summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/pci_bind.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/pci_bind.c')
-rw-r--r--drivers/acpi/pci_bind.c323
1 files changed, 36 insertions, 287 deletions
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c
index 95650f83ce2..a5a77b78a72 100644
--- a/drivers/acpi/pci_bind.c
+++ b/drivers/acpi/pci_bind.c
@@ -24,12 +24,7 @@
*/
#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
#include <linux/types.h>
-#include <linux/proc_fs.h>
-#include <linux/spinlock.h>
-#include <linux/pm.h>
#include <linux/pci.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
@@ -38,322 +33,76 @@
#define _COMPONENT ACPI_PCI_COMPONENT
ACPI_MODULE_NAME("pci_bind");
-struct acpi_pci_data {
- struct acpi_pci_id id;
- struct pci_bus *bus;
+static int acpi_pci_unbind(struct acpi_device *device)
+{
struct pci_dev *dev;
-};
-static int acpi_pci_unbind(struct acpi_device *device);
+ dev = acpi_get_pci_dev(device->handle);
+ if (!dev || !dev->subordinate)
+ goto out;
-static void acpi_pci_data_handler(acpi_handle handle, u32 function,
- void *context)
-{
+ acpi_pci_irq_del_prt(dev->subordinate);
- /* TBD: Anything we need to do here? */
+ device->ops.bind = NULL;
+ device->ops.unbind = NULL;
- return;
+out:
+ pci_dev_put(dev);
+ return 0;
}
-/**
- * acpi_get_pci_id
- * ------------------
- * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
- * to resolve PCI information for ACPI-PCI devices defined in the namespace.
- * This typically occurs when resolving PCI operation region information.
- */
-acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id)
+static int acpi_pci_bind(struct acpi_device *device)
{
- int result = 0;
- acpi_status status = AE_OK;
- struct acpi_device *device = NULL;
- struct acpi_pci_data *data = NULL;
-
-
- if (!id)
- return AE_BAD_PARAMETER;
-
- result = acpi_bus_get_device(handle, &device);
- if (result) {
- printk(KERN_ERR PREFIX
- "Invalid ACPI Bus context for device %s\n",
- acpi_device_bid(device));
- return AE_NOT_EXIST;
- }
-
- status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
- if (ACPI_FAILURE(status) || !data) {
- ACPI_EXCEPTION((AE_INFO, status,
- "Invalid ACPI-PCI context for device %s",
- acpi_device_bid(device)));
- return status;
- }
-
- *id = data->id;
-
- /*
- id->segment = data->id.segment;
- id->bus = data->id.bus;
- id->device = data->id.device;
- id->function = data->id.function;
- */
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Device %s has PCI address %04x:%02x:%02x.%d\n",
- acpi_device_bid(device), id->segment, id->bus,
- id->device, id->function));
-
- return AE_OK;
-}
-
-EXPORT_SYMBOL(acpi_get_pci_id);
-
-int acpi_pci_bind(struct acpi_device *device)
-{
- int result = 0;
acpi_status status;
- struct acpi_pci_data *data;
- struct acpi_pci_data *pdata;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_handle handle;
- struct pci_dev *dev;
struct pci_bus *bus;
+ struct pci_dev *dev;
-
- if (!device || !device->parent)
- return -EINVAL;
-
- data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
- if (ACPI_FAILURE(status)) {
- kfree(data);
- return -ENODEV;
- }
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
- (char *)buffer.pointer));
-
- /*
- * Segment & Bus
- * -------------
- * These are obtained via the parent device's ACPI-PCI context.
- */
- status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
- (void **)&pdata);
- if (ACPI_FAILURE(status) || !pdata || !pdata->bus) {
- ACPI_EXCEPTION((AE_INFO, status,
- "Invalid ACPI-PCI context for parent device %s",
- acpi_device_bid(device->parent)));
- result = -ENODEV;
- goto end;
- }
- data->id.segment = pdata->id.segment;
- data->id.bus = pdata->bus->number;
-
- /*
- * Device & Function
- * -----------------
- * These are simply obtained from the device's _ADR method. Note
- * that a value of zero is valid.
- */
- data->id.device = device->pnp.bus_address >> 16;
- data->id.function = device->pnp.bus_address & 0xFFFF;
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %04x:%02x:%02x.%d\n",
- data->id.segment, data->id.bus, data->id.device,
- data->id.function));
-
- /*
- * TBD: Support slot devices (e.g. function=0xFFFF).
- */
-
- /*
- * Locate PCI Device
- * -----------------
- * Locate matching device in PCI namespace. If it doesn't exist
- * this typically means that the device isn't currently inserted
- * (e.g. docking station, port replicator, etc.).
- * We cannot simply search the global pci device list, since
- * PCI devices are added to the global pci list when the root
- * bridge start ops are run, which may not have happened yet.
- */
- bus = pci_find_bus(data->id.segment, data->id.bus);
- if (bus) {
- list_for_each_entry(dev, &bus->devices, bus_list) {
- if (dev->devfn == PCI_DEVFN(data->id.device,
- data->id.function)) {
- data->dev = dev;
- break;
- }
- }
- }
- if (!data->dev) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Device %04x:%02x:%02x.%d not present in PCI namespace\n",
- data->id.segment, data->id.bus,
- data->id.device, data->id.function));
- result = -ENODEV;
- goto end;
- }
- if (!data->dev->bus) {
- printk(KERN_ERR PREFIX
- "Device %04x:%02x:%02x.%d has invalid 'bus' field\n",
- data->id.segment, data->id.bus,
- data->id.device, data->id.function);
- result = -ENODEV;
- goto end;
- }
+ dev = acpi_get_pci_dev(device->handle);
+ if (!dev)
+ return 0;
/*
- * PCI Bridge?
- * -----------
- * If so, set the 'bus' field and install the 'bind' function to
- * facilitate callbacks for all of its children.
+ * Install the 'bind' function to facilitate callbacks for
+ * children of the P2P bridge.
*/
- if (data->dev->subordinate) {
+ if (dev->subordinate) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Device %04x:%02x:%02x.%d is a PCI bridge\n",
- data->id.segment, data->id.bus,
- data->id.device, data->id.function));
- data->bus = data->dev->subordinate;
+ pci_domain_nr(dev->bus), dev->bus->number,
+ PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)));
device->ops.bind = acpi_pci_bind;
device->ops.unbind = acpi_pci_unbind;
}
/*
- * Attach ACPI-PCI Context
- * -----------------------
- * Thus binding the ACPI and PCI devices.
- */
- status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
- if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status,
- "Unable to attach ACPI-PCI context to device %s",
- acpi_device_bid(device)));
- result = -ENODEV;
- goto end;
- }
-
- /*
- * PCI Routing Table
- * -----------------
- * Evaluate and parse _PRT, if exists. This code is independent of
- * PCI bridges (above) to allow parsing of _PRT objects within the
- * scope of non-bridge devices. Note that _PRTs within the scope of
- * a PCI bridge assume the bridge's subordinate bus number.
+ * Evaluate and parse _PRT, if exists. This code allows parsing of
+ * _PRT objects within the scope of non-bridge devices. Note that
+ * _PRTs within the scope of a PCI bridge assume the bridge's
+ * subordinate bus number.
*
* TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
*/
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
- if (ACPI_SUCCESS(status)) {
- if (data->bus) /* PCI-PCI bridge */
- acpi_pci_irq_add_prt(device->handle, data->id.segment,
- data->bus->number);
- else /* non-bridge PCI device */
- acpi_pci_irq_add_prt(device->handle, data->id.segment,
- data->id.bus);
- }
-
- end:
- kfree(buffer.pointer);
- if (result)
- kfree(data);
-
- return result;
-}
-
-static int acpi_pci_unbind(struct acpi_device *device)
-{
- int result = 0;
- acpi_status status;
- struct acpi_pci_data *data;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-
-
- if (!device || !device->parent)
- return -EINVAL;
-
- status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
if (ACPI_FAILURE(status))
- return -ENODEV;
+ goto out;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
- (char *) buffer.pointer));
- kfree(buffer.pointer);
+ if (dev->subordinate)
+ bus = dev->subordinate;
+ else
+ bus = dev->bus;
- status =
- acpi_get_data(device->handle, acpi_pci_data_handler,
- (void **)&data);
- if (ACPI_FAILURE(status)) {
- result = -ENODEV;
- goto end;
- }
+ acpi_pci_irq_add_prt(device->handle, bus);
- status = acpi_detach_data(device->handle, acpi_pci_data_handler);
- if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status,
- "Unable to detach data from device %s",
- acpi_device_bid(device)));
- result = -ENODEV;
- goto end;
- }
- if (data->dev->subordinate) {
- acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
- }
- kfree(data);
-
- end:
- return result;
+out:
+ pci_dev_put(dev);
+ return 0;
}
-int
-acpi_pci_bind_root(struct acpi_device *device,
- struct acpi_pci_id *id, struct pci_bus *bus)
+int acpi_pci_bind_root(struct acpi_device *device)
{
- int result = 0;
- acpi_status status;
- struct acpi_pci_data *data = NULL;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-
- if (!device || !id || !bus) {
- return -EINVAL;
- }
-
- data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- data->id = *id;
- data->bus = bus;
device->ops.bind = acpi_pci_bind;
device->ops.unbind = acpi_pci_unbind;
- status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
- if (ACPI_FAILURE(status)) {
- kfree (data);
- return -ENODEV;
- }
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
- "%04x:%02x\n", (char *)buffer.pointer,
- id->segment, id->bus));
-
- status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
- if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status,
- "Unable to attach ACPI-PCI context to device %s",
- (char *)buffer.pointer));
- result = -ENODEV;
- goto end;
- }
-
- end:
- kfree(buffer.pointer);
- if (result != 0)
- kfree(data);
-
- return result;
+ return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-20 18:45:23 +0000