[ACPI] Merge acpi-2.6.12 branch into 2.6.13-rc3

[linux-2.6.git] / drivers / acpi / pci_irq.c

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index d1f42b9728214cb31a7a2584b802325029d3fed5..c885300579eca17059688b47a115af937ad721ae 100644 (file)
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -269,7 +269,51 @@ acpi_pci_irq_del_prt (int segment, int bus)
 /* --------------------------------------------------------------------------
                           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
@@ -282,12 +326,13 @@ acpi_pci_irq_lookup (
        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");
 
@@ -301,22 +346,8 @@ 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);
 }
 
 /*
@@ -330,7 +361,8 @@ acpi_pci_irq_derive (
        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;
@@ -363,7 +395,7 @@ acpi_pci_irq_derive (
                }
 
                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) {
@@ -392,6 +424,7 @@ acpi_pci_irq_enable (
        int                     edge_level = ACPI_LEVEL_SENSITIVE;
        int                     active_high_low = ACPI_ACTIVE_LOW;
        char                    *link = NULL;
+       int                     rc;
 
        ACPI_FUNCTION_TRACE("acpi_pci_irq_enable");
 
@@ -415,7 +448,7 @@ acpi_pci_irq_enable (
         * 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
@@ -423,7 +456,7 @@ acpi_pci_irq_enable (
         */
        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 / 
@@ -444,7 +477,13 @@ acpi_pci_irq_enable (
                }
        }
 
-       dev->irq = acpi_register_gsi(irq, edge_level, active_high_low);
+       rc = acpi_register_gsi(irq, edge_level, active_high_low);
+       if (rc < 0) {
+               printk(KERN_WARNING PREFIX "PCI Interrupt %s[%c]: failed "
+                      "to register GSI\n", pci_name(dev), ('A' + pin));
+               return_VALUE(rc);
+       }
+       dev->irq = rc;
 
        printk(KERN_INFO PREFIX "PCI Interrupt %s[%c] -> ",
                pci_name(dev), 'A' + pin);
@@ -462,7 +501,9 @@ acpi_pci_irq_enable (
 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)
@@ -489,14 +530,14 @@ acpi_pci_irq_disable (
         * 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;
 
@@ -512,4 +553,3 @@ acpi_pci_irq_disable (
 
        return_VOID;
 }
-#endif /* CONFIG_ACPI_DEALLOCATE_IRQ */