449 lines
13 KiB
C
449 lines
13 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/*******************************************************************************
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*
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* Module Name: rscreate - Create resource lists/tables
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*
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******************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acresrc.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME("rscreate")
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/*******************************************************************************
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*
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* FUNCTION: acpi_buffer_to_resource
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*
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* PARAMETERS: aml_buffer - Pointer to the resource byte stream
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* aml_buffer_length - Length of the aml_buffer
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* resource_ptr - Where the converted resource is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert a raw AML buffer to a resource list
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*
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******************************************************************************/
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acpi_status
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acpi_buffer_to_resource(u8 *aml_buffer,
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u16 aml_buffer_length,
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struct acpi_resource **resource_ptr)
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{
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acpi_status status;
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acpi_size list_size_needed;
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void *resource;
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void *current_resource_ptr;
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ACPI_FUNCTION_TRACE(acpi_buffer_to_resource);
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/*
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* Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag
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* is not required here.
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*/
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/* Get the required length for the converted resource */
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status =
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acpi_rs_get_list_length(aml_buffer, aml_buffer_length,
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&list_size_needed);
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if (status == AE_AML_NO_RESOURCE_END_TAG) {
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status = AE_OK;
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}
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Allocate a buffer for the converted resource */
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resource = ACPI_ALLOCATE_ZEROED(list_size_needed);
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current_resource_ptr = resource;
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if (!resource) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Perform the AML-to-Resource conversion */
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status = acpi_ut_walk_aml_resources(NULL, aml_buffer, aml_buffer_length,
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acpi_rs_convert_aml_to_resources,
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¤t_resource_ptr);
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if (status == AE_AML_NO_RESOURCE_END_TAG) {
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status = AE_OK;
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}
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if (ACPI_FAILURE(status)) {
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ACPI_FREE(resource);
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} else {
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*resource_ptr = resource;
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}
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_buffer_to_resource)
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_create_resource_list
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*
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* PARAMETERS: aml_buffer - Pointer to the resource byte stream
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* output_buffer - Pointer to the user's buffer
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*
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* RETURN: Status: AE_OK if okay, else a valid acpi_status code
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* If output_buffer is not large enough, output_buffer_length
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* indicates how large output_buffer should be, else it
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* indicates how may u8 elements of output_buffer are valid.
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*
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* DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
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* execution and parses the stream to create a linked list
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* of device resources.
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*
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******************************************************************************/
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acpi_status
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acpi_rs_create_resource_list(union acpi_operand_object *aml_buffer,
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struct acpi_buffer *output_buffer)
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{
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acpi_status status;
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u8 *aml_start;
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acpi_size list_size_needed = 0;
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u32 aml_buffer_length;
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void *resource;
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ACPI_FUNCTION_TRACE(rs_create_resource_list);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlBuffer = %p\n", aml_buffer));
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/* Params already validated, so we don't re-validate here */
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aml_buffer_length = aml_buffer->buffer.length;
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aml_start = aml_buffer->buffer.pointer;
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/*
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* Pass the aml_buffer into a module that can calculate
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* the buffer size needed for the linked list
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*/
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status = acpi_rs_get_list_length(aml_start, aml_buffer_length,
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&list_size_needed);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
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status, (u32) list_size_needed));
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Validate/Allocate/Clear caller buffer */
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status = acpi_ut_initialize_buffer(output_buffer, list_size_needed);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Do the conversion */
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resource = output_buffer->pointer;
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status = acpi_ut_walk_aml_resources(NULL, aml_start, aml_buffer_length,
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acpi_rs_convert_aml_to_resources,
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&resource);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
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output_buffer->pointer, (u32) output_buffer->length));
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_create_pci_routing_table
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*
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* PARAMETERS: package_object - Pointer to a package containing one
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* of more ACPI_OPERAND_OBJECTs
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* output_buffer - Pointer to the user's buffer
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*
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* RETURN: Status AE_OK if okay, else a valid acpi_status code.
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* If the output_buffer is too small, the error will be
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* AE_BUFFER_OVERFLOW and output_buffer->Length will point
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* to the size buffer needed.
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*
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* DESCRIPTION: Takes the union acpi_operand_object package and creates a
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* linked list of PCI interrupt descriptions
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*
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* NOTE: It is the caller's responsibility to ensure that the start of the
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* output buffer is aligned properly (if necessary).
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*
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******************************************************************************/
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acpi_status
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acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
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struct acpi_buffer *output_buffer)
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{
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u8 *buffer;
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union acpi_operand_object **top_object_list;
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union acpi_operand_object **sub_object_list;
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union acpi_operand_object *obj_desc;
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acpi_size buffer_size_needed = 0;
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u32 number_of_elements;
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u32 index;
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struct acpi_pci_routing_table *user_prt;
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struct acpi_namespace_node *node;
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acpi_status status;
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struct acpi_buffer path_buffer;
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ACPI_FUNCTION_TRACE(rs_create_pci_routing_table);
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/* Params already validated, so we don't re-validate here */
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/* Get the required buffer length */
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status =
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acpi_rs_get_pci_routing_table_length(package_object,
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&buffer_size_needed);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
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(u32) buffer_size_needed));
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/* Validate/Allocate/Clear caller buffer */
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status = acpi_ut_initialize_buffer(output_buffer, buffer_size_needed);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a
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* package that in turn contains an u64 Address, a u8 Pin,
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* a Name, and a u8 source_index.
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*/
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top_object_list = package_object->package.elements;
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number_of_elements = package_object->package.count;
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buffer = output_buffer->pointer;
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user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
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for (index = 0; index < number_of_elements; index++) {
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/*
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* Point user_prt past this current structure
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*
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* NOTE: On the first iteration, user_prt->Length will
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* be zero because we cleared the return buffer earlier
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*/
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buffer += user_prt->length;
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user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
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/*
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* Fill in the Length field with the information we have at this
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* point. The minus four is to subtract the size of the u8
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* Source[4] member because it is added below.
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*/
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user_prt->length = (sizeof(struct acpi_pci_routing_table) - 4);
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/* Each subpackage must be of length 4 */
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if ((*top_object_list)->package.count != 4) {
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ACPI_ERROR((AE_INFO,
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"(PRT[%u]) Need package of length 4, found length %u",
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index, (*top_object_list)->package.count));
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return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT);
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}
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/*
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* Dereference the subpackage.
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* The sub_object_list will now point to an array of the four IRQ
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* elements: [Address, Pin, Source, source_index]
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*/
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sub_object_list = (*top_object_list)->package.elements;
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/* 1) First subobject: Dereference the PRT.Address */
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obj_desc = sub_object_list[0];
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if (!obj_desc || obj_desc->common.type != ACPI_TYPE_INTEGER) {
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ACPI_ERROR((AE_INFO,
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"(PRT[%u].Address) Need Integer, found %s",
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index,
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acpi_ut_get_object_type_name(obj_desc)));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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user_prt->address = obj_desc->integer.value;
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/* 2) Second subobject: Dereference the PRT.Pin */
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obj_desc = sub_object_list[1];
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if (!obj_desc || obj_desc->common.type != ACPI_TYPE_INTEGER) {
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ACPI_ERROR((AE_INFO,
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"(PRT[%u].Pin) Need Integer, found %s",
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index,
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acpi_ut_get_object_type_name(obj_desc)));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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user_prt->pin = (u32) obj_desc->integer.value;
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/*
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* 3) Third subobject: Dereference the PRT.source_name
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* The name may be unresolved (slack mode), so allow a null object
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*/
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obj_desc = sub_object_list[2];
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if (obj_desc) {
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switch (obj_desc->common.type) {
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case ACPI_TYPE_LOCAL_REFERENCE:
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if (obj_desc->reference.class !=
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ACPI_REFCLASS_NAME) {
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ACPI_ERROR((AE_INFO,
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"(PRT[%u].Source) Need name, found Reference Class 0x%X",
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index,
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obj_desc->reference.class));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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node = obj_desc->reference.node;
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/* Use *remaining* length of the buffer as max for pathname */
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path_buffer.length = output_buffer->length -
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(u32) ((u8 *) user_prt->source -
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(u8 *) output_buffer->pointer);
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path_buffer.pointer = user_prt->source;
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status = acpi_ns_handle_to_pathname((acpi_handle)node, &path_buffer, FALSE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* +1 to include null terminator */
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user_prt->length +=
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(u32)strlen(user_prt->source) + 1;
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break;
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case ACPI_TYPE_STRING:
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strcpy(user_prt->source,
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obj_desc->string.pointer);
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/*
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* Add to the Length field the length of the string
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* (add 1 for terminator)
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*/
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user_prt->length += obj_desc->string.length + 1;
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break;
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case ACPI_TYPE_INTEGER:
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/*
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* If this is a number, then the Source Name is NULL, since
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* the entire buffer was zeroed out, we can leave this alone.
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*
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* Add to the Length field the length of the u32 NULL
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*/
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user_prt->length += sizeof(u32);
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"(PRT[%u].Source) Need Ref/String/Integer, found %s",
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index,
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acpi_ut_get_object_type_name
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(obj_desc)));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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}
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/* Now align the current length */
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user_prt->length =
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(u32) ACPI_ROUND_UP_TO_64BIT(user_prt->length);
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/* 4) Fourth subobject: Dereference the PRT.source_index */
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obj_desc = sub_object_list[3];
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if (!obj_desc || obj_desc->common.type != ACPI_TYPE_INTEGER) {
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ACPI_ERROR((AE_INFO,
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"(PRT[%u].SourceIndex) Need Integer, found %s",
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index,
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acpi_ut_get_object_type_name(obj_desc)));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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user_prt->source_index = (u32) obj_desc->integer.value;
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/* Point to the next union acpi_operand_object in the top level package */
|
||
|
|
|
||
|
|
top_object_list++;
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
|
||
|
|
output_buffer->pointer, (u32) output_buffer->length));
|
||
|
|
return_ACPI_STATUS(AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_rs_create_aml_resources
|
||
|
|
*
|
||
|
|
* PARAMETERS: resource_list - Pointer to the resource list buffer
|
||
|
|
* output_buffer - Where the AML buffer is returned
|
||
|
|
*
|
||
|
|
* RETURN: Status AE_OK if okay, else a valid acpi_status code.
|
||
|
|
* If the output_buffer is too small, the error will be
|
||
|
|
* AE_BUFFER_OVERFLOW and output_buffer->Length will point
|
||
|
|
* to the size buffer needed.
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Converts a list of device resources to an AML bytestream
|
||
|
|
* to be used as input for the _SRS control method.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_rs_create_aml_resources(struct acpi_buffer *resource_list,
|
||
|
|
struct acpi_buffer *output_buffer)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
acpi_size aml_size_needed = 0;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(rs_create_aml_resources);
|
||
|
|
|
||
|
|
/* Params already validated, no need to re-validate here */
|
||
|
|
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ResourceList Buffer = %p\n",
|
||
|
|
resource_list->pointer));
|
||
|
|
|
||
|
|
/* Get the buffer size needed for the AML byte stream */
|
||
|
|
|
||
|
|
status =
|
||
|
|
acpi_rs_get_aml_length(resource_list->pointer,
|
||
|
|
resource_list->length, &aml_size_needed);
|
||
|
|
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n",
|
||
|
|
(u32)aml_size_needed, acpi_format_exception(status)));
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Validate/Allocate/Clear caller buffer */
|
||
|
|
|
||
|
|
status = acpi_ut_initialize_buffer(output_buffer, aml_size_needed);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Do the conversion */
|
||
|
|
|
||
|
|
status = acpi_rs_convert_resources_to_aml(resource_list->pointer,
|
||
|
|
aml_size_needed,
|
||
|
|
output_buffer->pointer);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
|
||
|
|
output_buffer->pointer, (u32) output_buffer->length));
|
||
|
|
return_ACPI_STATUS(AE_OK);
|
||
|
|
}
|