/*******************************************************************************
*
* FUNCTION: acpi_walk_resources
*
* PARAMETERS: device_handle - Handle to the device object for the
* device we are querying
* name - Method name of the resources we want.
* (METHOD_NAME__CRS, METHOD_NAME__PRS, or
* METHOD_NAME__AEI)
* user_function - Called for each resource
* context - Passed to user_function
*
* RETURN: Status
*
* DESCRIPTION: Retrieves the current or possible resource list for the
* specified device. The user_function is called once for
* each resource in the list.
*
******************************************************************************/
acpi_status
acpi_walk_resources(acpi_handle device_handle,
char *name,
acpi_walk_resource_callback user_function, void *context)
{
acpi_status status;
struct acpi_buffer buffer;
ACPI_FUNCTION_TRACE(acpi_walk_resources);
/* Parameter validation */
if (!device_handle || !user_function || !name ||
(!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) &&
!ACPI_COMPARE_NAME(name, METHOD_NAME__PRS) &&
!ACPI_COMPARE_NAME(name, METHOD_NAME__AEI))) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Get the _CRS/_PRS/_AEI resource list */
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
status = acpi_rs_get_method_data(device_handle, name, &buffer);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Walk the resource list and cleanup */
status = acpi_walk_resource_buffer(&buffer, user_function, context);
ACPI_FREE(buffer.pointer);
return_ACPI_STATUS(status);
}
acpi_status
acpi_walk_resources (
acpi_handle device_handle,
char *path,
ACPI_WALK_RESOURCE_CALLBACK user_function,
void *context)
{
acpi_status status;
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
struct acpi_resource *resource;
struct acpi_resource *buffer_end;
ACPI_FUNCTION_TRACE ("acpi_walk_resources");
if (!device_handle ||
(ACPI_STRNCMP (path, METHOD_NAME__CRS, sizeof (METHOD_NAME__CRS)) &&
ACPI_STRNCMP (path, METHOD_NAME__PRS, sizeof (METHOD_NAME__PRS)))) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_rs_get_method_data (device_handle, path, &buffer);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Setup pointers */
resource = (struct acpi_resource *) buffer.pointer;
buffer_end = ACPI_CAST_PTR (struct acpi_resource,
((u8 *) buffer.pointer + buffer.length));
/* Walk the resource list */
for (;;) {
if (!resource || resource->id == ACPI_RSTYPE_END_TAG) {
break;
}
status = user_function (resource, context);
switch (status) {
case AE_OK:
case AE_CTRL_DEPTH:
/* Just keep going */
status = AE_OK;
break;
case AE_CTRL_TERMINATE:
/* Exit now, with OK stats */
status = AE_OK;
goto cleanup;
default:
/* All others are valid exceptions */
goto cleanup;
}
/* Get the next resource descriptor */
resource = ACPI_NEXT_RESOURCE (resource);
/* Check for end-of-buffer */
if (resource >= buffer_end) {
goto cleanup;
}
}
cleanup:
acpi_os_free (buffer.pointer);
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_walk_resources
*
* PARAMETERS: device_handle - Handle to the device object for the
* device we are querying
* Name - Method name of the resources we want
* (METHOD_NAME__CRS or METHOD_NAME__PRS)
* user_function - Called for each resource
* Context - Passed to user_function
*
* RETURN: Status
*
* DESCRIPTION: Retrieves the current or possible resource list for the
* specified device. The user_function is called once for
* each resource in the list.
*
******************************************************************************/
acpi_status
acpi_walk_resources(acpi_handle device_handle,
char *name,
acpi_walk_resource_callback user_function, void *context)
{
acpi_status status;
struct acpi_buffer buffer;
struct acpi_resource *resource;
struct acpi_resource *resource_end;
ACPI_FUNCTION_TRACE(acpi_walk_resources);
/* Parameter validation */
if (!device_handle || !user_function || !name ||
(!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) &&
!ACPI_COMPARE_NAME(name, METHOD_NAME__PRS))) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Get the _CRS or _PRS resource list */
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
status = acpi_rs_get_method_data(device_handle, name, &buffer);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Buffer now contains the resource list */
resource = ACPI_CAST_PTR(struct acpi_resource, buffer.pointer);
resource_end =
ACPI_ADD_PTR(struct acpi_resource, buffer.pointer, buffer.length);
/* Walk the resource list until the end_tag is found (or buffer end) */
while (resource < resource_end) {
/* Sanity check the resource */
if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
status = AE_AML_INVALID_RESOURCE_TYPE;
break;
}
/* Invoke the user function, abort on any error returned */
status = user_function(resource, context);
if (ACPI_FAILURE(status)) {
if (status == AE_CTRL_TERMINATE) {
/* This is an OK termination by the user function */
status = AE_OK;
}
break;
}
/* end_tag indicates end-of-list */
if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
break;
}
/* Get the next resource descriptor */
resource =
ACPI_ADD_PTR(struct acpi_resource, resource,
resource->length);
}
ACPI_FREE(buffer.pointer);
return_ACPI_STATUS(status);
}
acpi_status
acpi_walk_resources(acpi_handle device_handle,
char *name,
acpi_walk_resource_callback user_function, void *context)
{
acpi_status status;
struct acpi_buffer buffer;
struct acpi_resource *resource;
struct acpi_resource *resource_end;
ACPI_FUNCTION_TRACE(acpi_walk_resources);
if (!device_handle || !user_function || !name ||
(!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) &&
!ACPI_COMPARE_NAME(name, METHOD_NAME__PRS) &&
!ACPI_COMPARE_NAME(name, METHOD_NAME__AEI))) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
status = acpi_rs_get_method_data(device_handle, name, &buffer);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
resource = ACPI_CAST_PTR(struct acpi_resource, buffer.pointer);
resource_end =
ACPI_ADD_PTR(struct acpi_resource, buffer.pointer, buffer.length);
while (resource < resource_end) {
if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
status = AE_AML_INVALID_RESOURCE_TYPE;
break;
}
status = user_function(resource, context);
if (ACPI_FAILURE(status)) {
if (status == AE_CTRL_TERMINATE) {
status = AE_OK;
}
break;
}
if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
break;
}
resource =
ACPI_ADD_PTR(struct acpi_resource, resource,
resource->length);
}
ACPI_FREE(buffer.pointer);
return_ACPI_STATUS(status);
}
