#include <linux/pm.h>
#include <linux/pci.h>
#include <linux/mutex.h>
+#include <linux/slab.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
-#define _COMPONENT ACPI_PCI_COMPONENT
+#define PREFIX "ACPI: "
+
+#define _COMPONENT ACPI_PCI_COMPONENT
ACPI_MODULE_NAME("pci_link");
#define ACPI_PCI_LINK_CLASS "pci_irq_routing"
#define ACPI_PCI_LINK_DEVICE_NAME "PCI Interrupt Link"
#define ACPI_PCI_LINK_FILE_INFO "info"
#define ACPI_PCI_LINK_FILE_STATUS "state"
-#define ACPI_PCI_LINK_MAX_POSSIBLE 16
+#define ACPI_PCI_LINK_MAX_POSSIBLE 16
+
static int acpi_pci_link_add(struct acpi_device *device);
static int acpi_pci_link_remove(struct acpi_device *device, int type);
-static struct acpi_device_id link_device_ids[] = {
+static const struct acpi_device_id link_device_ids[] = {
{"PNP0C0F", 0},
{"", 0},
};
.ops = {
.add = acpi_pci_link_add,
.remove = acpi_pci_link_remove,
- },
+ },
};
/*
struct acpi_pci_link_irq {
u8 active; /* Current IRQ */
u8 triggering; /* All IRQs */
- u8 polarity; /* All IRQs */
+ u8 polarity; /* All IRQs */
u8 resource_type;
u8 possible_count;
u8 possible[ACPI_PCI_LINK_MAX_POSSIBLE];
};
struct acpi_pci_link {
- struct list_head node;
- struct acpi_device *device;
- struct acpi_pci_link_irq irq;
- int refcnt;
+ struct list_head list;
+ struct acpi_device *device;
+ struct acpi_pci_link_irq irq;
+ int refcnt;
};
-static struct {
- int count;
- struct list_head entries;
-} acpi_link;
+static LIST_HEAD(acpi_link_list);
static DEFINE_MUTEX(acpi_link_lock);
/* --------------------------------------------------------------------------
/*
* set context (link) possible list from resource list
*/
-static acpi_status
-acpi_pci_link_check_possible(struct acpi_resource *resource, void *context)
+static acpi_status acpi_pci_link_check_possible(struct acpi_resource *resource,
+ void *context)
{
struct acpi_pci_link *link = context;
- u32 i = 0;
-
+ u32 i;
switch (resource->type) {
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
{
acpi_status status;
-
- if (!link)
- return -EINVAL;
-
status = acpi_walk_resources(link->device->handle, METHOD_NAME__PRS,
acpi_pci_link_check_possible, link);
if (ACPI_FAILURE(status)) {
return 0;
}
-static acpi_status
-acpi_pci_link_check_current(struct acpi_resource *resource, void *context)
+static acpi_status acpi_pci_link_check_current(struct acpi_resource *resource,
+ void *context)
{
- int *irq = (int *)context;
-
+ int *irq = context;
switch (resource->type) {
case ACPI_RESOURCE_TYPE_START_DEPENDENT:
static int acpi_pci_link_get_current(struct acpi_pci_link *link)
{
int result = 0;
- acpi_status status = AE_OK;
+ acpi_status status;
int irq = 0;
- if (!link)
- return -EINVAL;
-
link->irq.active = 0;
/* in practice, status disabled is meaningless, ignore it */
static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
{
- int result = 0;
- acpi_status status = AE_OK;
+ int result;
+ acpi_status status;
struct {
struct acpi_resource res;
struct acpi_resource end;
} *resource;
struct acpi_buffer buffer = { 0, NULL };
-
- if (!link || !irq)
+ if (!irq)
return -EINVAL;
resource = kzalloc(sizeof(*resource) + 1, irqs_disabled() ? GFP_ATOMIC: GFP_KERNEL);
PIRQ_PENALTY_PCI_AVAILABLE, /* IRQ9 PCI, often acpi */
PIRQ_PENALTY_PCI_AVAILABLE, /* IRQ10 PCI */
PIRQ_PENALTY_PCI_AVAILABLE, /* IRQ11 PCI */
- PIRQ_PENALTY_ISA_USED, /* IRQ12 mouse */
- PIRQ_PENALTY_ISA_USED, /* IRQ13 fpe, sometimes */
- PIRQ_PENALTY_ISA_USED, /* IRQ14 ide0 */
- PIRQ_PENALTY_ISA_USED, /* IRQ15 ide1 */
+ PIRQ_PENALTY_ISA_USED, /* IRQ12 mouse */
+ PIRQ_PENALTY_ISA_USED, /* IRQ13 fpe, sometimes */
+ PIRQ_PENALTY_ISA_USED, /* IRQ14 ide0 */
+ PIRQ_PENALTY_ISA_USED, /* IRQ15 ide1 */
/* >IRQ15 */
};
int __init acpi_irq_penalty_init(void)
{
- struct list_head *node = NULL;
- struct acpi_pci_link *link = NULL;
- int i = 0;
-
+ struct acpi_pci_link *link;
+ int i;
/*
* Update penalties to facilitate IRQ balancing.
*/
- list_for_each(node, &acpi_link.entries) {
-
- link = list_entry(node, struct acpi_pci_link, node);
- if (!link) {
- printk(KERN_ERR PREFIX "Invalid link context\n");
- continue;
- }
+ list_for_each_entry(link, &acpi_link_list, list) {
/*
* reflect the possible and active irqs in the penalty table --
}
/* Add a penalty for the SCI */
acpi_irq_penalty[acpi_gbl_FADT.sci_interrupt] += PIRQ_PENALTY_PCI_USING;
-
return 0;
}
int irq;
int i;
-
if (link->irq.initialized) {
if (link->refcnt == 0)
/* This means the link is disabled but initialized */
/*
* if active found, use it; else pick entry from end of possible list.
*/
- if (link->irq.active) {
+ if (link->irq.active)
irq = link->irq.active;
- } else {
+ else
irq = link->irq.possible[link->irq.possible_count - 1];
- }
if (acpi_irq_balance || !link->irq.active) {
/*
return -ENODEV;
} else {
acpi_irq_penalty[link->irq.active] += PIRQ_PENALTY_PCI_USING;
- printk(PREFIX "%s [%s] enabled at IRQ %d\n",
+ printk(KERN_WARNING PREFIX "%s [%s] enabled at IRQ %d\n",
acpi_device_name(link->device),
acpi_device_bid(link->device), link->irq.active);
}
link->irq.initialized = 1;
-
return 0;
}
* success: return IRQ >= 0
* failure: return -1
*/
-
-int
-acpi_pci_link_allocate_irq(acpi_handle handle,
- int index,
- int *triggering, int *polarity, char **name)
+int acpi_pci_link_allocate_irq(acpi_handle handle, int index, int *triggering,
+ int *polarity, char **name)
{
- int result = 0;
- struct acpi_device *device = NULL;
- struct acpi_pci_link *link = NULL;
-
+ int result;
+ struct acpi_device *device;
+ struct acpi_pci_link *link;
result = acpi_bus_get_device(handle, &device);
if (result) {
*/
int acpi_pci_link_free_irq(acpi_handle handle)
{
- struct acpi_device *device = NULL;
- struct acpi_pci_link *link = NULL;
+ struct acpi_device *device;
+ struct acpi_pci_link *link;
acpi_status result;
-
result = acpi_bus_get_device(handle, &device);
if (result) {
printk(KERN_ERR PREFIX "Invalid link device\n");
"Link %s is dereferenced\n",
acpi_device_bid(link->device)));
- if (link->refcnt == 0) {
+ if (link->refcnt == 0)
acpi_evaluate_object(link->device->handle, "_DIS", NULL, NULL);
- }
+
mutex_unlock(&acpi_link_lock);
return (link->irq.active);
}
static int acpi_pci_link_add(struct acpi_device *device)
{
- int result = 0;
- struct acpi_pci_link *link = NULL;
- int i = 0;
+ int result;
+ struct acpi_pci_link *link;
+ int i;
int found = 0;
-
- if (!device)
- return -EINVAL;
-
link = kzalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
if (!link)
return -ENOMEM;
printk("\n");
- /* TBD: Acquire/release lock */
- list_add_tail(&link->node, &acpi_link.entries);
- acpi_link.count++;
+ list_add_tail(&link->list, &acpi_link_list);
end:
/* disable all links -- to be activated on use */
static int acpi_pci_link_resume(struct acpi_pci_link *link)
{
-
if (link->refcnt && link->irq.active && link->irq.initialized)
return (acpi_pci_link_set(link, link->irq.active));
- else
- return 0;
+
+ return 0;
}
static int irqrouter_resume(struct sys_device *dev)
{
- struct list_head *node = NULL;
- struct acpi_pci_link *link = NULL;
-
+ struct acpi_pci_link *link;
- /* Make sure SCI is enabled again (Apple firmware bug?) */
- acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1);
-
- list_for_each(node, &acpi_link.entries) {
- link = list_entry(node, struct acpi_pci_link, node);
- if (!link) {
- printk(KERN_ERR PREFIX "Invalid link context\n");
- continue;
- }
+ list_for_each_entry(link, &acpi_link_list, list) {
acpi_pci_link_resume(link);
}
return 0;
static int acpi_pci_link_remove(struct acpi_device *device, int type)
{
- struct acpi_pci_link *link = NULL;
-
-
- if (!device || !acpi_driver_data(device))
- return -EINVAL;
+ struct acpi_pci_link *link;
link = acpi_driver_data(device);
mutex_lock(&acpi_link_lock);
- list_del(&link->node);
+ list_del(&link->list);
mutex_unlock(&acpi_link_lock);
kfree(link);
-
return 0;
}
{
int error;
-
if (acpi_disabled || acpi_noirq)
return 0;
acpi_irq_balance = 0;
}
- acpi_link.count = 0;
- INIT_LIST_HEAD(&acpi_link.entries);
-
if (acpi_bus_register_driver(&acpi_pci_link_driver) < 0)
return -ENODEV;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff