PCI/ACPI: move _OSC code to pci_root.c
[linux-2.6.git] / drivers / pci / pci-acpi.c
index deea8a1..fac5edd 100644 (file)
 #include <linux/pci-acpi.h>
 #include "pci.h"
 
-struct acpi_osc_data {
-       acpi_handle handle;
-       u32 support_set;
-       u32 control_set;
-       u32 control_query;
-       int is_queried;
-       struct list_head sibiling;
-};
-static LIST_HEAD(acpi_osc_data_list);
-
-struct acpi_osc_args {
-       u32 capbuf[3];
-};
-
-static DEFINE_MUTEX(pci_acpi_lock);
-
-static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
-{
-       struct acpi_osc_data *data;
-
-       list_for_each_entry(data, &acpi_osc_data_list, sibiling) {
-               if (data->handle == handle)
-                       return data;
-       }
-       data = kzalloc(sizeof(*data), GFP_KERNEL);
-       if (!data)
-               return NULL;
-       INIT_LIST_HEAD(&data->sibiling);
-       data->handle = handle;
-       list_add_tail(&data->sibiling, &acpi_osc_data_list);
-       return data;
-}
-
-static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40,
-                         0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
-
-static acpi_status acpi_run_osc(acpi_handle handle,
-                               struct acpi_osc_args *osc_args, u32 *retval)
-{
-       acpi_status status;
-       struct acpi_object_list input;
-       union acpi_object in_params[4];
-       struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
-       union acpi_object *out_obj;
-       u32 errors, flags = osc_args->capbuf[OSC_QUERY_TYPE];
-
-       /* Setting up input parameters */
-       input.count = 4;
-       input.pointer = in_params;
-       in_params[0].type               = ACPI_TYPE_BUFFER;
-       in_params[0].buffer.length      = 16;
-       in_params[0].buffer.pointer     = OSC_UUID;
-       in_params[1].type               = ACPI_TYPE_INTEGER;
-       in_params[1].integer.value      = 1;
-       in_params[2].type               = ACPI_TYPE_INTEGER;
-       in_params[2].integer.value      = 3;
-       in_params[3].type               = ACPI_TYPE_BUFFER;
-       in_params[3].buffer.length      = 12;
-       in_params[3].buffer.pointer     = (u8 *)osc_args->capbuf;
-
-       status = acpi_evaluate_object(handle, "_OSC", &input, &output);
-       if (ACPI_FAILURE(status))
-               return status;
-
-       if (!output.length)
-               return AE_NULL_OBJECT;
-
-       out_obj = output.pointer;
-       if (out_obj->type != ACPI_TYPE_BUFFER) {
-               printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n");
-               status = AE_TYPE;
-               goto out_kfree;
-       }
-       /* Need to ignore the bit0 in result code */
-       errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
-       if (errors) {
-               if (errors & OSC_REQUEST_ERROR)
-                       printk(KERN_DEBUG "_OSC request fails\n"); 
-               if (errors & OSC_INVALID_UUID_ERROR)
-                       printk(KERN_DEBUG "_OSC invalid UUID\n"); 
-               if (errors & OSC_INVALID_REVISION_ERROR)
-                       printk(KERN_DEBUG "_OSC invalid revision\n"); 
-               if (errors & OSC_CAPABILITIES_MASK_ERROR) {
-                       if (flags & OSC_QUERY_ENABLE)
-                               goto out_success;
-                       printk(KERN_DEBUG "_OSC FW not grant req. control\n");
-                       status = AE_SUPPORT;
-                       goto out_kfree;
-               }
-               status = AE_ERROR;
-               goto out_kfree;
-       }
-out_success:
-       *retval = *((u32 *)(out_obj->buffer.pointer + 8));
-       status = AE_OK;
-
-out_kfree:
-       kfree(output.pointer);
-       return status;
-}
-
-static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data)
-{
-       acpi_status status;
-       u32 support_set, result;
-       struct acpi_osc_args osc_args;
-
-       /* do _OSC query for all possible controls */
-       support_set = osc_data->support_set | (flags & OSC_SUPPORT_MASKS);
-       osc_args.capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
-       osc_args.capbuf[OSC_SUPPORT_TYPE] = support_set;
-       osc_args.capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
-
-       status = acpi_run_osc(osc_data->handle, &osc_args, &result);
-       if (ACPI_SUCCESS(status)) {
-               osc_data->support_set = support_set;
-               osc_data->control_query = result;
-               osc_data->is_queried = 1;
-       }
-
-       return status;
-}
-
-/*
- * pci_acpi_osc_support: Invoke _OSC indicating support for the given feature
- * @flags: Bitmask of flags to support
- *
- * See the ACPI spec for the definition of the flags
- */
-int pci_acpi_osc_support(acpi_handle handle, u32 flags)
-{
-       acpi_status status;
-       acpi_handle tmp;
-       struct acpi_osc_data *osc_data;
-       int rc = 0;
-
-       status = acpi_get_handle(handle, "_OSC", &tmp);
-       if (ACPI_FAILURE(status))
-               return -ENOTTY;
-
-       mutex_lock(&pci_acpi_lock);
-       osc_data = acpi_get_osc_data(handle);
-       if (!osc_data) {
-               printk(KERN_ERR "acpi osc data array is full\n");
-               rc = -ENOMEM;
-               goto out;
-       }
-
-       __acpi_query_osc(flags, osc_data);
-out:
-       mutex_unlock(&pci_acpi_lock);
-       return rc;
-}
-
-/**
- * pci_osc_control_set - commit requested control to Firmware
- * @handle: acpi_handle for the target ACPI object
- * @flags: driver's requested control bits
- *
- * Attempt to take control from Firmware on requested control bits.
- **/
-acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
-{
-       acpi_status status;
-       u32 control_req, control_set, result;
-       acpi_handle tmp;
-       struct acpi_osc_data *osc_data;
-       struct acpi_osc_args osc_args;
-
-       status = acpi_get_handle(handle, "_OSC", &tmp);
-       if (ACPI_FAILURE(status))
-               return status;
-
-       mutex_lock(&pci_acpi_lock);
-       osc_data = acpi_get_osc_data(handle);
-       if (!osc_data) {
-               printk(KERN_ERR "acpi osc data array is full\n");
-               status = AE_ERROR;
-               goto out;
-       }
-
-       control_req = (flags & OSC_CONTROL_MASKS);
-       if (!control_req) {
-               status = AE_TYPE;
-               goto out;
-       }
-
-       /* No need to evaluate _OSC if the control was already granted. */
-       if ((osc_data->control_set & control_req) == control_req)
-               goto out;
-
-       if (!osc_data->is_queried) {
-               status = __acpi_query_osc(osc_data->support_set, osc_data);
-               if (ACPI_FAILURE(status))
-                       goto out;
-       }
-
-       if ((osc_data->control_query & control_req) != control_req) {
-               status = AE_SUPPORT;
-               goto out;
-       }
-
-       control_set = osc_data->control_set | control_req;
-       osc_args.capbuf[OSC_QUERY_TYPE] = 0;
-       osc_args.capbuf[OSC_SUPPORT_TYPE] = osc_data->support_set;
-       osc_args.capbuf[OSC_CONTROL_TYPE] = control_set;
-       status = acpi_run_osc(handle, &osc_args, &result);
-       if (ACPI_SUCCESS(status))
-               osc_data->control_set = result;
-out:
-       mutex_unlock(&pci_acpi_lock);
-       return status;
-}
-EXPORT_SYMBOL(pci_osc_control_set);
-
 /*
  * _SxD returns the D-state with the highest power
  * (lowest D-state number) supported in the S-state "x".