225 lines
6.7 KiB
C
225 lines
6.7 KiB
C
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* Module Name: rslist - Linked list utilities
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include <acpi/acpi.h>
|
||
|
|
#include "accommon.h"
|
||
|
|
#include "acresrc.h"
|
||
|
|
|
||
|
|
#define _COMPONENT ACPI_RESOURCES
|
||
|
|
ACPI_MODULE_NAME("rslist")
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_rs_convert_aml_to_resources
|
||
|
|
*
|
||
|
|
* PARAMETERS: acpi_walk_aml_callback
|
||
|
|
* resource_ptr - Pointer to the buffer that will
|
||
|
|
* contain the output structures
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Convert an AML resource to an internal representation of the
|
||
|
|
* resource that is aligned and easier to access.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
acpi_status
|
||
|
|
acpi_rs_convert_aml_to_resources(u8 * aml,
|
||
|
|
u32 length,
|
||
|
|
u32 offset, u8 resource_index, void **context)
|
||
|
|
{
|
||
|
|
struct acpi_resource **resource_ptr =
|
||
|
|
ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context);
|
||
|
|
struct acpi_resource *resource;
|
||
|
|
union aml_resource *aml_resource;
|
||
|
|
struct acpi_rsconvert_info *conversion_table;
|
||
|
|
acpi_status status;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check that the input buffer and all subsequent pointers into it
|
||
|
|
* are aligned on a native word boundary. Most important on IA64
|
||
|
|
*/
|
||
|
|
resource = *resource_ptr;
|
||
|
|
if (ACPI_IS_MISALIGNED(resource)) {
|
||
|
|
ACPI_WARNING((AE_INFO,
|
||
|
|
"Misaligned resource pointer %p", resource));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the appropriate conversion info table */
|
||
|
|
|
||
|
|
aml_resource = ACPI_CAST_PTR(union aml_resource, aml);
|
||
|
|
|
||
|
|
if (acpi_ut_get_resource_type(aml) == ACPI_RESOURCE_NAME_SERIAL_BUS) {
|
||
|
|
if (aml_resource->common_serial_bus.type >
|
||
|
|
AML_RESOURCE_MAX_SERIALBUSTYPE) {
|
||
|
|
conversion_table = NULL;
|
||
|
|
} else {
|
||
|
|
/* This is an I2C, SPI, or UART serial_bus descriptor */
|
||
|
|
|
||
|
|
conversion_table =
|
||
|
|
acpi_gbl_convert_resource_serial_bus_dispatch
|
||
|
|
[aml_resource->common_serial_bus.type];
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
conversion_table =
|
||
|
|
acpi_gbl_get_resource_dispatch[resource_index];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!conversion_table) {
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
|
||
|
|
resource_index));
|
||
|
|
return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Convert the AML byte stream resource to a local resource struct */
|
||
|
|
|
||
|
|
status =
|
||
|
|
acpi_rs_convert_aml_to_resource(resource, aml_resource,
|
||
|
|
conversion_table);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
||
|
|
"Could not convert AML resource (Type 0x%X)",
|
||
|
|
*aml));
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,
|
||
|
|
"Type %.2X, AmlLength %.2X InternalLength %.2X\n",
|
||
|
|
acpi_ut_get_resource_type(aml), length,
|
||
|
|
resource->length));
|
||
|
|
|
||
|
|
/* Point to the next structure in the output buffer */
|
||
|
|
|
||
|
|
*resource_ptr = ACPI_NEXT_RESOURCE(resource);
|
||
|
|
return_ACPI_STATUS(AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_rs_convert_resources_to_aml
|
||
|
|
*
|
||
|
|
* PARAMETERS: resource - Pointer to the resource linked list
|
||
|
|
* aml_size_needed - Calculated size of the byte stream
|
||
|
|
* needed from calling acpi_rs_get_aml_length()
|
||
|
|
* The size of the output_buffer is
|
||
|
|
* guaranteed to be >= aml_size_needed
|
||
|
|
* output_buffer - Pointer to the buffer that will
|
||
|
|
* contain the byte stream
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Takes the resource linked list and parses it, creating a
|
||
|
|
* byte stream of resources in the caller's output buffer
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
|
||
|
|
acpi_size aml_size_needed, u8 * output_buffer)
|
||
|
|
{
|
||
|
|
u8 *aml = output_buffer;
|
||
|
|
u8 *end_aml = output_buffer + aml_size_needed;
|
||
|
|
struct acpi_rsconvert_info *conversion_table;
|
||
|
|
acpi_status status;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml);
|
||
|
|
|
||
|
|
/* Walk the resource descriptor list, convert each descriptor */
|
||
|
|
|
||
|
|
while (aml < end_aml) {
|
||
|
|
|
||
|
|
/* Validate the (internal) Resource Type */
|
||
|
|
|
||
|
|
if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Invalid descriptor type (0x%X) in resource list",
|
||
|
|
resource->type));
|
||
|
|
return_ACPI_STATUS(AE_BAD_DATA);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Sanity check the length. It must not be zero, or we loop forever */
|
||
|
|
|
||
|
|
if (!resource->length) {
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Invalid zero length descriptor in resource list\n"));
|
||
|
|
return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Perform the conversion */
|
||
|
|
|
||
|
|
if (resource->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
|
||
|
|
if (resource->data.common_serial_bus.type >
|
||
|
|
AML_RESOURCE_MAX_SERIALBUSTYPE) {
|
||
|
|
conversion_table = NULL;
|
||
|
|
} else {
|
||
|
|
/* This is an I2C, SPI, or UART serial_bus descriptor */
|
||
|
|
|
||
|
|
conversion_table =
|
||
|
|
acpi_gbl_convert_resource_serial_bus_dispatch
|
||
|
|
[resource->data.common_serial_bus.type];
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
conversion_table =
|
||
|
|
acpi_gbl_set_resource_dispatch[resource->type];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!conversion_table) {
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
|
||
|
|
resource->type));
|
||
|
|
return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
status = acpi_rs_convert_resource_to_aml(resource,
|
||
|
|
ACPI_CAST_PTR(union
|
||
|
|
aml_resource,
|
||
|
|
aml),
|
||
|
|
conversion_table);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
||
|
|
"Could not convert resource (type 0x%X) to AML",
|
||
|
|
resource->type));
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Perform final sanity check on the new AML resource descriptor */
|
||
|
|
|
||
|
|
status =
|
||
|
|
acpi_ut_validate_resource(NULL,
|
||
|
|
ACPI_CAST_PTR(union aml_resource,
|
||
|
|
aml), NULL);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check for end-of-list, normal exit */
|
||
|
|
|
||
|
|
if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
|
||
|
|
|
||
|
|
/* An End Tag indicates the end of the input Resource Template */
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Extract the total length of the new descriptor and set the
|
||
|
|
* Aml to point to the next (output) resource descriptor
|
||
|
|
*/
|
||
|
|
aml += acpi_ut_get_descriptor_length(aml);
|
||
|
|
|
||
|
|
/* Point to the next input resource descriptor */
|
||
|
|
|
||
|
|
resource = ACPI_NEXT_RESOURCE(resource);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Completed buffer, but did not find an end_tag resource descriptor */
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
|
||
|
|
}
|