);
+ return 0;
+}
+
/*
* success: return IRQ number (>=0)
* failure: return < 0
@@ -482,7 +538,7 @@ int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
}
#endif
- irq = plat_gsi;
+ irq = gsi_to_irq(plat_gsi);
return irq;
}
@@ -867,29 +923,6 @@ static int __init acpi_parse_madt_lapic_entries(void)
extern int es7000_plat;
#endif
-int __init acpi_probe_gsi(void)
-{
- int idx;
- int gsi;
- int max_gsi = 0;
-
- if (acpi_disabled)
- return 0;
-
- if (!acpi_ioapic)
- return 0;
-
- max_gsi = 0;
- for (idx = 0; idx < nr_ioapics; idx++) {
- gsi = mp_gsi_routing[idx].gsi_end;
-
- if (gsi > max_gsi)
- max_gsi = gsi;
- }
-
- return max_gsi + 1;
-}
-
static void assign_to_mp_irq(struct mpc_intsrc *m,
struct mpc_intsrc *mp_irq)
{
@@ -947,13 +980,13 @@ void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
mp_irq.dstirq = pin; /* INTIN# */
save_mp_irq(&mp_irq);
+
+ isa_irq_to_gsi[bus_irq] = gsi;
}
void __init mp_config_acpi_legacy_irqs(void)
{
int i;
- int ioapic;
- unsigned int dstapic;
struct mpc_intsrc mp_irq;
#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
@@ -974,19 +1007,27 @@ void __init mp_config_acpi_legacy_irqs(void)
#endif
/*
- * Locate the IOAPIC that manages the ISA IRQs (0-15).
- */
- ioapic = mp_find_ioapic(0);
- if (ioapic < 0)
- return;
- dstapic = mp_ioapics[ioapic].apicid;
-
- /*
* Use the default configuration for the IRQs 0-15. Unless
* overridden by (MADT) interrupt source override entries.
*/
for (i = 0; i < 16; i++) {
+ int ioapic, pin;
+ unsigned int dstapic;
int idx;
+ u32 gsi;
+
+ /* Locate the gsi that irq i maps to. */
+ if (acpi_isa_irq_to_gsi(i, &gsi))
+ continue;
+
+ /*
+ * Locate the IOAPIC that manages the ISA IRQ.
+ */
+ ioapic = mp_find_ioapic(gsi);
+ if (ioapic < 0)
+ continue;
+ pin = mp_find_ioapic_pin(ioapic, gsi);
+ dstapic = mp_ioapics[ioapic].apicid;
for (idx = 0; idx < mp_irq_entries; idx++) {
struct mpc_intsrc *irq = mp_irqs + idx;
@@ -996,7 +1037,7 @@ void __init mp_config_acpi_legacy_irqs(void)
break;
/* Do we already have a mapping for this IOAPIC pin */
- if (irq->dstapic == dstapic && irq->dstirq == i)
+ if (irq->dstapic == dstapic && irq->dstirq == pin)
break;
}
@@ -1011,7 +1052,7 @@ void __init mp_config_acpi_legacy_irqs(void)
mp_irq.dstapic = dstapic;
mp_irq.irqtype = mp_INT;
mp_irq.srcbusirq = i; /* Identity mapped */
- mp_irq.dstirq = i;
+ mp_irq.dstirq = pin;
save_mp_irq(&mp_irq);
}
@@ -1076,11 +1117,6 @@ int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
-#ifdef CONFIG_X86_32
- if (ioapic_renumber_irq)
- gsi = ioapic_renumber_irq(ioapic, gsi);
-#endif
-
if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
printk(KERN_ERR "Invalid reference to IOAPIC pin "
"%d-%d\n", mp_ioapics[ioapic].apicid,
@@ -1094,7 +1130,7 @@ int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
- io_apic_set_pci_routing(dev, gsi, &irq_attr);
+ io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
return gsi;
}
@@ -1154,7 +1190,8 @@ static int __init acpi_parse_madt_ioapic_entries(void)
* pretend we got one so we can set the SCI flags.
*/
if (!acpi_sci_override_gsi)
- acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
+ acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
+ acpi_gbl_FADT.sci_interrupt);
/* Fill in identity legacy mappings where no override */
mp_config_acpi_legacy_irqs();
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-25 10:40:50 +0300