* 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>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
ACPI_MODULE_NAME("pci_irq");
struct acpi_prt_entry {
- struct list_head node;
+ struct list_head list;
struct acpi_pci_id id;
u8 pin;
- struct {
- acpi_handle handle;
- u32 index;
- } link;
- u32 irq;
+ acpi_handle link;
+ u32 index; /* GSI, or link _CRS index */
};
-struct acpi_prt_list {
- int count;
- struct list_head entries;
-};
-
-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)
static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev,
int pin)
{
- struct acpi_prt_entry *entry = NULL;
+ struct acpi_prt_entry *entry;
int segment = pci_domain_nr(dev->bus);
int bus = dev->bus->number;
int device = PCI_SLOT(dev->devfn);
- if (!acpi_prt.count)
- return NULL;
-
- /*
- * 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_entry(entry, &acpi_prt.entries, node) {
+ list_for_each_entry(entry, &acpi_prt_list, list) {
if ((segment == entry->id.segment)
&& (bus == entry->id.bus)
&& (device == entry->id.device)
return entry;
}
}
-
spin_unlock(&acpi_prt_lock);
return NULL;
}
"\\_SB_.PCI0.LNK3"},
};
-static void
-do_prt_fixups(struct acpi_prt_entry *entry, struct acpi_pci_routing_table *prt)
+static void do_prt_fixups(struct acpi_prt_entry *entry,
+ struct acpi_pci_routing_table *prt)
{
int i;
struct prt_quirk *quirk;
}
}
-static int
-acpi_pci_irq_add_entry(acpi_handle handle,
- int segment, int bus, struct acpi_pci_routing_table *prt)
+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;
+ struct acpi_prt_entry *entry;
entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
if (!entry)
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,
" %04x:%02x:%02x[%c] -> %s[%d]\n",
entry->id.segment, entry->id.bus,
entry->id.device, pin_name(entry->pin),
- prt->source, entry->link.index));
+ 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 0;
}
-static void
-acpi_pci_irq_del_entry(int segment, int bus, struct acpi_prt_entry *entry)
-{
- if (segment == entry->id.segment && bus == entry->id.bus) {
- acpi_prt.count--;
- list_del(&entry->node);
- kfree(entry);
- }
-}
-
int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
{
acpi_status status;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_pci_routing_table *entry;
- static int first_time = 1;
-
- if (first_time) {
- acpi_prt.count = 0;
- INIT_LIST_HEAD(&acpi_prt.entries);
- first_time = 0;
- }
/* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */
status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
void acpi_pci_irq_del_prt(int segment, int 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 %04x:%02x\n",
segment, bus);
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 (segment == entry->id.segment && bus == entry->id.bus) {
+ list_del(&entry->list);
+ kfree(entry);
+ }
}
spin_unlock(&acpi_prt_lock);
}
/* --------------------------------------------------------------------------
PCI Interrupt Routing Support
-------------------------------------------------------------------------- */
-static int
-acpi_pci_allocate_irq(struct acpi_prt_entry *entry,
- int *triggering, int *polarity, char **link)
-{
- int irq;
-
-
- if (entry->link.handle) {
- irq = acpi_pci_link_allocate_irq(entry->link.handle,
- entry->link.index, triggering,
- polarity, link);
- if (irq < 0) {
- printk(KERN_WARNING PREFIX
- "Invalid IRQ link routing entry\n");
- return -1;
- }
- } else {
- irq = entry->link.index;
- *triggering = ACPI_LEVEL_SENSITIVE;
- *polarity = ACPI_ACTIVE_LOW;
- }
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found GSI %d\n", irq));
- return irq;
-}
-
-static int
-acpi_pci_free_irq(struct acpi_prt_entry *entry)
-{
- int irq;
-
- if (entry->link.handle) {
- irq = acpi_pci_link_free_irq(entry->link.handle);
- } else {
- irq = entry->link.index;
- }
- return irq;
-}
-
-static struct acpi_prt_entry *
-acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
+static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
{
struct acpi_prt_entry *entry;
struct pci_dev *bridge;
return NULL;
}
-/*
- * acpi_pci_irq_enable
- * success: return 0
- * failure: return < 0
- */
-
int acpi_pci_irq_enable(struct pci_dev *dev)
{
struct acpi_prt_entry *entry;
- int gsi = 0;
- u8 pin = 0;
+ int gsi;
+ u8 pin;
int triggering = ACPI_LEVEL_SENSITIVE;
int polarity = ACPI_ACTIVE_LOW;
char *link = NULL;
char link_desc[16];
int rc;
-
pin = dev->pin;
if (!pin) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
return 0;
}
- if (entry)
- gsi = acpi_pci_allocate_irq(entry, &triggering, &polarity,
- &link);
- else
+ 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;
/*
void acpi_pci_irq_disable(struct pci_dev *dev)
{
struct acpi_prt_entry *entry;
- int gsi = 0;
- u8 pin = 0;
-
+ int gsi;
+ u8 pin;
pin = dev->pin;
if (!pin)
if (!entry)
return;
- gsi = acpi_pci_free_irq(entry);
+ 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
projects / linux-2.6-block.git / blobdiff