/* --------------------------------------------------------------------------
PCI Interrupt Routing Support
-------------------------------------------------------------------------- */
+typedef int (*irq_lookup_func)(struct acpi_prt_entry *, int *, int *, char **);
+static int
+acpi_pci_allocate_irq(struct acpi_prt_entry *entry,
+ int *edge_level,
+ int *active_high_low,
+ char **link)
+{
+ int irq;
+
+ ACPI_FUNCTION_TRACE("acpi_pci_allocate_irq");
+
+ if (entry->link.handle) {
+ irq = acpi_pci_link_allocate_irq(entry->link.handle,
+ entry->link.index, edge_level, active_high_low, link);
+ if (irq < 0) {
+ ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid IRQ link routing entry\n"));
+ return_VALUE(-1);
+ }
+ } else {
+ irq = entry->link.index;
+ *edge_level = ACPI_LEVEL_SENSITIVE;
+ *active_high_low = ACPI_ACTIVE_LOW;
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found IRQ %d\n", irq));
+ return_VALUE(irq);
+}
+
+static int
+acpi_pci_free_irq(struct acpi_prt_entry *entry,
+ int *edge_level,
+ int *active_high_low,
+ char **link)
+{
+ int irq;
+
+ ACPI_FUNCTION_TRACE("acpi_pci_free_irq");
+ if (entry->link.handle) {
+ irq = acpi_pci_link_free_irq(entry->link.handle);
+ } else {
+ irq = entry->link.index;
+ }
+ return_VALUE(irq);
+}
/*
* acpi_pci_irq_lookup
* success: return IRQ >= 0
int pin,
int *edge_level,
int *active_high_low,
- char **link)
+ char **link,
+ irq_lookup_func func)
{
struct acpi_prt_entry *entry = NULL;
int segment = pci_domain_nr(bus);
int bus_nr = bus->number;
- int irq;
+ int ret;
ACPI_FUNCTION_TRACE("acpi_pci_irq_lookup");
return_VALUE(-1);
}
- if (entry->link.handle) {
- irq = acpi_pci_link_get_irq(entry->link.handle,
- entry->link.index, edge_level, active_high_low, link);
- if (irq < 0) {
- ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid IRQ link routing entry\n"));
- return_VALUE(-1);
- }
- } else {
- irq = entry->link.index;
- *edge_level = ACPI_LEVEL_SENSITIVE;
- *active_high_low = ACPI_ACTIVE_LOW;
- }
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found IRQ %d\n", irq));
-
- return_VALUE(irq);
+ ret = func(entry, edge_level, active_high_low, link);
+ return_VALUE(ret);
}
/*
int pin,
int *edge_level,
int *active_high_low,
- char **link)
+ char **link,
+ irq_lookup_func func)
{
struct pci_dev *bridge = dev;
int irq = -1;
}
irq = acpi_pci_irq_lookup(bridge->bus, PCI_SLOT(bridge->devfn),
- pin, edge_level, active_high_low, link);
+ pin, edge_level, active_high_low, link, func);
}
if (irq < 0) {
* values override any BIOS-assigned IRQs set during boot.
*/
irq = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin,
- &edge_level, &active_high_low, &link);
+ &edge_level, &active_high_low, &link, acpi_pci_allocate_irq);
/*
* If no PRT entry was found, we'll try to derive an IRQ from the
*/
if (irq < 0)
irq = acpi_pci_irq_derive(dev, pin, &edge_level,
- &active_high_low, &link);
+ &active_high_low, &link, acpi_pci_allocate_irq);
/*
* No IRQ known to the ACPI subsystem - maybe the BIOS /
printk(KERN_WARNING PREFIX "PCI Interrupt %s[%c]: no GSI",
pci_name(dev), ('A' + pin));
/* Interrupt Line values above 0xF are forbidden */
- if (dev->irq >= 0 && (dev->irq <= 0xF)) {
+ if (dev->irq > 0 && (dev->irq <= 0xF)) {
printk(" - using IRQ %d\n", dev->irq);
+ acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
return_VALUE(0);
}
else {
EXPORT_SYMBOL(acpi_pci_irq_enable);
-#ifdef CONFIG_ACPI_DEALLOCATE_IRQ
+/* FIXME: implement x86/x86_64 version */
+void __attribute__((weak)) acpi_unregister_gsi(u32 i) {}
+
void
acpi_pci_irq_disable (
struct pci_dev *dev)
* First we check the PCI IRQ routing table (PRT) for an IRQ.
*/
gsi = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin,
- &edge_level, &active_high_low, NULL);
+ &edge_level, &active_high_low, NULL, acpi_pci_free_irq);
/*
* If no PRT entry was found, we'll try to derive an IRQ from the
* device's parent bridge.
*/
if (gsi < 0)
gsi = acpi_pci_irq_derive(dev, pin,
- &edge_level, &active_high_low, NULL);
+ &edge_level, &active_high_low, NULL, acpi_pci_free_irq);
if (gsi < 0)
return_VOID;
return_VOID;
}
-#endif /* CONFIG_ACPI_DEALLOCATE_IRQ */