* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (C) 2002 Dominik Brodowski <devel@brodo.de>
+ * (c) Copyright 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
-#include <linux/config.h>
+#include <linux/dmi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pm.h>
#include <linux/pci.h>
#include <linux/acpi.h>
+#include <linux/slab.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
+#define PREFIX "ACPI: "
+
#define _COMPONENT ACPI_PCI_COMPONENT
-ACPI_MODULE_NAME("pci_irq")
+ACPI_MODULE_NAME("pci_irq");
+
+struct acpi_prt_entry {
+ struct list_head list;
+ struct acpi_pci_id id;
+ u8 pin;
+ acpi_handle link;
+ u32 index; /* GSI, or link _CRS index */
+};
-static struct acpi_prt_list acpi_prt;
+static LIST_HEAD(acpi_prt_list);
static DEFINE_SPINLOCK(acpi_prt_lock);
+static inline char pin_name(int pin)
+{
+ return 'A' + pin - 1;
+}
+
/* --------------------------------------------------------------------------
PCI IRQ Routing Table (PRT) Support
-------------------------------------------------------------------------- */
-static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(int segment,
- int bus,
- int device, int pin)
+static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev,
+ int pin)
{
- struct list_head *node = NULL;
- struct acpi_prt_entry *entry = NULL;
-
- ACPI_FUNCTION_TRACE("acpi_pci_irq_find_prt_entry");
-
- if (!acpi_prt.count)
- return_PTR(NULL);
+ struct acpi_prt_entry *entry;
+ int segment = pci_domain_nr(dev->bus);
+ int bus = dev->bus->number;
+ int device = PCI_SLOT(dev->devfn);
- /*
- * Parse through all PRT entries looking for a match on the specified
- * PCI device's segment, bus, device, and pin (don't care about func).
- *
- */
spin_lock(&acpi_prt_lock);
- list_for_each(node, &acpi_prt.entries) {
- entry = list_entry(node, struct acpi_prt_entry, node);
+ list_for_each_entry(entry, &acpi_prt_list, list) {
if ((segment == entry->id.segment)
&& (bus == entry->id.bus)
&& (device == entry->id.device)
&& (pin == entry->pin)) {
spin_unlock(&acpi_prt_lock);
- return_PTR(entry);
+ return entry;
}
}
-
spin_unlock(&acpi_prt_lock);
- return_PTR(NULL);
+ return NULL;
}
-static int
-acpi_pci_irq_add_entry(acpi_handle handle,
- int segment, int bus, struct acpi_pci_routing_table *prt)
-{
- struct acpi_prt_entry *entry = NULL;
+/* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */
+static const 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 const 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 const 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 {
+ const struct dmi_system_id *system;
+ unsigned int segment;
+ unsigned int bus;
+ unsigned int device;
+ unsigned char pin;
+ const char *source; /* according to BIOS */
+ const char *actual_source;
+};
+
+#define PCI_INTX_PIN(c) (c - 'A' + 1)
- ACPI_FUNCTION_TRACE("acpi_pci_irq_add_entry");
+/*
+ * 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 const struct prt_quirk prt_quirks[] = {
+ { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'),
+ "\\_SB_.PCI0.ISA_.LNKA",
+ "\\_SB_.PCI0.ISA_.LNKB"},
+ { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'),
+ "\\_SB_.LNKB",
+ "\\_SB_.LNKA"},
+ { hp_t5710, 0, 0, 1, PCI_INTX_PIN('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;
+ const 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 == quirk->pin &&
+ !strcmp(prt->source, quirk->source) &&
+ strlen(prt->source) >= strlen(quirk->actual_source)) {
+ printk(KERN_WARNING PREFIX "firmware reports "
+ "%04x:%02x:%02x PCI INT %c connected to %s; "
+ "changing to %s\n",
+ entry->id.segment, entry->id.bus,
+ entry->id.device, pin_name(entry->pin),
+ prt->source, quirk->actual_source);
+ strcpy(prt->source, quirk->actual_source);
+ }
+ }
+}
- if (!prt)
- return_VALUE(-EINVAL);
+static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
+ struct acpi_pci_routing_table *prt)
+{
+ struct acpi_prt_entry *entry;
- entry = kmalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
+ entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
if (!entry)
- return_VALUE(-ENOMEM);
- memset(entry, 0, sizeof(struct acpi_prt_entry));
+ return -ENOMEM;
- entry->id.segment = segment;
- entry->id.bus = bus;
+ /*
+ * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses
+ * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert
+ * it here.
+ */
+ entry->id.segment = pci_domain_nr(bus);
+ entry->id.bus = bus->number;
entry->id.device = (prt->address >> 16) & 0xFFFF;
- entry->id.function = prt->address & 0xFFFF;
- entry->pin = prt->pin;
+ entry->pin = prt->pin + 1;
+
+ do_prt_fixups(entry, prt);
+
+ entry->index = prt->source_index;
/*
* Type 1: Dynamic
* (e.g. exists somewhere 'below' this _PRT entry in the ACPI
* namespace).
*/
- if (prt->source[0]) {
- acpi_get_handle(handle, prt->source, &entry->link.handle);
- entry->link.index = prt->source_index;
- }
+ if (prt->source[0])
+ acpi_get_handle(handle, prt->source, &entry->link);
+
/*
* Type 2: Static
* --------------
* the IRQ value, which is hardwired to specific interrupt inputs on
* the interrupt controller.
*/
- else
- entry->link.index = prt->source_index;
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO,
- " %02X:%02X:%02X[%c] -> %s[%d]\n",
+ " %04x:%02x:%02x[%c] -> %s[%d]\n",
entry->id.segment, entry->id.bus,
- entry->id.device, ('A' + entry->pin), prt->source,
- entry->link.index));
+ entry->id.device, pin_name(entry->pin),
+ prt->source, entry->index));
spin_lock(&acpi_prt_lock);
- list_add_tail(&entry->node, &acpi_prt.entries);
- acpi_prt.count++;
+ list_add_tail(&entry->list, &acpi_prt_list);
spin_unlock(&acpi_prt_lock);
- return_VALUE(0);
+ return 0;
}
-static void
-acpi_pci_irq_del_entry(int segment, int bus, struct acpi_prt_entry *entry)
+int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
{
- if (segment == entry->id.segment && bus == entry->id.bus) {
- acpi_prt.count--;
- list_del(&entry->node);
- kfree(entry);
- }
-}
+ acpi_status status;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_pci_routing_table *entry;
-int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
-{
- acpi_status status = AE_OK;
- char *pathname = NULL;
- struct acpi_buffer buffer = { 0, NULL };
- struct acpi_pci_routing_table *prt = NULL;
- struct acpi_pci_routing_table *entry = NULL;
- static int first_time = 1;
-
- ACPI_FUNCTION_TRACE("acpi_pci_irq_add_prt");
-
- pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
- if (!pathname)
- return_VALUE(-ENOMEM);
- memset(pathname, 0, ACPI_PATHNAME_MAX);
-
- if (first_time) {
- acpi_prt.count = 0;
- INIT_LIST_HEAD(&acpi_prt.entries);
- first_time = 0;
- }
-
- /*
- * NOTE: We're given a 'handle' to the _PRT object's parent device
- * (either a PCI root bridge or PCI-PCI bridge).
- */
-
- buffer.length = ACPI_PATHNAME_MAX;
- buffer.pointer = pathname;
- acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */
+ status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n",
- pathname);
+ (char *) buffer.pointer);
- /*
- * Evaluate this _PRT and add its entries to our global list (acpi_prt).
- */
+ kfree(buffer.pointer);
- buffer.length = 0;
+ buffer.length = ACPI_ALLOCATE_BUFFER;
buffer.pointer = NULL;
- kfree(pathname);
- status = acpi_get_irq_routing_table(handle, &buffer);
- if (status != AE_BUFFER_OVERFLOW) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _PRT [%s]\n",
- acpi_format_exception(status)));
- return_VALUE(-ENODEV);
- }
-
- prt = kmalloc(buffer.length, GFP_KERNEL);
- if (!prt) {
- return_VALUE(-ENOMEM);
- }
- memset(prt, 0, buffer.length);
- buffer.pointer = prt;
status = acpi_get_irq_routing_table(handle, &buffer);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _PRT [%s]\n",
- acpi_format_exception(status)));
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]",
+ acpi_format_exception(status)));
kfree(buffer.pointer);
- return_VALUE(-ENODEV);
+ return -ENODEV;
}
- entry = prt;
-
+ entry = buffer.pointer;
while (entry && (entry->length > 0)) {
- acpi_pci_irq_add_entry(handle, segment, bus, entry);
+ acpi_pci_irq_add_entry(handle, bus, entry);
entry = (struct acpi_pci_routing_table *)
((unsigned long)entry + entry->length);
}
- kfree(prt);
-
- return_VALUE(0);
+ kfree(buffer.pointer);
+ return 0;
}
-void acpi_pci_irq_del_prt(int segment, int bus)
+void acpi_pci_irq_del_prt(struct pci_bus *bus)
{
- struct list_head *node = NULL, *n = NULL;
- struct acpi_prt_entry *entry = NULL;
-
- if (!acpi_prt.count) {
- return;
- }
+ struct acpi_prt_entry *entry, *tmp;
printk(KERN_DEBUG
- "ACPI: Delete PCI Interrupt Routing Table for %x:%x\n", segment,
- bus);
+ "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n",
+ pci_domain_nr(bus), bus->number);
spin_lock(&acpi_prt_lock);
- list_for_each_safe(node, n, &acpi_prt.entries) {
- entry = list_entry(node, struct acpi_prt_entry, node);
-
- acpi_pci_irq_del_entry(segment, bus, entry);
+ list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) {
+ if (pci_domain_nr(bus) == entry->id.segment
+ && bus->number == entry->id.bus) {
+ list_del(&entry->list);
+ kfree(entry);
+ }
}
spin_unlock(&acpi_prt_lock);
}
/* --------------------------------------------------------------------------
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 *triggering, int *polarity, char **link)
+static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
{
- 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, triggering,
- polarity, link);
- if (irq < 0) {
- ACPI_DEBUG_PRINT((ACPI_DB_WARN,
- "Invalid IRQ link routing entry\n"));
- return_VALUE(-1);
- }
- } else {
- irq = entry->link.index;
- *triggering = ACPI_LEVEL_SENSITIVE;
- *polarity = ACPI_ACTIVE_LOW;
+ struct acpi_prt_entry *entry;
+ struct pci_dev *bridge;
+ u8 bridge_pin, orig_pin = pin;
+
+ entry = acpi_pci_irq_find_prt_entry(dev, pin);
+ if (entry) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n",
+ pci_name(dev), pin_name(pin)));
+ return entry;
}
- 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 *triggering, int *polarity, 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
- * failure: return -1
- */
-static int
-acpi_pci_irq_lookup(struct pci_bus *bus,
- int device,
- int pin,
- int *triggering,
- int *polarity, char **link, irq_lookup_func func)
-{
- struct acpi_prt_entry *entry = NULL;
- int segment = pci_domain_nr(bus);
- int bus_nr = bus->number;
- int ret;
-
- ACPI_FUNCTION_TRACE("acpi_pci_irq_lookup");
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Searching for PRT entry for %02x:%02x:%02x[%c]\n",
- segment, bus_nr, device, ('A' + pin)));
-
- entry = acpi_pci_irq_find_prt_entry(segment, bus_nr, device, pin);
- if (!entry) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PRT entry not found\n"));
- return_VALUE(-1);
- }
-
- ret = func(entry, triggering, polarity, link);
- return_VALUE(ret);
-}
-
-/*
- * acpi_pci_irq_derive
- * success: return IRQ >= 0
- * failure: return < 0
- */
-static int
-acpi_pci_irq_derive(struct pci_dev *dev,
- int pin,
- int *triggering,
- int *polarity, char **link, irq_lookup_func func)
-{
- struct pci_dev *bridge = dev;
- int irq = -1;
- u8 bridge_pin = 0;
-
- ACPI_FUNCTION_TRACE("acpi_pci_irq_derive");
-
- if (!dev)
- return_VALUE(-EINVAL);
-
/*
* Attempt to derive an IRQ for this device from a parent bridge's
* PCI interrupt routing entry (eg. yenta bridge and add-in card bridge).
*/
- while (irq < 0 && bridge->bus->self) {
- pin = (pin + PCI_SLOT(bridge->devfn)) % 4;
- bridge = bridge->bus->self;
+ bridge = dev->bus->self;
+ while (bridge) {
+ pin = pci_swizzle_interrupt_pin(dev, pin);
if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) {
/* PC card has the same IRQ as its cardbridge */
- pci_read_config_byte(bridge, PCI_INTERRUPT_PIN,
- &bridge_pin);
+ bridge_pin = bridge->pin;
if (!bridge_pin) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"No interrupt pin configured for device %s\n",
pci_name(bridge)));
- return_VALUE(-1);
+ return NULL;
}
- /* Pin is from 0 to 3 */
- bridge_pin--;
pin = bridge_pin;
}
- irq = acpi_pci_irq_lookup(bridge->bus, PCI_SLOT(bridge->devfn),
- pin, triggering, polarity,
- link, func);
- }
+ entry = acpi_pci_irq_find_prt_entry(bridge, pin);
+ if (entry) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Derived GSI for %s INT %c from %s\n",
+ pci_name(dev), pin_name(orig_pin),
+ pci_name(bridge)));
+ return entry;
+ }
- if (irq < 0) {
- ACPI_DEBUG_PRINT((ACPI_DB_WARN,
- "Unable to derive IRQ for device %s\n",
- pci_name(dev)));
- return_VALUE(-1);
+ dev = bridge;
+ bridge = dev->bus->self;
}
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Derive IRQ %d for device %s from %s\n",
- irq, pci_name(dev), pci_name(bridge)));
-
- return_VALUE(irq);
+ dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n",
+ pin_name(orig_pin));
+ return NULL;
}
-/*
- * acpi_pci_irq_enable
- * success: return 0
- * failure: return < 0
- */
-
int acpi_pci_irq_enable(struct pci_dev *dev)
{
- int irq = 0;
- u8 pin = 0;
+ struct acpi_prt_entry *entry;
+ int gsi;
+ u8 pin;
int triggering = ACPI_LEVEL_SENSITIVE;
int polarity = ACPI_ACTIVE_LOW;
char *link = NULL;
+ char link_desc[16];
int rc;
- ACPI_FUNCTION_TRACE("acpi_pci_irq_enable");
-
- if (!dev)
- return_VALUE(-EINVAL);
-
- pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+ pin = dev->pin;
if (!pin) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"No interrupt pin configured for device %s\n",
pci_name(dev)));
- return_VALUE(0);
+ return 0;
}
- pin--;
- if (!dev->bus) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Invalid (NULL) 'bus' field\n"));
- return_VALUE(-ENODEV);
+ entry = acpi_pci_irq_lookup(dev, pin);
+ if (!entry) {
+ /*
+ * IDE legacy mode controller IRQs are magic. Why do compat
+ * extensions always make such a nasty mess.
+ */
+ if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE &&
+ (dev->class & 0x05) == 0)
+ return 0;
}
- /*
- * First we check the PCI IRQ routing table (PRT) for an IRQ. PRT
- * values override any BIOS-assigned IRQs set during boot.
- */
- irq = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin,
- &triggering, &polarity, &link,
- acpi_pci_allocate_irq);
-
- /*
- * If no PRT entry was found, we'll try to derive an IRQ from the
- * device's parent bridge.
- */
- if (irq < 0)
- irq = acpi_pci_irq_derive(dev, pin, &triggering,
- &polarity, &link,
- acpi_pci_allocate_irq);
+ if (entry) {
+ if (entry->link)
+ gsi = acpi_pci_link_allocate_irq(entry->link,
+ entry->index,
+ &triggering, &polarity,
+ &link);
+ else
+ gsi = entry->index;
+ } else
+ gsi = -1;
/*
* No IRQ known to the ACPI subsystem - maybe the BIOS /
* driver reported one, then use it. Exit in any case.
*/
- if (irq < 0) {
- printk(KERN_WARNING PREFIX "PCI Interrupt %s[%c]: no GSI",
- pci_name(dev), ('A' + pin));
+ if (gsi < 0) {
+ dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin));
/* Interrupt Line values above 0xF are forbidden */
if (dev->irq > 0 && (dev->irq <= 0xF)) {
printk(" - using IRQ %d\n", dev->irq);
- acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE,
+ acpi_register_gsi(&dev->dev, dev->irq,
+ ACPI_LEVEL_SENSITIVE,
ACPI_ACTIVE_LOW);
- return_VALUE(0);
+ return 0;
} else {
printk("\n");
- return_VALUE(0);
+ return 0;
}
}
- rc = acpi_register_gsi(irq, triggering, polarity);
+ rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);
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_warn(&dev->dev, "PCI INT %c: failed to register GSI\n",
+ pin_name(pin));
+ return rc;
}
dev->irq = rc;
- printk(KERN_INFO PREFIX "PCI Interrupt %s[%c] -> ",
- pci_name(dev), 'A' + pin);
-
if (link)
- printk("Link [%s] -> ", link);
+ snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link);
+ else
+ link_desc[0] = '\0';
- printk("GSI %u (%s, %s) -> IRQ %d\n", irq,
- (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge",
- (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq);
+ dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n",
+ pin_name(pin), link_desc, gsi,
+ (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge",
+ (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq);
- return_VALUE(0);
+ return 0;
}
-EXPORT_SYMBOL(acpi_pci_irq_enable);
-
/* FIXME: implement x86/x86_64 version */
void __attribute__ ((weak)) acpi_unregister_gsi(u32 i)
{
void acpi_pci_irq_disable(struct pci_dev *dev)
{
- int gsi = 0;
- u8 pin = 0;
- int triggering = ACPI_LEVEL_SENSITIVE;
- int polarity = ACPI_ACTIVE_LOW;
+ struct acpi_prt_entry *entry;
+ int gsi;
+ u8 pin;
- ACPI_FUNCTION_TRACE("acpi_pci_irq_disable");
-
- if (!dev || !dev->bus)
- return_VOID;
-
- pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
+ pin = dev->pin;
if (!pin)
- return_VOID;
- pin--;
+ return;
- /*
- * First we check the PCI IRQ routing table (PRT) for an IRQ.
- */
- gsi = acpi_pci_irq_lookup(dev->bus, PCI_SLOT(dev->devfn), pin,
- &triggering, &polarity, 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,
- &triggering, &polarity, NULL,
- acpi_pci_free_irq);
- if (gsi < 0)
- return_VOID;
+ entry = acpi_pci_irq_lookup(dev, pin);
+ if (!entry)
+ return;
+
+ if (entry->link)
+ gsi = acpi_pci_link_free_irq(entry->link);
+ else
+ gsi = entry->index;
/*
* TBD: It might be worth clearing dev->irq by magic constant
* (e.g. PCI_UNDEFINED_IRQ).
*/
- printk(KERN_INFO PREFIX "PCI interrupt for device %s disabled\n",
- pci_name(dev));
-
+ dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin));
acpi_unregister_gsi(gsi);
-
- return_VOID;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff