// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /******************************************************************************* * * Module Name: rsxface - Public interfaces to the resource manager *
******************************************************************************/
/* Local macros for 16,32-bit to 64-bit conversion */ #define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field) #define ACPI_COPY_ADDRESS(out, in) \
ACPI_COPY_FIELD(out, in, resource_type); \
ACPI_COPY_FIELD(out, in, producer_consumer); \
ACPI_COPY_FIELD(out, in, decode); \
ACPI_COPY_FIELD(out, in, min_address_fixed); \
ACPI_COPY_FIELD(out, in, max_address_fixed); \
ACPI_COPY_FIELD(out, in, info); \
ACPI_COPY_FIELD(out, in, address.granularity); \
ACPI_COPY_FIELD(out, in, address.minimum); \
ACPI_COPY_FIELD(out, in, address.maximum); \
ACPI_COPY_FIELD(out, in, address.translation_offset); \
ACPI_COPY_FIELD(out, in, address.address_length); \
ACPI_COPY_FIELD(out, in, resource_source); /* Local prototypes */ static acpi_status
acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context);
/******************************************************************************* * * FUNCTION: acpi_rs_validate_parameters * * PARAMETERS: device_handle - Handle to a device * buffer - Pointer to a data buffer * return_node - Pointer to where the device node is returned * * RETURN: Status * * DESCRIPTION: Common parameter validation for resource interfaces *
******************************************************************************/
/* * Must have a valid handle to an ACPI device
*/ if (!device_handle) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
node = acpi_ns_validate_handle(device_handle); if (!node) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
if (node->type != ACPI_TYPE_DEVICE) {
return_ACPI_STATUS(AE_TYPE);
}
/* * Validate the user buffer object * * if there is a non-zero buffer length we also need a valid pointer in * the buffer. If it's a zero buffer length, we'll be returning the * needed buffer size (later), so keep going.
*/
status = acpi_ut_validate_buffer(buffer); if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
*return_node = node;
return_ACPI_STATUS(AE_OK);
}
/******************************************************************************* * * FUNCTION: acpi_get_irq_routing_table * * PARAMETERS: device_handle - Handle to the Bus device we are querying * ret_buffer - Pointer to a buffer to receive the * current resources for the device * * RETURN: Status * * DESCRIPTION: This function is called to get the IRQ routing table for a * specific bus. The caller must first acquire a handle for the * desired bus. The routine table is placed in the buffer pointed * to by the ret_buffer variable parameter. * * If the function fails an appropriate status will be returned * and the value of ret_buffer is undefined. * * This function attempts to execute the _PRT method contained in * the object indicated by the passed device_handle. *
******************************************************************************/
/* Validate parameters then dispatch to internal routine */
status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_rs_get_prt_method_data(node, ret_buffer);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_get_irq_routing_table)
/******************************************************************************* * * FUNCTION: acpi_get_current_resources * * PARAMETERS: device_handle - Handle to the device object for the * device we are querying * ret_buffer - Pointer to a buffer to receive the * current resources for the device * * RETURN: Status * * DESCRIPTION: This function is called to get the current resources for a * specific device. The caller must first acquire a handle for * the desired device. The resource data is placed in the buffer * pointed to by the ret_buffer variable parameter. * * If the function fails an appropriate status will be returned * and the value of ret_buffer is undefined. * * This function attempts to execute the _CRS method contained in * the object indicated by the passed device_handle. *
******************************************************************************/
acpi_status
acpi_get_current_resources(acpi_handle device_handle, struct acpi_buffer *ret_buffer)
{
acpi_status status; struct acpi_namespace_node *node;
ACPI_FUNCTION_TRACE(acpi_get_current_resources);
/* Validate parameters then dispatch to internal routine */
status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_rs_get_crs_method_data(node, ret_buffer);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_get_current_resources)
/******************************************************************************* * * FUNCTION: acpi_get_possible_resources * * PARAMETERS: device_handle - Handle to the device object for the * device we are querying * ret_buffer - Pointer to a buffer to receive the * resources for the device * * RETURN: Status * * DESCRIPTION: This function is called to get a list of the possible resources * for a specific device. The caller must first acquire a handle * for the desired device. The resource data is placed in the * buffer pointed to by the ret_buffer variable. * * If the function fails an appropriate status will be returned * and the value of ret_buffer is undefined. *
******************************************************************************/
acpi_status
acpi_get_possible_resources(acpi_handle device_handle, struct acpi_buffer *ret_buffer)
{
acpi_status status; struct acpi_namespace_node *node;
ACPI_FUNCTION_TRACE(acpi_get_possible_resources);
/* Validate parameters then dispatch to internal routine */
status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_rs_get_prs_method_data(node, ret_buffer);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_get_possible_resources)
/******************************************************************************* * * FUNCTION: acpi_set_current_resources * * PARAMETERS: device_handle - Handle to the device object for the * device we are setting resources * in_buffer - Pointer to a buffer containing the * resources to be set for the device * * RETURN: Status * * DESCRIPTION: This function is called to set the current resources for a * specific device. The caller must first acquire a handle for * the desired device. The resource data is passed to the routine * the buffer pointed to by the in_buffer variable. *
******************************************************************************/
acpi_status
acpi_set_current_resources(acpi_handle device_handle, struct acpi_buffer *in_buffer)
{
acpi_status status; struct acpi_namespace_node *node;
ACPI_FUNCTION_TRACE(acpi_set_current_resources);
/* Validate the buffer, don't allow zero length */
if ((!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Validate parameters then dispatch to internal routine */
status = acpi_rs_validate_parameters(device_handle, in_buffer, &node); if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_rs_set_srs_method_data(node, in_buffer);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_set_current_resources)
/******************************************************************************* * * FUNCTION: acpi_get_event_resources * * PARAMETERS: device_handle - Handle to the device object for the * device we are getting resources * in_buffer - Pointer to a buffer containing the * resources to be set for the device * * RETURN: Status * * DESCRIPTION: This function is called to get the event resources for a * specific device. The caller must first acquire a handle for * the desired device. The resource data is passed to the routine * the buffer pointed to by the in_buffer variable. Uses the * _AEI method. *
******************************************************************************/
acpi_status
acpi_get_event_resources(acpi_handle device_handle, struct acpi_buffer *ret_buffer)
{
acpi_status status; struct acpi_namespace_node *node;
ACPI_FUNCTION_TRACE(acpi_get_event_resources);
/* Validate parameters then dispatch to internal routine */
status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_rs_get_aei_method_data(node, ret_buffer);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_get_event_resources)
/****************************************************************************** * * FUNCTION: acpi_resource_to_address64 * * PARAMETERS: resource - Pointer to a resource * out - Pointer to the users's return buffer * (a struct acpi_resource_address64) * * RETURN: Status * * DESCRIPTION: If the resource is an address16, address32, or address64, * copy it to the address64 return buffer. This saves the * caller from having to duplicate code for different-sized * addresses. *
******************************************************************************/
acpi_status
acpi_resource_to_address64(struct acpi_resource *resource, struct acpi_resource_address64 *out)
{ struct acpi_resource_address16 *address16; struct acpi_resource_address32 *address32;
if (!resource || !out) { return (AE_BAD_PARAMETER);
}
/* Convert 16 or 32 address descriptor to 64 */
switch (resource->type) { case ACPI_RESOURCE_TYPE_ADDRESS16:
/******************************************************************************* * * FUNCTION: acpi_get_vendor_resource * * PARAMETERS: device_handle - Handle for the parent device object * name - Method name for the parent resource * (METHOD_NAME__CRS or METHOD_NAME__PRS) * uuid - Pointer to the UUID to be matched. * includes both subtype and 16-byte UUID * ret_buffer - Where the vendor resource is returned * * RETURN: Status * * DESCRIPTION: Walk a resource template for the specified device to find a * vendor-defined resource that matches the supplied UUID and * UUID subtype. Returns a struct acpi_resource of type Vendor. *
******************************************************************************/
acpi_status
acpi_get_vendor_resource(acpi_handle device_handle, char *name, struct acpi_vendor_uuid *uuid, struct acpi_buffer *ret_buffer)
{ struct acpi_vendor_walk_info info;
acpi_status status;
/* Other parameters are validated by acpi_walk_resources */
if (!uuid || !ret_buffer) { return (AE_BAD_PARAMETER);
}
/* Walk the _CRS or _PRS resource list for this device */
status =
acpi_walk_resources(device_handle, name,
acpi_rs_match_vendor_resource, &info); if (ACPI_FAILURE(status)) { return (status);
}
return (info.status);
}
ACPI_EXPORT_SYMBOL(acpi_get_vendor_resource)
/******************************************************************************* * * FUNCTION: acpi_rs_match_vendor_resource * * PARAMETERS: acpi_walk_resource_callback * * RETURN: Status * * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID *
******************************************************************************/ static acpi_status
acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context)
{ struct acpi_vendor_walk_info *info = context; struct acpi_resource_vendor_typed *vendor; struct acpi_buffer *buffer;
acpi_status status;
/* Ignore all descriptors except Vendor */
if (resource->type != ACPI_RESOURCE_TYPE_VENDOR) { return (AE_OK);
}
vendor = &resource->data.vendor_typed;
/* * For a valid match, these conditions must hold: * * 1) Length of descriptor data must be at least as long as a UUID struct * 2) The UUID subtypes must match * 3) The UUID data must match
*/ if ((vendor->byte_length < (ACPI_UUID_LENGTH + 1)) ||
(vendor->uuid_subtype != info->uuid->subtype) ||
(memcmp(vendor->uuid, info->uuid->data, ACPI_UUID_LENGTH))) { return (AE_OK);
}
/* Validate/Allocate/Clear caller buffer */
buffer = info->buffer;
status = acpi_ut_initialize_buffer(buffer, resource->length); if (ACPI_FAILURE(status)) { return (status);
}
/* Found the correct resource, copy and return it */
/******************************************************************************* * * FUNCTION: acpi_walk_resource_buffer * * PARAMETERS: buffer - Formatted buffer returned by one of the * various Get*Resource functions * user_function - Called for each resource * context - Passed to user_function * * RETURN: Status * * DESCRIPTION: Walks the input resource template. The user_function is called * once for each resource in the list. *
******************************************************************************/
/* Walk the resource list until the end_tag is found (or buffer end) */
while (resource < resource_end) {
/* Sanity check the resource type */
if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
status = AE_AML_INVALID_RESOURCE_TYPE; break;
}
/* Sanity check the length. It must not be zero, or we loop forever */
if (!resource->length) {
return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
}
/* 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_NEXT_RESOURCE(resource);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_walk_resource_buffer)
/******************************************************************************* * * 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 or METHOD_NAME__DMA) * 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;
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