* for IRQ management (e.g. start()->_SRS).
*/
+#include <linux/sysdev.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/pm.h>
#include <linux/pci.h>
+#include <linux/mutex.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
-
#define _COMPONENT ACPI_PCI_COMPONENT
-ACPI_MODULE_NAME ("pci_link")
-
+ACPI_MODULE_NAME("pci_link")
#define ACPI_PCI_LINK_CLASS "pci_irq_routing"
#define ACPI_PCI_LINK_HID "PNP0C0F"
#define ACPI_PCI_LINK_DRIVER_NAME "ACPI PCI Interrupt Link Driver"
#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
-
-static int acpi_pci_link_add (struct acpi_device *device);
-static int acpi_pci_link_remove (struct acpi_device *device, int type);
+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_driver acpi_pci_link_driver = {
- .name = ACPI_PCI_LINK_DRIVER_NAME,
- .class = ACPI_PCI_LINK_CLASS,
- .ids = ACPI_PCI_LINK_HID,
- .ops = {
- .add = acpi_pci_link_add,
- .remove = acpi_pci_link_remove,
- },
+ .name = ACPI_PCI_LINK_DRIVER_NAME,
+ .class = ACPI_PCI_LINK_CLASS,
+ .ids = ACPI_PCI_LINK_HID,
+ .ops = {
+ .add = acpi_pci_link_add,
+ .remove = acpi_pci_link_remove,
+ },
};
+/*
+ * If a link is initialized, we never change its active and initialized
+ * later even the link is disable. Instead, we just repick the active irq
+ */
struct acpi_pci_link_irq {
- u8 active; /* Current IRQ */
- u8 edge_level; /* All IRQs */
- u8 active_high_low; /* All IRQs */
- u8 setonboot;
- u8 resource_type;
- u8 possible_count;
- u8 possible[ACPI_PCI_LINK_MAX_POSSIBLE];
+ u8 active; /* Current IRQ */
+ u8 triggering; /* All IRQs */
+ u8 polarity; /* All IRQs */
+ u8 resource_type;
+ u8 possible_count;
+ u8 possible[ACPI_PCI_LINK_MAX_POSSIBLE];
+ u8 initialized:1;
+ u8 reserved:7;
};
struct acpi_pci_link {
- struct list_head node;
- struct acpi_device *device;
- acpi_handle handle;
+ struct list_head node;
+ struct acpi_device *device;
struct acpi_pci_link_irq irq;
+ int refcnt;
};
static struct {
- int count;
- struct list_head entries;
-} acpi_link;
-
+ int count;
+ struct list_head entries;
+} acpi_link;
+DEFINE_MUTEX(acpi_link_lock);
/* --------------------------------------------------------------------------
PCI Link Device Management
* set context (link) possible list from resource list
*/
static acpi_status
-acpi_pci_link_check_possible (
- struct acpi_resource *resource,
- void *context)
+acpi_pci_link_check_possible(struct acpi_resource *resource, void *context)
{
- struct acpi_pci_link *link = (struct acpi_pci_link *) context;
- u32 i = 0;
+ struct acpi_pci_link *link = context;
+ u32 i = 0;
- ACPI_FUNCTION_TRACE("acpi_pci_link_check_possible");
- switch (resource->id) {
- case ACPI_RSTYPE_START_DPF:
+ switch (resource->type) {
+ case ACPI_RESOURCE_TYPE_START_DEPENDENT:
return AE_OK;
- case ACPI_RSTYPE_IRQ:
- {
- struct acpi_resource_irq *p = &resource->data.irq;
- if (!p || !p->number_of_interrupts) {
- ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Blank IRQ resource\n"));
- return AE_OK;
- }
- for (i = 0; (i<p->number_of_interrupts && i<ACPI_PCI_LINK_MAX_POSSIBLE); i++) {
- if (!p->interrupts[i]) {
- ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid IRQ %d\n", p->interrupts[i]));
- continue;
+ case ACPI_RESOURCE_TYPE_IRQ:
+ {
+ struct acpi_resource_irq *p = &resource->data.irq;
+ if (!p || !p->interrupt_count) {
+ printk(KERN_WARNING PREFIX "Blank IRQ resource\n");
+ return AE_OK;
}
- link->irq.possible[i] = p->interrupts[i];
- link->irq.possible_count++;
- }
- link->irq.edge_level = p->edge_level;
- link->irq.active_high_low = p->active_high_low;
- link->irq.resource_type = ACPI_RSTYPE_IRQ;
- break;
- }
- case ACPI_RSTYPE_EXT_IRQ:
- {
- struct acpi_resource_ext_irq *p = &resource->data.extended_irq;
- if (!p || !p->number_of_interrupts) {
- ACPI_DEBUG_PRINT((ACPI_DB_WARN,
- "Blank EXT IRQ resource\n"));
- return AE_OK;
+ for (i = 0;
+ (i < p->interrupt_count
+ && i < ACPI_PCI_LINK_MAX_POSSIBLE); i++) {
+ if (!p->interrupts[i]) {
+ printk(KERN_WARNING PREFIX "Invalid IRQ %d\n",
+ p->interrupts[i]);
+ continue;
+ }
+ link->irq.possible[i] = p->interrupts[i];
+ link->irq.possible_count++;
+ }
+ link->irq.triggering = p->triggering;
+ link->irq.polarity = p->polarity;
+ link->irq.resource_type = ACPI_RESOURCE_TYPE_IRQ;
+ break;
}
- for (i = 0; (i<p->number_of_interrupts && i<ACPI_PCI_LINK_MAX_POSSIBLE); i++) {
- if (!p->interrupts[i]) {
- ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid IRQ %d\n", p->interrupts[i]));
- continue;
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ {
+ struct acpi_resource_extended_irq *p =
+ &resource->data.extended_irq;
+ if (!p || !p->interrupt_count) {
+ printk(KERN_WARNING PREFIX
+ "Blank EXT IRQ resource\n");
+ return AE_OK;
+ }
+ for (i = 0;
+ (i < p->interrupt_count
+ && i < ACPI_PCI_LINK_MAX_POSSIBLE); i++) {
+ if (!p->interrupts[i]) {
+ printk(KERN_WARNING PREFIX "Invalid IRQ %d\n",
+ p->interrupts[i]);
+ continue;
+ }
+ link->irq.possible[i] = p->interrupts[i];
+ link->irq.possible_count++;
}
- link->irq.possible[i] = p->interrupts[i];
- link->irq.possible_count++;
+ link->irq.triggering = p->triggering;
+ link->irq.polarity = p->polarity;
+ link->irq.resource_type = ACPI_RESOURCE_TYPE_EXTENDED_IRQ;
+ break;
}
- link->irq.edge_level = p->edge_level;
- link->irq.active_high_low = p->active_high_low;
- link->irq.resource_type = ACPI_RSTYPE_EXT_IRQ;
- break;
- }
default:
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Resource is not an IRQ entry\n"));
+ printk(KERN_ERR PREFIX "Resource is not an IRQ entry\n");
return AE_OK;
}
return AE_CTRL_TERMINATE;
}
-
-static int
-acpi_pci_link_get_possible (
- struct acpi_pci_link *link)
+static int acpi_pci_link_get_possible(struct acpi_pci_link *link)
{
- acpi_status status;
+ acpi_status status;
- ACPI_FUNCTION_TRACE("acpi_pci_link_get_possible");
if (!link)
- return_VALUE(-EINVAL);
+ return -EINVAL;
- status = acpi_walk_resources(link->handle, METHOD_NAME__PRS,
- acpi_pci_link_check_possible, link);
+ status = acpi_walk_resources(link->device->handle, METHOD_NAME__PRS,
+ acpi_pci_link_check_possible, link);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _PRS\n"));
- return_VALUE(-ENODEV);
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRS"));
+ return -ENODEV;
}
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Found %d possible IRQs\n", link->irq.possible_count));
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Found %d possible IRQs\n",
+ link->irq.possible_count));
- return_VALUE(0);
+ return 0;
}
-
static acpi_status
-acpi_pci_link_check_current (
- struct acpi_resource *resource,
- void *context)
+acpi_pci_link_check_current(struct acpi_resource *resource, void *context)
{
- int *irq = (int *) context;
-
- ACPI_FUNCTION_TRACE("acpi_pci_link_check_current");
-
- switch (resource->id) {
- case ACPI_RSTYPE_IRQ:
- {
- struct acpi_resource_irq *p = &resource->data.irq;
- if (!p || !p->number_of_interrupts) {
- /*
- * IRQ descriptors may have no IRQ# bits set,
- * particularly those those w/ _STA disabled
- */
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Blank IRQ resource\n"));
- return AE_OK;
+ int *irq = (int *)context;
+
+
+ switch (resource->type) {
+ case ACPI_RESOURCE_TYPE_IRQ:
+ {
+ struct acpi_resource_irq *p = &resource->data.irq;
+ if (!p || !p->interrupt_count) {
+ /*
+ * IRQ descriptors may have no IRQ# bits set,
+ * particularly those those w/ _STA disabled
+ */
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Blank IRQ resource\n"));
+ return AE_OK;
+ }
+ *irq = p->interrupts[0];
+ break;
}
- *irq = p->interrupts[0];
- break;
- }
- case ACPI_RSTYPE_EXT_IRQ:
- {
- struct acpi_resource_ext_irq *p = &resource->data.extended_irq;
- if (!p || !p->number_of_interrupts) {
- /*
- * extended IRQ descriptors must
- * return at least 1 IRQ
- */
- ACPI_DEBUG_PRINT((ACPI_DB_WARN,
- "Blank EXT IRQ resource\n"));
- return AE_OK;
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ {
+ struct acpi_resource_extended_irq *p =
+ &resource->data.extended_irq;
+ if (!p || !p->interrupt_count) {
+ /*
+ * extended IRQ descriptors must
+ * return at least 1 IRQ
+ */
+ printk(KERN_WARNING PREFIX
+ "Blank EXT IRQ resource\n");
+ return AE_OK;
+ }
+ *irq = p->interrupts[0];
+ break;
}
- *irq = p->interrupts[0];
break;
- }
default:
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Resource isn't an IRQ\n"));
+ printk(KERN_ERR PREFIX "Resource %d isn't an IRQ\n", resource->type);
+ case ACPI_RESOURCE_TYPE_END_TAG:
return AE_OK;
}
return AE_CTRL_TERMINATE;
* 0 - success
* !0 - failure
*/
-static int
-acpi_pci_link_get_current (
- struct acpi_pci_link *link)
+static int acpi_pci_link_get_current(struct acpi_pci_link *link)
{
- int result = 0;
- acpi_status status = AE_OK;
- int irq = 0;
-
- ACPI_FUNCTION_TRACE("acpi_pci_link_get_current");
+ int result = 0;
+ acpi_status status = AE_OK;
+ int irq = 0;
- if (!link || !link->handle)
- return_VALUE(-EINVAL);
+ if (!link)
+ return -EINVAL;
link->irq.active = 0;
/* Query _STA, set link->device->status */
result = acpi_bus_get_status(link->device);
if (result) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to read status\n"));
+ printk(KERN_ERR PREFIX "Unable to read status\n");
goto end;
}
if (!link->device->status.enabled) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Link disabled\n"));
- return_VALUE(0);
+ return 0;
}
}
* Query and parse _CRS to get the current IRQ assignment.
*/
- status = acpi_walk_resources(link->handle, METHOD_NAME__CRS,
- acpi_pci_link_check_current, &irq);
+ status = acpi_walk_resources(link->device->handle, METHOD_NAME__CRS,
+ acpi_pci_link_check_current, &irq);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _CRS\n"));
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _CRS"));
result = -ENODEV;
goto end;
}
if (acpi_strict && !irq) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "_CRS returned 0\n"));
+ printk(KERN_ERR PREFIX "_CRS returned 0\n");
result = -ENODEV;
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Link at IRQ %d \n", link->irq.active));
-end:
- return_VALUE(result);
+ end:
+ return result;
}
-static int
-acpi_pci_link_set (
- struct acpi_pci_link *link,
- int irq)
+static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
{
- int result = 0;
- acpi_status status = AE_OK;
+ int result = 0;
+ acpi_status status = AE_OK;
struct {
- struct acpi_resource res;
- struct acpi_resource end;
- } resource;
- struct acpi_buffer buffer = {sizeof(resource)+1, &resource};
+ struct acpi_resource res;
+ struct acpi_resource end;
+ } *resource;
+ struct acpi_buffer buffer = { 0, NULL };
- ACPI_FUNCTION_TRACE("acpi_pci_link_set");
if (!link || !irq)
- return_VALUE(-EINVAL);
-
- memset(&resource, 0, sizeof(resource));
-
- switch(link->irq.resource_type) {
- case ACPI_RSTYPE_IRQ:
- resource.res.id = ACPI_RSTYPE_IRQ;
- resource.res.length = sizeof(struct acpi_resource);
- resource.res.data.irq.edge_level = link->irq.edge_level;
- resource.res.data.irq.active_high_low = link->irq.active_high_low;
- if (link->irq.edge_level == ACPI_EDGE_SENSITIVE)
- resource.res.data.irq.shared_exclusive = ACPI_EXCLUSIVE;
+ return -EINVAL;
+
+ resource = kzalloc(sizeof(*resource) + 1, irqs_disabled() ? GFP_ATOMIC: GFP_KERNEL);
+ if (!resource)
+ return -ENOMEM;
+
+ buffer.length = sizeof(*resource) + 1;
+ buffer.pointer = resource;
+
+ switch (link->irq.resource_type) {
+ case ACPI_RESOURCE_TYPE_IRQ:
+ resource->res.type = ACPI_RESOURCE_TYPE_IRQ;
+ resource->res.length = sizeof(struct acpi_resource);
+ resource->res.data.irq.triggering = link->irq.triggering;
+ resource->res.data.irq.polarity =
+ link->irq.polarity;
+ if (link->irq.triggering == ACPI_EDGE_SENSITIVE)
+ resource->res.data.irq.sharable =
+ ACPI_EXCLUSIVE;
else
- resource.res.data.irq.shared_exclusive = ACPI_SHARED;
- resource.res.data.irq.number_of_interrupts = 1;
- resource.res.data.irq.interrupts[0] = irq;
+ resource->res.data.irq.sharable = ACPI_SHARED;
+ resource->res.data.irq.interrupt_count = 1;
+ resource->res.data.irq.interrupts[0] = irq;
break;
-
- case ACPI_RSTYPE_EXT_IRQ:
- resource.res.id = ACPI_RSTYPE_EXT_IRQ;
- resource.res.length = sizeof(struct acpi_resource);
- resource.res.data.extended_irq.producer_consumer = ACPI_CONSUMER;
- resource.res.data.extended_irq.edge_level = link->irq.edge_level;
- resource.res.data.extended_irq.active_high_low = link->irq.active_high_low;
- if (link->irq.edge_level == ACPI_EDGE_SENSITIVE)
- resource.res.data.irq.shared_exclusive = ACPI_EXCLUSIVE;
+
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ resource->res.type = ACPI_RESOURCE_TYPE_EXTENDED_IRQ;
+ resource->res.length = sizeof(struct acpi_resource);
+ resource->res.data.extended_irq.producer_consumer =
+ ACPI_CONSUMER;
+ resource->res.data.extended_irq.triggering =
+ link->irq.triggering;
+ resource->res.data.extended_irq.polarity =
+ link->irq.polarity;
+ if (link->irq.triggering == ACPI_EDGE_SENSITIVE)
+ resource->res.data.irq.sharable =
+ ACPI_EXCLUSIVE;
else
- resource.res.data.irq.shared_exclusive = ACPI_SHARED;
- resource.res.data.extended_irq.number_of_interrupts = 1;
- resource.res.data.extended_irq.interrupts[0] = irq;
+ resource->res.data.irq.sharable = ACPI_SHARED;
+ resource->res.data.extended_irq.interrupt_count = 1;
+ resource->res.data.extended_irq.interrupts[0] = irq;
/* ignore resource_source, it's optional */
break;
default:
- printk("ACPI BUG: resource_type %d\n", link->irq.resource_type);
- return_VALUE(-EINVAL);
+ printk(KERN_ERR PREFIX "Invalid Resource_type %d\n", link->irq.resource_type);
+ result = -EINVAL;
+ goto end;
}
- resource.end.id = ACPI_RSTYPE_END_TAG;
+ resource->end.type = ACPI_RESOURCE_TYPE_END_TAG;
/* Attempt to set the resource */
- status = acpi_set_current_resources(link->handle, &buffer);
+ status = acpi_set_current_resources(link->device->handle, &buffer);
/* check for total failure */
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _SRS\n"));
- return_VALUE(-ENODEV);
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SRS"));
+ result = -ENODEV;
+ goto end;
}
/* Query _STA, set device->status */
result = acpi_bus_get_status(link->device);
if (result) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to read status\n"));
- return_VALUE(result);
+ printk(KERN_ERR PREFIX "Unable to read status\n");
+ goto end;
}
if (!link->device->status.enabled) {
printk(KERN_WARNING PREFIX
- "%s [%s] disabled and referenced, BIOS bug.\n",
- acpi_device_name(link->device),
- acpi_device_bid(link->device));
+ "%s [%s] disabled and referenced, BIOS bug\n",
+ acpi_device_name(link->device),
+ acpi_device_bid(link->device));
}
/* Query _CRS, set link->irq.active */
result = acpi_pci_link_get_current(link);
if (result) {
- return_VALUE(result);
+ goto end;
}
/*
* policy: when _CRS doesn't return what we just _SRS
* assume _SRS worked and override _CRS value.
*/
- printk(KERN_WARNING PREFIX
- "%s [%s] BIOS reported IRQ %d, using IRQ %d\n",
- acpi_device_name(link->device),
- acpi_device_bid(link->device),
- link->irq.active, irq);
+ printk(KERN_WARNING PREFIX
+ "%s [%s] BIOS reported IRQ %d, using IRQ %d\n",
+ acpi_device_name(link->device),
+ acpi_device_bid(link->device), link->irq.active, irq);
link->irq.active = irq;
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Set IRQ %d\n", link->irq.active));
-
- return_VALUE(0);
-}
+ end:
+ kfree(resource);
+ return result;
+}
/* --------------------------------------------------------------------------
PCI Link IRQ Management
#define PIRQ_PENALTY_ISA_USED (16*16*16*16*16)
#define PIRQ_PENALTY_ISA_ALWAYS (16*16*16*16*16*16)
-static int __initdata acpi_irq_penalty[ACPI_MAX_IRQS] = {
+static int acpi_irq_penalty[ACPI_MAX_IRQS] = {
PIRQ_PENALTY_ISA_ALWAYS, /* IRQ0 timer */
PIRQ_PENALTY_ISA_ALWAYS, /* IRQ1 keyboard */
PIRQ_PENALTY_ISA_ALWAYS, /* IRQ2 cascade */
- PIRQ_PENALTY_ISA_TYPICAL, /* IRQ3 serial */
- PIRQ_PENALTY_ISA_TYPICAL, /* IRQ4 serial */
+ PIRQ_PENALTY_ISA_TYPICAL, /* IRQ3 serial */
+ PIRQ_PENALTY_ISA_TYPICAL, /* IRQ4 serial */
PIRQ_PENALTY_ISA_TYPICAL, /* IRQ5 sometimes SoundBlaster */
PIRQ_PENALTY_ISA_TYPICAL, /* IRQ6 */
PIRQ_PENALTY_ISA_TYPICAL, /* IRQ7 parallel, spurious */
PIRQ_PENALTY_ISA_USED, /* IRQ13 fpe, sometimes */
PIRQ_PENALTY_ISA_USED, /* IRQ14 ide0 */
PIRQ_PENALTY_ISA_USED, /* IRQ15 ide1 */
- /* >IRQ15 */
+ /* >IRQ15 */
};
-int
-acpi_irq_penalty_init(void)
+int __init acpi_irq_penalty_init(void)
{
- struct list_head *node = NULL;
- struct acpi_pci_link *link = NULL;
- int i = 0;
+ struct list_head *node = NULL;
+ struct acpi_pci_link *link = NULL;
+ int i = 0;
- ACPI_FUNCTION_TRACE("acpi_irq_penalty_init");
/*
* Update penalties to facilitate IRQ balancing.
link = list_entry(node, struct acpi_pci_link, node);
if (!link) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid link context\n"));
+ printk(KERN_ERR PREFIX "Invalid link context\n");
continue;
}
* useful for breaking ties.
*/
if (link->irq.possible_count) {
- int penalty = PIRQ_PENALTY_PCI_POSSIBLE / link->irq.possible_count;
+ int penalty =
+ PIRQ_PENALTY_PCI_POSSIBLE /
+ link->irq.possible_count;
for (i = 0; i < link->irq.possible_count; i++) {
if (link->irq.possible[i] < ACPI_MAX_ISA_IRQ)
- acpi_irq_penalty[link->irq.possible[i]] += penalty;
+ acpi_irq_penalty[link->irq.
+ possible[i]] +=
+ penalty;
}
} else if (link->irq.active) {
- acpi_irq_penalty[link->irq.active] += PIRQ_PENALTY_PCI_POSSIBLE;
+ acpi_irq_penalty[link->irq.active] +=
+ PIRQ_PENALTY_PCI_POSSIBLE;
}
}
/* Add a penalty for the SCI */
acpi_irq_penalty[acpi_fadt.sci_int] += PIRQ_PENALTY_PCI_USING;
- return_VALUE(0);
+ return 0;
}
static int acpi_irq_balance; /* 0: static, 1: balance */
-static int acpi_pci_link_allocate(struct acpi_pci_link* link) {
+static int acpi_pci_link_allocate(struct acpi_pci_link *link)
+{
int irq;
int i;
- ACPI_FUNCTION_TRACE("acpi_pci_link_allocate");
- if (link->irq.setonboot)
- return_VALUE(0);
+ if (link->irq.initialized) {
+ if (link->refcnt == 0)
+ /* This means the link is disabled but initialized */
+ acpi_pci_link_set(link, link->irq.active);
+ return 0;
+ }
/*
* search for active IRQ in list of possible IRQs.
if (i == link->irq.possible_count) {
if (acpi_strict)
printk(KERN_WARNING PREFIX "_CRS %d not found"
- " in _PRS\n", link->irq.active);
+ " in _PRS\n", link->irq.active);
link->irq.active = 0;
}
* the use of IRQs 9, 10, 11, and >15.
*/
for (i = (link->irq.possible_count - 1); i >= 0; i--) {
- if (acpi_irq_penalty[irq] > acpi_irq_penalty[link->irq.possible[i]])
+ if (acpi_irq_penalty[irq] >
+ acpi_irq_penalty[link->irq.possible[i]])
irq = link->irq.possible[i];
}
}
/* Attempt to enable the link device at this IRQ. */
if (acpi_pci_link_set(link, irq)) {
- printk(PREFIX "Unable to set IRQ for %s [%s] (likely buggy ACPI BIOS).\n"
- "Try pci=noacpi or acpi=off\n",
- acpi_device_name(link->device),
- acpi_device_bid(link->device));
- return_VALUE(-ENODEV);
+ printk(KERN_ERR PREFIX "Unable to set IRQ for %s [%s]. "
+ "Try pci=noacpi or acpi=off\n",
+ acpi_device_name(link->device),
+ acpi_device_bid(link->device));
+ return -ENODEV;
} else {
acpi_irq_penalty[link->irq.active] += PIRQ_PENALTY_PCI_USING;
- printk(PREFIX "%s [%s] enabled at IRQ %d\n",
- acpi_device_name(link->device),
- acpi_device_bid(link->device), link->irq.active);
+ printk(PREFIX "%s [%s] enabled at IRQ %d\n",
+ acpi_device_name(link->device),
+ acpi_device_bid(link->device), link->irq.active);
}
- link->irq.setonboot = 1;
+ link->irq.initialized = 1;
- return_VALUE(0);
+ return 0;
}
+/*
+ * acpi_pci_link_allocate_irq
+ * success: return IRQ >= 0
+ * failure: return -1
+ */
int
-acpi_pci_link_get_irq (
- acpi_handle handle,
- int index,
- int* edge_level,
- int* active_high_low)
+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 = 0;
+ struct acpi_device *device = NULL;
+ struct acpi_pci_link *link = NULL;
- ACPI_FUNCTION_TRACE("acpi_pci_link_get_irq");
result = acpi_bus_get_device(handle, &device);
if (result) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid link device\n"));
- return_VALUE(0);
+ printk(KERN_ERR PREFIX "Invalid link device\n");
+ return -1;
}
- link = (struct acpi_pci_link *) acpi_driver_data(device);
+ link = acpi_driver_data(device);
if (!link) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid link context\n"));
- return_VALUE(0);
+ printk(KERN_ERR PREFIX "Invalid link context\n");
+ return -1;
}
/* TBD: Support multiple index (IRQ) entries per Link Device */
if (index) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid index %d\n", index));
- return_VALUE(0);
+ printk(KERN_ERR PREFIX "Invalid index %d\n", index);
+ return -1;
}
- if (acpi_pci_link_allocate(link))
- return_VALUE(0);
-
- if (!link->irq.active) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Link active IRQ is 0!\n"));
- return_VALUE(0);
+ mutex_lock(&acpi_link_lock);
+ if (acpi_pci_link_allocate(link)) {
+ mutex_unlock(&acpi_link_lock);
+ return -1;
}
- if (edge_level) *edge_level = link->irq.edge_level;
- if (active_high_low) *active_high_low = link->irq.active_high_low;
- return_VALUE(link->irq.active);
+ if (!link->irq.active) {
+ mutex_unlock(&acpi_link_lock);
+ printk(KERN_ERR PREFIX "Link active IRQ is 0!\n");
+ return -1;
+ }
+ link->refcnt++;
+ mutex_unlock(&acpi_link_lock);
+
+ if (triggering)
+ *triggering = link->irq.triggering;
+ if (polarity)
+ *polarity = link->irq.polarity;
+ if (name)
+ *name = acpi_device_bid(link->device);
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Link %s is referenced\n",
+ acpi_device_bid(link->device)));
+ return (link->irq.active);
}
+/*
+ * We don't change link's irq information here. After it is reenabled, we
+ * continue use the info
+ */
+int acpi_pci_link_free_irq(acpi_handle handle)
+{
+ struct acpi_device *device = NULL;
+ struct acpi_pci_link *link = NULL;
+ acpi_status result;
+
+
+ result = acpi_bus_get_device(handle, &device);
+ if (result) {
+ printk(KERN_ERR PREFIX "Invalid link device\n");
+ return -1;
+ }
+
+ link = acpi_driver_data(device);
+ if (!link) {
+ printk(KERN_ERR PREFIX "Invalid link context\n");
+ return -1;
+ }
+
+ mutex_lock(&acpi_link_lock);
+ if (!link->irq.initialized) {
+ mutex_unlock(&acpi_link_lock);
+ printk(KERN_ERR PREFIX "Link isn't initialized\n");
+ return -1;
+ }
+#ifdef FUTURE_USE
+ /*
+ * The Link reference count allows us to _DISable an unused link
+ * and suspend time, and set it again on resume.
+ * However, 2.6.12 still has irq_router.resume
+ * which blindly restores the link state.
+ * So we disable the reference count method
+ * to prevent duplicate acpi_pci_link_set()
+ * which would harm some systems
+ */
+ link->refcnt--;
+#endif
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Link %s is dereferenced\n",
+ acpi_device_bid(link->device)));
+
+ if (link->refcnt == 0) {
+ acpi_ut_evaluate_object(link->device->handle, "_DIS", 0, NULL);
+ }
+ mutex_unlock(&acpi_link_lock);
+ return (link->irq.active);
+}
/* --------------------------------------------------------------------------
Driver Interface
-------------------------------------------------------------------------- */
-static int
-acpi_pci_link_add (
- struct acpi_device *device)
+static int acpi_pci_link_add(struct acpi_device *device)
{
- int result = 0;
- struct acpi_pci_link *link = NULL;
- int i = 0;
- int found = 0;
+ int result = 0;
+ struct acpi_pci_link *link = NULL;
+ int i = 0;
+ int found = 0;
- ACPI_FUNCTION_TRACE("acpi_pci_link_add");
if (!device)
- return_VALUE(-EINVAL);
+ return -EINVAL;
- link = kmalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
+ link = kzalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
if (!link)
- return_VALUE(-ENOMEM);
- memset(link, 0, sizeof(struct acpi_pci_link));
+ return -ENOMEM;
link->device = device;
- link->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_PCI_LINK_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PCI_LINK_CLASS);
acpi_driver_data(device) = link;
+ mutex_lock(&acpi_link_lock);
result = acpi_pci_link_get_possible(link);
if (result)
goto end;
acpi_pci_link_get_current(link);
printk(PREFIX "%s [%s] (IRQs", acpi_device_name(device),
- acpi_device_bid(device));
+ acpi_device_bid(device));
for (i = 0; i < link->irq.possible_count; i++) {
if (link->irq.active == link->irq.possible[i]) {
printk(" *%d", link->irq.possible[i]);
found = 1;
- }
- else
+ } else
printk(" %d", link->irq.possible[i]);
}
if (!found)
printk(" *%d", link->irq.active);
- if(!link->device->status.enabled)
+ if (!link->device->status.enabled)
printk(", disabled.");
printk("\n");
list_add_tail(&link->node, &acpi_link.entries);
acpi_link.count++;
-end:
+ end:
/* disable all links -- to be activated on use */
- acpi_ut_evaluate_object(link->handle, "_DIS", 0, NULL);
+ acpi_ut_evaluate_object(device->handle, "_DIS", 0, NULL);
+ mutex_unlock(&acpi_link_lock);
if (result)
kfree(link);
- return_VALUE(result);
+ return result;
}
+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;
+}
+
+static int irqrouter_resume(struct sys_device *dev)
+{
+ struct list_head *node = NULL;
+ struct acpi_pci_link *link = NULL;
+
+
+ /* Make sure SCI is enabled again (Apple firmware bug?) */
+ acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1, ACPI_MTX_DO_NOT_LOCK);
+
+ 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;
+ }
+ acpi_pci_link_resume(link);
+ }
+ return 0;
+}
-static int
-acpi_pci_link_remove (
- struct acpi_device *device,
- int type)
+static int acpi_pci_link_remove(struct acpi_device *device, int type)
{
struct acpi_pci_link *link = NULL;
- ACPI_FUNCTION_TRACE("acpi_pci_link_remove");
if (!device || !acpi_driver_data(device))
- return_VALUE(-EINVAL);
+ return -EINVAL;
- link = (struct acpi_pci_link *) acpi_driver_data(device);
+ link = acpi_driver_data(device);
- /* TBD: Acquire/release lock */
+ mutex_lock(&acpi_link_lock);
list_del(&link->node);
+ mutex_unlock(&acpi_link_lock);
kfree(link);
- return_VALUE(0);
+ return 0;
}
/*
int retval;
int irq;
- retval = get_option(&str,&irq);
+ retval = get_option(&str, &irq);
if (!retval)
break; /* no number found */
if (irq < 0)
continue;
-
+
if (irq >= ACPI_MAX_IRQS)
continue;
return 1;
}
+/*
+ * We'd like PNP to call this routine for the
+ * single ISA_USED value for each legacy device.
+ * But instead it calls us with each POSSIBLE setting.
+ * There is no ISA_POSSIBLE weight, so we simply use
+ * the (small) PCI_USING penalty.
+ */
+void acpi_penalize_isa_irq(int irq, int active)
+{
+ if (active)
+ acpi_irq_penalty[irq] += PIRQ_PENALTY_ISA_USED;
+ else
+ acpi_irq_penalty[irq] += PIRQ_PENALTY_PCI_USING;
+}
+
/*
* Over-ride default table to reserve additional IRQs for use by ISA
* e.g. acpi_irq_isa=5
*/
static int __init acpi_irq_isa(char *str)
{
- return(acpi_irq_penalty_update(str, 1));
+ return acpi_irq_penalty_update(str, 1);
}
+
__setup("acpi_irq_isa=", acpi_irq_isa);
/*
*/
static int __init acpi_irq_pci(char *str)
{
- return(acpi_irq_penalty_update(str, 0));
+ return acpi_irq_penalty_update(str, 0);
}
+
__setup("acpi_irq_pci=", acpi_irq_pci);
static int __init acpi_irq_nobalance_set(char *str)
{
acpi_irq_balance = 0;
- return(1);
+ return 1;
}
+
__setup("acpi_irq_nobalance", acpi_irq_nobalance_set);
int __init acpi_irq_balance_set(char *str)
{
acpi_irq_balance = 1;
- return(1);
+ return 1;
}
+
__setup("acpi_irq_balance", acpi_irq_balance_set);
+/* FIXME: we will remove this interface after all drivers call pci_disable_device */
+static struct sysdev_class irqrouter_sysdev_class = {
+ set_kset_name("irqrouter"),
+ .resume = irqrouter_resume,
+};
+
+static struct sys_device device_irqrouter = {
+ .id = 0,
+ .cls = &irqrouter_sysdev_class,
+};
+
+static int __init irqrouter_init_sysfs(void)
+{
+ int error;
+
+
+ if (acpi_disabled || acpi_noirq)
+ return 0;
+
+ error = sysdev_class_register(&irqrouter_sysdev_class);
+ if (!error)
+ error = sysdev_register(&device_irqrouter);
+
+ return error;
+}
+
+device_initcall(irqrouter_init_sysfs);
-static int __init acpi_pci_link_init (void)
+static int __init acpi_pci_link_init(void)
{
- ACPI_FUNCTION_TRACE("acpi_pci_link_init");
- if (acpi_pci_disabled)
- return_VALUE(0);
+ if (acpi_noirq)
+ return 0;
acpi_link.count = 0;
INIT_LIST_HEAD(&acpi_link.entries);
if (acpi_bus_register_driver(&acpi_pci_link_driver) < 0)
- return_VALUE(-ENODEV);
+ return -ENODEV;
- return_VALUE(0);
+ return 0;
}
subsys_initcall(acpi_pci_link_init);
git://git.onelab.eu / linux-2.6.git / blobdiff