Orange Pi5 kernel

// 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);
}