*/
+#include <linux/dmi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
return NULL;
}
+/* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */
+static struct dmi_system_id medion_md9580[] = {
+ {
+ .ident = "Medion MD9580-F laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "A555"),
+ },
+ },
+ { }
+};
+
+/* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */
+static struct dmi_system_id dell_optiplex[] = {
+ {
+ .ident = "Dell Optiplex GX1",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"),
+ },
+ },
+ { }
+};
+
+/* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */
+static struct dmi_system_id hp_t5710[] = {
+ {
+ .ident = "HP t5710",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"),
+ DMI_MATCH(DMI_BOARD_NAME, "098Ch"),
+ },
+ },
+ { }
+};
+
+struct prt_quirk {
+ struct dmi_system_id *system;
+ unsigned int segment;
+ unsigned int bus;
+ unsigned int device;
+ unsigned char pin;
+ char *source; /* according to BIOS */
+ char *actual_source;
+};
+
+/*
+ * These systems have incorrect _PRT entries. The BIOS claims the PCI
+ * interrupt at the listed segment/bus/device/pin is connected to the first
+ * link device, but it is actually connected to the second.
+ */
+static struct prt_quirk prt_quirks[] = {
+ { medion_md9580, 0, 0, 9, 'A',
+ "\\_SB_.PCI0.ISA_.LNKA",
+ "\\_SB_.PCI0.ISA_.LNKB"},
+ { dell_optiplex, 0, 0, 0xd, 'A',
+ "\\_SB_.LNKB",
+ "\\_SB_.LNKA"},
+ { hp_t5710, 0, 0, 1, 'A',
+ "\\_SB_.PCI0.LNK1",
+ "\\_SB_.PCI0.LNK3"},
+};
+
+static void
+do_prt_fixups(struct acpi_prt_entry *entry, struct acpi_pci_routing_table *prt)
+{
+ int i;
+ struct prt_quirk *quirk;
+
+ for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) {
+ quirk = &prt_quirks[i];
+
+ /* All current quirks involve link devices, not GSIs */
+ if (!prt->source)
+ continue;
+
+ if (dmi_check_system(quirk->system) &&
+ entry->id.segment == quirk->segment &&
+ entry->id.bus == quirk->bus &&
+ entry->id.device == quirk->device &&
+ entry->pin + 'A' == quirk->pin &&
+ !strcmp(prt->source, quirk->source) &&
+ strlen(prt->source) >= strlen(quirk->actual_source)) {
+ printk(KERN_WARNING PREFIX "firmware reports "
+ "%04x:%02x:%02x[%c] connected to %s; "
+ "changing to %s\n",
+ entry->id.segment, entry->id.bus,
+ entry->id.device, 'A' + entry->pin,
+ prt->source, quirk->actual_source);
+ strcpy(prt->source, quirk->actual_source);
+ }
+ }
+}
+
static int
acpi_pci_irq_add_entry(acpi_handle handle,
int segment, int bus, struct acpi_pci_routing_table *prt)
entry->id.function = prt->address & 0xFFFF;
entry->pin = prt->pin;
+ do_prt_fixups(entry, prt);
+
/*
* Type 1: Dynamic
* ---------------
return irq;
}
+#ifdef CONFIG_X86_IO_APIC
+extern int noioapicquirk;
+
+static int bridge_has_boot_interrupt_variant(struct pci_bus *bus)
+{
+ struct pci_bus *bus_it;
+
+ for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) {
+ if (!bus_it->self)
+ return 0;
+
+ printk(KERN_INFO "vendor=%04x device=%04x\n", bus_it->self->vendor,
+ bus_it->self->device);
+
+ if (bus_it->self->irq_reroute_variant)
+ return bus_it->self->irq_reroute_variant;
+ }
+ return 0;
+}
+#endif /* CONFIG_X86_IO_APIC */
+
/*
* acpi_pci_irq_lookup
* success: return IRQ >= 0
}
ret = func(entry, triggering, polarity, link);
+
+#ifdef CONFIG_X86_IO_APIC
+ /*
+ * Some chipsets (e.g. intel 6700PXH) generate a legacy INTx when the
+ * IRQ entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel
+ * does during interrupt handling). When this INTx generation cannot be
+ * disabled, we reroute these interrupts to their legacy equivalent to
+ * get rid of spurious interrupts.
+ */
+ if (!noioapicquirk) {
+ switch (bridge_has_boot_interrupt_variant(bus)) {
+ case 0:
+ /* no rerouting necessary */
+ break;
+
+ case INTEL_IRQ_REROUTE_VARIANT:
+ /*
+ * Remap according to INTx routing table in 6700PXH
+ * specs, intel order number 302628-002, section
+ * 2.15.2. Other chipsets (80332, ...) have the same
+ * mapping and are handled here as well.
+ */
+ printk(KERN_INFO "pci irq %d -> rerouted to legacy "
+ "irq %d\n", ret, (ret % 4) + 16);
+ ret = (ret % 4) + 16;
+ break;
+
+ default:
+ printk(KERN_INFO "not rerouting irq %d to legacy irq: "
+ "unknown mapping\n", ret);
+ break;
+ }
+ }
+#endif /* CONFIG_X86_IO_APIC */
+
return ret;
}